Implement some overlay functions and on_map_opened callback

src/mainwindow.cpp

@@ -446,6 +446,8 @@ bool MainWindow::setMap(QString map_name, bool scrollTreeView) {
     setRecentMap(map_name);
     updateMapList();
     updateTilesetEditor();
+
+    Scripting::cb_MapOpened(map_name);
     return true;
 }
 
@@ -2714,3 +2716,33 @@ void MainWindow::setHeight(int height) {
     this->editor->map->commit();
     this->onMapNeedsRedrawing();
 }
+
+void MainWindow::clearOverlay() {
+    if (!this->ui || !this->ui->graphicsView_Map)
+        return;
+    this->ui->graphicsView_Map->overlay.clearItems();
+}
+
+void MainWindow::addText(QString text, int x, int y, QString color, int fontSize) {
+    if (!this->ui || !this->ui->graphicsView_Map)
+        return;
+    this->ui->graphicsView_Map->overlay.addText(text, x, y, color, fontSize);
+}
+
+void MainWindow::addRect(int x, int y, int width, int height, QString color) {
+    if (!this->ui || !this->ui->graphicsView_Map)
+        return;
+    this->ui->graphicsView_Map->overlay.addRect(x, y, width, height, color, false);
+}
+
+void MainWindow::addFilledRect(int x, int y, int width, int height, QString color) {
+    if (!this->ui || !this->ui->graphicsView_Map)
+        return;
+    this->ui->graphicsView_Map->overlay.addRect(x, y, width, height, color, true);
+}
+
+void MainWindow::addImage(int x, int y, QString filepath) {
+    if (!this->ui || !this->ui->graphicsView_Map)
+        return;
+    this->ui->graphicsView_Map->overlay.addImage(x, y, filepath);
+}

src/scripting.cpp

@@ -3,6 +3,7 @@
 
 QMap<CallbackType, QString> callbackFunctions = {
     {OnBlockChanged, "on_block_changed"},
+    {OnMapOpened, "on_map_opened"},
 };
 
 Scripting *instance = nullptr;
@@ -65,9 +66,18 @@ void Scripting::cb_MetatileChanged(int x, int y, Block prevBlock, Block newBlock
     instance->invokeCallback(OnBlockChanged, args);
 }
 
+void Scripting::cb_MapOpened(QString mapName) {
+    if (!instance) return;
+
+    QJSValueList args {
+        mapName,
+    };
+    instance->invokeCallback(OnMapOpened, args);
+}
+
 QJSValue Scripting::fromBlock(Block block) {
     QJSValue obj = instance->engine->newObject();
-    obj.setProperty("tile", block.tile);
+    obj.setProperty("metatileId", block.tile);
     obj.setProperty("collision", block.collision);
     obj.setProperty("elevation", block.elevation);
     obj.setProperty("rawValue", block.rawValue());

src/ui/graphicsview.cpp

@@ -15,3 +15,9 @@ void GraphicsView::mouseMoveEvent(QMouseEvent *event) {
 void GraphicsView::mouseReleaseEvent(QMouseEvent *event) {
     QGraphicsView::mouseReleaseEvent(event);
 }
+
+void GraphicsView::drawForeground(QPainter *painter, const QRectF &rect) {
+    for (auto item : this->overlay.getItems()) {
+        item->render(painter);
+    }
+}

src/ui/overlay.cpp

@@ -0,0 +1,46 @@
+#include "overlay.h"
+
+void OverlayText::render(QPainter *painter) {
+    QFont font = painter->font();
+    font.setPixelSize(this->fontSize);
+    painter->setFont(font);
+    painter->setPen(this->color);
+    painter->drawText(this->x, this->y, this->text);
+}
+
+void OverlayRect::render(QPainter *painter) {
+    if (this->filled) {
+        painter->fillRect(this->x, this->y, this->width, this->height, this->color);
+    } else {
+        painter->setPen(this->color);
+        painter->drawRect(this->x, this->y, this->width, this->height);
+    }
+}
+
+void OverlayImage::render(QPainter *painter) {
+    painter->drawImage(this->x, this->y, this->image);
+}
+
+void Overlay::clearItems() {
+    for (auto item : this->items) {
+        delete item;
+    }
+    this->items.clear();
+}
+
+QList<OverlayItem*> Overlay::getItems() {
+    return this->items;
+}
+
+void Overlay::addText(QString text, int x, int y, QString color, int fontSize) {
+    this->items.append(new OverlayText(text, x, y, QColor(color), fontSize));
+}
+
+void Overlay::addRect(int x, int y, int width, int height, QString color, bool filled) {
+    this->items.append(new OverlayRect(x, y, width, height, QColor(color), filled));
+}
+
+void Overlay::addImage(int x, int y, QString filepath) {
+    this->items.append(new OverlayImage(x, y, QImage(filepath)));
+}
+