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Windows: fixed wrong layout in maximized frame after changing screen scale factor (issue #904)

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Windows binaries built and signed locally in clean workspace
This commit is contained in:
Karl Tauber
2024-11-17 19:41:54 +01:00
parent ee9e238592
commit c37712b0f0
10 changed files with 173 additions and 2 deletions
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17
flatlaf-natives/flatlaf-natives-windows/src/main/cpp/FlatWndProc.cpp
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@@ -288,6 +288,23 @@ LRESULT CALLBACK FlatWndProc::WindowProc( HWND hwnd, UINT uMsg, WPARAM wParam, L
isMoving = true;
break;
case WM_DPICHANGED: {
LRESULT lResult = ::CallWindowProc( defaultWndProc, hwnd, uMsg, wParam, lParam );
// if window is maximized and DPI/scaling changed, then Windows
// does not send a subsequent WM_SIZE message and Java window bounds,
// which depend on scale factor, are not updated
bool isMaximized = ::IsZoomed( hwnd );
if( isMaximized ) {
RECT* r = reinterpret_cast<RECT*>( lParam );
int width = r->right - r->left;
int height = r->bottom - r->top;
::CallWindowProc( defaultWndProc, hwnd, WM_SIZE, SIZE_MAXIMIZED, MAKELPARAM( width, height ) );
}
return lResult;
}
case WM_ERASEBKGND:
// do not erase background while the user is moving the window,
// otherwise there may be rendering artifacts on HiDPI screens with Java 9+