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unit Gesture; |
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|
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interface |
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|
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uses |
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Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, |
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Dialogs, Math, StrUtils; |
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|
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type |
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TMouseGesture = class(TObject) |
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private |
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FHook: Integer; |
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FHandle: THandle; |
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FGestureItemList: TStringList; |
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FBeginGesture: Boolean; |
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FCancelMode: Boolean; |
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FLastTime: Cardinal; |
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FStartPoint: TPoint; |
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FLastPoint: TPoint; |
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FMargin: Integer; |
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FOnGestureStart: TNotifyEvent; |
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FOnGestureMove: TNotifyEvent; |
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FOnGestureEnd: TNotifyEvent; |
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function GetGestureCount: Integer; |
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function CheckAction(Message: Integer; x, y: Integer): Boolean; |
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procedure AddAction(sx, sy: Integer); |
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function AddGesture(Item: string): Integer; |
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procedure ClearGesture; |
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function Get(Index: integer): string; |
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procedure Put(Index: integer; Item: string); |
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public |
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constructor Create; |
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destructor Destroy; override; |
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procedure SetHook(hWnd: THandle); |
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procedure UnHook; |
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property Items[Index: Integer]: string read Get write Put; default; |
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property GestureCount: Integer read GetGestureCount; |
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property Margin: Integer read FMargin write FMargin; |
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function GetGestureStr: string; |
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property OnGestureStart: TNotifyEvent read FOnGestureStart write FOnGestureStart; |
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property OnGestureMove: TNotifyEvent read FOnGestureMove write FOnGestureMove; |
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property OnGestureEnd: TNotifyEvent read FOnGestureEnd write FOnGestureEnd; |
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end; |
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|
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function GestureProc(nCode: Integer; wParam: WPARAM; lParam: LPARAM): LRESULT; stdcall; |
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|
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var |
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MouseGesture: TMouseGesture; |
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|
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implementation |
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|
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constructor TMouseGesture.Create; |
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begin |
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inherited; |
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FHook := 0; |
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FCancelMode := False; |
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FBeginGesture := False; |
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FMargin := 15; |
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FGestureItemList := TStringList.Create; |
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end; |
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|
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destructor TMouseGesture.Destroy; |
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begin |
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UnHook; |
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ClearGesture; |
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FGestureItemList.Free; |
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inherited; |
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end; |
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|
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//鐃?鐃?鐃?鐃?鐃?鐃? |
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procedure TMouseGesture.SetHook(hWnd: THandle); |
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begin |
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if FHook <> 0 then |
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Exit; |
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FHandle := hWnd; |
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UnHook; |
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FHook := SetWindowsHookEx(WH_MOUSE, @GestureProc, 0{HInstance}, GetCurrentThreadId); |
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end; |
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|
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//鐃?鐃?鐃?鐃?鐃?鐃?鐃緒申鐃緒申 |
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procedure TMouseGesture.UnHook; |
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begin |
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if FHook = 0 then |
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Exit; |
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UnhookWindowsHookEx(FHook); |
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FHook := 0; |
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end; |
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|
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//鐃?鐃?鐃?鐃?鐃緒申鐃?鐃?鐃緒申 |
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function GestureProc(nCode: Integer; wParam: WPARAM; lParam: LPARAM): LRESULT; stdcall; |
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var |
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mhs: PMouseHookStruct; |
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begin |
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if nCode = HC_ACTION then begin |
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mhs := PMouseHookStruct(lParam); |
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if MouseGesture.CheckAction(wParam, mhs^.pt.X, mhs^.pt.Y) then begin |
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Result := 1; |
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Exit; |
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end; |
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end; |
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Result := CallNextHookEx(MouseGesture.FHook, nCode, wParam, lParam); |
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end; |
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|
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function TMouseGesture.CheckAction(Message: Integer; x, y: Integer): Boolean; |
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var |
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dp: TPoint; |
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sp: TPoint; |
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hwnd: THandle; |
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begin |
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Result := False; |
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case Message of |
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WM_MOUSEMOVE: begin |
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if FBeginGesture then begin |
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//鐃緒申鐃?鐃?鐃?鐃緒申鐃?鐃緒申鐃?鐃?鐃緒申鐃?鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申 |
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hwnd := GetCapture; |
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//鐃?鐃?鐃?鐃?鐃?鐃?鐃?鐃緒申鐃?鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃?鐃?鐃緒申鐃緒申鐃緒申 |
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if (hwnd <> 0) and (hwnd <> FHandle) then begin |
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ReleaseCapture; |
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end; |
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SetCapture(FHandle); |
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dp := Point(x - FLastPoint.X, y - FLastPoint.Y); |
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sp := Point(Sign(dp.X), Sign(dp.Y)); |
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if (dp.X * dp.X + dp.Y * dp.Y) > (FMargin * FMargin) then begin |
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dp := Point(Abs(dp.X), Abs(dp.Y)); |
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if dp.X > dp.Y div 3 then |
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sp.Y := 0; |
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if dp.Y > dp.X div 3 then |
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sp.X := 0; |
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AddAction(sp.X, sp.Y); |
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FLastTime := GetTickCount; |
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FLastPoint := Point(x, y); |
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end; |
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Result := True; |
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end; |
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end; |
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WM_RBUTTONDOWN: begin |
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FBeginGesture := True; |
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FLastTime := 0; |
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FLastPoint := Point(x, y); |
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FStartPoint := Point(x, y); |
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SetCapture(FHandle); |
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end; |
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WM_RBUTTONUP: begin |
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FBeginGesture := False; |
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ReleaseCapture; |
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if FGestureItemList.Count <> 0 then begin |
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if Assigned(FOnGestureEnd) then |
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FOnGestureEnd(Self); |
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ClearGesture; |
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end; |
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end; |
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end; |
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end; |
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|
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//鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申 |
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procedure TMouseGesture.AddAction(sx, sy: Integer); |
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var |
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Direction: string; |
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begin |
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Direction := ''; |
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if (sx > 0) and (sy = 0) then |
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Direction := '鐃緒申' |
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else if (sx < 0) and (sy = 0) then |
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Direction := '鐃緒申' |
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else if sy > 0 then |
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Direction := '鐃緒申' |
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else if sy < 0 then |
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Direction := '鐃緒申' |
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else |
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Exit; |
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if FGestureItemList.Count > 0 then begin |
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if Items[FGestureItemList.Count - 1] = Direction then |
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Exit; |
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end else begin |
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//鐃?鐃?鐃?鐃?鐃緒申鐃?鐃?鐃? |
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if Assigned(FOnGestureStart) then |
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FOnGestureStart(Self); |
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end; |
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AddGesture(Direction); |
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if Assigned(FOnGestureMove) then |
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FOnGestureMove(Self); |
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end; |
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|
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//鐃緒申鐃緒申鐃緒申鐃?鐃?鐃?鐃?鐃緒申鐃?鐃緒申鐃?鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申 |
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function TMouseGesture.AddGesture(Item: string): Integer; |
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begin |
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Result := FGestureItemList.Add(Item); |
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end; |
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|
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//鐃?鐃緒申鐃緒申鐃緒申鐃緒申index鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申 |
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function TMouseGesture.Get(Index: Integer): string; |
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begin |
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Result := FGestureItemList[Index]; |
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end; |
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|
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//鐃?鐃緒申鐃緒申鐃緒申鐃緒申index鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申 |
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procedure TMouseGesture.Put(Index: Integer; Item: string); |
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begin |
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FGestureItemList[Index] := Item; |
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end; |
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|
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//鐃?鐃?鐃?鐃?鐃緒申鐃?鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申 |
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function TMouseGesture.GetGestureStr: string; |
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var |
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i: Integer; |
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begin |
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Result := ''; |
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for i := 0 to FGestureItemList.Count - 1 do |
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Result := Result + Items[i]; |
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end; |
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|
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//鐃?鐃?鐃?鐃?鐃緒申鐃?鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申 |
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function TMouseGesture.GetGestureCount: Integer; |
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begin |
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Result := FGestureItemList.Count; |
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end; |
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|
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//鐃?鐃?鐃?鐃?鐃緒申鐃?鐃緒申鐃?鐃緒申鐃?鐃緒申鐃緒申 |
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procedure TMouseGesture.ClearGesture; |
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begin |
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FGestureItemList.Clear; |
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end; |
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|
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end. |