Source Code for Module node_manager_fkie.html_delegate

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  3  # Copyright (c) 2012, Fraunhofer FKIE/US, Alexander Tiderko 
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 32   
 33  from python_qt_binding.QtCore import QPoint, QSize 
 34  from python_qt_binding.QtGui import QAbstractTextDocumentLayout, QFontMetrics, QTextDocument 
 35  try: 
 36      from python_qt_binding.QtGui import QApplication, QStyledItemDelegate, QStyle 
 37      from python_qt_binding.QtGui import QStyleOptionViewItemV4 as QStyleOptionViewItem 
 38  except: 
 39      from python_qt_binding.QtWidgets import QApplication, QStyledItemDelegate, QStyle 
 40      from python_qt_binding.QtWidgets import QStyleOptionViewItem 
 41   
 42  from rosgraph.names import is_legal_name 
 43   
 44   
 45 -class HTMLDelegate(QStyledItemDelegate): 
 46      ''' 
 47      A class to display the HTML text in QTreeView. 
 48      ''' 
 49   
 50 -    def paint(self, painter, option, index): 
 51          ''' 
 52          Use the QTextDokument to represent the HTML text. 
 53          @see: U{http://www.pyside.org/docs/pyside/PySide/QtGui/QAbstractItemDelegate.html#PySide.QtGui.QAbstractItemDelegate} 
 54          ''' 
 55          options = QStyleOptionViewItem(option) 
 56          self.initStyleOption(options, index) 
 57   
 58          style = QApplication.style() if options.widget is None else options.widget.style() 
 59   
 60          doc = QTextDocument() 
 61          doc.setHtml(self.toHTML(options.text)) 
 62          doc.setTextWidth(option.rect.width()) 
 63   
 64          options.text = '' 
 65          style.drawControl(QStyle.CE_ItemViewItem, options, painter) 
 66   
 67          ctx = QAbstractTextDocumentLayout.PaintContext() 
 68   
 69          # Highlighting text if item is selected 
 70          # if (optionV4.state and QStyle::State_Selected): 
 71          #  ctx.palette.setColor(QPalette::Text, optionV4.palette.color(QPalette::Active, QPalette::HighlightedText)); 
 72   
 73          textRect = style.subElementRect(QStyle.SE_ItemViewItemText, options, options.widget) 
 74          painter.save() 
 75          painter.translate(QPoint(textRect.topLeft().x(), textRect.topLeft().y() - 3)) 
 76          painter.setClipRect(textRect.translated(-textRect.topLeft())) 
 77          doc.documentLayout().draw(painter, ctx) 
 78   
 79          painter.restore() 
 80   
 81 -    def sizeHint(self, option, index): 
 82          ''' 
 83          Determines and returns the size of the text after the format. 
 84          @see: U{http://www.pyside.org/docs/pyside/PySide/QtGui/QAbstractItemDelegate.html#PySide.QtGui.QAbstractItemDelegate} 
 85          ''' 
 86          options = QStyleOptionViewItem(option) 
 87          self.initStyleOption(options, index) 
 88   
 89          doc = QTextDocument() 
 90          doc.setHtml(options.text) 
 91          doc.setTextWidth(options.rect.width()) 
 92          metric = QFontMetrics(doc.defaultFont()) 
 93          return QSize(doc.idealWidth(), metric.height() + 4) 
 94   
 95      @classmethod 
 96 -    def toHTML(cls, text): 
 97          ''' 
 98          Creates a HTML representation of the given text. It could be a node, topic service or group name. 
 99          @param text: a name with ROS representation 
100          @type text: C{str} 
101          @return: the HTML representation of the given name 
102          @rtype: C{str} 
103          ''' 
104          if text.rfind('@') > 0:  # handle host names 
105              name, sep, host = text.rpartition('@') 
106              result = '' 
107              if sep: 
108                  result = '<div>%s<span style="color:gray;">%s%s</span></div>' % (name, sep, host) 
109              else: 
110                  result = text 
111          elif text.find('{') > -1:  # handle group names 
112              text = text.strip('{}') 
113              ns, sep, name = text.rpartition('/') 
114              result = '' 
115              if sep: 
116                  result = '<div><b>{</b><span style="color:gray;">%s%s</span><b>%s}</b></div>' % (ns, sep, name) 
117              else: 
118                  result = '<div><b>{%s}</b></div>' % (name) 
119          elif not is_legal_name(text):  # handle all invalid names (used space in the name) 
120              ns, sep, name = text.rpartition('/') 
121              result = '' 
122              if sep: 
123                  result = '<div><span style="color:#FF6600;">%s%s<b>%s</b></span></div>' % (ns, sep, name) 
124              else: 
125                  result = '<div><span style="color:#FF6600;">%s</span></div>' % (name) 
126          else:  # handle all ROS names 
127              ns, sep, name = text.rpartition('/') 
128              result = '' 
129              if sep: 
130                  result = '<div><span style="color:gray;">%s%s</span><b>%s</b></div>' % (ns, sep, name) 
131              else: 
132                  result = name 
133          return result 
134