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SynCompletion: Support wheel scrolling. issue #17810

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git-svn-id: trunk@28130 -
This commit is contained in:
martin 2010-11-07 20:55:35 +00:00
parent 37980ef821
commit 6e5986d416
1 changed files with 18 additions and 3 deletions
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21
components/synedit/syncompletion.pas
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@ -41,9 +41,9 @@ unit SynCompletion;
interface
uses
LCLProc, LCLIntf, LCLType, SynEditMiscProcs,
Classes, Graphics, Forms, Controls, StdCtrls, ExtCtrls, Menus,
SysUtils, SynEditKeyCmds, SynEdit, SynEditTypes;
LCLProc, LCLIntf, LCLType, LMessages, messages, Classes, Graphics, Forms,
Controls, StdCtrls, ExtCtrls, Menus, SysUtils,
SynEditMiscProcs, SynEditKeyCmds, SynEdit, SynEditTypes;
type
TSynBaseCompletionPaintItem =
@ -135,6 +135,7 @@ type
FHintTimer: TTimer;
FLongLineHintTime: Integer;
FLongLineHintType: TSynCompletionLongHintType;
FMouseWheelAccumulator: Integer;
procedure UTF8KeyPress(var UTF8Key: TUTF8Char); override;
procedure SetCurrentString(const Value: string);
procedure KeyDown(var Key: Word; Shift: TShiftState); override;
@ -158,6 +159,7 @@ type
procedure DoOnResize; override;
procedure SetBackgroundColor(const AValue: TColor);
procedure FontChanged(Sender: TObject); override;
procedure WMMouseWheel(var Msg: TLMMouseEvent); message WM_MOUSEWHEEL;
private
fCurrentEditor: TComponent;
FDrawBorderWidth: Integer;
@ -984,6 +986,19 @@ begin
end;
end;
procedure TSynBaseCompletionForm.WMMouseWheel(var Msg: TLMMouseEvent);
const
WHEEL_DELTA = 120;
var
WheelClicks: Integer;
begin
Inc(FMouseWheelAccumulator, Msg.WheelDelta);
WheelClicks := FMouseWheelAccumulator div WHEEL_DELTA;
FMouseWheelAccumulator := FMouseWheelAccumulator - WheelClicks * WHEEL_DELTA;
WheelClicks := WheelClicks * Mouse.WheelScrollLines;
Scroll.Position := Max(0, Min(FItemList.Count - NbLinesInWindow, Scroll.Position - WheelClicks));
end;
procedure TSynBaseCompletionForm.SetLongLineHintTime(const AValue: Integer);
begin
if FLongLineHintTime = AValue then exit;