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README-WASM.md

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KDDockWidgets with WebAssembly

KDDockWidgets works with WebAssembly with the following known limitations:

  • Classic drop indicators are not supported, only the segmented ones. This is because WASM doesn't support windows with translucency.

  • Might be slow on Linux, depending on your browser, while dragging or resizing windows. Please file a bug with Qt, as it's out of scope for KDDW to fix.

Demo

A demo is available at https://demos.kdab.com/wasm/kddockwidgets/dockwidgets.html.

Build tips for KDDW

  • Visit https://doc.qt.io/qt-5/wasm.html if you haven't yet

  • Open a terminal suitable for WASM development (with the correct Qt and toolchain in PATH, etc)

  • KDDockWidgets can be built with:

    cmake \
      -DCMAKE_TOOLCHAIN_FILE=/usr/local/emsdk-1.39.8/upstream/emscripten/cmake/Modules/Platform/Emscripten.cmake
      -DCMAKE_FIND_ROOT_PATH=~/Qt/5.15.1/wasm_32/ -DKDDockWidgets_EXAMPLES=OFF -DCMAKE_BUILD_TYPE=Release`
    (Adapt the paths to your own situation)

Builds tips for your own app ==

  • Link to KDDW (libkddockwidgets.a, or similar)

  • As the build is static, don't forget to initialize KDDW's resources:

    #ifdef QT_STATIC
        Q_INIT_RESOURCE(kddockwidgets_resources);
    #endif