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