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[USETUP]

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Center the current list item before drawing the list.
#CORE-10659 #resolve

svn path=/trunk/; revision=70287
This commit is contained in:
Eric Kohl 2015-12-07 16:10:09 +00:00
parent ebb8c660f4
commit dd58b4a93f
1 changed files with 47 additions and 0 deletions
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47
reactos/base/setup/usetup/genlist.c
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@ -341,6 +341,51 @@ DrawScrollBarGenericList(
} }
static
VOID
CenterCurrentListItem(
PGENERIC_LIST List)
{
PLIST_ENTRY Entry;
ULONG MaxVisibleItems, ItemCount, i;
if ((List->Top == 0 && List->Bottom == 0) ||
IsListEmpty(&List->ListHead) ||
List->CurrentEntry == NULL)
return;
MaxVisibleItems = (ULONG)(List->Bottom - List->Top - 1);
ItemCount = 0;
Entry = List->ListHead.Flink;
while (Entry != &List->ListHead)
{
ItemCount++;
Entry = Entry->Flink;
}
if (ItemCount > MaxVisibleItems)
{
Entry = &List->CurrentEntry->Entry;
for (i = 0; i < MaxVisibleItems / 2; i++)
{
if (Entry->Blink != &List->ListHead)
Entry = Entry->Blink;
}
List->FirstShown = Entry;
for (i = 0; i < MaxVisibleItems; i++)
{
if (Entry->Flink != &List->ListHead)
Entry = Entry->Flink;
}
List->LastShown = Entry;
}
}
VOID VOID
DrawGenericList( DrawGenericList(
PGENERIC_LIST List, PGENERIC_LIST List,
@ -360,6 +405,8 @@ DrawGenericList(
if (IsListEmpty(&List->ListHead)) if (IsListEmpty(&List->ListHead))
return; return;
CenterCurrentListItem(List);
DrawListEntries(List); DrawListEntries(List);
DrawScrollBarGenericList(List); DrawScrollBarGenericList(List);
} }