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98 lines
2.7 KiB
98 lines
2.7 KiB
13 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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import qt
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class LCDRange(qt.QVBox):
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def __init__(self, parent=None, name=None):
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qt.QVBox.__init__(self, parent, name)
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lcd = qt.QLCDNumber(2, self, "lcd")
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self.slider = qt.QSlider(qt.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, qt.SIGNAL("valueChanged(int)"), lcd, qt.SLOT("display(int)"))
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self.connect(self.slider, qt.SIGNAL("valueChanged(int)"), self, qt.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(qt.QWidget):
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def __init__(self, parent=None, name=None):
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qt.QWidget.__init__(self, parent, name)
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self.ang = 45
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self.setPalette(qt.QPalette(qt.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(qt.PYSIGNAL("angleChanged(int)"), (self.ang, ))
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def paintEvent(self, ev):
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p = qt.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 qt.QSizePolicy(qt.QSizePolicy.Expanding, qt.QSizePolicy.Expanding)
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class MyWidget(qt.QWidget):
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def __init__(self, parent=None, name=None):
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qt.QWidget.__init__(self, parent, name)
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quit = qt.QPushButton("Quit", self, "quit")
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quit.setFont(qt.QFont("Times", 18, qt.QFont.Bold))
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self.connect(quit, qt.SIGNAL("clicked()"), qt.qApp, qt.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, qt.PYSIGNAL("valueChanged(int)"), self.cannonField.setAngle)
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self.connect(self.cannonField, qt.PYSIGNAL("angleChanged(int)"), self.angle.setValue)
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grid = qt.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.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 = qt.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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sys.exit(a.exec_loop())
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