python GUI库图形界面开发之PyQt5不规则窗口实现与显示GIF动画的详细方法与实例

脚本专栏 2024/11/8 佚名

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PyQt5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

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

"htmlcode">

import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
class LoadingGifWin(QWidget):
  def __init__(self,parent=None):
    super(LoadingGifWin, self).__init__(parent)
    #实例化标签到窗口中
    self.label=QLabel('',self)
    #设置标签的宽度与高度
    self.setFixedSize(128,128)
    #设置无边框
    self.setWindowFlags(Qt.Dialog | Qt.CustomizeWindowHint)
    self.movie=QMovie('./images/loading.gif')
    self.label.setMovie(self.movie)
    self.movie.start()
if __name__ == '__main__':
  app=QApplication(sys.argv)
  load=LoadingGifWin()
  load.show()
  sys.exit(app.exec_())

运行效果