-
Notifications
You must be signed in to change notification settings - Fork 3
/
listing9.html
executable file
·425 lines (366 loc) · 12.6 KB
/
listing9.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
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd">
<html>
<head>
<!-- BEGIN META TAG INFO -->
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<link rel="home" href="http://developer.apple.com/">
<link rel="find" href="http://developer.apple.com/search/">
<link rel="stylesheet" type="text/css" href="../../documentation/css/adcstyle.css" title="fonts">
<script language="JavaScript" src="../../documentation/js/adc.js" type="text/javascript"></script>
<!-- END META TAG INFO -->
<!-- BEGIN TITLE -->
<title>Quartz 2D Shadings - /ShadingView.m</title>
<!-- END TITLE -->
<script language="JavaScript">
function JumpToNewPage() {
window.location=document.scpopupmenu.gotop.value;
return true;
}
</script>
</head>
<!-- BEGIN BODY OPEN -->
<body>
<!--END BODY OPEN -->
<!-- START CENTER OPEN -->
<center>
<!-- END CENTER OPEN -->
<!-- BEGIN LOGO AND SEARCH -->
<!--#include virtual="/includes/adcnavbar"-->
<!-- END LOGO AND SEARCH -->
<!-- START BREADCRUMB -->
<div id="breadcrumb">
<table width="680" border="0" cellpadding="0" cellspacing="0">
<tr>
<td scope="row"><img width="340" height="10" src="images/1dot.gif" alt=""></td>
<td><img width="340" height="10" src="images/1dot.gif" alt=""></td>
</tr>
<tr valign="middle">
<td align="left" colspan="2">
<a href="http://developer.apple.com/">ADC Home</a> > <a href="../../referencelibrary/index.html">Reference Library</a> > <a href="../../samplecode/index.html">Sample Code</a> > <a href="../../samplecode/GraphicsImaging/index.html">Graphics & Imaging</a> > <a href="../../samplecode/GraphicsImaging/idxQuartz-date.html">Quartz</a> > <A HREF="javascript:location.replace('index.html');">Quartz 2D Shadings</A> >
</td>
</tr>
<tr>
<td colspan="2" scope="row"><img width="680" height="35" src="images/1dot.gif" alt=""></td>
</tr>
</table>
</div>
<!-- END BREADCRUMB -->
<!-- START MAIN CONTENT -->
<!-- START TITLE GRAPHIC AND INTRO-->
<table width="680" border="0" cellpadding="0" cellspacing="0">
<tr align="left" valign="top">
<td><h1><div id="pagehead">Quartz 2D Shadings</div></h1></td>
</tr>
</table>
<!-- END TITLE GRAPHIC AND INTRO -->
<!-- START WIDE COLUMN -->
<table width="680" border="0" cellpadding="0" cellspacing="0">
<tr align="left" valign="top">
<td id="scdetails">
<h2>/ShadingView.m</h2>
<form name="scpopupmenu" onSubmit="return false;" method=post>
<p><strong>View Source Code:</strong>
<select name="gotop" onChange="JumpToNewPage();" style="width:340px"><option selected value="ingnore">Select File</option>
<option value="listing1.html">/GradientView.h</option>
<option value="listing2.html">/GradientView.m</option>
<option value="listing3.html">/main.m</option>
<option value="listing4.html">/PreviewView.h</option>
<option value="listing5.html">/PreviewView.m</option>
<option value="listing6.html">/QuartzDrawing.c</option>
<option value="listing7.html">/QuartzDrawing.h</option>
<option value="listing8.html">/ShadingView.h</option>
<option value="listing9.html">/ShadingView.m</option>
<option value="listing10.html">/WindowController.h</option>
<option value="listing11.html">/WindowController.m</option></select>
</p>
</form>
<p><strong><a href="Quartz2DShadings.zip">Download Sample</a></strong> (“Quartz2DShadings.zip”, 193.7K)<BR>
<strong><a href="Quartz2DShadings.dmg">Download Sample</a></strong> (“Quartz2DShadings.dmg”, 259.8K)</p>
<!--
<p><strong><a href="#">Download Sample</a></strong> (“filename.sit”, 500K)</p>
-->
</td>
</tr>
<tr>
<td scope="row"><img width="680" height="10" src="images/1dot.gif" alt=""><br>
<img height="1" width="680" src="images/1dot_919699.gif" alt=""><br>
<img width="680" height="20" src="images/1dot.gif" alt=""></td>
</tr>
<tr>
<td scope="row">
<!--googleon: index -->
<pre class="sourcecodebox">/*
File: ShadingView.m
Abstract: Implements a view that uses a CGFunctionRef, CGShadingRef
and the given parameters to render a gradient within it's bounds.
Version: 1.0
Disclaimer: IMPORTANT: This Apple software is supplied to you by
Apple Inc. ("Apple") in consideration of your agreement to the
following terms, and your use, installation, modification or
redistribution of this Apple software constitutes acceptance of these
terms. If you do not agree with these terms, please do not use,
install, modify or redistribute this Apple software.
In consideration of your agreement to abide by the following terms, and
subject to these terms, Apple grants you a personal, non-exclusive
license, under Apple's copyrights in this original Apple software (the
"Apple Software"), to use, reproduce, modify and redistribute the Apple
Software, with or without modifications, in source and/or binary forms;
provided that if you redistribute the Apple Software in its entirety and
without modifications, you must retain this notice and the following
text and disclaimers in all such redistributions of the Apple Software.
Neither the name, trademarks, service marks or logos of Apple Inc.
may be used to endorse or promote products derived from the Apple
Software without specific prior written permission from Apple. Except
as expressly stated in this notice, no other rights or licenses, express
or implied, are granted by Apple herein, including but not limited to
any patent rights that may be infringed by your derivative works or by
other works in which the Apple Software may be incorporated.
The Apple Software is provided by Apple on an "AS IS" basis. APPLE
MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND
OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.
IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL
OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION,
MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED
AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE),
STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
Copyright (C) 2007 Apple Inc. All Rights Reserved.
*/
#import "QuartzDrawing.h"
#import "ShadingView.h"
@implementation ShadingView
- (id)initWithFrame:(NSRect)frameRect
{
self = [super initWithFrame:frameRect];
if(self != nil)
{
// Default to a square clipping area,
// linear gradient, show the clip & end points,
// and don't extend past start or end point.
shape = 0;
type = 0;
shadingFunction = NULL;
shading = NULL;
showClip = showEndpoints = true;
extendStart = extendEnd = false;
}
return self;
}
-(void)dealloc
{
CGShadingRelease(shading);
CGFunctionRelease(shadingFunction);
[super dealloc];
}
-(void)drawRect:(NSRect)rect
{
// Obtain the current context
CGContextRef context = (CGContextRef)[[NSGraphicsContext currentContext] graphicsPort];
// Move 0,0 to the center of the view
CGContextTranslateCTM(context, rect.size.width / 2.0, rect.size.height / 2.0);
CGContextSaveGState(context);
// Scale the coordinate system to -1,1 on both axies.
CGContextScaleCTM(context, rect.size.width / 2.0, rect.size.height / 2.0);
// Clip to the correct shape.
switch(shape)
{
case 0: // Square
CGContextAddPath(context, GetSquarePath());
CGContextClip(context);
break;
case 1: // Circle
CGContextAddPath(context, GetCirclePath());
CGContextClip(context);
break;
case 2: // Filled Star
CGContextAddPath(context, GetStarPath());
CGContextClip(context);
break;
case 3: // Hollow Star
CGContextAddPath(context, GetStarPath());
CGContextEOClip(context);
break;
}
// If the shading function has been set, but the shading hasn't been created yet
// create the correct shading function for this view.
if((shading == NULL) && (shadingFunction != NULL))
{
switch(type)
{
case 0: // Linear (perpendicular to the line from startPoint to endPoint)
shading = CGShadingCreateAxial(GetGenericRGBColorspace(), startPoint, endPoint, shadingFunction, extendStart, extendEnd);
break;
case 1: // Radial (concentric circles, interpolating radius from startRadius to endRadius,
//and center from startPoint to endPoint)
shading = CGShadingCreateRadial(GetGenericRGBColorspace(), startPoint, startRadius, endPoint, endRadius, shadingFunction, extendStart, extendEnd);
break;
}
}
// If we need to show the clipping region, then add a black fill with 25% opacity.
if(showClip)
{
CGContextSetGrayFillColor(context, 0.0, 0.25);
CGContextFillRect(context, CGRectMake(-1.0, -1.0, 2.0, 2.0));
}
// Draw the shading
if(shading != NULL)
{
CGContextDrawShading(context, shading);
}
CGContextRestoreGState(context);
// If we need to show the endpoints, then draw them.
if(showEndpoints)
{
DrawEmbellishments(context, NSSizeToCGSize(rect.size), startPoint, startRadius, endPoint, endRadius, type == 1);
}
}
-(void)setShapeSquare
{
shape = 0;
[self setNeedsDisplay:YES];
}
-(void)setShapeCircle
{
shape = 1;
[self setNeedsDisplay:YES];
}
-(void)setShapeFilledStar
{
shape = 2;
[self setNeedsDisplay:YES];
}
-(void)setShapeHollowStar
{
shape = 3;
[self setNeedsDisplay:YES];
}
// Called when the shading needs to be reset (so that it will be recreated later)
// This is called when any of the shading parameters are changed.
-(void)clearShading
{
CGShadingRelease(shading);
shading = NULL;
}
-(void)setTypeAxial
{
if(type != 0)
{
type = 0;
[self clearShading];
[self setNeedsDisplay:YES];
}
}
-(void)setTypeRadial
{
if(type != 1)
{
type = 1;
[self clearShading];
[self setNeedsDisplay:YES];
}
}
-(void)setExtendStart:(BOOL)extend
{
if(extend != extendStart)
{
extendStart = extend;
[self clearShading];
[self setNeedsDisplay:YES];
}
}
-(void)setExtendEnd:(BOOL)extend
{
if(extend != extendEnd)
{
extendEnd = extend;
[self clearShading];
[self setNeedsDisplay:YES];
}
}
-(void)setStartPoint:(CGPoint)p
{
startPoint = p;
[self clearShading];
[self setNeedsDisplay:YES];
}
-(void)setEndPoint:(CGPoint)p
{
endPoint = p;
[self clearShading];
[self setNeedsDisplay:YES];
}
-(void)setStartRadius:(CGFloat)r
{
startRadius = r;
[self clearShading];
[self setNeedsDisplay:YES];
}
-(void)setEndRadius:(CGFloat)r
{
endRadius = r;
[self clearShading];
[self setNeedsDisplay:YES];
}
-(void)setShowClip:(BOOL)yn
{
showClip = yn;
[self setNeedsDisplay:YES];
}
-(void)setShowEndpoints:(BOOL)yn
{
showEndpoints = yn;
[self setNeedsDisplay:YES];
}
-(void)setShadingFunction:(CGFunctionRef)f
{
if(f != shadingFunction)
{
CGFunctionRelease(shadingFunction);
CGFunctionRetain(f);
shadingFunction = f;
}
[self clearShading];
[self setNeedsDisplay:YES];
}
@end
</pre>
<!--googleoff: index -->
</td>
</tr>
</table>
<!-- END WIDE COLUMN -->
<!-- END MAIN CONTENT -->
<table width="680" border="0" cellpadding="0" cellspacing="0">
<tr>
<td><div style="width: 100%; height: 1px; background-color: #919699; margin-top: 5px; margin-bottom: 15px"></div></td>
</tr>
<tr>
<td align="center"><br/>
<table border="0" cellpadding="0" cellspacing="0" class="graybox">
<tr>
<th>Did this document help you?</th>
</tr>
<tr>
<td>
<div style="margin-bottom: 8px"><a href="http://developer.apple.com/feedback/?v=1&url=/samplecode/Quartz2DShadings/listing9.html%3Fid%3DDTS10004363-1.0&media=dvd" target=_new>Yes</a>: Tell us what works for you.</div>
<div style="margin-bottom: 8px"><a href="http://developer.apple.com/feedback/?v=2&url=/samplecode/Quartz2DShadings/listing9.html%3Fid%3DDTS10004363-1.0&media=dvd" target=_new>It’s good, but:</a> Report typos, inaccuracies, and so forth.</div>
<div><a href="http://developer.apple.com/feedback/?v=3&url=/samplecode/Quartz2DShadings/listing9.html%3Fid%3DDTS10004363-1.0&media=dvd" target=_new>It wasn’t helpful</a>: Tell us what would have helped.</div>
</td>
</tr>
</table>
</td>
</tr>
</table>
<!-- START BOTTOM APPLE NAVIGATION -->
<!--#include virtual="/includes/footer"-->
<!-- END BOTTOM APPLE NAVIGATION -->
<!-- START CENTER CLOSE -->
</center>
<!-- END CENTER CLOSE -->
</body>
</html>