add trackbar 'sub-consumer' for value label refresh when 'change-on-release'

src/graphics/ui/elements/TrackBar.cpp

@@ -50,6 +50,10 @@ void TrackBar::setConsumer(doubleconsumer consumer) {
     this->consumer = std::move(consumer);
 }
 
+void TrackBar::setSubConsumer(doubleconsumer consumer) {
+    this->subconsumer = std::move(consumer);
+}
+
 void TrackBar::mouseMove(GUI*, int x, int) {
     glm::vec2 pos = calcPos();
     value = x - trackWidth/2;
@@ -63,6 +67,9 @@ void TrackBar::mouseMove(GUI*, int x, int) {
     if (consumer && !changeOnRelease) {
         consumer(value);
     }
+    if (subconsumer) {
+        subconsumer(value);
+    }
 }
 
 void TrackBar::mouseRelease(GUI*, int, int) {

src/graphics/ui/elements/TrackBar.hpp

@@ -2,6 +2,7 @@
 #define GRAPHICS_UI_ELEMENTS_TRACKBAR_HPP_
 
 #include "UINode.hpp"
+#include "../../../data/dynamic_fwd.hpp"
 
 namespace gui {
     class TrackBar : public UINode {
@@ -9,6 +10,7 @@ namespace gui {
         glm::vec4 trackColor {1.0f, 1.0f, 1.0f, 0.4f};
         doublesupplier supplier = nullptr;
         doubleconsumer consumer = nullptr;
+        doubleconsumer subconsumer = nullptr;
         double min;
         double max;
         double value;
@@ -23,8 +25,9 @@ namespace gui {
                  int trackWidth=12);
         virtual void draw(const DrawContext* pctx, Assets* assets) override;
 
-        virtual void setSupplier(doublesupplier supplier);
-        virtual void setConsumer(doubleconsumer consumer);
+        virtual void setSupplier(doublesupplier);
+        virtual void setConsumer(doubleconsumer);
+        virtual void setSubConsumer(doubleconsumer);
 
         virtual void mouseMove(GUI*, int x, int y) override;
         virtual void mouseRelease(GUI*, int x, int y) override;

src/graphics/ui/gui_xml.cpp

@@ -392,26 +392,26 @@ static std::shared_ptr<UINode> readImage(UiXmlReader& reader, const xml::xmlelem
 }
 
 static std::shared_ptr<UINode> readTrackBar(UiXmlReader& reader, const xml::xmlelement& element) {
-    float min = element->attr("min", "0.0").asFloat();
-    float max = element->attr("max", "1.0").asFloat();
+    const auto& env = reader.getEnvironment();
+    const auto& file = reader.getFilename();
+    float minv = element->attr("min", "0.0").asFloat();
+    float maxv = element->attr("max", "1.0").asFloat();
     float def = element->attr("value", "0.0").asFloat();
     float step = element->attr("step", "1.0").asFloat();
     int trackWidth = element->attr("track-width", "12").asInt();
-    auto bar = std::make_shared<TrackBar>(min, max, def, step, trackWidth);
+    auto bar = std::make_shared<TrackBar>(minv, maxv, def, step, trackWidth);
     _readUINode(reader, element, *bar);
     if (element->has("consumer")) {
         bar->setConsumer(scripting::create_number_consumer(
-            reader.getEnvironment(),
-            element->attr("consumer").getText(),
-            reader.getFilename()
-        ));
+            env, element->attr("consumer").getText(), file));
+    }
+    if (element->has("sub-consumer")) {
+        bar->setSubConsumer(scripting::create_number_consumer(
+            env, element->attr("sub-consumer").getText(), file));
     }
     if (element->has("supplier")) {
         bar->setSupplier(scripting::create_number_supplier(
-            reader.getEnvironment(),
-            element->attr("supplier").getText(),
-            reader.getFilename()
-        ));
+            env, element->attr("supplier").getText(), file));
     }
     if (element->has("track-color")) {
         bar->setTrackColor(element->attr("track-color").asColor());