import sys from PySide6 import QtCore, QtWidgets from PySide6.QtCore import Qt """ QLineEdit 光标相关 .cursorForward(mark: bool, steps: int = 1) 将光标向前移动steps更个字符 .cursorBackward(mark: bool, steps: int = 1) 将光标向后移动steps个字符 .cursorWordForward(mark: bool) 将光标向前移动一个单词 .cursorWordBackward(mark: bool) 将光标向后移动一个单词 以上四种方法，若mark参数为True,则光标移动时将把经过的范围加入选中， 若为False则清除选中 .setCursorPosition(int) 设置光标位置 .cursorPosition() -> int 获取光标位置 .cursorPositionAt(pos: QPoint) -> int 返回在pos位置(二维坐标)的光标位置(行编辑器内的位置) .setCursorMoveStyle(Qt.CursorMoveStyle) 设置光标移动方式，Qt.CursorMoveStyle详情见下文 .cursorMoveStyle() -> Qt.CursorMoveStyle 返回光标移动方式 Qt.CursorMoveStyle枚举值具体有如下两种值： https://doc.qt.io/qt-6/qt.html#CursorMoveStyle-enum 逻辑风格中，键盘左箭头意味着光标向文本的前方移动（对于从右至左的文本，前方意味着右方）； 而视觉风格中，键盘左箭头意味着光标向视觉上的左侧移动，而不考虑文本书写方向。 Qt.LogicalMoveStyle 逻辑风格 Qt.VisualMoveStyle 视觉风格 """ class MyWidget(QtWidgets.QWidget): def __init__(self, *args, **kwargs): super().__init__(*args, **kwargs) self.setWindowTitle("QLineEdit-光标") self.resize(600, 400) self.setup_ui() self.test_cursor() def setup_ui(self) -> None: """设置界面""" # 主要测试对象：line_edit self.line_edit = QtWidgets.QLineEdit() # ================ 移动光标 ======================= move_groupbox = QtWidgets.QGroupBox("移动光标") self.move_step_length_checkbox = QtWidgets.QCheckBox("以单词为单位移动") self.move_flag_checkbox = QtWidgets.QCheckBox("移动时选中文本") self.cursor_forward_button = QtWidgets.QPushButton("向前移动") self.cursor_backward_button = QtWidgets.QPushButton("向后移动") move_layout = QtWidgets.QVBoxLayout() move_layout.addWidget(self.move_step_length_checkbox) move_layout.addWidget(self.move_flag_checkbox) move_layout.addWidget(self.cursor_forward_button) move_layout.addWidget(self.cursor_backward_button) move_groupbox.setLayout(move_layout) # ================ 光标位置 ======================= pos_groupbox = QtWidgets.QGroupBox("光标位置") self.pos_line_edit = QtWidgets.QLineEdit() self.pos_line_edit.setReadOnly(True) self.set_pos_spinbox = QtWidgets.QSpinBox() self.set_pos_spinbox.setRange(0, 200) self.pos_at_label = QtWidgets.QLabel() self.point = QtCore.QPoint(80, 20) pos_layout = QtWidgets.QFormLayout() pos_layout.addRow(QtWidgets.QLabel("光标当前位于："), self.pos_line_edit) pos_layout.addRow(QtWidgets.QLabel("将光标设置到："), self.set_pos_spinbox) pos_layout.addRow(QtWidgets.QLabel(f"{self.point.toTuple()}处的光标位于"), self.pos_at_label) pos_groupbox.setLayout(pos_layout) # ================ 光标移动风格 ======================= move_style_groupbox = QtWidgets.QGroupBox("光标移动风格") self.toward_switch_checkbox = QtWidgets.QCheckBox("切换文本方向") self.logical_move_radio = QtWidgets.QRadioButton("逻辑移动风格") self.visual_move_radio = QtWidgets.QRadioButton("视觉移动风格") move_style_layout = QtWidgets.QVBoxLayout() move_style_layout.addWidget(self.toward_switch_checkbox) move_style_layout.addWidget(self.logical_move_radio) move_style_layout.addWidget(self.visual_move_radio) move_style_groupbox.setLayout(move_style_layout) # ================ 总布局 ======================= bottom_layout = QtWidgets.QHBoxLayout() bottom_layout.addWidget(move_groupbox) bottom_layout.addWidget(pos_groupbox) bottom_layout.addWidget(move_style_groupbox) main_layout = QtWidgets.QVBoxLayout() main_layout.addWidget(self.line_edit) main_layout.addLayout(bottom_layout) self.setLayout(main_layout) def test_cursor(self): """测试光标相关功能""" # ================ 移动光标 ======================= @QtCore.Slot() def cursor_move_forward(): """以指定的方式向前移动光标""" mark = self.move_flag_checkbox.isChecked() if self.move_step_length_checkbox.isChecked(): self.line_edit.cursorWordForward(mark) else: self.line_edit.cursorForward(mark) self.line_edit.setFocus() @QtCore.Slot() def cursor_move_backward(): """以指定的方式向后移动光标""" mark = self.move_flag_checkbox.isChecked() if self.move_step_length_checkbox.isChecked(): self.line_edit.cursorWordBackward(mark) else: self.line_edit.cursorBackward(mark) self.line_edit.setFocus() # 连接信号与槽 self.cursor_forward_button.clicked.connect(cursor_move_forward) # type: ignore self.cursor_backward_button.clicked.connect(cursor_move_backward) # type: ignore # ================ 光标位置 ======================= @QtCore.Slot() def show_cursor_pos(): """在pos_line_edit中展示当前line_edit中光标的位置""" self.pos_line_edit.setText(str(self.line_edit.cursorPosition())) @QtCore.Slot(int) def move_cursor_pos(pos): """将line_edit的光标设置为set_pos_spinbox中的数值""" self.line_edit.setCursorPosition(pos) self.line_edit.setFocus() @QtCore.Slot() def update_pos_at_label(): self.pos_at_label.setText(f"{self.line_edit.cursorPositionAt(self.point)}") # 连接信号与槽 self.line_edit.cursorPositionChanged.connect(show_cursor_pos) # type: ignore self.set_pos_spinbox.valueChanged[int].connect(move_cursor_pos) # type: ignore self.line_edit.cursorPositionChanged.connect(update_pos_at_label) # type: ignore # ================ 光标移动风格 ======================= # 目前通过指定setLayoutDirection的方法改变单行编辑器中文本方向的方式已不再可用 @QtCore.Slot(bool) def change_toward(yes: bool): """改变单行编辑器中文本方向""" if yes: self.line_edit.setLayoutDirection(Qt.RightToLeft) self.line_edit.setText("مرحبا بالعالم.") else: self.line_edit.setLayoutDirection(Qt.LeftToRight) self.line_edit.setText("Hello world.") self.line_edit.setFocus() @QtCore.Slot() def set_logical_move(): """将光标移动方式设置为逻辑风格""" self.line_edit.setCursorMoveStyle(Qt.LogicalMoveStyle) self.line_edit.setFocus() @QtCore.Slot() def set_visual_move(): """将光标移动方式设置为视觉风格""" self.line_edit.setCursorMoveStyle(Qt.VisualMoveStyle) self.line_edit.setFocus() # 连接信号与槽 self.toward_switch_checkbox.toggled[bool].connect(change_toward) # type: ignore self.logical_move_radio.clicked.connect(set_logical_move) # type: ignore self.visual_move_radio.clicked.connect(set_visual_move) # type: ignore if __name__ == "__main__": app = QtWidgets.QApplication(sys.argv) window = MyWidget() window.show() sys.exit(app.exec())