forked from jverkoey/nimbus
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy path_n_i_launcher_view_8m_source.html
563 lines (542 loc) · 38.5 KB
/
_n_i_launcher_view_8m_source.html
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
<title>Nimbus: src/launcher/src/NILauncherView.m Source File</title>
<link href="tabs.css" rel="stylesheet" type="text/css"/>
<link href="navtree.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript" src="resize.js"></script>
<script type="text/javascript" src="navtree.js"></script>
<script type="text/javascript">
$(document).ready(initResizable);
</script>
<link href="stylesheet.css" rel="stylesheet" type="text/css" />
<script type="text/javascript">
var _gaq = _gaq || [];
_gaq.push(['_setAccount', 'UA-24278774-1']);
_gaq.push(['_trackPageview']);
(function() {
var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
})();
</script>
</head>
<body>
<div id="page">
<div style="position:relative">
<div id="top"><!-- do not remove this div! -->
<div id="titlearea">
<a style="float: right;margin-right:20px;margin-top:20px" href='http://www.pledgie.com/campaigns/15519'><img alt='Click here to support Nimbus development and make a donation at www.pledgie.com !' src='http://www.pledgie.com/campaigns/15519.png?skin_name=chrome' border='0' /></a>
<table cellspacing="0" cellpadding="0">
<tbody>
<tr style="height: 56px;">
<td style="padding-left: 0.5em;">
<div id="projectname">Nimbus
 <span id="projectnumber">0.9.2 - <a href="http://github.com/jverkoey/nimbus">Nimbus is proudly hosted on Github</a></span>
</div>
<div id="projectbrief">An iOS framework whose growth is bounded by O(documentation).</div>
</td>
</tr>
</tbody>
</table>
</div>
<!-- Generated by Doxygen 1.7.4-20110629 -->
</div>
<div id="side-nav" class="ui-resizable side-nav-resizable">
<div id="nav-tree">
<div id="nav-tree-contents">
</div>
</div>
<div id="splitbar" style="-moz-user-select:none;"
class="ui-resizable-handle">
</div>
</div>
<script type="text/javascript">
initNavTree('_n_i_launcher_view_8m.html','');
</script>
<div id="doc-content">
<div class="header">
<div class="headertitle">
<div class="title">src/launcher/src/NILauncherView.m</div> </div>
</div>
<div class="contents">
<div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">//</span>
<a name="l00002"></a>00002 <span class="comment">// Copyright 2011 Jeff Verkoeyen</span>
<a name="l00003"></a>00003 <span class="comment">//</span>
<a name="l00004"></a>00004 <span class="comment">// Forked from Three20 June 10, 2011 - Copyright 2009-2011 Facebook</span>
<a name="l00005"></a>00005 <span class="comment">//</span>
<a name="l00006"></a>00006 <span class="comment">// Licensed under the Apache License, Version 2.0 (the "License");</span>
<a name="l00007"></a>00007 <span class="comment">// you may not use this file except in compliance with the License.</span>
<a name="l00008"></a>00008 <span class="comment">// You may obtain a copy of the License at</span>
<a name="l00009"></a>00009 <span class="comment">//</span>
<a name="l00010"></a>00010 <span class="comment">// http://www.apache.org/licenses/LICENSE-2.0</span>
<a name="l00011"></a>00011 <span class="comment">//</span>
<a name="l00012"></a>00012 <span class="comment">// Unless required by applicable law or agreed to in writing, software</span>
<a name="l00013"></a>00013 <span class="comment">// distributed under the License is distributed on an "AS IS" BASIS,</span>
<a name="l00014"></a>00014 <span class="comment">// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span>
<a name="l00015"></a>00015 <span class="comment">// See the License for the specific language governing permissions and</span>
<a name="l00016"></a>00016 <span class="comment">// limitations under the License.</span>
<a name="l00017"></a>00017 <span class="comment">//</span>
<a name="l00018"></a>00018
<a name="l00019"></a>00019 <span class="preprocessor">#import "NILauncherView.h"</span>
<a name="l00020"></a>00020
<a name="l00021"></a>00021 <span class="preprocessor">#import "NimbusCore.h"</span>
<a name="l00022"></a>00022
<a name="l00023"></a>00023 <span class="keyword">const</span> NSInteger NILauncherViewDynamic = -1;
<a name="l00024"></a>00024
<a name="l00025"></a>00025 <span class="keyword">static</span> <span class="keyword">const</span> CGFloat kDefaultButtonDimensions = 80;
<a name="l00026"></a>00026 <span class="keyword">static</span> <span class="keyword">const</span> CGFloat kDefaultPadding = 10;
<a name="l00027"></a>00027 <span class="keyword">static</span> <span class="keyword">const</span> NSTimeInterval kAnimateToPageDuration = 0.2;
<a name="l00028"></a>00028
<a name="l00029"></a>00029
<a name="l00031"></a>00031 <span class="keyword">@interface </span><a class="code" href="interface_n_i_launcher_view.html" title="A launcher view that simulates iOS' home screen launcher functionality.">NILauncherView</a>()
<a name="l00032"></a>00032
<a name="l00033"></a>00033 - (void)layoutPages;
<a name="l00034"></a>00034
<a name="l00035"></a>00035 <span class="keyword">@end</span>
<a name="l00036"></a>00036
<a name="l00037"></a>00037
<a name="l00041"></a>00041 <span class="keyword">@implementation </span><a class="code" href="interface_n_i_launcher_view.html" title="A launcher view that simulates iOS' home screen launcher functionality.">NILauncherView</a>
<a name="l00042"></a>00042
<a name="l00043"></a>00043 <span class="keyword">@synthesize</span> maxNumberOfButtonsPerPage = _maxNumberOfButtonsPerPage;
<a name="l00044"></a>00044
<a name="l00045"></a>00045 <span class="keyword">@synthesize</span> <a class="code" href="interface_n_i_launcher_view.html#ae5a62c785693f02a50ae67792acc664e" title="The amount of padding on each side of the launcher view pages.">padding</a> = _padding;
<a name="l00046"></a>00046
<a name="l00047"></a>00047 <span class="keyword">@synthesize</span> <a class="code" href="interface_n_i_launcher_view.html#a1da7308b8ff117197ba646d7ae53f29a" title="The launcher view notifies the delegate of any user interaction or state changes.">delegate</a> = _delegate;
<a name="l00048"></a>00048 <span class="keyword">@synthesize</span> <a class="code" href="interface_n_i_launcher_view.html#a03a9f61511cf61e94b3d3550a2bb557a" title="The launcher view populates its pages with information from the data source.">dataSource</a> = _dataSource;
<a name="l00049"></a>00049
<a name="l00050"></a>00050
<a name="l00052"></a>00052 - (void)dealloc {
<a name="l00053"></a>00053 <a class="code" href="group___preprocessor-_macros.html#ga5d2e99251aeb3ddb687e27f72336e5db" title="Release and assign nil to an object.">NI_RELEASE_SAFELY</a>(_pager);
<a name="l00054"></a>00054 <a class="code" href="group___preprocessor-_macros.html#ga5d2e99251aeb3ddb687e27f72336e5db" title="Release and assign nil to an object.">NI_RELEASE_SAFELY</a>(_scrollView);
<a name="l00055"></a>00055 <a class="code" href="group___preprocessor-_macros.html#ga5d2e99251aeb3ddb687e27f72336e5db" title="Release and assign nil to an object.">NI_RELEASE_SAFELY</a>(_pagesOfButtons);
<a name="l00056"></a>00056 <a class="code" href="group___preprocessor-_macros.html#ga5d2e99251aeb3ddb687e27f72336e5db" title="Release and assign nil to an object.">NI_RELEASE_SAFELY</a>(_pagesOfScrollViews);
<a name="l00057"></a>00057
<a name="l00058"></a>00058 [<span class="keyword">super</span> dealloc];
<a name="l00059"></a>00059 }
<a name="l00060"></a>00060
<a name="l00061"></a>00061
<a name="l00063"></a>00063 - (id)initWithFrame:(CGRect)frame {
<a name="l00064"></a>00064 <span class="keywordflow">if</span> ((<span class="keyword">self</span> = [super initWithFrame:frame])) {
<a name="l00065"></a>00065 _maxNumberOfButtonsPerPage = NSIntegerMax;
<a name="l00066"></a>00066 _padding = UIEdgeInsetsMake(kDefaultPadding, kDefaultPadding,
<a name="l00067"></a>00067 kDefaultPadding, kDefaultPadding);
<a name="l00068"></a>00068
<a name="l00069"></a>00069 <span class="comment">// The paging scroll view.</span>
<a name="l00070"></a>00070 _scrollView = [[UIScrollView alloc] initWithFrame:self.bounds];
<a name="l00071"></a>00071 _scrollView.delegate = <span class="keyword">self</span>;
<a name="l00072"></a>00072 _scrollView.pagingEnabled = YES;
<a name="l00073"></a>00073
<a name="l00074"></a>00074 <span class="comment">// We don't need scroll indicators because we have a pager. Vertical scrolling is handled</span>
<a name="l00075"></a>00075 <span class="comment">// by each page's scroll view.</span>
<a name="l00076"></a>00076 _scrollView.showsVerticalScrollIndicator = NO;
<a name="l00077"></a>00077 _scrollView.showsHorizontalScrollIndicator = NO;
<a name="l00078"></a>00078
<a name="l00079"></a>00079 [<span class="keyword">self</span> addSubview:_scrollView];
<a name="l00080"></a>00080
<a name="l00081"></a>00081 <span class="comment">// The pager displayed at the bottom of the scroll view.</span>
<a name="l00082"></a>00082 _pager = [[UIPageControl alloc] init];
<a name="l00083"></a>00083 _pager.hidesForSinglePage = YES;
<a name="l00084"></a>00084
<a name="l00085"></a>00085 <span class="comment">// So, this is weird. Apparently if you don't set a background color on the pager control</span>
<a name="l00086"></a>00086 <span class="comment">// then taps won't be handled anywhere but within the dot area. If you do set a background</span>
<a name="l00087"></a>00087 <span class="comment">// color, however, then taps outside of the dot area DO change the selected page.</span>
<a name="l00088"></a>00088 <span class="comment">// \(o.o)/</span>
<a name="l00089"></a>00089 _pager.backgroundColor = [UIColor blackColor];
<a name="l00090"></a>00090 <span class="comment">// Similarly for the scroll view anywhere there isn't a subview.</span>
<a name="l00091"></a>00091 _scrollView.backgroundColor = [UIColor blackColor];
<a name="l00092"></a>00092 <span class="comment">// We update these background colors when the launcher view's own background color is set.</span>
<a name="l00093"></a>00093
<a name="l00094"></a>00094 <span class="comment">// Don't update the pager when the user taps until we've handled the tap ourselves.</span>
<a name="l00095"></a>00095 <span class="comment">// This allows us to reset the page index forcefully if necessary without flickering the</span>
<a name="l00096"></a>00096 <span class="comment">// pager's current selection.</span>
<a name="l00097"></a>00097 _pager.defersCurrentPageDisplay = YES;
<a name="l00098"></a>00098
<a name="l00099"></a>00099 <span class="comment">// When the user taps the pager control it fires a UIControlEventValueChanged notification.</span>
<a name="l00100"></a>00100 [_pager addTarget: self
<a name="l00101"></a>00101 action: @selector(pageChanged:)
<a name="l00102"></a>00102 forControlEvents: UIControlEventValueChanged];
<a name="l00103"></a>00103
<a name="l00104"></a>00104 [<span class="keyword">self</span> addSubview:_pager];
<a name="l00105"></a>00105 }
<a name="l00106"></a>00106 <span class="keywordflow">return</span> <span class="keyword">self</span>;
<a name="l00107"></a>00107 }
<a name="l00108"></a>00108
<a name="l00109"></a>00109
<a name="l00111"></a>00111 - (void)setBackgroundColor:(UIColor *)backgroundColor {
<a name="l00112"></a>00112 [<span class="keyword">super</span> setBackgroundColor:backgroundColor];
<a name="l00113"></a>00113
<a name="l00114"></a>00114 _scrollView.backgroundColor = backgroundColor;
<a name="l00115"></a>00115 _pager.backgroundColor = backgroundColor;
<a name="l00116"></a>00116 }
<a name="l00117"></a>00117
<a name="l00118"></a>00118
<a name="l00120"></a>00120 - (CGFloat)pageWidthForLauncherFrame:(CGRect)frame {
<a name="l00121"></a>00121 <span class="keywordflow">return</span> frame.size.width;
<a name="l00122"></a>00122 }
<a name="l00123"></a>00123
<a name="l00124"></a>00124
<a name="l00126"></a>00126 - (void)setFrame:(CGRect)frame {
<a name="l00127"></a>00127 [<span class="keyword">super</span> setFrame:frame];
<a name="l00128"></a>00128
<a name="l00129"></a>00129 <span class="comment">// Lay out the pager first. The remaining space is used for the launcher scroll view.</span>
<a name="l00130"></a>00130 [_pager sizeToFit];
<a name="l00131"></a>00131 _pager.frame = CGRectMake(0, <span class="keyword">self</span>.frame.size.height - _pager.frame.size.height,
<a name="l00132"></a>00132 <span class="keyword">self</span>.frame.size.width,
<a name="l00133"></a>00133 _pager.frame.size.height);
<a name="l00134"></a>00134
<a name="l00135"></a>00135 CGFloat pageWidth = [<span class="keyword">self</span> pageWidthForLauncherFrame:self.frame];
<a name="l00136"></a>00136
<a name="l00137"></a>00137 <span class="comment">// The scroll view frame takes up the entire launcher view, minus the pager.</span>
<a name="l00138"></a>00138 _scrollView.frame = CGRectMake(0, 0,
<a name="l00139"></a>00139 pageWidth,
<a name="l00140"></a>00140 <span class="keyword">self</span>.frame.size.height - _pager.frame.size.height);
<a name="l00141"></a>00141
<a name="l00142"></a>00142 <span class="comment">// We never want the paging scroll view to scroll vertically, so make sure the content size</span>
<a name="l00143"></a>00143 <span class="comment">// is always exactly the scroll view height.</span>
<a name="l00144"></a>00144 _scrollView.contentSize = CGSizeMake(pageWidth * _numberOfPages,
<a name="l00145"></a>00145 _scrollView.frame.size.height);
<a name="l00146"></a>00146
<a name="l00147"></a>00147 <span class="comment">// We update the content offset so that the scroll view sits on an integral page boundary.</span>
<a name="l00148"></a>00148 <span class="comment">// This is most useful when switching device orientations.</span>
<a name="l00149"></a>00149 _scrollView.contentOffset = CGPointMake([<span class="keyword">self</span> pageWidthForLauncherFrame:frame]
<a name="l00150"></a>00150 * _pager.currentPage,
<a name="l00151"></a>00151 0);
<a name="l00152"></a>00152
<a name="l00153"></a>00153 <span class="comment">// The dimensions of the scroll view may have changed, so lay out all of the pages.</span>
<a name="l00154"></a>00154 [<span class="keyword">self</span> layoutPages];
<a name="l00155"></a>00155
<a name="l00156"></a>00156 <span class="comment">// Example: When switching from a 3x4 grid of 12 items to a 5x2 grid of 10, there will be</span>
<a name="l00157"></a>00157 <span class="comment">// leftover items and the page will be too tall to fit everything as a result. We flash</span>
<a name="l00158"></a>00158 <span class="comment">// the scroll indicators when this happens to indicate to the user that some buttons have been</span>
<a name="l00159"></a>00159 <span class="comment">// hidden.</span>
<a name="l00160"></a>00160 [[_pagesOfScrollViews objectAtIndex:_pager.currentPage] flashScrollIndicators];
<a name="l00161"></a>00161 }
<a name="l00162"></a>00162
<a name="l00163"></a>00163
<a name="l00165"></a>00165
<a name="l00170"></a>00170 - (void)updatePageIndex {
<a name="l00171"></a>00171 CGFloat pageWidth = _scrollView.frame.size.width;
<a name="l00172"></a>00172 NSInteger pageIndex = roundf(_scrollView.contentOffset.x / pageWidth);
<a name="l00173"></a>00173 <span class="keywordflow">if</span> (_pager.currentPage != pageIndex) {
<a name="l00174"></a>00174 _pager.currentPage = pageIndex;
<a name="l00175"></a>00175
<a name="l00176"></a>00176 [[_pagesOfScrollViews objectAtIndex:pageIndex] flashScrollIndicators];
<a name="l00177"></a>00177 }
<a name="l00178"></a>00178 }
<a name="l00179"></a>00179
<a name="l00180"></a>00180
<a name="l00182"></a>00182 - (void)calculateLayoutForFrame: (CGRect)frame
<a name="l00183"></a>00183 buttonDimensions: (CGSize *)pButtonDimensions
<a name="l00184"></a>00184 numberOfRows: (NSInteger *)pNumberOfRows
<a name="l00185"></a>00185 numberOfColumns: (NSInteger *)pNumberOfColumns
<a name="l00186"></a>00186 buttonHorizontalSpacing: (CGFloat *)pButtonHorizontalSpacing
<a name="l00187"></a>00187 buttonVerticalSpacing: (CGFloat *)pButtonVerticalSpacing {
<a name="l00188"></a>00188 NIDASSERT(nil != pButtonDimensions);
<a name="l00189"></a>00189 NIDASSERT(nil != pNumberOfRows);
<a name="l00190"></a>00190 NIDASSERT(nil != pNumberOfColumns);
<a name="l00191"></a>00191 NIDASSERT(nil != pButtonHorizontalSpacing);
<a name="l00192"></a>00192 NIDASSERT(nil != pButtonVerticalSpacing);
<a name="l00193"></a>00193 <span class="keywordflow">if</span> (nil == pButtonDimensions
<a name="l00194"></a>00194 || nil == pNumberOfRows
<a name="l00195"></a>00195 || nil == pNumberOfColumns
<a name="l00196"></a>00196 || nil == pButtonHorizontalSpacing
<a name="l00197"></a>00197 || nil == pButtonVerticalSpacing) {
<a name="l00198"></a>00198 <span class="keywordflow">return</span>;
<a name="l00199"></a>00199 }
<a name="l00200"></a>00200 CGFloat pageWidth = frame.size.width - _padding.left - _padding.right;
<a name="l00201"></a>00201 CGFloat pageHeight = frame.size.height - _padding.top - _padding.bottom;
<a name="l00202"></a>00202
<a name="l00203"></a>00203 CGSize buttonDimensions = CGSizeMake(kDefaultButtonDimensions, kDefaultButtonDimensions);
<a name="l00204"></a>00204 <span class="keywordflow">if</span> ([<span class="keyword">self</span>.<a class="code" href="interface_n_i_launcher_view.html#a03a9f61511cf61e94b3d3550a2bb557a" title="The launcher view populates its pages with information from the data source.">dataSource</a> respondsToSelector:<span class="keyword">@selector</span>(buttonDimensionsInLauncherView:)]) {
<a name="l00205"></a>00205 CGSize dataSourceButtonDimensions = [<span class="keyword">self</span>.dataSource buttonDimensionsInLauncherView:self];
<a name="l00206"></a>00206
<a name="l00207"></a>00207 NIDASSERT(dataSourceButtonDimensions.width > 0 && dataSourceButtonDimensions.height > 0);
<a name="l00208"></a>00208 <span class="keywordflow">if</span> (dataSourceButtonDimensions.width > 0 && dataSourceButtonDimensions.height > 0) {
<a name="l00209"></a>00209 buttonDimensions = dataSourceButtonDimensions;
<a name="l00210"></a>00210 }
<a name="l00211"></a>00211 }
<a name="l00212"></a>00212
<a name="l00213"></a>00213 NSInteger numberOfColumns = NILauncherViewDynamic;
<a name="l00214"></a>00214 NSInteger numberOfRows = NILauncherViewDynamic;
<a name="l00215"></a>00215
<a name="l00216"></a>00216 <span class="keywordflow">if</span> ([<span class="keyword">self</span>.<a class="code" href="interface_n_i_launcher_view.html#a03a9f61511cf61e94b3d3550a2bb557a" title="The launcher view populates its pages with information from the data source.">dataSource</a> respondsToSelector:<span class="keyword">@selector</span>(numberOfColumnsPerPageInLauncherView:)]) {
<a name="l00217"></a>00217 numberOfColumns = [<span class="keyword">self</span>.dataSource numberOfColumnsPerPageInLauncherView:self];
<a name="l00218"></a>00218 }
<a name="l00219"></a>00219 <span class="keywordflow">if</span> ([<span class="keyword">self</span>.<a class="code" href="interface_n_i_launcher_view.html#a03a9f61511cf61e94b3d3550a2bb557a" title="The launcher view populates its pages with information from the data source.">dataSource</a> respondsToSelector:<span class="keyword">@selector</span>(numberOfRowsPerPageInLauncherView:)]) {
<a name="l00220"></a>00220 numberOfRows = [<span class="keyword">self</span>.dataSource numberOfRowsPerPageInLauncherView:self];
<a name="l00221"></a>00221 }
<a name="l00222"></a>00222
<a name="l00223"></a>00223 <span class="keywordflow">if</span> (NILauncherViewDynamic == numberOfColumns) {
<a name="l00224"></a>00224 numberOfColumns = floorf(pageWidth / buttonDimensions.width);
<a name="l00225"></a>00225 }
<a name="l00226"></a>00226 <span class="keywordflow">if</span> (NILauncherViewDynamic == numberOfRows) {
<a name="l00227"></a>00227 numberOfRows = floorf(pageHeight / buttonDimensions.height);
<a name="l00228"></a>00228 }
<a name="l00229"></a>00229 NIDASSERT(numberOfRows > 0);
<a name="l00230"></a>00230 NIDASSERT(numberOfColumns > 0);
<a name="l00231"></a>00231 numberOfRows = MAX(1, numberOfRows);
<a name="l00232"></a>00232 numberOfColumns = MAX(1, numberOfColumns);
<a name="l00233"></a>00233
<a name="l00234"></a>00234 CGFloat totalButtonWidth = numberOfColumns * buttonDimensions.width;
<a name="l00235"></a>00235 CGFloat buttonHorizontalSpacing = 0;
<a name="l00236"></a>00236 <span class="keywordflow">if</span> (numberOfColumns > 1) {
<a name="l00237"></a>00237 buttonHorizontalSpacing = floorf((pageWidth - totalButtonWidth) / (numberOfColumns - 1));
<a name="l00238"></a>00238 }
<a name="l00239"></a>00239 CGFloat totalButtonHeight = numberOfRows * buttonDimensions.height;
<a name="l00240"></a>00240 CGFloat buttonVerticalSpacing = 0;
<a name="l00241"></a>00241 <span class="keywordflow">if</span> (numberOfRows > 1) {
<a name="l00242"></a>00242 buttonVerticalSpacing = floorf((pageHeight - totalButtonHeight) / (numberOfRows - 1));
<a name="l00243"></a>00243 }
<a name="l00244"></a>00244
<a name="l00245"></a>00245 *pButtonDimensions = buttonDimensions;
<a name="l00246"></a>00246 *pNumberOfRows = numberOfRows;
<a name="l00247"></a>00247 *pNumberOfColumns = numberOfColumns;
<a name="l00248"></a>00248 *pButtonHorizontalSpacing = buttonHorizontalSpacing;
<a name="l00249"></a>00249 *pButtonVerticalSpacing = buttonVerticalSpacing;
<a name="l00250"></a>00250 }
<a name="l00251"></a>00251
<a name="l00252"></a>00252
<a name="l00254"></a>00254 - (void)layoutPages {
<a name="l00255"></a>00255 <span class="keywordflow">if</span> (nil == _scrollView || CGRectIsEmpty(_scrollView.frame)) {
<a name="l00256"></a>00256 <span class="comment">// Bail out early; the scroll view hasn't been laid out yet.</span>
<a name="l00257"></a>00257 <span class="keywordflow">return</span>;
<a name="l00258"></a>00258 }
<a name="l00259"></a>00259
<a name="l00260"></a>00260 CGSize buttonDimensions = CGSizeZero;
<a name="l00261"></a>00261 NSInteger numberOfRows = 0;
<a name="l00262"></a>00262 NSInteger numberOfColumns = 0;
<a name="l00263"></a>00263 CGFloat buttonHorizontalSpacing = 0;
<a name="l00264"></a>00264 CGFloat buttonVerticalSpacing = 0;
<a name="l00265"></a>00265 [<span class="keyword">self</span> calculateLayoutForFrame: _scrollView.frame
<a name="l00266"></a>00266 buttonDimensions: &buttonDimensions
<a name="l00267"></a>00267 numberOfRows: &numberOfRows
<a name="l00268"></a>00268 numberOfColumns: &numberOfColumns
<a name="l00269"></a>00269 buttonHorizontalSpacing: &buttonHorizontalSpacing
<a name="l00270"></a>00270 buttonVerticalSpacing: &buttonVerticalSpacing];
<a name="l00271"></a>00271
<a name="l00272"></a>00272 NIDASSERT(numberOfRows > 0);
<a name="l00273"></a>00273 NIDASSERT(numberOfColumns > 0);
<a name="l00274"></a>00274
<a name="l00275"></a>00275 CGFloat pageWidth = _scrollView.frame.size.width;
<a name="l00276"></a>00276
<a name="l00277"></a>00277 <span class="keywordflow">for</span> (NSInteger ixPage = 0; ixPage < [_pagesOfButtons count]; ++ixPage) {
<a name="l00278"></a>00278 CGFloat pageOffset = ixPage * pageWidth;
<a name="l00279"></a>00279
<a name="l00280"></a>00280 NSArray* page = [_pagesOfButtons objectAtIndex:ixPage];
<a name="l00281"></a>00281
<a name="l00282"></a>00282 CGFloat pageBottom = 0;
<a name="l00283"></a>00283
<a name="l00284"></a>00284 <span class="keywordflow">for</span> (NSInteger ixItem = 0; ixItem < [page count]; ++ixItem) {
<a name="l00285"></a>00285 NSInteger col = ixItem % numberOfColumns;
<a name="l00286"></a>00286 NSInteger row = ixItem / numberOfColumns;
<a name="l00287"></a>00287
<a name="l00288"></a>00288 UIButton* button = [page objectAtIndex:ixItem];
<a name="l00289"></a>00289 button.frame = CGRectMake(_padding.left + col * buttonDimensions.width
<a name="l00290"></a>00290 + (col * buttonHorizontalSpacing),
<a name="l00291"></a>00291 _padding.top + row * buttonDimensions.height
<a name="l00292"></a>00292 + (row * buttonVerticalSpacing),
<a name="l00293"></a>00293 buttonDimensions.width, buttonDimensions.height);
<a name="l00294"></a>00294
<a name="l00295"></a>00295 pageBottom = MAX(pageBottom, CGRectGetMaxY(button.frame));
<a name="l00296"></a>00296 }
<a name="l00297"></a>00297
<a name="l00298"></a>00298 UIScrollView* pageScrollView = [_pagesOfScrollViews objectAtIndex:ixPage];
<a name="l00299"></a>00299 pageScrollView.frame = CGRectMake(pageOffset, 0, pageWidth, _scrollView.frame.size.height);
<a name="l00300"></a>00300 pageScrollView.contentSize = CGSizeMake(pageWidth, pageBottom + _padding.bottom);
<a name="l00301"></a>00301 }
<a name="l00302"></a>00302 }
<a name="l00303"></a>00303
<a name="l00304"></a>00304
<a name="l00307"></a>00307 <span class="preprocessor">#pragma mark -</span>
<a name="l00308"></a>00308 <span class="preprocessor"></span><span class="preprocessor">#pragma mark UIScrollViewDelegate</span>
<a name="l00309"></a>00309 <span class="preprocessor"></span>
<a name="l00310"></a>00310
<a name="l00312"></a>00312 - (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate {
<a name="l00313"></a>00313 <span class="keywordflow">if</span> (!decelerate) {
<a name="l00314"></a>00314 [<span class="keyword">self</span> updatePageIndex];
<a name="l00315"></a>00315 } <span class="comment">// otherwise we update the page index when the scroll finishes decelerating.</span>
<a name="l00316"></a>00316 }
<a name="l00317"></a>00317
<a name="l00318"></a>00318
<a name="l00320"></a>00320 - (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView {
<a name="l00321"></a>00321 [<span class="keyword">self</span> updatePageIndex];
<a name="l00322"></a>00322 }
<a name="l00323"></a>00323
<a name="l00324"></a>00324
<a name="l00327"></a>00327 <span class="preprocessor">#pragma mark -</span>
<a name="l00328"></a>00328 <span class="preprocessor"></span><span class="preprocessor">#pragma mark UIPageControl Change Notifications</span>
<a name="l00329"></a>00329 <span class="preprocessor"></span>
<a name="l00330"></a>00330
<a name="l00332"></a>00332 - (void)flashCurrentPageScrollIndicators {
<a name="l00333"></a>00333 [[_pagesOfScrollViews objectAtIndex:_pager.currentPage] flashScrollIndicators];
<a name="l00334"></a>00334 }
<a name="l00335"></a>00335
<a name="l00336"></a>00336
<a name="l00338"></a>00338 - (void)pageChanged:(UIPageControl*)pager {
<a name="l00339"></a>00339 [UIView beginAnimations:nil context:nil];
<a name="l00340"></a>00340 [UIView setAnimationDuration:kAnimateToPageDuration];
<a name="l00341"></a>00341 [UIView setAnimationCurve:UIViewAnimationCurveEaseOut];
<a name="l00342"></a>00342 [UIView setAnimationBeginsFromCurrentState:YES];
<a name="l00343"></a>00343 [UIView setAnimationDelegate:self];
<a name="l00344"></a>00344 [UIView setAnimationDidStopSelector:@selector(flashCurrentPageScrollIndicators)];
<a name="l00345"></a>00345
<a name="l00346"></a>00346 _scrollView.contentOffset = CGPointMake([<span class="keyword">self</span> pageWidthForLauncherFrame:<span class="keyword">self</span>.frame]
<a name="l00347"></a>00347 * _pager.currentPage,
<a name="l00348"></a>00348 _scrollView.contentOffset.y);
<a name="l00349"></a>00349
<a name="l00350"></a>00350 [UIView commitAnimations];
<a name="l00351"></a>00351
<a name="l00352"></a>00352 <span class="comment">// Once we've handled the page change notification, notify the pager that it's ok to update</span>
<a name="l00353"></a>00353 <span class="comment">// the page display.</span>
<a name="l00354"></a>00354 [_pager updateCurrentPageDisplay];
<a name="l00355"></a>00355 }
<a name="l00356"></a>00356
<a name="l00357"></a>00357
<a name="l00360"></a>00360 <span class="preprocessor">#pragma mark -</span>
<a name="l00361"></a>00361 <span class="preprocessor"></span><span class="preprocessor">#pragma mark Actions</span>
<a name="l00362"></a>00362 <span class="preprocessor"></span>
<a name="l00363"></a>00363
<a name="l00365"></a>00365
<a name="l00373"></a>00373 - (BOOL)pageAndIndexOfButton: (UIButton *)searchButton
<a name="l00374"></a>00374 page: (NSInteger *)pPage
<a name="l00375"></a>00375 index: (NSInteger *)pIndex {
<a name="l00376"></a>00376 NIDASSERT(nil != pPage);
<a name="l00377"></a>00377 NIDASSERT(nil != pIndex);
<a name="l00378"></a>00378 <span class="keywordflow">if</span> (nil == pPage
<a name="l00379"></a>00379 || nil == pIndex) {
<a name="l00380"></a>00380 <span class="keywordflow">return</span> NO;
<a name="l00381"></a>00381 }
<a name="l00382"></a>00382
<a name="l00383"></a>00383 <span class="keywordflow">for</span> (NSInteger ixPage = 0; ixPage < [_pagesOfButtons count]; ++ixPage) {
<a name="l00384"></a>00384 NSArray* page = [_pagesOfButtons objectAtIndex:ixPage];
<a name="l00385"></a>00385 <span class="keywordflow">for</span> (NSInteger ixButton = 0; ixButton < [page count]; ++ixButton) {
<a name="l00386"></a>00386 UIButton* button = [page objectAtIndex:ixButton];
<a name="l00387"></a>00387 <span class="keywordflow">if</span> (button == searchButton) {
<a name="l00388"></a>00388 *pPage = ixPage;
<a name="l00389"></a>00389 *pIndex = ixButton;
<a name="l00390"></a>00390 <span class="keywordflow">return</span> YES;
<a name="l00391"></a>00391 }
<a name="l00392"></a>00392 }
<a name="l00393"></a>00393 }
<a name="l00394"></a>00394
<a name="l00395"></a>00395 <span class="keywordflow">return</span> NO;
<a name="l00396"></a>00396 }
<a name="l00397"></a>00397
<a name="l00398"></a>00398
<a name="l00400"></a>00400 - (void)didTapButton:(UIButton *)tappedButton {
<a name="l00401"></a>00401 NSInteger page = -1;
<a name="l00402"></a>00402 NSInteger buttonIndex = 0;
<a name="l00403"></a>00403 <span class="keywordflow">if</span> ([<span class="keyword">self</span> pageAndIndexOfButton:tappedButton
<a name="l00404"></a>00404 page:&page
<a name="l00405"></a>00405 index:&buttonIndex]) {
<a name="l00406"></a>00406
<a name="l00407"></a>00407 <span class="keywordflow">if</span> ([<span class="keyword">self</span>.<a class="code" href="interface_n_i_launcher_view.html#a1da7308b8ff117197ba646d7ae53f29a" title="The launcher view notifies the delegate of any user interaction or state changes.">delegate</a> respondsToSelector:
<a name="l00408"></a>00408 <span class="keyword">@selector</span>(launcherView:didSelectButton:onPage:atIndex:)]) {
<a name="l00409"></a>00409 [<span class="keyword">self</span>.delegate launcherView: self
<a name="l00410"></a>00410 didSelectButton: tappedButton
<a name="l00411"></a>00411 onPage: page
<a name="l00412"></a>00412 atIndex: buttonIndex];
<a name="l00413"></a>00413 }
<a name="l00414"></a>00414
<a name="l00415"></a>00415 } <span class="keywordflow">else</span> {
<a name="l00416"></a>00416 <span class="comment">// How exactly did we tap a button that wasn't a part of the launcher view?</span>
<a name="l00417"></a>00417 NIDASSERT(NO);
<a name="l00418"></a>00418 }
<a name="l00419"></a>00419 }
<a name="l00420"></a>00420
<a name="l00421"></a>00421
<a name="l00424"></a>00424 <span class="preprocessor">#pragma mark -</span>
<a name="l00425"></a>00425 <span class="preprocessor"></span><span class="preprocessor">#pragma mark Public Methods</span>
<a name="l00426"></a>00426 <span class="preprocessor"></span>
<a name="l00427"></a>00427
<a name="l00429"></a><a class="code" href="interface_n_i_launcher_view.html#a00cd8720501ea27c466fa6e2201d41d4">00429</a> - (void)<a class="code" href="interface_n_i_launcher_view.html#a00cd8720501ea27c466fa6e2201d41d4" title="Reload the launcher data.">reloadData</a> {
<a name="l00430"></a>00430 _numberOfPages = [<span class="keyword">self</span>.dataSource numberOfPagesInLauncherView:self];
<a name="l00431"></a>00431
<a name="l00432"></a>00432 _pager.numberOfPages = _numberOfPages;
<a name="l00433"></a>00433
<a name="l00434"></a>00434 <span class="comment">// FEATURE: Remember the current page?</span>
<a name="l00435"></a>00435
<a name="l00436"></a>00436 _scrollView.contentSize = CGSizeMake(_scrollView.frame.size.width * _numberOfPages,
<a name="l00437"></a>00437 _scrollView.frame.size.height);
<a name="l00438"></a>00438
<a name="l00439"></a>00439 <span class="comment">// Remove the views from the view hierarchy before we clobber the collections.</span>
<a name="l00440"></a>00440 <span class="keywordflow">for</span> (NSArray* page in _pagesOfButtons) {
<a name="l00441"></a>00441 <span class="keywordflow">for</span> (UIButton* button in page) {
<a name="l00442"></a>00442 [button removeFromSuperview];
<a name="l00443"></a>00443 }
<a name="l00444"></a>00444 }
<a name="l00445"></a>00445 <span class="keywordflow">for</span> (UIScrollView* scrollView in _pagesOfScrollViews) {
<a name="l00446"></a>00446 [scrollView removeFromSuperview];
<a name="l00447"></a>00447 }
<a name="l00448"></a>00448
<a name="l00449"></a>00449 <a class="code" href="group___preprocessor-_macros.html#ga5d2e99251aeb3ddb687e27f72336e5db" title="Release and assign nil to an object.">NI_RELEASE_SAFELY</a>(_pagesOfButtons);
<a name="l00450"></a>00450 <a class="code" href="group___preprocessor-_macros.html#ga5d2e99251aeb3ddb687e27f72336e5db" title="Release and assign nil to an object.">NI_RELEASE_SAFELY</a>(_pagesOfScrollViews);
<a name="l00451"></a>00451
<a name="l00452"></a>00452 <span class="comment">// We query the data source for all of the button views. Each page of buttons lives within</span>
<a name="l00453"></a>00453 <span class="comment">// a scroll view that will scroll vertically if there are too many buttons for the page.</span>
<a name="l00454"></a>00454
<a name="l00455"></a>00455 _pagesOfButtons = [[NSMutableArray alloc] initWithCapacity:_numberOfPages];
<a name="l00456"></a>00456 _pagesOfScrollViews = [[NSMutableArray alloc] initWithCapacity:_numberOfPages];
<a name="l00457"></a>00457 <span class="keywordflow">for</span> (NSInteger ixPage = 0; ixPage < _numberOfPages; ++ixPage) {
<a name="l00458"></a>00458 NSInteger numberOfItems = MIN(_maxNumberOfButtonsPerPage,
<a name="l00459"></a>00459 [<span class="keyword">self</span>.<a class="code" href="interface_n_i_launcher_view.html#a03a9f61511cf61e94b3d3550a2bb557a" title="The launcher view populates its pages with information from the data source.">dataSource</a> launcherView: <span class="keyword">self</span>
<a name="l00460"></a>00460 numberOfButtonsInPage: ixPage]);
<a name="l00461"></a>00461
<a name="l00462"></a>00462 NSMutableArray* page = [[[NSMutableArray alloc] initWithCapacity:numberOfItems]
<a name="l00463"></a>00463 autorelease];
<a name="l00464"></a>00464
<a name="l00465"></a>00465 UIScrollView* pageScrollView = [[[UIScrollView alloc] init] autorelease];
<a name="l00466"></a>00466 pageScrollView.indicatorStyle = UIScrollViewIndicatorStyleWhite;
<a name="l00467"></a>00467
<a name="l00468"></a>00468 <span class="keywordflow">for</span> (NSInteger ixItem = 0 ; ixItem < numberOfItems; ++ixItem) {
<a name="l00469"></a>00469 UIButton* item = [<span class="keyword">self</span>.dataSource launcherView: self
<a name="l00470"></a>00470 buttonForPage: ixPage
<a name="l00471"></a>00471 atIndex: ixItem];
<a name="l00472"></a>00472 [item addTarget: self
<a name="l00473"></a>00473 action: @selector(didTapButton:)
<a name="l00474"></a>00474 forControlEvents: UIControlEventTouchUpInside];
<a name="l00475"></a>00475 [page addObject:item];
<a name="l00476"></a>00476 [pageScrollView addSubview:item];
<a name="l00477"></a>00477 }
<a name="l00478"></a>00478
<a name="l00479"></a>00479 [_scrollView addSubview:pageScrollView];
<a name="l00480"></a>00480
<a name="l00481"></a>00481 [_pagesOfScrollViews addObject:pageScrollView];
<a name="l00482"></a>00482 [_pagesOfButtons addObject:page];
<a name="l00483"></a>00483 }
<a name="l00484"></a>00484
<a name="l00485"></a>00485 [<span class="keyword">self</span> layoutPages];
<a name="l00486"></a>00486 }
<a name="l00487"></a>00487
<a name="l00488"></a>00488
<a name="l00489"></a>00489 <span class="keyword">@end</span>
</pre></div><div id="disqus_thread"></div></div>
</div>
<div id="nav-path" class="navpath">
<ul>
<li class="navelem"><b>NILauncherView.m</b> </li>
</div><!-- .fixedwidth -->
<script type="text/javascript">
/* * * CONFIGURATION VARIABLES: EDIT BEFORE PASTING INTO YOUR WEBPAGE * * */
var disqus_shortname = 'nimbusdocumentation'; // required: replace example with your forum shortname
// The following are highly recommended additional parameters. Remove the slashes in front to use.
// var disqus_identifier = 'unique_dynamic_id_1234';
// var disqus_url = 'http://example.com/permalink-to-page.html';
/* * * DON'T EDIT BELOW THIS LINE * * */
(function() {
var dsq = document.createElement('script'); dsq.type = 'text/javascript'; dsq.async = true;
dsq.src = 'http://' + disqus_shortname + '.disqus.com/embed.js';
(document.getElementsByTagName('head')[0] || document.getElementsByTagName('body')[0]).appendChild(dsq);
})();
</script>
<span class="footer">Generated for Nimbus by
<a href="http://www.doxygen.org/index.html">
<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.7.4-20110629 </span>
</ul>
</div>
</div> <!-- page -->
</body>
</html>