无边框自定义标题栏及最大化最小化窗体大小调整

无边框自定义标题栏及最大化最小化窗体大小调整

转自：https://www.cnblogs.com/jyroy/p/9461317.html

陈述

隐藏掉系统的控制栏，实现了自定义的标题控制栏，以及关闭/最大化/最小化的功能，自由调整窗体大小的功能，代码内有详细注释

只要把MainWindow类自己实现就可以了

vm16/wangyiyun_prj$ cat run.py 
#!/usr/bin/env python
# coding=utf-8
#!/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_())

LeftTabWidget.py
如下：

/wangyiyun_prj$ cat  LeftTabWidget.py 
#!/usr/bin/env python
# coding=utf-8
#!/usr/bin/env python
# -*- coding:utf-8 -*-
# Author: jyroy
import sys

from PyQt5.QtCore import QUrl
from PyQt5.QtWebEngineWidgets import *
#from PyQt5.QtWebKitWidgets import QWebView
from PyQt5.QtWidgets import QApplication
from PyQt5.QtWidgets import QListWidget,QStackedWidget
from PyQt5.QtWidgets import QListWidgetItem
from PyQt5.QtWidgets import QWidget
from PyQt5.QtWidgets import QHBoxLayout

from PyQt5.QtCore import QSize, Qt



class LeftTabWidget(QWidget):
    '''左侧选项栏'''
    def __init__(self):
        super(LeftTabWidget, self).__init__()
        self.setObjectName('LeftTabWidget')
        
        self.setWindowTitle('LeftTabWidget')
        with open('./QListWidgetQSS.qss', 'r') as f:   #导入QListWidget的qss样式
            self.list_style = f.read()

        self.main_layout = QHBoxLayout(self, spacing=0)     #窗口的整体布局
        self.main_layout.setContentsMargins(0,0,0,0)

        self.left_widget = QListWidget()     #左侧选项列表
        self.left_widget.setStyleSheet(self.list_style)
        self.main_layout.addWidget(self.left_widget)

        self.right_widget = QStackedWidget()
        self.main_layout.addWidget(self.right_widget)

        self._setup_ui()

    def _setup_ui(self):
        '''加载界面ui'''

        self.left_widget.currentRowChanged.connect(self.right_widget.setCurrentIndex)   #list和右侧窗口的index对应绑定

        self.left_widget.setFrameShape(QListWidget.NoFrame)    #去掉边框

        self.left_widget.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)  #隐藏滚动条
        self.left_widget.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)

        list_str = ['岗位需求','专业要求','薪水分布','城市分布']
        url_list = ['job_num_wordcloud.html', 'edu_need.html', 'salary_bar.html', 'edu_salary_bar.html']

        for i in range(4):
            self.item = QListWidgetItem(list_str[i],self.left_widget)   #左侧选项的添加
            self.item.setSizeHint(QSize(30,60))
            self.item.setTextAlignment(Qt.AlignCenter)                  #居中显示

            self.browser = QWebEngineView() #QWebView()                                   #右侧用QWebView来显示html网页
            self.browser.setUrl(QUrl.fromLocalFile('D://python//code//vision//%s' % url_list[i])) #可以自己设置相应的html文件，无关紧要
            self.right_widget.addWidget(self.browser)

作者：JYRoy

出处：https://www.cnblogs.com/jyroy/p/9461317.html

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