|
1 /* |
|
2 * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). |
|
3 * All rights reserved. |
|
4 * This component and the accompanying materials are made available |
|
5 * under the terms of "Eclipse Public License v1.0" |
|
6 * which accompanies this distribution, and is available |
|
7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
|
8 * |
|
9 * Initial Contributors: |
|
10 * Nokia Corporation - initial contribution. |
|
11 * |
|
12 * Contributors: |
|
13 * |
|
14 * Description: Drag touch gesture recognizer. |
|
15 * |
|
16 */ |
|
17 |
|
18 #include "akntouchgesturefwdefs.h" |
|
19 #include "akntouchgesturefwevent.h" |
|
20 #include "akntouchgesturefwdragrecognizer.h" |
|
21 #include "akntouchgesturefwsettings.h" |
|
22 |
|
23 using namespace AknTouchGestureFw; |
|
24 |
|
25 // ======== MEMBER FUNCTIONS ======== |
|
26 |
|
27 // --------------------------------------------------------------------------- |
|
28 // Two-phased constructor. |
|
29 // --------------------------------------------------------------------------- |
|
30 // |
|
31 CAknTouchGestureFwDragRecognizer* CAknTouchGestureFwDragRecognizer::NewL( |
|
32 CAknTouchGestureFwRecognitionEngine& aEngine ) |
|
33 { |
|
34 CAknTouchGestureFwDragRecognizer* self = |
|
35 CAknTouchGestureFwDragRecognizer::NewLC( aEngine ); |
|
36 CleanupStack::Pop( self ); |
|
37 return self; |
|
38 } |
|
39 |
|
40 |
|
41 // --------------------------------------------------------------------------- |
|
42 // Two-phased constructor. |
|
43 // --------------------------------------------------------------------------- |
|
44 // |
|
45 CAknTouchGestureFwDragRecognizer* CAknTouchGestureFwDragRecognizer::NewLC( |
|
46 CAknTouchGestureFwRecognitionEngine& aEngine ) |
|
47 { |
|
48 CAknTouchGestureFwDragRecognizer* self |
|
49 = new ( ELeave ) CAknTouchGestureFwDragRecognizer( aEngine ); |
|
50 CleanupStack::PushL( self ); |
|
51 return self; |
|
52 } |
|
53 |
|
54 |
|
55 // --------------------------------------------------------------------------- |
|
56 // Destructor |
|
57 // --------------------------------------------------------------------------- |
|
58 // |
|
59 CAknTouchGestureFwDragRecognizer::~CAknTouchGestureFwDragRecognizer() |
|
60 { |
|
61 } |
|
62 |
|
63 |
|
64 // --------------------------------------------------------------------------- |
|
65 // Returns the drag gesture group. |
|
66 // --------------------------------------------------------------------------- |
|
67 // |
|
68 TAknTouchGestureFwGroup CAknTouchGestureFwDragRecognizer::GestureGroup() const |
|
69 { |
|
70 return EAknTouchGestureFwGroupDrag; |
|
71 } |
|
72 |
|
73 |
|
74 // --------------------------------------------------------------------------- |
|
75 // Cancels the drag gesture recognition. |
|
76 // --------------------------------------------------------------------------- |
|
77 // |
|
78 void CAknTouchGestureFwDragRecognizer::CancelRecognizing() |
|
79 { |
|
80 if ( iContinuousFeedback ) |
|
81 { |
|
82 StopContinuousFeedback(); |
|
83 iContinuousFeedback = EFalse; |
|
84 } |
|
85 if ( iDragDetected ) |
|
86 { |
|
87 // We ignore the possible leave in order to ensure that the |
|
88 // state gets reset. |
|
89 TRAP_IGNORE( SendDragEventL( EAknTouchGestureFwStop ) ); |
|
90 } |
|
91 Reset(); |
|
92 } |
|
93 |
|
94 |
|
95 // --------------------------------------------------------------------------- |
|
96 // Handles single-touch pointer events. |
|
97 // --------------------------------------------------------------------------- |
|
98 // |
|
99 void CAknTouchGestureFwDragRecognizer::HandleSinglePointerEventL( |
|
100 const TPointerEventData& aPointerData ) |
|
101 { |
|
102 switch ( aPointerData.iPointerEvent.iType ) |
|
103 { |
|
104 case TPointerEvent::EButton1Down: |
|
105 { |
|
106 StartSingleRecognizing( aPointerData.iPointerEvent.iPosition ); |
|
107 break; |
|
108 } |
|
109 case TPointerEvent::EDrag: |
|
110 { |
|
111 if ( iStartOnSingleTouchDrag ) |
|
112 { |
|
113 // Start clears iStartOnSingleTouchDrag |
|
114 StartSingleRecognizing( aPointerData.iPointerEvent.iPosition ); |
|
115 } |
|
116 else |
|
117 { |
|
118 SingleRecognizeL( aPointerData.iPointerEvent.iPosition ); |
|
119 } |
|
120 break; |
|
121 } |
|
122 case TPointerEvent::EButton1Up: |
|
123 { |
|
124 CompleteSingleRecognizingL(); |
|
125 break; |
|
126 } |
|
127 default: |
|
128 { |
|
129 break; |
|
130 } |
|
131 } |
|
132 } |
|
133 |
|
134 |
|
135 // --------------------------------------------------------------------------- |
|
136 // Handles multi-touch pointer events. |
|
137 // --------------------------------------------------------------------------- |
|
138 // |
|
139 void CAknTouchGestureFwDragRecognizer::HandleMultiPointerEventL( |
|
140 const TPointerEventData& aPointerData, |
|
141 const TPoint& /*aFirstPointerPosition*/, |
|
142 const TPoint& /*aSecondPointerPosition*/ ) |
|
143 { |
|
144 switch ( aPointerData.iPointerEvent.iType ) |
|
145 { |
|
146 case TPointerEvent::EButton1Down: |
|
147 { |
|
148 // Multi touch begin completes single recognizing |
|
149 CompleteSingleRecognizingL(); |
|
150 break; |
|
151 } |
|
152 case TPointerEvent::EDrag: |
|
153 { |
|
154 break; |
|
155 } |
|
156 case TPointerEvent::EButton1Up: |
|
157 { |
|
158 // Upon next single touch drag, start recognition. |
|
159 // Current position is not necessarily accurate. |
|
160 iStartOnSingleTouchDrag = ETrue; |
|
161 break; |
|
162 } |
|
163 default: |
|
164 { |
|
165 break; |
|
166 } |
|
167 } |
|
168 } |
|
169 |
|
170 |
|
171 // --------------------------------------------------------------------------- |
|
172 // C++ constructor. |
|
173 // --------------------------------------------------------------------------- |
|
174 // |
|
175 CAknTouchGestureFwDragRecognizer::CAknTouchGestureFwDragRecognizer( |
|
176 CAknTouchGestureFwRecognitionEngine& aEngine ) |
|
177 : CAknTouchGestureFwBaseRecognizer( aEngine ), |
|
178 iStartPosition( 0, 0 ), |
|
179 iCurrentPosition( 0, 0 ), |
|
180 iPreviousPosition( 0, 0 ), |
|
181 iDragDetected( EFalse ), |
|
182 iDragArea() |
|
183 { |
|
184 Reset(); |
|
185 } |
|
186 |
|
187 |
|
188 // --------------------------------------------------------------------------- |
|
189 // Starts recognizing the drag gesture. |
|
190 // --------------------------------------------------------------------------- |
|
191 // |
|
192 void CAknTouchGestureFwDragRecognizer::StartSingleRecognizing( |
|
193 const TPoint& aPointerPos ) |
|
194 { |
|
195 iDragDetected = EFalse; |
|
196 iDragArea.Start( aPointerPos ); |
|
197 iStartPosition = aPointerPos; |
|
198 iCurrentPosition = aPointerPos; |
|
199 iPreviousPosition.SetXY( 0, 0 ); |
|
200 iStartOnSingleTouchDrag = EFalse; |
|
201 } |
|
202 |
|
203 |
|
204 // --------------------------------------------------------------------------- |
|
205 // Continues recognizing the drag gesture, called on drag pointer events. |
|
206 // --------------------------------------------------------------------------- |
|
207 // |
|
208 void CAknTouchGestureFwDragRecognizer::SingleRecognizeL( |
|
209 const TPoint& aPointerPos ) |
|
210 { |
|
211 iPreviousPosition = iCurrentPosition; |
|
212 iCurrentPosition = aPointerPos; |
|
213 |
|
214 if ( !iDragDetected ) |
|
215 { |
|
216 // Check if points form a drag. |
|
217 iDragDetected = iDragArea.Check( aPointerPos, DragThreshold() ); |
|
218 if ( iDragDetected ) |
|
219 { |
|
220 SendDragEventL( EAknTouchGestureFwStart ); |
|
221 } |
|
222 } |
|
223 else // iDragDetected holds |
|
224 { |
|
225 // Send update event if position changed. |
|
226 if ( iPreviousPosition != iCurrentPosition ) |
|
227 { |
|
228 SendDragEventL( EAknTouchGestureFwOn ); |
|
229 } |
|
230 } |
|
231 } |
|
232 |
|
233 |
|
234 // --------------------------------------------------------------------------- |
|
235 // Ends the drag gesture recognition. |
|
236 // --------------------------------------------------------------------------- |
|
237 // |
|
238 void CAknTouchGestureFwDragRecognizer::CompleteSingleRecognizingL() |
|
239 { |
|
240 if ( iContinuousFeedback ) |
|
241 { |
|
242 StopContinuousFeedback(); |
|
243 iContinuousFeedback = EFalse; |
|
244 } |
|
245 |
|
246 // Send drag stopped event only if drag was detected. |
|
247 if ( iDragDetected ) |
|
248 { |
|
249 iDragDetected = EFalse; |
|
250 SendDragEventL( EAknTouchGestureFwStop ); |
|
251 } |
|
252 } |
|
253 |
|
254 |
|
255 // --------------------------------------------------------------------------- |
|
256 // Send a drag gesture event to the observer. |
|
257 // --------------------------------------------------------------------------- |
|
258 // |
|
259 void CAknTouchGestureFwDragRecognizer::SendDragEventL( |
|
260 TAknTouchGestureFwState aGestureState ) |
|
261 { |
|
262 if ( aGestureState != EAknTouchGestureFwStop ) |
|
263 { |
|
264 TTouchFeedbackType feedbackType( |
|
265 FeedbackType( EAknTouchGestureFwDrag ) ); |
|
266 |
|
267 if ( feedbackType & ETouchFeedbackVibra ) |
|
268 { |
|
269 StartContinuousFeedback( ETouchContinuousSmooth, |
|
270 KAknTouchGestureFwFeedbackIntensity, |
|
271 KAknTouchGestureFwDragFeedbackTimeout ); |
|
272 iContinuousFeedback = ETrue; |
|
273 } |
|
274 } |
|
275 |
|
276 TAknTouchGestureFwDragEvent drag; |
|
277 drag.SetState( aGestureState ); |
|
278 drag.SetStartPosition( iStartPosition ); |
|
279 drag.SetCurrentPosition( iCurrentPosition ); |
|
280 drag.SetPreviousPosition( iPreviousPosition ); |
|
281 SendGestureEventL( drag ); |
|
282 } |
|
283 |
|
284 |
|
285 // --------------------------------------------------------------------------- |
|
286 // Resets recognizer's state. |
|
287 // --------------------------------------------------------------------------- |
|
288 // |
|
289 void CAknTouchGestureFwDragRecognizer::Reset() |
|
290 { |
|
291 iStartPosition.SetXY( 0, 0 ); |
|
292 iCurrentPosition.SetXY( 0, 0 ); |
|
293 iPreviousPosition.SetXY( 0, 0 ); |
|
294 iDragDetected = EFalse; |
|
295 iDragArea.Reset(); |
|
296 iStartOnSingleTouchDrag = EFalse; |
|
297 } |
|
298 |
|
299 // End of File |