如何让QLineEdit在QScrollArea内展开

发布于 2024-08-22 09:04:01 字数 934 浏览 11 评论 0原文

我在 QWidget 中有一个 QLabel 和一个 QLineEdit。当我将小部件放在 QScrollArea 内时，行编辑不会扩展以占据窗口的多余宽度。当小部件不在滚动区域内时，它会展开。

我尝试设置行编辑和小部件的大小策略以水平扩展，但它不会占用多余的空间。我怀疑小部件的 sizeHint() 在滚动区域内时被压缩。有什么想法可以让这项工作发挥作用吗？

class MainWindow(QtGui.QMainWindow):
def __init__(self):
    QtGui.QMainWindow.__init__(self, None)
    self.setWindowTitle('Test Window')
    self.resize(500, 250)

    scrollArea = QtGui.QScrollArea()
    scrollWidget = QtGui.QWidget()
    scrollWidget.setSizePolicy(QtGui.QSizePolicy.Expanding, QtGui.QSizePolicy.Maximum)

    layout = QtGui.QGridLayout(scrollWidget)
    label = QtGui.QLabel("Name:")
    layout.addWidget(label, 0, 0)
    lineEdit = QtGui.QLineEdit("Value")
    lineEdit.setSizePolicy(QtGui.QSizePolicy.Expanding, QtGui.QSizePolicy.Maximum)
    layout.addWidget(lineEdit, 0, 1)
    scrollWidget.setLayout(layout)

    scrollArea.setWidget(scrollWidget)
    self.setCentralWidget(scrollArea)

原文

I have a QLabel and a QLineEdit inside a QWidget. When I have the widget inside a QScrollArea, the line edit does not expand to occupy the excess width of the window. When the widget is not inside the scroll area, it does expand.

I've tried setting the size policy of the line edit and the widget, to expand horizontally, but it doesn't occupy the excess space. I suspect the sizeHint() of the widget is compacted when inside a scroll area. Any ideas how to make this work?

class MainWindow(QtGui.QMainWindow):
def __init__(self):
    QtGui.QMainWindow.__init__(self, None)
    self.setWindowTitle('Test Window')
    self.resize(500, 250)

    scrollArea = QtGui.QScrollArea()
    scrollWidget = QtGui.QWidget()
    scrollWidget.setSizePolicy(QtGui.QSizePolicy.Expanding, QtGui.QSizePolicy.Maximum)

    layout = QtGui.QGridLayout(scrollWidget)
    label = QtGui.QLabel("Name:")
    layout.addWidget(label, 0, 0)
    lineEdit = QtGui.QLineEdit("Value")
    lineEdit.setSizePolicy(QtGui.QSizePolicy.Expanding, QtGui.QSizePolicy.Maximum)
    layout.addWidget(lineEdit, 0, 1)
    scrollWidget.setLayout(layout)

    scrollArea.setWidget(scrollWidget)
    self.setCentralWidget(scrollArea)

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悲喜皆因你 2024-08-29 09:04:02

我相信我已经解决了你的问题。

在您的代码中添加以下内容，它应该正确运行：

    ...

    scrollArea.setWidget(scrollWidget)
    scrollArea.setWidgetResizable(True) #add this
    self.setCentralWidget(scrollArea)

    ...

来自文档,

小部件可调整大小：布尔
此属性保存滚动区域是否应调整视图小部件的大小。
如果此属性设置为 true，滚动区域将自动调整小部件的大小，以避免滚动条，或者利用额外的空间。

I believe I have solved your problem.

Make the following addition to your code and it should behave correctly:

    ...

    scrollArea.setWidget(scrollWidget)
    scrollArea.setWidgetResizable(True) #add this
    self.setCentralWidget(scrollArea)

    ...

From the docs,

widgetResizable : bool
This property holds whether the scroll area should resize the view widget.
If this property is set to true, the scroll area will automatically resize the widget in order to avoid scroll bars where they can be avoided, or to take advantage of extra space.

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