gui: added UINode.zindex

src/frontend/gui/UINode.cpp

@@ -143,6 +143,14 @@ glm::vec4 UINode::getMargin() const {
     return margin;
 }
 
+void UINode::setZIndex(int zindex) {
+    this->zindex = zindex;
+}
+
+int UINode::getZIndex() const {
+    return zindex;
+}
+
 void UINode::lock() {
 }
 

src/frontend/gui/UINode.h

@@ -35,6 +35,7 @@ namespace gui {
         bool focused = false;
         bool interactive = true;
         bool resizing = true;
+        int zindex = 0;
         Align align = Align::left;
         UINode* parent = nullptr;
         UINode(glm::vec2 coord, glm::vec2 size);
@@ -68,6 +69,9 @@ namespace gui {
         virtual void setMargin(glm::vec4 margin);
         glm::vec4 getMargin() const;
 
+        virtual void setZIndex(int idx);
+        int getZIndex() const;
+
         virtual void focus(GUI*) {focused = true;}
         virtual void click(GUI*, int x, int y);
         virtual void clicked(GUI*, int button) {}

src/frontend/gui/gui_xml.cpp

@@ -37,6 +37,9 @@ static void _readUINode(xml::xmlelement element, UINode& node) {
     if (element->has("margin")) {
         node.setMargin(element->attr("margin").asVec4());
     }
+    if (element->has("z-index")) {
+        node.setZIndex(element->attr("z-index").asInt());
+    }
     std::string alignName = element->attr("align", "").getText();
     node.setAlign(align_from_string(alignName, node.getAlign()));
 }

src/frontend/gui/panels.cpp

@@ -144,6 +144,12 @@ void Container::setSize(glm::vec2 size) {
     refresh();
 }
 
+void Container::refresh() {
+    std::stable_sort(nodes.begin(), nodes.end(), [](const auto& a, const auto& b) {
+        return a->getZIndex() < b->getZIndex();
+    });
+}
+
 const std::vector<std::shared_ptr<UINode>>& Container::getNodes() const {
     return nodes;
 }
@@ -190,6 +196,7 @@ void Panel::add(std::shared_ptr<UINode> node) {
 }
 
 void Panel::refresh() {
+    UINode::refresh();
     float x = padding.x;
     float y = padding.y;
     vec2 size = getSize();

src/frontend/gui/panels.h

@@ -47,6 +47,7 @@ namespace gui {
         void listenInterval(float interval, ontimeout callback, int repeat=-1);
         virtual glm::vec2 contentOffset() override {return glm::vec2(0.0f, scroll);};
         virtual void setSize(glm::vec2 size) override;
+        virtual void refresh() override;
 
         const std::vector<std::shared_ptr<UINode>>& getNodes() const;
     };

src/frontend/hud.cpp

@@ -250,6 +250,8 @@ HudRenderer::HudRenderer(Engine* engine, LevelFrontend* frontend)
 
     debugPanel = createDebugPanel(engine);
     menu->reset();
+
+    debugPanel->setZIndex(1);
     
     gui->addBack(darkOverlay);
     gui->addBack(hotbarView);