Totally refactored UILabel

src/dawn/scene/components/ui/UICanvas.cpp

@@ -5,6 +5,7 @@
 
 #include "UICanvas.hpp"
 #include "game/DawnGame.hpp"
+#include "UIComponent.hpp"
 
 using namespace Dawn;
 
@@ -13,10 +14,47 @@ UICanvas * UICanvas::create(Scene *scene) {
   return item->addComponent<UICanvas>();
 }
 
-UICanvas::UICanvas(SceneItem *item) : SceneItemComponent(item) {
+UICanvas::UICanvas(SceneItem *item) :
+  SceneItemComponent(item),
+  camera(nullptr)
+{
+}
+
+float_t UICanvas::getWidth() {
+  return w;
+}
+
+float_t UICanvas::getHeight() {
+  return h;
+}
+
+float_t UICanvas::getContentWidth() {
+  return this->getWidth();
+}
+
+float_t UICanvas::getContentHeight() {
+  return this->getHeight();
 }
 
 void UICanvas::onStart() {
+  if(camera == nullptr) camera = getScene()->findComponent<Camera>();
+
+  useEffectWithTeardown([&]{
+    if(camera == nullptr) return evtRenderResize = [&] {};
+    this->w = camera->getRenderTarget()->getWidth();
+    this->h = camera->getRenderTarget()->getHeight();
+    return evtRenderResize = useEvent([&](float_t w, float_t h){
+      this->w = w;
+      this->h = h;
+      
+      auto comps = this->item->findChildren<UIComponent>();
+      auto itComps = comps.begin();
+      while(itComps != comps.end()) {
+        (*itComps)->alignmentNeedsUpdating = true;
+        ++itComps;
+      }
+    }, camera->eventRenderTargetResized);
+  }, camera)();
 }
 
 void UICanvas::onDispose() {