03-QSlider-鼠标跳转优化.py

"""
Created on 2018年11月5日
@author: Irony
@site: https://pyqt5.com , https://github.com/892768447
@email: 892768447@qq.com
@file: ClickJumpSlider
@description:
"""
from PyQt5.QtCore import Qt
from PyQt5.QtWidgets import (QFormLayout, QLabel, QSlider, QStyle,
                             QStyleOptionSlider, QWidget)

__Author__ = """By: Irony
QQ: 892768447
Email: 892768447@qq.com"""
__Copyright__ = "Copyright (c) 2018 Irony"
__Version__ = "Version 1.0"


class ClickJumpSlider(QSlider):
    def mousePressEvent(self, event):
        # 获取上面的拉动块位置
        option = QStyleOptionSlider()
        self.initStyleOption(option)
        rect = self.style().subControlRect(
            QStyle.CC_Slider, option, QStyle.SC_SliderHandle, self
        )
        if rect.contains(event.pos()):
            # 如果鼠标点击的位置在滑块上则交给Qt自行处理
            super(ClickJumpSlider, self).mousePressEvent(event)
            return
        if self.orientation() == Qt.Horizontal:
            # 横向，要考虑invertedAppearance是否反向显示的问题
            self.setValue(
                self.style().sliderValueFromPosition(
                    self.minimum(),
                    self.maximum(),
                    event.x()
                    if not self.invertedAppearance()
                    else (self.width() - event.x()),
                    self.width(),
                )
            )
        else:
            # 纵向
            self.setValue(
                self.style().sliderValueFromPosition(
                    self.minimum(),
                    self.maximum(),
                    (self.height() - event.y())
                    if not self.invertedAppearance()
                    else event.y(),
                    self.height(),
                )
            )


class DemoWindow(QWidget):
    def __init__(self, *args, **kwargs):
        super(DemoWindow, self).__init__(*args, **kwargs)
        self.resize(600, 600)
        layout = QFormLayout(self)

        self.label1 = QLabel("0", self)
        layout.addRow(
            self.label1,
            ClickJumpSlider(
                Qt.Horizontal, valueChanged=lambda v: self.label1.setText(str(v))
            ),
        )

        # 横向-反向显示
        self.label2 = QLabel("0", self)
        layout.addRow(
            self.label2,
            ClickJumpSlider(
                Qt.Horizontal,
                invertedAppearance=True,
                valueChanged=lambda v: self.label2.setText(str(v)),
            ),
        )

        self.label3 = QLabel("0", self)
        layout.addRow(
            self.label3,
            ClickJumpSlider(
                Qt.Vertical,
                minimumHeight=200,
                valueChanged=lambda v: self.label3.setText(str(v)),
            ),
        )

        # 纵向反向显示
        self.label4 = QLabel("0", self)
        layout.addRow(
            self.label4,
            ClickJumpSlider(
                Qt.Vertical,
                invertedAppearance=True,
                minimumHeight=200,
                valueChanged=lambda v: self.label4.setText(str(v)),
            ),
        )


if __name__ == "__main__":
    import cgitb
    import sys

    cgitb.enable(1, None, 5, "")
    from PyQt5.QtWidgets import QApplication

    app = QApplication(sys.argv)
    w = DemoWindow()
    w.show()
    sys.exit(app.exec_())