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Add generic list scrolling

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See issue #3234 for more details.

svn path=/trunk/; revision=33451
This commit is contained in:
Hervé Poussineau 2008-05-11 21:32:00 +00:00
parent 2199183bbe
commit 906bec0223
1 changed files with 15 additions and 1 deletions
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16
reactos/base/setup/usetup/genlist.c
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@ -46,6 +46,8 @@ typedef struct _GENERIC_LIST
{ {
LIST_ENTRY ListHead; LIST_ENTRY ListHead;
PLIST_ENTRY FirstShown;
PLIST_ENTRY LastShown;
SHORT Left; SHORT Left;
SHORT Top; SHORT Top;
SHORT Right; SHORT Right;
@ -230,13 +232,14 @@ DrawListEntries(PGENERIC_LIST GenericList)
coPos.Y = GenericList->Top + 1; coPos.Y = GenericList->Top + 1;
Width = GenericList->Right - GenericList->Left - 1; Width = GenericList->Right - GenericList->Left - 1;
Entry = GenericList->ListHead.Flink; Entry = GenericList->FirstShown;
while (Entry != &GenericList->ListHead) while (Entry != &GenericList->ListHead)
{ {
ListEntry = CONTAINING_RECORD (Entry, GENERIC_LIST_ENTRY, Entry); ListEntry = CONTAINING_RECORD (Entry, GENERIC_LIST_ENTRY, Entry);
if (coPos.Y == GenericList->Bottom) if (coPos.Y == GenericList->Bottom)
break; break;
GenericList->LastShown = Entry;
FillConsoleOutputAttribute (StdOutput, FillConsoleOutputAttribute (StdOutput,
(GenericList->CurrentEntry == ListEntry) ? (GenericList->CurrentEntry == ListEntry) ?
@ -289,6 +292,7 @@ DrawGenericList(PGENERIC_LIST List,
SHORT Right, SHORT Right,
SHORT Bottom) SHORT Bottom)
{ {
List->FirstShown = List->ListHead.Flink;
List->Left = Left; List->Left = Left;
List->Top = Top; List->Top = Top;
List->Right = Right; List->Right = Right;
@ -314,6 +318,11 @@ ScrollDownGenericList (PGENERIC_LIST List)
if (List->CurrentEntry->Entry.Flink != &List->ListHead) if (List->CurrentEntry->Entry.Flink != &List->ListHead)
{ {
Entry = List->CurrentEntry->Entry.Flink; Entry = List->CurrentEntry->Entry.Flink;
if (List->LastShown == &List->CurrentEntry->Entry)
{
List->FirstShown = List->FirstShown->Flink;
List->LastShown = List->LastShown->Flink;
}
List->CurrentEntry = CONTAINING_RECORD (Entry, GENERIC_LIST_ENTRY, Entry); List->CurrentEntry = CONTAINING_RECORD (Entry, GENERIC_LIST_ENTRY, Entry);
DrawListEntries(List); DrawListEntries(List);
} }
@ -331,6 +340,11 @@ ScrollUpGenericList (PGENERIC_LIST List)
if (List->CurrentEntry->Entry.Blink != &List->ListHead) if (List->CurrentEntry->Entry.Blink != &List->ListHead)
{ {
Entry = List->CurrentEntry->Entry.Blink; Entry = List->CurrentEntry->Entry.Blink;
if (List->FirstShown == &List->CurrentEntry->Entry)
{
List->FirstShown = List->FirstShown->Blink;
List->LastShown = List->LastShown->Blink;
}
List->CurrentEntry = CONTAINING_RECORD (Entry, GENERIC_LIST_ENTRY, Entry); List->CurrentEntry = CONTAINING_RECORD (Entry, GENERIC_LIST_ENTRY, Entry);
DrawListEntries(List); DrawListEntries(List);
} }