Assertion failure While Editing CTreeView Label.

shanmugarajaa

Dear Friend, After adding all necessary message handler to support to edit label in CTreeView

void CMyTreeView::OnBeginLabelEdit( NMHDR* /*pNMHDR*/, LRESULT* pResult)
{
// This is the Limit the size of the Tag Name to 127
CTreeCtrl &ctlFiles = GetTreeCtrl();
ctlFiles.GetEditControl()->LimitText( 127 );
*pResult = 0;
}

void CMyTreeView::OnEndLabelEdit( NMHDR * pNMHDR, LRESULT * pResult )
{
*pResult = TRUE;
}

BOOL CMyTreeView::PreTranslateMessage(MSG* pMsg)
{

if ( pMsg->message == WM\_KEYDOWN )
{
	CTreeCtrl &ctlFiles = GetTreeCtrl();
	CEdit\* edit = ctlFiles.GetEditControl();
	if (edit)
	{
		if( GetKeyState( VK\_CONTROL ) && pMsg->wParam == VK\_C )
		{
			edit->Copy();
			return TRUE;
		}
		if( GetKeyState( VK\_CONTROL ) && pMsg->wParam == VK\_V )
		{
			edit->Paste();
			return TRUE;
		}
		if( GetKeyState( VK\_CONTROL ) && pMsg->wParam == VK\_X )
		{
			edit->Cut();
			return TRUE;
		}
		if( GetKeyState( VK\_CONTROL ) && pMsg->wParam == VK\_Z )
		{
			edit->Undo();
			return TRUE;
		}
		if( pMsg->wParam == VK\_RETURN || pMsg->wParam == VK\_ESCAPE || pMsg->wParam == VK\_CONTROL || pMsg->wParam == VK\_INSERT )
		{
			edit->SendMessage(WM\_KEYDOWN, pMsg->wParam, pMsg->lParam);
			return TRUE;
		}
	}
}
return CTreeView::PreTranslateMessage(pMsg);

}

If I press a character 'a' to 'z' and 'A' to 'z' then MFC throwing Assertion. I don't know what I am missing out to avoid this issue. Kindly help me on this. Thanks, S Shanmuga Raja

jeron1

Which line does it occur on when you step through it, and what is the assertion being hit?

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David Crow

shanmugarajaa wrote:

...MFC throwing Assertion.

Exactly what assertion is being thrown?

shanmugarajaa wrote:

Kindly help me on this.

Have you stepped through the code using the debugger?

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_Flaviu

You should avoid overriding PreTranslateMessage ... in your case, you can solve more elegant your task overriding WM_CUT[^], WM_COPY[^], and WM_PASTE[^].