The MindFusion Forums - Arrows fire too many SelectionChange events

(UTC)

The MindFusion Forums › Flow Diagramming Components › Windows Forms › Arrows fire too many SelectionChange events

(Moderator: Slavcho)

‹ Previous Topic | Next Topic ›

Pages: 1

Arrows fire too many SelectionChange events (Read 2033 times)

jabesc YaBB Newbies Offline I love YaBB 1G - SP1! Posts: 2 Joined: Sep 22^nd, 2006	Arrows fire too many SelectionChange events Sep 22^nd, 2006 at 1:59pm	Print Post
	I use the FLowchart.NET control to display relatively large graphs of data. When I select a node(s) I draw all relationships to other nodes with arrows. The relationships can be quite complex so I have many arrows showing with with the nodes (Flowchart.Box). The performance is excellent in all cases except when I do a multiple selection of nodes when there are already numerous arrows showing from a previous selection, each arrow in the new selection seems to fire the SelectionChange event 1 or more times. Case in point: I have a node with one arrow leaving the node, I select the node with the arrow also in the selection rectangle and then I get 5 SelectionChange events (only need 1). My question (finally) is, is there a way I can "unhook" the SelectionChange event from the arrows, so that only the boxes fire that event? Or is there some other way to deal with this issue?


	IP Logged

Stoyo God Member Offline MindFusion support Posts: 13230 Joined: Jul 20^th, 2005	Re: Arrows fire too many SelectionChange events Reply #1 - Sep 22^nd, 2006 at 2:09pm	Print Post
	Hi, If you don't need to let your users modify the arrows, you can set Locked = true for all arrows; that should prevent their selection. If the SelectAfterCreate property is enabled, set it to false before creating arrows - otherwise the selection will change after you call CreateArrow, and that will probably raise SelectionChanged again. I hope that helps, Stoyan


	IP Logged

jabesc YaBB Newbies Offline I love YaBB 1G - SP1! Posts: 2 Joined: Sep 22^nd, 2006	Re: Arrows fire too many SelectionChange events Reply #2 - Sep 25^th, 2006 at 11:32am	Print Post
	Hi Stoyan, That worked great. Multi selections now occur within a few seconds... Thanks for your prompt response... JAB


	IP Logged

Stoyo God Member Offline MindFusion support Posts: 13230 Joined: Jul 20^th, 2005	Re: Arrows fire too many SelectionChange events Reply #3 - Sep 25^th, 2006 at 12:37pm	Print Post
	Hi there, If the application creates many arrows while processing the selection, try how that will work with ValidityChecks = false; this too might improve the performance a bit. Stoyan


	IP Logged

Pages: 1

‹ Previous Topic | Next Topic ›