|
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: Restrictor of AknPhysics |
|
15 * |
|
16 */ |
|
17 |
|
18 |
|
19 #include <e32debug.h> |
|
20 |
|
21 #include "aknphysicsrestrictor.h" |
|
22 #include "aknphysicsparameterprovider.h" |
|
23 |
|
24 const TReal KNotRestrictedSegment( 1.0 ); |
|
25 const TInt KEmptySpaceFactor( 100 ); |
|
26 |
|
27 // ======== MEMBER FUNCTIONS ======== |
|
28 |
|
29 // --------------------------------------------------------------------------- |
|
30 // CAknPhysicsRestrictor::NewL |
|
31 // --------------------------------------------------------------------------- |
|
32 // |
|
33 CAknPhysicsRestrictor* CAknPhysicsRestrictor::NewL( |
|
34 CAknPhysicsParameterProvider* aProvider ) |
|
35 { |
|
36 CAknPhysicsRestrictor* self = CAknPhysicsRestrictor::NewLC( aProvider ); |
|
37 CleanupStack::Pop( self ); |
|
38 return self; |
|
39 } |
|
40 |
|
41 |
|
42 // --------------------------------------------------------------------------- |
|
43 // CAknPhysicsRestrictor::NewLC |
|
44 // --------------------------------------------------------------------------- |
|
45 // |
|
46 CAknPhysicsRestrictor* CAknPhysicsRestrictor::NewLC( |
|
47 CAknPhysicsParameterProvider* aProvider ) |
|
48 { |
|
49 CAknPhysicsRestrictor* self = |
|
50 new ( ELeave ) CAknPhysicsRestrictor( aProvider ); |
|
51 CleanupStack::PushL( self ); |
|
52 self->ConstructL(); |
|
53 return self; |
|
54 } |
|
55 |
|
56 |
|
57 // --------------------------------------------------------------------------- |
|
58 // CAknPhysicsRestrictor::~CAknPhysicsRestrictor |
|
59 // --------------------------------------------------------------------------- |
|
60 // |
|
61 CAknPhysicsRestrictor::~CAknPhysicsRestrictor() |
|
62 { |
|
63 } |
|
64 |
|
65 |
|
66 // --------------------------------------------------------------------------- |
|
67 // CAknPhysicsRestrictor::UpdatePhysicsEnvironment |
|
68 // --------------------------------------------------------------------------- |
|
69 // |
|
70 void CAknPhysicsRestrictor::UpdatePhysicsEnvironment( const TSize& aWorldSize, |
|
71 const TSize& aViewSize, |
|
72 const TBool& aLandscape ) |
|
73 { |
|
74 iWorldSize = aWorldSize; |
|
75 iViewSize = aViewSize; |
|
76 iLandscape = aLandscape; |
|
77 CalculateViewLimits(); |
|
78 } |
|
79 |
|
80 |
|
81 // ----------------------------------------------------------------------------- |
|
82 // CAknPhysicsRestrictor::ViewTopPosition() |
|
83 // ----------------------------------------------------------------------------- |
|
84 // |
|
85 TInt CAknPhysicsRestrictor::ViewTopPosition() const |
|
86 { |
|
87 TInt topPosition( 0 ); |
|
88 |
|
89 if ( iLandscape ) |
|
90 { |
|
91 topPosition = iViewSize.iWidth/2; |
|
92 } |
|
93 else |
|
94 { |
|
95 topPosition = iViewSize.iHeight/2; |
|
96 } |
|
97 return topPosition; |
|
98 } |
|
99 |
|
100 |
|
101 // ----------------------------------------------------------------------------- |
|
102 // CAknPhysicsRestrictor::ViewBottomPosition() |
|
103 // ----------------------------------------------------------------------------- |
|
104 // |
|
105 TInt CAknPhysicsRestrictor::ViewBottomPosition() const |
|
106 { |
|
107 TInt bottomPosition( 0 ); |
|
108 |
|
109 // If world size smaller than view size, bottom position is same as top |
|
110 // position |
|
111 if ( iLandscape && iViewSize.iWidth >= iWorldSize.iWidth |
|
112 || !iLandscape && iViewSize.iHeight >= iWorldSize.iHeight ) |
|
113 { |
|
114 bottomPosition = ViewTopPosition(); |
|
115 } |
|
116 |
|
117 // Otherwise calculate bottom position according to world size |
|
118 else |
|
119 { |
|
120 if ( iLandscape ) |
|
121 { |
|
122 bottomPosition = iWorldSize.iWidth - iViewSize.iWidth / 2; |
|
123 } |
|
124 else |
|
125 { |
|
126 bottomPosition = iWorldSize.iHeight - iViewSize.iHeight / 2; |
|
127 } |
|
128 } |
|
129 return bottomPosition; |
|
130 } |
|
131 |
|
132 |
|
133 // ----------------------------------------------------------------------------- |
|
134 // CAknPhysicsRestrictor::PositionRevealsEmptySpace() |
|
135 // ----------------------------------------------------------------------------- |
|
136 // |
|
137 TBool CAknPhysicsRestrictor::PositionRevealsEmptySpace( TPoint& aPosition ) |
|
138 { |
|
139 TInt startTop( ViewTopPosition() ); |
|
140 TInt endBottom( ViewBottomPosition() ); |
|
141 TInt* positionCoordinate; |
|
142 |
|
143 if ( iLandscape ) |
|
144 { |
|
145 positionCoordinate = &aPosition.iX; |
|
146 } |
|
147 else |
|
148 { |
|
149 positionCoordinate = &aPosition.iY; |
|
150 } |
|
151 |
|
152 if ( aPosition == TPoint() |
|
153 || *positionCoordinate >= startTop && *positionCoordinate <= endBottom ) |
|
154 { |
|
155 return EFalse; |
|
156 } |
|
157 |
|
158 if ( *positionCoordinate < startTop || WorldFitsToView() ) |
|
159 { |
|
160 *positionCoordinate = startTop; |
|
161 } |
|
162 else |
|
163 { |
|
164 *positionCoordinate = endBottom; |
|
165 } |
|
166 return ETrue; |
|
167 } |
|
168 |
|
169 |
|
170 // ----------------------------------------------------------------------------- |
|
171 // CAknPhysicsRestrictor::AllowedViewPosition() |
|
172 // ----------------------------------------------------------------------------- |
|
173 // |
|
174 TBool CAknPhysicsRestrictor::AllowedViewPosition( TPoint& aPosition ) |
|
175 { |
|
176 // No restrictions to empty space, view position always allowed |
|
177 if ( !iEmptySpaceRestricted ) |
|
178 { |
|
179 return ETrue; |
|
180 } |
|
181 |
|
182 TBool allow( EFalse ); |
|
183 |
|
184 TInt *coord; |
|
185 if ( iLandscape ) |
|
186 { |
|
187 coord = &aPosition.iX; |
|
188 } |
|
189 else |
|
190 { |
|
191 coord = &aPosition.iY; |
|
192 } |
|
193 |
|
194 // View position is allowed |
|
195 if ( *coord >= iPositionTopLimit && *coord <= iPositionBottomLimit ) |
|
196 { |
|
197 allow = ETrue; |
|
198 iViewReachedLimit = EFalse; |
|
199 } |
|
200 |
|
201 // View has reached the limit for the first time - adjust the position |
|
202 // exactly to limit position |
|
203 else if ( !iViewReachedLimit ) |
|
204 { |
|
205 allow = ETrue; |
|
206 iViewReachedLimit = ETrue; |
|
207 if ( *coord < iPositionTopLimit ) |
|
208 { |
|
209 *coord = iPositionTopLimit; |
|
210 } |
|
211 else |
|
212 { |
|
213 *coord = iPositionBottomLimit; |
|
214 } |
|
215 } |
|
216 |
|
217 // Else view has already reached the limit, view position is not allowed |
|
218 // and no need to notify physics observer |
|
219 |
|
220 return allow; |
|
221 } |
|
222 |
|
223 |
|
224 // ----------------------------------------------------------------------------- |
|
225 // CAknPhysicsRestrictor::AdjustDragPoint() |
|
226 // ----------------------------------------------------------------------------- |
|
227 // |
|
228 void CAknPhysicsRestrictor::AdjustDragPoint( TPoint& aDragPoint ) |
|
229 { |
|
230 if ( iViewReachedLimit ) |
|
231 { |
|
232 iViewReachedLimit = EFalse; |
|
233 |
|
234 TInt *coord; |
|
235 if ( iLandscape ) |
|
236 { |
|
237 coord = &aDragPoint.iX; |
|
238 } |
|
239 else |
|
240 { |
|
241 coord = &aDragPoint.iY; |
|
242 } |
|
243 |
|
244 if ( *coord < 0 ) |
|
245 { |
|
246 *coord = -iEmptySpaceArea; |
|
247 } |
|
248 else |
|
249 { |
|
250 *coord = iEmptySpaceArea; |
|
251 } |
|
252 } |
|
253 } |
|
254 |
|
255 |
|
256 // ----------------------------------------------------------------------------- |
|
257 // CAknPhysicsRestrictor::WorldSize() |
|
258 // ----------------------------------------------------------------------------- |
|
259 // |
|
260 TSize CAknPhysicsRestrictor::WorldSize() const |
|
261 { |
|
262 return iWorldSize; |
|
263 } |
|
264 |
|
265 |
|
266 // ----------------------------------------------------------------------------- |
|
267 // CAknPhysicsRestrictor::WorldSize() |
|
268 // ----------------------------------------------------------------------------- |
|
269 // |
|
270 TBool CAknPhysicsRestrictor::WorldInLandscape() const |
|
271 { |
|
272 return iLandscape; |
|
273 } |
|
274 |
|
275 |
|
276 // ----------------------------------------------------------------------------- |
|
277 // CAknPhysicsRestrictor::ParameterProvider() |
|
278 // ----------------------------------------------------------------------------- |
|
279 // |
|
280 CAknPhysicsParameterProvider* CAknPhysicsRestrictor::ParameterProvider() const |
|
281 { |
|
282 return iProvider; |
|
283 } |
|
284 |
|
285 |
|
286 // ----------------------------------------------------------------------------- |
|
287 // CAknPhysicsRestrictor::PositionToViewTop() |
|
288 // ----------------------------------------------------------------------------- |
|
289 // |
|
290 void CAknPhysicsRestrictor::PositionToViewTop( TPoint& aPosition ) const |
|
291 { |
|
292 TInt topPos( ViewTopPosition() ); |
|
293 if ( iLandscape ) |
|
294 { |
|
295 aPosition.iX = topPos; |
|
296 } |
|
297 else |
|
298 { |
|
299 aPosition.iY = topPos; |
|
300 } |
|
301 } |
|
302 |
|
303 |
|
304 // ----------------------------------------------------------------------------- |
|
305 // CAknPhysicsRestrictor::PositionToViewBottom() |
|
306 // ----------------------------------------------------------------------------- |
|
307 // |
|
308 void CAknPhysicsRestrictor::PositionToViewBottom( TPoint& aPosition ) const |
|
309 { |
|
310 TInt bottomPos( ViewBottomPosition() ); |
|
311 |
|
312 if ( iLandscape ) |
|
313 { |
|
314 aPosition.iX = bottomPos; |
|
315 } |
|
316 else |
|
317 { |
|
318 aPosition.iY = bottomPos; |
|
319 } |
|
320 } |
|
321 |
|
322 |
|
323 // ----------------------------------------------------------------------------- |
|
324 // CAknPhysicsRestrictor::PositionIsOutOfBoundaries() |
|
325 // ----------------------------------------------------------------------------- |
|
326 // |
|
327 TBool CAknPhysicsRestrictor::PositionIsOutOfBoundaries( |
|
328 const TPoint& aPosition, const TBool& aTopCollision ) const |
|
329 { |
|
330 TInt startTop( ViewTopPosition() ); |
|
331 TInt endBottom( ViewBottomPosition() ); |
|
332 TInt positionCoordinate; |
|
333 |
|
334 if ( iLandscape ) |
|
335 { |
|
336 positionCoordinate = aPosition.iX; |
|
337 } |
|
338 else |
|
339 { |
|
340 positionCoordinate = aPosition.iY; |
|
341 } |
|
342 |
|
343 |
|
344 if ( aTopCollision && positionCoordinate > startTop ) |
|
345 { |
|
346 positionCoordinate = startTop; |
|
347 return ETrue; |
|
348 } |
|
349 else if ( !aTopCollision && positionCoordinate < endBottom ) |
|
350 { |
|
351 positionCoordinate = endBottom; |
|
352 return ETrue; |
|
353 } |
|
354 return EFalse; |
|
355 } |
|
356 |
|
357 |
|
358 // --------------------------------------------------------------------------- |
|
359 // CAknPhysicsRestrictor::CAknPhysicsRestrictor |
|
360 // --------------------------------------------------------------------------- |
|
361 // |
|
362 CAknPhysicsRestrictor::CAknPhysicsRestrictor( |
|
363 CAknPhysicsParameterProvider* aProvider ) |
|
364 : |
|
365 iWorldSize( 0, 0 ), |
|
366 iViewSize( 0, 0 ), |
|
367 iLandscape( EFalse ), |
|
368 iPositionTopLimit( 0 ), |
|
369 iPositionBottomLimit( 0 ), |
|
370 iEmptySpaceArea( 0 ), |
|
371 iProvider( aProvider ), |
|
372 iViewReachedLimit( EFalse ), |
|
373 iEmptySpaceRestricted( EFalse ) |
|
374 { |
|
375 } |
|
376 |
|
377 |
|
378 // --------------------------------------------------------------------------- |
|
379 // CAknPhysicsRestrictor::ConstructL |
|
380 // --------------------------------------------------------------------------- |
|
381 // |
|
382 void CAknPhysicsRestrictor::ConstructL() |
|
383 { |
|
384 } |
|
385 |
|
386 |
|
387 // --------------------------------------------------------------------------- |
|
388 // CAknPhysicsRestrictor::CalculateViewLimits |
|
389 // --------------------------------------------------------------------------- |
|
390 // |
|
391 void CAknPhysicsRestrictor::CalculateViewLimits() |
|
392 { |
|
393 if ( !iProvider ) |
|
394 { |
|
395 return; |
|
396 } |
|
397 |
|
398 TInt viewHeight( iViewSize.iHeight ); |
|
399 TInt worldHeight( iWorldSize.iHeight ); |
|
400 TReal emptySegment( KNotRestrictedSegment ); |
|
401 |
|
402 if ( iLandscape ) |
|
403 { |
|
404 viewHeight = iViewSize.iWidth; |
|
405 worldHeight = iWorldSize.iWidth; |
|
406 } |
|
407 |
|
408 // Calculate bottom limit |
|
409 if ( viewHeight > worldHeight ) |
|
410 { |
|
411 emptySegment = |
|
412 ( TReal ) iProvider->ShortListEmptySpace() / KEmptySpaceFactor; |
|
413 iEmptySpaceArea = |
|
414 worldHeight * ( emptySegment ); |
|
415 iPositionBottomLimit = viewHeight / 2 + iEmptySpaceArea; |
|
416 } |
|
417 else |
|
418 { |
|
419 emptySegment = |
|
420 ( TReal ) iProvider->LongListEmptySpace() / KEmptySpaceFactor; |
|
421 iEmptySpaceArea = |
|
422 viewHeight * ( emptySegment ); |
|
423 iPositionBottomLimit = worldHeight - viewHeight / 2 + iEmptySpaceArea; |
|
424 } |
|
425 |
|
426 // Calculate top limit |
|
427 iPositionTopLimit = viewHeight / 2 - iEmptySpaceArea; |
|
428 |
|
429 // Check if empty space is really restricted |
|
430 if ( emptySegment == KNotRestrictedSegment ) |
|
431 { |
|
432 iEmptySpaceRestricted = EFalse; |
|
433 } |
|
434 else |
|
435 { |
|
436 iEmptySpaceRestricted = ETrue; |
|
437 } |
|
438 } |
|
439 |
|
440 |
|
441 // --------------------------------------------------------------------------- |
|
442 // CAknPhysicsRestrictor::WorldFitsToView |
|
443 // --------------------------------------------------------------------------- |
|
444 // |
|
445 TBool CAknPhysicsRestrictor::WorldFitsToView() |
|
446 { |
|
447 if ( iLandscape && iWorldSize.iWidth < iViewSize.iWidth ) |
|
448 { |
|
449 return ETrue; |
|
450 } |
|
451 else if ( !iLandscape && iWorldSize.iHeight < iViewSize.iHeight ) |
|
452 { |
|
453 return ETrue; |
|
454 } |
|
455 return EFalse; |
|
456 } |
|
457 |