Restrict Boundary for QGraphicsPolygonItem

[sean.reynolds]

Hey guys,

I havea a QGraphicsPolygonItem (Just a simple rectangle) that I can drag around in my QGraphicsScene.

I can select the shape and drag it around. However if it is dragged too far to the edge of the window, it gets clipped and goes off screen.

Have a look at the API but couldn't find how I can restrict the area the polygon can move around.

Any ideas?

Thanks

Sean

[sean.reynolds]

Found the solution to the problem.

public void mouseMoveEvent(QGraphicsSceneMouseEvent event)
	{
		super.mouseMoveEvent(event);
 
		if (movingBlock != null)
		{
			if(movingBlock.pos().x() <= 0.0)
			{
				movingBlock.setPos(0.0, movingBlock.y());
			}
 
			if(movingBlock.pos().x() >= this.sceneRect().width())
			{
				movingBlock.setPos(this.sceneRect().width(), movingBlock.y());
			}
 
			if(movingBlock.pos().y() <= 0)
			{
				movingBlock.setPos(movingBlock.x(), 0.0);
			}
 
			if(movingBlock.pos().y() >= this.sceneRect().height())
			{
				movingBlock.setPos(movingBlock.x(), this.sceneRect().height());
			}
		}		
	}

public void mouseMoveEvent(QGraphicsSceneMouseEvent event)
	{
		super.mouseMoveEvent(event);

		if (movingBlock != null)
		{
			if(movingBlock.pos().x() <= 0.0)
			{
				movingBlock.setPos(0.0, movingBlock.y());
			}
			
			if(movingBlock.pos().x() >= this.sceneRect().width())
			{
				movingBlock.setPos(this.sceneRect().width(), movingBlock.y());
			}
			
			if(movingBlock.pos().y() <= 0)
			{
				movingBlock.setPos(movingBlock.x(), 0.0);
			}
		
			if(movingBlock.pos().y() >= this.sceneRect().height())
			{
				movingBlock.setPos(movingBlock.x(), this.sceneRect().height());
			}
		}		
	}

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