1 /* ADG - Automatic Drawing Generation
2 * Copyright (C) 2007,2008,2009,2010 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 #AdgLDim entity represents a linear dimension.
31 * All fields are private and should not be used directly.
32 * Use its public methods instead.
36 #include "adg-internal.h"
38 #include "adg-ldim-private.h"
39 #include "adg-dim-private.h"
40 #include "adg-dim-style.h"
42 #define PARENT_OBJECT_CLASS ((GObjectClass *) adg_ldim_parent_class)
43 #define PARENT_ENTITY_CLASS ((AdgEntityClass *) adg_ldim_parent_class)
54 static void dispose (GObject
*object
);
55 static void get_property (GObject
*object
,
59 static void set_property (GObject
*object
,
63 static void local_changed (AdgEntity
*entity
);
64 static void invalidate (AdgEntity
*entity
);
65 static void arrange (AdgEntity
*entity
);
66 static void render (AdgEntity
*entity
,
68 static gchar
* default_value (AdgDim
*dim
);
69 static void update_geometry (AdgLDim
*ldim
);
70 static void update_shift (AdgLDim
*ldim
);
71 static void update_entities (AdgLDim
*ldim
);
72 static void choose_flags (AdgLDim
*ldim
,
75 static void unset_trail (AdgLDim
*ldim
);
76 static void dispose_markers (AdgLDim
*ldim
);
77 static CpmlPath
* trail_callback (AdgTrail
*trail
,
81 G_DEFINE_TYPE(AdgLDim
, adg_ldim
, ADG_TYPE_DIM
);
85 adg_ldim_class_init(AdgLDimClass
*klass
)
87 GObjectClass
*gobject_class
;
88 AdgEntityClass
*entity_class
;
89 AdgDimClass
*dim_class
;
92 gobject_class
= (GObjectClass
*) klass
;
93 entity_class
= (AdgEntityClass
*) klass
;
94 dim_class
= (AdgDimClass
*) klass
;
96 g_type_class_add_private(klass
, sizeof(AdgLDimPrivate
));
98 gobject_class
->dispose
= dispose
;
99 gobject_class
->get_property
= get_property
;
100 gobject_class
->set_property
= set_property
;
102 entity_class
->local_changed
= local_changed
;
103 entity_class
->invalidate
= invalidate
;
104 entity_class
->arrange
= arrange
;
105 entity_class
->render
= render
;
107 dim_class
->default_value
= default_value
;
109 param
= g_param_spec_double("direction",
111 P_("The inclination angle of the extension lines"),
112 -G_MAXDOUBLE
, G_MAXDOUBLE
, ADG_DIR_RIGHT
,
113 G_PARAM_READWRITE
| G_PARAM_CONSTRUCT
);
114 g_object_class_install_property(gobject_class
, PROP_DIRECTION
, param
);
116 param
= g_param_spec_boolean("has-extension1",
117 P_("Has First Extension Line flag"),
118 P_("Show (TRUE) or hide (FALSE) the first extension line"),
119 TRUE
, G_PARAM_READWRITE
);
120 g_object_class_install_property(gobject_class
, PROP_HAS_EXTENSION1
, param
);
122 param
= g_param_spec_boolean("has-extension2",
123 P_("Has Second Extension Line flag"),
124 P_("Show (TRUE) or hide (FALSE) the second extension line"),
125 TRUE
, G_PARAM_READWRITE
);
126 g_object_class_install_property(gobject_class
, PROP_HAS_EXTENSION2
, param
);
130 adg_ldim_init(AdgLDim
*ldim
)
132 AdgLDimPrivate
*data
;
133 cairo_path_data_t move_to
, line_to
;
135 data
= G_TYPE_INSTANCE_GET_PRIVATE(ldim
, ADG_TYPE_LDIM
, AdgLDimPrivate
);
136 move_to
.header
.type
= CPML_MOVE
;
137 move_to
.header
.length
= 2;
138 line_to
.header
.type
= CPML_LINE
;
139 line_to
.header
.length
= 2;
142 data
->has_extension1
= TRUE
;
143 data
->has_extension2
= TRUE
;
145 data
->cpml
.path
.status
= CAIRO_STATUS_INVALID_PATH_DATA
;
146 data
->cpml
.path
.data
= data
->cpml
.data
;
147 data
->cpml
.path
.num_data
= G_N_ELEMENTS(data
->cpml
.data
);
148 data
->cpml
.path
.data
[0] = move_to
;
149 data
->cpml
.path
.data
[2] = line_to
;
150 data
->cpml
.path
.data
[4] = move_to
;
151 data
->cpml
.path
.data
[6] = line_to
;
152 data
->cpml
.path
.data
[8] = move_to
;
153 data
->cpml
.path
.data
[10] = line_to
;
154 data
->cpml
.path
.data
[12] = move_to
;
155 data
->cpml
.path
.data
[14] = line_to
;
156 data
->cpml
.path
.data
[16] = move_to
;
157 data
->cpml
.path
.data
[18] = line_to
;
160 data
->marker1
= NULL
;
161 data
->marker2
= NULL
;
163 data
->geometry
.is_arranged
= FALSE
;
164 data
->shift
.is_arranged
= FALSE
;
170 dispose(GObject
*object
)
172 dispose_markers((AdgLDim
*) object
);
174 if (PARENT_OBJECT_CLASS
->dispose
)
175 PARENT_OBJECT_CLASS
->dispose(object
);
179 get_property(GObject
*object
,
180 guint prop_id
, GValue
*value
, GParamSpec
*pspec
)
182 AdgLDimPrivate
*data
= ((AdgLDim
*) object
)->data
;
186 g_value_set_double(value
, data
->direction
);
188 case PROP_HAS_EXTENSION1
:
189 g_value_set_boolean(value
, data
->has_extension1
);
191 case PROP_HAS_EXTENSION2
:
192 g_value_set_boolean(value
, data
->has_extension2
);
195 G_OBJECT_WARN_INVALID_PROPERTY_ID(object
, prop_id
, pspec
);
201 set_property(GObject
*object
,
202 guint prop_id
, const GValue
*value
, GParamSpec
*pspec
)
204 AdgLDimPrivate
*data
= ((AdgLDim
*) object
)->data
;
208 data
->direction
= g_value_get_double(value
);
210 case PROP_HAS_EXTENSION1
:
211 data
->has_extension1
= g_value_get_boolean(value
);
213 case PROP_HAS_EXTENSION2
:
214 data
->has_extension2
= g_value_get_boolean(value
);
217 G_OBJECT_WARN_INVALID_PROPERTY_ID(object
, prop_id
, pspec
);
226 * Creates a new - undefined - linear dimension. You must, at least,
227 * define the reference points with adg_dim_set_ref(), the dimension
228 * direction with adg_ldim_set_direction() and the position reference
229 * using adg_dim_set_pos().
231 * Returns: the newly created linear dimension entity
236 return g_object_new(ADG_TYPE_LDIM
, NULL
);
241 * @ref1: the first reference point
242 * @ref2: the second reference point
243 * @pos: the position reference
244 * @direction: angle where to extend the dimension
246 * Creates a new linear dimension, specifing all the needed properties in
249 * Returns: the newly created linear dimension entity
252 adg_ldim_new_full(const AdgPair
*ref1
, const AdgPair
*ref2
,
253 const AdgPair
*pos
, gdouble direction
)
258 ldim
= g_object_new(ADG_TYPE_LDIM
, "direction", direction
, NULL
);
259 dim
= (AdgDim
*) ldim
;
261 adg_dim_set_ref(dim
, ref1
, ref2
);
262 adg_dim_set_pos(dim
, pos
);
268 * adg_ldim_new_full_explicit:
269 * @ref1_x: the x coordinate of the first reference point
270 * @ref1_y: the y coordinate of the first reference point
271 * @ref2_x: the x coordinate of the second reference point
272 * @ref2_y: the y coordinate of the second reference point
273 * @pos_x: the x coordinate of the position reference
274 * @pos_y: the y coordinate of the position reference
275 * @direction: angle where to extend the dimension
277 * Wrappes adg_ldim_new_full() with explicit values.
279 * Returns: the newly created linear dimension entity
282 adg_ldim_new_full_explicit(gdouble ref1_x
, gdouble ref1_y
,
283 gdouble ref2_x
, gdouble ref2_y
,
284 gdouble pos_x
, gdouble pos_y
, gdouble direction
)
297 return adg_ldim_new_full(&ref1
, &ref2
, &pos
, direction
);
301 * adg_ldim_new_full_from_model:
302 * @model: the model from which the named pairs are taken
303 * @ref1: the first reference point
304 * @ref2: the second reference point
305 * @pos: the position reference
306 * @direction: angle where to extend the dimension
308 * Creates a new linear dimension, specifing all the needed properties in
309 * one shot and using named pairs from @model.
311 * Returns: the newly created linear dimension entity
314 adg_ldim_new_full_from_model(AdgModel
*model
,
315 const gchar
*ref1
, const gchar
*ref2
,
316 const gchar
*pos
, gdouble direction
)
321 ldim
= g_object_new(ADG_TYPE_LDIM
, "direction", direction
, NULL
);
322 dim
= (AdgDim
*) ldim
;
324 adg_dim_set_ref_from_model(dim
, model
, ref1
, ref2
);
325 adg_dim_set_pos_from_model(dim
, model
, pos
);
331 * adg_ldim_set_direction:
332 * @ldim: an #AdgLDim entity
333 * @direction: an angle value, in radians
335 * Sets the direction angle where to extend @ldim.
338 adg_ldim_set_direction(AdgLDim
*ldim
, gdouble direction
)
340 AdgLDimPrivate
*data
;
342 g_return_if_fail(ADG_IS_LDIM(ldim
));
345 data
->direction
= direction
;
347 g_object_notify((GObject
*) ldim
, "direction");
351 * adg_ldim_get_direction:
352 * @ldim: an #AdgLDim entity
354 * Gets the direction where @ldim will extend.
356 * Returns: the direction angle in radians
359 adg_ldim_get_direction(AdgLDim
*ldim
)
361 AdgLDimPrivate
*data
;
363 g_return_val_if_fail(ADG_IS_LDIM(ldim
), 0);
367 return data
->direction
;
371 * adg_ldim_switch_extension1:
372 * @ldim: an #AdgLDim entity
373 * @new_state: the new state
375 * Shows (if @new_state is %TRUE) or hide (if @new_state is %FALSE)
376 * the first extension line of @ldim.
379 adg_ldim_switch_extension1(AdgLDim
*ldim
, gboolean new_state
)
381 AdgLDimPrivate
*data
;
383 g_return_if_fail(ADG_IS_LDIM(ldim
));
387 if (data
->has_extension1
!= new_state
) {
388 data
->has_extension1
= new_state
;
389 g_object_notify((GObject
*) ldim
, "has-extension1");
394 * adg_ldim_has_extension1:
395 * @ldim: an #AdgLDim entity
397 * Checks if @ldim should render also the first extension line.
399 * Returns: %TRUE on first extension line presents, %FALSE otherwise
402 adg_ldim_has_extension1(AdgLDim
*ldim
)
404 AdgLDimPrivate
*data
;
406 g_return_val_if_fail(ADG_IS_LDIM(ldim
), FALSE
);
410 return data
->has_extension1
;
414 * adg_ldim_switch_extension2:
415 * @ldim: an #AdgLDim entity
416 * @new_state: the new new_state
418 * Shows (if @new_state is %TRUE) or hide (if @new_state is %FALSE)
419 * the second extension line of @ldim.
422 adg_ldim_switch_extension2(AdgLDim
*ldim
, gboolean new_state
)
424 AdgLDimPrivate
*data
;
426 g_return_if_fail(ADG_IS_LDIM(ldim
));
430 if (data
->has_extension2
!= new_state
) {
431 data
->has_extension2
= new_state
;
432 g_object_notify((GObject
*) ldim
, "has-extension2");
437 * adg_ldim_has_extension2:
438 * @ldim: an #AdgLDim entity
440 * Checks if @ldim should render also the second extension line.
442 * Returns: %TRUE on first extension line presents, %FALSE otherwise
445 adg_ldim_has_extension2(AdgLDim
*ldim
)
447 AdgLDimPrivate
*data
;
449 g_return_val_if_fail(ADG_IS_LDIM(ldim
), FALSE
);
453 return data
->has_extension2
;
458 local_changed(AdgEntity
*entity
)
460 unset_trail((AdgLDim
*) entity
);
462 if (PARENT_ENTITY_CLASS
->local_changed
)
463 PARENT_ENTITY_CLASS
->local_changed(entity
);
467 invalidate(AdgEntity
*entity
)
470 AdgLDimPrivate
*data
;
472 ldim
= (AdgLDim
*) entity
;
475 dispose_markers(ldim
);
476 data
->geometry
.is_arranged
= FALSE
;
477 data
->shift
.is_arranged
= FALSE
;
480 if (PARENT_ENTITY_CLASS
->invalidate
)
481 PARENT_ENTITY_CLASS
->invalidate(entity
);
484 /* TODO: split the following crap in more manageable functions */
486 arrange(AdgEntity
*entity
)
490 AdgLDimPrivate
*data
;
492 AdgDimStyle
*dim_style
;
493 gboolean to_outside
, to_detach
;
494 const AdgMatrix
*local
;
495 AdgPair ref1
, ref2
, base1
, base2
;
500 if (PARENT_ENTITY_CLASS
->arrange
)
501 PARENT_ENTITY_CLASS
->arrange(entity
);
503 ldim
= (AdgLDim
*) entity
;
504 dim
= (AdgDim
*) ldim
;
506 quote
= adg_dim_get_quote(dim
);
508 update_geometry(ldim
);
510 update_entities(ldim
);
512 /* Check for cached result */
513 if (data
->cpml
.path
.status
== CAIRO_STATUS_SUCCESS
) {
514 AdgEntity
*quote_entity
= (AdgEntity
*) quote
;
515 adg_entity_set_global_map(quote_entity
, &data
->quote
.global_map
);
519 choose_flags(ldim
, &to_outside
, &to_detach
);
521 dim_style
= GET_DIM_STYLE(dim
);
522 local
= adg_entity_get_local_matrix(entity
);
523 cpml_pair_copy(&ref1
, adg_dim_get_ref1(dim
));
524 cpml_pair_copy(&ref2
, adg_dim_get_ref2(dim
));
525 cpml_pair_copy(&base1
, &data
->geometry
.base1
);
526 cpml_pair_copy(&base2
, &data
->geometry
.base2
);
528 cpml_pair_transform(&ref1
, local
);
529 cpml_pair_transform(&ref2
, local
);
530 cpml_pair_transform(&base1
, local
);
531 base1
.x
+= data
->shift
.base
.x
;
532 base1
.y
+= data
->shift
.base
.y
;
533 cpml_pair_transform(&base2
, local
);
534 base2
.x
+= data
->shift
.base
.x
;
535 base2
.y
+= data
->shift
.base
.y
;
537 pair
.x
= ref1
.x
+ data
->shift
.from
.x
;
538 pair
.y
= ref1
.y
+ data
->shift
.from
.y
;
539 cpml_pair_to_cairo(&pair
, &data
->cpml
.data
[13]);
541 cpml_pair_to_cairo(&base1
, &data
->cpml
.data
[1]);
543 pair
.x
= base1
.x
+ data
->shift
.to
.x
;
544 pair
.y
= base1
.y
+ data
->shift
.to
.y
;
545 cpml_pair_to_cairo(&pair
, &data
->cpml
.data
[15]);
547 pair
.x
= ref2
.x
+ data
->shift
.from
.x
;
548 pair
.y
= ref2
.y
+ data
->shift
.from
.y
;
549 cpml_pair_to_cairo(&pair
, &data
->cpml
.data
[17]);
551 cpml_pair_to_cairo(&base2
, &data
->cpml
.data
[3]);
553 pair
.x
= base2
.x
+ data
->shift
.to
.x
;
554 pair
.y
= base2
.y
+ data
->shift
.to
.y
;
555 cpml_pair_to_cairo(&pair
, &data
->cpml
.data
[19]);
557 /* Calculate the outside segments */
562 beyond
= adg_dim_style_get_beyond(dim_style
);
563 cpml_pair_from_cairo(&pair
, &data
->cpml
.data
[1]);
565 cpml_pair_from_cairo(&vector
, &data
->cpml
.data
[3]);
568 cpml_vector_set_length(&vector
, beyond
);
570 cpml_pair_from_cairo(&pair
, &data
->cpml
.data
[1]);
571 cpml_pair_to_cairo(&pair
, &data
->cpml
.data
[5]);
575 cpml_pair_to_cairo(&pair
, &data
->cpml
.data
[7]);
577 cpml_pair_from_cairo(&pair
, &data
->cpml
.data
[3]);
578 cpml_pair_to_cairo(&pair
, &data
->cpml
.data
[11]);
582 cpml_pair_to_cairo(&pair
, &data
->cpml
.data
[9]);
584 data
->cpml
.data
[2].header
.length
= 2;
587 data
->cpml
.data
[2].header
.length
= 10;
591 data
->cpml
.data
[10].header
.length
= 2;
592 extents
.is_defined
= FALSE
;
596 AdgEntity
*quote_entity
;
598 AdgPair middle
, factor
;
601 quote_entity
= (AdgEntity
*) quote
;
602 angle
= adg_dim_quote_angle(dim
, data
->direction
+ G_PI_2
);
603 middle
.x
= (base1
.x
+ base2
.x
) / 2;
604 middle
.y
= (base1
.y
+ base2
.y
) / 2;
605 factor
.x
= factor
.y
= 0;
608 /* Detached quote: position the quote at "pos" */
609 AdgPair p_line
, p_quote
;
610 gdouble same_sd
, opposite_sd
, quote_size
;
612 cairo_path_data_t
*to_extend
;
614 /* Set "pair" to the properly converted "pos" coordinates */
615 cpml_pair_copy(&pair
, adg_dim_get_pos(dim
));
616 cpml_pair_transform(&pair
, local
);
617 pair
.x
+= data
->shift
.base
.x
;
618 pair
.y
+= data
->shift
.base
.y
;
620 /* Taking "middle" as the reference, check if the quote
621 * is on the _left_ or on the _right_ side. This is got
622 * by checking if (pos-middle) is closer to the quote
623 * vector or to the negated quote vector by using an
624 * algorithm based on the squared distances. */
625 p_line
.x
= pair
.x
- middle
.x
;
626 p_line
.y
= pair
.y
- middle
.y
;
627 cpml_vector_from_angle(&p_quote
, angle
);
629 same_sd
= cpml_pair_squared_distance(&p_quote
, &p_line
);
630 p_quote
.x
= -p_quote
.x
;
631 p_quote
.y
= -p_quote
.y
;
632 opposite_sd
= cpml_pair_squared_distance(&p_quote
, &p_line
);
633 quote_size
= adg_entity_get_extents(quote_entity
)->size
.x
;
635 /* Properly align the quote, depending on its side */
636 if (same_sd
> opposite_sd
) {
640 p_quote
.x
= -p_quote
.x
;
641 p_quote
.y
= -p_quote
.y
;
644 cpml_vector_set_length(&p_quote
, quote_size
);
648 /* Extends the base line to include the "p_quote" pair,
649 * that is underline a detached quote */
650 if (cpml_pair_squared_distance(&p_quote
, &base1
) >
651 cpml_pair_squared_distance(&p_quote
, &base2
))
657 to_extend
= &data
->cpml
.data
[n_side
== 1 ? 7 : 9];
659 to_extend
= &data
->cpml
.data
[9];
660 cpml_pair_to_cairo(&middle
, &data
->cpml
.data
[9]);
661 cpml_pair_to_cairo(n_side
== 1 ? &base1
: &base2
,
662 &data
->cpml
.data
[11]);
663 data
->cpml
.data
[2].header
.length
= 6;
667 cpml_pair_from_cairo(&p_line
, to_extend
);
669 /* Extend the base line only if needed */
670 if (cpml_pair_squared_distance(&p_quote
, &middle
) >
671 cpml_pair_squared_distance(&p_line
, &middle
))
672 cpml_pair_to_cairo(&p_quote
, to_extend
);
674 /* Center the quote in the middle of the base line */
676 cpml_pair_copy(&pair
, &middle
);
679 adg_alignment_set_factor(quote
, &factor
);
680 cairo_matrix_init_translate(&map
, pair
.x
, pair
.y
);
681 cairo_matrix_rotate(&map
, angle
);
682 adg_entity_set_global_map(quote_entity
, &map
);
683 adg_entity_arrange(quote_entity
);
684 cpml_extents_add(&extents
, adg_entity_get_extents(quote_entity
));
686 adg_matrix_copy(&data
->quote
.global_map
,
687 adg_entity_get_global_map(quote_entity
));
690 /* Play with header lengths to show or hide the extension lines */
691 if (data
->has_extension1
) {
692 data
->cpml
.data
[14].header
.length
= data
->has_extension2
? 2 : 6;
694 data
->cpml
.data
[14].header
.length
= 2;
695 data
->cpml
.data
[n
].header
.length
+= 4;
696 if (!data
->has_extension2
)
697 data
->cpml
.data
[n
].header
.length
+= 4;
700 data
->cpml
.path
.status
= CAIRO_STATUS_SUCCESS
;
701 cpml_extents_add(&extents
, adg_trail_get_extents(data
->trail
));
703 if (data
->marker1
!= NULL
) {
704 AdgEntity
*marker1_entity
= (AdgEntity
*) data
->marker1
;
705 adg_marker_set_segment(data
->marker1
, data
->trail
, to_outside
? 2 : 1);
706 adg_entity_arrange(marker1_entity
);
707 adg_entity_local_changed(marker1_entity
);
708 cpml_extents_add(&extents
, adg_entity_get_extents(marker1_entity
));
711 if (data
->marker2
!= NULL
) {
712 AdgEntity
*marker2_entity
= (AdgEntity
*) data
->marker2
;
713 adg_marker_set_segment(data
->marker2
, data
->trail
, to_outside
? 3 : 1);
714 adg_entity_local_changed(marker2_entity
);
715 adg_entity_arrange(marker2_entity
);
716 cpml_extents_add(&extents
, adg_entity_get_extents(marker2_entity
));
719 adg_entity_set_extents(entity
, &extents
);
723 render(AdgEntity
*entity
, cairo_t
*cr
)
727 AdgLDimPrivate
*data
;
728 AdgDimStyle
*dim_style
;
730 const cairo_path_t
*cairo_path
;
732 ldim
= (AdgLDim
*) entity
;
733 dim
= (AdgDim
*) entity
;
735 dim_style
= GET_DIM_STYLE(dim
);
737 adg_style_apply((AdgStyle
*) dim_style
, entity
, cr
);
739 if (data
->marker1
!= NULL
)
740 adg_entity_render((AdgEntity
*) data
->marker1
, cr
);
742 if (data
->marker2
!= NULL
)
743 adg_entity_render((AdgEntity
*) data
->marker2
, cr
);
745 adg_entity_render((AdgEntity
*) adg_dim_get_quote(dim
), cr
);
747 dress
= adg_dim_style_get_line_dress(dim_style
);
748 adg_entity_apply_dress(entity
, dress
, cr
);
750 cairo_path
= adg_trail_get_cairo_path(data
->trail
);
751 cairo_append_path(cr
, cairo_path
);
756 default_value(AdgDim
*dim
)
759 AdgLDimPrivate
*data
;
760 AdgDimStyle
*dim_style
;
763 ldim
= (AdgLDim
*) dim
;
765 dim_style
= GET_DIM_STYLE(dim
);
766 format
= adg_dim_style_get_number_format(dim_style
);
768 update_geometry(ldim
);
770 return g_strdup_printf(format
, data
->geometry
.distance
);
774 update_geometry(AdgLDim
*ldim
)
776 AdgLDimPrivate
*data
;
778 const AdgPair
*ref1
, *ref2
;
780 CpmlVector baseline
, extension
;
785 if (data
->geometry
.is_arranged
)
788 dim
= (AdgDim
*) ldim
;
789 ref1
= adg_dim_get_ref1(dim
);
790 ref2
= adg_dim_get_ref2(dim
);
791 pos
= adg_dim_get_pos(dim
);
792 cpml_vector_from_angle(&extension
, data
->direction
);
793 cpml_pair_copy(&baseline
, &extension
);
794 cpml_vector_normal(&baseline
);
796 d
= extension
.y
* baseline
.x
-
797 extension
.x
* baseline
.y
;
798 g_return_if_fail(d
!= 0);
800 k
= ((pos
->y
- ref1
->y
) * baseline
.x
-
801 (pos
->x
- ref1
->x
) * baseline
.y
) / d
;
802 data
->geometry
.base1
.x
= ref1
->x
+ k
* extension
.x
;
803 data
->geometry
.base1
.y
= ref1
->y
+ k
* extension
.y
;
805 k
= ((pos
->y
- ref2
->y
) * baseline
.x
-
806 (pos
->x
- ref2
->x
) * baseline
.y
) / d
;
807 data
->geometry
.base2
.x
= ref2
->x
+ k
* extension
.x
;
808 data
->geometry
.base2
.y
= ref2
->y
+ k
* extension
.y
;
810 data
->geometry
.distance
= cpml_pair_distance(&data
->geometry
.base1
,
811 &data
->geometry
.base2
);
813 data
->geometry
.is_arranged
= TRUE
;
817 update_shift(AdgLDim
*ldim
)
819 AdgLDimPrivate
*data
;
820 AdgDimStyle
*dim_style
;
821 gdouble from_offset
, to_offset
;
822 gdouble baseline_spacing
, level
;
827 if (data
->shift
.is_arranged
)
830 dim_style
= GET_DIM_STYLE(ldim
);
831 from_offset
= adg_dim_style_get_from_offset(dim_style
);
832 to_offset
= adg_dim_style_get_to_offset(dim_style
);
833 baseline_spacing
= adg_dim_style_get_baseline_spacing(dim_style
);
834 level
= adg_dim_get_level((AdgDim
*) ldim
);
836 cpml_vector_from_angle(&vector
, data
->direction
);
838 cpml_vector_set_length(&vector
, from_offset
);
839 cpml_pair_copy(&data
->shift
.from
, &vector
);
841 cpml_vector_set_length(&vector
, to_offset
);
842 cpml_pair_copy(&data
->shift
.to
, &vector
);
844 cpml_vector_set_length(&vector
, level
* baseline_spacing
);
845 cpml_pair_copy(&data
->shift
.base
, &vector
);
847 data
->shift
.is_arranged
= TRUE
;
851 update_entities(AdgLDim
*ldim
)
853 AdgLDimPrivate
*data
;
854 AdgDimStyle
*dim_style
;
857 dim_style
= GET_DIM_STYLE(ldim
);
859 if (data
->trail
== NULL
)
860 data
->trail
= adg_trail_new(trail_callback
, ldim
);
862 if (data
->marker1
== NULL
)
863 data
->marker1
= adg_dim_style_marker1_new(dim_style
);
865 if (data
->marker2
== NULL
)
866 data
->marker2
= adg_dim_style_marker2_new(dim_style
);
870 choose_flags(AdgLDim
*ldim
, gboolean
*to_outside
, gboolean
*to_detach
)
873 AdgThreeState outside
, detached
;
874 AdgLDimPrivate
*data
;
876 const AdgMatrix
*local
;
877 gdouble available_space
, markers_space
, quote_space
;
879 dim
= (AdgDim
*) ldim
;
880 outside
= adg_dim_get_outside(dim
);
881 detached
= adg_dim_get_detached(dim
);
883 *to_outside
= outside
== ADG_THREE_STATE_ON
;
884 *to_detach
= detached
== ADG_THREE_STATE_ON
;
886 /* On explicit flags, no further investigation is required */
887 if (outside
!= ADG_THREE_STATE_UNKNOWN
&&
888 detached
!= ADG_THREE_STATE_UNKNOWN
)
892 quote
= (AdgEntity
*) adg_dim_get_quote((AdgDim
*) ldim
);
893 local
= adg_entity_get_local_matrix((AdgEntity
*) ldim
);
894 available_space
= data
->geometry
.distance
* local
->xx
;
896 if (outside
== ADG_THREE_STATE_ON
)
900 (data
->marker1
== NULL
? 0 : adg_marker_get_size(data
->marker1
)) +
901 (data
->marker2
== NULL
? 0 : adg_marker_get_size(data
->marker2
));
903 /* Leave at least 0.25 marker_space between the markers */
904 if (detached
== ADG_THREE_STATE_ON
)
905 quote_space
= markers_space
* 0.25;
907 quote_space
= adg_entity_get_extents(quote
)->size
.x
;
909 if (outside
== ADG_THREE_STATE_UNKNOWN
&&
910 detached
== ADG_THREE_STATE_UNKNOWN
) {
911 /* Both flags need to be choosed */
912 if (quote_space
+ markers_space
< available_space
) {
915 } else if (quote_space
< available_space
) {
920 *to_outside
= markers_space
* 1.25 > available_space
;
922 } else if (outside
== ADG_THREE_STATE_UNKNOWN
) {
923 /* Only the outside flag may be guessed */
924 *to_outside
= quote_space
+ markers_space
> available_space
;
926 /* Only the detached flag may be guessed */
927 *to_detach
= quote_space
+ markers_space
> available_space
;
932 unset_trail(AdgLDim
*ldim
)
934 AdgLDimPrivate
*data
= ldim
->data
;
936 if (data
->trail
!= NULL
)
937 adg_model_clear((AdgModel
*) data
->trail
);
939 data
->cpml
.path
.status
= CAIRO_STATUS_INVALID_PATH_DATA
;
943 dispose_markers(AdgLDim
*ldim
)
945 AdgLDimPrivate
*data
= ldim
->data
;
947 if (data
->trail
!= NULL
) {
948 g_object_unref(data
->trail
);
952 if (data
->marker1
!= NULL
) {
953 g_object_unref(data
->marker1
);
954 data
->marker1
= NULL
;
957 if (data
->marker2
!= NULL
) {
958 g_object_unref(data
->marker2
);
959 data
->marker2
= NULL
;
964 trail_callback(AdgTrail
*trail
, gpointer user_data
)
967 AdgLDimPrivate
*data
;
969 ldim
= (AdgLDim
*) user_data
;
972 return &data
->cpml
.path
;