Add opacity to scripting overlay

src/mainwindow_scriptapi.cpp

@@ -353,6 +353,26 @@ void MainWindow::moveOverlays(int deltaX, int deltaY) {
     this->ui->graphicsView_Map->scene()->update();
 }
 
+int MainWindow::getOverlayOpacity(int layer) {
+    if (!this->ui || !this->ui->graphicsView_Map)
+        return 0;
+    return this->ui->graphicsView_Map->getOverlay(layer)->getOpacity();
+}
+
+void MainWindow::setOverlayOpacity(int opacity, int layer) {
+    if (!this->ui || !this->ui->graphicsView_Map)
+        return;
+    this->ui->graphicsView_Map->getOverlay(layer)->setOpacity(opacity);
+    this->ui->graphicsView_Map->scene()->update();
+}
+
+void MainWindow::setOverlaysOpacity(int opacity) {
+    if (!this->ui || !this->ui->graphicsView_Map)
+        return;
+    this->ui->graphicsView_Map->setOverlaysOpacity(opacity);
+    this->ui->graphicsView_Map->scene()->update();
+}
+
 void MainWindow::addText(QString text, int x, int y, QString color, int fontSize, int layer) {
     if (!this->ui || !this->ui->graphicsView_Map)
         return;

src/ui/graphicsview.cpp

@@ -69,6 +69,11 @@ void MapView::setOverlaysPosition(int x, int y) {
         overlay->setPosition(x, y);
 }
 
+void MapView::setOverlaysOpacity(int opacity) {
+    foreach (Overlay * overlay, this->overlayMap)
+        overlay->setOpacity(opacity);
+}
+
 void MapView::moveOverlays(int deltaX, int deltaY) {
     foreach (Overlay * overlay, this->overlayMap)
         overlay->move(deltaX, deltaY);

src/ui/overlay.cpp

@@ -26,6 +26,7 @@ void OverlayImage::render(QPainter *painter, int x, int y) {
 void Overlay::renderItems(QPainter *painter) {
     if (this->hidden) return;
 
+    painter->setOpacity(this->opacity);
     for (auto item : this->items)
         item->render(painter, this->x, this->y);
 }
@@ -49,6 +50,18 @@ void Overlay::setHidden(bool hidden) {
     this->hidden = hidden;
 }
 
+int Overlay::getOpacity() {
+    return this->opacity * 100;
+}
+
+void Overlay::setOpacity(int opacity) {
+    if (opacity < 0 || opacity > 100) {
+        logError(QString("Invalid overlay opacity '%1'").arg(opacity));
+        return;
+    }
+    this->opacity = static_cast<qreal>(opacity) / 100;
+}
+
 int Overlay::getX() {
     return this->x;
 }