lib/python/Components/ScrollLabel.py

   1 import skin
   2 from HTMLComponent import *
   3 from GUIComponent import *
   4 from enigma import eLabel, eWidget, eSlider, fontRenderClass, ePoint, eSize
   5
   6 class ScrollLabel(HTMLComponent, GUIComponent):
   7         def __init__(self, text=""):
   8                 self.message = text
   9                 self.instance = None
  10                 self.long_text = None
  11                 self.scrollbar = None
  12                 self.pages = None
  13                 self.total = None
  14
  15         def applySkin(self, desktop):
  16                 skin.applyAllAttributes(self.long_text, desktop, self.skinAttributes)
  17                 s = self.long_text.size()
  18                 self.instance.move(self.long_text.position())
  19                 self.scrollbar.move(ePoint(s.width()-20,0))
  20                 self.scrollbar.resize(eSize(20,s.height()))
  21                 self.scrollbar.setOrientation(eSlider.orVertical);
  22                 self.scrollbar.setRange(0,100)
  23                 lineheight=fontRenderClass.getInstance().getLineHeight( self.long_text.getFont() )
  24                 lines = (int)(s.height() / lineheight)
  25                 self.pageHeight = (int)(lines * lineheight)
  26                 self.instance.resize(eSize(s.width(), self.pageHeight+(int)(lineheight/6)))
  27                 self.long_text.move(ePoint(0,0))
  28                 self.long_text.resize(eSize(s.width()-30, self.pageHeight*16))
  29                 self.setText(self.message)
  30
  31         def setText(self, text):
  32                 self.message = text
  33                 if self.long_text is not None:
  34                         self.long_text.move(ePoint(0,0))
  35                         self.long_text.setText(self.message)
  36                         text_height=self.long_text.calculateSize().height()
  37                         total=self.pageHeight
  38                         pages=1
  39                         while total < text_height:
  40                                 total=total+self.pageHeight
  41                                 pages=pages+1
  42                         if pages > 1:
  43                                 self.scrollbar.show()
  44                                 self.total = total
  45                                 self.pages = pages
  46                                 self.updateScrollbar()
  47                         else:
  48                                 self.scrollbar.hide()
  49                                 self.total = None
  50                                 self.pages = None
  51
  52         def updateScrollbar(self):
  53                 start = -self.long_text.position().y() * 100 / self.total
  54                 vis = self.pageHeight * 100 / self.total;
  55                 self.scrollbar.setStartEnd(start, start+vis)
  56
  57         def getText(self):
  58                 return self.message
  59
  60         def GUIcreate(self, parent):
  61                 self.instance = eWidget(parent)
  62                 self.scrollbar = eSlider(self.instance)
  63                 self.long_text = eLabel(self.instance)
  64
  65         def GUIdelete(self):
  66                 self.long_text = None
  67                 self.scrollbar = None
  68                 self.instance = None
  69
  70         def pageUp(self):
  71                 if self.total is not None:
  72                         curPos = self.long_text.position()
  73                         if curPos.y() < 0:
  74                                 self.long_text.move( ePoint( curPos.x(), curPos.y() + self.pageHeight ) )
  75                                 self.updateScrollbar()
  76
  77         def pageDown(self):
  78                 if self.total is not None:
  79                         curPos = self.long_text.position()
  80                         if self.total-self.pageHeight >= abs( curPos.y() - self.pageHeight ):
  81                                 self.long_text.move( ePoint( curPos.x(), curPos.y() - self.pageHeight ) )
  82                                 self.updateScrollbar()
  83
  84         def produceHTML(self):
  85                 return self.getText()