This file is indexed.

/usr/share/gtk-doc/html/clutter/ClutterZoomAction.html is in libclutter-1.0-doc 1.24.2-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  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
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>ClutterZoomAction: Clutter Reference Manual</title>
<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
<link rel="home" href="index.html" title="Clutter Reference Manual">
<link rel="up" href="ch04.html" title="Actions">
<link rel="prev" href="ClutterRotateAction.html" title="ClutterRotateAction">
<link rel="next" href="ClutterTapAction.html" title="ClutterTapAction">
<meta name="generator" content="GTK-Doc V1.24 (XML mode)">
<link rel="stylesheet" href="style.css" type="text/css">
</head>
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
<table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="5"><tr valign="middle">
<td width="100%" align="left" class="shortcuts">
<a href="#" class="shortcut">Top</a><span id="nav_description">  <span class="dim">|</span> 
                  <a href="#ClutterZoomAction.description" class="shortcut">Description</a></span><span id="nav_hierarchy">  <span class="dim">|</span> 
                  <a href="#ClutterZoomAction.object-hierarchy" class="shortcut">Object Hierarchy</a></span><span id="nav_properties">  <span class="dim">|</span> 
                  <a href="#ClutterZoomAction.properties" class="shortcut">Properties</a></span><span id="nav_signals">  <span class="dim">|</span> 
                  <a href="#ClutterZoomAction.signals" class="shortcut">Signals</a></span>
</td>
<td><a accesskey="h" href="index.html"><img src="home.png" width="16" height="16" border="0" alt="Home"></a></td>
<td><a accesskey="u" href="ch04.html"><img src="up.png" width="16" height="16" border="0" alt="Up"></a></td>
<td><a accesskey="p" href="ClutterRotateAction.html"><img src="left.png" width="16" height="16" border="0" alt="Prev"></a></td>
<td><a accesskey="n" href="ClutterTapAction.html"><img src="right.png" width="16" height="16" border="0" alt="Next"></a></td>
</tr></table>
<div class="refentry">
<a name="ClutterZoomAction"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="ClutterZoomAction.top_of_page"></a>ClutterZoomAction</span></h2>
<p>ClutterZoomAction — Action enabling zooming on actors</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="ClutterZoomAction.functions"></a><h2>Functions</h2>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="functions_return">
<col class="functions_name">
</colgroup>
<tbody>
<tr>
<td class="function_type">
<a class="link" href="ClutterAction.html" title="ClutterAction"><span class="returnvalue">ClutterAction</span></a> *
</td>
<td class="function_name">
<a class="link" href="ClutterZoomAction.html#clutter-zoom-action-new" title="clutter_zoom_action_new ()">clutter_zoom_action_new</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="ClutterZoomAction.html#clutter-zoom-action-set-zoom-axis" title="clutter_zoom_action_set_zoom_axis ()">clutter_zoom_action_set_zoom_axis</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a class="link" href="ClutterZoomAction.html#ClutterZoomAxis" title="enum ClutterZoomAxis"><span class="returnvalue">ClutterZoomAxis</span></a>
</td>
<td class="function_name">
<a class="link" href="ClutterZoomAction.html#clutter-zoom-action-get-zoom-axis" title="clutter_zoom_action_get_zoom_axis ()">clutter_zoom_action_get_zoom_axis</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="ClutterZoomAction.html#clutter-zoom-action-get-focal-point" title="clutter_zoom_action_get_focal_point ()">clutter_zoom_action_get_focal_point</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="ClutterZoomAction.html#clutter-zoom-action-get-transformed-focal-point" title="clutter_zoom_action_get_transformed_focal_point ()">clutter_zoom_action_get_transformed_focal_point</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="ClutterZoomAction.properties"></a><h2>Properties</h2>
<div class="informaltable"><table border="0">
<colgroup>
<col width="150px" class="properties_type">
<col width="300px" class="properties_name">
<col width="200px" class="properties_flags">
</colgroup>
<tbody><tr>
<td class="property_type"><a class="link" href="ClutterZoomAction.html#ClutterZoomAxis" title="enum ClutterZoomAxis"><span class="type">ClutterZoomAxis</span></a></td>
<td class="property_name"><a class="link" href="ClutterZoomAction.html#ClutterZoomAction--zoom-axis" title="The “zoom-axis” property">zoom-axis</a></td>
<td class="property_flags">Read / Write</td>
</tr></tbody>
</table></div>
</div>
<div class="refsect1">
<a name="ClutterZoomAction.signals"></a><h2>Signals</h2>
<div class="informaltable"><table border="0">
<colgroup>
<col width="150px" class="signals_return">
<col width="300px" class="signals_name">
<col width="200px" class="signals_flags">
</colgroup>
<tbody><tr>
<td class="signal_type"><span class="returnvalue">gboolean</span></td>
<td class="signal_name"><a class="link" href="ClutterZoomAction.html#ClutterZoomAction-zoom" title="The “zoom” signal">zoom</a></td>
<td class="signal_flags">Run Last</td>
</tr></tbody>
</table></div>
</div>
<div class="refsect1">
<a name="ClutterZoomAction.other"></a><h2>Types and Values</h2>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="name">
<col class="description">
</colgroup>
<tbody>
<tr>
<td class="datatype_keyword">struct</td>
<td class="function_name"><a class="link" href="ClutterZoomAction.html#ClutterZoomAction-struct" title="struct ClutterZoomAction">ClutterZoomAction</a></td>
</tr>
<tr>
<td class="datatype_keyword">struct</td>
<td class="function_name"><a class="link" href="ClutterZoomAction.html#ClutterZoomActionClass" title="struct ClutterZoomActionClass">ClutterZoomActionClass</a></td>
</tr>
<tr>
<td class="datatype_keyword">enum</td>
<td class="function_name"><a class="link" href="ClutterZoomAction.html#ClutterZoomAxis" title="enum ClutterZoomAxis">ClutterZoomAxis</a></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="ClutterZoomAction.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="screen">    GObject
    <span class="lineart">╰──</span> GInitiallyUnowned
        <span class="lineart">╰──</span> <a class="link" href="ClutterActorMeta.html" title="ClutterActorMeta">ClutterActorMeta</a>
            <span class="lineart">╰──</span> <a class="link" href="ClutterAction.html" title="ClutterAction">ClutterAction</a>
                <span class="lineart">╰──</span> <a class="link" href="ClutterGestureAction.html" title="ClutterGestureAction">ClutterGestureAction</a>
                    <span class="lineart">╰──</span> ClutterZoomAction
</pre>
</div>
<div class="refsect1">
<a name="ClutterZoomAction.description"></a><h2>Description</h2>
<p><a class="link" href="ClutterZoomAction.html" title="ClutterZoomAction"><span class="type">ClutterZoomAction</span></a> is a sub-class of <a class="link" href="ClutterGestureAction.html" title="ClutterGestureAction"><span class="type">ClutterGestureAction</span></a> that
implements all the necessary logic for zooming actors using a "pinch"
gesture between two touch points.</p>
<p>The simplest usage of <a class="link" href="ClutterZoomAction.html" title="ClutterZoomAction"><span class="type">ClutterZoomAction</span></a> consists in adding it to
a <a class="link" href="ClutterActor.html" title="ClutterActor"><span class="type">ClutterActor</span></a> and setting it as reactive; for instance, the following
code:</p>
<div class="informalexample"><pre class="programlisting">
  clutter_actor_add_action (actor, clutter_zoom_action_new ());
  clutter_actor_set_reactive (actor, TRUE);
</pre></div>
<p></p>
<p>will automatically result in the actor to be scale according to the
distance between two touch points.</p>
</div>
<div class="refsect1">
<a name="ClutterZoomAction.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="clutter-zoom-action-new"></a><h3>clutter_zoom_action_new ()</h3>
<pre class="programlisting"><a class="link" href="ClutterAction.html" title="ClutterAction"><span class="returnvalue">ClutterAction</span></a> *
clutter_zoom_action_new (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>Creates a new <a class="link" href="ClutterZoomAction.html" title="ClutterZoomAction"><span class="type">ClutterZoomAction</span></a> instance</p>
<div class="refsect3">
<a name="id-1.5.5.9.9.2.5"></a><h4>Returns</h4>
<p> the newly created <a class="link" href="ClutterZoomAction.html" title="ClutterZoomAction"><span class="type">ClutterZoomAction</span></a></p>
</div>
<p class="since">Since: <a class="link" href="ix13.html#api-index-1.12">1.12</a></p>
</div>
<hr>
<div class="refsect2">
<a name="clutter-zoom-action-set-zoom-axis"></a><h3>clutter_zoom_action_set_zoom_axis ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
clutter_zoom_action_set_zoom_axis (<em class="parameter"><code><a class="link" href="ClutterZoomAction.html" title="ClutterZoomAction"><span class="type">ClutterZoomAction</span></a> *action</code></em>,
                                   <em class="parameter"><code><a class="link" href="ClutterZoomAction.html#ClutterZoomAxis" title="enum ClutterZoomAxis"><span class="type">ClutterZoomAxis</span></a> axis</code></em>);</pre>
<p>Restricts the zooming action to a specific axis</p>
<div class="refsect3">
<a name="id-1.5.5.9.9.3.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>action</p></td>
<td class="parameter_description"><p>a <a class="link" href="ClutterZoomAction.html" title="ClutterZoomAction"><span class="type">ClutterZoomAction</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>axis</p></td>
<td class="parameter_description"><p>the axis to constraint the zooming to</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="ix13.html#api-index-1.12">1.12</a></p>
</div>
<hr>
<div class="refsect2">
<a name="clutter-zoom-action-get-zoom-axis"></a><h3>clutter_zoom_action_get_zoom_axis ()</h3>
<pre class="programlisting"><a class="link" href="ClutterZoomAction.html#ClutterZoomAxis" title="enum ClutterZoomAxis"><span class="returnvalue">ClutterZoomAxis</span></a>
clutter_zoom_action_get_zoom_axis (<em class="parameter"><code><a class="link" href="ClutterZoomAction.html" title="ClutterZoomAction"><span class="type">ClutterZoomAction</span></a> *action</code></em>);</pre>
<p>Retrieves the axis constraint set by <a class="link" href="ClutterZoomAction.html#clutter-zoom-action-set-zoom-axis" title="clutter_zoom_action_set_zoom_axis ()"><code class="function">clutter_zoom_action_set_zoom_axis()</code></a></p>
<div class="refsect3">
<a name="id-1.5.5.9.9.4.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody><tr>
<td class="parameter_name"><p>action</p></td>
<td class="parameter_description"><p>a <a class="link" href="ClutterZoomAction.html" title="ClutterZoomAction"><span class="type">ClutterZoomAction</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.5.5.9.9.4.6"></a><h4>Returns</h4>
<p> the axis constraint</p>
</div>
<p class="since">Since: <a class="link" href="ix13.html#api-index-1.12">1.12</a></p>
</div>
<hr>
<div class="refsect2">
<a name="clutter-zoom-action-get-focal-point"></a><h3>clutter_zoom_action_get_focal_point ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
clutter_zoom_action_get_focal_point (<em class="parameter"><code><a class="link" href="ClutterZoomAction.html" title="ClutterZoomAction"><span class="type">ClutterZoomAction</span></a> *action</code></em>,
                                     <em class="parameter"><code><a class="link" href="clutter-Base-geometric-types.html#ClutterPoint"><span class="type">ClutterPoint</span></a> *point</code></em>);</pre>
<p>Retrieves the focal point of the current zoom</p>
<div class="refsect3">
<a name="id-1.5.5.9.9.5.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>action</p></td>
<td class="parameter_description"><p>a <a class="link" href="ClutterZoomAction.html" title="ClutterZoomAction"><span class="type">ClutterZoomAction</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>point</p></td>
<td class="parameter_description"><p> a <a class="link" href="clutter-Base-geometric-types.html#ClutterPoint"><span class="type">ClutterPoint</span></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="ix13.html#api-index-1.12">1.12</a></p>
</div>
<hr>
<div class="refsect2">
<a name="clutter-zoom-action-get-transformed-focal-point"></a><h3>clutter_zoom_action_get_transformed_focal_point ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
clutter_zoom_action_get_transformed_focal_point
                               (<em class="parameter"><code><a class="link" href="ClutterZoomAction.html" title="ClutterZoomAction"><span class="type">ClutterZoomAction</span></a> *action</code></em>,
                                <em class="parameter"><code><a class="link" href="clutter-Base-geometric-types.html#ClutterPoint"><span class="type">ClutterPoint</span></a> *point</code></em>);</pre>
<p>Retrieves the focal point relative to the actor's coordinates of
the current zoom</p>
<div class="refsect3">
<a name="id-1.5.5.9.9.6.5"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>action</p></td>
<td class="parameter_description"><p>a <a class="link" href="ClutterZoomAction.html" title="ClutterZoomAction"><span class="type">ClutterZoomAction</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>point</p></td>
<td class="parameter_description"><p> a <a class="link" href="clutter-Base-geometric-types.html#ClutterPoint"><span class="type">ClutterPoint</span></a>. </p></td>
<td class="parameter_annotations"><span class="annotation">[<acronym title="Parameter for returning results. Default is transfer full."><span class="acronym">out</span></acronym>]</span></td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="ix13.html#api-index-1.12">1.12</a></p>
</div>
</div>
<div class="refsect1">
<a name="ClutterZoomAction.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="ClutterZoomAction-struct"></a><h3>struct ClutterZoomAction</h3>
<pre class="programlisting">struct ClutterZoomAction;</pre>
<p>The <a class="link" href="ClutterZoomAction.html" title="ClutterZoomAction"><span class="type">ClutterZoomAction</span></a> structure contains only
private data and should be accessed using the provided API</p>
<p class="since">Since: <a class="link" href="ix13.html#api-index-1.12">1.12</a></p>
</div>
<hr>
<div class="refsect2">
<a name="ClutterZoomActionClass"></a><h3>struct ClutterZoomActionClass</h3>
<pre class="programlisting">struct ClutterZoomActionClass {
  gboolean (* zoom)  (ClutterZoomAction *action,
                      ClutterActor      *actor,
                      ClutterPoint      *focal_point,
                      gdouble            factor);
};
</pre>
<p>The <a class="link" href="ClutterZoomAction.html#ClutterZoomActionClass" title="struct ClutterZoomActionClass"><span class="type">ClutterZoomActionClass</span></a> structure contains
only private data</p>
<div class="refsect3">
<a name="id-1.5.5.9.10.3.5"></a><h4>Members</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="300px" class="struct_members_name">
<col class="struct_members_description">
<col width="200px" class="struct_members_annotations">
</colgroup>
<tbody><tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="ClutterZoomActionClass.zoom"></a>zoom</code></em> ()</p></td>
<td class="struct_member_description"><p>class handler of the <a class="link" href="ClutterZoomAction.html#ClutterZoomAction-zoom" title="The “zoom” signal"><span class="type">“zoom”</span></a> signal</p></td>
<td class="struct_member_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="ix13.html#api-index-1.12">1.12</a></p>
</div>
<hr>
<div class="refsect2">
<a name="ClutterZoomAxis"></a><h3>enum ClutterZoomAxis</h3>
<p>The axis of the constraint that should be applied by the
zooming action.</p>
<div class="refsect3">
<a name="id-1.5.5.9.10.4.4"></a><h4>Members</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="300px" class="enum_members_name">
<col class="enum_members_description">
<col width="200px" class="enum_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="enum_member_name"><p><a name="CLUTTER-ZOOM-X-AXIS:CAPS"></a>CLUTTER_ZOOM_X_AXIS</p></td>
<td class="enum_member_description">
<p>Scale only on the X axis</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="CLUTTER-ZOOM-Y-AXIS:CAPS"></a>CLUTTER_ZOOM_Y_AXIS</p></td>
<td class="enum_member_description">
<p>Scale only on the Y axis</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
<tr>
<td class="enum_member_name"><p><a name="CLUTTER-ZOOM-BOTH:CAPS"></a>CLUTTER_ZOOM_BOTH</p></td>
<td class="enum_member_description">
<p>Scale on both axis</p>
</td>
<td class="enum_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<p class="since">Since: <a class="link" href="ix13.html#api-index-1.12">1.12</a></p>
</div>
</div>
<div class="refsect1">
<a name="ClutterZoomAction.property-details"></a><h2>Property Details</h2>
<div class="refsect2">
<a name="ClutterZoomAction--zoom-axis"></a><h3>The <code class="literal">“zoom-axis”</code> property</h3>
<pre class="programlisting">  “zoom-axis”                <a class="link" href="ClutterZoomAction.html#ClutterZoomAxis" title="enum ClutterZoomAxis"><span class="type">ClutterZoomAxis</span></a></pre>
<p>Constraints the zooming action to the specified axis</p>
<p>Flags: Read / Write</p>
<p>Default value: CLUTTER_ZOOM_BOTH</p>
<p class="since">Since: <a class="link" href="ix13.html#api-index-1.12">1.12</a></p>
</div>
</div>
<div class="refsect1">
<a name="ClutterZoomAction.signal-details"></a><h2>Signal Details</h2>
<div class="refsect2">
<a name="ClutterZoomAction-zoom"></a><h3>The <code class="literal">“zoom”</code> signal</h3>
<pre class="programlisting"><span class="returnvalue">gboolean</span>
user_function (<a class="link" href="ClutterZoomAction.html" title="ClutterZoomAction"><span class="type">ClutterZoomAction</span></a> *action,
               <a class="link" href="ClutterActor.html" title="ClutterActor"><span class="type">ClutterActor</span></a>      *actor,
               <a class="link" href="clutter-Base-geometric-types.html#ClutterPoint"><span class="type">ClutterPoint</span></a>      *focal_point,
               <span class="type">gdouble</span>            factor,
               <span class="type">gpointer</span>           user_data)</pre>
<p>The ::zoom signal is emitted for each series of touch events that
change the distance and focal point between the touch points.</p>
<p>The default handler of the signal will call
<a class="link" href="ClutterActor.html#clutter-actor-set-scale" title="clutter_actor_set_scale ()"><code class="function">clutter_actor_set_scale()</code></a> on <em class="parameter"><code>actor</code></em>
 using the ratio of the first
distance between the touch points and the current distance. To
override the default behaviour, connect to this signal and return
<code class="literal">FALSE</code>.</p>
<div class="refsect3">
<a name="id-1.5.5.9.12.2.6"></a><h4>Parameters</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>action</p></td>
<td class="parameter_description"><p>the <a class="link" href="ClutterZoomAction.html" title="ClutterZoomAction"><span class="type">ClutterZoomAction</span></a> that emitted the signal</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>actor</p></td>
<td class="parameter_description"><p>the <a class="link" href="ClutterActor.html" title="ClutterActor"><span class="type">ClutterActor</span></a> attached to the action</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>focal_point</p></td>
<td class="parameter_description"><p>the focal point of the zoom</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>factor</p></td>
<td class="parameter_description"><p>the initial distance between the 2 touch points</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>user_data</p></td>
<td class="parameter_description"><p>user data set when the signal handler was connected.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.5.5.9.12.2.7"></a><h4>Returns</h4>
<p> <code class="literal">TRUE</code> if the zoom should continue, and <code class="literal">FALSE</code> if
the zoom should be cancelled.</p>
</div>
<p>Flags: Run Last</p>
<p class="since">Since: <a class="link" href="ix13.html#api-index-1.12">1.12</a></p>
</div>
</div>
</div>
<div class="footer">
<hr>Generated by GTK-Doc V1.24</div>
</body>
</html>