East Agent's Blog

원문:
http://phenixyu.blogspot.com/2007/03/using-directx-with-wxwidget.html

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);
}

@EDIT
DirectX 응용 프로그램에 wxWidget을 사용하는 방법에 대한 코드. 최근에는 wxEntry 가 추가되어 위의 코드와는 조금 다를지도 모르겠다. 그냥 이런 부분을 신경 써야 하는구나 - 정도로 읽으면 되겠다. 실제로 wxWidget을 사용하여 제대로 된 툴을 만들고 싶으신 분들은 Nocturnal Initiative에 관심을 가질 것.