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Annotation of /gikonavigoeson/gikonavi/Gesture.pas

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Revision 1.3 - (hide annotations) (download) (as text)
Wed Dec 14 15:14:42 2005 UTC (18 years, 4 months ago) by h677
Branch: MAIN
Changes since 1.2: +11 -27 lines
File MIME type: text/x-pascal
マウスジェスチャー有効時に画像プレビュー上で右クリックが
効かない不具合の修正。

1 yoffy 1.1 unit Gesture;
2    
3     interface
4    
5     uses
6     Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
7     Dialogs, Math, StrUtils;
8    
9     type
10     TMouseGesture = class(TObject)
11     private
12     FHook: Integer;
13     FHandle: THandle;
14     FGestureItemList: TStringList;
15     FBeginGesture: Boolean;
16     FCancelMode: Boolean;
17     FLastTime: Cardinal;
18     FStartPoint: TPoint;
19     FLastPoint: TPoint;
20     FMargin: Integer;
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);
31     public
32     constructor Create;
33     destructor Destroy; override;
34     procedure SetHook(hWnd: THandle);
35     procedure UnHook;
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;
43     end;
44    
45     function GestureProc(nCode: Integer; wParam: WPARAM; lParam: LPARAM): LRESULT; stdcall;
46    
47     var
48     MouseGesture: TMouseGesture;
49    
50     implementation
51    
52     constructor TMouseGesture.Create;
53     begin
54     inherited;
55     FHook := 0;
56     FCancelMode := False;
57     FBeginGesture := False;
58     FMargin := 15;
59     FGestureItemList := TStringList.Create;
60     end;
61    
62     destructor TMouseGesture.Destroy;
63     begin
64     UnHook;
65     ClearGesture;
66     FGestureItemList.Free;
67     inherited;
68     end;
69    
70     //鐃?鐃?鐃?鐃?鐃?鐃?
71     procedure TMouseGesture.SetHook(hWnd: THandle);
72     begin
73     if FHook <> 0 then
74     Exit;
75     FHandle := hWnd;
76     UnHook;
77     FHook := SetWindowsHookEx(WH_MOUSE, @GestureProc, 0{HInstance}, GetCurrentThreadId);
78     end;
79    
80     //鐃?鐃?鐃?鐃?鐃?鐃?鐃緒申鐃緒申
81     procedure TMouseGesture.UnHook;
82     begin
83     if FHook = 0 then
84     Exit;
85     UnhookWindowsHookEx(FHook);
86     FHook := 0;
87     end;
88    
89     //鐃?鐃?鐃?鐃?鐃緒申鐃?鐃?鐃緒申
90     function GestureProc(nCode: Integer; wParam: WPARAM; lParam: LPARAM): LRESULT; stdcall;
91     var
92     mhs: PMouseHookStruct;
93     begin
94     if nCode = HC_ACTION then begin
95     mhs := PMouseHookStruct(lParam);
96     if MouseGesture.CheckAction(wParam, mhs^.pt.X, mhs^.pt.Y) then begin
97     Result := 1;
98     Exit;
99     end;
100     end;
101     Result := CallNextHookEx(MouseGesture.FHook, nCode, wParam, lParam);
102     end;
103    
104     function TMouseGesture.CheckAction(Message: Integer; x, y: Integer): Boolean;
105     var
106     dp: TPoint;
107     sp: TPoint;
108 h677 1.2 hwnd: THandle;
109 yoffy 1.1 begin
110     Result := False;
111     case Message of
112     WM_MOUSEMOVE: begin
113     if FBeginGesture then begin
114 h677 1.2 //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
115     hwnd := GetCapture;
116     //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
117     if (hwnd <> 0) and (hwnd <> FHandle) then begin
118     ReleaseCapture;
119     end;
120 yoffy 1.1 SetCapture(FHandle);
121     dp := Point(x - FLastPoint.X, y - FLastPoint.Y);
122     sp := Point(Sign(dp.X), Sign(dp.Y));
123 h677 1.2 if (dp.X * dp.X + dp.Y * dp.Y) > (FMargin * FMargin) then begin
124 yoffy 1.1 dp := Point(Abs(dp.X), Abs(dp.Y));
125 h677 1.2 if dp.X > dp.Y div 3 then
126 yoffy 1.1 sp.Y := 0;
127 h677 1.2 if dp.Y > dp.X div 3 then
128 yoffy 1.1 sp.X := 0;
129     AddAction(sp.X, sp.Y);
130     FLastTime := GetTickCount;
131     FLastPoint := Point(x, y);
132     end;
133     Result := True;
134     end;
135     end;
136     WM_RBUTTONDOWN: begin
137 h677 1.3 FBeginGesture := True;
138     FLastTime := 0;
139     FLastPoint := Point(x, y);
140     FStartPoint := Point(x, y);
141     SetCapture(FHandle);
142 yoffy 1.1 end;
143     WM_RBUTTONUP: begin
144 h677 1.3 FBeginGesture := False;
145     ReleaseCapture;
146     if FGestureItemList.Count <> 0 then begin
147     if Assigned(FOnGestureEnd) then
148     FOnGestureEnd(Self);
149     ClearGesture;
150 yoffy 1.1 end;
151     end;
152     end;
153     end;
154    
155     //鐃緒申鐃緒申鐃緒申鐃緒申鐃緒申
156     procedure TMouseGesture.AddAction(sx, sy: Integer);
157     var
158     Direction: string;
159     begin
160     Direction := '';
161     if (sx > 0) and (sy = 0) then
162     Direction := '鐃緒申'
163     else if (sx < 0) and (sy = 0) then
164     Direction := '鐃緒申'
165     else if sy > 0 then
166     Direction := '鐃緒申'
167     else if sy < 0 then
168     Direction := '鐃緒申'
169     else
170     Exit;
171     if FGestureItemList.Count > 0 then begin
172     if Items[FGestureItemList.Count - 1] = Direction then
173     Exit;
174     end else begin
175     //鐃?鐃?鐃?鐃?鐃緒申鐃?鐃?鐃?
176     if Assigned(FOnGestureStart) then
177     FOnGestureStart(Self);
178     end;
179     AddGesture(Direction);
180     if Assigned(FOnGestureMove) then
181     FOnGestureMove(Self);
182     end;
183    
184     //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
185     function TMouseGesture.AddGesture(Item: string): Integer;
186     begin
187     Result := FGestureItemList.Add(Item);
188     end;
189    
190     //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
191     function TMouseGesture.Get(Index: Integer): string;
192     begin
193     Result := FGestureItemList[Index];
194     end;
195    
196     //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
197     procedure TMouseGesture.Put(Index: Integer; Item: string);
198     begin
199     FGestureItemList[Index] := Item;
200     end;
201    
202     //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
203     function TMouseGesture.GetGestureStr: string;
204     var
205     i: Integer;
206     begin
207     Result := '';
208     for i := 0 to FGestureItemList.Count - 1 do
209     Result := Result + Items[i];
210     end;
211    
212     //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
213     function TMouseGesture.GetGestureCount: Integer;
214     begin
215     Result := FGestureItemList.Count;
216     end;
217    
218     //鐃?鐃?鐃?鐃?鐃緒申鐃?鐃緒申鐃?鐃緒申鐃?鐃緒申鐃緒申
219     procedure TMouseGesture.ClearGesture;
220     begin
221     FGestureItemList.Clear;
222     end;
223    
224     end.

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