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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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29
flatlaf-natives/flatlaf-natives-windows/README.md
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@@ -19,3 +19,32 @@ The DLLs were built on a GitHub server with the help of GitHub Actions. See:
[Native Libraries](https://github.com/JFormDesigner/FlatLaf/actions/workflows/natives.yml)
workflow. Then the produced Artifacts ZIP was downloaded, signed DLLs with
FormDev Software code signing certificate and committed the DLLs to Git.
## Development
To build the library on Windows using Gradle, (parts of)
[Visual Studio Community
2022](https://visualstudio.microsoft.com/downloads/)
needs to be installed. After downloading and running `VisualStudioSetup.exe` the
**Visual Studio Installer** is installed and started. Once running, it shows the
**Workloads** tab that allows you to install additional packages. Either choose
**Desktop development with C++**, or to save some disk space switch to the
**Single Components** tab and choose following components (newest versions):
- MSVC v143 - VS 2022 C++ x64/x86 Buildtools
- MSVC v143 - VS 2022 C++ ARM64/ARM64EC Buildtools
- Windows 11 SDK
Note that the Visual Studio Installer shows many similar named components for
MSVC. Make sure to choose exactly those components listed above.
Using
[Build Tools for Visual Studio 2022](https://visualstudio.microsoft.com/downloads/#remote-tools-for-visual-studio-2022)
(installs only compiler and SDKs) instead of
[Visual Studio Community
2022](https://visualstudio.microsoft.com/downloads/)
does not work with Gradle.
[Visual Studio Code](https://code.visualstudio.com/) with **C/C++** extension
can be used for C++ code editing.

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+