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#!/usr/bin/env python
############################################################################
##
## Copyright (C) 2006-2006 Trolltech ASA. All rights reserved.
##
## This file is part of the example classes of the Qt Toolkit.
##
## Licensees holding a valid Qt License Agreement may use this file in
## accordance with the rights, responsibilities and obligations
## contained therein. Please consult your licensing agreement or
## contact sales@trolltech.com if any conditions of this licensing
## agreement are not clear to you.
##
## Further information about Qt licensing is available at:
## http://www.trolltech.com/products/qt/licensing.html or by
## contacting info@trolltech.com.
##
## This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
## WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
##
############################################################################
import math
from PyQt4 import QtCore, QtGui
import mice_rc
class Mouse(QtGui.QGraphicsItem):
Pi = math.pi
TwoPi = 2.0 * Pi
# Create the bounding rectangle once.
adjust = 0.5
BoundingRect = QtCore.QRectF(-20 - adjust, -22 - adjust, 40 + adjust,
83 + adjust)
def __init__(self):
super(Mouse, self).__init__()
self.angle = 0.0
self.speed = 0.0
self.mouseEyeDirection = 0.0
self.color = QtGui.QColor(QtCore.qrand() % 256, QtCore.qrand() % 256,
QtCore.qrand() % 256)
self.rotate(QtCore.qrand() % (360 * 16))
# In the C++ version of this example, this class is also derived from
# QObject in order to receive timer events. PyQt does not support
# deriving from more than one wrapped class so we just create an
# explicit timer instead.
self.timer = QtCore.QTimer()
self.timer.timeout.connect(self.timerEvent)
self.timer.start(1000 / 33)
@staticmethod
def normalizeAngle(angle):
while angle < 0:
angle += Mouse.TwoPi
while angle > Mouse.TwoPi:
angle -= Mouse.TwoPi
return angle
def boundingRect(self):
return Mouse.BoundingRect
def shape(self):
path = QtGui.QPainterPath()
path.addRect(-10, -20, 20, 40)
return path;
def paint(self, painter, option, widget):
# Body.
painter.setBrush(self.color)
painter.drawEllipse(-10, -20, 20, 40)
# Eyes.
painter.setBrush(QtCore.Qt.white)
painter.drawEllipse(-10, -17, 8, 8)
painter.drawEllipse(2, -17, 8, 8)
# Nose.
painter.setBrush(QtCore.Qt.black)
painter.drawEllipse(QtCore.QRectF(-2, -22, 4, 4))
# Pupils.
painter.drawEllipse(QtCore.QRectF(-8.0 + self.mouseEyeDirection, -17, 4, 4))
painter.drawEllipse(QtCore.QRectF(4.0 + self.mouseEyeDirection, -17, 4, 4))
# Ears.
if self.scene().collidingItems(self):
painter.setBrush(QtCore.Qt.red)
else:
painter.setBrush(QtCore.Qt.darkYellow)
painter.drawEllipse(-17, -12, 16, 16)
painter.drawEllipse(1, -12, 16, 16)
# Tail.
path = QtGui.QPainterPath(QtCore.QPointF(0, 20))
path.cubicTo(-5, 22, -5, 22, 0, 25)
path.cubicTo(5, 27, 5, 32, 0, 30)
path.cubicTo(-5, 32, -5, 42, 0, 35)
painter.setBrush(QtCore.Qt.NoBrush)
painter.drawPath(path)
def timerEvent(self):
# Don't move too far away.
lineToCenter = QtCore.QLineF(QtCore.QPointF(0, 0), self.mapFromScene(0, 0))
if lineToCenter.length() > 150:
angleToCenter = math.acos(lineToCenter.dx() / lineToCenter.length())
if lineToCenter.dy() < 0:
angleToCenter = Mouse.TwoPi - angleToCenter;
angleToCenter = Mouse.normalizeAngle((Mouse.Pi - angleToCenter) + Mouse.Pi / 2)
if angleToCenter < Mouse.Pi and angleToCenter > Mouse.Pi / 4:
# Rotate left.
self.angle += [-0.25, 0.25][self.angle < -Mouse.Pi / 2]
elif angleToCenter >= Mouse.Pi and angleToCenter < (Mouse.Pi + Mouse.Pi / 2 + Mouse.Pi / 4):
# Rotate right.
self.angle += [-0.25, 0.25][self.angle < Mouse.Pi / 2]
elif math.sin(self.angle) < 0:
self.angle += 0.25
elif math.sin(self.angle) > 0:
self.angle -= 0.25
# Try not to crash with any other mice.
dangerMice = self.scene().items(QtGui.QPolygonF([self.mapToScene(0, 0),
self.mapToScene(-30, -50),
self.mapToScene(30, -50)]))
for item in dangerMice:
if item is self:
continue
lineToMouse = QtCore.QLineF(QtCore.QPointF(0, 0), self.mapFromItem(item, 0, 0))
angleToMouse = math.acos(lineToMouse.dx() / lineToMouse.length())
if lineToMouse.dy() < 0:
angleToMouse = Mouse.TwoPi - angleToMouse
angleToMouse = Mouse.normalizeAngle((Mouse.Pi - angleToMouse) + Mouse.Pi / 2)
if angleToMouse >= 0 and angleToMouse < Mouse.Pi / 2:
# Rotate right.
self.angle += 0.5
elif angleToMouse <= Mouse.TwoPi and angleToMouse > (Mouse.TwoPi - Mouse.Pi / 2):
# Rotate left.
self.angle -= 0.5
# Add some random movement.
if len(dangerMice) > 1 and (QtCore.qrand() % 10) == 0:
if QtCore.qrand() % 1:
self.angle += (QtCore.qrand() % 100) / 500.0
else:
self.angle -= (QtCore.qrand() % 100) / 500.0
self.speed += (-50 + QtCore.qrand() % 100) / 100.0
dx = math.sin(self.angle) * 10
self.mouseEyeDirection = [dx / 5, 0.0][QtCore.qAbs(dx / 5) < 1]
self.rotate(dx)
self.setPos(self.mapToParent(0, -(3 + math.sin(self.speed) * 3)))
if __name__ == '__main__':
import sys
MouseCount = 7
app = QtGui.QApplication(sys.argv)
QtCore.qsrand(QtCore.QTime(0,0,0).secsTo(QtCore.QTime.currentTime()))
scene = QtGui.QGraphicsScene()
scene.setSceneRect(-300, -300, 600, 600)
scene.setItemIndexMethod(QtGui.QGraphicsScene.NoIndex)
for i in range(MouseCount):
mouse = Mouse()
mouse.setPos(math.sin((i * 6.28) / MouseCount) * 200,
math.cos((i * 6.28) / MouseCount) * 200)
scene.addItem(mouse)
view = QtGui.QGraphicsView(scene)
view.setRenderHint(QtGui.QPainter.Antialiasing)
view.setBackgroundBrush(QtGui.QBrush(QtGui.QPixmap(':/images/cheese.jpg')))
view.setCacheMode(QtGui.QGraphicsView.CacheBackground)
view.setViewportUpdateMode(QtGui.QGraphicsView.BoundingRectViewportUpdate)
view.setDragMode(QtGui.QGraphicsView.ScrollHandDrag)
view.setWindowTitle("Colliding Mice")
view.resize(400, 300)
view.show()
sys.exit(app.exec_())
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