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Panning the diagram vs. creating a new node (Read 4449 times)

Rennie Full Member Offline I Love MindFusion! Posts: 108 Location: Copenhagen, Denmark Joined: Jul 17^th, 2012	Panning the diagram vs. creating a new node Oct 27^th, 2013 at 1:31am	Print Post
	I'm just starting to test the beta version of this module. Looks good. Maybe I'm missing something obvious, but how do you pan a diagram that is larger than the display? The usual pan or swipe gesture with the finger results in a new node being created.


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Stoyo God Member Offline MindFusion support Posts: 13230 Joined: Jul 20^th, 2005	Re: Panning the diagram vs. creating a new node Reply #1 - Oct 27^th, 2013 at 7:01am	Print Post
	With two fingers, or set DiagramView.Behavior = Pan to enable single-finger panning. I hope that helps, Stoyan


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Rennie Full Member Offline I Love MindFusion! Posts: 108 Location: Copenhagen, Denmark Joined: Jul 17^th, 2012	Re: Panning the diagram vs. creating a new node Reply #2 - Oct 29^th, 2013 at 2:53am	Print Post
	Thanks. Edit: Um, that should actually be DiagramView.setBehavior(Behavior.Pan); right?
	« Last Edit: Oct 30^th, 2013 at 1:16am by Rennie »

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Rennie Full Member Offline I Love MindFusion! Posts: 108 Location: Copenhagen, Denmark Joined: Jul 17^th, 2012	Re: Panning the diagram vs. creating a new node Reply #3 - Nov 6^th, 2013 at 2:16pm	Print Post
	My simple little app based on the beta version of your Android product is almost done. As I said before, I think it is great that MindFusion has created a diagramming product that is multi-platform in a very compatible way. But I have one comment about this Behavior=Pan thing. I don't think it should be a "behavior", because that means that you can't specify one of the other behaviors. For example, I'd like to specify Behavior=SelectOnly, and for another app I might want to use one of the other behaviors. So I think the one-finger panning should be a separate option, and not considered a behavior.


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Stoyo God Member Offline MindFusion support Posts: 13230 Joined: Jul 20^th, 2005	Re: Panning the diagram vs. creating a new node Reply #4 - Nov 7^th, 2013 at 9:43am	Print Post
	We can't see how to implement it as a simple bit-wise combination, there will be too many ambiguities. If you want to combine another type of behavior with single finger panning, you could derive from that behavior class (LinkShapesBehavior let's say), and start panning when you find it appropriate (e.g. there are no nodes at touch location). All the PanBehavior class does is the following, it shouldn't be hard to integrate into a custom class: Code protected void pointerDown(Point pointerPosition, MotionEvent e) { panPoint = new PointF(getDiagramView().getDocScrollX(), getDiagramView().getDocScrollY()); ptStartDragDev = pointerPosition; } protected void pointerMove(Point pointerPosition, MotionEvent e) { Rect visibleRect = getDiagramView().getVisibleRect(); RectF rcPage = getDiagramView().canvasToDoc(visibleRect); float sx = panPoint.x - getDiagramView().componentToDocLength(pointerPosition.x - ptStartDragDev.x); float sy = panPoint.y - getDiagramView().componentToDocLength(pointerPosition.y - ptStartDragDev.y); getDiagramView().scrollStayInDoc(sx, sy, rcPage); } private PointF panPoint; private Point ptStartDragDev; Placing index and middle fingers close together and panning with both shouldn't be that hard for your users anyways. I hope that helps, Stoyan


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