76 |
121 |
77 if (iface->send_event) { |
122 if (iface->send_event) { |
78 iface->send_event (navigation, structure); |
123 iface->send_event (navigation, structure); |
79 } |
124 } |
80 } |
125 } |
81 #ifdef __SYMBIAN32__ |
126 |
82 EXPORT_C |
127 /** |
83 #endif |
128 * gst_navigation_send_mouse_event: |
84 |
129 * @navigation: The navigation interface instance |
|
130 * @event: The type of the key event. Recognised values are "key-press" and |
|
131 * "key-release" |
|
132 * @key: Character representation of the key. This is typically as produced |
|
133 * by XKeysymToString. |
|
134 */ |
|
135 #ifdef __SYMBIAN32__ |
|
136 EXPORT_C |
|
137 #endif |
85 |
138 |
86 void |
139 void |
87 gst_navigation_send_key_event (GstNavigation * navigation, const char *event, |
140 gst_navigation_send_key_event (GstNavigation * navigation, const char *event, |
88 const char *key) |
141 const char *key) |
89 { |
142 { |
90 gst_navigation_send_event (navigation, |
143 gst_navigation_send_event (navigation, |
91 gst_structure_new ("application/x-gst-navigation", "event", G_TYPE_STRING, |
144 gst_structure_new (GST_NAVIGATION_EVENT_NAME, "event", G_TYPE_STRING, |
92 event, "key", G_TYPE_STRING, key, NULL)); |
145 event, "key", G_TYPE_STRING, key, NULL)); |
93 } |
146 } |
94 #ifdef __SYMBIAN32__ |
147 |
95 EXPORT_C |
148 /** |
96 #endif |
149 * gst_navigation_send_mouse_event: |
97 |
150 * @navigation: The navigation interface instance |
|
151 * @event: The type of mouse event, as a text string. Recognised values are |
|
152 * "mouse-button-press", "mouse-button-release" and "mouse-move". |
|
153 * @button: The button number of the button being pressed or released. Pass 0 |
|
154 * for mouse-move events. |
|
155 * @x: The x coordinate of the mouse event. |
|
156 * @y: The y coordinate of the mouse event. |
|
157 * |
|
158 * Sends a mouse event to the navigation interface. Mouse event coordinates |
|
159 * are sent relative to the display space of the related output area. This is |
|
160 * usually the size in pixels of the window associated with the element |
|
161 * implementing the #GstNavigation interface. |
|
162 * |
|
163 */ |
|
164 #ifdef __SYMBIAN32__ |
|
165 EXPORT_C |
|
166 #endif |
98 |
167 |
99 void |
168 void |
100 gst_navigation_send_mouse_event (GstNavigation * navigation, const char *event, |
169 gst_navigation_send_mouse_event (GstNavigation * navigation, const char *event, |
101 int button, double x, double y) |
170 int button, double x, double y) |
102 { |
171 { |
103 gst_navigation_send_event (navigation, |
172 gst_navigation_send_event (navigation, |
104 gst_structure_new ("application/x-gst-navigation", "event", G_TYPE_STRING, |
173 gst_structure_new (GST_NAVIGATION_EVENT_NAME, "event", G_TYPE_STRING, |
105 event, "button", G_TYPE_INT, button, "pointer_x", G_TYPE_DOUBLE, x, |
174 event, "button", G_TYPE_INT, button, "pointer_x", G_TYPE_DOUBLE, x, |
106 "pointer_y", G_TYPE_DOUBLE, y, NULL)); |
175 "pointer_y", G_TYPE_DOUBLE, y, NULL)); |
107 } |
176 } |
|
177 |
|
178 /** |
|
179 * gst_navigation_send_command: |
|
180 * @navigation: The navigation interface instance |
|
181 * @command: The command to issue |
|
182 * |
|
183 * Sends the indicated command to the navigation interface. |
|
184 * |
|
185 * Since: 0.10.23 |
|
186 */ |
|
187 #ifdef __SYMBIAN32__ |
|
188 EXPORT_C |
|
189 #endif |
|
190 |
|
191 void |
|
192 gst_navigation_send_command (GstNavigation * navigation, |
|
193 GstNavigationCommand command) |
|
194 { |
|
195 gst_navigation_send_event (navigation, |
|
196 gst_structure_new (GST_NAVIGATION_EVENT_NAME, "event", G_TYPE_STRING, |
|
197 "command", "command-code", G_TYPE_UINT, (guint) command, NULL)); |
|
198 } |
|
199 |
|
200 /* Navigation Queries */ |
|
201 |
|
202 #define GST_NAVIGATION_QUERY_HAS_TYPE(query,query_type) \ |
|
203 (gst_navigation_query_get_type (query) == GST_NAVIGATION_QUERY_ ## query_type) |
|
204 |
|
205 /** |
|
206 * gst_navigation_query_get_type: |
|
207 * @query: The query to inspect |
|
208 * |
|
209 * Inspect a #GstQuery and return the #GstNavigationQueryType associated with |
|
210 * it if it is a #GstNavigation query. |
|
211 * |
|
212 * Returns: The #GstNavigationQueryType of the query, or |
|
213 * #GST_NAVIGATION_QUERY_INVALID |
|
214 * Since: 0.10.23 |
|
215 */ |
|
216 #ifdef __SYMBIAN32__ |
|
217 EXPORT_C |
|
218 #endif |
|
219 |
|
220 GstNavigationQueryType |
|
221 gst_navigation_query_get_type (GstQuery * query) |
|
222 { |
|
223 const GstStructure *s; |
|
224 const gchar *q_type; |
|
225 |
|
226 if (query == NULL || GST_QUERY_TYPE (query) != GST_QUERY_CUSTOM) |
|
227 return GST_NAVIGATION_QUERY_INVALID; |
|
228 |
|
229 s = gst_query_get_structure (query); |
|
230 if (s == NULL || !gst_structure_has_name (s, GST_NAVIGATION_QUERY_NAME)) |
|
231 return GST_NAVIGATION_QUERY_INVALID; |
|
232 |
|
233 q_type = gst_structure_get_string (s, "type"); |
|
234 if (q_type == NULL) |
|
235 return GST_NAVIGATION_QUERY_INVALID; |
|
236 |
|
237 if (g_str_equal (q_type, "commands")) |
|
238 return GST_NAVIGATION_QUERY_COMMANDS; |
|
239 else if (g_str_equal (q_type, "angles")) |
|
240 return GST_NAVIGATION_QUERY_ANGLES; |
|
241 |
|
242 return GST_NAVIGATION_QUERY_INVALID; |
|
243 } |
|
244 |
|
245 /** |
|
246 * gst_navigation_query_new_commands: |
|
247 * |
|
248 * Create a new #GstNavigation commands query. When executed, it will |
|
249 * query the pipeline for the set of currently available commands. |
|
250 * |
|
251 * Returns: The new query. |
|
252 * Since: 0.10.23 |
|
253 */ |
|
254 #ifdef __SYMBIAN32__ |
|
255 EXPORT_C |
|
256 #endif |
|
257 |
|
258 GstQuery * |
|
259 gst_navigation_query_new_commands (void) |
|
260 { |
|
261 GstQuery *query; |
|
262 GstStructure *structure; |
|
263 |
|
264 structure = gst_structure_new (GST_NAVIGATION_QUERY_NAME, |
|
265 "type", G_TYPE_STRING, "commands", NULL); |
|
266 query = gst_query_new_application (GST_QUERY_CUSTOM, structure); |
|
267 |
|
268 return query; |
|
269 } |
|
270 |
|
271 static void |
|
272 gst_query_list_add_command (GValue * list, GstNavigationCommand val) |
|
273 { |
|
274 GValue item = { 0, }; |
|
275 |
|
276 g_value_init (&item, GST_TYPE_NAVIGATION_COMMAND); |
|
277 g_value_set_enum (&item, val); |
|
278 gst_value_list_append_value (list, &item); |
|
279 g_value_unset (&item); |
|
280 } |
|
281 |
|
282 /** |
|
283 * gst_navigation_query_set_commands: |
|
284 * @query: a #GstQuery |
|
285 * @n_cmds: the number of commands to set. |
|
286 * @...: A list of @GstNavigationCommand values, @n_cmds entries long. |
|
287 * |
|
288 * Set the #GstNavigation command query result fields in @query. The number |
|
289 * of commands passed must be equal to @n_commands. |
|
290 * |
|
291 * Since: 0.10.23 |
|
292 */ |
|
293 #ifdef __SYMBIAN32__ |
|
294 EXPORT_C |
|
295 #endif |
|
296 |
|
297 void |
|
298 gst_navigation_query_set_commands (GstQuery * query, gint n_cmds, ...) |
|
299 { |
|
300 va_list ap; |
|
301 GValue list = { 0, }; |
|
302 GstStructure *structure; |
|
303 gint i; |
|
304 |
|
305 g_return_if_fail (GST_NAVIGATION_QUERY_HAS_TYPE (query, COMMANDS)); |
|
306 |
|
307 g_value_init (&list, GST_TYPE_LIST); |
|
308 |
|
309 va_start (ap, n_cmds); |
|
310 for (i = 0; i < n_cmds; i++) { |
|
311 GstNavigationCommand val = va_arg (ap, GstNavigationCommand); |
|
312 gst_query_list_add_command (&list, val); |
|
313 } |
|
314 va_end (ap); |
|
315 |
|
316 structure = gst_query_get_structure (query); |
|
317 gst_structure_set_value (structure, "commands", &list); |
|
318 |
|
319 g_value_unset (&list); |
|
320 } |
|
321 |
|
322 /** |
|
323 * gst_navigation_query_set_commandsv: |
|
324 * @query: a #GstQuery |
|
325 * @n_cmds: the number of commands to set. |
|
326 * @cmds: An array containing @n_cmds @GstNavigationCommand values. |
|
327 * |
|
328 * Set the #GstNavigation command query result fields in @query. The number |
|
329 * of commands passed must be equal to @n_commands. |
|
330 * |
|
331 * Since: 0.10.23 |
|
332 */ |
|
333 #ifdef __SYMBIAN32__ |
|
334 EXPORT_C |
|
335 #endif |
|
336 |
|
337 void |
|
338 gst_navigation_query_set_commandsv (GstQuery * query, gint n_cmds, |
|
339 GstNavigationCommand * cmds) |
|
340 { |
|
341 GValue list = { 0, }; |
|
342 GstStructure *structure; |
|
343 gint i; |
|
344 |
|
345 g_return_if_fail (GST_NAVIGATION_QUERY_HAS_TYPE (query, COMMANDS)); |
|
346 |
|
347 g_value_init (&list, GST_TYPE_LIST); |
|
348 for (i = 0; i < n_cmds; i++) { |
|
349 gst_query_list_add_command (&list, cmds[i]); |
|
350 } |
|
351 structure = gst_query_get_structure (query); |
|
352 gst_structure_set_value (structure, "commands", &list); |
|
353 |
|
354 g_value_unset (&list); |
|
355 } |
|
356 |
|
357 /** |
|
358 * gst_navigation_query_parse_commands_length: |
|
359 * @query: a #GstQuery |
|
360 * @n_cmds: the number of commands in this query. |
|
361 * |
|
362 * Parse the number of commands in the #GstNavigation commands @query. |
|
363 * |
|
364 * Returns: %TRUE if the query could be successfully parsed. %FALSE if not. |
|
365 * Since: 0.10.23 |
|
366 */ |
|
367 #ifdef __SYMBIAN32__ |
|
368 EXPORT_C |
|
369 #endif |
|
370 |
|
371 gboolean |
|
372 gst_navigation_query_parse_commands_length (GstQuery * query, guint * n_cmds) |
|
373 { |
|
374 GstStructure *structure; |
|
375 const GValue *list; |
|
376 |
|
377 g_return_val_if_fail (GST_NAVIGATION_QUERY_HAS_TYPE (query, COMMANDS), FALSE); |
|
378 |
|
379 if (n_cmds == NULL) |
|
380 return TRUE; |
|
381 |
|
382 structure = gst_query_get_structure (query); |
|
383 list = gst_structure_get_value (structure, "commands"); |
|
384 if (list == NULL) |
|
385 *n_cmds = 0; |
|
386 else |
|
387 *n_cmds = gst_value_list_get_size (list); |
|
388 |
|
389 return TRUE; |
|
390 } |
|
391 |
|
392 /** |
|
393 * gst_navigation_query_parse_commands_nth: |
|
394 * @query: a #GstQuery |
|
395 * @nth: the nth command to retrieve. |
|
396 * @cmd: a pointer to store the nth command into. |
|
397 * |
|
398 * Parse the #GstNavigation command query and retrieve the @nth command from |
|
399 * it into @cmd. If the list contains less elements than @nth, @cmd will be |
|
400 * set to #GST_NAVIGATION_COMMAND_INVALID. |
|
401 * |
|
402 * Returns: %TRUE if the query could be successfully parsed. %FALSE if not. |
|
403 * Since: 0.10.23 |
|
404 */ |
|
405 #ifdef __SYMBIAN32__ |
|
406 EXPORT_C |
|
407 #endif |
|
408 |
|
409 gboolean |
|
410 gst_navigation_query_parse_commands_nth (GstQuery * query, guint nth, |
|
411 GstNavigationCommand * cmd) |
|
412 { |
|
413 GstStructure *structure; |
|
414 const GValue *list; |
|
415 |
|
416 g_return_val_if_fail (GST_NAVIGATION_QUERY_HAS_TYPE (query, COMMANDS), FALSE); |
|
417 |
|
418 if (cmd == NULL) |
|
419 return TRUE; |
|
420 |
|
421 structure = gst_query_get_structure (query); |
|
422 list = gst_structure_get_value (structure, "commands"); |
|
423 if (list == NULL) { |
|
424 *cmd = GST_NAVIGATION_COMMAND_INVALID; |
|
425 } else { |
|
426 if (nth < gst_value_list_get_size (list)) { |
|
427 *cmd = (GstNavigationCommand) |
|
428 g_value_get_enum (gst_value_list_get_value (list, nth)); |
|
429 } else |
|
430 *cmd = GST_NAVIGATION_COMMAND_INVALID; |
|
431 } |
|
432 |
|
433 return TRUE; |
|
434 } |
|
435 |
|
436 /** |
|
437 * gst_navigation_query_new_angles: |
|
438 * |
|
439 * Create a new #GstNavigation angles query. When executed, it will |
|
440 * query the pipeline for the set of currently available angles, which may be |
|
441 * greater than one in a multiangle video. |
|
442 * |
|
443 * Returns: The new query. |
|
444 * Since: 0.10.23 |
|
445 */ |
|
446 #ifdef __SYMBIAN32__ |
|
447 EXPORT_C |
|
448 #endif |
|
449 |
|
450 GstQuery * |
|
451 gst_navigation_query_new_angles (void) |
|
452 { |
|
453 GstQuery *query; |
|
454 GstStructure *structure; |
|
455 |
|
456 structure = gst_structure_new (GST_NAVIGATION_QUERY_NAME, |
|
457 "type", G_TYPE_STRING, "angles", NULL); |
|
458 query = gst_query_new_application (GST_QUERY_CUSTOM, structure); |
|
459 |
|
460 return query; |
|
461 } |
|
462 |
|
463 /** |
|
464 * gst_navigation_query_set_angles: |
|
465 * @query: a #GstQuery |
|
466 * @cur_angle: the current viewing angle to set. |
|
467 * @n_angles: the number of viewing angles to set. |
|
468 * |
|
469 * Set the #GstNavigation angles query result field in @query. |
|
470 * |
|
471 * Since: 0.10.23 |
|
472 */ |
|
473 #ifdef __SYMBIAN32__ |
|
474 EXPORT_C |
|
475 #endif |
|
476 |
|
477 void |
|
478 gst_navigation_query_set_angles (GstQuery * query, guint cur_angle, |
|
479 guint n_angles) |
|
480 { |
|
481 GstStructure *structure; |
|
482 |
|
483 g_return_if_fail (GST_NAVIGATION_QUERY_HAS_TYPE (query, ANGLES)); |
|
484 |
|
485 structure = gst_query_get_structure (query); |
|
486 gst_structure_set (structure, |
|
487 "angle", G_TYPE_UINT, cur_angle, "angles", G_TYPE_UINT, n_angles, NULL); |
|
488 } |
|
489 |
|
490 /** |
|
491 * gst_navigation_query_parse_angles: |
|
492 * @query: a #GstQuery |
|
493 * @cur_angle: Pointer to a #guint into which to store the currently selected |
|
494 * angle value from the query, or NULL |
|
495 * @n_angles: Pointer to a #guint into which to store the number of angles |
|
496 * value from the query, or NULL |
|
497 * |
|
498 * Parse the current angle number in the #GstNavigation angles @query into the |
|
499 * #guint pointed to by the @cur_angle variable, and the number of available |
|
500 * angles into the #guint pointed to by the @n_angles variable. |
|
501 * |
|
502 * Returns: %TRUE if the query could be successfully parsed. %FALSE if not. |
|
503 * Since: 0.10.23 |
|
504 */ |
|
505 #ifdef __SYMBIAN32__ |
|
506 EXPORT_C |
|
507 #endif |
|
508 |
|
509 gboolean |
|
510 gst_navigation_query_parse_angles (GstQuery * query, guint * cur_angle, |
|
511 guint * n_angles) |
|
512 { |
|
513 GstStructure *structure; |
|
514 |
|
515 g_return_val_if_fail (GST_NAVIGATION_QUERY_HAS_TYPE (query, ANGLES), FALSE); |
|
516 |
|
517 structure = gst_query_get_structure (query); |
|
518 |
|
519 if (cur_angle) |
|
520 g_return_val_if_fail (gst_structure_get_uint (structure, |
|
521 "angle", cur_angle), FALSE); |
|
522 |
|
523 if (n_angles) |
|
524 g_return_val_if_fail (gst_structure_get_uint (structure, |
|
525 "angles", n_angles), FALSE); |
|
526 |
|
527 return TRUE; |
|
528 } |
|
529 |
|
530 /* Navigation Messages */ |
|
531 |
|
532 #define GST_NAVIGATION_MESSAGE_HAS_TYPE(msg,msg_type) \ |
|
533 (gst_navigation_message_get_type (msg) == GST_NAVIGATION_MESSAGE_ ## msg_type) |
|
534 |
|
535 /** |
|
536 * gst_navigation_message_get_type: |
|
537 * @message: A #GstMessage to inspect. |
|
538 * |
|
539 * Check a bus message to see if it is a #GstNavigation event, and return |
|
540 * the #GstNavigationMessageType identifying the type of the message if so. |
|
541 * |
|
542 * Returns: The type of the #GstNavigationMessage, or |
|
543 * #GST_NAVIGATION_MESSAGE_INVALID if the message is not a #GstNavigation |
|
544 * notification. |
|
545 * |
|
546 * Since: 0.10.23 |
|
547 */ |
|
548 #ifdef __SYMBIAN32__ |
|
549 EXPORT_C |
|
550 #endif |
|
551 |
|
552 GstNavigationMessageType |
|
553 gst_navigation_message_get_type (GstMessage * message) |
|
554 { |
|
555 const GstStructure *s; |
|
556 const gchar *m_type; |
|
557 |
|
558 if (message == NULL || GST_MESSAGE_TYPE (message) != GST_MESSAGE_ELEMENT) |
|
559 return GST_NAVIGATION_MESSAGE_INVALID; |
|
560 |
|
561 s = gst_message_get_structure (message); |
|
562 if (s == NULL || !gst_structure_has_name (s, GST_NAVIGATION_MESSAGE_NAME)) |
|
563 return GST_NAVIGATION_MESSAGE_INVALID; |
|
564 |
|
565 m_type = gst_structure_get_string (s, "type"); |
|
566 if (m_type == NULL) |
|
567 return GST_NAVIGATION_MESSAGE_INVALID; |
|
568 |
|
569 if (g_str_equal (m_type, "mouse-over")) |
|
570 return GST_NAVIGATION_MESSAGE_MOUSE_OVER; |
|
571 else if (g_str_equal (m_type, "commands-changed")) |
|
572 return GST_NAVIGATION_MESSAGE_COMMANDS_CHANGED; |
|
573 else if (g_str_equal (m_type, "angles-changed")) |
|
574 return GST_NAVIGATION_MESSAGE_ANGLES_CHANGED; |
|
575 |
|
576 return GST_NAVIGATION_MESSAGE_INVALID; |
|
577 } |
|
578 |
|
579 /** |
|
580 * gst_navigation_message_new_mouse_over: |
|
581 * @src: A #GstObject to set as source of the new message. |
|
582 * @active: %TRUE if the mouse has entered a clickable area of the display. |
|
583 * %FALSE if it over a non-clickable area. |
|
584 * |
|
585 * Creates a new #GstNavigation message with type |
|
586 * #GST_NAVIGATION_MESSAGE_MOUSE_OVER. |
|
587 * |
|
588 * Returns: The new #GstMessage. |
|
589 * Since: 0.10.23 |
|
590 */ |
|
591 #ifdef __SYMBIAN32__ |
|
592 EXPORT_C |
|
593 #endif |
|
594 |
|
595 GstMessage * |
|
596 gst_navigation_message_new_mouse_over (GstObject * src, gboolean active) |
|
597 { |
|
598 GstStructure *s; |
|
599 GstMessage *m; |
|
600 |
|
601 s = gst_structure_new (GST_NAVIGATION_MESSAGE_NAME, |
|
602 "type", G_TYPE_STRING, "mouse-over", "active", G_TYPE_BOOLEAN, active, |
|
603 NULL); |
|
604 |
|
605 m = gst_message_new_custom (GST_MESSAGE_ELEMENT, src, s); |
|
606 |
|
607 return m; |
|
608 } |
|
609 |
|
610 /** |
|
611 * gst_navigation_message_parse_mouse_over: |
|
612 * @message: A #GstMessage to inspect. |
|
613 * @active: A pointer to a gboolean to receive the active/inactive state, |
|
614 * or NULL. |
|
615 * |
|
616 * Parse a #GstNavigation message of type #GST_NAVIGATION_MESSAGE_MOUSE_OVER |
|
617 * and extract the active/inactive flag. If the mouse over event is marked |
|
618 * active, it indicates that the mouse is over a clickable area. |
|
619 * |
|
620 * Returns: %TRUE if the message could be successfully parsed. %FALSE if not. |
|
621 * Since: 0.10.23 |
|
622 */ |
|
623 #ifdef __SYMBIAN32__ |
|
624 EXPORT_C |
|
625 #endif |
|
626 |
|
627 gboolean |
|
628 gst_navigation_message_parse_mouse_over (GstMessage * message, |
|
629 gboolean * active) |
|
630 { |
|
631 if (!GST_NAVIGATION_MESSAGE_HAS_TYPE (message, MOUSE_OVER)) |
|
632 return FALSE; |
|
633 |
|
634 if (active) { |
|
635 const GstStructure *s = gst_message_get_structure (message); |
|
636 if (gst_structure_get_boolean (s, "active", active) == FALSE) |
|
637 return FALSE; |
|
638 } |
|
639 |
|
640 return TRUE; |
|
641 } |
|
642 |
|
643 /** |
|
644 * gst_navigation_message_new_commands_changed: |
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645 * @src: A #GstObject to set as source of the new message. |
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646 * |
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647 * Creates a new #GstNavigation message with type |
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648 * #GST_NAVIGATION_MESSAGE_COMMANDS_CHANGED |
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649 * |
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650 * Returns: The new #GstMessage. |
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651 * Since: 0.10.23 |
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652 */ |
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653 #ifdef __SYMBIAN32__ |
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654 EXPORT_C |
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655 #endif |
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656 |
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657 GstMessage * |
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658 gst_navigation_message_new_commands_changed (GstObject * src) |
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659 { |
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660 GstStructure *s; |
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661 GstMessage *m; |
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662 |
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663 s = gst_structure_new (GST_NAVIGATION_MESSAGE_NAME, |
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664 "type", G_TYPE_STRING, "commands-changed", NULL); |
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665 |
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666 m = gst_message_new_custom (GST_MESSAGE_ELEMENT, src, s); |
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667 |
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668 return m; |
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669 } |
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670 |
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671 /** |
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672 * gst_navigation_message_new_angles_changed: |
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673 * @src: A #GstObject to set as source of the new message. |
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674 * @cur_angle: The currently selected angle. |
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675 * @n_angles: The number of viewing angles now available. |
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676 * |
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677 * Creates a new #GstNavigation message with type |
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678 * #GST_NAVIGATION_MESSAGE_ANGLES_CHANGED for notifying an application |
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679 * that the current angle, or current number of angles available in a |
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680 * multiangle video has changed. |
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681 * |
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682 * Returns: The new #GstMessage. |
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683 * Since: 0.10.23 |
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684 */ |
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685 #ifdef __SYMBIAN32__ |
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686 EXPORT_C |
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687 #endif |
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688 |
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689 GstMessage * |
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690 gst_navigation_message_new_angles_changed (GstObject * src, guint cur_angle, |
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691 guint n_angles) |
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692 { |
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693 GstStructure *s; |
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694 GstMessage *m; |
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695 |
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696 s = gst_structure_new (GST_NAVIGATION_MESSAGE_NAME, |
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697 "type", G_TYPE_STRING, "angles-changed", |
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698 "angle", G_TYPE_UINT, cur_angle, "angles", G_TYPE_UINT, n_angles, NULL); |
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699 |
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700 m = gst_message_new_custom (GST_MESSAGE_ELEMENT, src, s); |
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701 |
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702 return m; |
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703 } |
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704 |
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705 /** |
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706 * gst_navigation_message_parse_angles_changed: |
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707 * @message: A #GstMessage to inspect. |
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708 * @cur_angle: A pointer to a #guint to receive the new current angle number, |
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709 * or NULL |
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710 * @n_angles: A pointer to a #guint to receive the new angle count, or NULL. |
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711 * |
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712 * Parse a #GstNavigation message of type GST_NAVIGATION_MESSAGE_ANGLES_CHANGED |
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713 * and extract the @cur_angle and @n_angles parameters. |
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714 * |
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715 * Returns: %TRUE if the message could be successfully parsed. %FALSE if not. |
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716 * Since: 0.10.23 |
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717 */ |
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718 #ifdef __SYMBIAN32__ |
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719 EXPORT_C |
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720 #endif |
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721 |
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722 gboolean |
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723 gst_navigation_message_parse_angles_changed (GstMessage * message, |
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724 guint * cur_angle, guint * n_angles) |
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725 { |
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726 const GstStructure *s; |
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727 |
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728 g_return_val_if_fail (GST_NAVIGATION_MESSAGE_HAS_TYPE (message, |
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729 ANGLES_CHANGED), FALSE); |
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730 |
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731 s = gst_message_get_structure (message); |
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732 if (cur_angle) |
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733 g_return_val_if_fail (gst_structure_get_uint (s, "angle", cur_angle), |
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734 FALSE); |
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735 |
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736 if (n_angles) |
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737 g_return_val_if_fail (gst_structure_get_uint (s, "angles", n_angles), |
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738 FALSE); |
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739 |
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740 return TRUE; |
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741 } |
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742 |
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743 #define GST_NAVIGATION_EVENT_HAS_TYPE(event,event_type) \ |
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744 (gst_navigation_event_get_type (event) == GST_NAVIGATION_EVENT_ ## event_type) |
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745 |
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746 /** |
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747 * gst_navigation_event_get_type: |
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748 * @event: A #GstEvent to inspect. |
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749 * |
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750 * Inspect a #GstEvent and return the #GstNavigationEventType of the event, or |
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751 * #GST_NAVIGATION_EVENT_INVALID if the event is not a #GstNavigation event. |
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752 * |
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753 * Since: 0.10.23 |
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754 */ |
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755 #ifdef __SYMBIAN32__ |
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756 EXPORT_C |
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757 #endif |
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758 |
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759 GstNavigationEventType |
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760 gst_navigation_event_get_type (GstEvent * event) |
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761 { |
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762 const GstStructure *s; |
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763 const gchar *e_type; |
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764 |
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765 if (event == NULL || GST_EVENT_TYPE (event) != GST_EVENT_NAVIGATION) |
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766 return GST_NAVIGATION_EVENT_INVALID; |
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767 |
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768 s = gst_event_get_structure (event); |
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769 if (s == NULL || !gst_structure_has_name (s, GST_NAVIGATION_EVENT_NAME)) |
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770 return GST_NAVIGATION_EVENT_INVALID; |
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771 |
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772 e_type = gst_structure_get_string (s, "event"); |
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773 if (e_type == NULL) |
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774 return GST_NAVIGATION_EVENT_INVALID; |
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775 |
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776 if (g_str_equal (e_type, "mouse-button-press")) |
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777 return GST_NAVIGATION_EVENT_MOUSE_BUTTON_PRESS; |
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778 else if (g_str_equal (e_type, "mouse-button-release")) |
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779 return GST_NAVIGATION_EVENT_MOUSE_BUTTON_RELEASE; |
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780 else if (g_str_equal (e_type, "mouse-move")) |
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781 return GST_NAVIGATION_EVENT_MOUSE_MOVE; |
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782 else if (g_str_equal (e_type, "key-press")) |
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783 return GST_NAVIGATION_EVENT_KEY_PRESS; |
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784 else if (g_str_equal (e_type, "key-release")) |
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785 return GST_NAVIGATION_EVENT_KEY_RELEASE; |
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786 else if (g_str_equal (e_type, "command")) |
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787 return GST_NAVIGATION_EVENT_COMMAND; |
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788 |
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789 return GST_NAVIGATION_EVENT_INVALID; |
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790 } |
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791 |
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792 /** |
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793 * gst_navigation_event_parse_key_event: |
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794 * @event: A #GstEvent to inspect. |
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795 * @key: A pointer to a location to receive the string identifying the key |
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796 * press. The returned string is owned by the event, and valid only until the |
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797 * event is unreffed. |
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798 * |
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799 * Since: 0.10.23 |
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800 */ |
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801 #ifdef __SYMBIAN32__ |
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802 EXPORT_C |
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803 #endif |
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804 |
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805 gboolean |
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806 gst_navigation_event_parse_key_event (GstEvent * event, const gchar ** key) |
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807 { |
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808 GstNavigationEventType e_type; |
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809 const GstStructure *s; |
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810 |
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811 e_type = gst_navigation_event_get_type (event); |
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812 g_return_val_if_fail (e_type == GST_NAVIGATION_EVENT_KEY_PRESS || |
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813 e_type == GST_NAVIGATION_EVENT_KEY_RELEASE, FALSE); |
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814 |
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815 if (key) { |
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816 s = gst_event_get_structure (event); |
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817 *key = gst_structure_get_string (s, "key"); |
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818 if (*key == NULL) |
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819 return FALSE; |
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820 } |
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821 |
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822 return TRUE; |
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823 } |
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824 |
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825 /** |
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826 * gst_navigation_event_parse_mouse_button_event: |
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827 * @event: A #GstEvent to inspect. |
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828 * @button: Pointer to a gint that will receive the button number associated |
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829 * with the event. |
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830 * @x: Pointer to a gdouble to receive the x coordinate of the mouse button |
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831 * event. |
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832 * @y: Pointer to a gdouble to receive the y coordinate of the mouse button |
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833 * event. |
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834 * |
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835 * Retrieve the details of either a #GstNavigation mouse button press event or |
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836 * a mouse button release event. Determine which type the event is using |
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837 * gst_navigation_event_get_type() to retrieve the #GstNavigationEventType. |
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838 * |
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839 * Since: 0.10.23 |
|
840 */ |
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841 #ifdef __SYMBIAN32__ |
|
842 EXPORT_C |
|
843 #endif |
|
844 |
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845 gboolean |
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846 gst_navigation_event_parse_mouse_button_event (GstEvent * event, gint * button, |
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847 gdouble * x, gdouble * y) |
|
848 { |
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849 GstNavigationEventType e_type; |
|
850 const GstStructure *s; |
|
851 |
|
852 e_type = gst_navigation_event_get_type (event); |
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853 g_return_val_if_fail (e_type == GST_NAVIGATION_EVENT_MOUSE_BUTTON_PRESS || |
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854 e_type == GST_NAVIGATION_EVENT_MOUSE_BUTTON_RELEASE, FALSE); |
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855 |
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856 s = gst_event_get_structure (event); |
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857 if (x) |
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858 g_return_val_if_fail (gst_structure_get_double (s, "pointer_x", x), FALSE); |
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859 if (y) |
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860 g_return_val_if_fail (gst_structure_get_double (s, "pointer_y", y), FALSE); |
|
861 if (button) |
|
862 g_return_val_if_fail (gst_structure_get_int (s, "button", button), FALSE); |
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863 |
|
864 return TRUE; |
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865 } |
|
866 |
|
867 /** |
|
868 * gst_navigation_event_parse_mouse_move_event: |
|
869 * @event: A #GstEvent to inspect. |
|
870 * @x: Pointer to a gdouble to receive the x coordinate of the mouse movement. |
|
871 * @y: Pointer to a gdouble to receive the y coordinate of the mouse movement. |
|
872 * |
|
873 * Inspect a #GstNavigation mouse movement event and extract the coordinates |
|
874 * of the event. |
|
875 * |
|
876 * Since: 0.10.23 |
|
877 */ |
|
878 #ifdef __SYMBIAN32__ |
|
879 EXPORT_C |
|
880 #endif |
|
881 |
|
882 gboolean |
|
883 gst_navigation_event_parse_mouse_move_event (GstEvent * event, gdouble * x, |
|
884 gdouble * y) |
|
885 { |
|
886 const GstStructure *s; |
|
887 |
|
888 g_return_val_if_fail (GST_NAVIGATION_EVENT_HAS_TYPE (event, MOUSE_MOVE), |
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889 FALSE); |
|
890 |
|
891 s = gst_event_get_structure (event); |
|
892 if (x) |
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893 g_return_val_if_fail (gst_structure_get_double (s, "pointer_x", x), FALSE); |
|
894 if (y) |
|
895 g_return_val_if_fail (gst_structure_get_double (s, "pointer_y", y), FALSE); |
|
896 |
|
897 return TRUE; |
|
898 } |
|
899 |
|
900 /** |
|
901 * gst_navigation_event_parse_command: |
|
902 * @event: A #GstEvent to inspect. |
|
903 * @command: Pointer to GstNavigationCommand to receive the type of the |
|
904 * navigation event. |
|
905 * |
|
906 * Inspect a #GstNavigation command event and retrieve the enum value of the |
|
907 * associated command. |
|
908 * |
|
909 * Since: 0.10.23 |
|
910 */ |
|
911 #ifdef __SYMBIAN32__ |
|
912 EXPORT_C |
|
913 #endif |
|
914 |
|
915 gboolean |
|
916 gst_navigation_event_parse_command (GstEvent * event, |
|
917 GstNavigationCommand * command) |
|
918 { |
|
919 const GstStructure *s; |
|
920 g_return_val_if_fail (GST_NAVIGATION_EVENT_HAS_TYPE (event, COMMAND), FALSE); |
|
921 |
|
922 if (command) { |
|
923 s = gst_event_get_structure (event); |
|
924 g_return_val_if_fail (gst_structure_get_uint (s, "command-code", (guint*)command), |
|
925 FALSE); |
|
926 } |
|
927 |
|
928 return TRUE; |
|
929 } |