QTreeWidgetItems 和 QLineEdit 回声模式

QTreeWidgetItems and QLineEdit echomodes

重点:如何让 QTreeWidgetItem 遵守 QLineEdits setEchoMode(QLineEdit.Password)?

最后一天我一直在用头撞墙: 我有一个 QTreeWidgetItem 的子 class(它只是向 class 添加了一个额外的字段)

我创建了它的一个实例,将它添加到我的 TreeWidget 中:

    twi = DIMTreeWidgetItem.DIMTreeWidgetItem(uuid.uuid4(), [field_name, '<Empty>'])
    ...
    self.ui_instance.main_window.treeWidget.addTopLevelItem(twi)

我根据双击该项目编辑了一个实例:

self.ui_instance.main_window.treeWidget.editItem(项目,列) 这很好用。

我有一个代表附加到该列,它很简单:

def __init__(self, parent=None, *args):
    QStyledItemDelegate.__init__(self, parent, *args)

def createEditor(self, parent, option, index):        
    le = QLineEdit('', parent)
    le.setEchoMode(QLineEdit.PasswordEchoOnEdit)
    return le

但这似乎只影响编辑期间的项目。我在编辑后隐藏treewidgetitem内容的正确方法是什么?

即使有人可以阐明如何在 C++ 中执行此操作,我也确信我可以将其转换为 pyside2

您必须将委托的 displayText 方法覆盖为 return 文本长度的 字符:

from PySide2 import QtCore, QtWidgets

class PasswordDelegate(QtWidgets.QStyledItemDelegate):
    def createEditor(self, parent, option, index): 
        editor = QtWidgets.QLineEdit(parent)
        editor.setEchoMode(QtWidgets.QLineEdit.PasswordEchoOnEdit)
        return editor

    def displayText(self, value, locale):
        character = "●" # u"\u25CF"
        v = character * len(value)
        return super(PasswordDelegate, self).displayText(v, locale)

class EditableItem(QtWidgets.QTreeWidgetItem):
    def __init__(self, *args, **kwargs):
        super(EditableItem, self).__init__(*args, **kwargs)
        self.setFlags(self.flags() | QtCore.Qt.ItemIsEditable)

class MainWindow(QtWidgets.QMainWindow):
    def __init__(self, parent=None):
        super(MainWindow, self).__init__(parent)
        tree_widget = QtWidgets.QTreeWidget()
        self.setCentralWidget(tree_widget)

        for i in range(5):
            parent_item = EditableItem(tree_widget, ["{}".format(i)])
            for j in range(5):
                child_item = EditableItem(["{}-{}".format(i, j)])
                parent_item.addChild(child_item)
        tree_widget.expandAll()

        delegate = PasswordDelegate(tree_widget)
        tree_widget.setItemDelegate(delegate)

if __name__ == '__main__':
    import sys
    app = QtWidgets.QApplication(sys.argv)
    w = MainWindow()
    w.resize(640, 480)
    w.show()
    sys.exit(app.exec_())

如果您想区分在哪个元素中应用,您可以覆盖 initStyleOption 方法,因为它具有与该项目关联的 QModelIndex 信息,在以下示例中,它将仅应用于具有父元素的元素。

class PasswordDelegate(QtWidgets.QStyledItemDelegate):
    def createEditor(self, parent, option, index): 
        editor = QtWidgets.QLineEdit(parent)
        editor.setEchoMode(QtWidgets.QLineEdit.PasswordEchoOnEdit)
        return editor

    def initStyleOption(self, option, index):
        super(PasswordDelegate, self).initStyleOption(option, index)
        if index.parent().isValid():
            character = "●" # u"\u25CF"
            option.text = character * len(option.text)