Docking Pane - XTP_DPN_SHOWWINDOW behavior changed in v13

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XTP_DPN_SHOWWINDOW behavior changed in v13

Printed From: Codejock Forums
Category: Codejock Products
Forum Name: Docking Pane
Forum Description: Topics Related to Codejock Docking Pane
URL: http://forum.codejock.com/forum_posts.asp?TID=13381
Printed Date: 23 November 2024 at 11:26am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com

Topic: XTP_DPN_SHOWWINDOW behavior changed in v13

Posted By: znakeeye
Subject: XTP_DPN_SHOWWINDOW behavior changed in v13
Date Posted: 10 February 2009 at 3:43pm

Upgraded to v13.0.0 from v12.1.1.

pMainPane = GetMainFrame().GetPaneManager().FindPane(IDR_EXISTING_PANE);

CWnd* pWndChild = pMainPane->GetChild(); // Returns NULL when pane has not been sized (zero-height in this case)!

It seems XTP_DPN_SHOWWINDOW is not sent when the pane has zero-height. Is this by design?

Anyway, such changes should be thoroughly documented!

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PokerMemento - http://www.pokermemento.com/

Replies:

Posted By: znakeeye
Date Posted: 10 February 2009 at 3:55pm

You check for empty rectangles in the ShowWindow() call. Can you please tell me how to make certain pane-children attached explicitly? When I call GetChild() from my other pane-manager, the child window must already be set!

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PokerMemento - http://www.pokermemento.com/

Posted By: Oleg
Date Posted: 11 February 2009 at 4:45am

Hi,

I compared sources with 12.1.1 - nothing that can change this behavior.

XTP_DPN_SHOWWINDOW called when pane become visible.

You can add method that attach panes and call it from CMainFrame::Create and from NotifyHandler.

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Oleg, Support Team
CODEJOCK SOFTWARE SOLUTIONS

Posted By: znakeeye
Date Posted: 11 February 2009 at 4:58am

The behavior might be the same in v12, but I encountered it in v13.

Let me clarify.

XTP_DPN_SHOWWINDOW is not sent when the the pane's rectangle is empty (IsRectEmpty). This should be documented as it could lead to strange behavior:

1) The user changes the size of a pane to zero-height and closes the application.

2) Pane is saved to the Registry.

3) Application is opened and the pane read from the Registry.

4) Since the child-window is created and attached in OnDockingPaneNotify(), the child will not be created until the pane is explicitly resized!

Perhaps create/attach should always be made in OnCreate() instead of OnDockingPaneNotify()?

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PokerMemento - http://www.pokermemento.com/