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#!/usr/bin/env python
# PyQt tutorial 11
import sys
import math
from PySide2 import QtCore, QtGui
class LCDRange(QtGui.QWidget):
def __init__(self, parent=None):
QtGui.QWidget.__init__(self, parent)
lcd = QtGui.QLCDNumber(2)
self.slider = QtGui.QSlider(QtCore.Qt.Horizontal)
self.slider.setRange(0, 99)
self.slider.setValue(0)
self.connect(self.slider, QtCore.SIGNAL("valueChanged(int)"),
lcd, QtCore.SLOT("display(int)"))
self.connect(self.slider, QtCore.SIGNAL("valueChanged(int)"),
self, QtCore.SIGNAL("valueChanged(int)"))
layout = QtGui.QVBoxLayout()
layout.addWidget(lcd)
layout.addWidget(self.slider)
self.setLayout(layout)
self.setFocusProxy(self.slider)
def value(self):
return self.slider.value()
def setValue(self, value):
self.slider.setValue(value)
def setRange(self, minValue, maxValue):
if minValue < 0 or maxValue > 99 or minValue > maxValue:
QtCore.qWarning("LCDRange::setRange(%d, %d)\n"
"\tRange must be 0..99\n"
"\tand minValue must not be greater than maxValue" % (minValue, maxValue))
return
self.slider.setRange(minValue, maxValue)
class CannonField(QtGui.QWidget):
def __init__(self, parent=None):
QtGui.QWidget.__init__(self, parent)
self.currentAngle = 45
self.currentForce = 0
self.timerCount = 0
self.autoShootTimer = QtCore.QTimer(self)
self.connect(self.autoShootTimer, QtCore.SIGNAL("timeout()"),
self.moveShot)
self.shootAngle = 0
self.shootForce = 0
self.setPalette(QtGui.QPalette(QtGui.QColor(250, 250, 200)))
self.setAutoFillBackground(True)
def angle(self):
return self.currentAngle
def setAngle(self, angle):
if angle < 5:
angle = 5
if angle > 70:
angle = 70;
if self.currentAngle == angle:
return
self.currentAngle = angle
self.update()
self.emit(QtCore.SIGNAL("angleChanged(int)"), self.currentAngle)
def force(self):
return self.currentForce
def setForce(self, force):
if force < 0:
force = 0
if self.currentForce == force:
return
self.currentForce = force;
self.emit(QtCore.SIGNAL("forceChanged(int)"), self.currentForce)
def shoot(self):
if self.autoShootTimer.isActive():
return
self.timerCount = 0
self.shootAngle = self.currentAngle
self.shootForce = self.currentForce
self.autoShootTimer.start(5)
def moveShot(self):
region = QtGui.QRegion(self.shotRect())
self.timerCount += 1
shotR = self.shotRect()
if shotR.x() > self.width() or shotR.y() > self.height():
self.autoShootTimer.stop()
else:
region = region.united(QtGui.QRegion(shotR))
self.update(region)
def paintEvent(self, event):
painter = QtGui.QPainter(self)
self.paintCannon(painter)
if self.autoShootTimer.isActive():
self.paintShot(painter)
def paintShot(self, painter):
painter.setPen(QtCore.Qt.NoPen);
painter.setBrush(QtCore.Qt.black)
painter.drawRect(self.shotRect())
barrelRect = QtCore.QRect(33, -4, 15, 8)
def paintCannon(self, painter):
painter.setPen(QtCore.Qt.NoPen)
painter.setBrush(QtCore.Qt.blue)
painter.save()
painter.translate(0, self.height())
painter.drawPie(QtCore.QRect(-35, -35, 70, 70), 0, 90 * 16)
painter.rotate(-self.currentAngle)
painter.drawRect(CannonField.barrelRect)
painter.restore()
def cannonRect(self):
result = QtCore.QRect(0, 0, 50, 50)
result.moveBottomLeft(self.rect().bottomLect())
return result
def shotRect(self):
gravity = 4.0
time = self.timerCount / 40.0
velocity = self.shootForce
radians = self.shootAngle * 3.14159265 / 180
velx = velocity * math.cos(radians)
vely = velocity * math.sin(radians)
x0 = (CannonField.barrelRect.right() + 5) * math.cos(radians)
y0 = (CannonField.barrelRect.right() + 5) * math.sin(radians)
x = x0 + velx * time
y = y0 + vely * time - 0.5 * gravity * time * time
result = QtCore.QRect(0, 0, 6, 6)
result.moveCenter(QtCore.QPoint(QtCore.qRound(x), self.height() - 1 - QtCore.qRound(y)))
return result
class MyWidget(QtGui.QWidget):
def __init__(self, parent=None):
QtGui.QWidget.__init__(self, parent)
quit = QtGui.QPushButton("&Quit")
quit.setFont(QtGui.QFont("Times", 18, QtGui.QFont.Bold))
self.connect(quit, QtCore.SIGNAL("clicked()"),
QtGui.qApp, QtCore.SLOT("quit()"))
angle = LCDRange()
angle.setRange(5, 70)
force = LCDRange()
force.setRange(10, 50)
cannonField = CannonField()
self.connect(angle, QtCore.SIGNAL("valueChanged(int)"),
cannonField.setAngle)
self.connect(cannonField, QtCore.SIGNAL("angleChanged(int)"),
angle.setValue)
self.connect(force, QtCore.SIGNAL("valueChanged(int)"),
cannonField.setForce)
self.connect(cannonField, QtCore.SIGNAL("forceChanged(int)"),
force.setValue)
shoot = QtGui.QPushButton("&Shoot")
shoot.setFont(QtGui.QFont("Times", 18, QtGui.QFont.Bold))
self.connect(shoot, QtCore.SIGNAL("clicked()"), cannonField.shoot)
topLayout = QtGui.QHBoxLayout()
topLayout.addWidget(shoot)
topLayout.addStretch(1)
leftLayout = QtGui.QVBoxLayout()
leftLayout.addWidget(angle)
leftLayout.addWidget(force)
gridLayout = QtGui.QGridLayout()
gridLayout.addWidget(quit, 0, 0)
gridLayout.addLayout(topLayout, 0, 1)
gridLayout.addLayout(leftLayout, 1, 0)
gridLayout.addWidget(cannonField, 1, 1, 2, 1)
gridLayout.setColumnStretch(1, 10)
self.setLayout(gridLayout)
angle.setValue(60)
force.setValue(25)
angle.setFocus()
app = QtGui.QApplication(sys.argv)
widget = MyWidget()
widget.setGeometry(100, 100, 500, 355)
widget.show()
sys.exit(app.exec_())
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