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FreizeitDuscher
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UndoManager
Sep 28th, 2010 at 11:51am
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Hi,
i'am searching for a possibility to write the actual state
of the whole diagram to the UndoManager.

i've write a "sort" function, that moves many shapes.
it seems like the startComposite function does not track all steps.

is there an other function?

thanks!
olli
  
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Stoyo
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Re: UndoManager
Reply #1 - Sep 28th, 2010 at 4:45pm
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Hi,

Only a few operations are saved automatically for undo, such as adding or removing items, and changing items positions interactively. If you need to save a batch of item positions changes done from code, this should work:

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CompositeCmd composite = new CompositeCmd(diagram, "Sort shapes");
for (DiagramItem item: diagram.getItems())
	composite.addSubCmd(new ModifyItemCmd(item));
composite.execute();


If some other property changes must be saved too, use ChangeItemCmd instead of ModifyItemCmd.

I hope that helps,
Stoyan
  
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FreizeitDuscher
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Re: UndoManager
Reply #2 - Dec 11th, 2010 at 2:30pm
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hi =)

that seems to work!

i've got two other questions now.

first, is there an option to disable the automatic captured undo records but have the possibillity to write in die history those "snapshots"^^.

second, in this sort algorithm i move a few shapes, if i move them while iam sorting, so that the user see a preview of the diagram after sorting, the diagram seems not do repaint correctly. only if the moving shapes contains other shapes that are linked, then it works very fine .. you've got n idea?

thank you! =)
olli
  
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Stoyo
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Re: UndoManager
Reply #3 - Dec 13th, 2010 at 8:55am
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Hi,

1. You could implement Diagram.Listener.actionRecording and filter out all commands except the composite ones.

2. Try calling diagram.repaint() after all moving and sorting is done.

I hope that helps,
Stoyan
  
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FreizeitDuscher
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Re: UndoManager
Reply #4 - Dec 13th, 2010 at 2:30pm
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hi Stoyo,

1. thank you, that should work for me.
2. i've allready tried this, that doesnt work, it looks like there is a differnce between moving shapes, and moving shapes that are linked?

thank you,
olli
  
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Stoyo
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Re: UndoManager
Reply #5 - Dec 13th, 2010 at 4:07pm
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Hi, Are you setting nodes positions while other nodes are being modified - e.g. from the nodeModifying handler?
  
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FreizeitDuscher
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Re: UndoManager
Reply #6 - Dec 13th, 2010 at 4:10pm
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yes, the function is called from the nodeModifying handler.
  
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Stoyo
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Re: UndoManager
Reply #7 - Dec 13th, 2010 at 7:05pm
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Try also calling DiagramView.recreateCacheImage().

I hope that helps,
Stoyan
  
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FreizeitDuscher
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Re: UndoManager
Reply #8 - Dec 13th, 2010 at 8:02pm
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thats it, thank you! Smiley
  
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