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#!/usr/bin/env python
# TQt tutorial 11.
import sys
import math
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.f = 0
self.timerCount = 0
self.autoShootTimer = qt.TQTimer(self, "movement handler")
self.connect(self.autoShootTimer, qt.SIGNAL("timeout()"), self.moveShot)
self.shoot_ang = 0
self.shoot_f = 0
self.setPalette(qt.TQPalette(qt.TQColor(250, 250, 200)))
self.barrelRect = qt.TQRect(33, -4, 15, 8)
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.cannonRect(), 0)
self.emit(qt.PYSIGNAL("angleChanged(int)"), (self.ang, ))
def force(self):
return self.f
def setForce(self, newton):
if newton < 0:
newton = 0
if self.f == newton:
return
self.f = newton
self.emit(qt.PYSIGNAL("forceChanged(int)"), (self.f, ))
def shoot(self):
if self.autoShootTimer.isActive():
return
self.timerCount = 0
self.shoot_ang = self.ang
self.shoot_f = self.f
self.autoShootTimer.start(50)
def moveShot(self):
r = qt.TQRegion(self.shotRect())
self.timerCount = self.timerCount + 1
shotR = self.shotRect()
if shotR.x() > self.width() or shotR.y() > self.height():
self.autoShootTimer.stop()
else:
r = r.unite(qt.TQRegion(shotR))
self.repaint(r)
def paintEvent(self, ev):
updateR = ev.rect()
p = qt.TQPainter(self)
if updateR.intersects(self.cannonRect()):
self.paintCannon(p)
if self.autoShootTimer.isActive() and updateR.intersects(self.shotRect()):
self.paintShot(p)
def paintShot(self, p):
p.setBrush(qt.TQt.black)
p.setPen(qt.TQt.NoPen)
p.drawRect(self.shotRect())
def paintCannon(self, p):
cr = self.cannonRect()
pix = qt.TQPixmap(cr.size())
pix.fill(self, cr.topLeft())
tmp = qt.TQPainter(pix)
tmp.setBrush(qt.TQt.blue)
tmp.setPen(qt.TQt.NoPen)
tmp.translate(0, pix.height() - 1)
tmp.drawPie(qt.TQRect(-35, -35, 70, 70), 0, 90 * 16)
tmp.rotate(-self.ang)
tmp.drawRect(self.barrelRect)
tmp.end()
p.drawPixmap(cr.topLeft(), pix)
def cannonRect(self):
r = qt.TQRect(0, 0, 50, 50)
r.moveBottomLeft(self.rect().bottomLeft())
return r
def shotRect(self):
gravity = 4.0
time = self.timerCount / 4.0
velocity = self.shoot_f
radians = self.shoot_ang * 3.14159265 / 180
velx = velocity * math.cos(radians)
vely = velocity * math.sin(radians)
x0 = (self.barrelRect.right() + 5) * math.cos(radians)
y0 = (self.barrelRect.right() + 5) * math.sin(radians)
x = x0 + velx * time
y = y0 + vely * time - 0.5 * gravity * time * time
r = qt.TQRect(0, 0, 6, 6)
r.moveCenter(qt.TQPoint(x, self.height() - 1 - y))
return r
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.qApp, qt.SLOT("quit()"))
self.angle = LCDRange(self, "angle")
self.angle.setRange(5, 70)
self.force = LCDRange(self, "force")
self.force.setRange(10, 50)
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)
self.connect(self.force, qt.PYSIGNAL("valueChanged(int)"), self.cannonField.setForce)
self.connect(self.cannonField, qt.PYSIGNAL("forceChanged(int)"), self.force.setValue)
shoot = qt.TQPushButton("&Shoot", self, "shoot")
shoot.setFont(qt.TQFont("Times", 18, qt.TQFont.Bold))
self.connect(shoot, qt.SIGNAL("clicked()"), self.cannonField.shoot)
grid = qt.TQGridLayout(self, 2, 2, 10)
grid.addWidget(quit, 0, 0)
grid.addWidget(self.cannonField, 1, 1)
grid.setColStretch(1, 10)
leftBox = qt.TQVBoxLayout()
grid.addLayout(leftBox, 1, 0)
leftBox.addWidget(self.angle)
leftBox.addWidget(self.force)
topBox = qt.TQHBoxLayout()
grid.addLayout(topBox, 0, 1)
topBox.addWidget(shoot)
topBox.addStretch(1)
self.angle.setValue(60)
self.force.setValue(25)
self.angle.setFocus()
qt.TQApplication.setColorSpec(qt.TQApplication.CustomColor)
a = qt.TQApplication(sys.argv)
w = MyWidget()
w.setGeometry(100, 100, 500, 355)
a.setMainWidget(w)
w.show()
sys.exit(a.exec_loop())
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