python GUI库图形界面开发之库图形界面开发之PyQt5不规则窗口实现与显示不规则窗口实现与显示
GIF动画的详细方法与实例动画的详细方法与实例
PyQt5不规则窗口实现动画效果实例不规则窗口实现动画效果实例
import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
class ShapeWidget(QWidget):
def __init__(self,parent=None):
super(ShapeWidget, self).__init__(parent)
self.i=1
self.mypix()
self.timer=QTimer()
self.timer.setInterval(500)
self.timer.timeout.connect(self.timeChanged)
self.timer.start()
#显示不规则图片
def mypix(self):
self.update()
if self.i==5:
self.i=1
self.mypic={1:'./images/left.png',2:'./images/up.png',3:'./images/right.png',4:'./images/down.png'}
self.pix=QPixmap(self.mypic[self.i],'0',Qt.AvoidDither|Qt.ThresholdAlphaDither|Qt.ThresholdDither)
self.resize(self.pix.size())
self.setMask(self.pix.mask())
self.dragPosition=None
def mousePressEvent(self, QMouseEvent):
if QMouseEvent.button()==Qt.LeftButton:
self.m_drag=True
self.m_DragPosition=QMouseEvent.globalPos()-self.pos()
QMouseEvent.accept()
self.setCursor(QCursor(Qt.OpenHandCursor))
def mouseMoveEvent(self, QMouseEvent):
if Qt.LeftButton and self.m_drag:
self.move(QMouseEvent.globalPos()-self.m_DragPosition)
QMouseEvent.accept()
def mouseReleaseEvent(self, QMouseEvent):
self.m_drag=False
self.setCursor(QCursor(Qt.ArrowCursor))
def paintEvent(self, QPaintEvent):
painter=QPainter(self)
painter.drawPixmap(0,0,self.pix.width(),self.pix.height(),self.pix)
def mouseDoubleClickEvent(self, QMouseEvent):
if QMouseEvent.button()==1:
self.i+=1
self.mypix()
def timeChanged(self):
self.i+=1
self.mypix()
if __name__ == '__main__':
app=QApplication(sys.argv)
form=ShapeWidget()
form.show()
sys.exit(app.exec_())
运行程序，效果如下
代码分析代码分析
运行这个例子，会弹出一个窗口，显示不同方向的箭头，每0.5秒改变一次方向
pixmap.setMask()函数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地方，使控件看起来是透明的，它的参数
是一个QBitmap对象或一个QRegion对象
本例中调用QPixmap实例的self.pix.mask()函数获得图片自身的遮罩，这个遮罩是一个QBitmap对象
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