6 Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
7 Dialogs, Math, StrUtils;
10 TMouseGesture = class(TObject)
14 FGestureItemList: TStringList;
15 FBeginGesture: Boolean;
21 FOnGestureStart: TNotifyEvent;
22 FOnGestureMove: TNotifyEvent;
23 FOnGestureEnd: TNotifyEvent;
24 function GetGestureCount: Integer;
25 function CheckAction(Message: Integer; x, y: Integer): Boolean;
26 procedure AddAction(sx, sy: Integer);
27 function AddGesture(Item: string): Integer;
28 procedure ClearGesture;
29 function Get(Index: integer): string;
30 procedure Put(Index: integer; Item: string);
33 destructor Destroy; override;
34 procedure SetHook(hWnd: THandle);
36 property Items[Index: Integer]: string read Get write Put; default;
37 property GestureCount: Integer read GetGestureCount;
38 property Margin: Integer read FMargin write FMargin;
39 function GetGestureStr: string;
40 property OnGestureStart: TNotifyEvent read FOnGestureStart write FOnGestureStart;
41 property OnGestureMove: TNotifyEvent read FOnGestureMove write FOnGestureMove;
42 property OnGestureEnd: TNotifyEvent read FOnGestureEnd write FOnGestureEnd;
45 function GestureProc(nCode: Integer; wParam: WPARAM; lParam: LPARAM): LRESULT; stdcall;
48 MouseGesture: TMouseGesture;
52 constructor TMouseGesture.Create;
57 FBeginGesture := False;
59 FGestureItemList := TStringList.Create;
62 destructor TMouseGesture.Destroy;
66 FGestureItemList.Free;
70 //
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71 procedure TMouseGesture.SetHook(hWnd: THandle);
77 FHook := SetWindowsHookEx(WH_MOUSE, @GestureProc, 0{HInstance}, GetCurrentThreadId);
80 //
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81 procedure TMouseGesture.UnHook;
85 UnhookWindowsHookEx(FHook);
89 //
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90 function GestureProc(nCode: Integer; wParam: WPARAM; lParam: LPARAM): LRESULT; stdcall;
92 mhs: PMouseHookStruct;
94 if nCode = HC_ACTION then begin
95 mhs := PMouseHookStruct(lParam);
96 if MouseGesture.CheckAction(wParam, mhs^.pt.X, mhs^.pt.Y) then begin
101 Result := CallNextHookEx(MouseGesture.FHook, nCode, wParam, lParam);
104 function TMouseGesture.CheckAction(Message: Integer; x, y: Integer): Boolean;
112 if FBeginGesture then begin
114 dp := Point(x - FLastPoint.X, y - FLastPoint.Y);
115 sp := Point(Sign(dp.X), Sign(dp.Y));
116 if Sqrt(dp.X * dp.X + dp.Y * dp.Y) > FMargin then begin
117 dp := Point(Abs(dp.X), Abs(dp.Y));
118 if dp.X > dp.Y / 3 then
120 if dp.Y > dp.X / 3 then
122 AddAction(sp.X, sp.Y);
123 FLastTime := GetTickCount;
124 FLastPoint := Point(x, y);
129 WM_RBUTTONDOWN: begin
130 if not FCancelMode then begin
131 FBeginGesture := True;
133 FLastPoint := Point(x, y);
134 FStartPoint := Point(x, y);
143 FBeginGesture := False;
145 if FGestureItemList.Count <> 0 then begin
146 if Assigned(FOnGestureEnd) then
151 //
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152 mouse_event(MOUSEEVENTF_ABSOLUTE or MOUSEEVENTF_RIGHTDOWN, FStartPoint.X, FStartPoint.Y, 0, 0);
153 mouse_event(MOUSEEVENTF_ABSOLUTE or MOUSEEVENTF_RIGHTUP, x, y, 0, 0);
160 //
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161 procedure TMouseGesture.AddAction(sx, sy: Integer);
166 if (sx > 0) and (sy = 0) then
168 else if (sx < 0) and (sy = 0) then
176 if FGestureItemList.Count > 0 then begin
177 if Items[FGestureItemList.Count - 1] = Direction then
180 //
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181 if Assigned(FOnGestureStart) then
182 FOnGestureStart(Self);
184 AddGesture(Direction);
185 if Assigned(FOnGestureMove) then
186 FOnGestureMove(Self);
189 //
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190 function TMouseGesture.AddGesture(Item: string): Integer;
192 Result := FGestureItemList.Add(Item);
195 //
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196 function TMouseGesture.Get(Index: Integer): string;
198 Result := FGestureItemList[Index];
201 //
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202 procedure TMouseGesture.Put(Index: Integer; Item: string);
204 FGestureItemList[Index] := Item;
207 //
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208 function TMouseGesture.GetGestureStr: string;
213 for i := 0 to FGestureItemList.Count - 1 do
214 Result := Result + Items[i];
217 //
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218 function TMouseGesture.GetGestureCount: Integer;
220 Result := FGestureItemList.Count;
223 //
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224 procedure TMouseGesture.ClearGesture;
226 FGestureItemList.Clear;