Undesired CXTEditListBox behavior

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   Hi,

When adding/removing items from a CXTEditListBox you get notifications in the form of LBN_XT_PRENEWITEM/LBN_XT_NEWITEM and LBN_XT_PREDELETEITEM/LBN_XT_DELETEITEM.

Let's say that you want to display a "Yes/No"-messagebox before deleting an item. Then what? There is no way to cancel the action.

Perhaps it would be a good idea to implement "pre"-messages for all actions (move up/down too) and check the return value. If TRUE, then cancel the action, otherwise perform it as usual.

As for a temporary solution, I guess the best would be to override CXTEditListBox::OnDeleteItem() etc?

Thanks!
/Chris

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znakeeye Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 26 July 2006 Status: Offline Points: 1672	Post Options Post Reply Quote znakeeye Report Post Thanks(0) Quote Reply Topic: Undesired CXTEditListBox behavior Posted: 05 June 2007 at 4:05am
	Hi, When adding/removing items from a CXTEditListBox you get notifications in the form of LBN_XT_PRENEWITEM/LBN_XT_NEWITEM and LBN_XT_PREDELETEITEM/LBN_XT_DELETEITEM. Let's say that you want to display a "Yes/No"-messagebox before deleting an item. Then what? There is no way to cancel the action. Perhaps it would be a good idea to implement "pre"-messages for all actions (move up/down too) and check the return value. If TRUE, then cancel the action, otherwise perform it as usual. As for a temporary solution, I guess the best would be to override CXTEditListBox::OnDeleteItem() etc? Thanks! /Chris

Oleg Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Joined: 21 May 2003 Location: United States Status: Offline Points: 11234	Post Options Post Reply Quote Oleg Report Post Thanks(0) Quote Reply Posted: 06 June 2007 at 1:32am
	Problem that now these message implemented as WM_COMMAND - and MFC automatically will return 1 if they was handled. EditListItem is virtual method, you can override it. Thanks.
	Oleg, Support Team CODEJOCK SOFTWARE SOLUTIONS

znakeeye Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 26 July 2006 Status: Offline Points: 1672	Post Options Post Reply Quote znakeeye Report Post Thanks(0) Quote Reply Posted: 11 June 2007 at 6:54am
	Hi, Sorry, but EditListItem() is not virtual. I had to implement these functions to get the desired behavior: OnEndLabelEdit() OnNewItem() OnDeleteItem() OnMoveItemUp() OnMoveItemDown()

znakeeye Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 26 July 2006 Status: Offline Points: 1672	Post Options Post Reply Quote znakeeye Report Post Thanks(0) Quote Reply Posted: 11 June 2007 at 9:04am
	Actually, that didn't work! When pressing <DEL> OnDeleteItem() is called directly, and since it too isn't virtual, my overrided function is not called. CXTEditListBox::PreTranslateMessage() ... OnDeleteItem(); Argh :(