//
//Internal message procedure called from Wrapper function above
//
LRESULT Window::MsgProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
Root *root = Root::getInstance();
RenderSystem * rs = RenderSystem::getInstance();
switch( msg )
{
// WM_ACTIVATE is sent when the window is activated or deactivated.
// We pause the game when the window is deactivated and unpause it
// when it becomes active.
case WM_ACTIVATE:
if( LOWORD(wParam) == WA_INACTIVE )
{
root->pauseApp();
}
else
{
root->startApp();
}
return 0;
// WM_SIZE is sent when the user resizes the window.
case WM_SIZE:
// Save the new client area dimensions.
mClientWidth = LOWORD(lParam);
mClientHeight = HIWORD(lParam);
if( rs->getDevice() ) {
if( wParam == SIZE_MINIMIZED ) //if minimzed then pause the app
{
root->pauseApp();
mMinimized = true;
mMaximized = false;
}
else if( wParam == SIZE_MAXIMIZED ) //if maximized then make sure app is running
{
root->startApp();
mMinimized = false;
mMaximized = true;
rs->OnResize(); //react to resize by reallocating back buffer
}
else if( wParam == SIZE_RESTORED ) //size is restored from minized state
{
// Restoring from minimized state?
if( mMinimized )
{
root->startApp();
mMinimized = false;
rs->OnResize(); //react to resize by reallocating back buffer
}
// Restoring from maximized state?
else if( mMaximized )
{
root->startApp();
mMaximized = false;
rs->OnResize(); //react to resize by reallocating back buffer
}
else if( mResizing )
{
// If user is dragging the resize bars, we do not resize
// the buffers here because as the user continuously
// drags the resize bars, a stream of WM_SIZE messages are
// sent to the window, and it would be pointless (and slow)
// to resize for each WM_SIZE message received from dragging
// the resize bars. So instead, we reset after the user is
// done resizing the window and releases the resize bars, which
// sends a WM_EXITSIZEMOVE message.
}
else // API call such as SetWindowPos or mSwapChain->SetFullscreenState.
{
rs->OnResize();
}
}
}
return 0;
// WM_ENTERSIZEMOVE is sent when the user grabs the resize bars.
case WM_ENTERSIZEMOVE:
root->pauseApp();
mResizing = true;
return 0;
// WM_EXITSIZEMOVE is sent when the user releases the resize bars.
// Here we reset everything based on the new window dimensions.
case WM_EXITSIZEMOVE:
root->startApp();
mResizing = false;
rs->OnResize();
return 0;
case WM_KEYDOWN: //was ESC pressed? Then close the app
if( wParam == VK_ESCAPE ) {
::DestroyWindow(hwnd);
return 0;
}
break;
case WM_LBUTTONDOWN:
case WM_MBUTTONDOWN:
case WM_RBUTTONDOWN:
SetCapture(hwnd); // Capture mouse movement and mouse button up events outside the application window
break;
case WM_LBUTTONUP:
case WM_MBUTTONUP:
case WM_RBUTTONUP:
ReleaseCapture(); // Stop capturing mouse movement and mouse button up events outside the application window
break;
case WM_DESTROY: // In the case of a destroy message, then
::PostQuitMessage(0);
return 0;
}
if( !root->MsgProc( hwnd, msg, wParam, lParam ) ) //send to frame listeners!
return 0;
return DefWindowProc(hwnd, msg, wParam, lParam); //if no listeners consumed the message, send to default
}
