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How to limit the movement of shapes [message #1775204]

Thu, 26 October 2017 05:06

Eclipse User

I hope the shapes can only move up or down. That is, the shapes can't move left or right. What should I do?

Re: How to limit the movement of shapes [message #1775273 is a reply to message #1775204]

Fri, 27 October 2017 02:34

Eclipse User

Sorry, but I cannot really help based on that scarce information. Shapes can move in all directions, but you may restrict their movement options by providing your own move feature.

Michael

Re: How to limit the movement of shapes [message #1775292 is a reply to message #1775273]

Fri, 27 October 2017 05:41

Eclipse User

When I move the shape, there is a float shape. When I release the mouse, the real shape will move to the location. I hope the shape and float shape only move up or down. That is to say, only the Y coordinates of the shape can be changed. But the moveShape method of DefaultMoveShapeFeature is invoked after releasing the mouse.
I write the code in the moveShape method:
int x=context.getX();
int deltax=context.getDeltaX();
((MoveShapeContext)context).setX(x-deltax);
((MoveShapeContext)context).setDeltaX(0);
super.moveShape(context);

So, the shape is limited. But how to limit the float shape?

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[Updated on: Fri, 27 October 2017 05:57] by Moderator

Re: How to limit the movement of shapes [message #1775302 is a reply to message #1775292]

Fri, 27 October 2017 07:53

Eclipse User

The position of the float shape will simply follow the mouse pointer, there is no way to influence that. What you could do is override canMoveShape and return false in case the user tries to drag the shape to an invalid place; you could for example allow a corridor of +/- 10 pixels wher you allow the drop. Or you simply change the x coordinate back to the original value in moveShape.

HTH,
Michael

Re: How to limit the movement of shapes [message #1775316 is a reply to message #1775302]

Fri, 27 October 2017 10:23

Eclipse User

Thanks Michael

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