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Fix CreateWindow client size

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CreateWindow(Ex) size parameters actually accepts outer window dimensions containing caption and border, which we can calculate with AdjustWindowRect by giving client size window dimensions.
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Philosoph228 2025-03-24 03:21:19 +05:00
parent e0fffb64fe
commit d9c68cd32d
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1 changed files with 9 additions and 2 deletions
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11
examples/win32_gdi/main.c
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@ -26,6 +26,9 @@ void CenterWindow(HWND hWnd);
long lastMsgTime = 0;
bool ui_debug_mode;
#define RECTWIDTH(rc) ((rc).right - (rc).left)
#define RECTHEIGHT(rc) ((rc).bottom - (rc).top)
LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
@ -165,6 +168,10 @@ int APIENTRY WinMain(
if (FALSE == RegisterClass(&wc))
return 0;
// Calculate window rectangle by given client size
// TODO: AdjustWindowRectExForDpi for DPI support
RECT rcWindow = { .right = 800, .bottom = 600 };
AdjustWindowRect(&rcWindow, WS_OVERLAPPEDWINDOW, FALSE);
hwnd = CreateWindow(
szAppName,
@ -172,8 +179,8 @@ int APIENTRY WinMain(
WS_OVERLAPPEDWINDOW | WS_VISIBLE,
CW_USEDEFAULT,
CW_USEDEFAULT,
800, // CW_USEDEFAULT,
600, // CW_USEDEFAULT,
RECTWIDTH(rcWindow), // CW_USEDEFAULT,
RECTHEIGHT(rcWindow), // CW_USEDEFAULT,
0,
0,
hInstance,