Add Back Button function for layers

loader/include/Geode/ui/General.hpp

@@ -97,4 +97,24 @@ namespace geode {
         );
         void setContentSize(cocos2d::CCSize const& size) override;
     };
+
+    enum class BackButtonStyle {
+        Green,
+        Blue,
+        Pink
+    };
+
+    /**
+     * Add a back button to a layer
+     * @param to Layer to add back button to
+     * @param target Target to call selector on
+     * @param selector Selector to call on button press
+     * @param style Style of button to use
+     */
+    GEODE_DLL void addBackButton(
+        cocos2d::CCNode* to,
+        cocos2d::CCObject* target,
+        cocos2d::SEL_MenuHandler selector,
+        BackButtonStyle style = BackButtonStyle::Green
+    );
 }

loader/src/ui/nodes/General.cpp

@@ -200,3 +200,27 @@ void ListBorders::setContentSize(CCSize const& size) {
     m_left->setScaleY((size.height - height) / m_left->getContentHeight());
     m_right->setScaleY((size.height - height) / m_right->getContentHeight());
 }
+
+void geode::addBackButton(cocos2d::CCNode* to, cocos2d::CCObject* target, cocos2d::SEL_MenuHandler selector, BackButtonStyle style) {
+    const char* sprite;
+    switch (style) {
+    default:
+    case BackButtonStyle::Green: sprite = "GJ_arrow_01_001.png"; break;
+    case BackButtonStyle::Blue: sprite = "GJ_arrow_02_001.png"; break;
+    case BackButtonStyle::Pink: sprite = "GJ_arrow_03_001.png"; break;
+    }
+
+    auto backBtn = CCMenuItemSpriteExtra::create(
+        CCSprite::createWithSpriteFrameName(sprite),
+        target,
+        selector
+    );
+    backBtn->setID("back-button");
+    backBtn->setZOrder(1);
+
+    auto menu = CCMenu::createWithItem(backBtn);
+    menu->setID("back-menu");
+    menu->setPosition({ 25.0f, CCDirector::get()->getWinSize().height - 25.0f });
+    menu->setZOrder(1);
+    to->addChild(menu);
+}