ToolTipContxt for items in CTreeCtrl

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   I'm trying to display Office2007-styled tooltips for all items in my CXTTreeCtrl-derived class. This seems tricky! I found this piece of information, but I still can't get it to work: http://forum.codejock.com/forum_posts.asp?TID=8578&KW=tree+tooltip

Any ideas on how to accomplish this?

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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: ToolTipContxt for items in CTreeCtrl Posted: 18 December 2007 at 7:21am
	I'm trying to display Office2007-styled tooltips for all items in my CXTTreeCtrl-derived class. This seems tricky! I found this piece of information, but I still can't get it to work: http://forum.codejock.com/forum_posts.asp?TID=8578&KW=tree+tooltip Any ideas on how to accomplish this?

rdhd Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 13 August 2007 Location: United States Status: Offline Points: 867	Post Options Post Reply Quote rdhd Report Post Thanks(0) Quote Reply Posted: 19 December 2007 at 2:29pm
	Unfortunately CJ does not provide a tooltip control that is subclassed from the MFC tooltip control. Otherwise one could just call SetToolTips and pass in the pointer to a subclassed control. So its a bit harder to do but can be done. First call CTreeCtrl's SetToolTips(NULL) - that turns off the MFC tooltips in the CTreeCtrl (which if I remember correct codejock does subclass CXTTreeCtrl from). Then you have to relay mouse messages to the context using the CJ context's FilterToolTipMessage method (if you relay the mouse event from a handler you have to convert from client to screen). That goes something like this (I subclassed CTreeCtrl to get the mouse messages and implemented a "RelayEvent" method where I pass in e.g., WM_MOUSEMOVE as the first arg): void MyListCtrl::RelayEvent(UINT message, WPARAM wParam, LPARAM lParam) { MSG msg; msg.hwnd= m_hWnd; msg.message= message; msg.wParam= wParam; msg.lParam= lParam; POINT pt; pt.x = LOWORD (lParam); pt.y = HIWORD (lParam); ClientToScreen(&pt); msg.time= clock(); msg.pt.x= pt.x; msg.pt.y= pt.y; m_ToolTipContext.FilterToolTipMessage(this, &msg); } Then you also need to implement OnToolHitTest and OnToolTipText (depending on how you want to supply the text - it can be supplied in the OnToolHitTest routine). Make sure the ID you provide in OnToolHitTest changes with each cell or CJ won't ask for the text. I do something like this in OnToolHitTest: pTI->rect = rectCell; pTI->hwnd = m_hWnd; pTI->uId = (UINT)(( nItem << 10 ) + (hi.iSubItem & 0x3ff) + 1 ); pTI->lpszText = LPSTR_TEXTCALLBACK;

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: 02 January 2008 at 4:06am
	Thanks for your response. Though, I can't get it working here. OnToolHitTest and OnToolTipText are never called Here is my WM_MOUSEMOVE trap: BOOL CMyTreeCtrl::OnWndMsg(UINT message, WPARAM wParam, LPARAM lParam, LRESULT *pResult) { if (message == WM_MOUSEMOVE) RelayEvent(message, wParam, lParam); ... }

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: 03 January 2008 at 4:58am
	For God's sake! Solved it... I had removed "const" from the OnToolHitTest declaration, due to a call to the non-const function CancelToolTips()... I had a feeling long ago, but I ignored it until now. Thanks for your code. I believe I can use it here.