自定义IndexWidget在QListView中的平滑延迟加载和卸载开发者社区

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import sys
from PyQt4 import QtGui, QtCore
from PyQt4.QtCore import Qt
class TestListModel(QtCore.QAbstractListModel):
    def __init__(self, parent=None):
        QtCore.QAbstractListModel.__init__(self, parent)
        self.list = parent
    def rowCount(self, index):
        return 1000
    def data(self, index, role):
        if role == Qt.DisplayRole:
            if not self.list.indexWidget(index):
                button = QtGui.QPushButton("This is item #%s" % index.row())
                self.list.setIndexWidget(index, button)
            return QtCore.QVariant()
        if role == Qt.SizeHintRole:
            return QtCore.QSize(100, 50)
    def columnCount(self, index):
def main():
    app = QtGui.QApplication(sys.argv)
    window = QtGui.QWidget()
    list = QtGui.QListView()
    model = TestListModel(list)
    list.setModel(model)
    list.setVerticalScrollMode(QtGui.QAbstractItemView.ScrollPerPixel)
    layout = QtGui.QVBoxLayout(window)
    layout.addWidget(list)
    window.setLayout(layout)
    window.show()
    sys.exit(app.exec_())
if __name__ == '__main__':
    main()

button = QtGui.QPushButton("This is item #%s" % index.row())
self.list.setIndexWidget(index, button)
button.setVisible(False)

while xCondition:
   if self.model.canFetchMore():
      self.model.fetchMore()

class MyItemDelegate(QtGui.QItemDelegate):
    def __init__(self, parent=None):
        super(MyItemDelegate, self).__init__(parent)
    def paint(self, painter, option, index):
        text = index.model().data(index, QtCore.Qt.DisplayRole).toString()
        pushButton = QtGui.QPushButton()
        pushButton.setText(text)
        pushButton.setGeometry(option.rect)

问 自定义IndexWidget在QListView中的平滑延迟加载和卸载

回答 2

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Stack Overflow用户