Add OverlayManager

loader/include/Geode/ui/OverlayManager.hpp

@@ -0,0 +1,41 @@
+#pragma once
+
+#include "../DefaultInclude.hpp"
+
+#include <cocos2d.h>
+#include <vector>
+#include <span>
+#include <Geode/utils/cocos.hpp>
+
+namespace geode
+{
+    /*
+    Because cocos only allows for one notification node (a node drawn last, above the fps counter and everything),
+    I added this, a simple class to add nodes to a general notification node so that mods dont interfere with each other.
+    */
+
+    class GEODE_DLL OverlayManager : private cocos2d::CCNode
+    {
+        private:
+            std::vector<cocos2d::CCNode*> nodes;
+
+        public:
+            /// @brief Get the overlay manager instance, and if it doesnt exist, sets the notification node to it
+            static OverlayManager* get();
+
+            /// @brief Adds a node to the overlay manager, overlays are sorted by ZOrder, the higher the order is the later it draws. This will retain the node
+            void addNode(cocos2d::CCNode* node);
+
+            /// @brief Removes a node from the overlay manager, stopping it from being drawn. This will release the node
+            void removeNode(cocos2d::CCNode* node);
+
+            /// @brief Util to get the highest ZOrder of all nodes
+            int getHighestOverlayZOrder();
+
+            /// @brief Util to get the lowest ZOrder of all nodes
+            int getLowestOverlayZOrder();
+
+            /// @brief Gets all the overlays
+            std::vector<cocos2d::CCNode*> getOverlays();
+    };
+};

loader/src/ui/nodes/OverlayManager.cpp

@@ -0,0 +1,62 @@
+#include <Geode/ui/OverlayManager.hpp>
+
+using namespace geode::prelude;
+
+OverlayManager* OverlayManager::get()
+{
+    static OverlayManager* instance;
+
+    if (!instance)
+    {
+        instance = new OverlayManager();
+
+        CCDirector::get()->setNotificationNode(instance);
+    }
+
+    return instance;
+}
+
+void OverlayManager::addNode(CCNode* node)
+{
+    this->addChild(node);
+
+    nodes.push_back(node);
+}
+
+void OverlayManager::removeNode(CCNode* node)
+{
+    this->removeChild(node);
+
+    std::erase(nodes, node);
+}
+
+int OverlayManager::getHighestOverlayZOrder()
+{
+    int z = INT_MIN;
+
+    for (auto node : nodes)
+    {
+        if (node->getZOrder() > z)
+            z = node->getZOrder();
+    }
+
+    return z;
+}
+
+int OverlayManager::getLowestOverlayZOrder()
+{
+    int z = INT_MAX;
+
+    for (auto node : nodes)
+    {
+        if (node->getZOrder() < z)
+            z = node->getZOrder();
+    }
+
+    return z;
+}
+
+std::vector<CCNode*> OverlayManager::getOverlays()
+{
+    return nodes;
+}