code.vuplus.com Git - vuplus_dvbapp/blob - 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                 skin.applyAllAttributes(self.long_text, desktop, self.skinAttributes)
  18                 s = self.long_text.size()
  19                 self.instance.move(self.long_text.position())
  20                 lineheight=fontRenderClass.getInstance().getLineHeight( self.long_text.getFont() )
  21                 lines = (int)(s.height() / lineheight)
  22                 self.pageHeight = (int)(lines * lineheight)
  23                 self.instance.resize(eSize(s.width(), self.pageHeight+(int)(lineheight/6)))
  24                 self.scrollbar.move(ePoint(s.width()-20,0))
  25                 self.scrollbar.resize(eSize(20,self.pageHeight+(int)(lineheight/6)))
  26                 self.scrollbar.setOrientation(eSlider.orVertical);
  27                 self.scrollbar.setRange(0,100)
  28                 self.scrollbar.setBorderWidth(1)
  29                 self.long_text.move(ePoint(0,0))
  30                 self.long_text.resize(eSize(s.width()-30, self.pageHeight*16))
  31                 self.setText(self.message)
  32
  33         def setText(self, text):
  34                 self.message = text
  35                 if self.long_text is not None:
  36                         self.long_text.move(ePoint(0,0))
  37                         self.long_text.setText(self.message)
  38                         text_height=self.long_text.calculateSize().height()
  39                         total=self.pageHeight
  40                         pages=1
  41                         while total < text_height:
  42                                 total=total+self.pageHeight
  43                                 pages=pages+1
  44                         if pages > 1:
  45                                 self.scrollbar.show()
  46                                 self.total = total
  47                                 self.pages = pages
  48                                 self.updateScrollbar()
  49                         else:
  50                                 self.scrollbar.hide()
  51                                 self.total = None
  52                                 self.pages = None
  53
  54         def appendText(self, text):
  55                 old_text = self.getText()
  56                 if len(str(old_text)) >0:
  57                         self.message += text
  58                 else:
  59                         self.message = text
  60                 if self.long_text is not None:
  61                         self.long_text.setText(self.message)
  62                         text_height=self.long_text.calculateSize().height()
  63                         total=self.pageHeight
  64                         pages=1
  65                         while total < text_height:
  66                                 total=total+self.pageHeight
  67                                 pages=pages+1
  68                         if pages > 1:
  69                                 self.scrollbar.show()
  70                                 self.total = total
  71                                 self.pages = pages
  72                                 self.updateScrollbar()
  73                         else:
  74                                 self.scrollbar.hide()
  75                                 self.total = None
  76                                 self.pages = None
  77
  78         def updateScrollbar(self):
  79                 start = -self.long_text.position().y() * 100 / self.total
  80                 vis = self.pageHeight * 100 / self.total;
  81                 self.scrollbar.setStartEnd(start, start+vis)
  82
  83         def getText(self):
  84                 return self.message
  85
  86         def GUIcreate(self, parent):
  87                 self.instance = eWidget(parent)
  88                 self.scrollbar = eSlider(self.instance)
  89                 self.long_text = eLabel(self.instance)
  90
  91         def GUIdelete(self):
  92                 self.long_text = None
  93                 self.scrollbar = None
  94                 self.instance = None
  95
  96         def pageUp(self):
  97                 if self.total is not None:
  98                         curPos = self.long_text.position()
  99                         if curPos.y() < 0:
 100                                 self.long_text.move( ePoint( curPos.x(), curPos.y() + self.pageHeight ) )
 101                                 self.updateScrollbar()
 102
 103         def pageDown(self):
 104                 if self.total is not None:
 105                         curPos = self.long_text.position()
 106                         if self.total-self.pageHeight >= abs( curPos.y() - self.pageHeight ):
 107                                 self.long_text.move( ePoint( curPos.x(), curPos.y() - self.pageHeight ) )
 108                                 self.updateScrollbar()
 109
 110         def lastPage(self):
 111                 i=1
 112                 while i < self.pages:
 113                         self.pageDown()
 114                         i += 1
 115                         self.updateScrollbar()
 116
 117         def produceHTML(self):
 118                 return self.getText()