Stop leaking scripting overlay

include/mainwindow.h

@@ -166,6 +166,7 @@ public slots:
     void on_mainTabBar_tabBarClicked(int index);
     void on_mapViewTab_tabBarClicked(int index);
     void onWarpBehaviorWarningClicked();
+    void clearOverlay();
 
 private slots:
     void on_action_Open_Project_triggered();

src/mainwindow.cpp

@@ -3081,6 +3081,11 @@ bool MainWindow::askToFixRegionMapEditor() {
     return false;
 }
 
+void MainWindow::clearOverlay() {
+    if (ui->graphicsView_Map)
+        ui->graphicsView_Map->clearOverlayMap();
+}
+
 // Attempt to close any open sub-windows of the main window, giving each a chance to abort the process.
 // Each of these windows is a widget with WA_DeleteOnClose set, so manually deleting them isn't necessary.
 // Because they're tracked with QPointers nullifying them shouldn't be necessary either, but it seems the

src/scriptapi/scripting.cpp

@@ -29,8 +29,6 @@ void Scripting::stop() {
 }
 
 void Scripting::init(MainWindow *mainWindow) {
-    if (mainWindow->ui->graphicsView_Map)
-        mainWindow->ui->graphicsView_Map->clearOverlayMap();
     Scripting::stop();
     instance = new Scripting(mainWindow);
 }
@@ -50,6 +48,7 @@ Scripting::Scripting(MainWindow *mainWindow) {
 }
 
 Scripting::~Scripting() {
+    if (mainWindow) mainWindow->clearOverlay();
     this->engine->setInterrupted(true);
     qDeleteAll(this->imageCache);
     delete this->engine;

src/ui/graphicsview.cpp

@@ -25,8 +25,9 @@ void GraphicsView::moveEvent(QMoveEvent *event) {
 }
 
 void MapView::drawForeground(QPainter *painter, const QRectF&) {
-    foreach (Overlay * overlay, this->overlayMap)
-        overlay->renderItems(painter);
+    for (auto i = this->overlayMap.constBegin(); i != this->overlayMap.constEnd(); i++) {
+        i.value()->renderItems(painter);
+    }
 
     if (!editor) return;
 
@@ -56,9 +57,8 @@ void MapView::drawForeground(QPainter *painter, const QRectF&) {
 }
 
 void MapView::clearOverlayMap() {
-    foreach (Overlay * overlay, this->overlayMap) {
-        overlay->clearItems();
-        delete overlay;
+    for (auto i = this->overlayMap.constBegin(); i != this->overlayMap.constEnd(); i++) {
+        delete i.value();
     }
     this->overlayMap.clear();
 }