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Add emulateIndependentWindows flag to DirectX example

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If the flag is set, the example tries to behave as if the ImGui
windows were first-class citizens in OS windowing.
The current approach has a few limitations:
 - framerate is significantly lower than in the original example
 - mouse movements that start inside the window cannot extend to the outside
   it, that is, resizing, moving and scrolling does not work too good
 - the process is not closed when all of the windows are closed
This commit is contained in:
Daniel Krikun 2014-08-15 23:32:02 +03:00
parent f5dbb0a973
commit 0ca29fa273
1 changed files with 16 additions and 2 deletions
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18
examples/directx9_example/main.cpp
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@ -7,6 +7,8 @@
#pragma warning (disable: 4996) // 'This function or variable may be unsafe': strdup
static bool emulateIndependentWindows = true;
static HWND hWnd;
static LPDIRECT3D9 g_pD3D = NULL; // Used to create the D3DDevice
static LPDIRECT3DDEVICE9 g_pd3dDevice = NULL; // Our rendering device
@ -251,12 +253,24 @@ void UpdateImGui()
int WINAPI wWinMain(HINSTANCE hInst, HINSTANCE, LPWSTR, int)
{
UINT style = emulateIndependentWindows? CS_HREDRAW | CS_VREDRAW : CS_CLASSDC;
// Register the window class
WNDCLASSEX wc = { sizeof(WNDCLASSEX), CS_CLASSDC, MsgProc, 0L, 0L, GetModuleHandle(NULL), NULL, NULL, NULL, NULL, L"ImGui Example", NULL };
WNDCLASSEX wc = { sizeof(WNDCLASSEX), style, MsgProc, 0L, 0L, GetModuleHandle(NULL), NULL, NULL, NULL, NULL, L"ImGui Example", NULL };
RegisterClassEx(&wc);
// Create the application's window
hWnd = CreateWindow(L"ImGui Example", L"ImGui DirectX9 Example", WS_OVERLAPPEDWINDOW, 100, 100, 1280, 800, NULL, NULL, wc.hInstance, NULL);
if(emulateIndependentWindows)
{
int screenWidth = GetSystemMetrics(SM_CXSCREEN);
int screenHeight = GetSystemMetrics(SM_CYSCREEN);
hWnd = CreateWindowEx(WS_EX_LAYERED | WS_EX_TOPMOST, L"ImGui Example",
L"ImGui DirectX9 Example", WS_POPUP, 0, 0, screenWidth, screenHeight, NULL, NULL, wc.hInstance, NULL);
SetLayeredWindowAttributes(hWnd, RGB(204, 153, 153), 255, LWA_COLORKEY);
}
else
{
hWnd = CreateWindow(L"ImGui Example", L"ImGui DirectX9 Example", WS_OVERLAPPEDWINDOW, 100, 100, 1280, 800, NULL, NULL, wc.hInstance, NULL);
}
if (!QueryPerformanceFrequency((LARGE_INTEGER *)&ticks_per_second))
return 1;