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Questions about the diagramming package for Xamarin (Read 11423 times)

dpru2 YaBB Newbies Offline I Love MindFusion! Posts: 19 Joined: Feb 2^nd, 2021	Re: Questions about the diagramming package for Xamarin Reply #15 - Feb 12^th, 2021 at 1:39pm	Print Post
	Thank you for the quick turnaround on that. With regard to the links, an interesting behavior I have found is that when the following 2 expressions are in this order, I correctly get a link with 3 segments that is drawn well: Code (C++) link1.SegmentCount = 3; link1.Shape = LinkShape.Cascading; However, if I just change the order of the statements to this: Code (C++) link1.Shape = LinkShape.Cascading; link1.SegmentCount = 3; Then I suddenly get the "initially-unattached" problem. It seems as though setting these properties results in some methods being called in the background that are doing some heavy lifting, and the order in which those methods are called apparently matters to how the links are drawn.


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dpru2 YaBB Newbies Offline I Love MindFusion! Posts: 19 Joined: Feb 2^nd, 2021	Re: Questions about the diagramming package for Xamarin Reply #16 - Feb 12^th, 2021 at 1:44pm	Print Post
	On another note: I've started using the build that you uploaded and linked to in your previous post. It seems like the "NodeModifying" event is raised when I resize a node, but not when I move a node. In fact, I have attempted to subscribe to multiple events: Code node1.PropertyChanged += Node1_PropertyChanged; diagram.NodeModifying += Diagram_NodeModifying; diagram.NodeModified += Diagram_NodeModified; diagram.LinkModifying += Diagram_LinkModifying; diagram.SelectionModifying += Diagram_SelectionModifying; I've put breakpoints at the beginning of each of the event handlers, and it seems as if none of the above events gets raised when a node is moved. Resizing a node will call the NodeModifying event and then when the resize is finished it calls the NodeModified event.


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Slavcho YaBB Moderator Online tech.support Posts: 3435 Joined: Oct 19^th, 2005	Re: Questions about the diagramming package for Xamarin Reply #17 - Feb 12^th, 2021 at 2:18pm	Print Post
	Have you enabled the AdjustmentHandles.Move bit in EnabledHandles as shown couple of posts above? PanAndModify incorrectly lets you move without it, but then leads to some confusion with events. We'll fix that for upcoming release and you won't be able to move nodes without it then. Regards, Slavcho


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dpru2 YaBB Newbies Offline I Love MindFusion! Posts: 19 Joined: Feb 2^nd, 2021	Re: Questions about the diagramming package for Xamarin Reply #18 - Feb 12^th, 2021 at 2:41pm	Print Post
	Ah, I apologize. When I enabled the handles like you said, it correctly fired the event handler. With that now working, it is also correctly "re-routing" the link as I move the nodes.


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Slavcho YaBB Moderator Online tech.support Posts: 3435 Joined: Oct 19^th, 2005	Re: Questions about the diagramming package for Xamarin Reply #19 - Feb 17^th, 2021 at 2:38pm	Print Post
	Quote: However, if I just change the order of the statements to this ...Then I suddenly get the "initially-unattached" problem. Cascading links with just one segment aren't valid and you'd get one of the end points unaligned, with later SegmentCount setter not realigning it. In this build Shape setter resets SegmentCount internally if it's 1 (as we already do in other platforms) so order shouldn't matter anymore - https://mindfusion.eu/_temp/XamarinDiagram.zip It also implements a WhileCreating flag for RoutingOptions.TriggerRerouting. With that and RouteLinks enabled, you shouldn't have to re-route links explicitly from event handlers. Regards, Slavcho


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