Update README.md

Feature/multi progress

.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

@@ -1,6 +1,8 @@
 cmake_minimum_required(VERSION 3.8)
 project(indica VERSION 1.0.0 LANGUAGES CXX)
 option(INDICA_BUILD_TESTS OFF)
+option(SAMPLES "Build Samples" OFF)
+option(DEMO "Build Demo" OFF)
 
 include(CMakePackageConfigHelpers)
 include(GNUInstallDirs)
@@ -16,6 +18,15 @@ target_include_directories(indica INTERFACE
   $<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}/include>)
 target_link_libraries(indica INTERFACE Threads::Threads)
 
+
+if( DEMO )
+    add_subdirectory(demo)
+endif()
+
+if( SAMPLES )
+    add_subdirectory(samples)
+endif()
+
 configure_package_config_file(indicaConfig.cmake.in
   ${CMAKE_CURRENT_BINARY_DIR}/indicaConfig.cmake
   INSTALL_DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/indica)

README.md

@@ -3,10 +3,13 @@
 </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://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-1.4-blue.svg?cacheSeconds=2592000" alt="version"/>
 </p>
 
 <p align="center">
@@ -15,56 +18,30 @@
 
 # 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:
 
@@ -72,6 +49,10 @@ 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>
@@ -87,7 +68,7 @@ int main() {
   bar.lead_bar_progress_with(">");
   bar.fill_bar_remainder_with(" ");
   bar.end_bar_with("]");
-  bar.set_postfix_text("Getting started");
+  bar.set_postfix_text("Extracting Archive");
   bar.set_foreground_color(indicators::Color::GREEN); 
   
   // Update bar state
@@ -108,121 +89,117 @@ 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() {
+
+  // Hide cursor
+  std::cout << "\e[?25l";
+
   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); 
-  
+  bar.fill_bar_progress_with("■");
+  bar.lead_bar_progress_with("■");  
+  bar.fill_bar_remainder_with("-");
+  bar.end_bar_with(" ]");
+  bar.set_postfix_text("Loading dependency 1/4");  
+  bar.set_foreground_color(indicators::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_postfix_text("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_postfix_text("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_postfix_text("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;
+
+  // Configure the bar
   bar.set_bar_width(50);
-  bar.start_bar_with("[");
-  bar.fill_bar_progress_with("■");
-  bar.lead_bar_progress_with("■");
+  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_prefix_text("Training Gaze Network 👀");
   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
-  //                                                        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-  //
-  //  
+  // Show time elapsed and remaining
+  bar.show_elapsed_time();
+  bar.show_remaining_time();
 
-  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));
-    }
-  };
+  // Update bar state
+  while (true) {
+    bar.tick();
+    if (bar.is_completed())
+      break;
+    std::this_thread::sleep_for(std::chrono::milliseconds(1000));
+  }
 
-  std::thread first_job(job);
-  std::thread second_job(job);
-  std::thread third_job(job);
-  std::thread last_job(job);
+  // 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
@@ -260,47 +237,124 @@ int main() {
 }
 ```
 
+# MultiProgress
+
+`indicators` supports management of multiple progress bars with the `MultiProgress` class. 
+
+`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() {
+
+  // Configure first progress bar
+  indicators::ProgressBar bar1;
+  bar1.set_bar_width(50);
+  bar1.start_bar_with("[");
+  bar1.fill_bar_progress_with("■");
+  bar1.lead_bar_progress_with("■");
+  bar1.fill_bar_remainder_with(" ");
+  bar1.end_bar_with(" ]");
+  bar1.set_foreground_color(indicators::Color::YELLOW);
+  bar1.show_elapsed_time();
+  bar1.show_remaining_time();
+  bar1.set_prefix_text("Progress Bar #1 ");
+
+  // Configure second progress bar
+  indicators::ProgressBar bar2;
+  bar2.set_bar_width(50);
+  bar2.start_bar_with("[");
+  bar2.fill_bar_progress_with("=");
+  bar2.lead_bar_progress_with(">");
+  bar2.fill_bar_remainder_with(" ");
+  bar2.end_bar_with(" ]");
+  bar2.set_foreground_color(indicators::Color::CYAN);
+  bar2.show_elapsed_time();
+  bar2.show_remaining_time();
+  bar2.set_prefix_text("Progress Bar #2 ");
+
+  // Configure third progress bar
+  indicators::ProgressBar bar3;
+  bar3.set_bar_width(50);
+  bar3.start_bar_with("[");
+  bar3.fill_bar_progress_with("#");
+  bar3.lead_bar_progress_with("#");
+  bar3.fill_bar_remainder_with(" ");
+  bar3.end_bar_with(" ]");
+  bar3.set_foreground_color(indicators::Color::RED);
+  bar3.show_elapsed_time();
+  bar3.show_remaining_time();
+  bar3.set_prefix_text("Progress Bar #3 ");
+
+  // Construct MultiProgress object
+  indicators::MultiProgress<indicators::ProgressBar, 3> bars;
+  bars.insert<0>(bar1);
+  bars.insert<1>(bar2);
+  bars.insert<2>(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>
 
@@ -321,7 +375,7 @@ int main() {
         spinner.hide_spinner();
         spinner.hide_percentage();
         spinner.set_postfix_text("Authenticated!");
-        spinner.mark_as_completed();
+        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 indica::indica)

include/indicators/block_progress_bar.hpp

@@ -25,15 +25,18 @@ OUT OF OR IN CONNECTION WITH THE SOFTWARE  OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
 */
 #pragma once
+#define NOMINMAX
 #include <algorithm>
 #include <atomic>
+#include <chrono>
+#include <cmath>
 #include <indicators/color.hpp>
+#include <iomanip>
 #include <iostream>
 #include <mutex>
 #include <string>
 #include <thread>
 #include <vector>
-#include <cmath>
 
 namespace indicators {
 
@@ -75,11 +78,20 @@ public:
 
   void hide_percentage() { _show_percentage = false; }
 
+  void show_elapsed_time() { _show_elapsed_time = true; }
+
+  void hide_elapsed_time() { _show_elapsed_time = false; }
+
+  void show_remaining_time() { _show_remaining_time = true; }
+
+  void hide_remaining_time() { _show_remaining_time = false; }
+
   void set_progress(float value) {
     {
       std::unique_lock<std::mutex> lock{_mutex};
       _progress = value;
     }
+    _save_start_time();
     _print_progress();
   }
 
@@ -88,12 +100,11 @@ public:
       std::unique_lock<std::mutex> lock{_mutex};
       _progress += 1;
     }
+    _save_start_time();
     _print_progress();
   }
 
-  size_t current() {
-    return std::min(static_cast<size_t>(_progress), size_t(100));
-  }
+  size_t current() { return std::min(static_cast<size_t>(_progress), size_t(100)); }
 
   bool is_completed() const { return _completed; }
 
@@ -115,11 +126,56 @@ private:
   std::atomic<size_t> _max_postfix_text_length{0};
   std::atomic<bool> _completed{false};
   std::atomic<bool> _show_percentage{true};
+  std::atomic<bool> _show_elapsed_time{false};
+  std::atomic<bool> _show_remaining_time{false};
+  std::atomic<bool> _saved_start_time{false};
+  std::chrono::time_point<std::chrono::high_resolution_clock> _start_time_point;
   std::mutex _mutex;
-  Color _foreground_color;
+  Color _foreground_color{indicators::Color::WHITE};
 
-  void _print_progress() {
+  template <typename Indicator, size_t count> friend class MultiProgress;
+  std::atomic<bool> _multi_progress_mode{false};
+
+  std::ostream &_print_duration(std::ostream &os, std::chrono::nanoseconds ns) {
+    using namespace std;
+    using namespace std::chrono;
+    typedef duration<int, ratio<86400>> days;
+    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;
+  };
+
+  void _save_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(bool from_multi_progress = false) {
+    if (_multi_progress_mode && !from_multi_progress) {
+      if (_progress > 100.0) {
+        _completed = true;
+      }
+      return;
+    }
     std::unique_lock<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:
@@ -155,7 +211,7 @@ private:
     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];
+    _lead = lead_characters[size_t(part_width)];
     if ((_bar_width - whole_width - 1) < 0)
       _lead = "";
     for (size_t i = 0; i < whole_width; ++i)
@@ -163,11 +219,32 @@ private:
     std::cout << _lead;
     for (size_t i = 0; i < (_bar_width - whole_width - 1); ++i)
       std::cout << " ";
-    
+
     std::cout << _end;
     if (_show_percentage) {
       std::cout << " " << std::min(static_cast<size_t>(_progress), size_t(100)) << "%";
     }
+
+    if (_show_elapsed_time) {
+      std::cout << " [";
+      _print_duration(std::cout, elapsed);
+    }
+
+    if (_show_remaining_time) {
+      if (_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);
+      _print_duration(std::cout, remaining);
+      std::cout << "]";
+    } else {
+      if (_show_elapsed_time)
+        std::cout << "]";
+    }
+
     if (_max_postfix_text_length == 0)
       _max_postfix_text_length = 10;
     std::cout << " " << _postfix_text << std::string(_max_postfix_text_length, ' ') << "\r";
@@ -175,7 +252,7 @@ private:
     if (_progress > 100.0) {
       _completed = true;
     }
-    if (_completed)
+    if (_completed && !from_multi_progress) // Don't std::endl if calling from MultiProgress
       std::cout << termcolor::reset << std::endl;
   }
 };

include/indicators/multi_progress.hpp

@@ -0,0 +1,92 @@
+/*
+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:
+  MultiProgress() { _bars.reserve(count); }
+
+  template <size_t index>
+  typename std::enable_if<(index < count), void>::type insert(Indicator &bar) {
+    _bars.insert(_bars.begin() + index, 1, bar);
+    bar._multi_progress_mode = true;
+  }
+
+  template <size_t index>
+  typename std::enable_if<(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 < 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 < 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::unique_lock<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

@@ -25,9 +25,13 @@ OUT OF OR IN CONNECTION WITH THE SOFTWARE  OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
 */
 #pragma once
+#define NOMINMAX
 #include <algorithm>
 #include <atomic>
+#include <chrono>
+#include <cmath>
 #include <indicators/color.hpp>
+#include <iomanip>
 #include <iostream>
 #include <mutex>
 #include <string>
@@ -88,11 +92,20 @@ public:
 
   void hide_percentage() { _show_percentage = false; }
 
+  void show_elapsed_time() { _show_elapsed_time = true; }
+
+  void hide_elapsed_time() { _show_elapsed_time = false; }
+
+  void show_remaining_time() { _show_remaining_time = true; }
+
+  void hide_remaining_time() { _show_remaining_time = false; }
+
   void set_progress(float value) {
     {
       std::unique_lock<std::mutex> lock{_mutex};
       _progress = value;
     }
+    _save_start_time();
     _print_progress();
   }
 
@@ -101,12 +114,11 @@ public:
       std::unique_lock<std::mutex> lock{_mutex};
       _progress += 1;
     }
+    _save_start_time();
     _print_progress();
   }
 
-  size_t current() {
-    return std::min(static_cast<size_t>(_progress), size_t(100));
-  }
+  size_t current() { return std::min(static_cast<size_t>(_progress), size_t(100)); }
 
   bool is_completed() const { return _completed; }
 
@@ -128,11 +140,56 @@ private:
   std::atomic<size_t> _max_postfix_text_length{0};
   std::atomic<bool> _completed{false};
   std::atomic<bool> _show_percentage{true};
+  std::atomic<bool> _show_elapsed_time{false};
+  std::atomic<bool> _show_remaining_time{false};
+  std::atomic<bool> _saved_start_time{false};
+  std::chrono::time_point<std::chrono::high_resolution_clock> _start_time_point;
   std::mutex _mutex;
-  Color _foreground_color;
+  Color _foreground_color{indicators::Color::WHITE};
 
-  void _print_progress() {
+  template <typename Indicator, size_t count> friend class MultiProgress;
+  std::atomic<bool> _multi_progress_mode{false};
+
+  std::ostream &_print_duration(std::ostream &os, std::chrono::nanoseconds ns) {
+    using namespace std;
+    using namespace std::chrono;
+    typedef duration<int, ratio<86400>> days;
+    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;
+  };
+
+  void _save_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(bool from_multi_progress = false) {
+    if (_multi_progress_mode && !from_multi_progress) {
+      if (_progress > 100.0) {
+        _completed = true;
+      }
+      return;
+    }
     std::unique_lock<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:
@@ -175,6 +232,27 @@ private:
     if (_show_percentage) {
       std::cout << " " << std::min(static_cast<size_t>(_progress), size_t(100)) << "%";
     }
+
+    if (_show_elapsed_time) {
+      std::cout << " [";
+      _print_duration(std::cout, elapsed);
+    }
+
+    if (_show_remaining_time) {
+      if (_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);
+      _print_duration(std::cout, remaining);
+      std::cout << "]";
+    } else {
+      if (_show_elapsed_time)
+        std::cout << "]";
+    }
+
     if (_max_postfix_text_length == 0)
       _max_postfix_text_length = 10;
     std::cout << " " << _postfix_text << std::string(_max_postfix_text_length, ' ') << "\r";
@@ -182,7 +260,7 @@ private:
     if (_progress > 100.0) {
       _completed = true;
     }
-    if (_completed)
+    if (_completed && !from_multi_progress) // Don't std::endl if calling from MultiProgress
       std::cout << termcolor::reset << std::endl;
   }
 };

include/indicators/progress_spinner.hpp

@@ -25,9 +25,13 @@ OUT OF OR IN CONNECTION WITH THE SOFTWARE  OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
 */
 #pragma once
+#define NOMINMAX
 #include <algorithm>
 #include <atomic>
+#include <chrono>
+#include <cmath>
 #include <indicators/color.hpp>
+#include <iomanip>
 #include <iostream>
 #include <mutex>
 #include <string>
@@ -59,6 +63,14 @@ public:
 
   void hide_percentage() { _show_percentage = false; }
 
+  void show_elapsed_time() { _show_elapsed_time = true; }
+
+  void hide_elapsed_time() { _show_elapsed_time = false; }
+
+  void show_remaining_time() { _show_remaining_time = true; }
+
+  void hide_remaining_time() { _show_remaining_time = false; }
+
   void show_spinner() { _show_spinner = true; }
 
   void hide_spinner() { _show_spinner = false; }
@@ -68,6 +80,7 @@ public:
       std::unique_lock<std::mutex> lock{_mutex};
       _progress = value;
     }
+    _save_start_time();
     _print_progress();
   }
 
@@ -76,12 +89,11 @@ public:
       std::unique_lock<std::mutex> lock{_mutex};
       _progress += 1;
     }
+    _save_start_time();
     _print_progress();
   }
 
-  size_t current() {
-    return std::min(static_cast<size_t>(_progress), size_t(100));
-  }
+  size_t current() { return std::min(static_cast<size_t>(_progress), size_t(100)); }
 
   bool is_completed() const { return _completed; }
 
@@ -104,12 +116,48 @@ private:
   std::atomic<size_t> _max_postfix_text_length{0};
   std::atomic<bool> _completed{false};
   std::atomic<bool> _show_percentage{true};
+  std::atomic<bool> _show_elapsed_time{false};
+  std::atomic<bool> _show_remaining_time{false};
+  std::atomic<bool> _saved_start_time{false};
+  std::chrono::time_point<std::chrono::high_resolution_clock> _start_time_point;
   std::atomic<bool> _show_spinner{true};
   std::mutex _mutex;
   Color _foreground_color;
 
+  std::ostream &_print_duration(std::ostream &os, std::chrono::nanoseconds ns) {
+    using namespace std;
+    using namespace std::chrono;
+    typedef duration<int, ratio<86400>> days;
+    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;
+  };
+
+  void _save_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};
+    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:
@@ -143,6 +191,27 @@ private:
     if (_show_percentage) {
       std::cout << " " << std::min(static_cast<size_t>(_progress), size_t(100)) << "%";
     }
+
+    if (_show_elapsed_time) {
+      std::cout << " [";
+      _print_duration(std::cout, elapsed);
+    }
+
+    if (_show_remaining_time) {
+      if (_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);
+      _print_duration(std::cout, remaining);
+      std::cout << "]";
+    } else {
+      if (_show_elapsed_time)
+        std::cout << "]";
+    }
+
     if (_max_postfix_text_length == 0)
       _max_postfix_text_length = 10;
     std::cout << " " << _postfix_text << std::string(_max_postfix_text_length, ' ') << "\r";

samples/CMakeLists.txt

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

samples/block_progress_bar.cpp

@@ -1,20 +1,20 @@
+#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); 
-  
+  bar.set_foreground_color(indicators::Color::WHITE);
+
   // Update bar state
   auto progress = 0.0f;
   while (true) {
@@ -26,7 +26,7 @@ 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() {
+
+  indicators::BlockProgressBar bar1;
+  bar1.set_bar_width(50);
+  bar1.set_foreground_color(indicators::Color::YELLOW);
+  bar1.show_elapsed_time();
+  bar1.show_remaining_time();
+  bar1.set_prefix_text("Progress Bar #1 ");
+
+  indicators::BlockProgressBar bar2;
+  bar2.set_bar_width(50);
+  bar2.set_foreground_color(indicators::Color::CYAN);
+  bar2.show_elapsed_time();
+  bar2.show_remaining_time();
+  bar2.set_prefix_text("Progress Bar #2 ");
+
+  indicators::BlockProgressBar bar3;
+  bar3.set_bar_width(50);
+  bar3.set_foreground_color(indicators::Color::RED);
+  bar3.show_elapsed_time();
+  bar3.show_remaining_time();
+  bar3.set_prefix_text("Progress Bar #3 ");
+
+  indicators::MultiProgress<indicators::BlockProgressBar, 3> bars;
+  bars.insert<0>(bar1);
+  bars.insert<1>(bar2);
+  bars.insert<2>(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;
+  bar1.set_bar_width(50);
+  bar1.start_bar_with("[");
+  bar1.fill_bar_progress_with("■");
+  bar1.lead_bar_progress_with("■");
+  bar1.fill_bar_remainder_with(" ");
+  bar1.end_bar_with(" ]");
+  bar1.set_foreground_color(indicators::Color::YELLOW);
+  bar1.show_elapsed_time();
+  bar1.show_remaining_time();
+  bar1.set_prefix_text("Progress Bar #1 ");
+
+  indicators::ProgressBar bar2;
+  bar2.set_bar_width(50);
+  bar2.start_bar_with("[");
+  bar2.fill_bar_progress_with("=");
+  bar2.lead_bar_progress_with(">");
+  bar2.fill_bar_remainder_with(" ");
+  bar2.end_bar_with(" ]");
+  bar2.set_foreground_color(indicators::Color::CYAN);
+  bar2.show_elapsed_time();
+  bar2.show_remaining_time();
+  bar2.set_prefix_text("Progress Bar #2 ");
+
+  indicators::ProgressBar bar3;
+  bar3.set_bar_width(50);
+  bar3.start_bar_with("[");
+  bar3.fill_bar_progress_with("#");
+  bar3.lead_bar_progress_with("#");
+  bar3.fill_bar_remainder_with(" ");
+  bar3.end_bar_with(" ]");
+  bar3.set_foreground_color(indicators::Color::RED);
+  bar3.show_elapsed_time();
+  bar3.show_remaining_time();
+  bar3.set_prefix_text("Progress Bar #3 ");
+
+  indicators::MultiProgress<indicators::ProgressBar, 3> bars;
+  bars.insert<0>(bar1);
+  bars.insert<1>(bar2);
+  bars.insert<2>(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 +1,60 @@
+#include <indicators/progress_bar.hpp>
+#include <vector>
+
+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));
+    }
+  };
+
+  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 +1,52 @@
+#include <chrono>
+#include <indicators/progress_bar.hpp>
+#include <thread>
+
+int main() {
+
+  // Hide cursor
+  std::cout << "\e[?25l";
+
+  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("Loading dependency 1/4");  
+  bar.set_foreground_color(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_postfix_text("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_postfix_text("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_postfix_text("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 +1,27 @@
+#include <chrono>
+#include <indicators/progress_bar.hpp>
+#include <thread>
+
+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
+  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 +1,38 @@
+#include <indicators/progress_spinner.hpp>
+
+int main() {
+
+  // Hide cursor
+  std::cout << "\e[?25l";
+
+  indicators::ProgressSpinner spinner;
+
+  // Configure the spinner
+  spinner.set_postfix_text("Checking credentials");
+  spinner.set_foreground_color(indicators::Color::YELLOW);
+  spinner.set_spinner_states({"⠈", "⠐", "⠠", "⢀", "⡀", "⠄", "⠂", "⠁"});
+
+  // 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();
+        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 +1,34 @@
+#include <chrono>
+#include <indicators/progress_bar.hpp>
+#include <thread>
+
+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_prefix_text("Training Gaze Network 👀");
+  bar.set_foreground_color(indicators::Color::YELLOW);
+
+  // Show time elapsed and remaining
+  bar.show_elapsed_time();
+  bar.show_remaining_time();
+
+  // 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;
+}