Pyqt设置背景颜色和背景图片、QPalette调色板与QPainter画板区别、不规则图片

 1 # -*- coding: utf-8 -*- 2 import sys 3 from PyQt4 import QtGui 4 from PyQt4.QtGui import * 5 from PyQt4.QtCore import * 6  7  8 class Icon(QtGui.QWidget): 9     def __init__(self, parent=None):10         QtGui.QWidget.__init__(self, parent)11         palette1 = QtGui.QPalette(self)12         palette1.setColor(self.backgroundRole(), QColor(192,253,123))   # 设置背景颜色13         # palette1.setBrush(self.backgroundRole(), QtGui.QBrush(QtGui.QPixmap('../../../Document/images/17_big.jpg')))   # 设置背景图片14         self.setPalette(palette1)15         self.setAutoFillBackground(True) # 不设置也可以16         self.setGeometry(300, 300, 250, 150)17         self.setWindowTitle('Icon')18         self.setWindowIcon(QtGui.QIcon('../../../Document/images/Firefox.png'))19         mylayout = QVBoxLayout()20         self.setLayout(mylayout)21 22 23 24 25 app = QtGui.Qapplication(sys.argv)26 icon = Icon()27 icon.show()28 sys.exit(app.exec_())

 1 # -*- coding: UTF8 -*- 2 from PyQt4 import QtGui 3 from PyQt4.QtGui import * 4 import sys 5  6 ''' 7 调色板:   palette    铺平整个背景 （小于窗体有多个图片） 8 png 如果有图层，背景为黑色，可图层覆盖 9 '''10 class Icon(QtGui.QWidget):11     def __init__(self, parent=None):12 13         QtGui.QWidget.__init__(self, parent)14         self.resize(256, 256)15         self.setWindowTitle('Icon')16         mylayout = QVBoxLayout()17         self.setLayout(mylayout)18 19     def paintEvent(self, event):20         palette1 = QtGui.QPalette(self)21         palette1.setColor(self.backgroundRole(), QColor(192, 253, 123))   # 设置背景颜色22         palette1.setBrush(self.backgroundRole(), QtGui.QBrush(QtGui.QPixmap('1.png')))   # 设置背景图片23         self.setPalette(palette1)24  25  26 app = QtGui.QApplication(sys.argv)27 icon = Icon()28 icon.show()29 sys.exit(app.exec_())

 1 # -*- coding: UTF8 -*- 2 from PyQt4.QtGui import * 3 from PyQt4.QtCore import * 4  5 ''' 6  绘制QPainter 窗体    显示一个 7 QPainter默认只能在paintEvent里面调用   否则：QPainter::begin: Paint device returned engine == 0, type: 1 8 ''' 9 class MyForm(QWidget):10     def __init__(self,parent=None):11         super(MyForm, self).__init__(parent)12         self.resize(256, 256)13 14     def paintEvent(self, event):15         painter = QPainter()16         painter.begin(self)17         painter.setRenderHint(QPainter.Antialiasing)18         painter.setPen(Qt.NoPen)19         painter.drawPixmap(0, 0, 256, 256, QPixmap("1.png"))20         painter.end()21 22 23 app = QApplication([])24 form = MyForm()25 form.show()26 app.exec_()

1 self.update()2 self.repaint()

 1 # -*- coding: UTF8 -*- 2 from PyQt4.QtGui import * 3 from PyQt4.QtCore import *   4 import sys   5    6 class ShapeWidget(QWidget):   7     def __init__(self,parent=None):   8         super(ShapeWidget,self).__init__(parent) 9         self.i = 110         self.mypix()11         self.timer = QTimer()12         self.timer.setInterval(500)  # 500秒13         self.timer.timeout.connect(self.timeChange)   14         self.timer.start()15 16     # 显示不规则 pic17     def mypix(self):18         self.update()19         if self.i == 5:20             self.i = 121         self.mypic = {1: 'Left_Button.png', 2: "Up_Button.png", 3: 'Right_Button.png', 4: 'Down_Button.png'}22         self.pix = QPixmap(self.mypic[self.i], "0", Qt.AvoidDither | Qt.ThresholdDither | Qt.ThresholdAlphaDither)  #23         self.resize(self.pix.size())24         self.setMask(self.pix.mask())    #setMask()的作用是为调用它的控件增加一个遮罩，遮住所选区域以外的部分使之看起来是透明的， 它的参数可为一个QBitmap对象或一个QRegion对象，此处调用QPixmap的mask()函数获得图片自身的遮罩，为一个QBitmap对象。实例中使用的是png格式的图片，它的透明部分实际上即是一个遮罩。25         self.dragPosition=None26 27     #重定义鼠标按下响应函数mousePRessEvent(QMouseEvent)和鼠标移动响应函数mouseMoveEvent(QMouseEvent)，使不规则窗体能响应鼠标事件，随意拖动。28     def mousePressEvent(self, event):29         if event.button() == Qt.LeftButton:30             self.dragPosition = event.globalPos()-self.frameGeometry().topLeft()    #保存当前鼠标点所在的位置相对于窗体左上角的偏移值dragPosition，31             event.accept()32         if event.button() == Qt.RightButton:33             self.close()34   35     def mouseMoveEvent(self, event):36         if event.buttons() & Qt.LeftButton:  37             self.move(event.globalPos()-self.dragPosition)   # 当左键移动窗体修改偏移值38             event.accept()  39     # 如何激活 paintEvent 呢？ 一般 paintEvent 在窗体首次绘制加载， 要重新加载paintEvent 需要重新加载窗口使用 self.update() or  self.repaint()40     def paintEvent(self, event):41         painter = QPainter(self)42         painter.drawPixmap(0, 0, self.pix.width(),self.pix.height(),self.pix)43     # 鼠标双击事件44     def mouseDoubleClickEvent(self, event):45         if event.button() == 1:46             self.i+=147             self.mypix()48 49     #每**秒修改paint50     def timeChange(self):51         self.i+=152         self.mypix()53 54 if __name__ == '__main__':55     app=QApplication(sys.argv)56     form=ShapeWidget()57     form.show()58     app.exec_()

 1 # -*- coding: utf-8 -*- 2 import sys 3 from PyQt4 import QtCore,QtGui 4 class loadingGif(QtGui.QWidget): 5     def __init__(self,parent=None): 6         super(loadingGif, self).__init__(parent) 7         self.label = QtGui.QLabel('', self) 8         self.setFixedSize(200,200) 9         self.setWindowFlags(QtCore.Qt.Dialog|QtCore.Qt.CustomizeWindowHint)10         self.movie = QtGui.QMovie("loading.gif")11         self.label.setMovie(self.movie)12         self.movie.start()13 14 if __name__ == '__main__':15     app = QtGui.QApplication(sys.argv)16     mw = loadingGif()17     mw.show()18     sys.exit(app.exec_())