OSDMenuScrollPageUp.c

Go to the documentation of this file.

#include                "FBLib_TMSOSDMenu.h"
 
int OSDMenuScrollPageUp(void)
{
  TRACEENTER();
 
  tMenu                *pMenu;
  int                   ret, x;
 
  pMenu = &Menu[CurrentMenuLevel];
 
  if((pMenu->CurrentSelection == 0) && pMenu->ScrollLoop)
  {
    ret = OSDMenuFindPreviousSelectableEntry(pMenu->NrItems);
  }
  else if(pMenu->CurrentSelection == pMenu->CurrentTopIndex)
  {
    x = pMenu->CurrentSelection - pMenu->NrLines;
    if(x < 0) x = 0;
    ret = OSDMenuFindPreviousSelectableEntry(x + 1);
  }
  else
    ret = OSDMenuFindPreviousSelectableEntry(pMenu->CurrentTopIndex + 1);
 
  if(ret == -1)
  {
    TRACEEXIT();
    return -1;
  }
 
  pMenu->CurrentSelection = ret;
  ListDirty = TRUE;
 
  TRACEEXIT();
  return ret;
}