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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 ) if ( current == 1 )
return; return;
if ( current < std::size_t(distance) ) if ( current <= std::size_t(distance) )
current = 1; current = 1;
else else
current -= std::size_t(distance); current -= std::size_t(distance);
if ( current <= std::size_t(yoffset) ) if ( current <= std::size_t(yoffset) )
{ {
yoffset -= distance; if ( yoffset < distance )
if ( yoffset < 0 )
yoffset = 0; yoffset = 0;
else
yoffset -= distance;
} }
} }
@ -1555,17 +1555,17 @@ void FListBox::nextListItem (int distance)
if ( current == element_count ) if ( current == element_count )
return; return;
current += std::size_t(distance); if ( current + std::size_t(distance) > element_count )
if ( current > element_count )
current = element_count; current = element_count;
else
current += std::size_t(distance);
if ( current - std::size_t(yoffset) > getClientHeight() ) if ( current - std::size_t(yoffset) > getClientHeight() )
{ {
yoffset += distance; if ( yoffset > yoffset_end - distance )
if ( yoffset > yoffset_end )
yoffset = yoffset_end; yoffset = yoffset_end;
else
yoffset += distance;
} }
} }
//---------------------------------------------------------------------- //----------------------------------------------------------------------