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97 lines
2.6 KiB
97 lines
2.6 KiB
15 years ago
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#!/usr/bin/env python
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# Qt tutorial 8.
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import sys
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from qt import *
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class LCDRange(QVBox):
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def __init__(self,parent=None,name=None):
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QVBox.__init__(self,parent,name)
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lcd = QLCDNumber(2,self,'lcd')
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self.slider = QSlider(Qt.Horizontal,self,'slider')
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self.slider.setRange(0,99)
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self.slider.setValue(0)
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self.connect(self.slider,SIGNAL('valueChanged(int)'),lcd,SLOT('display(int)'))
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self.connect(self.slider,SIGNAL('valueChanged(int)'),self,PYSIGNAL('valueChanged(int)'))
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self.setFocusProxy(self.slider)
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def value(self):
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return self.slider.value()
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def setValue(self,value):
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self.slider.setValue(value)
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def setRange(self,minVal,maxVal):
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if minVal < 0 or maxVal > 99 or minVal > maxVal:
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raise ValueError, 'LCDRange.setRange(): invalid range'
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self.slider.setRange(minVal,maxVal)
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class CannonField(QWidget):
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def __init__(self,parent=None,name=None):
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QWidget.__init__(self,parent,name)
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self.ang = 45
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self.setPalette(QPalette(QColor(250,250,200)))
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def angle(self):
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return self.ang
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def setAngle(self,degrees):
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if degrees < 5:
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degrees = 5
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if degrees > 70:
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degrees = 70
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if self.ang == degrees:
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return
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self.ang = degrees
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self.repaint()
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self.emit(PYSIGNAL('angleChanged(int)'),(self.ang,))
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def paintEvent(self,ev):
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p = QPainter(self)
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p.drawText(200,200,'Angle = %d' % (self.ang))
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def sizePolicy(self):
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return QSizePolicy(QSizePolicy.Expanding,QSizePolicy.Expanding)
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class MyWidget(QWidget):
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def __init__(self,parent=None,name=None):
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QWidget.__init__(self,parent,name)
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quit = QPushButton('Quit',self,'quit')
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quit.setFont(QFont('Times',18,QFont.Bold))
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self.connect(quit,SIGNAL('clicked()'),qApp,SLOT('quit()'))
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self.angle = LCDRange(self,'angle')
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self.angle.setRange(5,70)
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self.cannonField = CannonField(self,'cannonField')
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self.connect(self.angle,PYSIGNAL('valueChanged(int)'),self.cannonField.setAngle)
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self.connect(self.cannonField,PYSIGNAL('angleChanged(int)'),self.angle.setValue)
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grid = QGridLayout(self,2,2,10)
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grid.addWidget(quit,0,0)
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grid.addWidget(self.angle,1,0,Qt.AlignTop)
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grid.addWidget(self.cannonField,1,1)
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grid.setColStretch(1,10)
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self.angle.setValue(60)
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self.angle.setFocus()
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a = QApplication(sys.argv)
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w = MyWidget()
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w.setGeometry(100,100,500,355)
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a.setMainWidget(w)
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w.show()
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a.exec_loop()
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