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65 lines
2.5 KiB
Python
65 lines
2.5 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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QAbstractScrollArea 滚动条显示策略
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滚动条显示策略由 Qt.ScrollBarPolicy 列出，具体如下：
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https://doc.qt.io/qt-6/qt.html#ScrollBarPolicy-enum
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Qt.ScrollBarAsNeeded 只有当内容太大而无法容纳时，QAbstractScrollArea 才显示滚动条。此为默认值
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Qt.ScrollBarAlwaysOff QAbstractScrollArea 永不显示滚动条
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Qt.ScrollBarAlwaysOn QAbstractScrollArea 总显示一个滚动条。此属性在具有瞬态滚动条的操作系统上被忽略
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即使不显示滚动条，也仍可通过键盘方向键、鼠标滚轮等控制滚动区域滚动
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.setHorizontalScrollBarPolicy(Qt.ScrollBarPolicy) 设置水平滚动条策略
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.setVerticalScrollBarPolicy(Qt.ScrollBarPolicy) 设置垂直滚动条策略
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.horizontalScrollBarPolicy() -> Qt.ScrollBarPolicy 获取水平滚动条策略
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.verticalScrollBarPolicy() -> Qt.ScrollBarPolicy 获取垂直滚动条策略
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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("空白测试模板")
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self.resize(800, 600)
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self.setup_ui()
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self.test_01()
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def setup_ui(self) -> None:
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"""设置界面"""
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self.pte = QtWidgets.QPlainTextEdit(self)
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self.pte.resize(400, 250)
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button_1 = QtWidgets.QPushButton("增加文本", self)
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button_1.move(500, 80)
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@QtCore.Slot()
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def append_text():
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"""按钮的槽函数，用于为文本编辑器添加行"""
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self.pte.appendPlainText("PySide6\nPySide6")
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# 逐渐增加文本至编辑器无法全面显示时，体现滚动条策略的效果
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button_1.clicked.connect(append_text) # type: ignore
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def test_01(self) -> None:
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"""测试滚动条显示策略"""
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# 水平滚动条效果与垂直滚动条相仿，这里仅演示垂直滚动条
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# 设置滚动条显示策略
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# self.pte.setVerticalScrollBarPolicy(Qt.ScrollBarAsNeeded) # 默认值，仅在需要时显示滚动条
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# self.pte.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff) # 任何情况都不显示滚动条
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self.pte.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOn) # 始终显示滚动条
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print(self.pte.verticalScrollBarPolicy()) # 获取垂直滚动条策略
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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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