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from PyQt4 import QtCore, QtGui, QtXml
from colors import Colors
from demoitem import DemoItem
from demoitemanimation import DemoItemAnimation
from demotextitem import DemoTextItem
from headingitem import HeadingItem
from imageitem import ImageItem
class ExampleContent(DemoItem):
def __init__(self, name, scene=None, parent=None):
super(ExampleContent, self).__init__(scene, parent)
# Prevent a circular import.
from menumanager import MenuManager
self._menu_manager = MenuManager.instance()
self.name = name
self.heading = None
self.description = None
self.screenshot = None
def prepare(self):
if not self.prepared:
self.prepared = True
self.createContent()
def animationStopped(self, id):
if id == DemoItemAnimation.ANIM_OUT:
# Free up some memory.
self.heading = None
self.description = None
self.screenshot = None
self.prepared = False
def loadDescription(self):
ba = self._menu_manager.getHtml(self.name)
exampleDoc = QtXml.QDomDocument()
exampleDoc.setContent(ba, False)
paragraphs = exampleDoc.elementsByTagName('p')
if paragraphs.length() < 1:
Colors.debug("- ExampleContent.loadDescription(): Could not load description:", self._menu_manager.info[self.name].get('docfile'))
description = Colors.contentColor + "Could not load description. Ensure that the documentation for Qt is built."
for p in range(paragraphs.length()):
description = self.extractTextFromParagraph(paragraphs.item(p))
if self.isSummary(description):
break
return Colors.contentColor + description
def isSummary(self, text):
re = QtCore.QRegExp("(In )?((The|This) )?(%s )?.*(tutorial|example|demo|application)" % self.name, QtCore.Qt.CaseInsensitive)
return ('[' not in text) and (re.indexIn(text) >= 0)
def extractTextFromParagraph(self, parentNode):
description = ''
node = parentNode.firstChild()
while not node.isNull():
if node.isText():
description += Colors.contentColor + node.nodeValue()
elif node.hasChildNodes():
if node.nodeName() == 'b':
beginTag = '<b>'
endTag = '</b>'
elif node.nodeName() == 'a':
beginTag = Colors.contentColor
endTag = '</font>'
elif node.nodeName() == 'i':
beginTag = '<i>'
endTag = '</i>'
elif node.nodeName() == 'tt':
beginTag = '<tt>'
endTag = '</tt>'
else:
beginTag = endTag = ''
description += beginTag + self.extractTextFromParagraph(node) + endTag
node = node.nextSibling()
return description
def createContent(self):
# Create the items.
self.heading = HeadingItem(self.name, self.scene(), self)
self.description = DemoTextItem(self.loadDescription(),
Colors.contentFont(), Colors.heading, 500, self.scene(), self)
imgHeight = 340 - int(self.description.boundingRect().height()) + 50
self.screenshot = ImageItem(QtGui.QImage.fromData(self._menu_manager.getImage(self.name)), 550, imgHeight, self.scene(), self)
# Place the items on screen.
self.heading.setPos(0, 3)
self.description.setPos(0, self.heading.pos().y() + self.heading.boundingRect().height() + 10)
self.screenshot.setPos(0, self.description.pos().y() + self.description.boundingRect().height() + 10)
def boundingRect(self):
return QtCore.QRectF(0, 0, 500, 100)
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