Add path drawing to the API

include/ui/mapview.h

@@ -55,6 +55,7 @@ public:
     Q_INVOKABLE void addTileImage(int x, int y, int tileId, bool xflip, bool yflip, int paletteId, bool setTransparency = false, int layer = 0);
     Q_INVOKABLE void addTileImage(int x, int y, QJSValue tileObj, bool setTransparency = false, int layer = 0);
     Q_INVOKABLE void addMetatileImage(int x, int y, int metatileId, bool setTransparency = false, int layer = 0);
+    Q_INVOKABLE void addPath(QList<int> x, QList<int> y, QString color = "#000000", int layer = 0);
 
 private:
     QMap<int, Overlay*> overlayMap;

include/ui/overlay.h

@@ -70,6 +70,23 @@ private:
     QImage image;
 };
 
+class OverlayPath : public OverlayItem {
+public:
+    OverlayPath(QPainterPath path, QString color) {
+        this->prevX = 0;
+        this->prevY = 0;
+        this->path = path;
+        this->color = color;
+    }
+    ~OverlayPath() {}
+    virtual void render(QPainter *painter, int x, int y);
+private:
+    int prevX;
+    int prevY;
+    QPainterPath path;
+    QString color;
+};
+
 class Overlay
 {
 public:
@@ -102,6 +119,7 @@ public:
     void addRect(int x, int y, int width, int height, QString color = "#000000", bool filled = false);
     bool addImage(int x, int y, QString filepath, bool useCache = true, int width = -1, int height = -1, int xOffset = 0, int yOffset = 0, qreal hScale = 1, qreal vScale = 1, QList<QRgb> palette = QList<QRgb>(), bool setTransparency = false);
     bool addImage(int x, int y, QImage image);
+    bool addPath(QList<int> x, QList<int> y, QString color);
 private:
     QList<OverlayItem*> items;
     int x;

src/scriptapi/apioverlay.cpp

@@ -212,3 +212,8 @@ void MapView::addMetatileImage(int x, int y, int metatileId, bool setTransparenc
     if (this->getOverlay(layer)->addImage(x, y, image))
         this->scene()->update();
 }
+
+void MapView::addPath(QList<int> x, QList<int> y, QString color, int layer) {
+    if (this->getOverlay(layer)->addPath(x, y, color))
+        this->scene()->update();
+}

src/ui/overlay.cpp

@@ -23,6 +23,17 @@ void OverlayImage::render(QPainter *painter, int x, int y) {
     painter->drawImage(this->x + x, this->y + y, this->image);
 }
 
+void OverlayPath::render(QPainter *painter, int x, int y) {
+    if (x != this->prevX || y != this->prevY) {
+        // Overlay has moved since the path was last drawn
+        path.translate(x - prevX, y - prevY);
+    }
+    this->prevX = x;
+    this->prevY = y;
+    painter->setPen(this->color);
+    painter->drawPath(this->path);
+}
+
 void Overlay::renderItems(QPainter *painter) {
     if (this->hidden) return;
 
@@ -175,3 +186,20 @@ bool Overlay::addImage(int x, int y, QImage image) {
     this->items.append(new OverlayImage(x, y, image));
     return true;
 }
+
+bool Overlay::addPath(QList<int> x, QList<int> y, QString color) {
+    int numPoints = qMin(x.length(), y.length());
+    if (numPoints < 2) {
+        logError("Overlay path must have at least two points.");
+        return false;
+    }
+
+    QPainterPath path;
+    path.moveTo(x.at(0), y.at(0));
+
+    for (int i = 1; i < numPoints; i++)
+        path.lineTo(x.at(i), y.at(i));
+
+    this->items.append(new OverlayPath(path, color));
+    return true;
+}