如何在 Qt 中使用间隔符 [英] How to use spacers in Qt

问题描述

我有一个 QGroupBox 分配给它 QVBoxLayout.

I have a QGroupBox with assigned to it QVBoxLayout.

groupBox = QtGui.QGroupBox()
layout = QtGui.QVBoxLayout()
groupBox.setLayout(layout )

然后有一个 QLabel 分配给布局.

Then there is a single QLabel assigned to the layout.

label = QtGui.QLabel()   
layout.addWidget(label)

问题是QLabel定位在GroupBox的中间.虽然我希望它与 GroupBox 的顶部边缘对齐.我可能需要添加某种间隔.因此，间隔器会动态调整自身大小以填充 GroupBox 的空白区域，向上推动 QLabel.

The problem is that QLabel is positioned at the middle of the GroupBox. While I want it to be aligned with the top edge of the GroupBox. I probably need to add some sort of spacer. So the spacer would dynamically resize itself to fill the GroupBox's empty area pushing QLabel upward.

应该使用什么小部件和什么尺寸策略作为间隔?

What widget and what size policy should be used as a spacer?

推荐答案

label = QtGui.QLabel()   
layout.addWidget(label)
verticalSpacer = QtGui.QSpacerItem(20, 40, QtGui.QSizePolicy.Minimum, QtGui.QSizePolicy.Expanding)
layout.addItem(verticalSpacer)

这应该有效

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