将多个尾随 qaction 添加到 lineedit

Question

我正在尝试为文本搜索和过滤完成 lineEdit，类似于 vscode 等应用程序中的那些：

Qt 的 lineedit 有一个“内置”清除按钮操作，类似于我正在寻找的操作。我查看了 qlineedits c++ 源代码并构建了一个修改后的函数，该函数添加了自定义清除操作。是否可以将多个尾随操作彼此相邻添加到类似于上面引用的示例的 lineedit？

class ULineEdit(QtWidgets.QLineEdit):
    def __init__(self,
            defaultText: str = "",
            isReadOnly: bool = False,
            isClearButtonEnabled: bool = True,
            parent=None
            ):

        super(ULineEdit, self).__init__()
        self.setText(defaultText)
        self.setReadOnly(isReadOnly)

        self.setClearButtonEnabled(isClearButtonEnabled)

        self.setSizePolicy(QtWidgets.QSizePolicy.MinimumExpanding, QtWidgets.QSizePolicy.Fixed)

    # override When readOnly is set to QLineEdit it disables QToolButton (clear button)
    def setClearButtonEnabled(self, enable: bool = True):
        if enable == True:
            clearAction = UAction.UClearAction(parent=self)
            clearAction.triggered.connect(self.clear)
            self.textChanged.connect(clearAction.dynamicVisibility)
            self.addAction(clearAction, QtWidgets.QLineEdit.TrailingPosition)
            # default state
            clearAction.dynamicVisibility(self.text())
        else:
            clearAction = UAction.getClearAction(self)
            if clearAction is not None:
                self.removeAction(clearAction)

Answer 1

你必须使用QLineEdit的addAction()方法：

from PyQt5 import QtWidgets


class ULineEdit(QtWidgets.QLineEdit):
    def __init__(
        self,
        defaultText: str = "",
        isReadOnly: bool = False,
        isClearButtonEnabled: bool = True,
        parent=None,
    ):

        super(ULineEdit, self).__init__()
        self.setText(defaultText)
        self.setReadOnly(isReadOnly)

        self.setClearButtonEnabled(isClearButtonEnabled)

        self.setSizePolicy(
            QtWidgets.QSizePolicy.MinimumExpanding, QtWidgets.QSizePolicy.Fixed
        )

        foo_action = QtWidgets.QAction(self)
        icon = self.style().standardIcon(QtWidgets.QStyle.SP_DesktopIcon)
        foo_action.setIcon(icon)
        self.addAction(foo_action, QtWidgets.QLineEdit.TrailingPosition)

        bar_action = QtWidgets.QAction(self)
        icon = self.style().standardIcon(QtWidgets.QStyle.SP_DirIcon)
        bar_action.setIcon(icon)
        self.addAction(bar_action, QtWidgets.QLineEdit.TrailingPosition)


def main():
    app = QtWidgets.QApplication([])
    w = ULineEdit()
    w.show()
    app.exec_()


if __name__ == "__main__":
    main()