1 /* ADG - Automatic Drawing Generation
2 * Copyright (C) 2007-2017 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(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 g_type_class_add_private(klass
, sizeof(AdgLDimPrivate
));
123 gobject_class
->dispose
= _adg_dispose
;
124 gobject_class
->get_property
= _adg_get_property
;
125 gobject_class
->set_property
= _adg_set_property
;
127 entity_class
->global_changed
= _adg_global_changed
;
128 entity_class
->local_changed
= _adg_local_changed
;
129 entity_class
->invalidate
= _adg_invalidate
;
130 entity_class
->arrange
= _adg_arrange
;
131 entity_class
->render
= _adg_render
;
133 dim_class
->default_value
= _adg_default_value
;
134 dim_class
->compute_geometry
= _adg_compute_geometry
;
136 param
= g_param_spec_double("direction",
138 P_("The inclination angle of the extension lines"),
139 -G_PI
, G_PI
, ADG_DIR_RIGHT
,
140 G_PARAM_READWRITE
| G_PARAM_CONSTRUCT
);
141 g_object_class_install_property(gobject_class
, PROP_DIRECTION
, param
);
143 param
= g_param_spec_boolean("has-extension1",
144 P_("Has First Extension Line flag"),
145 P_("Show (TRUE) or hide (FALSE) the first extension line"),
146 TRUE
, G_PARAM_READWRITE
);
147 g_object_class_install_property(gobject_class
, PROP_HAS_EXTENSION1
, param
);
149 param
= g_param_spec_boolean("has-extension2",
150 P_("Has Second Extension Line flag"),
151 P_("Show (TRUE) or hide (FALSE) the second extension line"),
152 TRUE
, G_PARAM_READWRITE
);
153 g_object_class_install_property(gobject_class
, PROP_HAS_EXTENSION2
, param
);
157 adg_ldim_init(AdgLDim
*ldim
)
159 AdgLDimPrivate
*data
;
160 cairo_path_data_t move_to
, line_to
;
162 data
= G_TYPE_INSTANCE_GET_PRIVATE(ldim
, ADG_TYPE_LDIM
, AdgLDimPrivate
);
163 move_to
.header
.type
= CPML_MOVE
;
164 move_to
.header
.length
= 2;
165 line_to
.header
.type
= CPML_LINE
;
166 line_to
.header
.length
= 2;
168 data
->direction
= ADG_DIR_RIGHT
;
169 data
->has_extension1
= TRUE
;
170 data
->has_extension2
= TRUE
;
172 data
->cairo
.path
.status
= CAIRO_STATUS_INVALID_PATH_DATA
;
173 data
->cairo
.path
.data
= data
->cairo
.data
;
174 data
->cairo
.path
.num_data
= G_N_ELEMENTS(data
->cairo
.data
);
175 data
->cairo
.path
.data
[0] = move_to
;
176 data
->cairo
.path
.data
[2] = line_to
;
177 data
->cairo
.path
.data
[4] = move_to
;
178 data
->cairo
.path
.data
[6] = line_to
;
179 data
->cairo
.path
.data
[8] = move_to
;
180 data
->cairo
.path
.data
[10] = line_to
;
181 data
->cairo
.path
.data
[12] = move_to
;
182 data
->cairo
.path
.data
[14] = line_to
;
183 data
->cairo
.path
.data
[16] = move_to
;
184 data
->cairo
.path
.data
[18] = line_to
;
187 data
->marker1
= NULL
;
188 data
->marker2
= NULL
;
194 _adg_dispose(GObject
*object
)
196 AdgLDim
*ldim
= (AdgLDim
*) object
;
198 _adg_dispose_trail(ldim
);
199 _adg_dispose_markers(ldim
);
201 if (_ADG_OLD_OBJECT_CLASS
->dispose
)
202 _ADG_OLD_OBJECT_CLASS
->dispose(object
);
206 _adg_get_property(GObject
*object
, guint prop_id
,
207 GValue
*value
, GParamSpec
*pspec
)
209 AdgLDimPrivate
*data
= ((AdgLDim
*) object
)->data
;
213 g_value_set_double(value
, data
->direction
);
215 case PROP_HAS_EXTENSION1
:
216 g_value_set_boolean(value
, data
->has_extension1
);
218 case PROP_HAS_EXTENSION2
:
219 g_value_set_boolean(value
, data
->has_extension2
);
222 G_OBJECT_WARN_INVALID_PROPERTY_ID(object
, prop_id
, pspec
);
228 _adg_set_property(GObject
*object
, guint prop_id
,
229 const GValue
*value
, GParamSpec
*pspec
)
232 AdgLDimPrivate
*data
;
234 ldim
= (AdgLDim
*) object
;
239 data
->direction
= cpml_angle(g_value_get_double(value
));
241 case PROP_HAS_EXTENSION1
:
242 data
->has_extension1
= g_value_get_boolean(value
);
244 case PROP_HAS_EXTENSION2
:
245 data
->has_extension2
= g_value_get_boolean(value
);
248 G_OBJECT_WARN_INVALID_PROPERTY_ID(object
, prop_id
, pspec
);
257 * Creates a new - undefined - linear dimension. You must, at least,
258 * define the start of the dimension in #AdgDim:ref1, the end in
259 * #AdgDim:ref2 and the position of the quote in #AdgDim:pos using
260 * any valid #AdgDim method. The director of the dimension (that is,
261 * if it is horizontal, vertical or oblique at a specific angle)
262 * should be specified with adg_ldim_set_direction().
264 * Returns: the newly created linear dimension entity
271 return g_object_new(ADG_TYPE_LDIM
, NULL
);
276 * @ref1: (allow-none): the first reference point
277 * @ref2: (allow-none): the second reference point
278 * @pos: (allow-none): the position reference
279 * @direction: angle where to extend the dimension
281 * Creates a new linear dimension, specifing all the needed properties in
284 * Returns: the newly created linear dimension entity
289 adg_ldim_new_full(const CpmlPair
*ref1
, const CpmlPair
*ref2
,
290 const CpmlPair
*pos
, gdouble direction
)
295 ldim
= adg_ldim_new();
296 dim
= (AdgDim
*) ldim
;
299 adg_dim_set_ref1_from_pair(dim
, ref1
);
302 adg_dim_set_ref2_from_pair(dim
, ref2
);
305 adg_dim_set_pos_from_pair(dim
, pos
);
307 adg_ldim_set_direction(ldim
, direction
);
312 * adg_ldim_new_full_explicit:
313 * @ref1_x: the x coordinate of the first reference point
314 * @ref1_y: the y coordinate of the first reference point
315 * @ref2_x: the x coordinate of the second reference point
316 * @ref2_y: the y coordinate of the second reference point
317 * @pos_x: the x coordinate of the position reference
318 * @pos_y: the y coordinate of the position reference
319 * @direction: angle where to extend the dimension
321 * Wrappes adg_ldim_new_full() with explicit values.
323 * Returns: the newly created linear dimension entity
328 adg_ldim_new_full_explicit(gdouble ref1_x
, gdouble ref1_y
,
329 gdouble ref2_x
, gdouble ref2_y
,
330 gdouble pos_x
, gdouble pos_y
, gdouble direction
)
343 return adg_ldim_new_full(&ref1
, &ref2
, &pos
, direction
);
347 * adg_ldim_new_full_from_model:
348 * @model: (transfer none): the model from which the named pairs are taken
349 * @ref1: (allow-none): the first reference point
350 * @ref2: (allow-none): the second reference point
351 * @pos: (allow-none): the position reference
352 * @direction: angle where to extend the dimension
354 * Creates a new linear dimension, specifing all the needed properties in
355 * one shot and using named pairs from @model.
357 * Returns: the newly created linear dimension entity
362 adg_ldim_new_full_from_model(AdgModel
*model
,
363 const gchar
*ref1
, const gchar
*ref2
,
364 const gchar
*pos
, gdouble direction
)
369 g_return_val_if_fail(model
!= NULL
, NULL
);
371 ldim
= adg_ldim_new();
372 dim
= (AdgDim
*) ldim
;
375 adg_dim_set_ref1_from_model(dim
, model
, ref1
);
378 adg_dim_set_ref2_from_model(dim
, model
, ref2
);
381 adg_dim_set_pos_from_model(dim
, model
, pos
);
383 adg_ldim_set_direction(ldim
, direction
);
384 return (AdgLDim
*) dim
;
388 * adg_ldim_set_direction:
389 * @ldim: an #AdgLDim entity
390 * @direction: an angle value, in radians
392 * Sets the direction angle where to extend @ldim.
393 * @direction is normalized by cpml_angle() before being used.
398 adg_ldim_set_direction(AdgLDim
*ldim
, gdouble direction
)
400 g_return_if_fail(ADG_IS_LDIM(ldim
));
401 g_object_set(ldim
, "direction", direction
, NULL
);
405 * adg_ldim_get_direction:
406 * @ldim: an #AdgLDim entity
408 * Gets the direction where @ldim will extend.
410 * Returns: the direction angle in radians
415 adg_ldim_get_direction(AdgLDim
*ldim
)
417 AdgLDimPrivate
*data
;
419 g_return_val_if_fail(ADG_IS_LDIM(ldim
), 0);
423 return data
->direction
;
427 * adg_ldim_switch_extension1:
428 * @ldim: an #AdgLDim entity
429 * @new_state: the new state
431 * Shows (if @new_state is <constant>TRUE</constant>) or hide (if
432 * @new_state is <constant>FALSE</constant>) the first extension
438 adg_ldim_switch_extension1(AdgLDim
*ldim
, gboolean new_state
)
440 g_return_if_fail(ADG_IS_LDIM(ldim
));
441 g_return_if_fail(adg_is_boolean_value(new_state
));
442 g_object_set(ldim
, "has-extension1", new_state
, NULL
);
446 * adg_ldim_has_extension1:
447 * @ldim: an #AdgLDim entity
449 * Checks if @ldim should render also the first extension line.
451 * Returns: <constant>TRUE</constant> on first extension line presents, <constant>FALSE</constant> otherwise.
456 adg_ldim_has_extension1(AdgLDim
*ldim
)
458 AdgLDimPrivate
*data
;
460 g_return_val_if_fail(ADG_IS_LDIM(ldim
), FALSE
);
464 return data
->has_extension1
;
468 * adg_ldim_switch_extension2:
469 * @ldim: an #AdgLDim entity
470 * @new_state: the new new_state
472 * Shows (if @new_state is <constant>TRUE</constant>) or hide (if
473 * @new_state is <constant>FALSE</constant>) the second extension
479 adg_ldim_switch_extension2(AdgLDim
*ldim
, gboolean new_state
)
481 g_return_if_fail(ADG_IS_LDIM(ldim
));
482 g_return_if_fail(adg_is_boolean_value(new_state
));
483 g_object_set(ldim
, "has-extension2", new_state
, NULL
);
487 * adg_ldim_has_extension2:
488 * @ldim: an #AdgLDim entity
490 * Checks if @ldim should render also the second extension line.
492 * Returns: <constant>TRUE</constant> on first extension line presents, <constant>FALSE</constant> otherwise.
497 adg_ldim_has_extension2(AdgLDim
*ldim
)
499 AdgLDimPrivate
*data
;
501 g_return_val_if_fail(ADG_IS_LDIM(ldim
), FALSE
);
505 return data
->has_extension2
;
510 _adg_global_changed(AdgEntity
*entity
)
512 AdgLDimPrivate
*data
= ((AdgLDim
*) entity
)->data
;
514 _adg_unset_trail((AdgLDim
*) entity
);
516 if (_ADG_OLD_ENTITY_CLASS
->global_changed
)
517 _ADG_OLD_ENTITY_CLASS
->global_changed(entity
);
520 adg_entity_global_changed((AdgEntity
*) data
->marker1
);
523 adg_entity_global_changed((AdgEntity
*) data
->marker2
);
527 _adg_local_changed(AdgEntity
*entity
)
529 _adg_unset_trail((AdgLDim
*) entity
);
531 if (_ADG_OLD_ENTITY_CLASS
->local_changed
)
532 _ADG_OLD_ENTITY_CLASS
->local_changed(entity
);
536 _adg_invalidate(AdgEntity
*entity
)
538 AdgLDim
*ldim
= (AdgLDim
*) entity
;
540 _adg_dispose_trail(ldim
);
541 _adg_dispose_markers(ldim
);
542 _adg_unset_trail(ldim
);
544 if (_ADG_OLD_ENTITY_CLASS
->invalidate
)
545 _ADG_OLD_ENTITY_CLASS
->invalidate(entity
);
549 _adg_arrange(AdgEntity
*entity
)
553 AdgLDimPrivate
*data
;
555 AdgDimStyle
*dim_style
;
556 gboolean outside
, detach
;
557 const cairo_matrix_t
*local
;
558 CpmlPair ref1
, ref2
, pos
, base1
, base2
;
561 if (_ADG_OLD_ENTITY_CLASS
->arrange
)
562 _ADG_OLD_ENTITY_CLASS
->arrange(entity
);
564 dim
= (AdgDim
*) entity
;
565 if (! adg_dim_compute_geometry(dim
))
568 ldim
= (AdgLDim
*) entity
;
570 quote
= adg_dim_get_quote(dim
);
572 _adg_update_entities(ldim
);
574 /* Check for cached result */
575 if (data
->cairo
.path
.status
== CAIRO_STATUS_SUCCESS
) {
576 adg_entity_set_global_map((AdgEntity
*) quote
, &data
->quote
.global_map
);
580 _adg_choose_flags(ldim
, &outside
, &detach
);
582 dim_style
= _ADG_GET_DIM_STYLE(dim
);
583 local
= adg_entity_get_local_matrix(entity
);
585 cpml_pair_copy(&ref1
, (CpmlPair
*) adg_dim_get_ref1(dim
));
586 cpml_pair_copy(&ref2
, (CpmlPair
*) adg_dim_get_ref2(dim
));
587 cpml_pair_copy(&pos
, (CpmlPair
*) adg_dim_get_pos(dim
));
588 cpml_pair_copy(&base1
, &data
->geometry
.base1
);
589 cpml_pair_copy(&base2
, &data
->geometry
.base2
);
591 cpml_pair_transform(&ref1
, local
);
592 cpml_pair_transform(&ref2
, local
);
593 cpml_pair_transform(&pos
, local
);
594 cpml_pair_transform(&base1
, local
);
595 base1
.x
+= data
->shift
.base
.x
;
596 base1
.y
+= data
->shift
.base
.y
;
597 cpml_pair_transform(&base2
, local
);
598 base2
.x
+= data
->shift
.base
.x
;
599 base2
.y
+= data
->shift
.base
.y
;
601 pair
.x
= ref1
.x
+ data
->shift
.from
.x
;
602 pair
.y
= ref1
.y
+ data
->shift
.from
.y
;
603 cpml_pair_to_cairo(&pair
, &data
->cairo
.data
[13]);
605 cpml_pair_to_cairo(&base1
, &data
->cairo
.data
[1]);
607 pair
.x
= base1
.x
+ data
->shift
.to
.x
;
608 pair
.y
= base1
.y
+ data
->shift
.to
.y
;
609 cpml_pair_to_cairo(&pair
, &data
->cairo
.data
[15]);
611 pair
.x
= ref2
.x
+ data
->shift
.from
.x
;
612 pair
.y
= ref2
.y
+ data
->shift
.from
.y
;
613 cpml_pair_to_cairo(&pair
, &data
->cairo
.data
[17]);
615 cpml_pair_to_cairo(&base2
, &data
->cairo
.data
[3]);
617 pair
.x
= base2
.x
+ data
->shift
.to
.x
;
618 pair
.y
= base2
.y
+ data
->shift
.to
.y
;
619 cpml_pair_to_cairo(&pair
, &data
->cairo
.data
[19]);
621 /* Calculate the outside segments */
626 beyond
= adg_dim_style_get_beyond(dim_style
);
627 cpml_pair_from_cairo(&pair
, &data
->cairo
.data
[1]);
629 cpml_pair_from_cairo(&vector
, &data
->cairo
.data
[3]);
632 cpml_vector_set_length(&vector
, beyond
);
634 cpml_pair_from_cairo(&pair
, &data
->cairo
.data
[1]);
635 cpml_pair_to_cairo(&pair
, &data
->cairo
.data
[5]);
639 cpml_pair_to_cairo(&pair
, &data
->cairo
.data
[7]);
641 cpml_pair_from_cairo(&pair
, &data
->cairo
.data
[3]);
642 cpml_pair_to_cairo(&pair
, &data
->cairo
.data
[11]);
646 cpml_pair_to_cairo(&pair
, &data
->cairo
.data
[9]);
648 data
->cairo
.data
[2].header
.length
= 2;
650 data
->cairo
.data
[2].header
.length
= 10;
652 data
->cairo
.data
[10].header
.length
= 2;
654 _adg_update_quote(ldim
, &base1
, &base2
, &pos
, detach
, outside
,
655 adg_dim_style_get_quote_shift(dim_style
)->x
);
657 /* Play with header lengths to show or hide the extension lines */
658 if (data
->has_extension1
) {
659 data
->cairo
.data
[14].header
.length
= data
->has_extension2
? 2 : 6;
661 gint n
= ! outside
&& ! detach
? 2 : 10;
662 data
->cairo
.data
[14].header
.length
= 2;
663 data
->cairo
.data
[n
].header
.length
+= 4;
664 if (!data
->has_extension2
)
665 data
->cairo
.data
[n
].header
.length
+= 4;
668 data
->cairo
.path
.status
= CAIRO_STATUS_SUCCESS
;
670 /* Update the markers, if present */
671 if (data
->trail
!= NULL
) {
672 if (data
->marker1
!= NULL
)
673 adg_marker_set_segment(data
->marker1
, data
->trail
, outside
? 2 : 1);
674 if (data
->marker2
!= NULL
)
675 adg_marker_set_segment(data
->marker2
, data
->trail
, outside
? 3 : 1);
677 _adg_dispose_markers(ldim
);
680 _adg_update_extents(ldim
);
684 _adg_render(AdgEntity
*entity
, cairo_t
*cr
)
688 AdgLDimPrivate
*data
;
689 AdgDimStyle
*dim_style
;
691 const cairo_path_t
*cairo_path
;
693 dim
= (AdgDim
*) entity
;
694 if (! adg_dim_compute_geometry(dim
))
697 ldim
= (AdgLDim
*) entity
;
699 dim_style
= _ADG_GET_DIM_STYLE(dim
);
701 adg_style_apply((AdgStyle
*) dim_style
, entity
, cr
);
702 adg_entity_render((AdgEntity
*) adg_dim_get_quote(dim
), cr
);
705 adg_entity_render((AdgEntity
*) data
->marker1
, cr
);
707 adg_entity_render((AdgEntity
*) data
->marker2
, cr
);
709 cairo_transform(cr
, adg_entity_get_global_matrix(entity
));
710 dress
= adg_dim_style_get_line_dress(dim_style
);
711 adg_entity_apply_dress(entity
, dress
, cr
);
713 cairo_path
= adg_trail_get_cairo_path(data
->trail
);
714 cairo_append_path(cr
, cairo_path
);
719 _adg_default_value(AdgDim
*dim
)
722 AdgLDimPrivate
*data
;
725 if (! adg_dim_compute_geometry(dim
))
726 return g_strdup("undef");
728 ldim
= (AdgLDim
*) dim
;
730 value
= data
->geometry
.distance
;
732 return adg_dim_get_text(dim
, value
);
736 _adg_compute_geometry(AdgDim
*dim
)
739 AdgLDimPrivate
*data
;
740 AdgPoint
*ref1_point
, *ref2_point
, *pos_point
;
741 const CpmlPair
*ref1
, *ref2
, *pos
;
742 CpmlVector baseline
, extension
;
745 ref1_point
= adg_dim_get_ref1(dim
);
746 if (! adg_point_update(ref1_point
)) {
747 adg_dim_geometry_missing(dim
, "ref1");
751 ref2_point
= adg_dim_get_ref2(dim
);
752 if (! adg_point_update(ref2_point
)) {
753 adg_dim_geometry_missing(dim
, "ref2");
757 pos_point
= adg_dim_get_pos(dim
);
758 if (! adg_point_update(pos_point
)) {
759 adg_dim_geometry_missing(dim
, "pos");
763 ref1
= (CpmlPair
*) ref1_point
;
764 ref2
= (CpmlPair
*) ref2_point
;
765 if (cpml_pair_equal(ref1
, ref2
)) {
766 adg_dim_geometry_coincident(dim
, "ref1", "ref2", ref1
);
770 pos
= (CpmlPair
*) pos_point
;
771 ldim
= (AdgLDim
*) dim
;
774 cpml_vector_from_angle(&extension
, data
->direction
);
775 cpml_pair_copy(&baseline
, &extension
);
776 cpml_vector_normal(&baseline
);
778 d
= extension
.y
* baseline
.x
-
779 extension
.x
* baseline
.y
;
780 g_return_val_if_fail(d
!= 0, FALSE
);
782 k
= ((pos
->y
- ref1
->y
) * baseline
.x
-
783 (pos
->x
- ref1
->x
) * baseline
.y
) / d
;
784 data
->geometry
.base1
.x
= ref1
->x
+ k
* extension
.x
;
785 data
->geometry
.base1
.y
= ref1
->y
+ k
* extension
.y
;
787 k
= ((pos
->y
- ref2
->y
) * baseline
.x
-
788 (pos
->x
- ref2
->x
) * baseline
.y
) / d
;
789 data
->geometry
.base2
.x
= ref2
->x
+ k
* extension
.x
;
790 data
->geometry
.base2
.y
= ref2
->y
+ k
* extension
.y
;
792 data
->geometry
.distance
= cpml_pair_distance(&data
->geometry
.base1
,
793 &data
->geometry
.base2
);
795 _adg_update_shift(ldim
);
800 _adg_update_shift(AdgLDim
*ldim
)
802 AdgLDimPrivate
*data
;
803 AdgDimStyle
*dim_style
;
804 gdouble from_offset
, to_offset
;
805 gdouble baseline_spacing
, level
;
810 if (data
->shift
.is_arranged
)
813 dim_style
= _ADG_GET_DIM_STYLE(ldim
);
814 from_offset
= adg_dim_style_get_from_offset(dim_style
);
815 to_offset
= adg_dim_style_get_to_offset(dim_style
);
816 baseline_spacing
= adg_dim_style_get_baseline_spacing(dim_style
);
817 level
= adg_dim_get_level((AdgDim
*) ldim
);
819 cpml_vector_from_angle(&vector
, data
->direction
);
821 cpml_vector_set_length(&vector
, from_offset
);
822 cpml_pair_copy(&data
->shift
.from
, &vector
);
824 cpml_vector_set_length(&vector
, to_offset
);
825 cpml_pair_copy(&data
->shift
.to
, &vector
);
827 cpml_vector_set_length(&vector
, level
* baseline_spacing
);
828 cpml_pair_copy(&data
->shift
.base
, &vector
);
832 _adg_update_entities(AdgLDim
*ldim
)
835 AdgLDimPrivate
*data
;
836 AdgDimStyle
*dim_style
;
838 entity
= (AdgEntity
*) ldim
;
840 dim_style
= _ADG_GET_DIM_STYLE(ldim
);
842 if (data
->trail
== NULL
)
843 data
->trail
= adg_trail_new(_adg_trail_callback
, ldim
);
845 if (data
->marker1
== NULL
) {
846 data
->marker1
= adg_dim_style_marker1_new(dim_style
);
847 adg_entity_set_parent((AdgEntity
*) data
->marker1
, entity
);
850 if (data
->marker2
== NULL
) {
851 data
->marker2
= adg_dim_style_marker2_new(dim_style
);
852 adg_entity_set_parent((AdgEntity
*) data
->marker2
, entity
);
857 _adg_choose_flags(AdgLDim
*ldim
, gboolean
*to_outside
, gboolean
*to_detach
)
860 AdgThreeState outside
, detached
;
861 AdgLDimPrivate
*data
;
862 const cairo_matrix_t
*local
, *global
;
863 gdouble local_factor
, global_factor
;
864 gdouble available_space
, markers_space
, quote_space
;
866 dim
= (AdgDim
*) ldim
;
867 outside
= adg_dim_get_outside(dim
);
868 detached
= adg_dim_get_detached(dim
);
870 *to_outside
= outside
== ADG_THREE_STATE_ON
;
871 *to_detach
= detached
== ADG_THREE_STATE_ON
;
873 /* On explicit flags, no further investigation is required */
874 if (outside
!= ADG_THREE_STATE_UNKNOWN
&&
875 detached
!= ADG_THREE_STATE_UNKNOWN
)
879 local
= adg_entity_get_local_matrix((AdgEntity
*) ldim
);
880 global
= adg_entity_get_global_matrix((AdgEntity
*) ldim
);
881 local_factor
= abs(local
->xx
+ local
->yy
) / 2;
882 global_factor
= abs(global
->xx
+ global
->yy
) / 2;
883 available_space
= data
->geometry
.distance
* local_factor
* global_factor
;
886 if (outside
!= ADG_THREE_STATE_ON
) {
887 if (data
->marker1
!= NULL
)
888 markers_space
+= adg_marker_get_size(data
->marker1
);
889 if (data
->marker2
!= NULL
)
890 markers_space
+= adg_marker_get_size(data
->marker2
);
892 markers_space
*= global_factor
;
895 if (detached
== ADG_THREE_STATE_ON
) {
896 /* Leave at least 0.25 markers_space between the markers */
897 quote_space
= markers_space
* 0.25;
899 AdgEntity
*quote
= (AdgEntity
*) adg_dim_get_quote(dim
);
900 adg_entity_arrange(quote
);
901 quote_space
= adg_entity_get_extents(quote
)->size
.x
;
904 if (outside
== ADG_THREE_STATE_UNKNOWN
&&
905 detached
== ADG_THREE_STATE_UNKNOWN
) {
906 /* Both flags need to be choosed */
907 if (quote_space
+ markers_space
< available_space
) {
910 } else if (quote_space
< available_space
) {
915 *to_outside
= markers_space
* 1.25 > available_space
;
917 } else if (outside
== ADG_THREE_STATE_UNKNOWN
) {
918 /* Only the outside flag may be guessed */
919 *to_outside
= quote_space
+ markers_space
> available_space
;
921 /* Only the detached flag may be guessed */
922 *to_detach
= quote_space
+ markers_space
> available_space
;
927 _adg_update_quote(AdgLDim
*ldim
, CpmlPair
*base1
, CpmlPair
*base2
, CpmlPair
*pos
,
928 gboolean detach
, gboolean outside
, gdouble gap
)
930 AdgLDimPrivate
*data
;
931 AdgEntity
*quote_entity
;
932 CpmlPair middle
, factor
, org
;
936 quote_entity
= (AdgEntity
*) adg_dim_get_quote((AdgDim
*) ldim
);
937 if (quote_entity
== NULL
)
940 data
= (AdgLDimPrivate
*) ldim
->data
;
941 middle
.x
= (base1
->x
+ base2
->x
) / 2;
942 middle
.y
= (base1
->y
+ base2
->y
) / 2;
943 dir
.x
= base2
->x
- base1
->x
;
944 dir
.y
= base2
->y
- base1
->y
;
945 cpml_vector_set_length(&dir
, 1);
948 /* Detached quote: position the quote at "pos" */
949 CpmlPair tmp_pair
, quote_end
;
951 gdouble distance1
, distance2
, quote_size
;
953 cairo_path_data_t
*to_extend
;
955 /* Set "org" to the properly converted "pos" coordinates */
956 org
.x
= pos
->x
+ data
->shift
.base
.x
;
957 org
.y
= pos
->y
+ data
->shift
.base
.y
;
959 /* Check in which side of the base line the quote must be rendered.
960 * This is done by checking if the (pos..middle) vector is closer
961 * to the base line vector or to its inverse, that is if they are
962 * concordants or discordants. For this purpose, an algorithm
963 * based on squared distances is used. */
964 tmp_pair
.x
= org
.x
- middle
.x
;
965 tmp_pair
.y
= org
.y
- middle
.y
;
968 distance2
= cpml_pair_squared_distance(&dir
, &tmp_pair
);
969 distance1
= cpml_pair_squared_distance(&vector
, &tmp_pair
);
970 on_side1
= distance2
> distance1
;
972 /* Properly align the quote, depending on its side */
973 factor
.x
= on_side1
? 1 : 0;
977 /* Add a gap between the quote and the extension line */
978 org
.x
+= vector
.x
* gap
;
979 org
.y
+= vector
.y
* gap
;
981 /* Calculate the end point (on the base line) of the quote */
982 quote_size
= adg_entity_get_extents(quote_entity
)->size
.x
;
983 quote_end
.x
= org
.x
+ vector
.x
* quote_size
;
984 quote_end
.y
= org
.y
+ vector
.y
* quote_size
;
986 /* Extends the base line to include the "quote_end" pair,
987 * so a detached quote is properly underlined */
989 to_extend
= &data
->cairo
.data
[on_side1
? 7 : 9];
991 to_extend
= &data
->cairo
.data
[9];
992 cpml_pair_to_cairo(&middle
, &data
->cairo
.data
[9]);
993 cpml_pair_to_cairo(on_side1
? base1
: base2
, &data
->cairo
.data
[11]);
994 data
->cairo
.data
[2].header
.length
= 6;
997 /* Extend the base line only if needed */
998 cpml_pair_from_cairo(&tmp_pair
, to_extend
);
999 distance1
= cpml_pair_squared_distance("e_end
, &middle
);
1000 distance2
= cpml_pair_squared_distance(&tmp_pair
, &middle
);
1001 if (distance1
> distance2
)
1002 cpml_pair_to_cairo("e_end
, to_extend
);
1004 /* Center the quote in the middle of the base line */
1006 cpml_pair_copy(&org
, &middle
);
1010 adg_alignment_set_factor((AdgAlignment
*) quote_entity
, &factor
);
1011 cairo_matrix_init(&map
, dir
.x
, dir
.y
, -dir
.y
, dir
.x
, org
.x
, org
.y
);
1012 adg_entity_set_global_map(quote_entity
, &map
);
1013 adg_entity_arrange(quote_entity
);
1015 adg_matrix_copy(&data
->quote
.global_map
, &map
);
1019 _adg_update_extents(AdgLDim
*ldim
)
1021 AdgLDimPrivate
*data
;
1022 CpmlExtents new_extents
;
1023 const CpmlExtents
*extents
;
1025 AdgEntity
*marker_entity
;
1028 quote
= (AdgEntity
*) adg_dim_get_quote((AdgDim
*) ldim
);
1029 new_extents
.is_defined
= FALSE
;
1031 /* The quote is always present (otherwise something bad happened) */
1032 extents
= adg_entity_get_extents(quote
);
1033 if (extents
!= NULL
)
1034 cpml_extents_add(&new_extents
, extents
);
1036 if (data
->trail
!= NULL
) {
1037 extents
= adg_trail_get_extents(data
->trail
);
1038 if (extents
!= NULL
)
1039 cpml_extents_add(&new_extents
, extents
);
1042 if (data
->marker1
!= NULL
) {
1043 marker_entity
= (AdgEntity
*) data
->marker1
;
1044 adg_entity_local_changed(marker_entity
);
1045 adg_entity_arrange(marker_entity
);
1046 extents
= adg_entity_get_extents(marker_entity
);
1047 if (extents
!= NULL
)
1048 cpml_extents_add(&new_extents
, extents
);
1051 if (data
->marker2
!= NULL
) {
1052 marker_entity
= (AdgEntity
*) data
->marker2
;
1053 adg_entity_local_changed(marker_entity
);
1054 adg_entity_arrange(marker_entity
);
1055 extents
= adg_entity_get_extents(marker_entity
);
1056 if (extents
!= NULL
)
1057 cpml_extents_add(&new_extents
, extents
);
1060 adg_entity_set_extents((AdgEntity
*) ldim
, &new_extents
);
1064 _adg_unset_trail(AdgLDim
*ldim
)
1066 AdgLDimPrivate
*data
= ldim
->data
;
1068 if (data
->trail
!= NULL
)
1069 adg_model_clear((AdgModel
*) data
->trail
);
1071 data
->cairo
.path
.status
= CAIRO_STATUS_INVALID_PATH_DATA
;
1075 _adg_dispose_trail(AdgLDim
*ldim
)
1077 AdgLDimPrivate
*data
= ldim
->data
;
1079 if (data
->trail
!= NULL
) {
1080 g_object_unref(data
->trail
);
1086 _adg_dispose_markers(AdgLDim
*ldim
)
1088 AdgLDimPrivate
*data
= ldim
->data
;
1090 if (data
->marker1
!= NULL
) {
1091 g_object_unref(data
->marker1
);
1092 data
->marker1
= NULL
;
1095 if (data
->marker2
!= NULL
) {
1096 g_object_unref(data
->marker2
);
1097 data
->marker2
= NULL
;
1101 static cairo_path_t
*
1102 _adg_trail_callback(AdgTrail
*trail
, gpointer user_data
)
1105 AdgLDimPrivate
*data
;
1107 ldim
= (AdgLDim
*) user_data
;
1110 return &data
->cairo
.path
;