improved text display of time with 3 modes depending on the needs.

GstToolkit.cpp

@@ -4,19 +4,26 @@ using namespace std;
 
 #include "GstToolkit.h"
 
-string GstToolkit::time_to_string(guint64 t, bool stripped)
+string GstToolkit::time_to_string(guint64 t, time_string_mode m)
 {
-    if (t == GST_CLOCK_TIME_NONE)
-        return "00:00:00.00";
+    if (t == GST_CLOCK_TIME_NONE) {
+        switch (m) {
+        case TIME_STRING_FIXED:
+            return "00:00:00.00";
+        case TIME_STRING_MINIMAL:
+            return "0.0";
+        default:
+            return "00.00";
+        }
+    }
 
     guint ms =  GST_TIME_AS_MSECONDS(t);
     guint s = ms / 1000;
-
     ostringstream oss;
 
-    if (stripped) {
+    // MINIMAL: keep only the 2 higher values (most significant)
+    if (m == TIME_STRING_MINIMAL) {
         int count = 0;
-
         if (s / 3600) {
             oss << s / 3600 << ':';
             count++;
@@ -31,19 +38,18 @@ string GstToolkit::time_to_string(guint64 t, bool stripped)
         }
         if (count < 2 )
             oss << '.'<< setw(1) << setfill('0') << (ms % 1000) / 10;
-
     }
     else {
-        if (s / 3600)
+        // TIME_STRING_FIXED : fixed length string (11 chars) HH:mm:ss.ii"
+        // TIME_STRING_RIGHT : always show the right part (seconds), not the min or hours if none
+        if (m == TIME_STRING_FIXED || (s / 3600) )
             oss << setw(2) << setfill('0') << s / 3600 << ':';
-        if ((s % 3600) / 60)
+        if (m == TIME_STRING_FIXED || ((s % 3600) / 60) )
             oss << setw(2) << setfill('0') << (s % 3600) / 60 << ':';
         oss << setw(2) << setfill('0') << (s % 3600) % 60 << '.';
         oss << setw(2) << setfill('0') << (ms % 1000) / 10;
     }
 
-    // non-stripped : fixed length string (11 chars) HH:mm:ss.ii"
-    // stripped : adapted to precision
     return oss.str();
 }
 

GstToolkit.h

@@ -9,13 +9,19 @@
 namespace GstToolkit
 {
 
-    std::string time_to_string(guint64 t, bool stripped = false);
+typedef enum {
+    TIME_STRING_FIXED = 0,
+    TIME_STRING_ADJUSTED,
+    TIME_STRING_MINIMAL
+} time_string_mode;
 
-    std::string gst_version();
-    std::list<std::string> all_plugins();
-    std::list<std::string> all_plugin_features(std::string pluginname);
+std::string time_to_string(guint64 t, time_string_mode m = TIME_STRING_ADJUSTED);
 
-    bool enable_feature (std::string name, bool enable);
+std::string gst_version();
+std::list<std::string> all_plugins();
+std::list<std::string> all_plugin_features(std::string pluginname);
+
+bool enable_feature (std::string name, bool enable);
 
 }
 

ImGuiToolkit.cpp

@@ -400,22 +400,25 @@ bool ImGuiToolkit::TimelineSlider(const char* label, guint64 *time, guint64 dura
     ImVec2 maxi = ImVec2(0.f, 0.f);
 
     // render text duration
-    ImFormatString(overlay_buf, IM_ARRAYSIZE(overlay_buf), "%s", GstToolkit::time_to_string(duration).c_str());
+    ImFormatString(overlay_buf, IM_ARRAYSIZE(overlay_buf), "%s",
+                   GstToolkit::time_to_string(duration, GstToolkit::TIME_STRING_MINIMAL).c_str());
     overlay_size = ImGui::CalcTextSize(overlay_buf, NULL);
     ImVec2 duration_label = bbox.GetBR() - overlay_size - ImVec2(3.f, 3.f);
     if (overlay_size.x > 0.0f)
         ImGui::RenderTextClipped( duration_label, bbox.Max, overlay_buf, NULL, &overlay_size);
 
-
+    // render tick marks
     while ( tick < duration)
     {
-        // large tick mark every large tick
+        // large tick mark
         float tick_length = !(tick%large_tick_step) ? fontsize - style.FramePadding.y : style.FramePadding.y;
 
+        // label tick mark
         if ( !(tick%label_tick_step) ) {
             tick_length = fontsize;
 
-            ImFormatString(overlay_buf, IM_ARRAYSIZE(overlay_buf), "%s", GstToolkit::time_to_string(tick, true).c_str());
+            ImFormatString(overlay_buf, IM_ARRAYSIZE(overlay_buf), "%s",
+                           GstToolkit::time_to_string(tick, GstToolkit::TIME_STRING_MINIMAL).c_str());
             overlay_size = ImGui::CalcTextSize(overlay_buf, NULL);
             mini = ImVec2( pos.x - overlay_size.x / 2.f, pos.y + tick_length );
             maxi = ImVec2( pos.x + overlay_size.x / 2.f, pos.y + tick_length + overlay_size.y );
@@ -424,7 +427,7 @@ bool ImGuiToolkit::TimelineSlider(const char* label, guint64 *time, guint64 dura
                 ImGui::RenderTextClipped(mini, maxi, overlay_buf, NULL, &overlay_size);
         }
 
-        // draw a tick mark each step 
+        // draw the tick mark each step
         window->DrawList->AddLine( pos, pos + ImVec2(0.f, tick_length), color);
 
         // next tick

UserInterfaceManager.cpp

@@ -1168,7 +1168,7 @@ void MediaController::Render()
             // display time
             ImGuiToolkit::PushFont(ImGuiToolkit::FONT_LARGE);
             ImGui::SetCursorPos( ImVec2(return_to_pos.x + 5, return_to_pos.y - ImGui::GetTextLineHeightWithSpacing()) );
-            ImGui::Text("%s", GstToolkit::time_to_string(mp_->position()).c_str());
+            ImGui::Text("%s", GstToolkit::time_to_string(mp_->position(), GstToolkit::TIME_STRING_FIXED).c_str());
             ImGui::PopFont();
 
             ImGui::SetCursorPos(return_to_pos);