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Normal Topic ArrowCreating called too late (Read 1884 times)
ooswald
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ArrowCreating called too late
Jun 20th, 2006 at 12:00pm
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ArrowCreating is fired only AFTER the mouse button has been released (in contradiction to ArrowAttaching which fires each time an arrow endpoint is dragged close to an anchor point).

I need to give visual feedback to the user whether an arrow between two anchor points can be created or not. This works fine when an existing arrow is modified.

However, when an arrow is created, only ValidateAnchorPoint gets called while the endpoint is dragged to the destination node's anchor point. The problem is, that none of the AttachConfirmArgs properties contains a reference to the arrow's base node.

While the user is creating an arrow from one node to another, how can I know from which node he is creating the arrow?
  
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Stoyo
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Re: ArrowCreating called too late
Reply #1 - Jun 20th, 2006 at 12:52pm
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ArrowCreating works as designed & documented; we can make it raised for every MouseMoved event in the next version. The ValidateAnchorPoint event arguments include an Origin property that should return the base node.
  
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ooswald
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Re: ArrowCreating called too late
Reply #2 - Jun 20th, 2006 at 12:55pm
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unfortunately the Origin property is null when an arrow is created  Embarrassed
  
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Stoyo
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Re: ArrowCreating called too late
Reply #3 - Jun 20th, 2006 at 1:53pm
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Ok, you cannot use ValidateAnchor for that before the arrow is created because the Origin and Destination are not set yet. We can update the event so its arguments specify the would-be origin and destination. We can do that in the following couple of days - let me know what .NET version do you use if you wish to receive our daily FC.NET builds when that's implemented.
  
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