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how to use keyDonw event to implement Copy and Paste ? (Read 2756 times)

heyx Junior Member Offline I Love MindFusion! Posts: 69 Joined: Oct 9^th, 2014	how to use keyDonw event to implement Copy and Paste ? Mar 4^th, 2015 at 7:34am	Print Post
	hi， I use KeyDown like this: Code if ((Keyboard.Modifiers & ModifierKeys.Control) == ModifierKeys.Control && e.Key == Key.C) { CopyItems(); } if ((Keyboard.Modifiers & ModifierKeys.Control) == ModifierKeys.Control && e.Key == Key.V) { PasteItems(); } but, it never execute the CopyItems and PasteItems method? do the Diagram have handled the Ctrl-Key?


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Stoyo God Member Offline MindFusion support Posts: 13230 Joined: Jul 20^th, 2005	Re: how to use keyDonw event to implement Copy and Paste ? Reply #1 - Mar 4^th, 2015 at 8:27am	Print Post
	Hi, WPF executes ApplicationCommands.Copy / Paste for these key combinations, and the diagram handles them by calling its CopyToClipboard and PasteFromClipboard methods. If you want to use your methods instead, you can override the diagram handlers like this: Code diagram.CommandBindings.Add( new CommandBinding(ApplicationCommands.Copy, (sender, args) => CopyItems())); I hope that helps, Stoyan


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heyx Junior Member Offline I Love MindFusion! Posts: 69 Joined: Oct 9^th, 2014	Re: how to use keyDonw event to implement Copy and Paste ? Reply #2 - Mar 4^th, 2015 at 9:02am	Print Post
	hi Stoyan, my CopyItems and PasteItems has no parameter, so I can't use your code.

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Stoyo God Member Offline MindFusion support Posts: 13230 Joined: Jul 20^th, 2005	Re: how to use keyDonw event to implement Copy and Paste ? Reply #3 - Mar 4^th, 2015 at 10:35am	Print Post
	My code also calls CopyItems() without arguments if you look above, I don't know why you have added ones. The (sender,args) parameters are for the lambda expression set as handler of Copy command and you can ignore them, you don't have to pass them to CopyItems. If you have a 'sender' argument passed to outer method from where you call Bindings.Add, you'll only have to rename the inner one, e.g. call it just 's'.


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heyx Junior Member Offline I Love MindFusion! Posts: 69 Joined: Oct 9^th, 2014	Re: how to use keyDonw event to implement Copy and Paste ? Reply #4 - Mar 5^th, 2015 at 1:51am	Print Post
	hi Stoyan, I have fixed my errors using below code. But when I move some of nodes on Diagram.It trigger CustomerCopyItems method everytime. is there some properties of Diagram which I have not setted its value? thanks. Code void CustomerCopyItems(object sender, ExecutedRoutedEventArgs e) { CopyItems(); } void CustomerPasteItems(object sender, ExecutedRoutedEventArgs e) { PasteItems(); }


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Stoyo God Member Offline MindFusion support Posts: 13230 Joined: Jul 20^th, 2005	Re: how to use keyDonw event to implement Copy and Paste ? Reply #5 - Mar 5^th, 2015 at 9:06am	Print Post
	Hi, The diagram won't call your methods on its own. Check if you aren't calling them from some event handlers, such us OnMouseButtonUp or OnNodeModified. E.g. add breakpoints on the CopyItems() and PasteItems() lines, and see what other methods are shown in the call-stack window when the breakpoints hit. I hope that helps, Stoyan


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