Cast in OnGridNotify() method

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   Hi all,

I encountered the following problem: I created my custom control derived from CXTPPropertyGridItemEnum-class. I use it in grid (use the toolkit ver. 10.3.1). In OnGridNotify() method I need to spy for some events. In appropriate event I have to perform a cast from 'lParam' parameter just like this: CXTPPropertyGridItem* pItem = (CXTPPropertyGridItem*)lParam;    
But when I look at pItem internals, I can see that some members have wrong values, but it looks like that my object was created successfully in 
AddChildItem method. In general all my steps on working with grid amd creation/using custom controls are very similar to steps provided in sample 'PropertyGrid' project. What can source similar problem? And how is better 
to fix/overcome such terrible situation? I can provide additional information if needed. Thanx in advance.

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Gorkystreet Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 04 July 2007 Location: Ukraine Status: Offline Points: 6	Post Options Post Reply Quote Gorkystreet Report Post Thanks(0) Quote Reply Topic: Cast in OnGridNotify() method Posted: 10 July 2007 at 7:42pm
	Hi all, I encountered the following problem: I created my custom control derived from CXTPPropertyGridItemEnum-class. I use it in grid (use the toolkit ver. 10.3.1). In OnGridNotify() method I need to spy for some events. In appropriate event I have to perform a cast from 'lParam' parameter just like this: CXTPPropertyGridItem* pItem = (CXTPPropertyGridItem*)lParam; But when I look at pItem internals, I can see that some members have wrong values, but it looks like that my object was created successfully in AddChildItem method. In general all my steps on working with grid amd creation/using custom controls are very similar to steps provided in sample 'PropertyGrid' project. What can source similar problem? And how is better to fix/overcome such terrible situation? I can provide additional information if needed. Thanx in advance.

Oleg Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 21 May 2003 Location: United States Status: Offline Points: 11234	Post Options Post Reply Quote Oleg Report Post Thanks(0) Quote Reply Posted: 11 July 2007 at 12:02am
	Hello, lParam in OnGridNotify is not always CXTPPropertyGridItem. you need check wParam first. What wParam you need ?
	Oleg, Support Team CODEJOCK SOFTWARE SOLUTIONS

Gorkystreet Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 04 July 2007 Location: Ukraine Status: Offline Points: 6	Post Options Post Reply Quote Gorkystreet Report Post Thanks(0) Quote Reply Posted: 11 July 2007 at 4:24am
	Hmm, it is very interesting. I use some codes, such as XTP_PGN_EDIT_CHANGED, XTP_PGN_SELECTION_CHANGED, XTP_PGN_ITEMVALUE_CHANGED, can you say to what lParam points for each of these codes, and for those codes which are defined but not listed here? thank you. It is possible that I will have to add some more custom codes to work on grid events. How can I do this? and if I will use this code what object reference will be pointed by lParam?

Oleg Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 21 May 2003 Location: United States Status: Offline Points: 11234	Post Options Post Reply Quote Oleg Report Post Thanks(0) Quote Reply Posted: 11 July 2007 at 5:35am
	Hi, in XTP_PGN_EDIT_CHANGED lParam is CXTPPropertyGridInplaceEdit* pEdit = DYNAMIC_DOWNCAST(CXTPPropertyGridInplaceEdit, (CWnd)lParam); for XTP_PGN_SELECTION_CHANGED, XTP_PGN_ITEMVALUE_CHANGED CXTPPropertyGridItem pItem = (CXTPPropertyGridItem)lParam; for XTP_PGN_INPLACEBUTTONDOWN CXTPPropertyGridInplaceButton pButton = (CXTPPropertyGridInplaceButton*)lParam; please copy this code from our sample - Samples\PropertyGrid\GridSample\PropertyGridDlg.cpp
	Oleg, Support Team CODEJOCK SOFTWARE SOLUTIONS

Gorkystreet Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 04 July 2007 Location: Ukraine Status: Offline Points: 6	Post Options Post Reply Quote Gorkystreet Report Post Thanks(0) Quote Reply Posted: 12 July 2007 at 4:28pm
	Thank you Oleg, this information is right what I need.

Gorkystreet Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 04 July 2007 Location: Ukraine Status: Offline Points: 6	Post Options Post Reply Quote Gorkystreet Report Post Thanks(0) Quote Reply Posted: 12 July 2007 at 6:02pm
	Excuse me Oleg, I made some additional testing on my custom control and one problem is still having place. As I mentioned it is CXTPPropertyGridItemEnum-derived control with a check-box in it. I need obtain a pointer on it in XTP_PGN_EDIT_CHANGED notif. event. I'm failing the following method: CCustomItemCheckBox* pItem = DYNAMIC_DOWNCAST(CCustomItemCheckBox, (CWnd*)lParam); pItem is NULL in such case. What cast should I perform to obtain the proper pointer?

Oleg Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 21 May 2003 Location: United States Status: Offline Points: 11234	Post Options Post Reply Quote Oleg Report Post Thanks(0) Quote Reply Posted: 13 July 2007 at 5:29am
	Hi, Just wrote that lParam is CXTPPropertyGridInplaceEdit... You need CXTPPropertyGridInplaceEdit* pEdit = DYNAMIC_DOWNCAST(CXTPPropertyGridInplaceEdit, (CWnd)lParam); CCustomItemCheckBox pItem = DYNAMIC_DOWNCAST(CCustomItemCheckBox, pEdit ->GetItem());
	Oleg, Support Team CODEJOCK SOFTWARE SOLUTIONS

Gorkystreet Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 04 July 2007 Location: Ukraine Status: Offline Points: 6	Post Options Post Reply Quote Gorkystreet Report Post Thanks(0) Quote Reply Posted: 13 July 2007 at 4:59pm
	Great! Oleg, thank you very much!!! Now everything is fine! How do you think - maybe it is worth to include such sample cast into the some sample application with grid in it? I guess it would be very useful for such new toolkit users like me ;) Anyway thanks again!