Code::Blocks Forums
Developer forums (C::B DEVELOPMENT STRICTLY!) => Plugins development => Topic started by: nanyu on February 19, 2010, 04:36:56 am
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step1: I create a new wx GUI(frame) project. and it use wxsmith.
step2: I place a wxPanel on the frame, and named it PanelGame
step3: I custom the panel's onpaint event by wxSmith. now , I got this code:
PanelGame->Connect(wxEVT_PAINT,(wxObjectEventFunction)&wxTerisFrame::OnPanelGamePaint,0,this);
... strange thing happen now... compile..link..and run this program... NOW, I can't close this program's main window. I click the close button which on the window's caption, It do nothing .
AND: the OnPanel event didn't been called.
step4 : I modify the code:
//PanelGame->Connect(wxEVT_PAINT,(wxObjectEventFunction)&wxTerisFrame::OnPanelGamePaint,0,this);
PanelGame->Connect(wxEVT_PAINT,(wxObjectEventFunction)&wxTerisFrame::OnPanelGamePaint,0, 0);
now everything ok!
Is It a bug of wxWidgets (2.8.10/ wxMSW, compiled by mingw gcc 4.4.0)? or a bug of wxSmith?
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sorry for my poor Engilsh.
code::blocks svn6088. mingw gcc 4.4.0. windows xp.
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step4 : I modify the code:
//PanelGame->Connect(wxEVT_PAINT,(wxObjectEventFunction)&wxTerisFrame::OnPanelGamePaint,0,this);
PanelGame->Connect(wxEVT_PAINT,(wxObjectEventFunction)&wxTerisFrame::OnPanelGamePaint,0, 0);
now everything ok!
No, it isn't, not really. If you want it to work properly, put the code back the way that it was originally.
In addition, the wxPaintEvent event requires that you create a wxPaintDC for the target window (component) within the paint event code. If you do not create this DC, then the code stack may become corrupted, and you might see things such as the program not closing correctly.
Get a copy of the wxWidgets documentation and read about the wxPaintEvent.
Ringo
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step4 : I modify the code:
//PanelGame->Connect(wxEVT_PAINT,(wxObjectEventFunction)&wxTerisFrame::OnPanelGamePaint,0,this);
PanelGame->Connect(wxEVT_PAINT,(wxObjectEventFunction)&wxTerisFrame::OnPanelGamePaint,0, 0);
now everything ok!
No, it isn't, not really. If you want it to work properly, put the code back the way that it was originally.
In addition, the wxPaintEvent event requires that you create a wxPaintDC for the target window (component) within the paint event code. If you do not create this DC, then the code stack may become corrupted, and you might see things such as the program not closing correctly.
Get a copy of the wxWidgets documentation and read about the wxPaintEvent.
Ringo
Thank you, you are right.
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I have the same problem and I have the DC:
see:
http://forums.codeblocks.org/index.php/topic,12018.0.html
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I had tried a lot of things but I don't understand why putting the (wxPaintDC dc(this);) doesn't work for me.
I'll apreciate any suggestion.
best regard
ppv
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I had tried a lot of things but I don't understand why putting the (wxPaintDC dc(this);) doesn't work for me.
I'll apreciate any suggestion.
best regard
ppv
The "this" in wxPaintDC(this) refers to the wrong object; it normally refers to the parent frame or dialog of yur project, not to the particular panel (or other object) that you want to paint. Therefore your are creating the wrong wxPaintDC. You MUST create a wxPaintDC for the individual component that called the paint event.
Ringo
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THANK YOU!!!!!!!!!!!!!!!!!!!!!!!!!!!! that's fix it.