如何在pyqt中创建一个scrollarea

How to create one scrollarea in pyqt

我正在开发一个高度为300的滚动区Widget,在滚动区添加QLabel Widgets,每个QLabel高度为100。添加2个以上QLabel时,滚动区QLabel重叠,滚动bar does not 说明我没有办法拉动滚动条。我想将 QLabel 彼此分开。同时我可以下拉滚动条看到剩余的QLabel

from PyQt4 import QtCore
from PyQt4.QtGui import QScrollArea, QLabel, QVBoxLayout
import sys
from PyQt4 import QtGui


class ScrollArea(QScrollArea):
    def __init__(self):
        super(ScrollArea, self).__init__()
        self.setFixedSize(500, 300)
        self.setHorizontalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff)
        self.setVerticalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOn)

        vbox = QVBoxLayout()
        self.setLayout(vbox)
        for i in range(4):
            lb = QLabel('hjkmlasda')
            lb.setStyleSheet("""
              border-width: 1px;
             border-style: solid;
             border-color:blue;
            """)
            lb.setFixedSize(400, 100)
            vbox.addWidget(lb)
            vbox.addStretch(1)


class Example(QtGui.QWidget):

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

        self.initUI()

    def initUI(self):
        h = QtGui.QHBoxLayout()
        h.addWidget(ScrollArea())
        self.setLayout(h)

        self.setGeometry(100, 100, 1000, 500)
        self.show()


def main():
    app = QtGui.QApplication(sys.argv)
    ex = Example()
    sys.exit(app.exec_())


if __name__ == '__main__':
    main()

在QScrollArea中不用设置布局而是设置一个widget,那么如何放多个widget呢?那么,您必须使用 QWidget 作为容器并通过分配给容器的布局来设置小部件,同时启用 widgetResizable 属性:

class ScrollArea(QtGui.QScrollArea):
    def __init__(self, parent=None):
        super(ScrollArea, self).__init__(parent)
        self.setFixedSize(500, 300)
        self.setHorizontalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff)
        self.setVerticalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOn)
        self.setWidgetResizable(True)

        container = QtGui.QWidget()
        self.setWidget(container)
        vbox = QtGui.QVBoxLayout(container)
        # vbox.setSpacing(0)
        for i in range(4):
            lb = QtGui.QLabel("hjkmlasda")
            lb.setStyleSheet(
                """
                border-width: 1px;
                border-style: solid;
                border-color:blue;
            """
            )
            lb.setFixedSize(400, 100)
            vbox.addWidget(lb)

您应该为 QScrollArea 设置一个可调整大小的小部件并将布局放置在该小部件上。编辑构造函数:

class ScrollArea(QScrollArea):
    def __init__(self):
        super(ScrollArea, self).__init__()

        w = QWidget()
        self.setWidget(w)
        self.setWidgetResizable(True)

        self.setFixedSize(500, 300)
        self.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
        self.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOn)

        vbox = QVBoxLayout(w)
        . . .