Method WindowProc

source/visualization/OpenGL/src/G4OpenGLWin32Viewer.cc:211–354

/////////////////////////////////////////////////////////////////////////

//////////////////////////////////////////////////////////////////////////////
LRESULT CALLBACK G4OpenGLWin32Viewer::WindowProc(
 HWND aWindow
,UINT aMessage
,WPARAM aWParam
,LPARAM aLParam
)
//////////////////////////////////////////////////////////////////////////////
//!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!//
{
  switch (aMessage) {
    case WM_SIZE: {
      //FIXME : have to handle WM_RESIZE
      // Seems to be done (ovidio.pena AT upm.es, 2021/02/23)
      auto* This = (G4OpenGLWin32Viewer*)
                   ::GetWindowLongPtr(aWindow, GWLP_USERDATA);
      if (This) {
        This->fWinSize_x = (G4int) LOWORD(aLParam);
        This->fWinSize_y = (G4int) HIWORD(aLParam);
        if (!This->fInCreateWindow) {
          This->SetView();
          glViewport(0, 0, This->fWinSize_x, This->fWinSize_y);
          This->DrawView();
        }
      }
      return 0;
    }

    case WM_PAINT: {
      PAINTSTRUCT ps;
      BeginPaint(aWindow, &ps);
      auto* This = (G4OpenGLWin32Viewer*)
                   ::GetWindowLongPtr(aWindow, GWLP_USERDATA);
      if (This) {
        //FIXME : To have an automatic refresh someone have to redraw here.
        // Seems to be done (ovidio.pena AT upm.es, 2021/02/23)
        if(!This->fInCreateWindow) {
          This->SetView();
          This->ClearView();
          This->DrawView();
        }
      }
      EndPaint(aWindow, &ps);
      return 0;
    }

    case WM_LBUTTONDOWN: {
      auto* This = (G4OpenGLWin32Viewer*)
                   ::GetWindowLongPtr(aWindow, GWLP_USERDATA);
      This->TrackMouse(LOWORD(aLParam), HIWORD(aLParam));
      return 0;
    }

    case WM_RBUTTONDOWN: {
      auto* This = (G4OpenGLWin32Viewer*)
                   ::GetWindowLongPtr(aWindow, GWLP_USERDATA);
      This->TrackMouse(LOWORD(aLParam), HIWORD(aLParam));
      return 0;
    }