cancel drawing when the mouse moves in / out of the zoom window, fixes #228

src/gui/game/GameController.cpp

@@ -379,6 +379,20 @@ void GameController::AdjustZoomSize(int direction, bool logarithmic)
 	gameModel->SetZoomFactor(newZoomFactor);
 }
 
+bool GameController::MouseInZoom(ui::Point position)
+{
+	if(position.X >= XRES)
+		position.X = XRES-1;
+	if(position.Y >= YRES)
+		position.Y = YRES-1;
+	if(position.Y < 0)
+		position.Y = 0;
+	if(position.X < 0)
+		position.X = 0;
+
+	return gameModel->MouseInZoom(position);
+}
+
 ui::Point GameController::PointTranslate(ui::Point point)
 {
 	if(point.X >= XRES)

src/gui/game/GameController.h

@@ -141,6 +141,7 @@ public:
 	void FrameStep();
 	void TranslateSave(ui::Point point);
 	void TransformSave(matrix2d transform);
+	bool MouseInZoom(ui::Point position);
 	ui::Point PointTranslate(ui::Point point);
 	ui::Point NormaliseBlockCoord(ui::Point point);
 	std::string ElementResolve(int type, int ctype);

src/gui/game/GameModel.cpp

@@ -691,6 +691,20 @@ ui::Point GameModel::GetZoomPosition()
 	return ren->zoomScopePosition;
 }
 
+bool GameModel::MouseInZoom(ui::Point position)
+{
+	if (!GetZoomEnabled())
+		return false;
+
+	int zoomFactor = GetZoomFactor();
+	ui::Point zoomWindowPosition = GetZoomWindowPosition();
+	ui::Point zoomWindowSize = ui::Point(GetZoomSize()*zoomFactor, GetZoomSize()*zoomFactor);
+
+	if (position.X >= zoomWindowPosition.X && position.X >= zoomWindowPosition.Y && position.X <= zoomWindowPosition.X+zoomWindowSize.X && position.Y <= zoomWindowPosition.Y+zoomWindowSize.Y)
+		return true;
+	return false;
+}
+
 ui::Point GameModel::AdjustZoomCoords(ui::Point position)
 {
 	if (!GetZoomEnabled())

src/gui/game/GameModel.h

@@ -181,6 +181,7 @@ public:
 	int GetZoomFactor();
 	void SetZoomPosition(ui::Point position);
 	ui::Point GetZoomPosition();
+	bool MouseInZoom(ui::Point position);
 	ui::Point AdjustZoomCoords(ui::Point position);
 	void SetZoomWindowPosition(ui::Point position);
 	ui::Point GetZoomWindowPosition();

src/gui/game/GameView.cpp

@@ -158,6 +158,7 @@ GameView::GameView():
 	toolIndex(0),
 	zoomEnabled(false),
 	zoomCursorFixed(false),
+	mouseInZoom(false),
 	drawPoint1(0, 0),
 	drawPoint2(0, 0),
 	drawMode(DrawPoints),
@@ -1040,6 +1041,7 @@ void GameView::setToolButtonOffset(int offset)
 
 void GameView::OnMouseMove(int x, int y, int dx, int dy)
 {
+	bool newMouseInZoom = c->MouseInZoom(ui::Point(x, y));
 	mousePosition = c->PointTranslate(ui::Point(x, y));
 	currentMouse = ui::Point(x, y);
 	if (selectMode != SelectNone)
@@ -1048,13 +1050,21 @@ void GameView::OnMouseMove(int x, int y, int dx, int dy)
 			selectPoint1 = c->PointTranslate(ui::Point(x, y));
 		if (selectPoint1.X != -1)
 			selectPoint2 = c->PointTranslate(ui::Point(x, y));
-		return;
 	}
-	if (isMouseDown && drawMode == DrawPoints)
+	else if (isMouseDown)
 	{
-		pointQueue.push(ui::Point(c->PointTranslate(ui::Point(x-dx, y-dy))));
-		pointQueue.push(ui::Point(c->PointTranslate(ui::Point(x, y))));
+		if (newMouseInZoom == mouseInZoom)
+		{
+			if (drawMode == DrawPoints)
+			{
+				pointQueue.push(ui::Point(c->PointTranslate(ui::Point(x-dx, y-dy))));
+				pointQueue.push(ui::Point(c->PointTranslate(ui::Point(x, y))));
+			}
+		}
+		else if (drawMode == DrawPoints || drawMode == DrawFill)
+			isMouseDown = false;
 	}
+	mouseInZoom = newMouseInZoom;
 }
 
 void GameView::OnMouseDown(int x, int y, unsigned button)

src/gui/game/GameView.h

@@ -43,6 +43,7 @@ private:
 	bool isMouseDown;
 	bool zoomEnabled;
 	bool zoomCursorFixed;
+	bool mouseInZoom;
 	bool drawSnap;
 	bool shiftBehaviour;
 	bool ctrlBehaviour;