自动调整 QScrollArea 的大小

Question

我有一个包含复选框列表的滚动区域。我希望此滚动区域可以调整为应用程序的大小。无法弄清楚如何做到这一点。任何建议，将不胜感激。我在其他帖子中遇到过这个问题，但没有找到解决方案，或者至少没有找到我理解的解决方案。

from PyQt4 import QtGui, QtCore

class Screen3(QtGui.QWidget):       # Screen to display data

    def __init__(self, parent=None):
        QtGui.QWidget.__init__(self, parent)

        # layout for check box container widget
        chkBoxLayout = QtGui.QVBoxLayout(self)
        # create list of checkboxes
        self.checkboxes = []
        numofCheckboxes = 30
        for x in range(numofCheckboxes):
            self.checkboxes.append(QtGui.QCheckBox('test'))
        # add checkboxes to chkBoxLayout
        for i, chkbox in enumerate(self.checkboxes):
            chkbox.setChecked(True)
            chkBoxLayout.addWidget(chkbox)
        chkBoxLayout.addStretch(1) 
        chkBoxLayout.setMargin(0);
        chkBoxLayout.setContentsMargins(0,0,0,0)
        chkBoxLayout.setSpacing(0) 

        # checkbox container widget       
        widget = QtGui.QWidget()  
        widget.setStyleSheet(""".QWidget {background-color: rgb(255, 255, 255);}""")
        widget.setLayout(chkBoxLayout)

        # checkbox scroll area, gives scrollable view on widget
        scroll = QtGui.QScrollArea()
        scroll.setMinimumWidth(120)
        scroll.setMinimumHeight(200) # would be better if resizable
        scroll.setWidgetResizable(True)
        scroll.setVerticalScrollBarPolicy(QtCore.Qt.ScrollBarAsNeeded)
        scroll.setHorizontalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff)         
        scroll.setWidget(widget)   

        self.samplePanel = QtGui.QVBoxLayout()
        self.samplePanel.addWidget(scroll)
        self.samplePanel.addStretch(1)  

        # horizontal layout
        hbox = QtGui.QHBoxLayout()
        hbox.addLayout(self.samplePanel)
        hbox.addStretch(1)
        self.setLayout(hbox)
        self.resize(100, 500)

if __name__ == "__main__":
    import sys
    app = QtGui.QApplication(sys.argv)
    Screen = Screen3()
    Screen.show()
    sys.exit(app.exec_())

Answer 1

您必须将 QScrollArea 添加到主布局中，您不需要创建其他布局。

class Screen3(QtGui.QWidget):       # Screen to display data
    def __init__(self, parent=None):
        QtGui.QWidget.__init__(self, parent)

        # layout for check box container widget
        chkBoxLayout = QtGui.QVBoxLayout()
        # create list of checkboxes
        self.checkboxes = []
        numofCheckboxes = 30
        for x in range(numofCheckboxes):
            self.checkboxes.append(QtGui.QCheckBox('test'))
        # add checkboxes to chkBoxLayout
        for i, chkbox in enumerate(self.checkboxes):
            chkbox.setChecked(True)
            chkBoxLayout.addWidget(chkbox)
        chkBoxLayout.addStretch(1) 
        chkBoxLayout.setMargin(0);
        chkBoxLayout.setContentsMargins(0,0,0,0)
        chkBoxLayout.setSpacing(0) 

        # checkbox container widget       
        widget = QtGui.QWidget()  
        widget.setStyleSheet(""".QWidget {background-color: rgb(255, 255, 255);}""")
        widget.setLayout(chkBoxLayout)

        # checkbox scroll area, gives scrollable view on widget
        scroll = QtGui.QScrollArea()
        scroll.setMinimumWidth(120)
        scroll.setMinimumHeight(200) # would be better if resizable
        scroll.setWidgetResizable(True)
        scroll.setVerticalScrollBarPolicy(QtCore.Qt.ScrollBarAsNeeded)
        scroll.setHorizontalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff)         
        scroll.setWidget(widget)  

        lay = QtGui.QVBoxLayout(self)
        lay.addWidget(scroll)

自动调整 QScrollArea 的大小

Automatic resize QScrollArea

python

pyqt

pyqt4

qscrollarea