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#############################################################################
##
## Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
## Contact: Qt Software Information (qt-info@nokia.com)
##
## This file is part of the Graphics Dojo project on Qt Labs.
##
## This file may be used under the terms of the GNU General Public
## License version 2.0 or 3.0 as published by the Free Software Foundation
## and appearing in the file LICENSE.GPL included in the packaging of
## this file. Please review the following information to ensure GNU
## General Public Licensing requirements will be met:
## http://www.fsf.org/licensing/licenses/info/GPLv2.html and
## http://www.gnu.org/copyleft/gpl.html.
##
## If you are unsure which license is appropriate for your use, please
## contact the sales department at qt-sales@nokia.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 sys
from PyQt4.QtCore import *
from PyQt4.QtGui import *
from PyQt4.QtNetwork import *
from PyQt4.QtScript import *
try:
import qsmonster_rc
except ImportError:
sys.stderr.write(
"Please process the qsmonster.qrc file before running this program. "
"For example with:\n\n"
"pyrcc4 -o qsmonster_rc.py qsmonster.qrc\n\n"
)
sys.exit(1)
MONSTER_JS_URL = "http://deanm.github.com/pre3d/monster.js"
class PaintCommand:
def __init__(self, opacity = 0.0, stroke = QPen(),
fill = QBrush(), polygon = QPolygonF()):
self.opacity = opacity
self.stroke = stroke
self.fill = fill
self.polygon = polygon
def parseColor(name):
if name == "none":
return QColor()
name = str(name)
if name.startswith("rgba("):
start = name.find('(')
end = name.rfind(')')
if end != -1:
substr = name[start+1:-1]
colors = map(float, substr.split(','))
if len(colors) == 4:
colors[3] = max(0, colors[3] * 255)
return QColor(*colors)
return QColor(name)
class QSMonster(QWidget):
def __init__(self, parent = None):
QWidget.__init__(self, parent)
self.commandBuffer = []
self.fps = 0
self.frameTick = QTime()
self.totalFrame = 0
self.engine = QScriptEngine(self)
self.engine.globalObject().setProperty("drawPolygons",
self.engine.newFunction(self.drawPolygons, 2))
self.manager = QNetworkAccessManager(self)
self.connect(self.manager, SIGNAL("finished(QNetworkReply*)"),
self.start)
url = QUrl(MONSTER_JS_URL)
reply = self.manager.get(QNetworkRequest(url))
self.connect(reply, SIGNAL("downloadProgress(qint64, qint64)"),
self.progress)
self.setWindowTitle(self.tr("About to download %1").arg(MONSTER_JS_URL))
def progress(self, received, total):
percent = received * 100 / total
self.setWindowTitle(self.tr("Downloading %1: %2%").arg(MONSTER_JS_URL).arg(percent))
def start(self, networkReply):
url = networkReply.url()
if networkReply.error():
self.setWindowTitle(self.tr("Can't download %1: %2").arg(
url.toString()).arg(networkReply.errorString()))
else:
self.setWindowTitle(self.tr("Monster Evolution in Qt"))
self.setAttribute(Qt.WA_OpaquePaintEvent, True)
file = QFile()
file.setFileName(":/magic.js")
file.open(QIODevice.ReadOnly)
magicCode = QString(file.readAll())
file.close()
self.engine.evaluate(magicCode)
scriptCode = QString(networkReply.readAll())
# Qt Script parser does not accept this
if QT_VERSION < 0x040500:
scriptCode.replace(",}", "}")
else:
scriptCode.replace("break}", "break;}")
scriptCode.replace("continue}", "continue;}")
self.engine.evaluate(scriptCode)
self.engine.evaluate("window.onLoad()")
self.startTimer(33)
networkReply.deleteLater()
def timerEvent(self, event):
self.engine.evaluate("window.onTimer()")
def paintEvent(self, event):
p = QPainter(self)
p.setRenderHint(QPainter.Antialiasing, True)
for cmd in self.commandBuffer:
p.setPen(cmd.stroke)
p.setOpacity(cmd.opacity)
p.setBrush(cmd.fill)
p.drawPolygon(cmd.polygon)
p.setPen(Qt.white)
p.drawText(10, 600 - 20, QString("%1 FPS").arg(self.fps))
def drawPolygons(self, context, engine):
polygonCount = context.argument(0).toInt32()
polygonBuffer = context.argument(1)
extra = polygonCount - len(self.commandBuffer)
if extra > 0:
self.commandBuffer += [None] * extra
elif extra < 0:
self.commandBuffer = self.commandBuffer[:polygonCount]
c = 0
while c < polygonCount:
cmd = polygonBuffer.property(c)
alpha = cmd.property(0).toNumber()
strokeColor = cmd.property(1).toString()
fillColor = cmd.property(2).toString()
pointCount = cmd.property(3).toInt32()
pointArray = cmd.property(4)
polygon = QPolygonF(pointCount / 2)
p = 0
while p < pointCount / 2:
polygon[p] = QPointF(pointArray.property(2 * p).toNumber(),
pointArray.property(2 * p + 1).toNumber())
p += 1
paint = self.commandBuffer[c]
if not paint:
paint = self.commandBuffer[c] = PaintCommand()
paint.opacity = alpha
if strokeColor != "none":
paint.stroke.setStyle(Qt.SolidLine)
paint.stroke.setColor(parseColor(strokeColor))
else:
paint.stroke = QPen(Qt.NoPen)
if fillColor != "none":
paint.fill = QBrush(parseColor(fillColor))
else:
paint.fill = QBrush(Qt.NoBrush)
paint.polygon = polygon
c += 1
self.update()
if self.totalFrame % 15 == 0:
elapsed = self.frameTick.elapsed()
self.frameTick.start()
self.fps = 16 * 1000 / (1 + elapsed)
self.totalFrame += 1
return QScriptValue()
if __name__ == "__main__":
app = QApplication(sys.argv)
qsmonster = QSMonster()
qsmonster.setFixedSize(800, 600)
qsmonster.show()
sys.exit(app.exec_())
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