[pgadmin-hackers] Linux QueryBuilder error

[Adam H . Pendleton]

I have tracked down the QueryBuilder error, and it's not a wxWindows error, per se. The problem lies in the frmQueryBuilder::OnSize() event handler. Basically, the QueryBuilder form receives the OnSize event *before* the form has been created. Here is a thread from the wxWindows list, discussing a similar problem a user had with a Windows application:

http://lists.wxwindows.org/archive/wx-users/msg05277.html

Our situation is a bit different, because the code called by frmQueryBuilder::OnSize is wxWindows code, and not custom code, but....here is the problem. In src/generic/laywin.cpp (from wxWindows), the LayoutMDIFrame() function, calls the following code:

wxWindow* clientWindow = frame->GetClientWindow();

rect = event.GetRect();

clientWindow->SetSize(rect.x, rect.y, rect.width, rect.height);

Basically, frame->GetClientWindow() returns NULL, causing SetSize (which is a macro) to cause a segfault in DoSetSize(clientWindow, etc.). The variable 'frame' is passed to LayoutMDIFrame by our code: LayoutMDIFrame(this).
frame->GetClientWindow() is indeed null as frame->m_clientWindow = 0x0. I am looking for a solution to the problem, but I wanted to send it to the list in case someone could fix it faster than I could.

ahp

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