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Fix FListBox prevListItem() + nextListItem()

This commit is contained in:
Markus Gans 2018-10-29 19:10:42 +01:00
parent 7a2abc9421
commit ce9d05ec7b
1 changed files with 10 additions and 10 deletions
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20
src/flistbox.cpp
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@ -1532,17 +1532,17 @@ void FListBox::prevListItem (int distance)
if ( current == 1 )
return;
if ( current < std::size_t(distance) )
if ( current <= std::size_t(distance) )
current = 1;
else
current -= std::size_t(distance);
if ( current <= std::size_t(yoffset) )
{
yoffset -= distance;
if ( yoffset < 0 )
if ( yoffset < distance )
yoffset = 0;
else
yoffset -= distance;
}
}
@ -1555,17 +1555,17 @@ void FListBox::nextListItem (int distance)
if ( current == element_count )
return;
current += std::size_t(distance);
if ( current > element_count )
if ( current + std::size_t(distance) > element_count )
current = element_count;
else
current += std::size_t(distance);
if ( current - std::size_t(yoffset) > getClientHeight() )
{
yoffset += distance;
if ( yoffset > yoffset_end )
if ( yoffset > yoffset_end - distance )
yoffset = yoffset_end;
else
yoffset += distance;
}
}
//----------------------------------------------------------------------