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Gtk3: implemented scrollbar events. Patch by Anton Kavalenka. issue #36964

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git-svn-id: trunk@63057 -
This commit is contained in:
zeljko 2020-04-24 15:26:26 +00:00
parent 51285457f5
commit 256824fdd6
1 changed files with 18 additions and 0 deletions
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18
lcl/interfaces/gtk3/gtk3widgets.pas
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@ -284,6 +284,7 @@ type
TGtk3ScrollBar = class(TGtk3Range)
protected
class procedure value_changed (bar:TGtk3Scrollbar);cdecl;
function CreateWidget(const Params: TCreateParams):PGtkWidget; override;
public
procedure SetParams;
@ -3686,6 +3687,21 @@ begin
end;
{ TGtk3ScrollBar }
class procedure TGtk3ScrollBar.value_changed(bar: TGtk3Scrollbar); cdecl;
var
scr:TScrollBar;
pgs:PGtkScrollbar;
ARange: PGtkRange;
begin
scr:=TScrollbar(bar.LCLObject);
pgs:=PGtkScrollbar(bar.FWidget);
arange:=PGtkRange(pgs);
scr.SetParams(
round(arange^.adjustment^.value),
round(arange^.adjustment^.lower),
round(arange^.adjustment^.upper),
round(arange^.adjustment^.page_size));
end;
function TGtk3ScrollBar.CreateWidget(const Params: TCreateParams): PGtkWidget;
var
@ -3702,6 +3718,8 @@ begin
ARange^.adjustment^.configure(Position, Min, Max + PageSize,
SmallChange, LargeChange, PageSize);
ARange^.adjustment^.set_value(Position);
g_signal_connect_data(ARange^.adjustment,
'value-changed', TGCallback(@TGtk3ScrollBar.value_changed), Self, nil, 0);
end;
end;