Added dynamic postfix text sample based on #56

include/indicators/block_progress_bar.hpp

@@ -8,8 +8,10 @@
 #include <atomic>
 #include <chrono>
 #include <indicators/setting.hpp>
+#include <indicators/terminal_size.hpp>
 #include <iomanip>
 #include <iostream>
+#include <sstream>
 #include <mutex>
 #include <string>
 #include <thread>
@@ -160,6 +162,12 @@ private:
     }
   }
 
+  size_t get_prefix_length() {
+    std::stringstream os;
+    os << get_value<details::ProgressBarOption::prefix_text>();
+    return os.str().size();
+  }
+
 public:
   void print_progress(bool from_multi_progress = false) {
     std::lock_guard<std::mutex> lock{mutex_};

include/indicators/progress_bar.hpp

@@ -9,6 +9,7 @@
 #include <cmath>
 #include <indicators/color.hpp>
 #include <indicators/setting.hpp>
+#include <indicators/terminal_size.hpp>
 #include <iomanip>
 #include <iostream>
 #include <sstream>

samples/CMakeLists.txt

@@ -44,3 +44,6 @@ target_link_libraries(max_progress PRIVATE indicators::indicators)
 add_executable(indeterminate_progress_bar indeterminate_progress_bar.cpp)
 target_link_libraries(indeterminate_progress_bar PRIVATE indicators::indicators)
 
+add_executable(dynamic_postfix_text dynamic_postfix_text.cpp)
+target_link_libraries(dynamic_postfix_text PRIVATE indicators::indicators)
+

samples/dynamic_postfix_text.cpp

@@ -0,0 +1,46 @@
+#include <indicators/progress_bar.hpp>
+#include <indicators/multi_progress.hpp>
+#include <indicators/terminal_size.hpp>
+using namespace indicators;
+
+int main() {
+
+    std::cout << "Terminal width: " << terminal_size().second << "\n";
+
+    // prepare progress bar
+    auto prepare_p = [](ProgressBar *p, const std::string &prefix){
+        p->set_option(option::PrefixText{prefix});
+        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::BarWidth{0});
+    };
+
+    ProgressBar p1, p2;
+
+    prepare_p(&p1, "Progress #1");
+    prepare_p(&p2, "Progress #2");
+
+    MultiProgress<ProgressBar, 2> mp(p1, p2);
+
+    std::string some_text[] = {"foo", "bar", "independence", "beta", "alfa"};
+    std::string dynamic_text;
+
+    // first pb with static postfix text
+    p1.set_option(option::PostfixText{"Static text"});
+
+    // second pb with dynamic postfix text
+    for (auto &t: some_text) {
+        dynamic_text += t + " ";
+        p2.set_option(option::PostfixText{dynamic_text});
+        mp.set_progress<0>(size_t(0));
+        std::this_thread::sleep_for(std::chrono::seconds(1));
+    }
+
+    // update postfix to little text for pb #2
+    p2.set_option(option::PostfixText{"abcd"});
+    mp.set_progress<0>(size_t(0));
+
+}

single_include/indicators/indicators.hpp

@@ -2516,6 +2516,14 @@ public:
     }
     os.flush();
 
+    // std::cout << "\n"
+    //           << prefix_length << " "
+    //           << start_length << " "
+    //           << bar_width << " "
+    //           << end_length << " "
+    //           << postfix_length << " "
+    //           << " = " << terminal_width << "\n";
+
     if ((type == ProgressType::incremental && progress_ >= max_progress) ||
         (type == ProgressType::decremental && progress_ <= min_progress)) {
       get_value<details::ProgressBarOption::completed>() = true;