Begin Repo

layers/layerstack.cpp

@@ -0,0 +1,77 @@
+#include "layerstack.h"
+#include "application.h"
+
+
+LayerStack::LayerStack() {
+
+    insert = layers.begin();
+}
+
+LayerStack::~LayerStack() {
+
+    for(Layer* layer : layers) {
+        delete layer;
+    }
+}
+
+void LayerStack::pushLayer(Layer* layer) {
+    layers.emplace(insert, layer);
+    layer->onAttach();
+}
+
+void LayerStack::pushOverlay(Layer* layer) {
+    layers.emplace_back(layer);
+    layer->onAttach();
+}
+
+void LayerStack::popLayer(Layer* layer) {
+    auto it = find(layers.begin(), layers.end(), layer);
+    if(it != layers.end()) {
+        layers.erase(it);
+        insert--;
+    }
+    layer->onDetach();
+}
+
+void LayerStack::popOverlay(Layer* layer) {
+    auto it = find(layers.begin(), layers.end(), layer);
+    if(it != layers.end()) {
+        layers.erase(it);
+    }
+    layer->onDetach();
+}
+
+void LayerStack::propagateEvent(const Event* e) {
+    eventHandled = false;
+    if(e == nullptr)
+        return;
+    else {
+        if(layers.size() > 0) {
+            for(int i = layers.size() - 1; i >= 0; i--) {
+                if(!eventHandled)
+                    eventHandled = layers.at(i)->onEvent(e);
+                else
+                    break;
+            }
+        }
+        delete e;
+    }
+}
+
+void LayerStack::updateLayers() {
+    if(layers.size() > 0) {
+        for(Layer* layer : layers) {
+            layer->onUpdate();
+        }
+    }
+}
+
+void LayerStack::shutdown() {
+    if(layers.size() > 0) {
+        for(Layer* layer : layers) {
+            popLayer(layer);
+            layer->onDetach();
+            delete layer;
+        }
+    }   
+}