1 /* ADG - Automatic Drawing Generation
2 * Copyright (C) 2007,2008,2009 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: Linear dimensions
25 * The #AdgRDim entity represents a linear dimension.
31 * All fields are private and should not be used directly.
32 * Use its public methods instead.
37 #include "adg-rdim-private.h"
38 #include "adg-dim-private.h"
39 #include "adg-dim-style.h"
42 #define PARENT_OBJECT_CLASS ((GObjectClass *) adg_rdim_parent_class)
43 #define PARENT_ENTITY_CLASS ((AdgEntityClass *) adg_rdim_parent_class)
46 static void dispose (GObject
*object
);
47 static void local_changed (AdgEntity
*entity
);
48 static void invalidate (AdgEntity
*entity
);
49 static void arrange (AdgEntity
*entity
);
50 static void render (AdgEntity
*entity
,
52 static gchar
* default_value (AdgDim
*dim
);
53 static void update_geometry (AdgRDim
*rdim
);
54 static void update_entities (AdgRDim
*rdim
);
55 static void unset_trail (AdgRDim
*rdim
);
56 static void dispose_marker (AdgRDim
*rdim
);
57 static CpmlPath
* trail_callback (AdgTrail
*trail
,
61 G_DEFINE_TYPE(AdgRDim
, adg_rdim
, ADG_TYPE_DIM
);
65 adg_rdim_class_init(AdgRDimClass
*klass
)
67 GObjectClass
*gobject_class
;
68 AdgEntityClass
*entity_class
;
69 AdgDimClass
*dim_class
;
71 gobject_class
= (GObjectClass
*) klass
;
72 entity_class
= (AdgEntityClass
*) klass
;
73 dim_class
= (AdgDimClass
*) klass
;
75 g_type_class_add_private(klass
, sizeof(AdgRDimPrivate
));
77 gobject_class
->dispose
= dispose
;
79 entity_class
->local_changed
= local_changed
;
80 entity_class
->invalidate
= invalidate
;
81 entity_class
->arrange
= arrange
;
82 entity_class
->render
= render
;
84 dim_class
->default_value
= default_value
;
88 adg_rdim_init(AdgRDim
*rdim
)
91 cairo_path_data_t move_to
, line_to
;
93 data
= G_TYPE_INSTANCE_GET_PRIVATE(rdim
, ADG_TYPE_RDIM
, AdgRDimPrivate
);
94 move_to
.header
.type
= CAIRO_PATH_MOVE_TO
;
95 move_to
.header
.length
= 2;
96 line_to
.header
.type
= CAIRO_PATH_LINE_TO
;
97 line_to
.header
.length
= 2;
101 data
->geometry_arranged
= FALSE
;
103 data
->shift
.base
.x
= data
->shift
.base
.y
= 0;
104 cairo_matrix_init_identity(&data
->quote
.local_map
);
105 cairo_matrix_init_identity(&data
->quote
.global_map
);
107 data
->cpml
.path
.status
= CAIRO_STATUS_INVALID_PATH_DATA
;
108 data
->cpml
.path
.data
= data
->cpml
.data
;
109 data
->cpml
.path
.num_data
= G_N_ELEMENTS(data
->cpml
.data
);
110 data
->cpml
.path
.data
[0] = move_to
;
111 data
->cpml
.path
.data
[2] = line_to
;
112 data
->cpml
.path
.data
[4] = move_to
;
113 data
->cpml
.path
.data
[6] = line_to
;
119 dispose(GObject
*object
)
121 dispose_marker((AdgRDim
*) object
);
123 if (PARENT_OBJECT_CLASS
->dispose
)
124 PARENT_OBJECT_CLASS
->dispose(object
);
131 * Creates a new uninitialized radial dimension. To be useful, you
132 * need at least define the center of the arc to quote (ref1) and
133 * a point on the arc (ref2) with adg_dim_set_ref() and the
134 * position of the quote with adg_dim_set_pos().
136 * Returns: a newly created quote
141 return g_object_new(ADG_TYPE_RDIM
, NULL
);
146 * @center: center of the arc to quote
147 * @radius: where the quote must be applied on the arc
148 * @pos: position of the quote text
150 * Creates a new quote by specifying explicitely all the needed
151 * data to get a valid quote.
153 * Returns: a newly created quote
156 adg_rdim_new_full(const AdgPair
*center
, const AdgPair
*radius
,
162 rdim
= adg_rdim_new();
163 dim
= (AdgDim
*) rdim
;
165 adg_dim_set_ref(dim
, center
, radius
);
166 adg_dim_set_pos(dim
, pos
);
172 * adg_rdim_new_full_explicit:
173 * @center_x: x coordinate of the center of the arc to quote
174 * @center_y: y coordinate of the center of the arc to quote
175 * @radius_x: x coordiante where the quote must be applied on the arc
176 * @radius_y: y coordiante where the quote must be applied on the arc
177 * @pos_x: x coordinate of the quote text
178 * @pos_y: y coordinate of the quote text
180 * Does the same job of adg_rdim_full() but using specific coordinates
181 * instead of AdgPair structures.
182 * data to get a valid quote.
184 * Returns: a newly created quote
187 adg_rdim_new_full_explicit(gdouble center_x
, gdouble center_y
,
188 gdouble radius_x
, gdouble radius_y
,
189 gdouble pos_x
, gdouble pos_y
)
191 AdgPair center
, radius
, pos
;
200 return adg_rdim_new_full(¢er
, &radius
, &pos
);
204 * adg_rdim_new_full_from_model:
205 * @model: the model from which the named pairs are taken
206 * @center: the center point of the arc to quote
207 * @radius: an arbitrary point on the arc
208 * @pos: the position reference
210 * Creates a new radial dimension, specifing all the needed properties in
211 * one shot and using named pairs from @model.
213 * Returns: the newly created radial dimension entity
216 adg_rdim_new_full_from_model(AdgModel
*model
, const gchar
*center
,
217 const gchar
*radius
, const gchar
*pos
)
219 AdgDim
*dim
= g_object_new(ADG_TYPE_RDIM
, NULL
);
221 adg_dim_set_ref_from_model(dim
, model
, center
, radius
);
222 adg_dim_set_pos_from_model(dim
, model
, pos
);
224 return (AdgRDim
*) dim
;
229 local_changed(AdgEntity
*entity
)
231 unset_trail((AdgRDim
*) entity
);
233 if (PARENT_ENTITY_CLASS
->local_changed
)
234 PARENT_ENTITY_CLASS
->local_changed(entity
);
238 invalidate(AdgEntity
*entity
)
241 AdgRDimPrivate
*data
;
243 rdim
= (AdgRDim
*) entity
;
246 dispose_marker(rdim
);
247 data
->geometry_arranged
= FALSE
;
250 if (PARENT_ENTITY_CLASS
->invalidate
)
251 PARENT_ENTITY_CLASS
->invalidate(entity
);
255 arrange(AdgEntity
*entity
)
259 AdgRDimPrivate
*data
;
261 AdgDimStyle
*dim_style
;
263 const AdgMatrix
*local
;
264 AdgPair ref1
, ref2
, base
;
267 if (PARENT_ENTITY_CLASS
->arrange
)
268 PARENT_ENTITY_CLASS
->arrange(entity
);
270 rdim
= (AdgRDim
*) entity
;
271 dim
= (AdgDim
*) rdim
;
273 quote
= adg_dim_get_quote(dim
);
275 update_geometry(rdim
);
276 update_entities(rdim
);
278 if (data
->cpml
.path
.status
== CAIRO_STATUS_SUCCESS
) {
279 AdgEntity
*quote_entity
= (AdgEntity
*) quote
;
280 adg_entity_set_global_map(quote_entity
, &data
->quote
.global_map
);
281 adg_entity_set_local_map(quote_entity
, &data
->quote
.local_map
);
285 dim_style
= GET_DIM_STYLE(dim
);
286 outside
= adg_dim_get_outside(dim
);
287 if (outside
== ADG_THREE_STATE_UNKNOWN
)
288 outside
= ADG_THREE_STATE_OFF
;
290 local
= adg_entity_get_local_matrix(entity
);
291 cpml_pair_copy(&ref1
, adg_dim_get_ref1(dim
));
292 cpml_pair_copy(&ref2
, adg_dim_get_ref2(dim
));
293 cpml_pair_copy(&base
, &data
->point
.base
);
295 cpml_pair_transform(&ref1
, local
);
296 cpml_pair_transform(&ref2
, local
);
297 cpml_pair_transform(&base
, local
);
298 cpml_pair_add(&base
, &data
->shift
.base
);
301 cpml_pair_to_cairo(&base
, &data
->cpml
.data
[1]);
304 cpml_pair_to_cairo(&ref2
, &data
->cpml
.data
[3]);
307 data
->cpml
.data
[2].header
.length
= 2;
308 /* TODO: outside radius dimensions */
310 data
->cpml
.data
[2].header
.length
= 6;
313 data
->cpml
.path
.status
= CAIRO_STATUS_SUCCESS
;
316 AdgEntity
*quote_entity
;
319 quote_entity
= (AdgEntity
*) quote
;
320 cpml_pair_from_cairo(&pair
, &data
->cpml
.data
[1]);
322 cairo_matrix_init_translate(&map
, pair
.x
, pair
.y
);
323 cairo_matrix_rotate(&map
, data
->angle
);
324 adg_entity_set_global_map(quote_entity
, &map
);
326 adg_matrix_copy(&data
->quote
.global_map
,
327 adg_entity_get_global_map(quote_entity
));
328 adg_matrix_copy(&data
->quote
.local_map
,
329 adg_entity_get_local_map(quote_entity
));
332 if (data
->marker
!= NULL
) {
333 adg_marker_set_segment(data
->marker
, data
->trail
, outside
? 2 : 1);
334 adg_entity_local_changed((AdgEntity
*) data
->marker
);
337 /* TODO: compute the extents */
341 render(AdgEntity
*entity
, cairo_t
*cr
)
345 AdgRDimPrivate
*data
;
346 AdgDimStyle
*dim_style
;
348 const cairo_path_t
*cairo_path
;
350 rdim
= (AdgRDim
*) entity
;
351 dim
= (AdgDim
*) entity
;
353 dim_style
= GET_DIM_STYLE(dim
);
355 adg_style_apply((AdgStyle
*) dim_style
, entity
, cr
);
357 if (data
->marker
!= NULL
)
358 adg_entity_render((AdgEntity
*) data
->marker
, cr
);
360 adg_entity_render((AdgEntity
*) adg_dim_get_quote(dim
), cr
);
362 dress
= adg_dim_style_get_line_dress(dim_style
);
363 adg_entity_apply_dress(entity
, dress
, cr
);
365 cairo_path
= adg_trail_get_cairo_path(data
->trail
);
366 cairo_append_path(cr
, cairo_path
);
371 default_value(AdgDim
*dim
)
374 AdgRDimPrivate
*data
;
375 AdgDimStyle
*dim_style
;
378 rdim
= (AdgRDim
*) dim
;
380 dim_style
= GET_DIM_STYLE(dim
);
381 format
= adg_dim_style_get_number_format(dim_style
);
383 update_geometry(rdim
);
385 return g_strdup_printf(format
, data
->radius
);
389 update_geometry(AdgRDim
*rdim
)
391 AdgRDimPrivate
*data
;
393 AdgDimStyle
*dim_style
;
394 const AdgPair
*ref1
, *ref2
;
396 gdouble spacing
, level
, pos_distance
;
401 if (data
->geometry_arranged
)
404 dim
= (AdgDim
*) rdim
;
405 dim_style
= GET_DIM_STYLE(rdim
);
406 ref1
= adg_dim_get_ref1(dim
);
407 ref2
= adg_dim_get_ref2(dim
);
408 pos
= adg_dim_get_pos(dim
);
409 spacing
= adg_dim_style_get_baseline_spacing(dim_style
);
410 level
= adg_dim_get_level(dim
);
411 pos_distance
= cpml_pair_distance(pos
, ref1
);
412 cpml_pair_sub(cpml_pair_copy(&vector
, ref2
), ref1
);
413 if (cpml_pair_squared_distance(pos
, ref1
) <
414 cpml_pair_squared_distance(pos
, ref2
))
415 cpml_pair_negate(&vector
);
418 data
->radius
= cpml_pair_distance(&vector
, NULL
);
421 data
->angle
= adg_dim_quote_angle(dim
, cpml_vector_angle(&vector
));
424 cpml_pair_copy(&data
->point
.base
, &vector
);
425 cpml_vector_set_length(&data
->point
.base
, pos_distance
);
426 cpml_pair_add(&data
->point
.base
, ref1
);
429 cpml_pair_copy(&data
->shift
.base
, &vector
);
430 cpml_vector_set_length(&data
->shift
.base
, spacing
* level
);
432 data
->geometry_arranged
= TRUE
;
436 update_entities(AdgRDim
*rdim
)
438 AdgRDimPrivate
*data
;
439 AdgDimStyle
*dim_style
;
442 dim_style
= GET_DIM_STYLE(rdim
);
444 if (data
->trail
== NULL
)
445 data
->trail
= adg_trail_new(trail_callback
, rdim
);
447 if (data
->marker
== NULL
)
448 data
->marker
= adg_dim_style_marker2_new(dim_style
);
452 unset_trail(AdgRDim
*rdim
)
454 AdgRDimPrivate
*data
= rdim
->data
;
456 if (data
->trail
!= NULL
)
457 adg_model_clear((AdgModel
*) data
->trail
);
459 data
->cpml
.path
.status
= CAIRO_STATUS_INVALID_PATH_DATA
;
463 dispose_marker(AdgRDim
*rdim
)
465 AdgRDimPrivate
*data
= rdim
->data
;
467 if (data
->trail
!= NULL
) {
468 g_object_unref(data
->trail
);
472 if (data
->marker
!= NULL
) {
473 g_object_unref(data
->marker
);
479 trail_callback(AdgTrail
*trail
, gpointer user_data
)
482 AdgRDimPrivate
*data
;
484 rdim
= (AdgRDim
*) user_data
;
487 return &data
->cpml
.path
;