Source Code for Module node_manager_fkie.html_delegate

  1  # Software License Agreement (BSD License) 
  2  # 
  3  # Copyright (c) 2012, Fraunhofer FKIE/US, Alexander Tiderko 
  4  # All rights reserved. 
  5  # 
  6  # Redistribution and use in source and binary forms, with or without 
  7  # modification, are permitted provided that the following conditions 
  8  # are met: 
  9  # 
 10  #  * Redistributions of source code must retain the above copyright 
 11  #    notice, this list of conditions and the following disclaimer. 
 12  #  * Redistributions in binary form must reproduce the above 
 13  #    copyright notice, this list of conditions and the following 
 14  #    disclaimer in the documentation and/or other materials provided 
 15  #    with the distribution. 
 16  #  * Neither the name of Fraunhofer nor the names of its 
 17  #    contributors may be used to endorse or promote products derived 
 18  #    from this software without specific prior written permission. 
 19  # 
 20  # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
 21  # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
 22  # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 
 23  # FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 
 24  # COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 
 25  # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 
 26  # BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 
 27  # LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 
 28  # CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
 29  # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 
 30  # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
 31  # POSSIBILITY OF SUCH DAMAGE. 
 32   
 33  from python_qt_binding import QtGui 
 34  from python_qt_binding import QtCore 
 35   
 36  from rosgraph.names import is_legal_name 
 37   
 38   
 39 -class HTMLDelegate(QtGui.QStyledItemDelegate): 
 40    ''' 
 41    A class to display the HTML text in QTreeView. 
 42    ''' 
 43     
 44 -  def paint(self, painter, option, index): 
 45      ''' 
 46      Use the QTextDokument to represent the HTML text. 
 47      @see: U{http://www.pyside.org/docs/pyside/PySide/QtGui/QAbstractItemDelegate.html#PySide.QtGui.QAbstractItemDelegate} 
 48      ''' 
 49      options = QtGui.QStyleOptionViewItemV4(option) 
 50      self.initStyleOption(options, index) 
 51   
 52      style = QtGui.QApplication.style() if options.widget is None else options.widget.style() 
 53   
 54      doc = QtGui.QTextDocument() 
 55      doc.setHtml(self.toHTML(options.text)) 
 56      doc.setTextWidth(option.rect.width()) 
 57   
 58      options.text = '' 
 59      style.drawControl(QtGui.QStyle.CE_ItemViewItem, options, painter); 
 60   
 61      ctx = QtGui.QAbstractTextDocumentLayout.PaintContext() 
 62   
 63      #Highlighting text if item is selected 
 64      #if (optionV4.state and QStyle::State_Selected): 
 65      #  ctx.palette.setColor(QPalette::Text, optionV4.palette.color(QPalette::Active, QPalette::HighlightedText)); 
 66   
 67      textRect = style.subElementRect(QtGui.QStyle.SE_ItemViewItemText, options, options.widget) 
 68      painter.save() 
 69      painter.translate(QtCore.QPoint(textRect.topLeft().x(), textRect.topLeft().y()-3)) 
 70      painter.setClipRect(textRect.translated(-textRect.topLeft())) 
 71      doc.documentLayout().draw(painter, ctx) 
 72   
 73      painter.restore() 
 74   
 75 -  def sizeHint(self, option, index): 
 76      ''' 
 77      Determines and returns the size of the text after the format. 
 78      @see: U{http://www.pyside.org/docs/pyside/PySide/QtGui/QAbstractItemDelegate.html#PySide.QtGui.QAbstractItemDelegate} 
 79      ''' 
 80      options = QtGui.QStyleOptionViewItemV4(option) 
 81      self.initStyleOption(options,index) 
 82   
 83      doc = QtGui.QTextDocument() 
 84      doc.setHtml(options.text) 
 85      doc.setTextWidth(options.rect.width()) 
 86      metric = QtGui.QFontMetrics(doc.defaultFont()) 
 87      return QtCore.QSize(doc.idealWidth(), metric.height()+4) 
 88   
 89    @classmethod 
 90 -  def toHTML(cls, text): 
 91      ''' 
 92      Creates a HTML representation of the topic name. 
 93      @param topic_name: the topic name 
 94      @type topic_name: C{str} 
 95      @return: the HTML representation of the topic name 
 96      @rtype: C{str} 
 97      ''' 
 98      if text.rfind('@') > 0: # handle host names 
 99        name, sep, host = text.rpartition('@') 
100        result = '' 
101        if sep: 
102          result = '<div>%s<span style="color:gray;">%s%s</span></div>'%(name, sep, host) 
103        else: 
104          result = text 
105      elif text.find('{') > -1: # handle group names  
106        text = text.strip('{}') 
107        ns, sep, name = text.rpartition('/') 
108        result = '' 
109        if sep: 
110          result = '<div><b>{</b><span style="color:gray;">%s%s</span><b>%s}</b></div>'%(ns, sep, name) 
111        else: 
112          result = '<div><b>{%s}</b></div>'%(name) 
113      elif not is_legal_name(text): # handle all invalid names (used space in the name) 
114        ns, sep, name = text.rpartition('/') 
115        result = '' 
116        if sep: 
117          result = '<div><span style="color:#FF6600;">%s%s<b>%s</b></span></div>'%(ns, sep, name) 
118        else: 
119          result = '<div><span style="color:#FF6600;">%s</span></div>'%(name) 
120      else: # handle all ROS names 
121        ns, sep, name = text.rpartition('/') 
122        result = '' 
123        if sep: 
124          result = '<div><span style="color:gray;">%s%s</span><b>%s</b></div>'%(ns, sep, name) 
125        else: 
126          result = name 
127      return result 
128