1 files changed, 252 insertions, 0 deletions
diff --git a/examples2/tut12.py b/examples2/tut12.py
new file mode 100755
index 0000000..65490ca
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+++ b/examples2/tut12.py
@@ -0,0 +1,252 @@
+#!/usr/bin/env python
+
+# Qt tutorial 12.
+
+import sys
+import math
+import random
+from qt import *
+
+
+class LCDRange(QVBox):
+    def __init__(self,s=None,parent=None,name=None):
+        QVBox.__init__(self,parent,name)
+
+        lcd = QLCDNumber(2,self,'lcd')
+        self.slider = QSlider(Qt.Horizontal,self,'slider')
+        self.slider.setRange(0,99)
+        self.slider.setValue(0)
+
+        self.label = QLabel(' ',self,'label')
+        self.label.setAlignment(Qt.AlignCenter)
+
+        self.connect(self.slider,SIGNAL('valueChanged(int)'),lcd,SLOT('display(int)'))
+        self.connect(self.slider,SIGNAL('valueChanged(int)'),self,PYSIGNAL('valueChanged(int)'))
+
+        self.setFocusProxy(self.slider)
+
+        if s is not None:
+            self.setText(s)
+
+    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)
+
+    def text(self):
+        return self.label.text()
+
+    def setText(self,s):
+        self.label.setText(s)
+
+
+class CannonField(QWidget):
+    def __init__(self,parent=None,name=None):
+        QWidget.__init__(self,parent,name)
+
+        self.ang = 45
+        self.f = 0
+        self.timerCount = 0
+
+        self.autoShootTimer = QTimer(self,'movement handler')
+        self.connect(self.autoShootTimer,SIGNAL('timeout()'),self.moveShot)
+
+        self.shoot_ang = 0
+        self.shoot_f = 0
+        self.target = QPoint(0,0)
+
+        self.setPalette(QPalette(QColor(250,250,200)))
+
+        self.barrelRect = QRect(33,-4,15,8)
+
+        self.newTarget()
+
+    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(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(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 newTarget(self):
+        r = QRegion(self.targetRect())
+        self.target = QPoint(random.randint(200,390),random.randint(10,265))
+        self.repaint(r.unite(QRegion(self.targetRect())))
+
+    def moveShot(self):
+        r = QRegion(self.shotRect())
+        self.timerCount = self.timerCount + 1
+
+        shotR = self.shotRect()
+
+        if shotR.intersects(self.targetRect()):
+            self.autoShootTimer.stop()
+            self.emit(PYSIGNAL('hit()'),())
+        elif shotR.x() > self.width() or shotR.y() > self.height():
+            self.autoShootTimer.stop()
+            self.emit(PYSIGNAL('missed()'),())
+        else:
+            r = r.unite(QRegion(shotR))
+
+        self.repaint(r)
+
+    def paintEvent(self,ev):
+        updateR = ev.rect()
+        p = QPainter(self)
+
+        if updateR.intersects(self.cannonRect()):
+            self.paintCannon(p)
+
+        if self.autoShootTimer.isActive() and updateR.intersects(self.shotRect()):
+            self.paintShot(p)
+
+        if updateR.intersects(self.targetRect()):
+            self.paintTarget(p)
+
+    def paintShot(self,p):
+        p.setBrush(Qt.black)
+        p.setPen(Qt.NoPen)
+        p.drawRect(self.shotRect())
+
+    def paintTarget(self,p):
+        p.setBrush(Qt.red)
+        p.setPen(Qt.black)
+        p.drawRect(self.targetRect())
+
+    def paintCannon(self,p):
+        cr = self.cannonRect()
+        pix = QPixmap(cr.size())
+        pix.fill(self,cr.topLeft())
+
+        tmp = QPainter(pix)
+        tmp.setBrush(Qt.blue)
+        tmp.setPen(Qt.NoPen)
+
+        tmp.translate(0,pix.height() - 1)
+        tmp.drawPie(QRect(-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 = QRect(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 = QRect(0,0,6,6)
+        r.moveCenter(QPoint(x,self.height() - 1 - y))
+        return r
+
+    def targetRect(self):
+        r = QRect(0,0,20,10)
+        r.moveCenter(QPoint(self.target.x(),self.height() - 1 - self.target.y()))
+        return r
+
+    def sizePolicy(self):
+        return QSizePolicy(QSizePolicy.Expanding,QSizePolicy.Expanding)
+
+
+class MyWidget(QWidget):
+    def __init__(self,parent=None,name=None):
+        QWidget.__init__(self,parent,name)
+
+        quit = QPushButton('&Quit',self,'quit')
+        quit.setFont(QFont('Times',18,QFont.Bold))
+        self.connect(quit,SIGNAL('clicked()'),qApp,SLOT('quit()'))
+
+        self.angle = LCDRange('ANGLE',self,'angle')
+        self.angle.setRange(5,70)
+
+        self.force = LCDRange('FORCE',self,'force')
+        self.force.setRange(10,50)
+
+        self.cannonField = CannonField(self,'cannonField')
+
+        self.connect(self.angle,PYSIGNAL('valueChanged(int)'),self.cannonField.setAngle)
+        self.connect(self.cannonField,PYSIGNAL('angleChanged(int)'),self.angle.setValue)
+
+        self.connect(self.force,PYSIGNAL('valueChanged(int)'),self.cannonField.setForce)
+        self.connect(self.cannonField,PYSIGNAL('forceChanged(int)'),self.force.setValue)
+
+        shoot = QPushButton('&Shoot',self,'shoot')
+        shoot.setFont(QFont('Times',18,QFont.Bold))
+        self.connect(shoot,SIGNAL('clicked()'),self.cannonField.shoot)
+
+        grid = QGridLayout(self,2,2,10)
+
+        grid.addWidget(quit,0,0)
+        grid.addWidget(self.cannonField,1,1)
+        grid.setColStretch(1,10)
+
+        leftBox = QVBoxLayout()
+        grid.addLayout(leftBox,1,0)
+        leftBox.addWidget(self.angle)
+        leftBox.addWidget(self.force)
+
+        topBox = QHBoxLayout()
+        grid.addLayout(topBox,0,1)
+        topBox.addWidget(shoot)
+        topBox.addStretch(1)
+
+        self.angle.setValue(60)
+        self.force.setValue(25)
+        self.angle.setFocus()
+
+
+QApplication.setColorSpec(QApplication.CustomColor)
+a = QApplication(sys.argv)
+
+w = MyWidget()
+w.setGeometry(100,100,500,355)
+a.setMainWidget(w)
+w.show()
+a.exec_loop()