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implement mousewheel support

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git-svn-id: trunk@4941 -
This commit is contained in:
micha 2003-12-23 16:48:32 +00:00
parent 8be99ebec5
commit 6b3b71d99a
1 changed files with 93 additions and 64 deletions
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39
components/synedit/synedit.pp
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@ -273,8 +273,9 @@ type
procedure WMImeNotify(var Msg: TMessage); message WM_IME_NOTIFY;
{$ENDIF}
procedure WMKillFocus(var Msg: TWMKillFocus); message WM_KILLFOCUS;
{$IFNDEF SYN_LAZARUS}
// ToDo mouse wheel
{$IFDEF SYN_LAZARUS}
procedure WMMouseWheel(var Msg: TLMMouseEvent); message LM_MOUSEWHEEL;
{$ELSE}
procedure WMMouseWheel(var Msg: TMessage); message WM_MOUSEWHEEL;
{$ENDIF}
procedure WMSetCursor(var Msg: TWMSetCursor); message WM_SETCURSOR;
@ -331,9 +332,7 @@ type
fBookMarkOpt: TSynBookMarkOpt;
fBorderStyle: TBorderStyle;
fHideSelection: boolean;
{$IFNDEF SYN_LAZARUS}
fMouseWheelAccumulator: integer;
{$ENDIF}
fOverwriteCaret: TSynEditCaretType;
fInsertCaret: TSynEditCaretType;
fCaretOffset: TPoint;
@ -6669,7 +6668,36 @@ begin
fRedoList.Unlock;
end;
{$IFNDEF SYN_LAZARUS}
{$IFDEF SYN_LAZARUS}
procedure TCustomSynEdit.WMMouseWheel(var Msg: TLMMouseEvent);
var
nDelta: integer;
nWheelClicks: integer;
const
LinesToScroll = 3;
WHEEL_DELTA = 120;
WHEEL_PAGESCROLL = $FFFFFFFF;
begin
if csDesigning in ComponentState then
exit;
if GetKeyState(VK_CONTROL) >= 0 then
nDelta := LinesToScroll
else
nDelta := LinesInWindow shr Ord(eoHalfPageScroll in fOptions);
Inc(fMouseWheelAccumulator, Msg.WheelDelta);
nWheelClicks := fMouseWheelAccumulator div WHEEL_DELTA;
fMouseWheelAccumulator := fMouseWheelAccumulator mod WHEEL_DELTA;
if (nDelta = integer(WHEEL_PAGESCROLL)) or (nDelta > LinesInWindow) then
nDelta := LinesInWindow;
TopLine := TopLine - (nDelta * nWheelClicks);
Update;
end;
{$ELSE}
procedure TCustomSynEdit.WMMouseWheel(var Msg: TMessage);
var
nDelta: integer;
@ -6701,6 +6729,7 @@ begin
TopLine := TopLine - (nDelta * nWheelClicks);
Update;
end;
{$ENDIF}
procedure TCustomSynEdit.SetWantTabs(const Value: boolean);