Bumped version to 1.6

API change - progress bar can be constructed with proper settings.

.travis.yml

@@ -0,0 +1,65 @@
+language: generic
+
+dist: bionic
+
+matrix:
+    include:
+    - env: CXX=g++-9 CC=gcc-9
+      addons:
+        apt:
+          packages:
+            - g++-9
+          sources:
+            - sourceline: 'ppa:ubuntu-toolchain-r/test'
+    - env: CXX=g++-8 CC=gcc-8
+      addons:
+        apt:
+          packages:
+            - g++-8
+    - env: CXX=g++-7 CC=gcc-7
+      addons:
+        apt:
+          packages:
+            - g++-7
+    - env: CXX=g++-6 CC=gcc-6
+      addons:
+        apt:
+          packages:
+            - g++-6
+    - env: CXX=g++-5 CC=gcc-5
+      addons:
+        apt:
+          packages:
+            - g++-5
+
+    - env: CXX=clang++-9 CC=clang-9
+      addons:
+        apt:
+          packages:
+            - clang-9
+            - libc++-9-dev
+            - libc++abi-9-dev
+          sources:
+            - sourceline: 'deb http://apt.llvm.org/bionic/ llvm-toolchain-bionic-9 main'
+              key_url: 'https://apt.llvm.org/llvm-snapshot.gpg.key'
+    - env: CXX=clang++-8 CC=clang-8
+      addons:
+        apt:
+          packages:
+            - clang-8
+            - libc++-8-dev
+            - libc++abi-8-dev
+    - env: CXX=clang++-7 CC=clang-7
+      addons:
+        apt:
+          packages:
+            - clang-7
+            - libc++-7-dev
+            - libc++abi-7-dev
+
+
+script:
+    - if [[ "$CXX" == clang* ]]; then export CXXFLAGS="-stdlib=libc++"; fi
+    - mkdir build && cd build
+    - cmake -DDEMO=ON -DSAMPLES=ON ..
+    - make

CMakeLists.txt

@@ -1,32 +1,49 @@
 cmake_minimum_required(VERSION 3.8)
-project(indica VERSION 1.0.0 LANGUAGES CXX)
-option(INDICA_BUILD_TESTS OFF)
+project(indicators VERSION 1.6.0 LANGUAGES CXX DESCRIPTION "Activity Indicators for Modern C++")
+option(INDICATORS_BUILD_TESTS OFF)
+option(SAMPLES "Build Samples" OFF)
+option(DEMO "Build Demo" OFF)
 
 include(CMakePackageConfigHelpers)
 include(GNUInstallDirs)
 
 find_package(Threads REQUIRED)
 
-add_library(indica INTERFACE)
-add_library(indica::indica ALIAS indica)
+add_library(indicators INTERFACE)
+add_library(indicators::indicators ALIAS indicators)
 
-target_compile_features(indica INTERFACE cxx_std_11)
-target_include_directories(indica INTERFACE
+target_compile_features(indicators INTERFACE cxx_std_11)
+target_include_directories(indicators INTERFACE
   $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
   $<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}/include>)
-target_link_libraries(indica INTERFACE Threads::Threads)
+target_link_libraries(indicators INTERFACE Threads::Threads)
 
-configure_package_config_file(indicaConfig.cmake.in
-  ${CMAKE_CURRENT_BINARY_DIR}/indicaConfig.cmake
-  INSTALL_DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/indica)
 
-install(TARGETS indica EXPORT indicaTargets)
-install(EXPORT indicaTargets
-        FILE indicaTargets.cmake
-        NAMESPACE indica::
-        DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/indica)
-install(FILES ${CMAKE_CURRENT_BINARY_DIR}/indicaConfig.cmake
-        DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/indica)
+if( DEMO )
+    add_subdirectory(demo)
+endif()
+
+if( SAMPLES )
+    add_subdirectory(samples)
+endif()
+
+configure_package_config_file(indicatorsConfig.cmake.in
+  ${CMAKE_CURRENT_BINARY_DIR}/indicatorsConfig.cmake
+  INSTALL_DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/indicators)
+
+configure_file(indicators.pc.in
+  "${CMAKE_CURRENT_BINARY_DIR}/pkgconfig/indicators.pc"
+  @ONLY)
+
+install(TARGETS indicators EXPORT indicatorsTargets)
+install(EXPORT indicatorsTargets
+        FILE indicatorsTargets.cmake
+        NAMESPACE indicators::
+        DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/indicators)
+install(FILES ${CMAKE_CURRENT_BINARY_DIR}/indicatorsConfig.cmake
+        DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/indicators)
+install(FILES ${CMAKE_CURRENT_BINARY_DIR}/pkgconfig/indicators.pc
+	DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/pkgconfig/)
 install(DIRECTORY ${CMAKE_CURRENT_LIST_DIR}/include/indicators
         DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
         USE_SOURCE_PERMISSIONS

README.md

@@ -3,10 +3,16 @@
 </p>
 
 <p align="center">
+  <a href="https://travis-ci.com/p-ranav/indicators">
+    <img src="https://travis-ci.com/p-ranav/indicators.svg?branch=master" alt="ci status"/>
+  </a>
+  <a href="https://www.codacy.com/manual/p-ranav/indicators?utm_source=github.com&amp;utm_medium=referral&amp;utm_content=p-ranav/indicators&amp;utm_campaign=Badge_Grade">
+    <img src="https://api.codacy.com/project/badge/Grade/93401e73f250407cb32445afec4e3e99" alt="codacy"/>
+  </a>
   <a href="https://github.com/p-ranav/indicators/blob/master/LICENSE">
     <img src="https://img.shields.io/badge/License-MIT-yellow.svg" alt="license"/>
   </a>
-  <img src="https://img.shields.io/badge/version-1.0-blue.svg?cacheSeconds=2592000" alt="version"/>
+  <img src="https://img.shields.io/badge/version-1.6-blue.svg?cacheSeconds=2592000" alt="version"/>
 </p>
 
 <p align="center">
@@ -15,56 +21,30 @@
 
 # Highlights
 
-* Thread-safe `ProgressBar` and `ProgressSpinner` classes
+* Thread-safe progress bars and spinners
 * Header-only library. Grab a copy of `include/indicators`
 * Source for the above GIF can be found [here](demo/demo.cpp)
 * MIT License
 
+# Table of Contents
+
+* [Progress Bar](#progress-bar)
+* [Block Progress Bar](#block-progress-bar)
+* [Multi Progress](#multiprogress)
+* [Progress Spinner](#progress-spinner)
+* [Contributing](#contributing)
+* [License](#license)
+
 # Progress bar
 
-To introduce a progress bar in your application, include `indicators/progress_bar.hpp` and create a `ProgressBar` object. 
-
-```cpp
-#include <indicators/progress_bar.hpp>
-
-int main() {
-  indicators::ProgressBar bar;
-  return 0;
-}
-```
-
-Here's the general structure of a progress bar:
+To introduce a progress bar in your application, include `indicators/progress_bar.hpp` and create a `ProgressBar` object. Here's the general structure of a progress bar:
 
 ```
-<prefix_text> <bar_start> <fill> <lead> <remaining> <bar_end>   <progress_percentage>? <postfix_text>
-              ^^^^^^^^^^^^^^^^^^ Bar Width ^^^^^^^^^^^^^^^^^^   ^^^^^ Show/Hide ^^^^^
+{prefix} {start} {fill} {lead} {remaining} {end} {percentage} [{elapsed}<{remaining}] {postfix}
+         ^^^^^^^^^^^^^ Bar Width ^^^^^^^^^^^^^^^   
 ```
 
-Each of these elements (and more) can be configured using the ProgressBar API. Here's an example configuration:
-
-```cpp
-#include <indicators/progress_bar.hpp>
-
-int main() {
-  indicators::ProgressBar bar;
-  
-  // Configure the bar
-  bar.set_bar_width(50);
-  bar.start_bar_with("[");
-  bar.fill_bar_progress_with("=");
-  bar.lead_bar_progress_with(">");
-  bar.fill_bar_remainder_with(" ");
-  bar.end_bar_with("]");
-  bar.set_postfix_text("Getting started");
-  bar.set_foreground_color(indicators::Color::GREEN); 
-  
-  // Update bar state
-
-  return 0;
-}
-```
-
-Now that the bar is configured, let's update the state of the bar. The amount of progress in ProgressBar is maintained as a float in range `[0, 100]`. When progress reaches 100, the progression is complete. 
+The amount of progress in ProgressBar is maintained as a float in range `[0, 100]`. When progress reaches 100, the progression is complete. 
 
 From application-level code, there are two ways in which you can update this progress:
 
@@ -72,23 +52,27 @@ From application-level code, there are two ways in which you can update this pro
 
 You can update the progress bar using `bar.tick()` which increments progress by exactly `1%`.
 
+<p align="center">
+  <img src="img/progress_bar_tick.gif"/>  
+</p>
+
 ```cpp
 #include <indicators/progress_bar.hpp>
 #include <thread>
 #include <chrono>
 
 int main() {
-  indicators::ProgressBar bar;
-  
-  // Configure the bar
-  bar.set_bar_width(50);
-  bar.start_bar_with("[");
-  bar.fill_bar_progress_with("=");
-  bar.lead_bar_progress_with(">");
-  bar.fill_bar_remainder_with(" ");
-  bar.end_bar_with("]");
-  bar.set_postfix_text("Getting started");
-  bar.set_foreground_color(indicators::Color::GREEN); 
+  using namespace indicators;
+  ProgressBar bar{
+    option::BarWidth{50},
+    option::Start{"["},
+    option::Fill{"="},
+    option::Lead{">"},
+    option::Remainder{" "},
+    option::End{"]"},
+    option::PostfixText{"Extracting Archive"};
+    option::ForegroundColor{Color::GREEN};
+  };
   
   // Update bar state
   while (true) {
@@ -108,121 +92,114 @@ The above code will print a progress bar that goes from 0 to 100% at the rate of
 
 If you'd rather control progress of the bar in discrete steps, consider using `bar.set_progress(value)`. Example:
 
+
+<p align="center">
+  <img src="img/progress_bar_set_progress.gif"/>  
+</p>
+
 ```cpp
+#include <chrono>
 #include <indicators/progress_bar.hpp>
 #include <thread>
-#include <chrono>
 
 int main() {
-  indicators::ProgressBar bar;
-  
-  // Configure the bar
-  bar.set_bar_width(50);
-  bar.start_bar_with("[");
-  bar.fill_bar_progress_with("=");
-  bar.lead_bar_progress_with(">");
-  bar.fill_bar_remainder_with(" ");
-  bar.end_bar_with("]");
-  bar.set_postfix_text("Getting started");
-  bar.set_foreground_color(indicators::Color::GREEN); 
-  
+
+  // Hide cursor
+  std::cout << "\e[?25l";
+  using namespace indicators;
+  ProgressBar bar{
+    option::BarWidth{50},
+    option::Start{"["},
+    option::Fill{"■"},
+    option::Lead{"■"},
+    option::Remainder{"-"},
+    option::End{" ]"},
+    option::PostfixText{"Loading dependency 1/4"},
+    option::ForegroundColor{Color::CYAN}  
+  };
+
   // Update bar state
-  
   bar.set_progress(10); // 10% done
-  
+
   // do some work
-  std::this_thread::sleep_for(std::chrono::milliseconds(100));
-  
+  std::this_thread::sleep_for(std::chrono::milliseconds(800));
+
+  bar.set_option(option::PostfixText{"Loading dependency 2/4"});  
+
   bar.set_progress(30); // 30% done
-  
-  // do some more work             
-  std::this_thread::sleep_for(std::chrono::milliseconds(600));
-  
+
+  // do some more work
+  std::this_thread::sleep_for(std::chrono::milliseconds(700));
+
+  bar.set_option(option::PostfixText{"Loading dependency 3/4"});  
+
   bar.set_progress(65); // 65% done
-  
+
   // do final bit of work
-  std::this_thread::sleep_for(std::chrono::milliseconds(300));
-  
+  std::this_thread::sleep_for(std::chrono::milliseconds(900));
+
+  bar.set_option(option::PostfixText{"Loaded dependencies!"});
+
   bar.set_progress(100); // all done
-  
+
+  bar.mark_as_completed();
+
+  // Show cursor
+  std::cout << "\e[?25h";  
+
   return 0;
 }
 ```
 
-## Multi-threaded Example
+## Showing Time Elapsed/Remaining
+
+All progress bars and spinners in `indicators` support showing time elapsed and time remaining. Inspired by python's [tqdm](https://github.com/tqdm/tqdm) module, the format of this meter is `[{elapsed}<{remaining}]`:
+
+<p align="center">
+  <img src="img/time_meter.gif"/>  
+</p>
 
 ```cpp
+#include <chrono>
 #include <indicators/progress_bar.hpp>
-#include <vector>
+#include <thread>
 
 int main() {
-
-  indicators::ProgressBar bar;
-  bar.set_bar_width(50);
-  bar.start_bar_with("[");
-  bar.fill_bar_progress_with("■");
-  bar.lead_bar_progress_with("■");
-  bar.fill_bar_remainder_with("-");
-  bar.end_bar_with("]");
-  bar.set_foreground_color(indicators::Color::YELLOW);
-
-  // As configured, the bar will look like this:
-  //
-  // [■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■-------------] 70%
-  //
-  //
-  
-  std::atomic<size_t> index{0};
-  std::vector<std::string> status_text =
-    {
-     "Rocket.exe is not responding",
-     "Finding a replacement engineer",
-     "Buying more snacks",
-     "Assimilating the modding community",
-     "Crossing fingers",
-     "Porting KSP to a Nokia 3310"
-  };
-  
-  // Let's say you want to append some status text to the right of the progress bar
-  // You can use bar.set_postfix_text(...) to append text to the right
-  //
-  // [■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■-------------] 70% Finding a replacement engineer
-  //                                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-  //
-  //  
-
-  auto job = [&bar, &index, &status_text]() {
-    while (true) {
-      if (bar.is_completed()) {
-        break;
-      }
-      bar.set_postfix_text(status_text[index % status_text.size()]);
-      bar.tick();
-      index += 1;
-      std::this_thread::sleep_for(std::chrono::milliseconds(200));
-    }
+  using namespace indicators;
+  indicators::ProgressBar bar{
+    option::BarWidth{50},
+    option::Start{" ["},
+    option::Fill{"█"},
+    option::Lead{"█"},
+    option::Remainder{"-"},
+    option::End{"]"},
+    option::PrefixText{"Training Gaze Network "},
+    option::ForegroundColor{Color::YELLOW}
+    option::ShowElapsedTime{true};
+    option::ShowRemainingTime{true};
   };
 
-  std::thread first_job(job);
-  std::thread second_job(job);
-  std::thread third_job(job);
-  std::thread last_job(job);
+  // Update bar state
+  while (true) {
+    bar.tick();
+    if (bar.is_completed())
+      break;
+    std::this_thread::sleep_for(std::chrono::milliseconds(1000));
+  }
+
+  // Show cursor
+  std::cout << "\e[?25h";  
 
-  first_job.join();
-  second_job.join();
-  third_job.join();
-  last_job.join();
-  
   return 0;
 }
 ```
 
-# Smooth Block Progress Bar
+# Block Progress Bar
 
 Are you in need of a smooth block progress bar using [unicode block elements](https://en.wikipedia.org/wiki/Block_Elements)? Use `BlockProgressBar` instead of `ProgressBar`. Thanks to [this blog post](https://mike42.me/blog/2018-06-make-better-cli-progress-bars-with-unicode-block-characters) for making `BlockProgressBar` an easy addition to the library. 
 
 <p align="center">
-  <img height="70" src="img/block_progress_bar.gif"/>  
+  <img src="img/block_progress_bar.gif"/>  
 </p>
 
 ```cpp
@@ -234,14 +211,14 @@ int main() {
 
   // Hide cursor
   std::cout << "\e[?25l";
-  
-  indicators::BlockProgressBar bar;
-  
-  // Configure the bar
-  bar.set_bar_width(80);
-  bar.start_bar_with("[");
-  bar.end_bar_with("]");
-  bar.set_foreground_color(indicators::Color::WHITE); 
+  using namespace indicators;
+
+  BlockProgressBar bar{
+    option::BarWidth{80},
+    option::Start{"["},
+    option::End{"]"},
+    option::ForegroundColor{Color::WHITE}  
+  };
   
   // Update bar state
   auto progress = 0.0f;
@@ -260,68 +237,146 @@ int main() {
 }
 ```
 
+# MultiProgress
+
+`indicators` supports management of multiple progress bars with the `MultiProgress` class template. 
+
+`template <typename Indicator, size_t count> class MultiProgress` is a class template that holds references to multiple progress bars and provides a safe interface to update the state of each bar. `MultiProgress` works with both `ProgressBar` and `BlockProgressBar` classes.
+
+Below is an example `MultiProgress` object that manages three `ProgressBar` objects.
+
+<p align="center">
+  <img src="img/multi_progress.gif"/>  
+</p>
+
+```cpp
+#include <indicators/multi_progress.hpp>
+#include <indicators/progress_bar.hpp>
+
+int main() {
+  using namespace indicators;
+  // Configure first progress bar
+  ProgressBar bar1{
+    option::BarWidth{50},
+    option::Start{"["},
+    option::Fill{"■"},
+    option::Lead{"■"},
+    option::Remainder{" "},
+    option::End{" ]"},
+    option::ForegroundColor{Color::YELLOW},
+    option::ShowElapsedTime{true},
+    option::ShowRemainingTime{true},
+    option::PrefixText{"Progress Bar #1 "}
+  };
+
+  // Configure second progress bar
+
+  ProgressBar bar1{
+    option::BarWidth{50},
+    option::Start{"["},
+    option::Fill{"="},
+    option::Lead{">"},
+    option::Remainder{" "},
+    option::End{" ]"},
+    option::ForegroundColor{Color::CYAN},
+    option::ShowElapsedTime{true},
+    option::ShowRemainingTime{true},
+    option::PrefixText{"Progress Bar #2 "}
+  };
+  
+  // Configure third progress bar
+  indicators::ProgressBar bar3{
+    option::BarWidth{50},
+    option::Start{"["},
+    option::Fill{"#"},
+    option::Lead{"#"},
+    option::Remainder{" "},
+    option::End{" ]"},
+    option::ForegroundColor{Color::RED},
+    option::ShowElapsedTime{true},
+    option::ShowRemainingTime{true},
+    option::PrefixText{"Progress Bar #3 "}
+  };
+
+  // Construct MultiProgress object
+  indicators::MultiProgress<indicators::ProgressBar, 3> bars(bar1, bar2, bar3);
+
+  std::cout << "Multiple Progress Bars:\n";
+
+  auto job1 = [&bars]() {
+    while (true) {
+      bars.tick<0>();
+      if (bars.is_completed<0>())
+        break;
+      std::this_thread::sleep_for(std::chrono::milliseconds(100));
+    }
+  };
+
+  auto job2 = [&bars]() {
+    while (true) {
+      bars.tick<1>();
+      if (bars.is_completed<1>())
+        break;
+      std::this_thread::sleep_for(std::chrono::milliseconds(200));
+    }
+  };
+
+  auto job3 = [&bars]() {
+    while (true) {
+      bars.tick<2>();
+      if (bars.is_completed<2>())
+        break;
+      std::this_thread::sleep_for(std::chrono::milliseconds(60));
+    }
+  };
+
+  std::thread first_job(job1);
+  std::thread second_job(job2);
+  std::thread third_job(job3);
+
+  first_job.join();
+  second_job.join();
+  third_job.join();
+
+  return 0;
+}
+```
+
 # Progress Spinner
 
-To introduce a progress spinner in your application, include `indicators/progress_spinner.hpp` and create a `ProgressSpinner` object. 
-
-```cpp
-#include <indicators/progress_spinner.hpp>
-
-int main() {
-  indicators::ProgressSpinner spinner;
-  return 0;
-}
-```
-
-Here's the general structure of a progress spinner:
+To introduce a progress spinner in your application, include `indicators/progress_spinner.hpp` and create a `ProgressSpinner` object. Here's the general structure of a progress spinner:
 
 ```
-<prefix_text> <spinner> <progress_percentage>? <postfix_text>
-```
-
-Each of these elements (and more) can be configured using the ProgressSpinner API. Here's an example configuration:
-
-```cpp
-#include <indicators/progress_spinner.hpp>
-
-int main() {
-  indicators::ProgressSpinner spinner;
-  
-  // Configure the spinner
-  spinner.set_prefix_text("  ");
-  spinner.set_postfix_text("Checking credentials");
-  spinner.set_foreground_color(indicators::Color::YELLOW);
-  spinner.set_spinner_states({"⠈", "⠐", "⠠", "⢀", "⡀", "⠄", "⠂", "⠁"});
-  
-  // Update spinner state
-
-  return 0;
-}
+{prefix} {spinner} {percentage} [{elapsed}<{remaining}] {postfix}
 ```
 
 ProgressSpinner has a vector of strings: `spinner_states`. At each update, the spinner will pick the next string from this sequence to print to the console. The spinner state can be updated similarly to ProgressBars: Using either `tick()` or `set_progress(value)`. 
 
+<p align="center">
+  <img src="img/progress_spinner.gif"/>  
+</p>
+
 ```cpp
 #include <indicators/progress_spinner.hpp>
 
 int main() {
-  indicators::ProgressSpinner spinner;
-  
-  // Configure the spinner
-  spinner.set_postfix_text("Checking credentials");
-  spinner.set_foreground_color(indicators::Color::YELLOW);
-  spinner.set_spinner_states({"⠈", "⠐", "⠠", "⢀", "⡀", "⠄", "⠂", "⠁"});
-  
+  using namespace indicators;
+  indicators::ProgressSpinner spinner{
+    option::PostfixText{"Checking credentials"},
+    option::ForegroundColor{Color::YELLOW},
+    option::SpinnerStates{std::vector<std::string>{"⠈", "⠐", "⠠", "⢀", "⡀", "⠄", "⠂", "⠁"}}
+  };
+ 
   // Update spinner state
   auto job = [&spinner]() {
     while (true) {
       if (spinner.is_completed()) {
-        spinner.set_foreground_color(indicators::Color::GREEN);
-        spinner.set_prefix_text("✔");
-        spinner.hide_spinner();
-        spinner.hide_percentage();
-        spinner.set_postfix_text("Authenticated!");
-        spinner.mark_as_completed();
+        spinner.set_option(option::ForegroundColor{Color::GREEN});
+        spinner.set_option(option::PrefixText{"✔"});
+        spinner.set_option(option::ShowSpinner{false});
+        spinner.set_option(option::ShowPercentage{false});
+        spinner.set_option(option::PostfixText{"Authenticated!"});
+        spinner.mark_as_completed();	
         break;
       } else
         spinner.tick();

clang-format.bash

@@ -1,2 +1,2 @@
 #!/usr/bin/env bash
-find ./include ./demo/ -type f \( -iname \*.cpp -o -iname \*.hpp \) | xargs clang-format -style="{ColumnLimit : 100}" -i
+find ./include ./demo/ ./samples/ -type f \( -iname \*.cpp -o -iname \*.hpp \) | xargs clang-format -style="{ColumnLimit : 100}" -i

demo/CMakeLists.txt

@@ -0,0 +1,2 @@
+add_executable(demo demo.cpp)
+target_link_libraries(demo PRIVATE indicators::indicators)

demo/demo.cpp

@@ -6,19 +6,18 @@ int main() {
 
   // Hide cursor
   std::cout << "\e[?25l";
-
+  using namespace indicators;
   {
     //
     // PROGRESS BAR 1
     //
-    indicators::ProgressBar p;
-    p.set_bar_width(50);
-    p.start_bar_with("[");
-    p.fill_bar_progress_with("■");
-    p.lead_bar_progress_with("■");
-    p.fill_bar_remainder_with(" ");
-    p.end_bar_with(" ]");
-    p.set_foreground_color(indicators::Color::YELLOW);
+    indicators::ProgressBar p{option::BarWidth{50},
+                              option::Start{"["},
+                              option::Fill{"■"},
+                              option::Lead{"■"},
+                              option::Remainder{" "},
+                              option::End{" ]"},
+                              option::ForegroundColor{indicators::Color::YELLOW}};
 
     std::atomic<size_t> index{0};
     std::vector<std::string> status_text = {"Rocket.exe is not responding",
@@ -35,7 +34,7 @@ int main() {
       while (true) {
         if (p.is_completed())
           break;
-        p.set_postfix_text(status_text[index % status_text.size()]);
+        p.set_option(option::PostfixText{status_text[index % status_text.size()]});
         p.set_progress(index * 10);
         index += 1;
         std::this_thread::sleep_for(std::chrono::milliseconds(600));
@@ -50,20 +49,20 @@ int main() {
     // PROGRESS BAR 2
     //
     indicators::ProgressBar p;
-    p.set_bar_width(40);
-    p.set_prefix_text("Reading package list... ");
-    p.start_bar_with("");
-    p.fill_bar_progress_with("");
-    p.lead_bar_progress_with("");
-    p.fill_bar_remainder_with("");
-    p.end_bar_with("");
-    p.set_foreground_color(indicators::Color::WHITE);
-    p.hide_percentage();
+    p.set_option(option::BarWidth{40});
+    p.set_option(option::PrefixText{"Reading package list... "});
+    p.set_option(option::Start{""});
+    p.set_option(option::Fill{""});
+    p.set_option(option::Lead{""});
+    p.set_option(option::Remainder{""});
+    p.set_option(option::End{""});
+    p.set_option(option::ForegroundColor{indicators::Color::WHITE});
+    p.set_option(option::ShowPercentage{false});
     auto job = [&p]() {
       while (true) {
-        p.set_prefix_text("Reading package list... " + std::to_string(p.current()) + "% ");
+        p.set_option(option::PrefixText{"Reading package list... " + std::to_string(p.current()) + "% "});
         if (p.current() + 2 >= 100)
-          p.set_prefix_text("Reading package list... Done");
+          p.set_option(option::PrefixText{"Reading package list... Done"});
         p.tick();
         if (p.is_completed()) {
           break;
@@ -80,25 +79,25 @@ int main() {
     // PROGRESS BAR 3
     //
     indicators::ProgressBar p;
-    p.set_bar_width(50);
-    p.start_bar_with("[");
-    p.fill_bar_progress_with("=");
-    p.lead_bar_progress_with(">");
-    p.fill_bar_remainder_with(" ");
-    p.end_bar_with("]");
-    p.set_postfix_text("Getting started");
-    p.set_foreground_color(indicators::Color::GREEN);
+    p.set_option(option::BarWidth{50});
+    p.set_option(option::Start{"["});
+    p.set_option(option::Fill{"="});
+    p.set_option(option::Lead{">"});
+    p.set_option(option::Remainder{" "});
+    p.set_option(option::End{"]"});
+    p.set_option(option::PostfixText{"Getting started"});
+    p.set_option(option::ForegroundColor{indicators::Color::GREEN});
     auto job = [&p]() {
       while (true) {
         auto ticks = p.current();
         if (ticks > 20 && ticks < 50)
-          p.set_postfix_text("Delaying the inevitable");
+          p.set_option(option::PostfixText{"Delaying the inevitable"});
         else if (ticks > 50 && ticks < 80)
-          p.set_postfix_text("Crying quietly");
+          p.set_option(option::PostfixText{"Crying quietly"});
         else if (ticks > 80 && ticks < 98)
-          p.set_postfix_text("Almost there");
+          p.set_option(option::PostfixText{"Almost there"});
         else if (ticks >= 98)
-          p.set_postfix_text("Done");
+          p.set_option(option::PostfixText{"Done"});
         p.tick();
         if (p.is_completed())
           break;
@@ -115,32 +114,31 @@ int main() {
     //
     std::vector<std::string> lead_spinner{"⠋", "⠙", "⠹", "⠸", "⠼", "⠴", "⠦", "⠧", "⠇", "⠏"};
     indicators::ProgressBar p4;
-    p4.set_bar_width(40);
-    p4.start_bar_with("");
-    p4.fill_bar_progress_with("⠸");
-    p4.lead_bar_progress_with("");
-    p4.fill_bar_remainder_with(" ");
-    p4.end_bar_with("");
-    p4.set_foreground_color(indicators::Color::CYAN);
-    p4.set_postfix_text("Restoring system state");
-    p4.hide_percentage();
+    p4.set_option(option::BarWidth{40});
+    p4.set_option(option::Start{""});
+    p4.set_option(option::Fill{"⠸"});
+    p4.set_option(option::Lead{""});
+    p4.set_option(option::Remainder{" "});
+    p4.set_option(option::End{""});
+    p4.set_option(option::ForegroundColor{indicators::Color::CYAN});
+    p4.set_option(option::PostfixText{"Restoring system state"});
+    p4.set_option(option::ShowPercentage{false});
     std::atomic<size_t> index4{0};
     auto job4 = [&p4, &index4, &lead_spinner]() {
       while (true) {
-        p4.set_prefix_text("{ " + std::to_string(p4.current()) + "% } ");
-        p4.lead_bar_progress_with(lead_spinner[index4 % lead_spinner.size()]);
+        p4.set_option(option::PrefixText{"{ " + std::to_string(p4.current()) + "% } "});
+        p4.set_option(option::Lead{lead_spinner[index4 % lead_spinner.size()]});
         index4 += 1;
         if (p4.current() + 2 >= 100) {
           std::cout << std::endl;
-          p4.set_foreground_color(indicators::Color::RED);
-          p4.set_prefix_text("{ ERROR }");
-          p4.start_bar_with("");
-          p4.fill_bar_progress_with("");
-          p4.lead_bar_progress_with("");
-          p4.fill_bar_remainder_with("");
-          p4.end_bar_with("");
-          p4.show_percentage();
-          p4.set_postfix_text("Failed to restore system");
+          p4.set_option(option::ForegroundColor{indicators::Color::RED});
+          p4.set_option(option::PrefixText{"{ ERROR }"});
+          p4.set_option(option::Start{});
+          p4.set_option(option::Fill{});
+          p4.set_option(option::Lead{});
+          p4.set_option(option::Remainder{});
+          p4.set_option(option::ShowPercentage{true});
+          p4.set_option(option::PostfixText{"Failed to restore system"});
           p4.mark_as_completed();
           break;
         }
@@ -157,23 +155,24 @@ int main() {
       //
       // GOING BACKWARDS
       //
-      indicators::ProgressBar p;
-      p.set_bar_width(50);
-      p.start_bar_with("[");
-      p.fill_bar_progress_with("■");
-      p.lead_bar_progress_with("■");
-      p.fill_bar_remainder_with("-");
-      p.end_bar_with("]");
-      p.set_progress(100);
-      p.set_foreground_color(indicators::Color::WHITE);
-      p.set_postfix_text("Reverting system restore");
+      indicators::ProgressBar p{
+          option::BarWidth {50},
+          option::Start{"["},
+          option::Fill{"■"},
+          option::Lead{"■"},
+          option::Remainder{"-"},
+          option::End{"]"},
+          option::ForegroundColor{indicators::Color::WHITE},
+          option::PostfixText{"Reverting system restore"}
+      };
+      p.set_progress(100); // TODO backwards as an option?
       std::atomic<size_t> progress{100};
       auto job = [&p, &progress]() {
         while (true) {
           progress -= 1;
           p.set_progress(progress);
           if (progress == 0) {
-            p.set_postfix_text("Revert complete!");
+            p.set_option(option::PostfixText{"Revert complete!"});
             p.mark_as_completed();
             break;
           }
@@ -189,19 +188,21 @@ int main() {
     //
     // PROGRESS BAR 5
     //
-    indicators::ProgressSpinner p;
-    p.set_prefix_text("");
-    p.set_postfix_text("Checking credentials");
-    p.set_foreground_color(indicators::Color::YELLOW);
-    p.set_spinner_states({"⠈", "⠐", "⠠", "⢀", "⡀", "⠄", "⠂", "⠁"});
+    indicators::ProgressSpinner p{
+      option::PrefixText{""},
+      option::PostfixText{"Checking credentials"},
+      option::ForegroundColor{indicators::Color::YELLOW},
+      option::SpinnerStates{std::vector<std::string>{"⠈", "⠐", "⠠", "⢀", "⡀", "⠄", "⠂", "⠁"}}
+    };
+
     auto job = [&p]() {
       while (true) {
         if (p.is_completed()) {
-          p.set_foreground_color(indicators::Color::GREEN);
-          p.set_prefix_text("✔");
-          p.hide_spinner();
-          p.hide_percentage();
-          p.set_postfix_text("Authenticated!");
+          p.set_option(option::ForegroundColor{indicators::Color::GREEN});
+          p.set_option(option::PrefixText{"✔"});
+          p.set_option(option::ShowSpinner{false});
+          p.set_option(option::ShowPercentage{false});
+          p.set_option(option::PostfixText{"Authenticated!"});
           p.mark_as_completed();
           break;
         } else
@@ -218,70 +219,72 @@ int main() {
     //
     // PROGRESS BAR 6
     //
-    indicators::ProgressSpinner p;
-    p.set_prefix_text(" - ");
-    p.set_postfix_text("Searching for the Moon");
-    p.set_foreground_color(indicators::Color::WHITE);
-    p.set_spinner_states({"▖", "▘", "▝", "▗"});
-    p.hide_percentage();
+    indicators::ProgressSpinner p{
+      option::PrefixText{" - "},
+      option::PostfixText{"Searching for the Moon"},
+      option::ForegroundColor{indicators::Color::WHITE},
+      option::ShowPercentage{false},
+      option::SpinnerStates{std::vector<std::string>{"▖", "▘", "▝", "▗"}}
+    };
     auto job = [&p]() {
       while (true) {
         auto current = p.current();
         if (current == 24) {
-          p.set_prefix_text(" - ✔");
-          p.hide_spinner();
+          p.set_option(option::PrefixText{" - ✔"});
+          p.set_option(option::ShowSpinner{false});
         } else if (current == 25) {
           std::cout << std::endl;
-          p.show_spinner();
-          p.set_prefix_text(" - ");
-          p.set_postfix_text("Contacting Kerbal headquarters");
+          p.set_option(option::ShowSpinner{true});
+          p.set_option(option::PrefixText{" - "});
+          p.set_option(option::PostfixText{"Contacting Kerbal headquarters"});
         } else if (current == 49) {
-          p.set_prefix_text(" - ✔");
-          p.hide_spinner();
+          p.set_option(option::PrefixText{" - ✔"});
+          p.set_option(option::ShowSpinner{false});
         } else if (current == 50) {
           std::cout << std::endl;
-          p.show_spinner();
-          p.set_prefix_text(" - ");
-          p.set_postfix_text("Designing spaceship");
+          p.set_option(option::ShowSpinner{true});
+          p.set_option(option::PrefixText{" - "});
+          p.set_option(option::PostfixText{"Designing spaceship"});
         } else if (current == 74) {
-          p.set_prefix_text(" - ✔");
-          p.hide_spinner();
+          p.set_option(option::PrefixText{" - ✔"});
+          p.set_option(option::ShowSpinner{false});
         } else if (current == 75) {
           std::cout << std::endl;
-          p.show_spinner();
-          p.set_prefix_text(" - ");
-          p.set_postfix_text("Launching rocket");
+          p.set_option(option::ShowSpinner{true});
+          p.set_option(option::PrefixText{" - "});
+          p.set_option(option::PostfixText{"Launching rocket"});
         } else if (current == 95) {
-          p.set_prefix_text(" - ✔");
-          p.hide_spinner();
+          p.set_option(option::PrefixText{" - ✔"});
+          p.set_option(option::ShowSpinner{false});
         } else if (current == 99) {
           std::cout << std::endl;
           //
           // NESTED PROGRESS BAR
           //
-          indicators::ProgressBar p2;
-          p2.set_bar_width(30);
-          p2.set_prefix_text(" - ");
-          p2.start_bar_with("🌎");
-          p2.fill_bar_progress_with("·");
-          p2.lead_bar_progress_with("🚀");
-          p2.fill_bar_remainder_with(" ");
-          p2.end_bar_with("🌑");
-          p2.set_postfix_text("Achieved low-Earth orbit");
-          p2.set_foreground_color(indicators::Color::WHITE);
+          indicators::ProgressBar p2{
+              option::BarWidth{30},
+              option::PrefixText{" - "},
+              option::Start{"🌎"},
+              option::Fill{"·"},
+              option::Lead{"🚀"},
+              option::Remainder{" "},
+              option::End{"🌑"},
+              option::PostfixText{"Achieved low-Earth orbit"},
+              option::ForegroundColor{indicators::Color::WHITE}
+          };
           std::vector<std::string> ship_trail{"⠁", "⠂", "⠄", "⡀", "⢀", "⠠", "⠐", "⠈"};
           std::atomic<int> ship_trail_index{0};
           auto job2 = [&p2, &ship_trail_index, &ship_trail]() {
             while (true) {
               auto ticks = p2.current();
               if (ticks > 20 && ticks < 50)
-                p2.set_postfix_text("Switching to trans-lunar trajectory");
+                p2.set_option(option::PostfixText{"Switching to trans-lunar trajectory"});
               else if (ticks > 50 && ticks < 80)
-                p2.set_postfix_text("Transferred to Lunar lander");
+                p2.set_option(option::PostfixText{"Transferred to Lunar lander"});
               else if (ticks > 80 && ticks < 98)
-                p2.set_postfix_text("Almost there");
+                p2.set_option(option::PostfixText{"Almost there"});
               else if (ticks >= 98)
-                p2.set_postfix_text("Landed on the Moon");
+                p2.set_option(option::PostfixText{"Landed on the Moon"});
               p2.tick();
               ship_trail_index += 1;
               if (p2.is_completed())
@@ -291,7 +294,7 @@ int main() {
           };
           std::thread thread2(job2);
           thread2.join();
-          p.set_postfix_text("Mission successful!");
+          p.set_option(indicators::option::PostfixText{"Mission successful!"});
           p.mark_as_completed();
           break;
         }

include/indicators/block_progress_bar.hpp

@@ -25,157 +25,198 @@ OUT OF OR IN CONNECTION WITH THE SOFTWARE  OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
 */
 #pragma once
+
+#include <indicators/color.hpp>
+#include <indicators/details/stream_helper.hpp>
+
+#define NOMINMAX
 #include <algorithm>
 #include <atomic>
-#include <indicators/color.hpp>
+#include <chrono>
+#include <iomanip>
 #include <iostream>
 #include <mutex>
 #include <string>
+#include <tuple>
 #include <thread>
-#include <vector>
-#include <cmath>
+#include "setting.hpp"
 
 namespace indicators {
 
 class BlockProgressBar {
+  using Settings = std::tuple<
+      option::ForegroundColor,
+      option::BarWidth,
+      option::Start,
+      option::End,
+      option::PrefixText,
+      option::PostfixText,
+      option::ShowPercentage,
+      option::ShowElapsedTime,
+      option::ShowRemainingTime,
+      option::Completed,
+      option::SavedStartTime,
+      option::MaxPostfixTextLen>;
 public:
-  void set_foreground_color(Color color) {
-    std::unique_lock<std::mutex> lock{_mutex};
-    _foreground_color = color;
+  template <typename... Args, typename std::enable_if<details::are_settings_from_tuple<Settings, typename std::decay<Args>::type...>::value, void*>::type = nullptr>
+  explicit BlockProgressBar(Args&&... args) : settings_(
+      details::get<details::ProgressBarOption::foreground_color>(option::ForegroundColor{Color::WHITE}, std::forward<Args>(args)...),
+      details::get<details::ProgressBarOption::bar_width>(option::BarWidth{100}, std::forward<Args>(args)...),
+      details::get<details::ProgressBarOption::start>(option::Start{"["}, std::forward<Args>(args)...),
+      details::get<details::ProgressBarOption::end>(option::End{"]"}, std::forward<Args>(args)...),
+      details::get<details::ProgressBarOption::prefix_text>(option::PrefixText{""}, std::forward<Args>(args)...),
+      details::get<details::ProgressBarOption::postfix_text>(option::PostfixText{""}, std::forward<Args>(args)...),
+      details::get<details::ProgressBarOption::show_percentage>(option::ShowPercentage{true}, std::forward<Args>(args)...),
+      details::get<details::ProgressBarOption::show_elapsed_time>(option::ShowElapsedTime{false}, std::forward<Args>(args)...),
+      details::get<details::ProgressBarOption::show_remaining_time>(option::ShowRemainingTime{false}, std::forward<Args>(args)...),
+      details::get<details::ProgressBarOption::completed>(option::Completed{false}, std::forward<Args>(args)...),
+      details::get<details::ProgressBarOption::saved_start_time>(option::SavedStartTime{false}, std::forward<Args>(args)...),
+      details::get<details::ProgressBarOption::max_postfix_text_len>(option::MaxPostfixTextLen{0}, std::forward<Args>(args)...)
+      ) {}
+
+  template <typename T, details::ProgressBarOption id>
+  void set_option(details::Setting<T, id>&& setting){
+    static_assert(!std::is_same<T, typename std::decay<decltype(details::get_value<id>(std::declval<Settings>()))>::type>::value, "Setting has wrong type!");
+    std::lock_guard<std::mutex> lock(_mutex);
+    get_value<id>() = std::move(setting).value;
   }
 
-  void set_bar_width(size_t bar_width) {
-    std::unique_lock<std::mutex> lock{_mutex};
-    _bar_width = bar_width;
+  template <typename T, details::ProgressBarOption id>
+  void set_option(const details::Setting<T, id>& setting){
+    static_assert(!std::is_same<T, typename std::decay<decltype(details::get_value<id>(std::declval<Settings>()))>::type>::value, "Setting has wrong type!");
+    std::lock_guard<std::mutex> lock(_mutex);
+    get_value<id>() = setting.value;
   }
 
-  void start_bar_with(const std::string &start) {
-    std::unique_lock<std::mutex> lock{_mutex};
-    _start = start;
+  void set_option(const details::Setting<std::string, details::ProgressBarOption::postfix_text>& setting){
+    std::lock_guard<std::mutex> lock(_mutex);
+    get_value<details::ProgressBarOption::postfix_text>() = setting.value;
+    if(setting.value.length() > get_value<details::ProgressBarOption::max_postfix_text_len>()){
+      get_value<details::ProgressBarOption::max_postfix_text_len>() = setting.value.length();
+    }
   }
 
-  void end_bar_with(const std::string &end) {
-    std::unique_lock<std::mutex> lock{_mutex};
-    _end = end;
+  void set_option(details::Setting<std::string, details::ProgressBarOption::postfix_text>&& setting){
+    std::lock_guard<std::mutex> lock(_mutex);
+    get_value<details::ProgressBarOption::postfix_text>() = std::move(setting).value;
+    auto& new_value = get_value<details::ProgressBarOption::postfix_text>();
+    if(new_value.length() > get_value<details::ProgressBarOption::max_postfix_text_len>()){
+      get_value<details::ProgressBarOption::max_postfix_text_len>() = new_value.length();
+    }
   }
 
-  void set_prefix_text(const std::string &text) {
-    std::unique_lock<std::mutex> lock{_mutex};
-    _prefix_text = text;
-  }
-
-  void set_postfix_text(const std::string &text) {
-    std::unique_lock<std::mutex> lock{_mutex};
-    _postfix_text = text;
-    if (_postfix_text.length() > _max_postfix_text_length)
-      _max_postfix_text_length = _postfix_text.length();
-  }
-
-  void show_percentage() { _show_percentage = true; }
-
-  void hide_percentage() { _show_percentage = false; }
-
   void set_progress(float value) {
     {
-      std::unique_lock<std::mutex> lock{_mutex};
+      std::lock_guard<std::mutex> lock{_mutex};
       _progress = value;
     }
+    _save_start_time();
     _print_progress();
   }
 
   void tick() {
     {
-      std::unique_lock<std::mutex> lock{_mutex};
+      std::lock_guard<std::mutex> lock{_mutex};
       _progress += 1;
     }
+    _save_start_time();
     _print_progress();
   }
 
   size_t current() {
+    std::lock_guard<std::mutex> lock{_mutex};
     return std::min(static_cast<size_t>(_progress), size_t(100));
   }
 
-  bool is_completed() const { return _completed; }
+  bool is_completed() const { return get_value<details::ProgressBarOption::completed>(); }
 
   void mark_as_completed() {
-    _completed = true;
+    get_value<details::ProgressBarOption::completed>() = true;
     _print_progress();
   }
 
 private:
+
+  template <details::ProgressBarOption id>
+  auto get_value() -> decltype((details::get_value<id>(std::declval<Settings&>()).value)) {
+    return details::get_value<id>(settings_).value;
+  }
+
+  template <details::ProgressBarOption id>
+  auto get_value() const -> decltype((details::get_value<id>(std::declval<const Settings&>()).value)) {
+    return details::get_value<id>(settings_).value;
+  }
+
+  Settings settings_;
   float _progress{0.0};
-  size_t _bar_width{100};
-  std::string _prefix_text{""};
-  std::string _start{"["};
-  std::string _fill{"█"};
-  std::string _lead{" "};
-  std::string _remainder{" "};
-  std::string _end{"]"};
-  std::string _postfix_text{""};
-  std::atomic<size_t> _max_postfix_text_length{0};
-  std::atomic<bool> _completed{false};
-  std::atomic<bool> _show_percentage{true};
+  std::chrono::time_point<std::chrono::high_resolution_clock> _start_time_point;
   std::mutex _mutex;
-  Color _foreground_color;
 
-  void _print_progress() {
-    std::unique_lock<std::mutex> lock{_mutex};
-    std::cout << termcolor::bold;
-    switch (_foreground_color) {
-    case Color::GREY:
-      std::cout << termcolor::grey;
-      break;
-    case Color::RED:
-      std::cout << termcolor::red;
-      break;
-    case Color::GREEN:
-      std::cout << termcolor::green;
-      break;
-    case Color::YELLOW:
-      std::cout << termcolor::yellow;
-      break;
-    case Color::BLUE:
-      std::cout << termcolor::blue;
-      break;
-    case Color::MAGENTA:
-      std::cout << termcolor::magenta;
-      break;
-    case Color::CYAN:
-      std::cout << termcolor::cyan;
-      break;
-    case Color::WHITE:
-      std::cout << termcolor::white;
-      break;
+  template <typename Indicator, size_t count> friend class MultiProgress;
+  std::atomic<bool> _multi_progress_mode{false};
+
+  void _save_start_time() {
+    auto& show_elapsed_time = get_value<details::ProgressBarOption::show_elapsed_time>();
+    auto& saved_start_time = get_value<details::ProgressBarOption::saved_start_time>();
+    auto& show_remaining_time = get_value<details::ProgressBarOption::show_remaining_time>();
+    if ((show_elapsed_time || show_remaining_time) && !saved_start_time) {
+      _start_time_point = std::chrono::high_resolution_clock::now();
+      saved_start_time = true;
     }
-    std::cout << _prefix_text;
-    std::cout << _start;
+  }
 
-    std::vector<std::string> lead_characters{" ", "▏", "▎", "▍", "▌", "▋", "▊", "▉"};
-    auto progress = std::min(1.0f, std::max(0.0f, _progress / 100.0f));
-    auto whole_width = std::floor(progress * _bar_width);
-    auto remainder_width = fmod((progress * _bar_width), 1.0f);
-    auto part_width = std::floor(remainder_width * lead_characters.size());
-    _lead = lead_characters[part_width];
-    if ((_bar_width - whole_width - 1) < 0)
-      _lead = "";
-    for (size_t i = 0; i < whole_width; ++i)
-      std::cout << _fill;
-    std::cout << _lead;
-    for (size_t i = 0; i < (_bar_width - whole_width - 1); ++i)
-      std::cout << " ";
-    
-    std::cout << _end;
-    if (_show_percentage) {
+  void _print_progress(bool from_multi_progress = false) {
+    if (_multi_progress_mode && !from_multi_progress) {
+      if (_progress > 100.0) {
+        get_value<details::ProgressBarOption::completed>() = true;
+      }
+      return;
+    }
+    std::lock_guard<std::mutex> lock{_mutex};
+    auto now = std::chrono::high_resolution_clock::now();
+    auto elapsed = std::chrono::duration_cast<std::chrono::nanoseconds>(now - _start_time_point);
+
+    std::cout << termcolor::bold;
+    details::set_stream_color(std::cout, get_value<details::ProgressBarOption::foreground_color>());
+    std::cout << get_value<details::ProgressBarOption::prefix_text>();
+    std::cout << get_value<details::ProgressBarOption::start>();
+
+    details::BlockProgressScaleWriter writer{std::cout, get_value<details::ProgressBarOption::bar_width>()};
+    writer.write(_progress);
+
+    std::cout << get_value<details::ProgressBarOption::end>();
+    if (get_value<details::ProgressBarOption::show_percentage>()) {
       std::cout << " " << std::min(static_cast<size_t>(_progress), size_t(100)) << "%";
     }
-    if (_max_postfix_text_length == 0)
-      _max_postfix_text_length = 10;
-    std::cout << " " << _postfix_text << std::string(_max_postfix_text_length, ' ') << "\r";
+
+    if (get_value<details::ProgressBarOption::show_elapsed_time>()) {
+      std::cout << " [";
+      details::write_duration(std::cout, elapsed);
+    }
+
+    if (get_value<details::ProgressBarOption::show_remaining_time>()) {
+      if (get_value<details::ProgressBarOption::show_elapsed_time>())
+        std::cout << "<";
+      else
+        std::cout << " [";
+      auto eta = std::chrono::nanoseconds(
+          _progress > 0 ? static_cast<long long>(elapsed.count() * 100 / _progress) : 0);
+      auto remaining = eta > elapsed ? (eta - elapsed) : (elapsed - eta);
+      details::write_duration(std::cout, remaining);
+      std::cout << "]";
+    } else {
+      if (get_value<details::ProgressBarOption::show_elapsed_time>())
+        std::cout << "]";
+    }
+
+    if (get_value<details::ProgressBarOption::max_postfix_text_len>() == 0)
+      get_value<details::ProgressBarOption::max_postfix_text_len>() = 10;
+    std::cout << " " << get_value<details::ProgressBarOption::postfix_text>() << std::string(get_value<details::ProgressBarOption::max_postfix_text_len>(), ' ') << "\r";
     std::cout.flush();
     if (_progress > 100.0) {
-      _completed = true;
+      get_value<details::ProgressBarOption::completed>() = true;
     }
-    if (_completed)
+    if (get_value<details::ProgressBarOption::completed>() && !from_multi_progress) // Don't std::endl if calling from MultiProgress
       std::cout << termcolor::reset << std::endl;
   }
 };

include/indicators/details/stream_helper.hpp

@@ -0,0 +1,139 @@
+#pragma once
+
+#include <indicators/color.hpp>
+#include <indicators/termcolor.hpp>
+
+#include <algorithm>
+#include <chrono>
+#include <iomanip>
+#include <ostream>
+#include <string>
+#include <vector>
+
+#include <cassert>
+#include <cmath>
+
+namespace indicators {
+namespace details {
+
+inline void set_stream_color(std::ostream &os, Color color) {
+    switch (color) {
+        case Color::GREY:
+            os << termcolor::grey;
+            break;
+        case Color::RED:
+            os << termcolor::red;
+            break;
+        case Color::GREEN:
+            os << termcolor::green;
+            break;
+        case Color::YELLOW:
+            os << termcolor::yellow;
+            break;
+        case Color::BLUE:
+            os << termcolor::blue;
+            break;
+        case Color::MAGENTA:
+            os << termcolor::magenta;
+            break;
+        case Color::CYAN:
+            os << termcolor::cyan;
+            break;
+        case Color::WHITE:
+            os << termcolor::white;
+            break;
+        default:
+            assert(false);
+    }
+}
+
+inline std::ostream &write_duration(std::ostream &os, std::chrono::nanoseconds ns) {
+    using namespace std;
+    using namespace std::chrono;
+    using days = duration<int, ratio<86400>>;
+    char fill = os.fill();
+    os.fill('0');
+    auto d = duration_cast<days>(ns);
+    ns -= d;
+    auto h = duration_cast<hours>(ns);
+    ns -= h;
+    auto m = duration_cast<minutes>(ns);
+    ns -= m;
+    auto s = duration_cast<seconds>(ns);
+    if (d.count() > 0)
+        os << setw(2) << d.count() << "d:";
+    if (h.count() > 0)
+        os << setw(2) << h.count() << "h:";
+    os << setw(2) << m.count() << "m:" << setw(2) << s.count() << 's';
+    os.fill(fill);
+    return os;
+}
+
+class BlockProgressScaleWriter
+{
+public:
+    BlockProgressScaleWriter(std::ostream& os, size_t bar_width)
+        : os(os)
+        , bar_width(bar_width)
+    {}
+
+    std::ostream &write(float progress) {
+        std::string fill_text{"█"};
+        std::vector<std::string> lead_characters{" ", "▏", "▎", "▍", "▌", "▋", "▊", "▉"};
+        auto value = std::min(1.0f, std::max(0.0f, progress / 100.0f));
+        auto whole_width = std::floor(value * bar_width);
+        auto remainder_width = fmod((value * bar_width), 1.0f);
+        auto part_width = std::floor(remainder_width * lead_characters.size());
+        std::string lead_text = lead_characters[size_t(part_width)];
+        if ((bar_width - whole_width - 1) < 0)
+        lead_text = "";
+        for (size_t i = 0; i < whole_width; ++i)
+        os << fill_text;
+        os << lead_text;
+        for (size_t i = 0; i < (bar_width - whole_width - 1); ++i)
+        os << " ";
+        return os;
+    }
+private:
+    std::ostream& os;
+    size_t bar_width = 0;
+};
+
+class ProgressScaleWriter
+{
+public:
+    ProgressScaleWriter(std::ostream& os,
+                        size_t bar_width,
+                        const std::string& fill,
+                        const std::string& lead,
+                        const std::string& remainder)
+        : os(os)
+        , bar_width(bar_width)
+        , fill(fill)
+        , lead(lead)
+        , remainder(remainder)
+        {}
+
+    std::ostream &write(float progress) {
+        auto pos = static_cast<size_t>(progress * static_cast<float>(bar_width) / 100.0);
+        for (size_t i = 0; i < bar_width; ++i) {
+        if (i < pos)
+            os << fill;
+        else if (i == pos)
+            os << lead;
+        else
+            os << remainder;
+        }
+        return os;
+    }
+
+private:
+    std::ostream& os;
+    size_t bar_width = 0;
+    std::string fill;
+    std::string lead;
+    std::string remainder;
+};
+
+}
+}

include/indicators/multi_progress.hpp

@@ -0,0 +1,94 @@
+/*
+Activity Indicators for Modern C++
+https://github.com/p-ranav/indicators
+
+Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
+Copyright (c) 2019 Pranav Srinivas Kumar <pranav.srinivas.kumar@gmail.com>.
+
+Permission is hereby  granted, free of charge, to any  person obtaining a copy
+of this software and associated  documentation files (the "Software"), to deal
+in the Software  without restriction, including without  limitation the rights
+to  use, copy,  modify, merge,  publish, distribute,  sublicense, and/or  sell
+copies  of  the Software,  and  to  permit persons  to  whom  the Software  is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE  IS PROVIDED "AS  IS", WITHOUT WARRANTY  OF ANY KIND,  EXPRESS OR
+IMPLIED,  INCLUDING BUT  NOT  LIMITED TO  THE  WARRANTIES OF  MERCHANTABILITY,
+FITNESS FOR  A PARTICULAR PURPOSE AND  NONINFRINGEMENT. IN NO EVENT  SHALL THE
+AUTHORS  OR COPYRIGHT  HOLDERS  BE  LIABLE FOR  ANY  CLAIM,  DAMAGES OR  OTHER
+LIABILITY, WHETHER IN AN ACTION OF  CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE  OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+*/
+#pragma once
+#include <atomic>
+#include <functional>
+#include <indicators/color.hpp>
+#include <iostream>
+#include <mutex>
+#include <vector>
+
+namespace indicators {
+
+template <typename Indicator, size_t count> class MultiProgress {
+public:
+  template <typename... Indicators,
+            typename = typename std::enable_if<(sizeof...(Indicators) == count)>::type>
+  explicit MultiProgress(Indicators &... bars) {
+    _bars = {bars...};
+    for (auto &bar : _bars) {
+      bar.get()._multi_progress_mode = true;
+    }
+  }
+
+  template <size_t index>
+  typename std::enable_if<(index >= 0 && index < count), void>::type set_progress(float value) {
+    if (!_bars[index].get().is_completed())
+      _bars[index].get().set_progress(value);
+    _print_progress();
+  }
+
+  template <size_t index>
+  typename std::enable_if<(index >= 0 && index < count), void>::type tick() {
+    if (!_bars[index].get().is_completed())
+      _bars[index].get().tick();
+    _print_progress();
+  }
+
+  template <size_t index>
+  typename std::enable_if<(index >= 0 && index < count), bool>::type is_completed() const {
+    return _bars[index].get().is_completed();
+  }
+
+private:
+  std::atomic<bool> _started{false};
+  std::mutex _mutex;
+  std::vector<std::reference_wrapper<Indicator>> _bars;
+
+  bool _all_completed() {
+    bool result{true};
+    for (size_t i = 0; i < count; ++i)
+      result &= _bars[i].get().is_completed();
+    return result;
+  }
+
+  void _print_progress() {
+    std::lock_guard<std::mutex> lock{_mutex};
+    if (_started)
+      for (size_t i = 0; i < count; ++i)
+        std::cout << "\x1b[A";
+    for (auto &bar : _bars) {
+      bar.get()._print_progress(true);
+      std::cout << "\n";
+    }
+    std::cout << termcolor::reset;
+    if (!_started)
+      _started = true;
+  }
+};
+
+} // namespace indicators

include/indicators/progress_bar.hpp

@@ -25,164 +25,218 @@ OUT OF OR IN CONNECTION WITH THE SOFTWARE  OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
 */
 #pragma once
+
+#include <indicators/details/stream_helper.hpp>
+
+#define NOMINMAX
 #include <algorithm>
 #include <atomic>
+#include <chrono>
+#include <cmath>
 #include <indicators/color.hpp>
+#include <indicators/setting.hpp>
+#include <tuple>
+#include <iomanip>
 #include <iostream>
 #include <mutex>
 #include <string>
 #include <thread>
+#include <tuple>
+#include <type_traits>
 
 namespace indicators {
 
 class ProgressBar {
+  using Settings = std::tuple<
+      option::BarWidth,
+      option::PrefixText,
+      option::PostfixText,
+      option::Start,
+      option::End,
+      option::Fill,
+      option::Lead,
+      option::Remainder,
+      option::MaxPostfixTextLen,
+      option::Completed,
+      option::ShowPercentage,
+      option::ShowElapsedTime,
+      option::ShowRemainingTime,
+      option::SavedStartTime,
+      option::ForegroundColor
+  >;
 public:
-  void set_foreground_color(Color color) {
-    std::unique_lock<std::mutex> lock{_mutex};
-    _foreground_color = color;
+  template <typename... Args, typename std::enable_if<details::are_settings_from_tuple<Settings, typename std::decay<Args>::type...>::value, void*>::type = nullptr>
+  explicit ProgressBar(Args&&... args) :
+    settings_(
+        details::get<details::ProgressBarOption::bar_width>(option::BarWidth{100}, std::forward<Args>(args)...),
+        details::get<details::ProgressBarOption::prefix_text>(option::PrefixText{}, std::forward<Args>(args)...),
+        details::get<details::ProgressBarOption::postfix_text>(option::PostfixText{}, std::forward<Args>(args)...),
+        details::get<details::ProgressBarOption::start>(option::Start{"["}, std::forward<Args>(args)...),
+        details::get<details::ProgressBarOption::end>(option::End{"]"}, std::forward<Args>(args)...),
+        details::get<details::ProgressBarOption::fill>(option::Fill{"="}, std::forward<Args>(args)...),
+        details::get<details::ProgressBarOption::lead>(option::Lead{">"}, std::forward<Args>(args)...),
+        details::get<details::ProgressBarOption::remainder>(option::Remainder{" "}, std::forward<Args>(args)...),
+        details::get<details::ProgressBarOption::max_postfix_text_len>(option::MaxPostfixTextLen{0}, std::forward<Args>(args)...),
+        details::get<details::ProgressBarOption::completed>(option::Completed{false}, std::forward<Args>(args)...),
+        details::get<details::ProgressBarOption::show_percentage>(option::ShowPercentage{false} ,std::forward<Args>(args)...),
+        details::get<details::ProgressBarOption::show_elapsed_time>(option::ShowElapsedTime{false}, std::forward<Args>(args)...),
+        details::get<details::ProgressBarOption::show_remaining_time>(option::ShowRemainingTime{false}, std::forward<Args>(args)...),
+        details::get<details::ProgressBarOption::saved_start_time>(option::SavedStartTime{false}, std::forward<Args>(args)...),
+        details::get<details::ProgressBarOption::foreground_color>(option::ForegroundColor{Color::WHITE}, std::forward<Args>(args)...)
+    )
+  {}
+
+  template <typename T, details::ProgressBarOption id>
+  void set_option(details::Setting<T, id>&& setting){
+    static_assert(!std::is_same<T, typename std::decay<decltype(details::get_value<id>(std::declval<Settings>()))>::type>::value, "Setting has wrong type!");
+    std::lock_guard<std::mutex> lock(_mutex);
+    get_value<id>() = std::move(setting).value;
   }
 
-  void set_bar_width(size_t bar_width) {
-    std::unique_lock<std::mutex> lock{_mutex};
-    _bar_width = bar_width;
+  template <typename T, details::ProgressBarOption id>
+  void set_option(const details::Setting<T, id>& setting){
+    static_assert(!std::is_same<T, typename std::decay<decltype(details::get_value<id>(std::declval<Settings>()))>::type>::value, "Setting has wrong type!");
+    std::lock_guard<std::mutex> lock(_mutex);
+    get_value<id>() = setting.value;
   }
 
-  void start_bar_with(const std::string &start) {
-    std::unique_lock<std::mutex> lock{_mutex};
-    _start = start;
-  }
-
-  void fill_bar_progress_with(const std::string &fill) {
-    std::unique_lock<std::mutex> lock{_mutex};
-    _fill = fill;
-  }
-
-  void lead_bar_progress_with(const std::string &lead) {
-    std::unique_lock<std::mutex> lock{_mutex};
-    _lead = lead;
-  }
-
-  void fill_bar_remainder_with(const std::string &remainder) {
-    std::unique_lock<std::mutex> lock{_mutex};
-    _remainder = remainder;
-  }
-
-  void end_bar_with(const std::string &end) {
-    std::unique_lock<std::mutex> lock{_mutex};
-    _end = end;
-  }
-
-  void set_prefix_text(const std::string &text) {
-    std::unique_lock<std::mutex> lock{_mutex};
-    _prefix_text = text;
-  }
-
-  void set_postfix_text(const std::string &text) {
-    std::unique_lock<std::mutex> lock{_mutex};
-    _postfix_text = text;
-    if (_postfix_text.length() > _max_postfix_text_length)
-      _max_postfix_text_length = _postfix_text.length();
-  }
-
-  void show_percentage() { _show_percentage = true; }
-
-  void hide_percentage() { _show_percentage = false; }
-
-  void set_progress(float value) {
-    {
-      std::unique_lock<std::mutex> lock{_mutex};
-      _progress = value;
+  void set_option(const details::Setting<std::string, details::ProgressBarOption::postfix_text>& setting){
+    std::lock_guard<std::mutex> lock(_mutex);
+    get_value<details::ProgressBarOption::postfix_text>() = setting.value;
+    if(setting.value.length() > get_value<details::ProgressBarOption::max_postfix_text_len>()){
+      get_value<details::ProgressBarOption::max_postfix_text_len>() = setting.value.length();
     }
+  }
+
+  void set_option(details::Setting<std::string, details::ProgressBarOption::postfix_text>&& setting){
+    std::lock_guard<std::mutex> lock(_mutex);
+    get_value<details::ProgressBarOption::postfix_text>() = std::move(setting).value;
+    auto& new_value = get_value<details::ProgressBarOption::postfix_text>();
+    if(new_value.length() > get_value<details::ProgressBarOption::max_postfix_text_len>()){
+      get_value<details::ProgressBarOption::max_postfix_text_len>() = new_value.length();
+    }
+  }
+
+  void set_progress(float newProgress){
+    {
+      std::lock_guard<std::mutex> lck(_mutex);
+      _progress = newProgress;
+    }
+
+    _save_start_time();
     _print_progress();
   }
 
   void tick() {
     {
-      std::unique_lock<std::mutex> lock{_mutex};
+      std::lock_guard<std::mutex> lock{_mutex};
       _progress += 1;
     }
+    _save_start_time();
     _print_progress();
   }
 
   size_t current() {
+    std::lock_guard<std::mutex> lock{_mutex};
     return std::min(static_cast<size_t>(_progress), size_t(100));
   }
 
-  bool is_completed() const { return _completed; }
+  bool is_completed() const { return get_value<details::ProgressBarOption::completed>(); }
 
   void mark_as_completed() {
-    _completed = true;
+    get_value<details::ProgressBarOption::completed>() = true;
     _print_progress();
   }
 
 private:
-  float _progress{0.0};
-  size_t _bar_width{100};
-  std::string _prefix_text{""};
-  std::string _start{"["};
-  std::string _fill{"="};
-  std::string _lead{">"};
-  std::string _remainder{" "};
-  std::string _end{"]"};
-  std::string _postfix_text{""};
-  std::atomic<size_t> _max_postfix_text_length{0};
-  std::atomic<bool> _completed{false};
-  std::atomic<bool> _show_percentage{true};
-  std::mutex _mutex;
-  Color _foreground_color;
 
-  void _print_progress() {
-    std::unique_lock<std::mutex> lock{_mutex};
+  template <details::ProgressBarOption id>
+  auto get_value() -> decltype((details::get_value<id>(std::declval<Settings&>()).value)) {
+    return details::get_value<id>(settings_).value;
+  }
+
+  template <details::ProgressBarOption id>
+  auto get_value() const -> decltype((details::get_value<id>(std::declval<const Settings&>()).value)) {
+    return details::get_value<id>(settings_).value;
+  }
+
+  float _progress{0};
+  Settings settings_;
+  std::chrono::nanoseconds _elapsed;
+  std::chrono::time_point<std::chrono::high_resolution_clock> _start_time_point;
+  std::mutex _mutex;
+
+  template <typename Indicator, size_t count> friend class MultiProgress;
+  std::atomic<bool> _multi_progress_mode{false};
+
+  void _save_start_time() {
+    auto& show_elapsed_time = get_value<details::ProgressBarOption::show_elapsed_time>();
+    auto& saved_start_time = get_value<details::ProgressBarOption::saved_start_time>();
+    auto& show_remaining_time = get_value<details::ProgressBarOption::show_remaining_time>();
+    if ((show_elapsed_time || show_remaining_time) && !saved_start_time) {
+      _start_time_point = std::chrono::high_resolution_clock::now();
+      saved_start_time = true;
+    }
+  }
+
+  void _print_progress(bool from_multi_progress = false) {
+    if (_multi_progress_mode && !from_multi_progress) {
+      if (_progress > 100.0) {
+        get_value<details::ProgressBarOption::completed>() = true;
+      }
+      return;
+    }
+    std::lock_guard<std::mutex> lock{_mutex};
+    auto now = std::chrono::high_resolution_clock::now();
+    if (!get_value<details::ProgressBarOption::completed>())
+      _elapsed = std::chrono::duration_cast<std::chrono::nanoseconds>(now - _start_time_point);
+
     std::cout << termcolor::bold;
-    switch (_foreground_color) {
-    case Color::GREY:
-      std::cout << termcolor::grey;
-      break;
-    case Color::RED:
-      std::cout << termcolor::red;
-      break;
-    case Color::GREEN:
-      std::cout << termcolor::green;
-      break;
-    case Color::YELLOW:
-      std::cout << termcolor::yellow;
-      break;
-    case Color::BLUE:
-      std::cout << termcolor::blue;
-      break;
-    case Color::MAGENTA:
-      std::cout << termcolor::magenta;
-      break;
-    case Color::CYAN:
-      std::cout << termcolor::cyan;
-      break;
-    case Color::WHITE:
-      std::cout << termcolor::white;
-      break;
-    }
-    std::cout << _prefix_text;
-    std::cout << _start;
-    auto pos = static_cast<size_t>(_progress * static_cast<float>(_bar_width) / 100.0);
-    for (size_t i = 0; i < _bar_width; ++i) {
-      if (i < pos)
-        std::cout << _fill;
-      else if (i == pos)
-        std::cout << _lead;
-      else
-        std::cout << _remainder;
-    }
-    std::cout << _end;
-    if (_show_percentage) {
+    details::set_stream_color(std::cout, get_value<details::ProgressBarOption::foreground_color>());
+    std::cout << get_value<details::ProgressBarOption::prefix_text>();
+
+    std::cout << get_value<details::ProgressBarOption::start>();
+
+    details::ProgressScaleWriter writer{std::cout, get_value<details::ProgressBarOption::bar_width>(),
+                                        get_value<details::ProgressBarOption::fill>(),
+                                        get_value<details::ProgressBarOption::lead>(),
+                                        get_value<details::ProgressBarOption::remainder>()};
+    writer.write(_progress);
+
+    std::cout << get_value<details::ProgressBarOption::end>();
+
+    if (get_value<details::ProgressBarOption::show_percentage>()) {
       std::cout << " " << std::min(static_cast<size_t>(_progress), size_t(100)) << "%";
     }
-    if (_max_postfix_text_length == 0)
-      _max_postfix_text_length = 10;
-    std::cout << " " << _postfix_text << std::string(_max_postfix_text_length, ' ') << "\r";
+
+    if (get_value<details::ProgressBarOption::show_elapsed_time>()) {
+      std::cout << " [";
+      details::write_duration(std::cout, _elapsed);
+    }
+
+    if (get_value<details::ProgressBarOption::show_remaining_time>()) {
+      if (get_value<details::ProgressBarOption::show_elapsed_time>())
+        std::cout << "<";
+      else
+        std::cout << " [";
+      auto eta = std::chrono::nanoseconds(
+          _progress > 0 ? static_cast<long long>(_elapsed.count() * 100 / _progress) : 0);
+      auto remaining = eta > _elapsed ? (eta - _elapsed) : (_elapsed - eta);
+      details::write_duration(std::cout, remaining);
+      std::cout << "]";
+    } else {
+      if (get_value<details::ProgressBarOption::show_elapsed_time>())
+        std::cout << "]";
+    }
+
+    if (get_value<details::ProgressBarOption::max_postfix_text_len>() == 0)
+      get_value<details::ProgressBarOption::max_postfix_text_len>() = 10;
+    std::cout << " " << get_value<details::ProgressBarOption::postfix_text>() << std::string(get_value<details::ProgressBarOption::max_postfix_text_len>(), ' ') << "\r";
     std::cout.flush();
     if (_progress > 100.0) {
-      _completed = true;
+      get_value<details::ProgressBarOption::completed>() = true;
     }
-    if (_completed)
+    if (get_value<details::ProgressBarOption::completed>() && !from_multi_progress) // Don't std::endl if calling from MultiProgress
       std::cout << termcolor::reset << std::endl;
   }
 };

include/indicators/progress_spinner.hpp

@@ -25,133 +25,187 @@ OUT OF OR IN CONNECTION WITH THE SOFTWARE  OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
 */
 #pragma once
+
+#include <indicators/details/stream_helper.hpp>
+
+#define NOMINMAX
 #include <algorithm>
 #include <atomic>
+#include <chrono>
+#include <cmath>
 #include <indicators/color.hpp>
+#include <indicators/setting.hpp>
+#include <iomanip>
 #include <iostream>
 #include <mutex>
 #include <string>
+#include <tuple>
 #include <thread>
 #include <vector>
 
 namespace indicators {
 
 class ProgressSpinner {
+  using Settings = std::tuple<
+      option::ForegroundColor,
+      option::PrefixText,
+      option::PostfixText,
+      option::ShowPercentage,
+      option::ShowElapsedTime,
+      option::ShowRemainingTime,
+      option::ShowSpinner,
+      option::SavedStartTime,
+      option::Completed,
+      option::MaxPostfixTextLen,
+      option::SpinnerStates
+      >;
 public:
-  void set_foreground_color(Color color) {
-    std::unique_lock<std::mutex> lock{_mutex};
-    _foreground_color = color;
+  template <typename... Args, typename std::enable_if<details::are_settings_from_tuple<Settings, typename std::decay<Args>::type...>::value, void*>::type = nullptr>
+  explicit ProgressSpinner(Args&&... args) : settings_(
+      details::get<details::ProgressBarOption::foreground_color>(option::ForegroundColor{Color::WHITE}, std::forward<Args>(args)...),
+      details::get<details::ProgressBarOption::prefix_text>(option::PrefixText{}, std::forward<Args>(args)...),
+      details::get<details::ProgressBarOption::postfix_text>(option::PostfixText{}, std::forward<Args>(args)...),
+      details::get<details::ProgressBarOption::show_percentage>(option::ShowPercentage{true}, std::forward<Args>(args)...),
+      details::get<details::ProgressBarOption::show_elapsed_time>(option::ShowElapsedTime{false}, std::forward<Args>(args)...),
+      details::get<details::ProgressBarOption::show_remaining_time>(option::ShowRemainingTime{false}, std::forward<Args>(args)...),
+      details::get<details::ProgressBarOption::spinner_show>(option::ShowSpinner{true}, std::forward<Args>(args)...),
+      details::get<details::ProgressBarOption::saved_start_time>(option::SavedStartTime{false}, std::forward<Args>(args)...),
+      details::get<details::ProgressBarOption::completed>(option::Completed{false}, std::forward<Args>(args)...),
+      details::get<details::ProgressBarOption::max_postfix_text_len>(option::MaxPostfixTextLen{0}, std::forward<Args>(args)...),
+      details::get<details::ProgressBarOption::spinner_states>(option::SpinnerStates{std::vector<std::string>{"⠋", "⠙", "⠹", "⠸", "⠼", "⠴", "⠦", "⠧", "⠇", "⠏"}}, std::forward<Args>(args)...)
+      ){}
+
+  template <typename T, details::ProgressBarOption id>
+  void set_option(details::Setting<T, id>&& setting){
+    static_assert(!std::is_same<T, typename std::decay<decltype(details::get_value<id>(std::declval<Settings>()))>::type>::value, "Setting has wrong type!");
+    std::lock_guard<std::mutex> lock(_mutex);
+    get_value<id>() = std::move(setting).value;
   }
 
-  void set_prefix_text(const std::string &text) {
-    std::unique_lock<std::mutex> lock{_mutex};
-    _prefix_text = text;
+  template <typename T, details::ProgressBarOption id>
+  void set_option(const details::Setting<T, id>& setting){
+    static_assert(!std::is_same<T, typename std::decay<decltype(details::get_value<id>(std::declval<Settings>()))>::type>::value, "Setting has wrong type!");
+    std::lock_guard<std::mutex> lock(_mutex);
+    get_value<id>() = setting.value;
   }
 
-  void set_postfix_text(const std::string &text) {
-    std::unique_lock<std::mutex> lock{_mutex};
-    _postfix_text = text;
-    if (_postfix_text.length() > _max_postfix_text_length)
-      _max_postfix_text_length = _postfix_text.length();
+  void set_option(const details::Setting<std::string, details::ProgressBarOption::postfix_text>& setting){
+    std::lock_guard<std::mutex> lock(_mutex);
+    get_value<details::ProgressBarOption::postfix_text>() = setting.value;
+    if(setting.value.length() > get_value<details::ProgressBarOption::max_postfix_text_len>()){
+      get_value<details::ProgressBarOption::max_postfix_text_len>() = setting.value.length();
+    }
   }
 
-  void show_percentage() { _show_percentage = true; }
-
-  void hide_percentage() { _show_percentage = false; }
-
-  void show_spinner() { _show_spinner = true; }
-
-  void hide_spinner() { _show_spinner = false; }
+  void set_option(details::Setting<std::string, details::ProgressBarOption::postfix_text>&& setting){
+    std::lock_guard<std::mutex> lock(_mutex);
+    get_value<details::ProgressBarOption::postfix_text>() = std::move(setting).value;
+    auto& new_value = get_value<details::ProgressBarOption::postfix_text>();
+    if(new_value.length() > get_value<details::ProgressBarOption::max_postfix_text_len>()){
+      get_value<details::ProgressBarOption::max_postfix_text_len>() = new_value.length();
+    }
+  }
 
   void set_progress(float value) {
     {
-      std::unique_lock<std::mutex> lock{_mutex};
+      std::lock_guard<std::mutex> lock{_mutex};
       _progress = value;
     }
+    _save_start_time();
     _print_progress();
   }
 
   void tick() {
     {
-      std::unique_lock<std::mutex> lock{_mutex};
+      std::lock_guard<std::mutex> lock{_mutex};
       _progress += 1;
     }
+    _save_start_time();
     _print_progress();
   }
 
   size_t current() {
+    std::lock_guard<std::mutex> lock{_mutex};
     return std::min(static_cast<size_t>(_progress), size_t(100));
   }
 
-  bool is_completed() const { return _completed; }
+  bool is_completed() const { return get_value<details::ProgressBarOption::completed>(); }
 
   void mark_as_completed() {
-    _completed = true;
+    get_value<details::ProgressBarOption::completed>() = true;
     _print_progress();
   }
 
-  void set_spinner_states(const std::vector<std::string> &states) {
-    std::unique_lock<std::mutex> lock{_mutex};
-    _states = states;
+private:
+  Settings settings_;
+  float _progress{0.0};
+  size_t _index{0};
+  std::chrono::time_point<std::chrono::high_resolution_clock> _start_time_point;
+  std::mutex _mutex;
+
+  template <details::ProgressBarOption id>
+  auto get_value() -> decltype((details::get_value<id>(std::declval<Settings&>()).value)) {
+    return details::get_value<id>(settings_).value;
   }
 
-private:
-  float _progress{0.0};
-  std::string _prefix_text{""};
-  size_t _index{0};
-  std::vector<std::string> _states{"⠋", "⠙", "⠹", "⠸", "⠼", "⠴", "⠦", "⠧", "⠇", "⠏"};
-  std::string _postfix_text{""};
-  std::atomic<size_t> _max_postfix_text_length{0};
-  std::atomic<bool> _completed{false};
-  std::atomic<bool> _show_percentage{true};
-  std::atomic<bool> _show_spinner{true};
-  std::mutex _mutex;
-  Color _foreground_color;
+  template <details::ProgressBarOption id>
+  auto get_value() const -> decltype((details::get_value<id>(std::declval<const Settings&>()).value)) {
+    return details::get_value<id>(settings_).value;
+  }
+
+  void _save_start_time() {
+    auto& show_elapsed_time = get_value<details::ProgressBarOption::show_elapsed_time>();
+    auto& show_remaining_time = get_value<details::ProgressBarOption::show_remaining_time>();
+    auto& saved_start_time = get_value<details::ProgressBarOption::saved_start_time>();
+    if ((show_elapsed_time || show_remaining_time) && !saved_start_time) {
+      _start_time_point = std::chrono::high_resolution_clock::now();
+      saved_start_time = true;
+    }
+  }
 
   void _print_progress() {
-    std::unique_lock<std::mutex> lock{_mutex};
+    std::lock_guard<std::mutex> lock{_mutex};
+    auto now = std::chrono::high_resolution_clock::now();
+    auto elapsed = std::chrono::duration_cast<std::chrono::nanoseconds>(now - _start_time_point);
+
     std::cout << termcolor::bold;
-    switch (_foreground_color) {
-    case Color::GREY:
-      std::cout << termcolor::grey;
-      break;
-    case Color::RED:
-      std::cout << termcolor::red;
-      break;
-    case Color::GREEN:
-      std::cout << termcolor::green;
-      break;
-    case Color::YELLOW:
-      std::cout << termcolor::yellow;
-      break;
-    case Color::BLUE:
-      std::cout << termcolor::blue;
-      break;
-    case Color::MAGENTA:
-      std::cout << termcolor::magenta;
-      break;
-    case Color::CYAN:
-      std::cout << termcolor::cyan;
-      break;
-    case Color::WHITE:
-      std::cout << termcolor::white;
-      break;
-    }
-    std::cout << _prefix_text;
-    if (_show_spinner)
-      std::cout << _states[_index % _states.size()];
-    if (_show_percentage) {
+    details::set_stream_color(std::cout, get_value<details::ProgressBarOption::foreground_color>());
+    std::cout << get_value<details::ProgressBarOption::prefix_text>();
+    if (get_value<details::ProgressBarOption::spinner_show>())
+      std::cout << get_value<details::ProgressBarOption::spinner_states>()[_index % get_value<details::ProgressBarOption::spinner_states>().size()];
+    if (get_value<details::ProgressBarOption::show_percentage>()) {
       std::cout << " " << std::min(static_cast<size_t>(_progress), size_t(100)) << "%";
     }
-    if (_max_postfix_text_length == 0)
-      _max_postfix_text_length = 10;
-    std::cout << " " << _postfix_text << std::string(_max_postfix_text_length, ' ') << "\r";
+
+    if (get_value<details::ProgressBarOption::show_elapsed_time>()) {
+      std::cout << " [";
+      details::write_duration(std::cout, elapsed);
+    }
+
+    if (get_value<details::ProgressBarOption::show_remaining_time>()) {
+      if (get_value<details::ProgressBarOption::show_elapsed_time>())
+        std::cout << "<";
+      else
+        std::cout << " [";
+      auto eta = std::chrono::nanoseconds(
+          _progress > 0 ? static_cast<long long>(elapsed.count() * 100 / _progress) : 0);
+      auto remaining = eta > elapsed ? (eta - elapsed) : (elapsed - eta);
+      details::write_duration(std::cout, remaining);
+      std::cout << "]";
+    } else {
+      if (get_value<details::ProgressBarOption::show_elapsed_time>())
+        std::cout << "]";
+    }
+
+    if (get_value<details::ProgressBarOption::max_postfix_text_len>() == 0)
+      get_value<details::ProgressBarOption::max_postfix_text_len>() = 10;
+    std::cout << " " << get_value<details::ProgressBarOption::postfix_text>() << std::string(get_value<details::ProgressBarOption::max_postfix_text_len>(), ' ') << "\r";
     std::cout.flush();
     _index += 1;
     if (_progress > 100.0) {
-      _completed = true;
+      get_value<details::ProgressBarOption::completed>() = true;
     }
-    if (_completed)
+    if (get_value<details::ProgressBarOption::completed>())
       std::cout << termcolor::reset << std::endl;
   }
 };

include/indicators/setting.hpp

@@ -0,0 +1,222 @@
+/*
+Activity Indicators for Modern C++
+https://github.com/p-ranav/indicators
+
+Licensed under the MIT License <http://opensource.org/licenses/MIT>.
+SPDX-License-Identifier: MIT
+Copyright (c) 2019 Dawid Pilarski <dawid.pilarski@panicsoftware.com>.
+
+Permission is hereby  granted, free of charge, to any  person obtaining a copy
+of this software and associated  documentation files (the "Software"), to deal
+in the Software  without restriction, including without  limitation the rights
+to  use, copy,  modify, merge,  publish, distribute,  sublicense, and/or  sell
+copies  of  the Software,  and  to  permit persons  to  whom  the Software  is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE  IS PROVIDED "AS  IS", WITHOUT WARRANTY  OF ANY KIND,  EXPRESS OR
+IMPLIED,  INCLUDING BUT  NOT  LIMITED TO  THE  WARRANTIES OF  MERCHANTABILITY,
+FITNESS FOR  A PARTICULAR PURPOSE AND  NONINFRINGEMENT. IN NO EVENT  SHALL THE
+AUTHORS  OR COPYRIGHT  HOLDERS  BE  LIABLE FOR  ANY  CLAIM,  DAMAGES OR  OTHER
+LIABILITY, WHETHER IN AN ACTION OF  CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE  OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+*/
+#pragma once
+
+#include <cstddef>
+#include <indicators/color.hpp>
+#include <string>
+#include <type_traits>
+#include <utility>
+
+
+namespace indicators{
+
+namespace details{
+
+template <bool condition>
+struct if_else;
+
+template<>
+struct if_else<true>{
+  using type = std::true_type;
+};
+
+template<>
+struct if_else<false>{
+  using type = std::false_type ;
+};
+
+template <bool condition, typename True, typename False>
+struct if_else_type;
+
+template <typename True, typename False>
+struct if_else_type<true, True, False>{
+  using type = True;
+};
+
+template <typename True, typename False>
+struct if_else_type<false, True, False>{
+  using type = False;
+};
+
+template <typename... Ops>
+struct conjuction;
+
+template <>
+struct conjuction<> : std::true_type {};
+
+template <typename Op, typename... TailOps>
+struct conjuction<Op, TailOps...> : if_else_type<!Op::value, std::false_type, conjuction<TailOps...>>::type {};
+
+template <typename... Ops>
+struct disjunction;
+
+template <>
+struct disjunction<> : std::false_type {};
+
+template <typename Op, typename... TailOps>
+struct disjunction<Op, TailOps...> : if_else_type<Op::value, std::true_type, disjunction<TailOps...>>::type {};
+
+enum class ProgressBarOption{
+  bar_width=0,
+  prefix_text,
+  postfix_text,
+  start,
+  end,
+  fill,
+  lead,
+  remainder,
+  max_postfix_text_len,
+  completed,
+  show_percentage,
+  show_elapsed_time,
+  show_remaining_time,
+  saved_start_time,
+  foreground_color,
+  spinner_show,
+  spinner_states
+};
+
+template <typename T, ProgressBarOption Id>
+struct Setting{
+  template <typename... Args, typename = typename std::enable_if<std::is_constructible<T, Args...>::value>::type>
+  explicit Setting(Args&&... args) : value(std::forward<Args>(args)...){}
+  Setting(const Setting&) = default;
+  Setting(Setting&&) = default;
+
+  static constexpr auto id = Id;
+  using type = T;
+
+  T value{};
+};
+
+template <typename T>
+struct is_setting : std::false_type{};
+
+template <ProgressBarOption Id, typename T>
+struct is_setting<Setting<T, Id>> : std::true_type{};
+
+template <typename... Args>
+struct are_settings : if_else<conjuction<is_setting<Args>...>::value>::type {};
+
+template <>
+struct are_settings<> : std::true_type{};
+
+template<typename Setting, typename Tuple>
+struct is_setting_from_tuple;
+
+template<typename Setting>
+struct is_setting_from_tuple<Setting, std::tuple<>> : std::true_type {};
+
+template <typename Setting, typename... TupleTypes>
+struct is_setting_from_tuple<Setting, std::tuple<TupleTypes...>> :
+    if_else<disjunction<std::is_same<Setting, TupleTypes>...>::value>::type {};
+
+template <typename Tuple, typename... Settings>
+struct are_settings_from_tuple : if_else<conjuction<is_setting_from_tuple<Settings, Tuple>...>::value>::type {};
+
+
+template <ProgressBarOption Id>
+struct always_true{
+  static constexpr auto value = true;
+};
+
+template<ProgressBarOption Id, typename Default>
+Default&& get_impl(Default&& def){
+  return std::forward<Default>(def);
+}
+
+template <ProgressBarOption Id, typename Default, typename T, typename... Args>
+auto get_impl(Default&& def, T&& first, Args&&... tail) -> typename std::enable_if<
+                                                (std::decay<T>::type::id == Id),
+                                                decltype(std::forward<T>(first))>
+                                                ::type{
+    return std::forward<T>(first);
+}
+
+template <ProgressBarOption Id, typename Default, typename T, typename... Args>
+auto get_impl(Default&& def, T&& first, Args&&... tail) -> typename std::enable_if<
+    (std::decay<T>::type::id != Id),
+    decltype(get_impl<Id>(std::forward<Default>(def), std::forward<Args>(tail)...))>::type{
+  return get_impl<Id>(std::forward<Default>(def), std::forward<Args>(tail)...);
+}
+
+template <ProgressBarOption Id, typename Default,  typename... Args, typename = typename std::enable_if<are_settings<Args...>::value, void>::type>
+auto get(Default&& def, Args&&... args) -> decltype(details::get_impl<Id>(std::forward<Default>(def), std::forward<Args>(args)...)){
+  return details::get_impl<Id>(std::forward<Default>(def), std::forward<Args>(args)...);
+}
+
+template <ProgressBarOption Id>
+using StringSetting = Setting<std::string, Id>;
+
+template <ProgressBarOption Id>
+using IntegerSetting = Setting<std::size_t, Id>;
+
+template <ProgressBarOption Id>
+using BooleanSetting = Setting<bool, Id>;
+
+template <ProgressBarOption Id, typename Tuple, std::size_t counter =0>
+struct option_idx;
+
+template <ProgressBarOption Id, typename T, typename... Settings, std::size_t counter>
+struct option_idx<Id, std::tuple<T, Settings...>, counter> : if_else_type<(Id == T::id),
+    std::integral_constant<std::size_t, counter>,
+    option_idx<Id, std::tuple<Settings...>, counter+1>>::type{};
+
+template <ProgressBarOption Id, std::size_t counter>
+struct option_idx<Id, std::tuple<>, counter>{
+  static_assert(always_true<(ProgressBarOption)Id>::value, "No such option was found");
+};
+
+template <ProgressBarOption Id, typename Settings>
+auto get_value(Settings&& settings) -> decltype((std::get<option_idx<Id, typename std::decay<Settings>::type>::value>(std::declval<Settings&&>()))){
+  return std::get<option_idx<Id, typename std::decay<Settings>::type>::value>(std::forward<Settings>(settings));
+}
+
+}
+
+
+namespace option{
+  using BarWidth = details::IntegerSetting<details::ProgressBarOption::bar_width>;
+  using PrefixText = details::StringSetting<details::ProgressBarOption::prefix_text>;
+  using PostfixText = details::StringSetting<details::ProgressBarOption::postfix_text>;
+  using Start = details::StringSetting<details::ProgressBarOption::start>;
+  using End = details::StringSetting<details::ProgressBarOption::end>;
+  using Fill = details::StringSetting<details::ProgressBarOption::fill>;
+  using Lead = details::StringSetting<details::ProgressBarOption::lead>;
+  using Remainder = details::StringSetting<details::ProgressBarOption::remainder>;
+  using MaxPostfixTextLen = details::IntegerSetting<details::ProgressBarOption::max_postfix_text_len>;
+  using Completed = details::BooleanSetting<details::ProgressBarOption::completed>;
+  using ShowPercentage = details::BooleanSetting<details::ProgressBarOption::show_percentage>;
+  using ShowElapsedTime = details::BooleanSetting<details::ProgressBarOption::show_elapsed_time>;
+  using ShowRemainingTime = details::BooleanSetting<details::ProgressBarOption::show_remaining_time>;
+  using SavedStartTime = details::BooleanSetting<details::ProgressBarOption::saved_start_time>;
+  using ForegroundColor = details::Setting<Color, details::ProgressBarOption::foreground_color>;
+  using ShowSpinner = details::BooleanSetting<details::ProgressBarOption::spinner_show>;
+  using SpinnerStates = details::Setting<std::vector<std::string>, details::ProgressBarOption::spinner_states>;
+}
+}

indicaConfig.cmake.in

@@ -1,9 +0,0 @@
-@PACKAGE_INIT@
-
-include(CMakeFindDependencyMacro)
-
-find_dependency(Threads)
-
-if (NOT TARGET indica::indica)
-  include(${CMAKE_CURRENT_LIST_DIR}/indicaTargets.cmake)
-endif ()

indicators.pc.in

@@ -0,0 +1,7 @@
+prefix=@CMAKE_INSTALL_PREFIX@
+includedir=${prefix}/@CMAKE_INSTALL_INCLUDEDIR@
+
+Name: indicators
+Description: Activity Indicators for Modern C++
+Version: @PROJECT_VERSION@
+Cflags: -I${includedir}

indicatorsConfig.cmake.in

@@ -0,0 +1,9 @@
+@PACKAGE_INIT@
+
+include(CMakeFindDependencyMacro)
+
+find_dependency(Threads)
+
+if (NOT TARGET indicators::indicators)
+  include(${CMAKE_CURRENT_LIST_DIR}/indicatorsTargets.cmake)
+endif ()

samples/CMakeLists.txt

@@ -0,0 +1,24 @@
+
+add_executable(block_progress_bar block_progress_bar.cpp)
+target_link_libraries(block_progress_bar PRIVATE indicators::indicators)
+
+add_executable(multi_threaded_bar multi_threaded_bar.cpp)
+target_link_libraries(multi_threaded_bar PRIVATE indicators::indicators)
+
+add_executable(progress_bar_set_progress progress_bar_set_progress.cpp)
+target_link_libraries(progress_bar_set_progress PRIVATE indicators::indicators)
+
+add_executable(progress_bar_tick progress_bar_tick.cpp)
+target_link_libraries(progress_bar_tick PRIVATE indicators::indicators)
+
+add_executable(progress_spinner progress_spinner.cpp)
+target_link_libraries(progress_spinner PRIVATE indicators::indicators)
+
+add_executable(time_meter time_meter.cpp)
+target_link_libraries(time_meter PRIVATE indicators::indicators)
+
+add_executable(multi_progress_bar multi_progress_bar.cpp)
+target_link_libraries(multi_progress_bar PRIVATE indicators::indicators)
+
+add_executable(multi_block_progress_bar multi_block_progress_bar.cpp)
+target_link_libraries(multi_block_progress_bar PRIVATE indicators::indicators)

samples/block_progress_bar.cpp

@@ -1,20 +1,16 @@
+#include <chrono>
 #include <indicators/block_progress_bar.hpp>
 #include <thread>
-#include <chrono>
 
 int main() {
 
   // Hide cursor
   std::cout << "\e[?25l";
-  
-  indicators::BlockProgressBar bar;
-  
-  // Configure the bar
-  bar.set_bar_width(80);
-  bar.start_bar_with("[");
-  bar.end_bar_with("]");
-  bar.set_foreground_color(indicators::Color::WHITE); 
-  
+
+  indicators::BlockProgressBar bar{
+    indicators::option::BarWidth {80}
+  };
+
   // Update bar state
   auto progress = 0.0f;
   while (true) {
@@ -26,7 +22,7 @@ int main() {
   }
 
   // Show cursor
-  std::cout << "\e[?25h";  
+  std::cout << "\e[?25h";
 
   return 0;
 }

samples/multi_block_progress_bar.cpp

@@ -0,0 +1,70 @@
+#include <indicators/block_progress_bar.hpp>
+#include <indicators/multi_progress.hpp>
+
+int main() {
+  using namespace indicators;
+  BlockProgressBar bar1{
+    option::BarWidth{50},
+    option::ForegroundColor{Color::YELLOW},
+    option::ShowElapsedTime{true},
+    option::ShowRemainingTime{true},
+    option::PrefixText{"Progress Bar #1 "}
+  };
+
+  BlockProgressBar bar2{
+    option::BarWidth{50},
+    option::ForegroundColor{Color::CYAN},
+    option::ShowElapsedTime{true},
+    option::ShowRemainingTime{true},
+    option::PrefixText{"Progress Bar #2 "}
+  };
+
+  BlockProgressBar bar3{
+    option::BarWidth{50},
+    option::ForegroundColor{Color::RED},
+    option::ShowElapsedTime{true},
+    option::ShowRemainingTime{true},
+    option::PrefixText{"Progress Bar #3 "}
+  };
+
+  indicators::MultiProgress<indicators::BlockProgressBar, 3> bars(bar1, bar2, bar3);
+
+  std::cout << "Multiple Progress Bars:\n";
+
+  auto job1 = [&bars]() {
+    while (true) {
+      bars.tick<0>();
+      if (bars.is_completed<0>())
+        break;
+      std::this_thread::sleep_for(std::chrono::milliseconds(100));
+    }
+  };
+
+  auto job2 = [&bars]() {
+    while (true) {
+      bars.tick<1>();
+      if (bars.is_completed<1>())
+        break;
+      std::this_thread::sleep_for(std::chrono::milliseconds(200));
+    }
+  };
+
+  auto job3 = [&bars]() {
+    while (true) {
+      bars.tick<2>();
+      if (bars.is_completed<2>())
+        break;
+      std::this_thread::sleep_for(std::chrono::milliseconds(60));
+    }
+  };
+
+  std::thread first_job(job1);
+  std::thread second_job(job2);
+  std::thread third_job(job3);
+
+  first_job.join();
+  second_job.join();
+  third_job.join();
+
+  return 0;
+}

samples/multi_progress_bar.cpp

@@ -0,0 +1,85 @@
+#include <indicators/multi_progress.hpp>
+#include <indicators/progress_bar.hpp>
+
+int main() {
+
+  indicators::ProgressBar bar1{
+    indicators::option::BarWidth{50},
+    indicators::option::Start{"["},
+    indicators::option::Fill{"■"},
+    indicators::option::Lead{"■"},
+    indicators::option::Remainder{" "},
+    indicators::option::End{" ]"},
+    indicators::option::ForegroundColor{indicators::Color::YELLOW},
+    indicators::option::ShowElapsedTime{true},
+    indicators::option::ShowRemainingTime{true},
+    indicators::option::PrefixText{"Progress Bar #1 "}
+  };
+
+  indicators::ProgressBar bar2{
+    indicators::option::BarWidth{50},
+    indicators::option::Start{"["},
+    indicators::option::Fill{"="},
+    indicators::option::Lead{">"},
+    indicators::option::Remainder{" "},
+    indicators::option::End{" ]"},
+    indicators::option::ForegroundColor{indicators::Color::CYAN},
+    indicators::option::ShowElapsedTime{true},
+    indicators::option::ShowRemainingTime{true},
+    indicators::option::PrefixText{"Progress Bar #2 "}
+  };
+
+  indicators::ProgressBar bar3{
+    indicators::option::BarWidth{50},
+    indicators::option::Start{"["},
+    indicators::option::Fill{"#"},
+    indicators::option::Lead{"#"},
+    indicators::option::Remainder{" "},
+    indicators::option::End{" ]"},
+    indicators::option::ForegroundColor{indicators::Color::CYAN},
+    indicators::option::ShowElapsedTime{true},
+    indicators::option::ShowRemainingTime{true},
+    indicators::option::PrefixText{"Progress Bar #3 "}
+  };
+
+  indicators::MultiProgress<indicators::ProgressBar, 3> bars(bar1, bar2, bar3);
+
+  std::cout << "Multiple Progress Bars:\n";
+
+  auto job1 = [&bars]() {
+    while (true) {
+      bars.tick<0>();
+      if (bars.is_completed<0>())
+        break;
+      std::this_thread::sleep_for(std::chrono::milliseconds(100));
+    }
+  };
+
+  auto job2 = [&bars]() {
+    while (true) {
+      bars.tick<1>();
+      if (bars.is_completed<1>())
+        break;
+      std::this_thread::sleep_for(std::chrono::milliseconds(200));
+    }
+  };
+
+  auto job3 = [&bars]() {
+    while (true) {
+      bars.tick<2>();
+      if (bars.is_completed<2>())
+        break;
+      std::this_thread::sleep_for(std::chrono::milliseconds(60));
+    }
+  };
+
+  std::thread first_job(job1);
+  std::thread second_job(job2);
+  std::thread third_job(job3);
+
+  first_job.join();
+  second_job.join();
+  third_job.join();
+
+  return 0;
+}

samples/multi_threaded_bar.cpp

@@ -0,0 +1,61 @@
+#include <indicators/progress_bar.hpp>
+#include <vector>
+
+int main() {
+
+  indicators::ProgressBar bar{
+    indicators::option::BarWidth{50},
+    indicators::option::Start{"["},
+    indicators::option::Fill{"■"},
+    indicators::option::Lead{"■"},
+    indicators::option::Remainder{"-"},
+    indicators::option::End{" ]"},
+    indicators::option::ForegroundColor{indicators::Color::YELLOW},
+  };
+
+  // As configured, the bar will look like this:
+  //
+  // [■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■-------------] 70%
+  //
+  //
+
+  std::atomic<size_t> index{0};
+  std::vector<std::string> status_text = {"Rocket.exe is not responding",
+                                          "Finding a replacement engineer",
+                                          "Buying more snacks",
+                                          "Assimilating the modding community",
+                                          "Crossing fingers",
+                                          "Porting KSP to a Nokia 3310"};
+
+  // Let's say you want to append some status text to the right of the progress bar
+  // You can use bar.set_postfix_text(...) to append text to the right
+  //
+  // [■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■-------------] 70% Finding a replacement engineer
+  //                                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+  //
+  //
+
+  auto job = [&bar, &index, &status_text]() {
+    while (true) {
+      if (bar.is_completed()) {
+        break;
+      }
+      bar.set_option(indicators::option::PostfixText{status_text[index % status_text.size()]});
+      bar.tick();
+      index += 1;
+      std::this_thread::sleep_for(std::chrono::milliseconds(200));
+    }
+  };
+
+  std::thread first_job(job);
+  std::thread second_job(job);
+  std::thread third_job(job);
+  std::thread last_job(job);
+
+  first_job.join();
+  second_job.join();
+  third_job.join();
+  last_job.join();
+
+  return 0;
+}

samples/progress_bar_set_progress.cpp

@@ -0,0 +1,51 @@
+#include <chrono>
+#include <indicators/progress_bar.hpp>
+#include <thread>
+
+int main() {
+
+  // Hide cursor
+  std::cout << "\e[?25l";
+
+  indicators::ProgressBar bar{
+    indicators::option::BarWidth{50},
+    indicators::option::Start{"["},
+    indicators::option::Fill{"■"},
+    indicators::option::Lead{"■"},
+    indicators::option::Remainder{"-"},
+    indicators::option::End{" ]"},
+    indicators::option::PostfixText{"Loading dependency 1/4"},
+    indicators::option::ForegroundColor{indicators::Color::CYAN},
+  };
+
+  // Update bar state
+  bar.set_progress(10); // 10% done
+
+  // do some work
+  std::this_thread::sleep_for(std::chrono::milliseconds(800));
+
+  bar.set_option(indicators::option::PostfixText{"Loading dependency 2/4"});
+
+  bar.set_progress(30); // 30% done
+
+  // do some more work
+  std::this_thread::sleep_for(std::chrono::milliseconds(700));
+
+  bar.set_option(indicators::option::PostfixText{"Loading dependency 3/4"});
+
+  bar.set_progress(65); // 65% done
+
+  // do final bit of work
+  std::this_thread::sleep_for(std::chrono::milliseconds(900));
+
+  bar.set_option(indicators::option::PostfixText{"Loaded dependencies!"});
+
+  bar.set_progress(100); // all done
+
+  bar.mark_as_completed();
+
+  // Show cursor
+  std::cout << "\e[?25h";
+
+  return 0;
+}

samples/progress_bar_tick.cpp

@@ -0,0 +1,26 @@
+#include <chrono>
+#include <indicators/progress_bar.hpp>
+#include <thread>
+
+int main() {
+  indicators::ProgressBar bar{
+    indicators::option::BarWidth{50},
+    indicators::option::Start{"["},
+    indicators::option::Fill{"="},
+    indicators::option::Lead{">"},
+    indicators::option::Remainder{" "},
+    indicators::option::End{" ]"},
+    indicators::option::PostfixText{"Getting started"},
+    indicators::option::ForegroundColor{indicators::Color::GREEN},
+  };
+
+  // Update bar state
+  while (true) {
+    bar.tick();
+    if (bar.is_completed())
+      break;
+    std::this_thread::sleep_for(std::chrono::milliseconds(100));
+  }
+
+  return 0;
+}

samples/progress_spinner.cpp

@@ -0,0 +1,37 @@
+#include <indicators/progress_spinner.hpp>
+
+int main() {
+
+  // Hide cursor
+  std::cout << "\e[?25l";
+
+  indicators::ProgressSpinner spinner{
+    indicators::option::PostfixText{"Checking credentials"},
+    indicators::option::ForegroundColor{indicators::Color::YELLOW},
+    indicators::option::SpinnerStates{std::vector<std::string>{"⠈", "⠐", "⠠", "⢀", "⡀", "⠄", "⠂", "⠁"}},
+  };
+
+  // Update spinner state
+  auto job = [&spinner]() {
+    while (true) {
+      if (spinner.is_completed()) {
+        spinner.set_option(indicators::option::ForegroundColor{indicators::Color::GREEN});
+        spinner.set_option(indicators::option::PrefixText{"✔"});
+        spinner.set_option(indicators::option::ShowSpinner{false});
+        spinner.set_option(indicators::option::ShowPercentage{false});
+        spinner.set_option(indicators::option::PostfixText{"Authenticated!"});
+        spinner.mark_as_completed();
+        break;
+      } else
+        spinner.tick();
+      std::this_thread::sleep_for(std::chrono::milliseconds(40));
+    }
+  };
+  std::thread thread(job);
+  thread.join();
+
+  // Show cursor
+  std::cout << "\e[?25h";
+
+  return 0;
+}

samples/time_meter.cpp

@@ -0,0 +1,31 @@
+#include <chrono>
+#include <indicators/progress_bar.hpp>
+#include <thread>
+
+int main() {
+  indicators::ProgressBar bar{
+    indicators::option::BarWidth{50},
+    indicators::option::Start{" ["},
+    indicators::option::Fill{"█"},
+    indicators::option::Lead{"█"},
+    indicators::option::Remainder{"-"},
+    indicators::option::End{"]"},
+    indicators::option::PostfixText{"Training Gaze Network "},
+    indicators::option::ForegroundColor{indicators::Color::YELLOW},
+    indicators::option::ShowElapsedTime{true},
+    indicators::option::ShowRemainingTime{true},
+  };
+
+  // Update bar state
+  while (true) {
+    bar.tick();
+    if (bar.is_completed())
+      break;
+    std::this_thread::sleep_for(std::chrono::milliseconds(1000));
+  }
+
+  // Show cursor
+  std::cout << "\e[?25h";
+
+  return 0;
+}