// The code below is from the wizard but it has been customized for this
// application. There is a custom code to handle WM_SIZE, WM_GESTURENOTIFY
// and WM_GESTURE messages.
//
// Processes messages for the main window:
// WM_COMMAND - process the application menu
// WM_SIZE - process resizing of client window
// WM_PAINT - paint the main window
// WM_DESTROY - post a quit message and return
// WM_GESTURENOTIFY - process a gesture notification message
// WM_GESTURE - process the gesture command
// in:
// hWnd window handle
// message message code
// wParam message parameter (message-specific)
// lParam message parameter (message-specific)
// returns:
// the result of the message processing and depends on the message sent
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
int wmId;
PAINTSTRUCT ps;
HDC hdc;
switch (message)
{
case WM_GESTURENOTIFY:
{
// This is the right place to define the list of gestures that this
// application will support. By populating GESTURECONFIG structure
// and calling SetGestureConfig function. We can choose gestures
// that we want to handle in our application. In this app we
// decide to handle all gestures.
GESTURECONFIG gc = {
0, // gesture ID
GC_ALLGESTURES, // settings related to gesture ID that are to be
// turned on
0 // settings related to gesture ID that are to be
// turned off
};
BOOL bResult = SetGestureConfig(
hWnd, // window for which configuration is specified
0, // reserved, must be 0
1, // count of GESTURECONFIG structures
&gc, // array of GESTURECONFIG structures, dwIDs will be processed in the
// order specified and repeated occurances will overwrite previous ones
sizeof(GESTURECONFIG) // sizeof(GESTURECONFIG)
);
if (!bResult)
{
ASSERT(L"Error in execution of SetGestureConfig" && 0);
}
}
break;
case WM_GESTURE:
// The gesture processing code is implemented in the CGestureEngine
// class.
return g_cGestureEngine.WndProc(hWnd,wParam,lParam);
break;
case WM_SIZE:
// resize rectangle and place it in the middle of the new client area
g_cRect.ResetObject(LOWORD(lParam),HIWORD(lParam));
break;
case WM_COMMAND:
wmId = LOWORD(wParam);
// Parse the menu selections:
switch (wmId)
{
case IDM_EXIT:
DestroyWindow(hWnd);
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
break;
case WM_PAINT:
hdc = BeginPaint(hWnd, &ps);
// Full redraw: background + rectangle
g_cRect.Paint(hdc);
EndPaint(hWnd, &ps);
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
return 0;
}
