1 /* ADG - Automatic Drawing Generation
2 * Copyright (C) 2007,2008,2009,2010,2011,2012 Nicola Fontana <ntd at entidi.it>
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
23 * @short_description: A stroked entity
25 * The #AdgStroke object is a stroked representation of an #AdgTrail model.
33 * All fields are private and should not be used directly.
34 * Use its public methods instead.
40 #include "adg-internal.h"
41 #include "adg-dress.h"
42 #include "adg-dress-builtins.h"
43 #include "adg-style.h"
45 #include "adg-line-style.h"
46 #include "adg-model.h"
47 #include "adg-trail.h"
49 #include "adg-stroke.h"
50 #include "adg-stroke-private.h"
52 #define _ADG_OLD_OBJECT_CLASS ((GObjectClass *) adg_stroke_parent_class)
53 #define _ADG_OLD_ENTITY_CLASS ((AdgEntityClass *) adg_stroke_parent_class)
56 G_DEFINE_TYPE(AdgStroke
, adg_stroke
, ADG_TYPE_ENTITY
)
65 static void _adg_dispose (GObject
*object
);
66 static void _adg_get_property (GObject
*object
,
70 static void _adg_set_property (GObject
*object
,
74 static void _adg_global_changed (AdgEntity
*entity
);
75 static void _adg_local_changed (AdgEntity
*entity
);
76 static void _adg_arrange (AdgEntity
*entity
);
77 static void _adg_render (AdgEntity
*entity
,
79 static void _adg_unset_trail (AdgStroke
*stroke
);
83 adg_stroke_class_init(AdgStrokeClass
*klass
)
85 GObjectClass
*gobject_class
;
86 AdgEntityClass
*entity_class
;
89 gobject_class
= (GObjectClass
*) klass
;
90 entity_class
= (AdgEntityClass
*) klass
;
92 g_type_class_add_private(klass
, sizeof(AdgStrokePrivate
));
94 gobject_class
->dispose
= _adg_dispose
;
95 gobject_class
->get_property
= _adg_get_property
;
96 gobject_class
->set_property
= _adg_set_property
;
98 entity_class
->global_changed
= _adg_global_changed
;
99 entity_class
->local_changed
= _adg_local_changed
;
100 entity_class
->arrange
= _adg_arrange
;
101 entity_class
->render
= _adg_render
;
103 param
= adg_param_spec_dress("line-dress",
105 P_("The dress to use for stroking this entity"),
106 ADG_DRESS_LINE_STROKE
,
108 g_object_class_install_property(gobject_class
, PROP_LINE_DRESS
, param
);
110 param
= g_param_spec_object("trail",
112 P_("The trail to be stroked"),
114 G_PARAM_READWRITE
| G_PARAM_CONSTRUCT
);
115 g_object_class_install_property(gobject_class
, PROP_TRAIL
, param
);
119 adg_stroke_init(AdgStroke
*stroke
)
121 AdgStrokePrivate
*data
= G_TYPE_INSTANCE_GET_PRIVATE(stroke
,
125 data
->line_dress
= ADG_DRESS_LINE_STROKE
;
132 _adg_dispose(GObject
*object
)
134 AdgStroke
*stroke
= (AdgStroke
*) object
;
136 adg_stroke_set_trail(stroke
, NULL
);
138 if (_ADG_OLD_OBJECT_CLASS
->dispose
)
139 _ADG_OLD_OBJECT_CLASS
->dispose(object
);
143 _adg_get_property(GObject
*object
, guint prop_id
,
144 GValue
*value
, GParamSpec
*pspec
)
146 AdgStrokePrivate
*data
= ((AdgStroke
*) object
)->data
;
149 case PROP_LINE_DRESS
:
150 g_value_set_int(value
, data
->line_dress
);
153 g_value_set_object(value
, data
->trail
);
156 G_OBJECT_WARN_INVALID_PROPERTY_ID(object
, prop_id
, pspec
);
162 _adg_set_property(GObject
*object
, guint prop_id
,
163 const GValue
*value
, GParamSpec
*pspec
)
165 AdgStrokePrivate
*data
= ((AdgStroke
*) object
)->data
;
169 case PROP_LINE_DRESS
:
170 data
->line_dress
= g_value_get_int(value
);
173 old_trail
= data
->trail
;
174 data
->trail
= g_value_get_object(value
);
176 if (data
->trail
!= old_trail
) {
178 g_object_weak_ref((GObject
*) data
->trail
,
179 (GWeakNotify
) _adg_unset_trail
, object
);
180 adg_model_add_dependency((AdgModel
*) data
->trail
,
181 (AdgEntity
*) object
);
184 g_object_weak_unref((GObject
*) old_trail
,
185 (GWeakNotify
) _adg_unset_trail
, object
);
186 adg_model_remove_dependency((AdgModel
*) old_trail
,
187 (AdgEntity
*) object
);
192 G_OBJECT_WARN_INVALID_PROPERTY_ID(object
, prop_id
, pspec
);
200 * @trail: the #AdgTrail to stroke
202 * Creates a new stroke entity based on the @trail model.
203 * @trail can be %NULL, in which case an empty stroke is created.
205 * Returns: the newly created stroke entity
210 adg_stroke_new(AdgTrail
*trail
)
212 return g_object_new(ADG_TYPE_STROKE
, "trail", trail
, NULL
);
216 * adg_stroke_set_line_dress:
217 * @stroke: an #AdgStroke
218 * @dress: the new #AdgDress to use
220 * Sets a new line dress for rendering @stroke. The new dress
221 * must be related to the original dress for this property:
222 * you cannot set a dress used for line styles to a dress
225 * The check is done by calling adg_dress_are_related() with
226 * @dress and the previous dress as arguments. Check out its
227 * documentation for details on what is a related dress.
232 adg_stroke_set_line_dress(AdgStroke
*stroke
, AdgDress dress
)
234 g_return_if_fail(ADG_IS_STROKE(stroke
));
235 g_object_set(stroke
, "line-dress", dress
, NULL
);
239 * adg_stroke_get_line_dress:
240 * @stroke: an #AdgStroke
242 * Gets the line dress to be used in rendering @stroke.
244 * Returns: (transfer none): the current line dress.
249 adg_stroke_get_line_dress(AdgStroke
*stroke
)
251 AdgStrokePrivate
*data
;
253 g_return_val_if_fail(ADG_IS_STROKE(stroke
), ADG_DRESS_UNDEFINED
);
257 return data
->line_dress
;
261 * adg_stroke_set_trail:
262 * @stroke: an #AdgStroke
263 * @trail: the new #AdgTrail to bind
265 * Sets @trail as the new trail to be stroked by @stroke.
270 adg_stroke_set_trail(AdgStroke
*stroke
, AdgTrail
*trail
)
272 g_return_if_fail(ADG_IS_STROKE(stroke
));
273 g_object_set(stroke
, "trail", trail
, NULL
);
277 * adg_stroke_get_trail:
278 * @stroke: an #AdgStroke
280 * Gets the #AdgTrail bound to this @stroke entity.
281 * The returned trail is owned by @stroke and should not
282 * be freed or modified.
284 * Returns: (transfer none): the requested #AdgTrail or %NULL on errors.
289 adg_stroke_get_trail(AdgStroke
*stroke
)
291 AdgStrokePrivate
*data
;
293 g_return_val_if_fail(ADG_IS_STROKE(stroke
), NULL
);
302 _adg_global_changed(AdgEntity
*entity
)
304 if (_ADG_OLD_ENTITY_CLASS
->global_changed
)
305 _ADG_OLD_ENTITY_CLASS
->global_changed(entity
);
307 adg_entity_invalidate(entity
);
311 _adg_local_changed(AdgEntity
*entity
)
313 if (_ADG_OLD_ENTITY_CLASS
->local_changed
)
314 _ADG_OLD_ENTITY_CLASS
->local_changed(entity
);
316 adg_entity_invalidate(entity
);
320 _adg_arrange(AdgEntity
*entity
)
323 AdgStrokePrivate
*data
;
326 /* Check for cached result */
327 if (adg_entity_get_extents(entity
)->is_defined
)
330 stroke
= (AdgStroke
*) entity
;
333 cpml_extents_copy(&extents
, adg_trail_get_extents(data
->trail
));
334 cpml_extents_transform(&extents
, adg_entity_get_local_matrix(entity
));
335 cpml_extents_transform(&extents
, adg_entity_get_global_matrix(entity
));
337 adg_entity_set_extents(entity
, &extents
);
341 _adg_render(AdgEntity
*entity
, cairo_t
*cr
)
344 AdgStrokePrivate
*data
;
345 const cairo_path_t
*cairo_path
;
347 stroke
= (AdgStroke
*) entity
;
349 cairo_path
= adg_trail_get_cairo_path(data
->trail
);
351 if (cairo_path
!= NULL
) {
352 cairo_transform(cr
, adg_entity_get_global_matrix(entity
));
355 cairo_transform(cr
, adg_entity_get_local_matrix(entity
));
356 cairo_append_path(cr
, cairo_path
);
359 adg_entity_apply_dress(entity
, data
->line_dress
, cr
);
365 _adg_unset_trail(AdgStroke
*stroke
)
367 g_object_set(stroke
, "trail", NULL
, NULL
);