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https://github.com/muziing/PySide6-Code-Tutorial.git
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188 lines
7.9 KiB
Python
188 lines
7.9 KiB
Python
import sys
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from PySide6 import QtCore, QtWidgets
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from PySide6.QtCore import Qt
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"""
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QLineEdit 光标相关
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.cursorForward(mark: bool, steps: int = 1) 将光标向前移动steps更个字符
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.cursorBackward(mark: bool, steps: int = 1) 将光标向后移动steps个字符
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.cursorWordForward(mark: bool) 将光标向前移动一个单词
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.cursorWordBackward(mark: bool) 将光标向后移动一个单词
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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，
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若为False则清除选中
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.setCursorPosition(int) 设置光标位置
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.cursorPosition() -> int 获取光标位置
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.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)
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.setCursorMoveStyle(Qt.CursorMoveStyle) 设置光标移动方式，Qt.CursorMoveStyle详情见下文
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.cursorMoveStyle() -> Qt.CursorMoveStyle 返回光标移动方式
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Qt.CursorMoveStyle枚举值具体有如下两种值：
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https://doc.qt.io/qt-6/qt.html#CursorMoveStyle-enum
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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）；
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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。
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Qt.LogicalMoveStyle 逻辑风格
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Qt.VisualMoveStyle 视觉风格
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"""
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class MyWidget(QtWidgets.QWidget):
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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self.setWindowTitle("QLineEdit-光标")
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self.resize(600, 400)
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self.setup_ui()
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self.test_cursor()
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def setup_ui(self) -> None:
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"""设置界面"""
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# 主要测试对象：line_edit
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self.line_edit = QtWidgets.QLineEdit()
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# ================ 移动光标 =======================
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move_groupbox = QtWidgets.QGroupBox("移动光标")
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self.move_step_length_checkbox = QtWidgets.QCheckBox("以单词为单位移动")
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self.move_flag_checkbox = QtWidgets.QCheckBox("移动时选中文本")
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self.cursor_forward_button = QtWidgets.QPushButton("向前移动")
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self.cursor_backward_button = QtWidgets.QPushButton("向后移动")
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move_layout = QtWidgets.QVBoxLayout()
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move_layout.addWidget(self.move_step_length_checkbox)
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move_layout.addWidget(self.move_flag_checkbox)
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move_layout.addWidget(self.cursor_forward_button)
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move_layout.addWidget(self.cursor_backward_button)
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move_groupbox.setLayout(move_layout)
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# ================ 光标位置 =======================
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pos_groupbox = QtWidgets.QGroupBox("光标位置")
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self.pos_line_edit = QtWidgets.QLineEdit()
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self.pos_line_edit.setReadOnly(True)
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self.set_pos_spinbox = QtWidgets.QSpinBox()
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self.set_pos_spinbox.setRange(0, 200)
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self.pos_at_label = QtWidgets.QLabel()
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self.point = QtCore.QPoint(80, 20)
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pos_layout = QtWidgets.QFormLayout()
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pos_layout.addRow(QtWidgets.QLabel("光标当前位于："), self.pos_line_edit)
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pos_layout.addRow(QtWidgets.QLabel("将光标设置到："), self.set_pos_spinbox)
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pos_layout.addRow(QtWidgets.QLabel(f"{self.point.toTuple()}处的光标位于"), self.pos_at_label)
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pos_groupbox.setLayout(pos_layout)
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# ================ 光标移动风格 =======================
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move_style_groupbox = QtWidgets.QGroupBox("光标移动风格")
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self.toward_switch_checkbox = QtWidgets.QCheckBox("切换文本方向")
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self.logical_move_radio = QtWidgets.QRadioButton("逻辑移动风格")
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self.visual_move_radio = QtWidgets.QRadioButton("视觉移动风格")
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move_style_layout = QtWidgets.QVBoxLayout()
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move_style_layout.addWidget(self.toward_switch_checkbox)
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move_style_layout.addWidget(self.logical_move_radio)
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move_style_layout.addWidget(self.visual_move_radio)
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move_style_groupbox.setLayout(move_style_layout)
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# ================ 总布局 =======================
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bottom_layout = QtWidgets.QHBoxLayout()
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bottom_layout.addWidget(move_groupbox)
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bottom_layout.addWidget(pos_groupbox)
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bottom_layout.addWidget(move_style_groupbox)
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main_layout = QtWidgets.QVBoxLayout()
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main_layout.addWidget(self.line_edit)
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main_layout.addLayout(bottom_layout)
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self.setLayout(main_layout)
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def test_cursor(self):
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"""测试光标相关功能"""
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# ================ 移动光标 =======================
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@QtCore.Slot()
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def cursor_move_forward():
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"""以指定的方式向前移动光标"""
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mark = self.move_flag_checkbox.isChecked()
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if self.move_step_length_checkbox.isChecked():
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self.line_edit.cursorWordForward(mark)
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else:
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self.line_edit.cursorForward(mark)
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self.line_edit.setFocus()
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@QtCore.Slot()
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def cursor_move_backward():
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"""以指定的方式向后移动光标"""
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mark = self.move_flag_checkbox.isChecked()
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if self.move_step_length_checkbox.isChecked():
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self.line_edit.cursorWordBackward(mark)
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else:
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self.line_edit.cursorBackward(mark)
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self.line_edit.setFocus()
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# 连接信号与槽
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self.cursor_forward_button.clicked.connect(cursor_move_forward) # type: ignore
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self.cursor_backward_button.clicked.connect(cursor_move_backward) # type: ignore
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# ================ 光标位置 =======================
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@QtCore.Slot()
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def show_cursor_pos():
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"""在pos_line_edit中展示当前line_edit中光标的位置"""
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self.pos_line_edit.setText(str(self.line_edit.cursorPosition()))
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@QtCore.Slot(int)
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def move_cursor_pos(pos):
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"""将line_edit的光标设置为set_pos_spinbox中的数值"""
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self.line_edit.setCursorPosition(pos)
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self.line_edit.setFocus()
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@QtCore.Slot()
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def update_pos_at_label():
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self.pos_at_label.setText(f"{self.line_edit.cursorPositionAt(self.point)}")
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# 连接信号与槽
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self.line_edit.cursorPositionChanged.connect(show_cursor_pos) # type: ignore
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self.set_pos_spinbox.valueChanged[int].connect(move_cursor_pos) # type: ignore
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self.line_edit.cursorPositionChanged.connect(update_pos_at_label) # type: ignore
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# ================ 光标移动风格 =======================
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# 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
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@QtCore.Slot(bool)
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def change_toward(yes: bool):
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"""改变单行编辑器中文本方向"""
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if yes:
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self.line_edit.setLayoutDirection(Qt.RightToLeft)
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self.line_edit.setText("مرحبا بالعالم.")
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else:
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self.line_edit.setLayoutDirection(Qt.LeftToRight)
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self.line_edit.setText("Hello world.")
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self.line_edit.setFocus()
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@QtCore.Slot()
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def set_logical_move():
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"""将光标移动方式设置为逻辑风格"""
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self.line_edit.setCursorMoveStyle(Qt.LogicalMoveStyle)
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self.line_edit.setFocus()
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@QtCore.Slot()
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def set_visual_move():
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"""将光标移动方式设置为视觉风格"""
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self.line_edit.setCursorMoveStyle(Qt.VisualMoveStyle)
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self.line_edit.setFocus()
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# 连接信号与槽
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self.toward_switch_checkbox.toggled[bool].connect(change_toward) # type: ignore
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self.logical_move_radio.clicked.connect(set_logical_move) # type: ignore
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self.visual_move_radio.clicked.connect(set_visual_move) # type: ignore
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if __name__ == "__main__":
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app = QtWidgets.QApplication(sys.argv)
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window = MyWidget()
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window.show()
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sys.exit(app.exec())
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