【PyQt4執行個體11】各種Graphics Items

#-*- coding:utf-8 -*-

from PyQt4.QtCore import *
from PyQt4.QtGui import *
import math

QTextCodec.setCodecForTr(QTextCodec.codecForName("utf-8"))

class FlashItem(QGraphicsItem):
    def __init__(self,QObject):
        super(FlashItem,self).__init__()
        self.timer = QTimer()
        self.flash = True
        self.setFlag(self.ItemIsMovable)
        aa=QObject()
        aa.startTimer(50)
    
    def boundingRect(self):
        adjust = 2
        return QRectF(-10 - adjust,-10 - adjust,43 + adjust,43 + adjust)
    
    def paint(self,painter,option,widget):
        painter.setPen(Qt.NoPen)
        painter.setBrush(Qt.darkGray)
        painter.drawEllipse(-7,-7,40,40)
        
        painter.setPen(QPen(Qt.black,0))
        painter.setBrush(self.flash if Qt.red else Qt.yellow)
        painter.drawEllipse(-10,-10,40,40)
    
    def timerEvent(self,QTimerEvent):
        self.flash = not flash
        self.update()

class StarItem(QGraphicsItem):
    def __init__(self):
        super(StarItem,self).__init__()
        self.fix = QPixmap()
        self.fix.load("image/star.png")
    
    def boundingRect(self):
        return QRectF(-self.fix.width()/2,-self.fix.height()/2,self.fix.width(),self.fix.height())
    
    def paint(self,painter,option,widget):
        painter.drawPixmap(self.boundingRect().topLeft(),self.fix)
        
        
class MainWindow(QMainWindow):
    def __init__(self,QWidget):
        super(MainWindow,self).__init__()
        self.createActions()
        self.createMenus()
                
        self.scene = QGraphicsScene(self)
        self.scene.setSceneRect(-200,-200,600,600)
        self.initScene()
        
        self.view = QGraphicsView()
        self.view.setScene(self.scene)
        self.view.setMinimumSize(600,600)
        self.view.show()
        
        self.setCentralWidget(self.view)
        self.resize(800,600)
        self.setWindowTitle(self.tr("各種Graphics Items"))
    
    def createActions(self):
        self.newAct = QAction(self.tr("New"),self)
        self.connect(self.newAct,SIGNAL("triggered()"),self.slotNew)
        
        self.clearAct = QAction(self.tr("Clear"),self)
        self.connect(self.clearAct,SIGNAL("triggered()"),self.slotCrear)
        
        self.exitAct = QAction(self.tr("Exit"),self)
        self.addEllipseItemAct = QAction(self.tr("Add Ellipse"),self)
        self.addPolygonItemAct = QAction(self.tr("Add Polygon"),self)
        self.addTextItemAct = QAction(self.tr("Add Text"),self)
        self.addFlashItemAct = QAction(self.tr("Add Flash"),self)
        self.addRectItemAct = QAction(self.tr("Add Rectangle"),self)
        self.addAnimItemAct = QAction(self.tr("Add Animation"),self)
        self.addAlphaItemAct = QAction(self.tr("Add Alpha-png"),self)
    
    def createMenus(self):
        fileMenu = self.menuBar().addMenu(self.tr("File"))
        fileMenu.addAction(self.newAct)
        fileMenu.addAction(self.clearAct)
        fileMenu.addAction(self.exitAct)
        fileMenu.addAction(self.addEllipseItemAct)
        fileMenu.addAction(self.addPolygonItemAct)
        fileMenu.addAction(self.addTextItemAct)
        fileMenu.addAction(self.addFlashItemAct)
        fileMenu.addAction(self.addRectItemAct)
        fileMenu.addAction(self.addAnimItemAct)
        fileMenu.addAction(self.addAlphaItemAct)
    
    def initScene(self):
        for i in range(3):
            self.slotAddFlashItem()
        for i in range(3):
            self.slotAddEllipseItem()
        for i in range(3):
            self.slotAddRectItem()
        for i in range(3):
            self.slotAddAlphaItem()
        for i in range(3):
            self.slotAddPolygonItem()
        for i in range(3):
            self.slotAddTextItem()
        for i in range(3):
            self.slotAddAnimationItem()
        
    
    def slotNew(self):
        self.slotCrear()
        self.initScene()
        newWin = MainWindow(self)
        newWin.show()
    
    def slotCrear(self):
        listItem = self.scene.items()
        while(len(listItem) != 0):
            self.scene.removeItem(listItem[0])
            listItem.remove(listItem[0])
    
    def slotAddEllipseItem(self):
        item = QGraphicsEllipseItem(QRectF(0,0,80,60))
        item.setPen(QPen(Qt.NoPen))
        item.setBrush(QColor(qrand()%256,qrand()%256,qrand()%256))
        scale = ((qrand()%10)+1)/5.0
        item.scale(scale,scale)
        item.setFlag(QGraphicsItem.ItemIsMovable)
        self.scene.addItem(item)
        item.setPos((qrand()%int(self.scene.sceneRect().width())) - 200,(qrand()%int(self.scene.sceneRect().height())) - 200)
    
    def slotAddPolygonItem(self):
        v = [QPointF(30,-15),QPointF(0,-30),QPointF(30,-15),QPointF(30,-15),QPointF(0,30),QPointF(30,15)]
        item = QGraphicsPolygonItem(QPolygonF(v))
        item.setBrush(QColor(qrand()%256,qrand()%256,qrand()%256))
        item.setFlag(QGraphicsItem.ItemIsMovable)
        self.scene.addItem(item)
        item.setPos((qrand()%int(self.scene.sceneRect().width())) - 200,(qrand()%int(self.scene.sceneRect().height())) - 200)
        
    def slotAddRectItem(self):
        item = QGraphicsRectItem(QRectF(0,0,60,60))
        pen = QPen()
        pen.setWidth(3)
        pen.setColor(QColor(qrand()%256,qrand()%256,qrand()%256))
        item.setPen(pen)
        item.setBrush(QColor(qrand()%256,qrand()%256,qrand()%256))
        item.setFlag(QGraphicsItem.ItemIsMovable)
        self.scene.addItem(item)
        item.setPos((qrand()%int(self.scene.sceneRect().width())) - 200,(qrand()%int(self.scene.sceneRect().height())) - 200)
    
    def slotAddTextItem(self):
        font = QFont("Times",16)
        item = QGraphicsTextItem("Hello Qt")
        item.setFont(font)
        item.setFlag(QGraphicsItem.ItemIsMovable)
        item.setDefaultTextColor(QColor(qrand()%256,qrand()%256,qrand()%256))
        self.scene.addItem(item)
        item.setPos((qrand()%int(self.scene.sceneRect().width())) - 200,(qrand()%int(self.scene.sceneRect().height())) - 200)
    
    def slotAddFlashItem(self):
        item = FlashItem(QObject)
        scale = ((qrand()%10) + 1)/5.0
        item.scale(scale,scale)
        self.scene.addItem(item)
        item.setPos((qrand()%int(self.scene.sceneRect().width())) - 200,(qrand()%int(self.scene.sceneRect().height())) - 200)
    
    def slotAddAlphaItem(self):
        item = self.scene.addPixmap(QPixmap("image/butterfly.png"))
        item.setFlag(QGraphicsItem.ItemIsMovable)
        item.setPos((qrand()%int(self.scene.sceneRect().width())) - 200,(qrand()%int(self.scene.sceneRect().height())) - 200)
    
    def slotAddAnimationItem(self):
        item = StarItem()
        anim = QGraphicsItemAnimation()
        anim.setItem(item)
        timeLine = QTimeLine(4000)
        timeLine.setCurveShape(QTimeLine.SineCurve)
        timeLine.setLoopCount(0)
        anim.setTimeLine(timeLine)
        y = (qrand()%800) - 600
        for i in range(800):
            anim.setPosAt(i/800.0,QPointF(i - 600,y))
        timeLine.start()
        self.scene.addItem(item)

if __name__ == '__main__':
    import sys
    app = QApplication(sys.argv)
    mainwindow = MainWindow(QWidget)
    mainwindow.show()
    sys.exit(app.exec_())