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python GUI庫(kù)圖形界面開(kāi)發(fā)之PyQt5不規(guī)則窗口實(shí)現(xiàn)與顯示GIF動(dòng)畫(huà)的詳細(xì)方法與實(shí)例

更新時(shí)間：2020年03月09日 08:51:34 作者：jia666666

這篇文章主要介紹了python GUI庫(kù)圖形界面開(kāi)發(fā)之PyQt5不規(guī)則窗口與顯示GIF動(dòng)畫(huà)的詳細(xì)方法與實(shí)例,需要的朋友可以參考下

PyQt5不規(guī)則窗口實(shí)現(xiàn)動(dòng)畫(huà)效果實(shí)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()
  #顯示不規(guī)則圖片
  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_())

運(yùn)行程序，效果如下

代碼分析

運(yùn)行這個(gè)例子，會(huì)彈出一個(gè)窗口，顯示不同方向的箭頭，每0.5秒改變一次方向

pixmap.setMask()函數(shù)的作用是為調(diào)用它的控件增加一個(gè)遮罩，遮住所選區(qū)域以外的地方，使控件看起來(lái)是透明的，它的參數(shù)是一個(gè)QBitmap對(duì)象或一個(gè)QRegion對(duì)象

本例中調(diào)用QPixmap實(shí)例的self.pix.mask()函數(shù)獲得圖片自身的遮罩，這個(gè)遮罩是一個(gè)QBitmap對(duì)象

self.pix=QPixmap(self.mypic[self.i],'0',Qt.AvoidDither|Qt.ThresholdAlphaDither|Qt.ThresholdDither)

self.resize(self.pix.size())

self.setMask(self.pix.mask())

paintEvent（）函數(shù)每次初始化窗口時(shí)只調(diào)用一次，所以沒(méi)加載一次圖片就要重新調(diào)用一次paintEvent（）函數(shù)，即在更新窗口時(shí)調(diào)用這個(gè)函數(shù)，更新窗口的核心代碼如下

self.timer=QTimer()

self.timer.setInterval(500)

self.timer.timeout.connect(self.timeChanged)

self.timer.start()

當(dāng)定時(shí)器的時(shí)間到期后更新窗口代碼

self.update

PyQt5加載GIF動(dòng)畫(huà)實(shí)例

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)
    #實(shí)例化標(biāo)簽到窗口中
    self.label=QLabel('',self)
    #設(shè)置標(biāo)簽的寬度與高度
    self.setFixedSize(128,128)
    #設(shè)置無(wú)邊框
    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_())

運(yùn)行效果