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PyQt:如何将小部件粘贴到对话框的底部边缘

qapplication qtcore qtgui pyqt4 python

3

alphanumeric · 技术社区 · 10 年前

运行此代码将创建一个带有标签、lineedit和两个按钮的简单对话框。所有的小部件都能很好地响应对话框水平调整大小。但是当垂直调整对话框窗口的大小时,对话框底部的按钮不会粘在对话框窗口的下边缘。确保按钮始终位于对话框底部边缘的可能解决方案是什么?

from PyQt4 import QtCore, QtGui
app = QtGui.QApplication(sys.argv)



class mainWindow(QtGui.QMainWindow):

    def __init__(self):
        super(mainWindow, self).__init__()

        mainQWidget = QtGui.QWidget()
        mainLayout=QtGui.QFormLayout()
        mainLayout.setFieldGrowthPolicy(QtGui.QFormLayout.AllNonFixedFieldsGrow)

        label = QtGui.QLabel('My Label')  
        lineEdit = QtGui.QLineEdit()
        mainLayout.addRow(label, lineEdit)

        ButtonBox = QtGui.QGroupBox()
        ButtonsLayout = QtGui.QHBoxLayout()

        Button_01 = QtGui.QPushButton("Close")
        Button_02 = QtGui.QPushButton("Execute")

        ButtonsLayout.addWidget(Button_01)
        ButtonsLayout.addWidget(Button_02)

        ButtonBox.setLayout(ButtonsLayout)
        mainLayout.addRow(ButtonBox)

        mainQWidget.setLayout(mainLayout)
        self.setCentralWidget(mainQWidget)


if __name__ == '__main__':
    window = mainWindow()
    window.show()
    window.raise_() 
    window.resize(480,320)
    app.exec_()

1 回复 | 直到 10 年前

1

2

SoylentFuchsia 10 年前

我建议使用QVBoxLayout作为主布局,在QFormLayout和按钮的QHBoxLayout之间进行拉伸。

基于当前对话框的示例:

import sys
from PyQt4 import QtGui


class MainWindow(QtGui.QMainWindow):

    def __init__(self):
        super(MainWindow, self).__init__()

        label = QtGui.QLabel('My Label')
        line_edit = QtGui.QLineEdit()

        form_layout = QtGui.QFormLayout()
        form_layout.addRow(label, line_edit)

        close_button = QtGui.QPushButton('Close')
        execute_button = QtGui.QPushButton('Execute')

        button_layout = QtGui.QHBoxLayout()
        button_layout.addWidget(close_button)
        button_layout.addWidget(execute_button)

        main_layout = QtGui.QVBoxLayout()
        main_layout.addLayout(form_layout)
        main_layout.addStretch()
        main_layout.addLayout(button_layout)

        central_widget = QtGui.QWidget()
        central_widget.setLayout(main_layout)
        self.setCentralWidget(central_widget)


if __name__ == '__main__':
    app = QtGui.QApplication(sys.argv)
    window = MainWindow()
    window.resize(480, 320)
    window.show()
    sys.exit(app.exec_())