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I derived from UndoEngine and implemented a AddUndoUnit Method that pushes a UndoUnit onto a stack.
My IServiceProvider is a DesignSurface with an CodeDomSerializationService (Serilazation seems to work and my stack gets bigger for any change I make on my UI).
I expected the UndoUnit.Undo() Method to desirialize the latest SerializationStore that gets popped of the stack, but it doesnt seem to work.
How is the UndoEngine meant to be implemented ?
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| weichsel Tuesday, September 06, 2005 1:46 PM |
I think you need to pass the IDesignerHost as the service provider, not DesignSurface. This is because the UndoUnits query service for the IDesignerHost.
Raghavendra
http://blogs.msdn.com/rprabhu |
| Raghavendra Prabhu MSFT Thursday, September 08, 2005 7:21 PM |
Thanks for your Reply!
I am now passing IDesignerHost and the Undo seems to do anything atleast. If I add an Control to the surface and try to Undo() it, the control remains but the selection gets set to the control that got added before. That tells me that the SelectionService got notified that an undo has taken place but the rest stays the same :(.
Any ideas?
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| weichsel Monday, September 12, 2005 7:39 AM |
I am currently working on the Undo() problem again.
I have the following problems:
If i try to undo the creation of a Control, the host throws an "DesignerHostCantDestroyInheritedComponent" Exception.
If i try to undo a change ("resize","move",...) the UndoEngine reports a stack overflow. (Without any details)
I am using Visual C# Express August CTP.
Can someone help me?
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| weichsel Friday, October 07, 2005 9:50 AM |
Seems that UndoEngine is a way to collect changes into form design and not a service implementation (so is the name). What is not documented is that even if you try to use it seems that it can’t do the job without the presence of certain services. I identified those services:
· INameCreationService
· MenuCommandService
· ComponentSerializationService
· IDesignerSerializationService
· UndoEngine
The UndoEngine can be seen in action for a short period of time in example at: http://www.geocities.com/balcanuc/TestUndoEngine.zip
If someone can host it to a alternative permanent location please do.
Also I would like to hear some feedback if I did something wrong in the sample.
On the other side I think weichsel owns me a beer. ;) |
| balcanuc Saturday, December 24, 2005 12:23 AM |
Hi
This is a really cool app.
Just one question how do I implement a DragEnter event onto the designform
Thanks |
| Kevin Dherman Monday, January 16, 2006 9:28 AM |
Why you need to handle DragEnter onto designform? You want to implement a Toolbox like drag drop of some components?
For this kind of thing you should implement IToolboxService and a GUI component to handle drag-drop. What you should put as DataObject for drag-drop operation is a ToolboxItem.
If so, there are some examples already available on the web. (examples I know are for .NET 1.1) |
| balcanuc Monday, January 16, 2006 7:28 PM |
Yes, I am attempting somthing similer.
I build up a treeview from an XSD document, Each tree node is a form item.
When you drag the tree node onto the form depending on the treenode a textbox or a checkbox etc...is added to the form.
Something similar to what InfoPath does.
Do think think I should still try implement IToolboxService.or should I get a DragEnter event on the design form.
Thanks in advance
Kevin Dherman |
| Kevin Dherman Tuesday, January 17, 2006 4:56 AM |
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| balcanuc Tuesday, January 17, 2006 6:45 PM |
Somebody knows how implement the StandardCommands.Undo command?. Using with transactions and not works....
Regards |
| Tabas Wednesday, January 18, 2006 12:00 AM |
Did you figure this out, Tabas? I'm working on this topic now too.
Alan |
| LearnToRock Saturday, February 18, 2006 4:23 PM |
Tabas, did you find the solution. I'm eager to know...
Alan
| Tabas wrote: | |
Somebody knows how implement the StandardCommands.Undo command?. Using with transactions and not works....
Regards |
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| LearnToRock Monday, February 27, 2006 2:09 AM |
@balcanuc
well mate I guess i also owe u a beer at least 
thx very much i didn't really know where to start with the undo/redo functionallity ...
great example.
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| Vladimir.Ilic Thursday, November 27, 2008 4:32 PM |
What example are you referring to? I've been struggling with solving the UndoEngine riddle for days.
Thanks in advance
Brian |
| Brian Butler Tuesday, December 16, 2008 3:13 AM |
Hi Brian, sorryI didn't respond earlier, must've missed the notification,and Iguessyou probably solved it by now... But anyway, if someone else is wondering, I was talking about the example provided by balcanuc earlier in this post... I used the UndoEngineImplementation in my custom form designer hosting application. I added the service to DesignSurface (or rather to a class that inheritsfrom DesignSurface to add some functionallity), andhad all of the bellow mentionedservices already implemented and added to the same service container. And it worked.
Seems that UndoEngine is a way to collect changes into form design and not a service implementation (so is the name). What is not documented is that even if you try to use it seems that it can’t do the job without the presence of certain services. I identified those services:
· INameCreationService
· MenuCommandService
· ComponentSerializationService
· IDesignerSerializationService
· UndoEngine
The UndoEngine can be seen in action for a short period of time in example at: http://www.geocities.com/balcanuc/TestUndoEngine.zip
If someone can host it to a alternative permanent location please do.
Also I would like to hear some feedback if I did something wrong in the sample.
On the other side I think weichsel owns me a beer. ;)
- Edited byVladimir.Ilic Thursday, June 04, 2009 12:20 PM
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| Vladimir.Ilic Thursday, June 04, 2009 12:18 PM |
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