1 /* ADG - Automatic Drawing Generation
2 * Copyright (C) 2007-2019 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.
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-container.h"
42 #include "adg-alignment.h"
43 #include "adg-model.h"
44 #include "adg-point.h"
45 #include "adg-trail.h"
46 #include "adg-marker.h"
47 #include "adg-style.h"
48 #include "adg-dim-style.h"
49 #include "adg-textual.h"
50 #include "adg-toy-text.h"
52 #include "adg-dim-private.h"
55 #include "adg-ldim-private.h"
58 #define _ADG_OLD_OBJECT_CLASS ((GObjectClass *) adg_ldim_parent_class)
59 #define _ADG_OLD_ENTITY_CLASS ((AdgEntityClass *) adg_ldim_parent_class)
62 G_DEFINE_TYPE_WITH_PRIVATE(AdgLDim
, adg_ldim
, ADG_TYPE_DIM
)
72 static void _adg_dispose (GObject
*object
);
73 static void _adg_get_property (GObject
*object
,
77 static void _adg_set_property (GObject
*object
,
81 static void _adg_global_changed (AdgEntity
*entity
);
82 static void _adg_local_changed (AdgEntity
*entity
);
83 static void _adg_invalidate (AdgEntity
*entity
);
84 static void _adg_arrange (AdgEntity
*entity
);
85 static void _adg_render (AdgEntity
*entity
,
87 static gchar
* _adg_default_value (AdgDim
*dim
);
88 static gboolean
_adg_compute_geometry (AdgDim
*dim
);
89 static void _adg_update_shift (AdgLDim
*ldim
);
90 static void _adg_update_entities (AdgLDim
*ldim
);
91 static void _adg_choose_flags (AdgLDim
*ldim
,
94 static void _adg_update_quote (AdgLDim
*ldim
,
101 static void _adg_update_extents (AdgLDim
*ldim
);
102 static void _adg_unset_trail (AdgLDim
*ldim
);
103 static void _adg_dispose_trail (AdgLDim
*ldim
);
104 static void _adg_dispose_markers (AdgLDim
*ldim
);
105 static cairo_path_t
* _adg_trail_callback (AdgTrail
*trail
,
110 adg_ldim_class_init(AdgLDimClass
*klass
)
112 GObjectClass
*gobject_class
;
113 AdgEntityClass
*entity_class
;
114 AdgDimClass
*dim_class
;
117 gobject_class
= (GObjectClass
*) klass
;
118 entity_class
= (AdgEntityClass
*) klass
;
119 dim_class
= (AdgDimClass
*) klass
;
121 gobject_class
->dispose
= _adg_dispose
;
122 gobject_class
->get_property
= _adg_get_property
;
123 gobject_class
->set_property
= _adg_set_property
;
125 entity_class
->global_changed
= _adg_global_changed
;
126 entity_class
->local_changed
= _adg_local_changed
;
127 entity_class
->invalidate
= _adg_invalidate
;
128 entity_class
->arrange
= _adg_arrange
;
129 entity_class
->render
= _adg_render
;
131 dim_class
->default_value
= _adg_default_value
;
132 dim_class
->compute_geometry
= _adg_compute_geometry
;
134 param
= g_param_spec_double("direction",
136 P_("The inclination angle of the extension lines"),
137 -G_PI
, G_PI
, ADG_DIR_RIGHT
,
138 G_PARAM_READWRITE
| G_PARAM_CONSTRUCT
);
139 g_object_class_install_property(gobject_class
, PROP_DIRECTION
, param
);
141 param
= g_param_spec_boolean("has-extension1",
142 P_("Has First Extension Line flag"),
143 P_("Show (TRUE) or hide (FALSE) the first extension line"),
144 TRUE
, G_PARAM_READWRITE
);
145 g_object_class_install_property(gobject_class
, PROP_HAS_EXTENSION1
, param
);
147 param
= g_param_spec_boolean("has-extension2",
148 P_("Has Second Extension Line flag"),
149 P_("Show (TRUE) or hide (FALSE) the second extension line"),
150 TRUE
, G_PARAM_READWRITE
);
151 g_object_class_install_property(gobject_class
, PROP_HAS_EXTENSION2
, param
);
155 adg_ldim_init(AdgLDim
*ldim
)
157 AdgLDimPrivate
*data
= adg_ldim_get_instance_private(ldim
);
158 cairo_path_data_t move_to
, line_to
;
160 move_to
.header
.type
= CPML_MOVE
;
161 move_to
.header
.length
= 2;
162 line_to
.header
.type
= CPML_LINE
;
163 line_to
.header
.length
= 2;
165 data
->direction
= ADG_DIR_RIGHT
;
166 data
->has_extension1
= TRUE
;
167 data
->has_extension2
= TRUE
;
169 data
->cairo
.path
.status
= CAIRO_STATUS_INVALID_PATH_DATA
;
170 data
->cairo
.path
.data
= data
->cairo
.data
;
171 data
->cairo
.path
.num_data
= G_N_ELEMENTS(data
->cairo
.data
);
172 data
->cairo
.path
.data
[0] = move_to
;
173 data
->cairo
.path
.data
[2] = line_to
;
174 data
->cairo
.path
.data
[4] = move_to
;
175 data
->cairo
.path
.data
[6] = line_to
;
176 data
->cairo
.path
.data
[8] = move_to
;
177 data
->cairo
.path
.data
[10] = line_to
;
178 data
->cairo
.path
.data
[12] = move_to
;
179 data
->cairo
.path
.data
[14] = line_to
;
180 data
->cairo
.path
.data
[16] = move_to
;
181 data
->cairo
.path
.data
[18] = line_to
;
184 data
->marker1
= NULL
;
185 data
->marker2
= NULL
;
189 _adg_dispose(GObject
*object
)
191 AdgLDim
*ldim
= (AdgLDim
*) object
;
193 _adg_dispose_trail(ldim
);
194 _adg_dispose_markers(ldim
);
196 if (_ADG_OLD_OBJECT_CLASS
->dispose
)
197 _ADG_OLD_OBJECT_CLASS
->dispose(object
);
201 _adg_get_property(GObject
*object
, guint prop_id
,
202 GValue
*value
, GParamSpec
*pspec
)
204 AdgLDimPrivate
*data
= adg_ldim_get_instance_private((AdgLDim
*) object
);
208 g_value_set_double(value
, data
->direction
);
210 case PROP_HAS_EXTENSION1
:
211 g_value_set_boolean(value
, data
->has_extension1
);
213 case PROP_HAS_EXTENSION2
:
214 g_value_set_boolean(value
, data
->has_extension2
);
217 G_OBJECT_WARN_INVALID_PROPERTY_ID(object
, prop_id
, pspec
);
223 _adg_set_property(GObject
*object
, guint prop_id
,
224 const GValue
*value
, GParamSpec
*pspec
)
226 AdgLDimPrivate
*data
= adg_ldim_get_instance_private((AdgLDim
*) object
);
230 data
->direction
= cpml_angle(g_value_get_double(value
));
232 case PROP_HAS_EXTENSION1
:
233 data
->has_extension1
= g_value_get_boolean(value
);
235 case PROP_HAS_EXTENSION2
:
236 data
->has_extension2
= g_value_get_boolean(value
);
239 G_OBJECT_WARN_INVALID_PROPERTY_ID(object
, prop_id
, pspec
);
248 * Creates a new - undefined - linear dimension. You must, at least,
249 * define the start of the dimension in #AdgDim:ref1, the end in
250 * #AdgDim:ref2 and the position of the quote in #AdgDim:pos using
251 * any valid #AdgDim method. The director of the dimension (that is,
252 * if it is horizontal, vertical or oblique at a specific angle)
253 * should be specified with adg_ldim_set_direction().
255 * Returns: the newly created linear dimension entity
262 return g_object_new(ADG_TYPE_LDIM
, NULL
);
267 * @ref1: (allow-none): the first reference point
268 * @ref2: (allow-none): the second reference point
269 * @pos: (allow-none): the position reference
270 * @direction: angle where to extend the dimension
272 * Creates a new linear dimension, specifing all the needed properties in
275 * Returns: the newly created linear dimension entity
280 adg_ldim_new_full(const CpmlPair
*ref1
, const CpmlPair
*ref2
,
281 const CpmlPair
*pos
, gdouble direction
)
286 ldim
= adg_ldim_new();
287 dim
= (AdgDim
*) ldim
;
290 adg_dim_set_ref1_from_pair(dim
, ref1
);
293 adg_dim_set_ref2_from_pair(dim
, ref2
);
296 adg_dim_set_pos_from_pair(dim
, pos
);
298 adg_ldim_set_direction(ldim
, direction
);
303 * adg_ldim_new_full_explicit:
304 * @ref1_x: the x coordinate of the first reference point
305 * @ref1_y: the y coordinate of the first reference point
306 * @ref2_x: the x coordinate of the second reference point
307 * @ref2_y: the y coordinate of the second reference point
308 * @pos_x: the x coordinate of the position reference
309 * @pos_y: the y coordinate of the position reference
310 * @direction: angle where to extend the dimension
312 * Wrappes adg_ldim_new_full() with explicit values.
314 * Returns: the newly created linear dimension entity
319 adg_ldim_new_full_explicit(gdouble ref1_x
, gdouble ref1_y
,
320 gdouble ref2_x
, gdouble ref2_y
,
321 gdouble pos_x
, gdouble pos_y
, gdouble direction
)
334 return adg_ldim_new_full(&ref1
, &ref2
, &pos
, direction
);
338 * adg_ldim_new_full_from_model:
339 * @model: (transfer none): the model from which the named pairs are taken
340 * @ref1: (allow-none): the first reference point
341 * @ref2: (allow-none): the second reference point
342 * @pos: (allow-none): the position reference
343 * @direction: angle where to extend the dimension
345 * Creates a new linear dimension, specifing all the needed properties in
346 * one shot and using named pairs from @model.
348 * Returns: the newly created linear dimension entity
353 adg_ldim_new_full_from_model(AdgModel
*model
,
354 const gchar
*ref1
, const gchar
*ref2
,
355 const gchar
*pos
, gdouble direction
)
360 g_return_val_if_fail(model
!= NULL
, NULL
);
362 ldim
= adg_ldim_new();
363 dim
= (AdgDim
*) ldim
;
366 adg_dim_set_ref1_from_model(dim
, model
, ref1
);
369 adg_dim_set_ref2_from_model(dim
, model
, ref2
);
372 adg_dim_set_pos_from_model(dim
, model
, pos
);
374 adg_ldim_set_direction(ldim
, direction
);
375 return (AdgLDim
*) dim
;
379 * adg_ldim_set_direction:
380 * @ldim: an #AdgLDim entity
381 * @direction: an angle value, in radians
383 * Sets the direction angle where to extend @ldim.
384 * @direction is normalized by cpml_angle() before being used.
389 adg_ldim_set_direction(AdgLDim
*ldim
, gdouble direction
)
391 g_return_if_fail(ADG_IS_LDIM(ldim
));
392 g_object_set(ldim
, "direction", direction
, NULL
);
396 * adg_ldim_get_direction:
397 * @ldim: an #AdgLDim entity
399 * Gets the direction where @ldim will extend.
401 * Returns: the direction angle in radians
406 adg_ldim_get_direction(AdgLDim
*ldim
)
408 AdgLDimPrivate
*data
;
410 g_return_val_if_fail(ADG_IS_LDIM(ldim
), 0);
412 data
= adg_ldim_get_instance_private(ldim
);
413 return data
->direction
;
417 * adg_ldim_switch_extension1:
418 * @ldim: an #AdgLDim entity
419 * @new_state: the new state
421 * Shows (if @new_state is <constant>TRUE</constant>) or hide (if
422 * @new_state is <constant>FALSE</constant>) the first extension
428 adg_ldim_switch_extension1(AdgLDim
*ldim
, gboolean new_state
)
430 g_return_if_fail(ADG_IS_LDIM(ldim
));
431 g_return_if_fail(adg_is_boolean_value(new_state
));
432 g_object_set(ldim
, "has-extension1", new_state
, NULL
);
436 * adg_ldim_has_extension1:
437 * @ldim: an #AdgLDim entity
439 * Checks if @ldim should render also the first extension line.
441 * Returns: <constant>TRUE</constant> on first extension line presents, <constant>FALSE</constant> otherwise.
446 adg_ldim_has_extension1(AdgLDim
*ldim
)
448 AdgLDimPrivate
*data
;
450 g_return_val_if_fail(ADG_IS_LDIM(ldim
), FALSE
);
452 data
= adg_ldim_get_instance_private(ldim
);
453 return data
->has_extension1
;
457 * adg_ldim_switch_extension2:
458 * @ldim: an #AdgLDim entity
459 * @new_state: the new new_state
461 * Shows (if @new_state is <constant>TRUE</constant>) or hide (if
462 * @new_state is <constant>FALSE</constant>) the second extension
468 adg_ldim_switch_extension2(AdgLDim
*ldim
, gboolean new_state
)
470 g_return_if_fail(ADG_IS_LDIM(ldim
));
471 g_return_if_fail(adg_is_boolean_value(new_state
));
472 g_object_set(ldim
, "has-extension2", new_state
, NULL
);
476 * adg_ldim_has_extension2:
477 * @ldim: an #AdgLDim entity
479 * Checks if @ldim should render also the second extension line.
481 * Returns: <constant>TRUE</constant> on first extension line presents, <constant>FALSE</constant> otherwise.
486 adg_ldim_has_extension2(AdgLDim
*ldim
)
488 AdgLDimPrivate
*data
;
490 g_return_val_if_fail(ADG_IS_LDIM(ldim
), FALSE
);
492 data
= adg_ldim_get_instance_private(ldim
);
493 return data
->has_extension2
;
498 _adg_global_changed(AdgEntity
*entity
)
500 AdgLDimPrivate
*data
= adg_ldim_get_instance_private((AdgLDim
*) entity
);
502 _adg_unset_trail((AdgLDim
*) entity
);
504 if (_ADG_OLD_ENTITY_CLASS
->global_changed
)
505 _ADG_OLD_ENTITY_CLASS
->global_changed(entity
);
508 adg_entity_global_changed((AdgEntity
*) data
->marker1
);
511 adg_entity_global_changed((AdgEntity
*) data
->marker2
);
515 _adg_local_changed(AdgEntity
*entity
)
517 _adg_unset_trail((AdgLDim
*) entity
);
519 if (_ADG_OLD_ENTITY_CLASS
->local_changed
)
520 _ADG_OLD_ENTITY_CLASS
->local_changed(entity
);
524 _adg_invalidate(AdgEntity
*entity
)
526 AdgLDim
*ldim
= (AdgLDim
*) entity
;
528 _adg_dispose_trail(ldim
);
529 _adg_dispose_markers(ldim
);
530 _adg_unset_trail(ldim
);
532 if (_ADG_OLD_ENTITY_CLASS
->invalidate
)
533 _ADG_OLD_ENTITY_CLASS
->invalidate(entity
);
537 _adg_arrange(AdgEntity
*entity
)
541 AdgLDimPrivate
*data
;
543 AdgDimStyle
*dim_style
;
544 gboolean outside
, detach
;
545 const cairo_matrix_t
*local
;
546 CpmlPair ref1
, ref2
, pos
, base1
, base2
;
549 if (_ADG_OLD_ENTITY_CLASS
->arrange
)
550 _ADG_OLD_ENTITY_CLASS
->arrange(entity
);
552 dim
= (AdgDim
*) entity
;
553 if (! adg_dim_compute_geometry(dim
))
556 ldim
= (AdgLDim
*) entity
;
557 data
= adg_ldim_get_instance_private(ldim
);
558 quote
= adg_dim_get_quote(dim
);
560 _adg_update_entities(ldim
);
562 /* Check for cached result */
563 if (data
->cairo
.path
.status
== CAIRO_STATUS_SUCCESS
) {
564 adg_entity_set_global_map((AdgEntity
*) quote
, &data
->quote
.global_map
);
568 _adg_choose_flags(ldim
, &outside
, &detach
);
570 dim_style
= adg_dim_get_dim_style(dim
);
571 local
= adg_entity_get_local_matrix(entity
);
573 cpml_pair_copy(&ref1
, (CpmlPair
*) adg_dim_get_ref1(dim
));
574 cpml_pair_copy(&ref2
, (CpmlPair
*) adg_dim_get_ref2(dim
));
575 cpml_pair_copy(&pos
, (CpmlPair
*) adg_dim_get_pos(dim
));
576 cpml_pair_copy(&base1
, &data
->geometry
.base1
);
577 cpml_pair_copy(&base2
, &data
->geometry
.base2
);
579 cpml_pair_transform(&ref1
, local
);
580 cpml_pair_transform(&ref2
, local
);
581 cpml_pair_transform(&pos
, local
);
582 cpml_pair_transform(&base1
, local
);
583 base1
.x
+= data
->shift
.base
.x
;
584 base1
.y
+= data
->shift
.base
.y
;
585 cpml_pair_transform(&base2
, local
);
586 base2
.x
+= data
->shift
.base
.x
;
587 base2
.y
+= data
->shift
.base
.y
;
589 pair
.x
= ref1
.x
+ data
->shift
.from
.x
;
590 pair
.y
= ref1
.y
+ data
->shift
.from
.y
;
591 cpml_pair_to_cairo(&pair
, &data
->cairo
.data
[13]);
593 cpml_pair_to_cairo(&base1
, &data
->cairo
.data
[1]);
595 pair
.x
= base1
.x
+ data
->shift
.to
.x
;
596 pair
.y
= base1
.y
+ data
->shift
.to
.y
;
597 cpml_pair_to_cairo(&pair
, &data
->cairo
.data
[15]);
599 pair
.x
= ref2
.x
+ data
->shift
.from
.x
;
600 pair
.y
= ref2
.y
+ data
->shift
.from
.y
;
601 cpml_pair_to_cairo(&pair
, &data
->cairo
.data
[17]);
603 cpml_pair_to_cairo(&base2
, &data
->cairo
.data
[3]);
605 pair
.x
= base2
.x
+ data
->shift
.to
.x
;
606 pair
.y
= base2
.y
+ data
->shift
.to
.y
;
607 cpml_pair_to_cairo(&pair
, &data
->cairo
.data
[19]);
609 /* Calculate the outside segments */
614 beyond
= adg_dim_style_get_beyond(dim_style
);
615 cpml_pair_from_cairo(&pair
, &data
->cairo
.data
[1]);
617 cpml_pair_from_cairo(&vector
, &data
->cairo
.data
[3]);
620 cpml_vector_set_length(&vector
, beyond
);
622 cpml_pair_from_cairo(&pair
, &data
->cairo
.data
[1]);
623 cpml_pair_to_cairo(&pair
, &data
->cairo
.data
[5]);
627 cpml_pair_to_cairo(&pair
, &data
->cairo
.data
[7]);
629 cpml_pair_from_cairo(&pair
, &data
->cairo
.data
[3]);
630 cpml_pair_to_cairo(&pair
, &data
->cairo
.data
[11]);
634 cpml_pair_to_cairo(&pair
, &data
->cairo
.data
[9]);
636 data
->cairo
.data
[2].header
.length
= 2;
638 data
->cairo
.data
[2].header
.length
= 10;
640 data
->cairo
.data
[10].header
.length
= 2;
642 _adg_update_quote(ldim
, &base1
, &base2
, &pos
, detach
, outside
,
643 adg_dim_style_get_quote_shift(dim_style
)->x
);
645 /* Play with header lengths to show or hide the extension lines */
646 if (data
->has_extension1
) {
647 data
->cairo
.data
[14].header
.length
= data
->has_extension2
? 2 : 6;
649 gint n
= ! outside
&& ! detach
? 2 : 10;
650 data
->cairo
.data
[14].header
.length
= 2;
651 data
->cairo
.data
[n
].header
.length
+= 4;
652 if (!data
->has_extension2
)
653 data
->cairo
.data
[n
].header
.length
+= 4;
656 data
->cairo
.path
.status
= CAIRO_STATUS_SUCCESS
;
658 /* Update the markers, if present */
659 if (data
->trail
!= NULL
) {
660 if (data
->marker1
!= NULL
)
661 adg_marker_set_segment(data
->marker1
, data
->trail
, outside
? 2 : 1);
662 if (data
->marker2
!= NULL
)
663 adg_marker_set_segment(data
->marker2
, data
->trail
, outside
? 3 : 1);
665 _adg_dispose_markers(ldim
);
668 _adg_update_extents(ldim
);
672 _adg_render(AdgEntity
*entity
, cairo_t
*cr
)
676 AdgLDimPrivate
*data
;
677 AdgDimStyle
*dim_style
;
679 const cairo_path_t
*cairo_path
;
681 dim
= (AdgDim
*) entity
;
682 if (! adg_dim_compute_geometry(dim
))
685 ldim
= (AdgLDim
*) entity
;
686 data
= adg_ldim_get_instance_private(ldim
);
687 dim_style
= adg_dim_get_dim_style(dim
);
689 adg_style_apply((AdgStyle
*) dim_style
, entity
, cr
);
690 adg_entity_render((AdgEntity
*) adg_dim_get_quote(dim
), cr
);
693 adg_entity_render((AdgEntity
*) data
->marker1
, cr
);
695 adg_entity_render((AdgEntity
*) data
->marker2
, cr
);
697 cairo_transform(cr
, adg_entity_get_global_matrix(entity
));
698 dress
= adg_dim_style_get_line_dress(dim_style
);
699 adg_entity_apply_dress(entity
, dress
, cr
);
701 cairo_path
= adg_trail_get_cairo_path(data
->trail
);
702 cairo_append_path(cr
, cairo_path
);
707 _adg_default_value(AdgDim
*dim
)
710 AdgLDimPrivate
*data
;
713 if (! adg_dim_compute_geometry(dim
))
714 return g_strdup("undef");
716 ldim
= (AdgLDim
*) dim
;
717 data
= adg_ldim_get_instance_private(ldim
);
718 value
= data
->geometry
.distance
;
720 return adg_dim_get_text(dim
, value
);
724 _adg_compute_geometry(AdgDim
*dim
)
727 AdgLDimPrivate
*data
;
728 AdgPoint
*ref1_point
, *ref2_point
, *pos_point
;
729 const CpmlPair
*ref1
, *ref2
, *pos
;
730 CpmlVector baseline
, extension
;
733 ref1_point
= adg_dim_get_ref1(dim
);
734 if (! adg_point_update(ref1_point
)) {
735 adg_dim_geometry_missing(dim
, "ref1");
739 ref2_point
= adg_dim_get_ref2(dim
);
740 if (! adg_point_update(ref2_point
)) {
741 adg_dim_geometry_missing(dim
, "ref2");
745 pos_point
= adg_dim_get_pos(dim
);
746 if (! adg_point_update(pos_point
)) {
747 adg_dim_geometry_missing(dim
, "pos");
751 ref1
= (CpmlPair
*) ref1_point
;
752 ref2
= (CpmlPair
*) ref2_point
;
753 if (cpml_pair_equal(ref1
, ref2
)) {
754 adg_dim_geometry_coincident(dim
, "ref1", "ref2", ref1
);
758 pos
= (CpmlPair
*) pos_point
;
759 ldim
= (AdgLDim
*) dim
;
760 data
= adg_ldim_get_instance_private(ldim
);
762 cpml_vector_from_angle(&extension
, data
->direction
);
763 cpml_pair_copy(&baseline
, &extension
);
764 cpml_vector_normal(&baseline
);
766 d
= extension
.y
* baseline
.x
-
767 extension
.x
* baseline
.y
;
768 g_return_val_if_fail(d
!= 0, FALSE
);
770 k
= ((pos
->y
- ref1
->y
) * baseline
.x
-
771 (pos
->x
- ref1
->x
) * baseline
.y
) / d
;
772 data
->geometry
.base1
.x
= ref1
->x
+ k
* extension
.x
;
773 data
->geometry
.base1
.y
= ref1
->y
+ k
* extension
.y
;
775 k
= ((pos
->y
- ref2
->y
) * baseline
.x
-
776 (pos
->x
- ref2
->x
) * baseline
.y
) / d
;
777 data
->geometry
.base2
.x
= ref2
->x
+ k
* extension
.x
;
778 data
->geometry
.base2
.y
= ref2
->y
+ k
* extension
.y
;
780 data
->geometry
.distance
= cpml_pair_distance(&data
->geometry
.base1
,
781 &data
->geometry
.base2
);
783 _adg_update_shift(ldim
);
788 _adg_update_shift(AdgLDim
*ldim
)
790 AdgLDimPrivate
*data
= adg_ldim_get_instance_private(ldim
);
791 AdgDimStyle
*dim_style
;
792 gdouble from_offset
, to_offset
;
793 gdouble baseline_spacing
, level
;
796 if (data
->shift
.is_arranged
)
799 dim_style
= adg_dim_get_dim_style((AdgDim
*) ldim
);
800 from_offset
= adg_dim_style_get_from_offset(dim_style
);
801 to_offset
= adg_dim_style_get_to_offset(dim_style
);
802 baseline_spacing
= adg_dim_style_get_baseline_spacing(dim_style
);
803 level
= adg_dim_get_level((AdgDim
*) ldim
);
805 cpml_vector_from_angle(&vector
, data
->direction
);
807 cpml_vector_set_length(&vector
, from_offset
);
808 cpml_pair_copy(&data
->shift
.from
, &vector
);
810 cpml_vector_set_length(&vector
, to_offset
);
811 cpml_pair_copy(&data
->shift
.to
, &vector
);
813 cpml_vector_set_length(&vector
, level
* baseline_spacing
);
814 cpml_pair_copy(&data
->shift
.base
, &vector
);
818 _adg_update_entities(AdgLDim
*ldim
)
820 AdgEntity
*entity
= (AdgEntity
*) ldim
;
821 AdgLDimPrivate
*data
= adg_ldim_get_instance_private(ldim
);
822 AdgDimStyle
*dim_style
= adg_dim_get_dim_style((AdgDim
*) ldim
);
824 if (data
->trail
== NULL
)
825 data
->trail
= adg_trail_new(_adg_trail_callback
, ldim
);
827 if (data
->marker1
== NULL
) {
828 data
->marker1
= adg_dim_style_marker1_new(dim_style
);
829 adg_entity_set_parent((AdgEntity
*) data
->marker1
, entity
);
832 if (data
->marker2
== NULL
) {
833 data
->marker2
= adg_dim_style_marker2_new(dim_style
);
834 adg_entity_set_parent((AdgEntity
*) data
->marker2
, entity
);
839 _adg_choose_flags(AdgLDim
*ldim
, gboolean
*to_outside
, gboolean
*to_detach
)
842 AdgThreeState outside
, detached
;
843 AdgLDimPrivate
*data
;
844 const cairo_matrix_t
*local
, *global
;
845 gdouble local_factor
, global_factor
;
846 gdouble available_space
, markers_space
, quote_space
;
848 dim
= (AdgDim
*) ldim
;
849 outside
= adg_dim_get_outside(dim
);
850 detached
= adg_dim_get_detached(dim
);
852 *to_outside
= outside
== ADG_THREE_STATE_ON
;
853 *to_detach
= detached
== ADG_THREE_STATE_ON
;
855 /* On explicit flags, no further investigation is required */
856 if (outside
!= ADG_THREE_STATE_UNKNOWN
&&
857 detached
!= ADG_THREE_STATE_UNKNOWN
)
860 data
= adg_ldim_get_instance_private(ldim
);
861 local
= adg_entity_get_local_matrix((AdgEntity
*) ldim
);
862 global
= adg_entity_get_global_matrix((AdgEntity
*) ldim
);
863 local_factor
= abs(local
->xx
+ local
->yy
) / 2;
864 global_factor
= abs(global
->xx
+ global
->yy
) / 2;
865 available_space
= data
->geometry
.distance
* local_factor
* global_factor
;
868 if (outside
!= ADG_THREE_STATE_ON
) {
869 if (data
->marker1
!= NULL
)
870 markers_space
+= adg_marker_get_size(data
->marker1
);
871 if (data
->marker2
!= NULL
)
872 markers_space
+= adg_marker_get_size(data
->marker2
);
874 markers_space
*= global_factor
;
877 if (detached
== ADG_THREE_STATE_ON
) {
878 /* Leave at least 0.25 markers_space between the markers */
879 quote_space
= markers_space
* 0.25;
881 AdgEntity
*quote
= (AdgEntity
*) adg_dim_get_quote(dim
);
882 adg_entity_arrange(quote
);
883 quote_space
= adg_entity_get_extents(quote
)->size
.x
;
886 if (outside
== ADG_THREE_STATE_UNKNOWN
&&
887 detached
== ADG_THREE_STATE_UNKNOWN
) {
888 /* Both flags need to be choosed */
889 if (quote_space
+ markers_space
< available_space
) {
892 } else if (quote_space
< available_space
) {
897 *to_outside
= markers_space
* 1.25 > available_space
;
899 } else if (outside
== ADG_THREE_STATE_UNKNOWN
) {
900 /* Only the outside flag may be guessed */
901 *to_outside
= quote_space
+ markers_space
> available_space
;
903 /* Only the detached flag may be guessed */
904 *to_detach
= quote_space
+ markers_space
> available_space
;
909 _adg_update_quote(AdgLDim
*ldim
, CpmlPair
*base1
, CpmlPair
*base2
, CpmlPair
*pos
,
910 gboolean detach
, gboolean outside
, gdouble gap
)
912 AdgLDimPrivate
*data
;
913 AdgEntity
*quote_entity
;
914 CpmlPair middle
, factor
, org
;
918 quote_entity
= (AdgEntity
*) adg_dim_get_quote((AdgDim
*) ldim
);
919 if (quote_entity
== NULL
)
922 data
= adg_ldim_get_instance_private(ldim
);
923 middle
.x
= (base1
->x
+ base2
->x
) / 2;
924 middle
.y
= (base1
->y
+ base2
->y
) / 2;
925 dir
.x
= base2
->x
- base1
->x
;
926 dir
.y
= base2
->y
- base1
->y
;
927 cpml_vector_set_length(&dir
, 1);
930 /* Detached quote: position the quote at "pos" */
931 CpmlPair tmp_pair
, quote_end
;
933 gdouble distance1
, distance2
, quote_size
;
935 cairo_path_data_t
*to_extend
;
937 /* Set "org" to the properly converted "pos" coordinates */
938 org
.x
= pos
->x
+ data
->shift
.base
.x
;
939 org
.y
= pos
->y
+ data
->shift
.base
.y
;
941 /* Check in which side of the base line the quote must be rendered.
942 * This is done by checking if the (pos..middle) vector is closer
943 * to the base line vector or to its inverse, that is if they are
944 * concordants or discordants. For this purpose, an algorithm
945 * based on squared distances is used. */
946 tmp_pair
.x
= org
.x
- middle
.x
;
947 tmp_pair
.y
= org
.y
- middle
.y
;
950 distance2
= cpml_pair_squared_distance(&dir
, &tmp_pair
);
951 distance1
= cpml_pair_squared_distance(&vector
, &tmp_pair
);
952 on_side1
= distance2
> distance1
;
954 /* Properly align the quote, depending on its side */
955 factor
.x
= on_side1
? 1 : 0;
959 /* Add a gap between the quote and the extension line */
960 org
.x
+= vector
.x
* gap
;
961 org
.y
+= vector
.y
* gap
;
963 /* Calculate the end point (on the base line) of the quote */
964 quote_size
= adg_entity_get_extents(quote_entity
)->size
.x
;
965 quote_end
.x
= org
.x
+ vector
.x
* quote_size
;
966 quote_end
.y
= org
.y
+ vector
.y
* quote_size
;
968 /* Extends the base line to include the "quote_end" pair,
969 * so a detached quote is properly underlined */
971 to_extend
= &data
->cairo
.data
[on_side1
? 7 : 9];
973 to_extend
= &data
->cairo
.data
[9];
974 cpml_pair_to_cairo(&middle
, &data
->cairo
.data
[9]);
975 cpml_pair_to_cairo(on_side1
? base1
: base2
, &data
->cairo
.data
[11]);
976 data
->cairo
.data
[2].header
.length
= 6;
979 /* Extend the base line only if needed */
980 cpml_pair_from_cairo(&tmp_pair
, to_extend
);
981 distance1
= cpml_pair_squared_distance("e_end
, &middle
);
982 distance2
= cpml_pair_squared_distance(&tmp_pair
, &middle
);
983 if (distance1
> distance2
)
984 cpml_pair_to_cairo("e_end
, to_extend
);
986 /* Center the quote in the middle of the base line */
988 cpml_pair_copy(&org
, &middle
);
992 adg_alignment_set_factor((AdgAlignment
*) quote_entity
, &factor
);
993 cairo_matrix_init(&map
, dir
.x
, dir
.y
, -dir
.y
, dir
.x
, org
.x
, org
.y
);
994 adg_entity_set_global_map(quote_entity
, &map
);
995 adg_entity_arrange(quote_entity
);
997 adg_matrix_copy(&data
->quote
.global_map
, &map
);
1001 _adg_update_extents(AdgLDim
*ldim
)
1003 AdgLDimPrivate
*data
= adg_ldim_get_instance_private(ldim
);
1004 AdgEntity
*quote
= (AdgEntity
*) adg_dim_get_quote((AdgDim
*) ldim
);
1005 CpmlExtents new_extents
;
1006 const CpmlExtents
*extents
;
1007 AdgEntity
*marker_entity
;
1009 new_extents
.is_defined
= FALSE
;
1011 /* The quote is always present (otherwise something bad happened) */
1012 extents
= adg_entity_get_extents(quote
);
1013 if (extents
!= NULL
)
1014 cpml_extents_add(&new_extents
, extents
);
1016 if (data
->trail
!= NULL
) {
1017 extents
= adg_trail_get_extents(data
->trail
);
1018 if (extents
!= NULL
)
1019 cpml_extents_add(&new_extents
, extents
);
1022 if (data
->marker1
!= NULL
) {
1023 marker_entity
= (AdgEntity
*) data
->marker1
;
1024 adg_entity_local_changed(marker_entity
);
1025 adg_entity_arrange(marker_entity
);
1026 extents
= adg_entity_get_extents(marker_entity
);
1027 if (extents
!= NULL
)
1028 cpml_extents_add(&new_extents
, extents
);
1031 if (data
->marker2
!= NULL
) {
1032 marker_entity
= (AdgEntity
*) data
->marker2
;
1033 adg_entity_local_changed(marker_entity
);
1034 adg_entity_arrange(marker_entity
);
1035 extents
= adg_entity_get_extents(marker_entity
);
1036 if (extents
!= NULL
)
1037 cpml_extents_add(&new_extents
, extents
);
1040 adg_entity_set_extents((AdgEntity
*) ldim
, &new_extents
);
1044 _adg_unset_trail(AdgLDim
*ldim
)
1046 AdgLDimPrivate
*data
= adg_ldim_get_instance_private(ldim
);
1048 if (data
->trail
!= NULL
)
1049 adg_model_clear((AdgModel
*) data
->trail
);
1051 data
->cairo
.path
.status
= CAIRO_STATUS_INVALID_PATH_DATA
;
1055 _adg_dispose_trail(AdgLDim
*ldim
)
1057 AdgLDimPrivate
*data
= adg_ldim_get_instance_private(ldim
);
1059 if (data
->trail
!= NULL
) {
1060 g_object_unref(data
->trail
);
1066 _adg_dispose_markers(AdgLDim
*ldim
)
1068 AdgLDimPrivate
*data
= adg_ldim_get_instance_private(ldim
);
1070 if (data
->marker1
!= NULL
) {
1071 g_object_unref(data
->marker1
);
1072 data
->marker1
= NULL
;
1075 if (data
->marker2
!= NULL
) {
1076 g_object_unref(data
->marker2
);
1077 data
->marker2
= NULL
;
1081 static cairo_path_t
*
1082 _adg_trail_callback(AdgTrail
*trail
, gpointer user_data
)
1084 AdgLDim
*ldim
= (AdgLDim
*) user_data
;
1085 AdgLDimPrivate
*data
= adg_ldim_get_instance_private(ldim
);
1086 return &data
->cairo
.path
;