pyQt5设计无边框窗口（二）

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无边框，自定义窗口背景

效果图：

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设置窗口背景有三种方式：

使用QSS设置窗口背景
使用QPalette设置窗口背景
实现PainEvent，使用QPainter绘制背景

注意：
PyQt5设置QWidget窗口背景时，不能使用QSS方式，因为QWidget自带有窗口背景，所以使用QPalette设置窗口背景

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QSS方式设置背景：

from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
import sysapp = QApplication(sys.argv)
win = QMainWindow()#设置窗口标题与初始大小
win.setWindowTitle("界面背景图片设置")
win.resize(350, 250)
#设置对象名称
win.setObjectName("MainWindow")# #todo 1 设置窗口背景图片
win.setStyleSheet("#MainWindow{border-image:url(./r4.jpg);}")
win.setWindowFlags(Qt.FramelessWindowHint) # 无边框#todo 2 设置窗口背景色
#win.setStyleSheet("#MainWindow{background-color: yellow}")win.show()
sys.exit(app.exec_())

效果图：

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点击主窗口按钮弹出子窗口，美化按键
UI.py

from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
from PyQt5.QtGui import *
import sysclass Communicate(QObject):
closeApp = pyqtSignal()class Example1(QMainWindow):
_startPos = None
_endPos = None
_isTracking = False def __init__(self):
super().__init__()
self.initUI()
self.center() def center(self, screenNum=0):
'''多屏居中支持''' screen = QDesktopWidget().screenGeometry()
size = self.geometry() self.normalGeometry2 = QRect((screen.width() - size.width()) / 2 + screen.left(),
(screen.height() - size.height()) / 2, size.width(), size.height())
self.setGeometry((screen.width() - size.width()) / 2 + screen.left(),
(screen.height() - size.height()) / 2, size.width(), size.height())
print("1") def initUI(self):
self.setFixedSize(QSize(400, 300)) self.setWindowFlags(Qt.FramelessWindowHint) # 无边框
btn1 = QPushButton("Button 1", self)
btn1.move(80, 150) btn2 = QPushButton("Button 2", self)
btn2.move(220, 150)
btn3 = QPushButton("☜",self)
btn3.move(0, 0)
btn4 = QPushButton("☞", self)
btn4.move(300, 260) btn1.clicked.connect(self.buttonClicked)
btn2.clicked.connect(self.buttonClicked)
btn3.clicked.connect(self.buttonClicked)
btn4.clicked.connect(self.buttonClicked) self.statusBar() self.c = Communicate()
self.c.closeApp.connect(self.close) self.setGeometry(300, 300, 290, 150)
self.setWindowTitle('Event sender')
self.window().setStyleSheet('''
QPushButton{
border:none;
color:black;
font-size:20px;
height:40px;
padding-left:5px;
padding-right:10px;
text-align:left;
}
QPushButton:hover{
color:red;
border:1px solid #F3F3F5;
border-radius:10px;
background:LightGray;
} QMainWindow{
background:gray;
border-top:1px solid white;
border-bottom:1px solid white;
border-left:1px solid white;
border-right:1px solid white;
border-top-left-radius:12px;
border-bottom-left-radius:12px;
border-top-right-radius:12px;
border-bottom-right-radius:12px;
}
''')
self.show() def buttonClicked(self):
sender = self.sender()
self.statusBar().showMessage(sender.text() + ' was pressed')
if sender.text()=="Button 1": print("执行%s"%sender.text())
elif sender.text()=="Button 2":
print("执行%s"%sender.text())
elif sender.text()=="☜":
print("执行%s"%sender.text())
import qt5
self.qt = qt5.Example()
self.qt._initUI()
else:
print("执行%s"%sender.text())
import qt5
self.qt=qt5.Example()
self.qt._initUI() def mouseMoveEvent(self, e: QMouseEvent): # 重写移动事件
self._endPos = e.pos() - self._startPos
self.move(self.pos() + self._endPos) def mousePressEvent(self, e: QMouseEvent):
if e.button() == Qt.LeftButton:
self._isTracking = True
self._startPos = QPoint(e.x(), e.y()) def mouseReleaseEvent(self, e: QMouseEvent):
if e.button() == Qt.LeftButton:
self._isTracking = False
self._startPos = None
self._endPos = Noneif __name__ == '__main__':
app = QApplication(sys.argv)
ex = Example1()
sys.exit(app.exec_())

qt5.py

效果图：

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from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
from PyQt5.QtGui import *
import sys
class Example(QWidget):
_startPos = None
_endPos = None
_isTracking = False def __init__(self):
super().__init__()
self._initUI()
self.center()
#self.Use_Qss()
#self.show() def center(self, screenNum=0):
'''多屏居中支持''' screen = QDesktopWidget().screenGeometry()
size = self.geometry() self.normalGeometry2 = QRect((screen.width() - size.width()) / 2 + screen.left(),
(screen.height() - size.height()) / 2, size.width(), size.height())
self.setGeometry((screen.width() - size.width()) / 2 + screen.left(),
(screen.height() - size.height()) / 2, size.width(), size.height()) def _initUI(self):
self.resize(350, 350)
self.setWindowFlags(Qt.FramelessWindowHint) # 无边框
#def Use_Qss(self):
palette = QPalette()
palette.setBrush(QPalette.Background, QBrush(QPixmap("./p1.jpg")))
self.setPalette(palette)
#self.setObjectName("MainWindow")
# #todo 1 设置窗口背景图片
#self.setStyleSheet("#MainWindow{border-image:url(.\p1.jpg);}")
# todo 2 设置窗口背景色
#self.setStyleSheet("#MainWindow{background-color: gray}")
self.lb1 = QLabel(self)
qle = QLineEdit(self) qle.move(60, 100)
self.lb1.move(60, 40) qle.textChanged[str].connect(self.onChanged) self.setGeometry(300, 300, 280, 170)
self.setWindowTitle('单行文本')
self.show() def onChanged(self, text):
self.lb1.setText(text)
self.lb1.adjustSize() def mouseMoveEvent(self, e: QMouseEvent): # 重写移动事件
self._endPos = e.pos() - self._startPos
self.move(self.pos() + self._endPos) def mousePressEvent(self, e: QMouseEvent):
if e.button() == Qt.LeftButton:
self._isTracking = True
self._startPos = QPoint(e.x(), e.y()) def mouseReleaseEvent(self, e: QMouseEvent):
if e.button() == Qt.LeftButton:
self._isTracking = False
self._startPos = None
self._endPos = Noneif __name__ == '__main__':
app = QApplication(sys.argv)
ex = Example()
sys.exit(app.exec_())

效果图：

美化：

self.lb1 = QLabel(self)
qle = QLineEdit(self) qle.move(60, 300)
self.lb1.move(60, 40)
qle.setStyleSheet(
'''QLineEdit{
border:1px solid gray;
background:cyan;
width:120px;
border-radius:10px;
padding:2px 4px;
font-family: 微软雅黑,宋体,Arial,Helvetica,Verdana,sans-serif;
}''')
self.lb1.setStyleSheet(
'''QLabel{
color:red;
font-size:60px;
font-family: 微软雅黑,宋体,Arial,Helvetica,Verdana,sans-serif;
}
'''
) qle.textChanged[str].connect(self.onChanged) self.setGeometry(600, 300, 480, 370)
self.setWindowTitle('单行文本')
self.show()