python - 将 QStyles 添加到 Pyqt5

Question

我正在将我的 GUI 应用程序从 PyQt4 转换为 PyQt5。但是在 PyQt4 中，我们得到了很多 QStyle，比如 plastique , Cleanlooks等等 但是在 PyQt5 中我们只有 Fusion样式以及一些普通的旧 Windows 样式。
我们如何向 PyQt5 添加更多自定义样式？

Answer 1

Qt 的许多功能都是由插件实现的，样式就是这种情况。所以在这种情况下你必须编译qtstyleplugins:
您可以使用以下过程来编译 qtstyleplugins:

在 Windows 上安装 MSVC 2019，在 MacOS 上安装 XCode，在 Ubuntu 上安装 build-essential(如果是另一个发行版，那么你应该寻找等效的)。

安装 Qt，与编译 pyqt5 的版本相同:python -c "from PyQt5.QtCore import QT_VERSION_STR; print('Qt version', QT_VERSION_STR)" .

克隆存储库，然后通过执行以下命令编译它(在 Windows 的情况下，您必须将 make 更改为 nmake):

git clone https://code.qt.io/qt/qtstyleplugins.git
cd qtstyleplugins
qmake 
make 
make install

这些命令将在文件夹“qtstyleplugins/plugins/styles/”中生成二进制文件(Linux 为 .so，Windows 为 .dll，MacOS 为 .dylib)，您必须将其复制到路径:

python -c "import os; from PyQt5 import QtCore; print(os.path.join(QtCore.QLibraryInfo.location(QtCore.QLibraryInfo.PluginsPath), 'styles'))"

输出:

/home/qtuser/Documents/qt_venv/lib/python3.8/site-packages/PyQt5/Qt/plugins/styles

为了方便工作，我创建了一个 github 操作来生成二进制文件:
63477276.yml

name: question_63477276

on: [push]

jobs:
  ci:
    name: ${{ matrix.os.name }} Python-${{ matrix.python }} Qt-${{ matrix.qt }}
    runs-on: ${{ matrix.os.runs-on }}
    strategy:
      fail-fast: false
      matrix:
        os:
          - name: Windows
            extension: "*.dll"
            runs-on: windows-latest
          - name: Linux
            extension: "*.so"
            runs-on: ubuntu-latest
          - name: MacOS
            extension: "*.dylib"
            runs-on: macos-latest
        python: [3.6, 3.7, 3.8]
        qt: [5.15.0]

    steps:
      - name: Checkout
        uses: actions/checkout@v1
      - name: Install Linux dependencies
        if: matrix.os.name == 'Linux'
        run: |
          sudo apt-get install '^libxcb.*-dev' libx11-xcb-dev libglu1-mesa-dev libxrender-dev libxi-dev libxkbcommon-dev libxkbcommon-x11-dev
      - name: Set up Python
        uses: actions/setup-python@v2
        with:
          python-version: ${{ matrix.python }}
          architecture: x64
      - name: install pyqt5
        run: pip install pyqt5
      - name: before
        uses: GabrielBB/xvfb-action@v1.2
        with:
          run: python -c "from PyQt5 import QtWidgets; app = QtWidgets.QApplication([]); print(QtWidgets.QStyleFactory.keys())"
      - name: Install Qt
        uses: jurplel/install-qt-action@v2
        with:
          version: ${{ matrix.qt }}
          dir: ${{ github.workspace }}/qt/
      - name: clone qtstyleplugins
        run: git clone https://code.qt.io/qt/qtstyleplugins.git
      - name: compile qtstyleplugins in Windows
        if: matrix.os.name == 'Windows'
        shell: cmd
        run: |
          call "C:/Program Files (x86)/Microsoft Visual Studio/2019/Enterprise/VC/Auxiliary/Build/vcvars64.bat"
          cd qtstyleplugins
          qmake
          nmake
          nmake install
      - name: compile qtstyleplugins in Linux or MacOS
        if: matrix.os.name == 'Linux' || matrix.os.name == 'MacOS'
        run: |
          cd qtstyleplugins
          qmake
          make
          make install
      - name: copy binaries
        run: python questions/63477276/search_binaries.py qtstyleplugins/plugins/styles/
      - name: after
        uses: GabrielBB/xvfb-action@v1.2
        with:
          run: python -c "from PyQt5 import QtWidgets; app = QtWidgets.QApplication([]); print(QtWidgets.QStyleFactory.keys())"
      - name: upload
        uses: actions/upload-artifact@v2
        with:
          path: qtstyleplugins/plugins/styles/${{ matrix.os.extension }}
          name: qtstyleplugins-${{ matrix.os.name }}-Python${{ matrix.python }}-Qt${{ matrix.qt }}

您可以从 here 下载 pyqt5 5.15 的二进制文件.
测试:

python -c "from PyQt5 import QtWidgets; app = QtWidgets.QApplication([]); print(QtWidgets.QStyleFactory.keys())"

输出:

['bb10dark', 'bb10bright', 'cleanlooks', 'cde', 'motif', 'plastique', 'windowsvista', 'Windows', 'Fusion']