Using DirectX with wxWidget

wxWidgets A.K.A. wxWindow is a cross-platform toolkit for creating window application. There is a class called wxGLCanvas for OpenGL, but no information for DirectX. Then, I try to integrate DirectX with wxWidgets. I found flick will happen when I use paint event to draw d3d frame. To avoid from flicking, I use erase event to clear the background of window and redraw d3d frame. Here is the pseudo code:

class MyApp : public wxApp {
virtual bool OnInit();
virtual int OnExit();
};
class MyViewport : public wxPanel {
public:
MyViewport(wxWindow* parent);
void OnIdle(wxIdleEvent& event);
void OnDraw(wxEraseEvent& event);
private:
DECLARE_EVENT_TABLE()
};

class MyFrame: public wxFrame {
MyViewport *mpViewport;
public:
MyFrame(const wxString& title);
private:
DECLARE_EVENT_TABLE()
};

// the event tables connect the wxWidgets events with the functions (event
// handlers) which process them. It can be also done at run-time, but for the
// simple menu events like this the static method is much simpler.
BEGIN_EVENT_TABLE(MyViewport, wxPanel)
EVT_ERASE_BACKGROUND (MyViewport::OnDraw)
EVT_IDLE (MyViewport::OnIdle)
END_EVENT_TABLE()

// Create a new application object: this macro will allow wxWidgets to create
// the application object during program execution (it's better than using a
// static object for many reasons) and also implements the accessor function
// wxGetApp() which will return the reference of the right type (i.e. MyApp and not wxApp)
IMPLEMENT_APP(MyApp)

// 'Main program' equivalent: the program execution "starts" here
bool MyApp::OnInit() {
// create the main application window
MyFrame *frame = new MyFrame( _T("D3D sample") );

create D3D device here

frame->Show(true);
SetTopWindow(frame);
return true;
}

int MyApp::OnExit() {
release D3D device here

return wxApp::OnExit();
}

// frame constructor
MyFrame::MyFrame(const wxString& title) :
wxFrame(NULL, -1, title, wxPoint(0,0)), mpViewport(NULL), mpTreeCtrl(NULL)
{
mpViewport = new MyViewport(this);
}

MyViewport::MyViewport(wxWindow* parent) : wxPanel(parent) {
}

void MyViewport::OnIdle(wxIdleEvent& event) {
update your d3d objects here

// call Refresh() to send a wxEraseEvent to redraw a frame
Refresh();
}

void MyViewport::OnDraw(wxEraseEvent& event) {
g_pd3dDevice->BeginScene();

draw your d3d objects here

g_pd3dDevice->EndScene();
g_pd3dDevice->Present(NULL,NULL, this->GetHWND() ,NULL);
}