Add clipping capabilities to overlay scripting api

include/ui/mapview.h

@@ -32,6 +32,10 @@ public:
     Q_INVOKABLE void setX(int x);
     Q_INVOKABLE void setY(int y, int layer);
     Q_INVOKABLE void setY(int y);
+    Q_INVOKABLE void setClippingRect(int x, int y, int width, int height, int layer);
+    Q_INVOKABLE void setClippingRect(int x, int y, int width, int height);
+    Q_INVOKABLE void clearClippingRect(int layer);
+    Q_INVOKABLE void clearClippingRect();
     Q_INVOKABLE QJSValue getPosition(int layer = 0);
     Q_INVOKABLE void setPosition(int x, int y, int layer);
     Q_INVOKABLE void setPosition(int x, int y);

include/ui/overlay.h

@@ -76,6 +76,7 @@ public:
         this->y = 0;
         this->hidden = false;
         this->opacity = 1.0;
+        this->clippingRect = nullptr;
     }
     ~Overlay() {
         this->clearItems();
@@ -88,6 +89,8 @@ public:
     int getY();
     void setX(int x);
     void setY(int y);
+    void setClippingRect(QRectF rect);
+    void clearClippingRect();
     void setPosition(int x, int y);
     void move(int deltaX, int deltaY);
     void renderItems(QPainter *painter);
@@ -103,6 +106,7 @@ private:
     int y;
     bool hidden;
     qreal opacity;
+    QRectF *clippingRect;
 };
 
 #endif // OVERLAY_H

src/scriptapi/apioverlay.cpp

@@ -79,6 +79,29 @@ void MapView::setY(int y) {
     this->scene()->update();
 }
 
+void MapView::setClippingRect(int x, int y, int width, int height, int layer) {
+    this->getOverlay(layer)->setClippingRect(QRectF(x, y, width, height));
+    this->scene()->update();
+}
+
+void MapView::setClippingRect(int x, int y, int width, int height) {
+    QRectF rect = QRectF(x, y, width, height);
+    foreach (Overlay * layer, this->overlayMap)
+        layer->setClippingRect(rect);
+    this->scene()->update();
+}
+
+void MapView::clearClippingRect(int layer) {
+    this->getOverlay(layer)->clearClippingRect();
+    this->scene()->update();
+}
+
+void MapView::clearClippingRect() {
+    foreach (Overlay * layer, this->overlayMap)
+        layer->clearClippingRect();
+    this->scene()->update();
+}
+
 QJSValue MapView::getPosition(int layer) {
     Overlay * overlay = this->getOverlay(layer);
     return Scripting::position(overlay->getX(), overlay->getY());

src/ui/overlay.cpp

@@ -26,11 +26,20 @@ void OverlayImage::render(QPainter *painter, int x, int y) {
 void Overlay::renderItems(QPainter *painter) {
     if (this->hidden) return;
 
+    if (this->clippingRect) {
+        painter->setClipping(true);
+        painter->setClipRect(*this->clippingRect);
+    }
+
     qreal oldOpacity = painter->opacity();
     painter->setOpacity(this->opacity);
     for (auto item : this->items)
         item->render(painter, this->x, this->y);
     painter->setOpacity(oldOpacity);
+
+    if (this->clippingRect) {
+        painter->setClipping(false);
+    }
 }
 
 void Overlay::clearItems() {
@@ -80,6 +89,20 @@ void Overlay::setY(int y) {
     this->y = y;
 }
 
+void Overlay::setClippingRect(QRectF rect) {
+    if (this->clippingRect) {
+        delete this->clippingRect;
+    }
+    this->clippingRect = new QRectF(rect);
+}
+
+void Overlay::clearClippingRect() {
+    if (this->clippingRect) {
+        delete this->clippingRect;
+    }
+    this->clippingRect = nullptr;
+}
+
 void Overlay::setPosition(int x, int y) {
     this->x = x;
     this->y = y;