具有不可伸缩高度行的QGridlLayout

Question

我正在尝试构建具有可伸缩宽度列但非可伸缩高度行的QGridLayout。网格位于QScrollArea内部，除了高度之外，几乎都可以使用。您可以在以下图像中看到它：

如您所见，行被垂直拉伸。如果行太少（第一张图片），我希望所有行都相等，并且不适合所有父级的高度。我应该触摸网格还是实际的小部件？

编辑：可复制的示例

import sys
from PyQt5.QtWidgets import (QWidget, QGridLayout, QLabel, QRadioButton, QApplication, QScrollArea, QVBoxLayout)

class ScrollableGrid(QWidget):

    def __init__(self, columnSpans, minimumColumnWidth):

        super().__init__()

        # Grid
        self.grid = QWidget()
        self.gridLayout = QGridLayout()

        for i in range(len(columnSpans)):
            self.gridLayout.setColumnStretch(i, columnSpans[i])
            self.gridLayout.setColumnMinimumWidth(i, columnSpans[i] * minimumColumnWidth)

        self.grid.setLayout(self.gridLayout)

        # Scroll area
        self.scrollArea = QScrollArea()
        self.scrollArea.setWidget(self.grid)
        self.scrollArea.setWidgetResizable(True)

        # Compute the correct minimum width
        width = (self.grid.sizeHint().width() +
                 self.scrollArea.verticalScrollBar().sizeHint().width() +
                 self.scrollArea.frameWidth() * 2)

        self.scrollArea.setMinimumWidth(width)

        # Layout
        self.layout = QVBoxLayout()
        self.layout.addWidget(self.scrollArea)
        self.setLayout(self.layout)


    def addRow(self, row, elements):
        for column in range(len(elements)):
            self.gridLayout.addWidget(elements[column], row, column)


class MainWindow(QWidget):

    def __init__(self):

        super().__init__()

        # ScrollableGrid
        self.grid = ScrollableGrid(columnSpans=[1,2,3], minimumColumnWidth=100)

        # Add rows
        for i in range(3):
            self.grid.addRow(i, [QLabel('A'), QLabel('B'), QRadioButton()])

        # Window layout
        self.layout = QVBoxLayout()
        self.layout.addWidget(self.grid)
        self.setLayout(self.layout)


if __name__ == '__main__':

    app = QApplication(sys.argv)
    windowExample = MainWindow()
    windowExample.show()
    sys.exit(app.exec_())

Answer 1

void QGridLayout :: setRowStretch（int row，int Stretch）

设置要拉伸的行的拉伸因子。第一行是数字0。

拉伸因子相对于此网格中的其他行。具有较高拉伸因子的行会占用更多可用空间。

是的，是因为添加完所有行后必须调用它吗？

import sys
from PyQt5.QtWidgets import (QWidget, QGridLayout, QLabel, QRadioButton, 
                             QApplication, QScrollArea, QVBoxLayout)

class ScrollableGrid(QWidget):
    def __init__(self, columnSpans, minimumColumnWidth):
        super().__init__()

        # Grid
        self.grid = QWidget()
        self.gridLayout = QGridLayout()

        for i in range(len(columnSpans)):
            self.gridLayout.setColumnStretch(i, columnSpans[i])
            self.gridLayout.setColumnMinimumWidth(i, columnSpans[i] * minimumColumnWidth)
        self.grid.setLayout(self.gridLayout)

        # Scroll area
        self.scrollArea = QScrollArea()
        self.scrollArea.setWidget(self.grid)
        self.scrollArea.setWidgetResizable(True)

        # Compute the correct minimum width
        width = (self.grid.sizeHint().width() +
                 self.scrollArea.verticalScrollBar().sizeHint().width() +
                 self.scrollArea.frameWidth() * 2)
        self.scrollArea.setMinimumWidth(width)

        # Layout
        self.layout = QVBoxLayout()
        self.layout.addWidget(self.scrollArea)
        self.setLayout(self.layout)

    def addRow(self, row, elements):
        for column in range(len(elements)):
            self.gridLayout.addWidget(elements[column], row, column)


class MainWindow(QWidget):
    def __init__(self):
        super().__init__()

        # ScrollableGrid
        self.grid = ScrollableGrid(columnSpans=[1,2,3], minimumColumnWidth=100)

        # Add rows
        for i in range(3):
            self.grid.addRow(i, [QLabel('A'), QLabel('B'), QRadioButton()])

        self.grid.gridLayout.setRowStretch(111, 1)                                # !!!

        # Window layout
        self.layout = QVBoxLayout()
        self.layout.addWidget(self.grid)
        self.setLayout(self.layout)


if __name__ == '__main__':
    app = QApplication(sys.argv)
    windowExample = MainWindow()
    windowExample.show()
    sys.exit(app.exec_())