多线程中的信号槽

–uøsub¿-„á÷/ý\:ôI[ûÑ]([e-mail])å:2008-01-05ŽfIèã:å‡c9nThreading,Signals/SlotsûÑg\l(¦šÑË(¸”(-ýG0^8ö„З(ÛLå{‹Ð—ö88q͏c8„ˆo:†ðî˜ìïåö„ЗÎGUI¿-ûúeUì0*work¿-Ù7„ÝGUIïåÝ
ö;͔b„‹P-ì:‚UÐ(¿(*work¿-ŒØ6”Ò„Í\(Ø6ŒÑá÷åGUI¿ÛL:b/„ÐLHœ(7Lb–Hüeøs!Wv-mathŒrandom!W(Ø6”Ò„öimportmath,random,sysfromPyQt4.QtCoreimport*fromPyQt4.QtGuiimport*classWindow(QWidget):def__init__(self,parent=None):QWidget.__init__(self,parent)2011-3-8¿-„á÷/ý&googlecode.com/&/threading_si&1/5self.thread=Worker();—ãÎQWidgetçöú*Worker¿(ŽŒøsÍ\;—ã+*label*spinbox(Ž¾nØ6„”Òpî * ®¿“ú„þa(æ*QLabelviewer -:label=QLabel(self.tr(Numberofstars:))self.spinBox=QSpinBox()self.spinBox.setMaximum(10000)self.spinBox.setValue(1000)self.startButton=QPushButton(self.tr(&Start))self.viewer=QLabel()self.viewer.setFixedSize(300,300)¿„finished()Œterminated()á÷«Þ¥0self.updateUi(Žô°Lboutput(QRect,QImage)á÷Þ¥0addImage()(ŽØ6U*„”Òself.connect(self.thread,SIGNAL(finished()),self.updateUi)self.connect(self.thread,SIGNAL(terminated()),self.updateUi)self.connect(self.thread,SIGNAL(output(QRect,QImage)),self.addImage)self.connect(self.startButton,SIGNAL(clicked()),self.makePicture) ®„clicked()á÷Þ¥0makePicture()(Ž/¨work¿Ï*èöCÇgrid@¡he¡6¾n—ã˜layout=QGridLayout()layout.addWidget(label,0,0)layout.addWidget(self.spinBox,0,1)layout.addWidget(self.startButton,0,2)layout.addWidget(self.viewer,1,0,1,3)self.setLayout(layout)self.setWindowTitle(self.tr(SimpleThreadingExample))makePicture();Œ*Í\1.bî9Lb2.Í°*°„pixmap3.Ëå\¿„Ø6Í\defmakePicture(self):self.spinBox.setReadOnly(True)self.startButton.setEnabled(False)pixmap=QPixmap(self.viewer.size())pixmap.fill(Qt.black)self.viewer.setPixmap(pixmap)self.thread.render(self.viewer.size(),self.spinBox.value())ì(viewer„'Œ”Ò„pî\:ÂpÙwork¿„renderýpÛLØ6Í\v-”Ò„pîÎÑW·ÖspinBox.value() SworkŒ*”Ò„Ø6öÑ*á÷(addImage()ýaddImage()ý9n”Ò„@(MnŒù”„pixmap(view-:6ô°—ã2011-3-8¿-„á÷/ý&googlecode.com/&/threading_si&2/5defaddImage(self,rect,image):pixmap=self.viewer.pixmap()painter=QPainter()painter.begin(pixmap)painter.drawImage(rect,image)painter.end()self.viewer.update(rect)ìÇQPainterŒØ6Í\updateUi()ý(work¿ŒhèÍ\„ö«æÑöb—ã ®ŒÑW„¶
defupdateUi(self):self.spinBox.setReadOnly(False)self.startButton.setEnabled(True)MbìòÏåSH(*—ãèö-(work¿b/work„wSž°Worker¿:†ý(¿-ô}„(Qt„á÷ýy'ì(PyQt-„¿eãÿPython,«„¿:6classWorker(QThread):def__init__(self,parent=None):QThread.__init__(self,parent)self.exiting=Falseself.size=QSize(0,0)self.stars=0(work¿-ÝX›ú,„Ø6áovùƒìÛLËv-exiting(Ž°U¿„å\¶
Ï*”ÒýÇQPainterPathØ6self.path=QPainterPath()angle=2*math.pi/5self.outerRadius=20self.innerRadius=8self.path.moveTo(self.outerRadius,0)forstepinrange(1,6):self.path.lineTo(self.innerRadius*math.cos((step-0.5)*angle),self.innerRadius*math.sin((step-0.5)*angle))self.path.lineTo(self.outerRadius*math.cos(step*angle),self.outerRadius*math.sin(step*angle))self.path.closeSubpath()2011-3-8¿-„á÷/ý&googlecode.com/&/threading_si&3/5Swork¿ùa(«Á„ö\b¿(__del__ýp-(¿„wait()I…¿„údef__del__(self):self.exiting=Trueself.wait()(2ӔÒKMìH°Uøs„Ø6áo6/¿defrender(self,size,stars):self.size=sizeself.stars=starsself.start()start()¹(e/¨¿vÐL¿{-„run()¹Õ(ÙÌìÍ°ž°†run()¹ÕìÇrender()ýpeãÿô¥(run()Ù7ì1ïåÇrenderÙ¿øsáorun()¹ÕšI‚defrun(self):#Note:Thisisnevercalleddirectly.ItiscalledbyQtoncethe#threadenvironmenthasbeensetup.random.seed()n=self.starswidth=self.size.width()height=self.size.height()MbòÏÝX„^'áoù”Ø6”Ò„pîŒù”„Ø6:ß(Ø6Ï*”Ò„öìÀKself.exiting„¶
Ù7ïånÝ(ûUö;ýïåú¿whilenotself.exitingandn0:image=QImage(self.outerRadius*2,self.outerRadius*2,QImage.Format_ARGB32)image.fill(qRgba(0,0,0,0))x=random.randrange(0,width)y=random.randrange(0,height)angle=random.randrange(0,360)red=random.randrange(0,256)green=random.randrange(0,256)blue=random.randrange(0,256)alpha=random.randrange(0,256)painter=QPainter()painter.begin(image)painter.setRenderHint(QPainter.Antialiasing)painter.setPen(Qt.NoPen)painter.setBrush(QColor(red,green,blue,alpha))painter.translate(self.outerRadius,self.outerRadius)painter.rotate(angle)2011-3-8¿-„á÷/ý&googlecode.com/&/threading_si&4/5painter.drawPath(self.path)painter.end()wS„Ø6ã
Œ¿sûv'ìê/(:߅:0¹Ø6„”ÒSÏ*”Ò«Ø6Œö;ìÇÑoutput(QRect,QImage)á÷eåGUI¿egLøs„Í\self.emit(SIGNAL(output(QRect,QImage)),QRect(x-self.outerRadius,y-self.outerRadius,self.outerRadius*2,self.outerRadius*2),image)n-=1(Ù͹ïå(¿KôQRectŒQImageùa/¨ã
if__name__==__main__:app=QApplication(sys.argv)window=Window()window.show()sys.exit(app.exec_())hèã
GeneratedatSatJan512:37:522008by1.5.42011-3-8¿-„á÷/ý&googlecode.com/&/threading_si&5/5