美しいミズキ

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from PySide6.QtWidgets import QWidget
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class TitleBar(QWidget):
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    def __init__(self):
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        super().__init__()

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import sys
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from PySide6.QtWidgets import QApplication, QWidget, QVBoxLayout, QHBoxLayout
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from PySide6.QtGui import QColor, QPainter
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from PySide6.QtCore import Qt
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class Window(QWidget):
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    def __init__(self):
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        super().__init__()
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        # 设置无边框
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        self.setWindowFlags(Qt.WindowType.FramelessWindowHint)
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        # 透明背景
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        self.setAttribute(Qt.WidgetAttribute.WA_TranslucentBackground)
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        # 弹出的无框窗口
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        self.setWindowFlags(
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            Qt.WindowType.FramelessWindowHint |
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            Qt.WindowType.Popup |
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            Qt.WindowType.NoDropShadowWindowHint # 不加边框会有阴影
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        )
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    def paintEvent(self, event):
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        """ 自定义绘制背景 """
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        painter = QPainter(self)
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        painter.setPen(Qt.NoPen)
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        painter.setBrush(QColor(245, 245, 245))
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        painter.drawRoundedRect(self.rect(), 8, 8)