PyQt5实现自定义窗口的拖动关闭缩放功能
#!/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_())
