lib/python/Components/ScrollLabel.py

   1 import skin
   2 from HTMLComponent import HTMLComponent
   3 from GUIComponent import GUIComponent
   4 from enigma import eLabel, eWidget, eSlider, fontRenderClass, ePoint, eSize
   5
   6 class ScrollLabel(HTMLComponent, GUIComponent):
   7         def __init__(self, text=""):
   8                 GUIComponent.__init__(self)
   9                 self.message = text
  10                 self.instance = None
  11                 self.long_text = None
  12                 self.scrollbar = None
  13                 self.pages = None
  14                 self.total = None
  15
  16         def applySkin(self, desktop):
  17                 ret = False
  18                 if self.skinAttributes is not None:
  19                         skin.applyAllAttributes(self.long_text, desktop, self.skinAttributes)
  20                         attribs = [ ]
  21                         for (attrib, value) in self.skinAttributes:
  22                                 if attrib.find("Color") != -1 or attrib.find("transparent") != -1:
  23                                         attribs.append((attrib,value))
  24                         skin.applyAllAttributes(self.instance, desktop, attribs)
  25                         skin.applyAllAttributes(self.scrollbar, desktop, attribs)
  26                         ret = True
  27                 s = self.long_text.size()
  28                 self.instance.move(self.long_text.position())
  29                 lineheight=fontRenderClass.getInstance().getLineHeight( self.long_text.getFont() )
  30                 lines = (int)(s.height() / lineheight)
  31                 self.pageHeight = (int)(lines * lineheight)
  32                 self.instance.resize(eSize(s.width(), self.pageHeight+(int)(lineheight/6)))
  33                 self.scrollbar.move(ePoint(s.width()-20,0))
  34                 self.scrollbar.resize(eSize(20,self.pageHeight+(int)(lineheight/6)))
  35                 self.scrollbar.setOrientation(eSlider.orVertical);
  36                 self.scrollbar.setRange(0,100)
  37                 self.scrollbar.setBorderWidth(1)
  38                 self.long_text.move(ePoint(0,0))
  39                 self.long_text.resize(eSize(s.width()-30, self.pageHeight*16))
  40                 self.setText(self.message)
  41                 return ret
  42
  43         def setText(self, text):
  44                 self.message = text
  45                 if self.long_text is not None and self.pageHeight:
  46                         self.long_text.move(ePoint(0,0))
  47                         self.long_text.setText(self.message)
  48                         text_height=self.long_text.calculateSize().height()
  49                         total=self.pageHeight
  50                         pages=1
  51                         while total < text_height:
  52                                 total=total+self.pageHeight
  53                                 pages=pages+1
  54                         if pages > 1:
  55                                 self.scrollbar.show()
  56                                 self.total = total
  57                                 self.pages = pages
  58                                 self.updateScrollbar()
  59                         else:
  60                                 self.scrollbar.hide()
  61                                 self.total = None
  62                                 self.pages = None
  63
  64         def appendText(self, text):
  65                 old_text = self.getText()
  66                 if len(str(old_text)) >0:
  67                         self.message += text
  68                 else:
  69                         self.message = text
  70                 if self.long_text is not None:
  71                         self.long_text.setText(self.message)
  72                         text_height=self.long_text.calculateSize().height()
  73                         total=self.pageHeight
  74                         pages=1
  75                         while total < text_height:
  76                                 total=total+self.pageHeight
  77                                 pages=pages+1
  78                         if pages > 1:
  79                                 self.scrollbar.show()
  80                                 self.total = total
  81                                 self.pages = pages
  82                                 self.updateScrollbar()
  83                         else:
  84                                 self.scrollbar.hide()
  85                                 self.total = None
  86                                 self.pages = None
  87
  88         def updateScrollbar(self):
  89                 start = -self.long_text.position().y() * 100 / self.total
  90                 vis = self.pageHeight * 100 / self.total;
  91                 self.scrollbar.setStartEnd(start, start+vis)
  92
  93         def getText(self):
  94                 return self.message
  95
  96         def GUIcreate(self, parent):
  97                 self.instance = eWidget(parent)
  98                 self.scrollbar = eSlider(self.instance)
  99                 self.long_text = eLabel(self.instance)
 100
 101         def GUIdelete(self):
 102                 self.long_text = None
 103                 self.scrollbar = None
 104                 self.instance = None
 105
 106         def pageUp(self):
 107                 if self.total is not None:
 108                         curPos = self.long_text.position()
 109                         if curPos.y() < 0:
 110                                 self.long_text.move( ePoint( curPos.x(), curPos.y() + self.pageHeight ) )
 111                                 self.updateScrollbar()
 112
 113         def pageDown(self):
 114                 if self.total is not None:
 115                         curPos = self.long_text.position()
 116                         if self.total-self.pageHeight >= abs( curPos.y() - self.pageHeight ):
 117                                 self.long_text.move( ePoint( curPos.x(), curPos.y() - self.pageHeight ) )
 118                                 self.updateScrollbar()
 119
 120         def lastPage(self):
 121                 i=1
 122                 while i < self.pages:
 123                         self.pageDown()
 124                         i += 1
 125                         self.updateScrollbar()
 126
 127         def produceHTML(self):
 128                 return self.getText()