Make map tile cursor more responsive according to metatile selection

include/ui/cursortilerect.h

@@ -0,0 +1,77 @@
+#ifndef CURSORTILERECT_H
+#define CURSORTILERECT_H
+
+#include <QGraphicsItem>
+#include <QPainter>
+#include <QRgb>
+
+class CursorTileRect : public QGraphicsItem
+{
+public:
+    CursorTileRect(bool *enabled, QRgb color);
+    QRectF boundingRect() const override
+    {
+        int width = this->width;
+        int height = this->height;
+        if (this->singleTileMode) {
+            width = 16;
+            height = 16;
+        } else if (!this->rightClickSelectionAnchored && this->smartPathMode && this->selectionHeight == 3 && this->selectionWidth == 3) {
+            width = 32;
+            height = 32;
+        }
+        qreal penWidth = 4;
+        return QRectF(-penWidth,
+                      -penWidth,
+                      width + penWidth * 2,
+                      height + penWidth * 2);
+    }
+
+    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
+               QWidget *widget) override
+    {
+        int width = this->width;
+        int height = this->height;
+        if (this->singleTileMode) {
+            width = 16;
+            height = 16;
+        } else if (this->smartPathInEffect()) {
+            width = 32;
+            height = 32;
+        }
+
+        painter->setPen(this->color);
+        painter->drawRect(-1, -1, width + 2, height + 2);
+        painter->setPen(QColor(0, 0, 0));
+        painter->drawRect(-2, -2, width + 4, height + 4);
+        painter->drawRect(0, 0, width, height);
+    }
+    void initAnchor(int coordX, int coordY);
+    void stopAnchor();
+    void initRightClickSelectionAnchor(int coordX, int coordY);
+    void stopRightClickSelectionAnchor();
+    void setSmartPathMode();
+    bool getSmartPathMode() { return this->smartPathMode; }
+    void setSingleTileMode();
+    void stopSingleTileMode();
+    void setNormalPathMode();
+    void updateLocation(int x, int y);
+    void updateSelectionSize(int width, int height);
+    bool *enabled;
+private:
+    int width;
+    int height;
+    bool anchored;
+    bool rightClickSelectionAnchored;
+    bool smartPathMode;
+    bool singleTileMode;
+    int anchorCoordX;
+    int anchorCoordY;
+    int selectionWidth;
+    int selectionHeight;
+    QRgb color;
+    bool smartPathInEffect();
+};
+
+
+#endif // CURSORTILERECT_H

include/ui/mappixmapitem.h

@@ -43,6 +43,8 @@ private:
     static QList<int> smartPathTable;
 
 signals:
+    void startPaint(QGraphicsSceneMouseEvent *, MapPixmapItem *);
+    void endPaint(QGraphicsSceneMouseEvent *, MapPixmapItem *);
     void mouseEvent(QGraphicsSceneMouseEvent *, MapPixmapItem *);
     void hoveredMapMetatileChanged(int x, int y);
     void hoveredMapMetatileCleared();