Source Code for Module node_manager_fkie.html_delegate

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 32   
 33  from python_qt_binding import QtGui 
 34  from python_qt_binding import QtCore 
 35   
 36  import rospy 
 37  from rosgraph.names import is_legal_name 
 38   
 39   
 40 -class HTMLDelegate(QtGui.QStyledItemDelegate): 
 41    ''' 
 42    A class to display the HTML text in QTreeView. 
 43    ''' 
 44     
 45 -  def paint(self, painter, option, index): 
 46      ''' 
 47      Use the QTextDokument to represent the HTML text. 
 48      @see: U{http://www.pyside.org/docs/pyside/PySide/QtGui/QAbstractItemDelegate.html#PySide.QtGui.QAbstractItemDelegate} 
 49      ''' 
 50      options = QtGui.QStyleOptionViewItemV4(option) 
 51      self.initStyleOption(options, index) 
 52   
 53      style = QtGui.QApplication.style() if options.widget is None else options.widget.style() 
 54   
 55      doc = QtGui.QTextDocument() 
 56      doc.setHtml(self.toHTML(options.text)) 
 57      doc.setTextWidth(option.rect.width()) 
 58   
 59      options.text = '' 
 60      style.drawControl(QtGui.QStyle.CE_ItemViewItem, options, painter); 
 61   
 62      ctx = QtGui.QAbstractTextDocumentLayout.PaintContext() 
 63   
 64      #Highlighting text if item is selected 
 65      #if (optionV4.state and QStyle::State_Selected): 
 66      #  ctx.palette.setColor(QPalette::Text, optionV4.palette.color(QPalette::Active, QPalette::HighlightedText)); 
 67   
 68      textRect = style.subElementRect(QtGui.QStyle.SE_ItemViewItemText, options, options.widget) 
 69      painter.save() 
 70      painter.translate(QtCore.QPoint(textRect.topLeft().x(), textRect.topLeft().y()-3)) 
 71      painter.setClipRect(textRect.translated(-textRect.topLeft())) 
 72      doc.documentLayout().draw(painter, ctx) 
 73   
 74      painter.restore() 
 75   
 76 -  def sizeHint(self, option, index): 
 77      ''' 
 78      Determines and returns the size of the text after the format. 
 79      @see: U{http://www.pyside.org/docs/pyside/PySide/QtGui/QAbstractItemDelegate.html#PySide.QtGui.QAbstractItemDelegate} 
 80      ''' 
 81      options = QtGui.QStyleOptionViewItemV4(option) 
 82      self.initStyleOption(options,index) 
 83   
 84      doc = QtGui.QTextDocument() 
 85      doc.setHtml(options.text) 
 86      doc.setTextWidth(options.rect.width()) 
 87      metric = QtGui.QFontMetrics(doc.defaultFont()) 
 88      return QtCore.QSize(doc.idealWidth(), metric.height()+4) 
 89   
 90    @classmethod 
 91 -  def toHTML(cls, text): 
 92      ''' 
 93      Creates a HTML representation of the topic name. 
 94      @param topic_name: the topic name 
 95      @type topic_name: C{str} 
 96      @return: the HTML representation of the topic name 
 97      @rtype: C{str} 
 98      ''' 
 99      if text.rfind('@') > 0: # handle host names 
100        name, sep, host = text.rpartition('@') 
101        result = '' 
102        if sep: 
103          result = ''.join(['<div>', name, '<span style="color:gray;">', sep, host, '</span></div>']) 
104        else: 
105          result = group_name 
106      elif text.find('{') > -1: # handle group names  
107        text = text.strip('{}') 
108        ns, sep, name = text.rpartition('/') 
109        result = '' 
110        if sep: 
111          result = ''.join(['<div>', '<b>{</b><span style="color:gray;">', ns, sep, '</span><b>', name, '}</b></div>']) 
112        else: 
113          result = ''.join(['<div>', '<b>{', name, '}</b></div>']) 
114      elif not is_legal_name(text): # handle all invalid names (used space in the name) 
115        ns, sep, name = text.rpartition('/') 
116        result = '' 
117        if sep: 
118          result = ''.join(['<div>', '<span style="color:#CC0000;">', str(ns), sep, '<b>', name, '</b></span></div>']) 
119        else: 
120          result = ''.join(['<div>', '<span style="color:#CC0000;">', name, '</span></div>']) 
121      else: # handle all ROS names 
122        ns, sep, name = text.rpartition('/') 
123        result = '' 
124        if sep: 
125          result = ''.join(['<div>', '<span style="color:gray;">', str(ns), sep, '</span><b>', name, '</b></div>']) 
126        else: 
127          result = name 
128      return result 
129