PyQt5无边框窗口的标题拖动和窗口缩放实现

xiaoxiao2021-02-28  12

网上找了半天都找不到好用的PyQt5无边框窗口的实现 借鉴部分前辈的窗口拖放代码 自己捣鼓了一下,实现了一下无边框窗口,问题可能还有一点,慢慢改吧 先做个笔记

py文件

#!/usr/bin/env python #-*- coding:utf-8 -*- from PyQt5.QtWidgets import QWidget, QLabel, QPushButton, QVBoxLayout from PyQt5.QtCore import Qt, QPoint from PyQt5.QtGui import QFont, QCursor class QTitleLabel(QLabel): """ 新建标题栏标签类 """ def __init__(self, *args): super(QTitleLabel, self).__init__(*args) self.setAlignment(Qt.AlignLeft | Qt.AlignVCenter) self.setFixedHeight(30) class QTitleButton(QPushButton): """ 新建标题栏按钮类 """ def __init__(self, *args): super(QTitleButton, self).__init__(*args) self.setFont(QFont("Webdings")) # 特殊字体以不借助图片实现最小化最大化和关闭按钮 self.setFixedWidth(40) class QUnFrameWindow(QWidget): """ 无边框窗口类 """ def __init__(self): super(QUnFrameWindow, self).__init__(None, Qt.FramelessWindowHint) # 设置为顶级窗口,无边框 self._padding = 5 # 设置边界宽度为5 self.initTitleLabel() # 安放标题栏标签 self.setWindowTitle = self._setTitleText(self.setWindowTitle) # 用装饰器将设置WindowTitle名字函数共享到标题栏标签上 self.setWindowTitle("UnFrameWindow") self.initLayout() # 设置框架布局 self.setMinimumWidth(250) self.setMouseTracking(True) # 设置widget鼠标跟踪 self.initDrag() # 设置鼠标跟踪判断默认值 def initDrag(self): # 设置鼠标跟踪判断扳机默认值 self._move_drag = False self._corner_drag = False self._bottom_drag = False self._right_drag = False def initTitleLabel(self): # 安放标题栏标签 self._TitleLabel = QTitleLabel(self) self._TitleLabel.setMouseTracking(True) # 设置标题栏标签鼠标跟踪(如不设,则标题栏内在widget上层,无法实现跟踪) self._TitleLabel.setIndent(10) # 设置标题栏文本缩进 self._TitleLabel.move(0, 0) # 标题栏安放到左上角 def initLayout(self): # 设置框架布局 self._MainLayout = QVBoxLayout() self._MainLayout.setSpacing(0) self._MainLayout.addWidget(QLabel(), Qt.AlignLeft) # 顶一个QLabel在竖放框架第一行,以免正常内容挤占到标题范围里 self._MainLayout.addStretch() self.setLayout(self._MainLayout) def addLayout(self, QLayout): # 给widget定义一个addLayout函数,以实现往竖放框架的正确内容区内嵌套Layout框架 self._MainLayout.addLayout(QLayout) def _setTitleText(self, func): # 设置标题栏标签的装饰器函数 def wrapper(*args): self._TitleLabel.setText(*args) return func(*args) return wrapper def setTitleAlignment(self, alignment): # 给widget定义一个setTitleAlignment函数,以实现标题栏标签的对齐方式设定 self._TitleLabel.setAlignment(alignment | Qt.AlignVCenter) def setCloseButton(self, bool): # 给widget定义一个setCloseButton函数,为True时设置一个关闭按钮 if bool == True: self._CloseButton = QTitleButton(b'\xef\x81\xb2'.decode("utf-8"), self) self._CloseButton.setObjectName("CloseButton") # 设置按钮的ObjectName以在qss样式表内定义不同的按钮样式 self._CloseButton.setToolTip("关闭窗口") self._CloseButton.setMouseTracking(True) # 设置按钮鼠标跟踪(如不设,则按钮在widget上层,无法实现跟踪) self._CloseButton.setFixedHeight(self._TitleLabel.height()) # 设置按钮高度为标题栏高度 self._CloseButton.clicked.connect(self.close) # 按钮信号连接到关闭窗口的槽函数 def setMinMaxButtons(self, bool): # 给widget定义一个setMinMaxButtons函数,为True时设置一组最小化最大化按钮 if bool == True: self._MinimumButton = QTitleButton(b'\xef\x80\xb0'.decode("utf-8"), self) self._MinimumButton.setObjectName("MinMaxButton") # 设置按钮的ObjectName以在qss样式表内定义不同的按钮样式 self._MinimumButton.setToolTip("最小化") self._MinimumButton.setMouseTracking(True) # 设置按钮鼠标跟踪(如不设,则按钮在widget上层,无法实现跟踪) self._MinimumButton.setFixedHeight(self._TitleLabel.height()) # 设置按钮高度为标题栏高度 self._MinimumButton.clicked.connect(self.showMinimized) # 按钮信号连接到最小化窗口的槽函数 self._MaximumButton = QTitleButton(b'\xef\x80\xb1'.decode("utf-8"), self) self._MaximumButton.setObjectName("MinMaxButton") # 设置按钮的ObjectName以在qss样式表内定义不同的按钮样式 self._MaximumButton.setToolTip("最大化") self._MaximumButton.setMouseTracking(True) # 设置按钮鼠标跟踪(如不设,则按钮在widget上层,无法实现跟踪) self._MaximumButton.setFixedHeight(self._TitleLabel.height()) # 设置按钮高度为标题栏高度 self._MaximumButton.clicked.connect(self._changeNormalButton) # 按钮信号连接切换到恢复窗口大小按钮函数 def _changeNormalButton(self): # 切换到恢复窗口大小按钮 try: self.showMaximized() # 先实现窗口最大化 self._MaximumButton.setText(b'\xef\x80\xb2'.decode("utf-8")) # 更改按钮文本 self._MaximumButton.setToolTip("恢复") # 更改按钮提示 self._MaximumButton.disconnect() # 断开原本的信号槽连接 self._MaximumButton.clicked.connect(self._changeMaxButton) # 重新连接信号和槽 except: pass def _changeMaxButton(self): # 切换到最大化按钮 try: self.showNormal() self._MaximumButton.setText(b'\xef\x80\xb1'.decode("utf-8")) self._MaximumButton.setToolTip("最大化") self._MaximumButton.disconnect() self._MaximumButton.clicked.connect(self._changeNormalButton) except: pass def resizeEvent(self, QResizeEvent): # 自定义窗口调整大小事件 self._TitleLabel.setFixedWidth(self.width()) # 将标题标签始终设为窗口宽度 # 分别移动三个按钮到正确的位置 try: self._CloseButton.move(self.width() - self._CloseButton.width(), 0) except: pass try: self._MinimumButton.move(self.width() - (self._CloseButton.width() + 1) * 3 + 1, 0) except: pass try: self._MaximumButton.move(self.width() - (self._CloseButton.width() + 1) * 2 + 1, 0) except: pass # 重新调整边界范围以备实现鼠标拖放缩放窗口大小,采用三个列表生成式生成三个列表 self._right_rect = [QPoint(x, y) for x in range(self.width() - self._padding, self.width() + 1) for y in range(1, self.height() - self._padding)] self._bottom_rect = [QPoint(x, y) for x in range(1, self.width() - self._padding) for y in range(self.height() - self._padding, self.height() + 1)] self._corner_rect = [QPoint(x, y) for x in range(self.width() - self._padding, self.width() + 1) for y in range(self.height() - self._padding, self.height() + 1)] def mousePressEvent(self, event): # 重写鼠标点击的事件 if (event.button() == Qt.LeftButton) and (event.pos() in self._corner_rect): # 鼠标左键点击右下角边界区域 self._corner_drag = True event.accept() elif (event.button() == Qt.LeftButton) and (event.pos() in self._right_rect): # 鼠标左键点击右侧边界区域 self._right_drag = True event.accept() elif (event.button() == Qt.LeftButton) and (event.pos() in self._bottom_rect): # 鼠标左键点击下侧边界区域 self._bottom_drag = True event.accept() elif (event.button() == Qt.LeftButton) and (event.y() < self._TitleLabel.height()): # 鼠标左键点击标题栏区域 self._move_drag = True self.move_DragPosition = event.globalPos() - self.pos() event.accept() def mouseMoveEvent(self, QMouseEvent): # 判断鼠标位置切换鼠标手势 if QMouseEvent.pos() in self._corner_rect: self.setCursor(Qt.SizeFDiagCursor) elif QMouseEvent.pos() in self._bottom_rect: self.setCursor(Qt.SizeVerCursor) elif QMouseEvent.pos() in self._right_rect: self.setCursor(Qt.SizeHorCursor) else: self.setCursor(Qt.ArrowCursor) # 当鼠标左键点击不放及满足点击区域的要求后,分别实现不同的窗口调整 # 没有定义左方和上方相关的5个方向,主要是因为实现起来不难,但是效果很差,拖放的时候窗口闪烁,再研究研究是否有更好的实现 if Qt.LeftButton and self._right_drag: # 右侧调整窗口宽度 self.resize(QMouseEvent.pos().x(), self.height()) QMouseEvent.accept() elif Qt.LeftButton and self._bottom_drag: # 下侧调整窗口高度 self.resize(self.width(), QMouseEvent.pos().y()) QMouseEvent.accept() elif Qt.LeftButton and self._corner_drag: # 右下角同时调整高度和宽度 self.resize(QMouseEvent.pos().x(), QMouseEvent.pos().y()) QMouseEvent.accept() elif Qt.LeftButton and self._move_drag: # 标题栏拖放窗口位置 self.move(QMouseEvent.globalPos() - self.move_DragPosition) QMouseEvent.accept() def mouseReleaseEvent(self, QMouseEvent): # 鼠标释放后,各扳机复位 self._move_drag = False self._corner_drag = False self._bottom_drag = False self._right_drag = False if __name__ == "__main__": from PyQt5.QtWidgets import QApplication import sys app = QApplication(sys.argv) app.setStyleSheet(open("./UnFrameStyle.qss").read()) window = QUnFrameWindow() window.setCloseButton(True) window.setMinMaxButtons(True) window.show() sys.exit(app.exec_())

qss文件

/**********Title**********/ QTitleLabel{ background-color: Gainsboro; font: 100 10pt; } /**********Button**********/ QTitleButton{ background-color: rgba(255, 255, 255, 0); color: black; border: 0px; font: 100 10pt; } QTitleButton#MinMaxButton:hover{ background-color: #D0D0D1; border: 0px; font: 100 10pt; } QTitleButton#CloseButton:hover{ background-color: #D32424; color: white; border: 0px; font: 100 10pt; }
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