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implemented TListBox.TopIndex

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git-svn-id: trunk@1964 -
This commit is contained in:
mattias 2002-08-17 23:40:25 +00:00
parent bf90f8c32d
commit ce8e8b1113
1 changed files with 74 additions and 5 deletions
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79
lcl/interfaces/gtk/gtkobject.inc
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@ -1270,21 +1270,87 @@ begin
end;
{------------------------------------------------------------------------------
function TgtkObject.GetTopIndex(ListBoxObj: TObject): integer;
function TgtkObject.GetTopIndex(Sender: TObject): integer;
------------------------------------------------------------------------------}
function TgtkObject.GetTopIndex(ListBoxObj: TObject): integer;
function TgtkObject.GetTopIndex(Sender: TObject): integer;
var
ScrolledWindow: PGtkScrolledWindow;
VertAdj: PGTKAdjustment;
AdjValue: integer;
ListWidget: PGtkList;
AWidget: PGtkWidget;
GListItem: PGList;
ListItemWidget: PGtkWidget;
begin
Result:=0;
Result:=-1;
if not (Sender is TWinControl) then exit;
case TWinControl(Sender).fCompStyle of
csListBox:
begin
AWidget:=PGtkWidget(TWinControl(Sender).Handle);
ListWidget:=PGtkList(GetWidgetInfo(AWidget, True)^.ImplementationWidget);
ScrolledWindow:=PGtkScrolledWindow(AWidget);
VertAdj:=gtk_scrolled_window_get_vadjustment(ScrolledWindow);
if VertAdj=nil then
AdjValue:=0
else
AdjValue:=round(VertAdj^.value);
GListItem:=ListWidget^.children;
while GListItem<>nil do begin
inc(Result);
ListItemWidget:=PGtkWidget(GListItem^.data);
dec(AdjValue,ListItemWidget^.Allocation.Height);
if AdjValue<0 then break;
GListItem:=GListItem^.next;
end;
end;
end;
end;
{------------------------------------------------------------------------------
function TgtkObject.SetTopIndex(ListBoxObj: TObject; NewTopIndex: integer
function TgtkObject.SetTopIndex(Sender: TObject; NewTopIndex: integer
): integer;
------------------------------------------------------------------------------}
function TgtkObject.SetTopIndex(ListBoxObj: TObject; NewTopIndex: integer
function TgtkObject.SetTopIndex(Sender: TObject; NewTopIndex: integer
): integer;
var
ScrolledWindow: PGtkScrolledWindow;
VertAdj: PGTKAdjustment;
AdjValue, MaxAdjValue: integer;
ListWidget: PGtkList;
AWidget: PGtkWidget;
GListItem: PGList;
ListItemWidget: PGtkWidget;
i: Integer;
begin
Result:=0;
if not (Sender is TWinControl) then exit;
case TWinControl(Sender).fCompStyle of
csListBox:
begin
AWidget:=PGtkWidget(TWinControl(Sender).Handle);
ListWidget:=PGtkList(GetWidgetInfo(AWidget, True)^.ImplementationWidget);
ScrolledWindow:=PGtkScrolledWindow(AWidget);
AdjValue:=0;
GListItem:=ListWidget^.children;
i:=0;
while GListItem<>nil do begin
ListItemWidget:=PGtkWidget(GListItem^.data);
if i>=NewTopIndex then break;
inc(AdjValue,ListItemWidget^.Allocation.Height);
inc(i);
GListItem:=GListItem^.next;
end;
VertAdj:=gtk_scrolled_window_get_vadjustment(ScrolledWindow);
MaxAdjValue:=round(VertAdj^.upper-VertAdj^.page_size);
if AdjValue>MaxAdjValue then AdjValue:=MaxAdjValue;
gtk_adjustment_set_value(VertAdj,AdjValue);
end;
end;
end;
{------------------------------------------------------------------------------
@ -6755,6 +6821,9 @@ end;
{ =============================================================================
$Log$
Revision 1.309 2002/12/27 10:23:40 mattias
implemented TListBox.TopIndex
Revision 1.308 2002/12/27 09:05:50 mattias
fixed uninitialized logbrush