#!/usr/bin/env python # -*- coding:utf-8 -*- # Author: jyroy import sys from PyQt5.QtCore import QSize from PyQt5.QtWidgets import QApplication from PyQt5.QtCore import Qt, pyqtSignal, QPoint from PyQt5.QtGui import QFont, QEnterEvent, QPainter, QColor, QPen from PyQt5.QtWidgets import QWidget, QVBoxLayout, QHBoxLayout, QLabel,QSpacerItem, QSizePolicy, QPushButton from PyQt5.QtGui import QIcon from PyQt5.QtWidgets import QWidget, QVBoxLayout, QPushButton, QTextEdit # from LeftTabWidget import LeftTabWidget # 样式 StyleSheet = """ /*标题栏*/ TitleBar { background-color: red; } /*最小化最大化关闭按钮通用默认背景*/ #buttonMinimum,#buttonMaximum,#buttonClose { border: none; background-color: red; } /*悬停*/ #buttonMinimum:hover,#buttonMaximum:hover { background-color: red; color: white; } #buttonClose:hover { color: white; } /*鼠标按下不放*/ #buttonMinimum:pressed,#buttonMaximum:pressed { background-color: Firebrick; } #buttonClose:pressed { color: white; background-color: Firebrick; } """ class TitleBar(QWidget): # 窗口最小化信号 windowMinimumed = pyqtSignal() # 窗口最大化信号 windowMaximumed = pyqtSignal() # 窗口还原信号 windowNormaled = pyqtSignal() # 窗口关闭信号 windowClosed = pyqtSignal() # 窗口移动 windowMoved = pyqtSignal(QPoint) def __init__(self, *args, **kwargs): super(TitleBar, self).__init__(*args, **kwargs) # 支持qss设置背景 self.setAttribute(Qt.WA_StyledBackground, True) self.mPos = None self.iconSize = 20 # 图标的默认大小 # 设置默认背景颜色,否则由于受到父窗口的影响导致透明 self.setAutoFillBackground(True) palette = self.palette() palette.setColor(palette.Window, QColor(240, 240, 240)) self.setPalette(palette) # 布局 layout = QHBoxLayout(self, spacing=0) layout.setContentsMargins(0, 0, 0, 0) # 窗口图标 self.iconLabel = QLabel(self) # self.iconLabel.setScaledContents(True) layout.addWidget(self.iconLabel) # 窗口标题 self.titleLabel = QLabel(self) self.titleLabel.setMargin(2) layout.addWidget(self.titleLabel) # 中间伸缩条 layout.addSpacerItem(QSpacerItem( 40, 20, QSizePolicy.Expanding, QSizePolicy.Minimum)) # 利用Webdings字体来显示图标 font = self.font() or QFont() font.setFamily('Webdings') # 最小化按钮 self.buttonMinimum = QPushButton( '0', self, clicked=self.windowMinimumed.emit, font=font, objectName='buttonMinimum') layout.addWidget(self.buttonMinimum) # 最大化/还原按钮 self.buttonMaximum = QPushButton( '1', self, clicked=self.showMaximized, font=font, objectName='buttonMaximum') layout.addWidget(self.buttonMaximum) # 关闭按钮 self.buttonClose = QPushButton( 'r', self, clicked=self.windowClosed.emit, font=font, objectName='buttonClose') layout.addWidget(self.buttonClose) # 初始高度 self.setHeight() def showMaximized(self): if self.buttonMaximum.text() == '1': # 最大化 self.buttonMaximum.setText('2') self.windowMaximumed.emit() else: # 还原 self.buttonMaximum.setText('1') self.windowNormaled.emit() def setHeight(self, height=38): """设置标题栏高度""" self.setMinimumHeight(height) self.setMaximumHeight(height) # 设置右边按钮的大小 self.buttonMinimum.setMinimumSize(height, height) self.buttonMinimum.setMaximumSize(height, height) self.buttonMaximum.setMinimumSize(height, height) self.buttonMaximum.setMaximumSize(height, height) self.buttonClose.setMinimumSize(height, height) self.buttonClose.setMaximumSize(height, height) def setTitle(self, title): """设置标题""" self.titleLabel.setText(title) def setIcon(self, icon): """设置图标""" self.iconLabel.setPixmap(icon.pixmap(self.iconSize, self.iconSize)) def setIconSize(self, size): """设置图标大小""" self.iconSize = size def enterEvent(self, event): self.setCursor(Qt.ArrowCursor) super(TitleBar, self).enterEvent(event) def mouseDoubleClickEvent(self, event): super(TitleBar, self).mouseDoubleClickEvent(event) self.showMaximized() def mousePressEvent(self, event): """鼠标点击事件""" if event.button() == Qt.LeftButton: self.mPos = event.pos() event.accept() def mouseReleaseEvent(self, event): '''鼠标弹起事件''' self.mPos = None event.accept() def mouseMoveEvent(self, event): if event.buttons() == Qt.LeftButton and self.mPos: self.windowMoved.emit(self.mapToGlobal(event.pos() - self.mPos)) event.accept() # 枚举左上右下以及四个定点 Left, Top, Right, Bottom, LeftTop, RightTop, LeftBottom, RightBottom = range(8) class FramelessWindow(QWidget): # 四周边距 Margins = 5 def __init__(self, *args, **kwargs): super(FramelessWindow, self).__init__(*args, **kwargs) self._pressed = False self.Direction = None # 背景透明 self.setAttribute(Qt.WA_TranslucentBackground, True) # 无边框 self.setWindowFlags(Qt.FramelessWindowHint) # 隐藏边框 # 鼠标跟踪 self.setMouseTracking(True) # 布局 layout = QVBoxLayout(self, spacing=0) # 预留边界用于实现无边框窗口调整大小 layout.setContentsMargins( self.Margins, self.Margins, self.Margins, self.Margins) # 标题栏 self.titleBar = TitleBar(self) layout.addWidget(self.titleBar) # 信号槽 self.titleBar.windowMinimumed.connect(self.showMinimized) self.titleBar.windowMaximumed.connect(self.showMaximized) self.titleBar.windowNormaled.connect(self.showNormal) self.titleBar.windowClosed.connect(self.close) self.titleBar.windowMoved.connect(self.move) self.windowTitleChanged.connect(self.titleBar.setTitle) self.windowIconChanged.connect(self.titleBar.setIcon) def setTitleBarHeight(self, height=38): """设置标题栏高度""" self.titleBar.setHeight(height) def setIconSize(self, size): """设置图标的大小""" self.titleBar.setIconSize(size) def setWidget(self, widget): """设置自己的控件""" if hasattr(self, '_widget'): return self._widget = widget # 设置默认背景颜色,否则由于受到父窗口的影响导致透明 self._widget.setAutoFillBackground(True) palette = self._widget.palette() palette.setColor(palette.Window, QColor(240, 240, 240)) self._widget.setPalette(palette) self._widget.installEventFilter(self) self.layout().addWidget(self._widget) def move(self, pos): if self.windowState() == Qt.WindowMaximized or self.windowState() == Qt.WindowFullScreen: # 最大化或者全屏则不允许移动 return super(FramelessWindow, self).move(pos) def showMaximized(self): """最大化,要去除上下左右边界,如果不去除则边框地方会有空隙""" super(FramelessWindow, self).showMaximized() self.layout().setContentsMargins(0, 0, 0, 0) def showNormal(self): """还原,要保留上下左右边界,否则没有边框无法调整""" super(FramelessWindow, self).showNormal() self.layout().setContentsMargins( self.Margins, self.Margins, self.Margins, self.Margins) def eventFilter(self, obj, event): """事件过滤器,用于解决鼠标进入其它控件后还原为标准鼠标样式""" if isinstance(event, QEnterEvent): self.setCursor(Qt.ArrowCursor) return super(FramelessWindow, self).eventFilter(obj, event) def paintEvent(self, event): """由于是全透明背景窗口,重绘事件中绘制透明度为1的难以发现的边框,用于调整窗口大小""" super(FramelessWindow, self).paintEvent(event) painter = QPainter(self) painter.setPen(QPen(QColor(255, 255, 255, 1), 2 * self.Margins)) painter.drawRect(self.rect()) def mousePressEvent(self, event): """鼠标点击事件""" super(FramelessWindow, self).mousePressEvent(event) if event.button() == Qt.LeftButton: self._mpos = event.pos() self._pressed = True def mouseReleaseEvent(self, event): '''鼠标弹起事件''' super(FramelessWindow, self).mouseReleaseEvent(event) self._pressed = False self.Direction = None def mouseMoveEvent(self, event): """鼠标移动事件""" super(FramelessWindow, self).mouseMoveEvent(event) pos = event.pos() xPos, yPos = pos.x(), pos.y() wm, hm = self.width() - self.Margins, self.height() - self.Margins if self.isMaximized() or self.isFullScreen(): self.Direction = None self.setCursor(Qt.ArrowCursor) return if event.buttons() == Qt.LeftButton and self._pressed: self._resizeWidget(pos) return if xPos <= self.Margins and yPos <= self.Margins: # 左上角 self.Direction = LeftTop self.setCursor(Qt.SizeFDiagCursor) elif wm <= xPos <= self.width() and hm <= yPos <= self.height(): # 右下角 self.Direction = RightBottom self.setCursor(Qt.SizeFDiagCursor) elif wm <= xPos and yPos <= self.Margins: # 右上角 self.Direction = RightTop self.setCursor(Qt.SizeBDiagCursor) elif xPos <= self.Margins and hm <= yPos: # 左下角 self.Direction = LeftBottom self.setCursor(Qt.SizeBDiagCursor) elif 0 <= xPos <= self.Margins and self.Margins <= yPos <= hm: # 左边 self.Direction = Left self.setCursor(Qt.SizeHorCursor) elif wm <= xPos <= self.width() and self.Margins <= yPos <= hm: # 右边 self.Direction = Right self.setCursor(Qt.SizeHorCursor) elif self.Margins <= xPos <= wm and 0 <= yPos <= self.Margins: # 上面 self.Direction = Top self.setCursor(Qt.SizeVerCursor) elif self.Margins <= xPos <= wm and hm <= yPos <= self.height(): # 下面 self.Direction = Bottom self.setCursor(Qt.SizeVerCursor) def _resizeWidget(self, pos): """调整窗口大小""" if self.Direction == None: return mpos = pos - self._mpos xPos, yPos = mpos.x(), mpos.y() geometry = self.geometry() x, y, w, h = geometry.x(), geometry.y(), geometry.width(), geometry.height() if self.Direction == LeftTop: # 左上角 if w - xPos > self.minimumWidth(): x += xPos w -= xPos if h - yPos > self.minimumHeight(): y += yPos h -= yPos elif self.Direction == RightBottom: # 右下角 if w + xPos > self.minimumWidth(): w += xPos self._mpos = pos if h + yPos > self.minimumHeight(): h += yPos self._mpos = pos elif self.Direction == RightTop: # 右上角 if h - yPos > self.minimumHeight(): y += yPos h -= yPos if w + xPos > self.minimumWidth(): w += xPos self._mpos.setX(pos.x()) elif self.Direction == LeftBottom: # 左下角 if w - xPos > self.minimumWidth(): x += xPos w -= xPos if h + yPos > self.minimumHeight(): h += yPos self._mpos.setY(pos.y()) elif self.Direction == Left: # 左边 if w - xPos > self.minimumWidth(): x += xPos w -= xPos else: return elif self.Direction == Right: # 右边 if w + xPos > self.minimumWidth(): w += xPos self._mpos = pos else: return elif self.Direction == Top: # 上面 if h - yPos > self.minimumHeight(): y += yPos h -= yPos else: return elif self.Direction == Bottom: # 下面 if h + yPos > self.minimumHeight(): h += yPos self._mpos = pos else: return self.setGeometry(x, y, w, h) class MainWindow(QWidget): def __init__(self, *args, **kwargs): super(MainWindow, self).__init__(*args, **kwargs) layout = QVBoxLayout(self, spacing=0) layout.setContentsMargins(0, 0, 0, 0) # self.left_tag = LeftTabWidget() # layout.addWidget(self.left_tag) if __name__ == '__main__': app = QApplication(sys.argv) app.setStyleSheet(StyleSheet) mainWnd = FramelessWindow() mainWnd.setWindowTitle('测试标题栏') mainWnd.setWindowIcon(QIcon('Qt.ico')) mainWnd.resize(QSize(1250,780)) mainWnd.setWidget(MainWindow(mainWnd)) # 把自己的窗口添加进来 mainWnd.show() sys.exit(app.exec_())