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+#!/usr/bin/env python
+
+# TQt tutorial 8.
+
+import sys
+from python_tqt import qt
+
+
+class LCDRange(qt.TQVBox):
+ def __init__(self, parent=None, name=None):
+ qt.TQVBox.__init__(self, parent, name)
+
+ lcd = qt.TQLCDNumber(2, self, "lcd")
+ self.slider = qt.TQSlider(qt.TQt.Horizontal, self, "slider")
+ self.slider.setRange(0, 99)
+ self.slider.setValue(0)
+ self.connect(self.slider, qt.SIGNAL("valueChanged(int)"), lcd, qt.SLOT("display(int)"))
+ self.connect(self.slider, qt.SIGNAL("valueChanged(int)"), self, qt.PYSIGNAL("valueChanged(int)"))
+
+ self.setFocusProxy(self.slider)
+
+ def value(self):
+ return self.slider.value()
+
+ def setValue(self, value):
+ self.slider.setValue(value)
+
+ def setRange(self, minVal, maxVal):
+ if minVal < 0 or maxVal > 99 or minVal > maxVal:
+ raise ValueError("LCDRange.setRange(): invalid range")
+
+ self.slider.setRange(minVal, maxVal)
+
+
+class CannonField(qt.TQWidget):
+ def __init__(self, parent=None, name=None):
+ qt.TQWidget.__init__(self, parent, name)
+
+ self.ang = 45
+ self.setPalette(qt.TQPalette(qt.TQColor(250, 250, 200)))
+
+ def angle(self):
+ return self.ang
+
+ def setAngle(self, degrees):
+ if degrees < 5:
+ degrees = 5
+ if degrees > 70:
+ degrees = 70
+ if self.ang == degrees:
+ return
+ self.ang = degrees
+ self.repaint()
+ self.emit(qt.PYSIGNAL("angleChanged(int)"), (self.ang, ))
+
+ def paintEvent(self, ev):
+ p = qt.TQPainter(self)
+ p.drawText(200, 200, "Angle = %d" % (self.ang))
+
+ def sizePolicy(self):
+ return qt.TQSizePolicy(qt.TQSizePolicy.Expanding, qt.TQSizePolicy.Expanding)
+
+
+class MyWidget(qt.TQWidget):
+ def __init__(self, parent=None, name=None):
+ qt.TQWidget.__init__(self, parent, name)
+
+ quit = qt.TQPushButton("Quit", self, "quit")
+ quit.setFont(qt.TQFont("Times", 18, qt.TQFont.Bold))
+ self.connect(quit, qt.SIGNAL("clicked()"), qt.tqApp, qt.SLOT("quit()"))
+
+ self.angle = LCDRange(self, "angle")
+ self.angle.setRange(5, 70)
+
+ self.cannonField = CannonField(self, "cannonField")
+
+ self.connect(self.angle, qt.PYSIGNAL("valueChanged(int)"), self.cannonField.setAngle)
+ self.connect(self.cannonField, qt.PYSIGNAL("angleChanged(int)"), self.angle.setValue)
+
+ grid = qt.TQGridLayout(self, 2, 2, 10)
+
+ grid.addWidget(quit, 0, 0)
+ grid.addWidget(self.angle, 1, 0, qt.TQt.AlignTop)
+ grid.addWidget(self.cannonField, 1, 1)
+ grid.setColStretch(1, 10)
+
+ self.angle.setValue(60)
+ self.angle.setFocus()
+
+
+a = qt.TQApplication(sys.argv)
+
+w = MyWidget()
+w.setGeometry(100, 100, 500, 355)
+a.setMainWidget(w)
+w.show()
+sys.exit(a.exec_loop())