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: The drawing container
25 * The canvas is the toplevel entity of an ADG drawing. It can be
26 * bound to a GTK+ widget, such as #AdgGtkArea, or manually rendered
27 * to a custom surface.
29 * Tipically, the canvas contains the description and properties of
30 * the media used, such as such as size (if relevant), margins,
31 * border and paddings. This approach clearly follows the block model
32 * of the CSS specifications level 2.
34 * The paddings specify the distance between the entities contained
35 * by the canvas and the border. The margins specify the distance
36 * between the canvas border and the media extents.
38 * The canvas (hence the media) size can be explicitely specified
39 * by directly writing to the #AdgCanvas:size property or using any
40 * valid setter, such as adg_canvas_set_size(),
41 * adg_canvas_set_size_explicit() or the convenient
42 * adg_canvas_set_paper() GTK+ wrapper. You can also set explicitely
43 * only one dimension and let the other one be computed automatically.
44 * This is done by using the special value %0 that specifies a side
45 * must be autocalculated.
47 * By default either width and height must be autocalculated (are
48 * set to %0), so the arrange() phase on the canvas is performed.
49 * Margins and paddings are then added to the extents to get the
50 * border coordinates and the final bounding box.
52 * When the size is explicitely set, instead, the final bounding
53 * box is forcibly set to this value without taking the canvas
54 * extents into account. The margins are then subtracted to get
55 * the coordinates of the border. In this case, the paddings are
62 * All fields are private and should not be used directly.
63 * Use its public methods instead.
67 #include "adg-internal.h"
68 #include "adg-canvas.h"
69 #include "adg-canvas-private.h"
70 #include "adg-dress-builtins.h"
71 #include "adg-color-style.h"
73 #define _ADG_OLD_OBJECT_CLASS ((GObjectClass *) adg_canvas_parent_class)
74 #define _ADG_OLD_ENTITY_CLASS ((AdgEntityClass *) adg_canvas_parent_class)
77 G_DEFINE_TYPE(AdgCanvas
, adg_canvas
, ADG_TYPE_CONTAINER
);
82 PROP_BACKGROUND_DRESS
,
97 static void _adg_dispose (GObject
*object
);
98 static void _adg_get_property (GObject
*object
,
102 static void _adg_set_property (GObject
*object
,
106 static void _adg_global_changed (AdgEntity
*entity
);
107 static void _adg_local_changed (AdgEntity
*entity
);
108 static void _adg_invalidate (AdgEntity
*entity
);
109 static void _adg_arrange (AdgEntity
*entity
);
110 static void _adg_render (AdgEntity
*entity
,
115 adg_canvas_class_init(AdgCanvasClass
*klass
)
117 GObjectClass
*gobject_class
;
118 AdgEntityClass
*entity_class
;
121 gobject_class
= (GObjectClass
*) klass
;
122 entity_class
= (AdgEntityClass
*) klass
;
124 g_type_class_add_private(klass
, sizeof(AdgCanvasPrivate
));
126 gobject_class
->dispose
= _adg_dispose
;
127 gobject_class
->get_property
= _adg_get_property
;
128 gobject_class
->set_property
= _adg_set_property
;
130 entity_class
->global_changed
= _adg_global_changed
;
131 entity_class
->local_changed
= _adg_local_changed
;
132 entity_class
->invalidate
= _adg_invalidate
;
133 entity_class
->arrange
= _adg_arrange
;
134 entity_class
->render
= _adg_render
;
136 param
= g_param_spec_boxed("size",
138 P_("The size set on this canvas: use 0 to have an automatic dimension based on the canvas extents"),
141 g_object_class_install_property(gobject_class
, PROP_SIZE
, param
);
143 param
= adg_param_spec_dress("background-dress",
144 P_("Background Dress"),
145 P_("The color dress to use for the canvas background"),
146 ADG_DRESS_COLOR_BACKGROUND
,
148 g_object_class_install_property(gobject_class
, PROP_BACKGROUND_DRESS
, param
);
150 param
= adg_param_spec_dress("frame-dress",
152 P_("Line dress to use while drawing the frame around the canvas"),
153 ADG_DRESS_LINE_FRAME
,
155 g_object_class_install_property(gobject_class
, PROP_FRAME_DRESS
, param
);
157 param
= g_param_spec_object("title-block",
159 P_("The title block to assign to this canvas"),
160 ADG_TYPE_TITLE_BLOCK
,
162 g_object_class_install_property(gobject_class
, PROP_TITLE_BLOCK
, param
);
164 param
= g_param_spec_double("top-margin",
166 P_("The margin (in identity space) to leave above the frame"),
167 -G_MAXDOUBLE
, G_MAXDOUBLE
, 15,
169 g_object_class_install_property(gobject_class
, PROP_TOP_MARGIN
, param
);
171 param
= g_param_spec_double("right-margin",
173 P_("The margin (in identity space) to leave empty at the right of the frame"),
174 -G_MAXDOUBLE
, G_MAXDOUBLE
, 15,
176 g_object_class_install_property(gobject_class
, PROP_RIGHT_MARGIN
, param
);
178 param
= g_param_spec_double("bottom-margin",
180 P_("The margin (in identity space) to leave empty below the frame"),
181 -G_MAXDOUBLE
, G_MAXDOUBLE
, 15,
183 g_object_class_install_property(gobject_class
, PROP_BOTTOM_MARGIN
, param
);
185 param
= g_param_spec_double("left-margin",
187 P_("The margin (in identity space) to leave empty at the left of the frame"),
188 -G_MAXDOUBLE
, G_MAXDOUBLE
, 15,
190 g_object_class_install_property(gobject_class
, PROP_LEFT_MARGIN
, param
);
192 param
= g_param_spec_boolean("has-frame",
193 P_("Has Frame Flag"),
194 P_("If enabled, a frame using the frame dress will be drawn around the canvas extents, taking into account the margins"),
197 g_object_class_install_property(gobject_class
, PROP_HAS_FRAME
, param
);
199 param
= g_param_spec_double("top-padding",
201 P_("The padding (in identity space) to leave empty above between the drawing and the frame"),
202 -G_MAXDOUBLE
, G_MAXDOUBLE
, 15,
204 g_object_class_install_property(gobject_class
, PROP_TOP_PADDING
, param
);
206 param
= g_param_spec_double("right-padding",
208 P_("The padding (in identity space) to leave empty at the right between the drawing and the frame"),
209 -G_MAXDOUBLE
, G_MAXDOUBLE
, 15,
211 g_object_class_install_property(gobject_class
, PROP_RIGHT_PADDING
, param
);
213 param
= g_param_spec_double("bottom-padding",
214 P_("Bottom Padding"),
215 P_("The padding (in identity space) to leave empty below between the drawing and the frame"),
216 -G_MAXDOUBLE
, G_MAXDOUBLE
, 15,
218 g_object_class_install_property(gobject_class
, PROP_BOTTOM_PADDING
, param
);
220 param
= g_param_spec_double("left-padding",
222 P_("The padding (in identity space) to leave empty at the left between the drawing and the frame"),
223 -G_MAXDOUBLE
, G_MAXDOUBLE
, 15,
225 g_object_class_install_property(gobject_class
, PROP_LEFT_PADDING
, param
);
229 adg_canvas_init(AdgCanvas
*canvas
)
231 AdgCanvasPrivate
*data
= G_TYPE_INSTANCE_GET_PRIVATE(canvas
,
237 data
->background_dress
= ADG_DRESS_COLOR_BACKGROUND
;
238 data
->frame_dress
= ADG_DRESS_LINE_FRAME
;
239 data
->title_block
= NULL
;
240 data
->top_margin
= 15;
241 data
->right_margin
= 15;
242 data
->bottom_margin
= 15;
243 data
->left_margin
= 15;
244 data
->has_frame
= TRUE
;
245 data
->top_padding
= 15;
246 data
->right_padding
= 15;
247 data
->bottom_padding
= 15;
248 data
->left_padding
= 15;
254 _adg_dispose(GObject
*object
)
256 AdgCanvasPrivate
*data
= ((AdgCanvas
*) object
)->data
;
258 if (data
->title_block
) {
259 g_object_unref(data
->title_block
);
260 data
->title_block
= NULL
;
263 if (_ADG_OLD_OBJECT_CLASS
->dispose
)
264 _ADG_OLD_OBJECT_CLASS
->dispose(object
);
269 _adg_get_property(GObject
*object
, guint prop_id
,
270 GValue
*value
, GParamSpec
*pspec
)
272 AdgCanvasPrivate
*data
= ((AdgCanvas
*) object
)->data
;
276 g_value_set_boxed(value
, &data
->size
);
278 case PROP_BACKGROUND_DRESS
:
279 g_value_set_int(value
, data
->background_dress
);
281 case PROP_FRAME_DRESS
:
282 g_value_set_int(value
, data
->frame_dress
);
284 case PROP_TITLE_BLOCK
:
285 g_value_set_object(value
, data
->title_block
);
287 case PROP_TOP_MARGIN
:
288 g_value_set_double(value
, data
->top_margin
);
290 case PROP_RIGHT_MARGIN
:
291 g_value_set_double(value
, data
->right_margin
);
293 case PROP_BOTTOM_MARGIN
:
294 g_value_set_double(value
, data
->bottom_margin
);
296 case PROP_LEFT_MARGIN
:
297 g_value_set_double(value
, data
->left_margin
);
300 g_value_set_boolean(value
, data
->has_frame
);
302 case PROP_TOP_PADDING
:
303 g_value_set_double(value
, data
->top_padding
);
305 case PROP_RIGHT_PADDING
:
306 g_value_set_double(value
, data
->right_padding
);
308 case PROP_BOTTOM_PADDING
:
309 g_value_set_double(value
, data
->bottom_padding
);
311 case PROP_LEFT_PADDING
:
312 g_value_set_double(value
, data
->left_padding
);
315 G_OBJECT_WARN_INVALID_PROPERTY_ID(object
, prop_id
, pspec
);
321 _adg_set_property(GObject
*object
, guint prop_id
,
322 const GValue
*value
, GParamSpec
*pspec
)
325 AdgCanvasPrivate
*data
;
326 AdgTitleBlock
*title_block
;
328 canvas
= (AdgCanvas
*) object
;
333 adg_pair_copy(&data
->size
, g_value_get_boxed(value
));
335 case PROP_BACKGROUND_DRESS
:
336 data
->background_dress
= g_value_get_int(value
);
338 case PROP_FRAME_DRESS
:
339 data
->frame_dress
= g_value_get_int(value
);
341 case PROP_TITLE_BLOCK
:
342 title_block
= g_value_get_object(value
);
344 g_object_ref(title_block
);
345 adg_entity_set_parent((AdgEntity
*) title_block
,
346 (AdgEntity
*) canvas
);
348 if (data
->title_block
)
349 g_object_unref(data
->title_block
);
350 data
->title_block
= title_block
;
352 case PROP_TOP_MARGIN
:
353 data
->top_margin
= g_value_get_double(value
);
355 case PROP_RIGHT_MARGIN
:
356 data
->right_margin
= g_value_get_double(value
);
358 case PROP_BOTTOM_MARGIN
:
359 data
->bottom_margin
= g_value_get_double(value
);
361 case PROP_LEFT_MARGIN
:
362 data
->left_margin
= g_value_get_double(value
);
365 data
->has_frame
= g_value_get_boolean(value
);
367 case PROP_TOP_PADDING
:
368 data
->top_padding
= g_value_get_double(value
);
370 case PROP_RIGHT_PADDING
:
371 data
->right_padding
= g_value_get_double(value
);
373 case PROP_BOTTOM_PADDING
:
374 data
->bottom_padding
= g_value_get_double(value
);
376 case PROP_LEFT_PADDING
:
377 data
->left_padding
= g_value_get_double(value
);
380 G_OBJECT_WARN_INVALID_PROPERTY_ID(object
, prop_id
, pspec
);
389 * Creates a new empty canvas object.
391 * Returns: the canvas
396 return g_object_new(ADG_TYPE_CANVAS
, NULL
);
400 * adg_canvas_set_size:
401 * @canvas: an #AdgCanvas
402 * @size: the new size for the canvas
404 * Sets a specific size on @canvas. The x and/or y
405 * components of the returned #AdgPair could be %0, in which
406 * case the size returned by adg_entity_get_extents() on
407 * @canvas will be used instead.
410 adg_canvas_set_size(AdgCanvas
*canvas
, const AdgPair
*size
)
412 g_return_if_fail(ADG_IS_CANVAS(canvas
));
413 g_return_if_fail(size
!= NULL
);
415 g_object_set((GObject
*) canvas
, "size", size
, NULL
);
419 * adg_canvas_set_size_explicit:
420 * @canvas: an #AdgCanvas
421 * @x: the new width of the canvas or %0 to reset
422 * @y: the new height of the canvas or %0 to reset
424 * A convenient function to set the size of @canvas using
425 * explicit coordinates. Check adg_canvas_set_size() for
429 adg_canvas_set_size_explicit(AdgCanvas
*canvas
, gdouble x
, gdouble y
)
436 adg_canvas_set_size(canvas
, &size
);
440 * adg_canvas_get_size:
441 * @canvas: an #AdgCanvas
443 * Gets the specific size set on @canvas. The x and/or y
444 * components of the returned #AdgPair could be %0, in which
445 * case the size returned by adg_entity_get_extents() on
446 * @canvas will be used instead.
448 * Returns: the explicit size set on this canvas or %NULL on errors
451 adg_canvas_get_size(AdgCanvas
*canvas
)
453 AdgCanvasPrivate
*data
;
455 g_return_val_if_fail(ADG_IS_CANVAS(canvas
), NULL
);
462 * adg_canvas_set_background_dress:
463 * @canvas: an #AdgCanvas
464 * @dress: the new #AdgDress to use
466 * Sets a new background dress for rendering @canvas: the new
467 * dress must be a color dress.
470 adg_canvas_set_background_dress(AdgCanvas
*canvas
, AdgDress dress
)
472 g_return_if_fail(ADG_IS_CANVAS(canvas
));
473 g_object_set((GObject
*) canvas
, "background-dress", dress
, NULL
);
477 * adg_canvas_get_background_dress:
478 * @canvas: an #AdgCanvas
480 * Gets the background dress to be used in rendering @canvas.
482 * Returns: the current background dress
485 adg_canvas_get_background_dress(AdgCanvas
*canvas
)
487 AdgCanvasPrivate
*data
;
489 g_return_val_if_fail(ADG_IS_CANVAS(canvas
), ADG_DRESS_UNDEFINED
);
493 return data
->background_dress
;
497 * adg_canvas_set_frame_dress:
498 * @canvas: an #AdgCanvas
499 * @dress: the new #AdgDress to use
501 * Sets the #AdgCanvas:frame-dress property of @canvas to @dress:
502 * the new dress must be a line dress.
505 adg_canvas_set_frame_dress(AdgCanvas
*canvas
, AdgDress dress
)
507 g_return_if_fail(ADG_IS_CANVAS(canvas
));
508 g_object_set((GObject
*) canvas
, "frame-dress", dress
, NULL
);
512 * adg_canvas_get_frame_dress:
513 * @canvas: an #AdgCanvas
515 * Gets the frame dress to be used in rendering the border of @canvas.
517 * Returns: the current frame dress
520 adg_canvas_get_frame_dress(AdgCanvas
*canvas
)
522 AdgCanvasPrivate
*data
;
524 g_return_val_if_fail(ADG_IS_CANVAS(canvas
), ADG_DRESS_UNDEFINED
);
527 return data
->frame_dress
;
531 * adg_canvas_set_title_block:
532 * @canvas: an #AdgCanvas
533 * @title_block: a title block
535 * Sets the #AdgCanvas:title-block property of @canvas to @title_block.
537 * Although a title block entity could be added to @canvas in the usual
538 * way, that is using the adg_container_add() method, assigning a title
539 * block with adg_canvas_set_title_block() is somewhat different:
541 * - @title_block will be automatically attached to the bottom right
542 * corner of to the @canvas frame (this could be accomplished in the
543 * usual way too, by resetting the right and bottom paddings);
544 * - the @title_block boundary box is not taken into account while
545 * computing the extents of @canvas.
548 adg_canvas_set_title_block(AdgCanvas
*canvas
, AdgTitleBlock
*title_block
)
550 g_return_if_fail(ADG_IS_CANVAS(canvas
));
551 g_return_if_fail(title_block
== NULL
|| ADG_IS_TITLE_BLOCK(title_block
));
552 g_object_set((GObject
*) canvas
, "title-block", title_block
, NULL
);
556 * adg_canvas_get_title_block:
557 * @canvas: an #AdgCanvas
559 * Gets the #AdgTitleBlock object of @canvas: check
560 * adg_canvas_set_title_block() for details.
562 * Returns: the title block object or %NULL
565 adg_canvas_get_title_block(AdgCanvas
*canvas
)
567 AdgCanvasPrivate
*data
;
569 g_return_val_if_fail(ADG_IS_CANVAS(canvas
), NULL
);
572 return data
->title_block
;
576 * adg_canvas_set_top_margin:
577 * @canvas: an #AdgCanvas
578 * @value: the new margin, in identity space
580 * Changes the top margin of @canvas by setting #AdgCanvas:top-margin
581 * to @value. Negative values are allowed.
584 adg_canvas_set_top_margin(AdgCanvas
*canvas
, gdouble value
)
586 g_return_if_fail(ADG_IS_CANVAS(canvas
));
587 g_object_set((GObject
*) canvas
, "top-margin", value
, NULL
);
591 * adg_canvas_get_top_margin:
592 * @canvas: an #AdgCanvas
594 * Gets the top margin (in identity space) of @canvas.
596 * Returns: the requested margin or %0 on error
599 adg_canvas_get_top_margin(AdgCanvas
*canvas
)
601 AdgCanvasPrivate
*data
;
603 g_return_val_if_fail(ADG_IS_CANVAS(canvas
), 0.);
606 return data
->top_margin
;
610 * adg_canvas_set_right_margin:
611 * @canvas: an #AdgCanvas
612 * @value: the new margin, in identity space
614 * Changes the right margin of @canvas by setting #AdgCanvas:right-margin
615 * to @value. Negative values are allowed.
618 adg_canvas_set_right_margin(AdgCanvas
*canvas
, gdouble value
)
620 g_return_if_fail(ADG_IS_CANVAS(canvas
));
621 g_object_set((GObject
*) canvas
, "right-margin", value
, NULL
);
625 * adg_canvas_get_right_margin:
626 * @canvas: an #AdgCanvas
628 * Gets the right margin (in identity space) of @canvas.
630 * Returns: the requested margin or %0 on error
633 adg_canvas_get_right_margin(AdgCanvas
*canvas
)
635 AdgCanvasPrivate
*data
;
637 g_return_val_if_fail(ADG_IS_CANVAS(canvas
), 0.);
640 return data
->right_margin
;
645 * adg_canvas_set_bottom_margin:
646 * @canvas: an #AdgCanvas
647 * @value: the new margin, in identity space
649 * Changes the bottom margin of @canvas by setting #AdgCanvas:bottom-margin
650 * to @value. Negative values are allowed.
653 adg_canvas_set_bottom_margin(AdgCanvas
*canvas
, gdouble value
)
655 g_return_if_fail(ADG_IS_CANVAS(canvas
));
656 g_object_set((GObject
*) canvas
, "bottom-margin", value
, NULL
);
660 * adg_canvas_get_bottom_margin:
661 * @canvas: an #AdgCanvas
663 * Gets the bottom margin (in identity space) of @canvas.
665 * Returns: the requested margin or %0 on error
668 adg_canvas_get_bottom_margin(AdgCanvas
*canvas
)
670 AdgCanvasPrivate
*data
;
672 g_return_val_if_fail(ADG_IS_CANVAS(canvas
), 0.);
675 return data
->bottom_margin
;
679 * adg_canvas_set_left_margin:
680 * @canvas: an #AdgCanvas
681 * @value: the new margin, in identity space
683 * Changes the left margin of @canvas by setting #AdgCanvas:left-margin
684 * to @value. Negative values are allowed.
687 adg_canvas_set_left_margin(AdgCanvas
*canvas
, gdouble value
)
689 g_return_if_fail(ADG_IS_CANVAS(canvas
));
690 g_object_set((GObject
*) canvas
, "left-margin", value
, NULL
);
694 * adg_canvas_get_left_margin:
695 * @canvas: an #AdgCanvas
697 * Gets the left margin (in identity space) of @canvas.
699 * Returns: the requested margin or %0 on error
702 adg_canvas_get_left_margin(AdgCanvas
*canvas
)
704 AdgCanvasPrivate
*data
;
706 g_return_val_if_fail(ADG_IS_CANVAS(canvas
), 0.);
709 return data
->left_margin
;
713 * adg_canvas_set_margins:
714 * @canvas: an #AdgCanvas
715 * @top: top margin, in identity space
716 * @right: right margin, in identity space
717 * @bottom: bottom margin, in identity space
718 * @left: left margin, in identity space
720 * Convenient function to set all the margins at once.
723 adg_canvas_set_margins(AdgCanvas
*canvas
, gdouble top
, gdouble right
,
724 gdouble bottom
, gdouble left
)
726 g_return_if_fail(ADG_IS_CANVAS(canvas
));
727 g_object_set((GObject
*) canvas
,
729 "right-margin", right
,
730 "bottom-margin", bottom
,
736 * adg_canvas_switch_frame:
737 * @canvas: an #AdgCanvas
738 * @new_state: the new flag status
740 * Sets a new status on the #AdgCanvas:has-frame property: %TRUE
741 * means a border around the canvas extents (less the margins)
742 * should be rendered.
745 adg_canvas_switch_frame(AdgCanvas
*canvas
, gboolean new_state
)
747 g_return_if_fail(ADG_IS_CANVAS(canvas
));
748 g_object_set((GObject
*) canvas
, "has-frame", new_state
, NULL
);
752 * adg_canvas_has_frame:
753 * @canvas: an #AdgCanvas
755 * Gets the current status of the #AdgCanvas:has-frame property,
756 * that is whether a border around the canvas extents (less the
757 * margins) should be rendered (%TRUE) or not (%FALSE).
759 * Returns: the current status of the frame flag
762 adg_canvas_has_frame(AdgCanvas
*canvas
)
764 AdgCanvasPrivate
*data
;
766 g_return_val_if_fail(ADG_IS_CANVAS(canvas
), FALSE
);
769 return data
->has_frame
;
773 * adg_canvas_set_top_padding:
774 * @canvas: an #AdgCanvas
775 * @value: the new padding, in identity space
777 * Changes the top padding of @canvas by setting #AdgCanvas:top-padding
778 * to @value. Negative values are allowed.
781 adg_canvas_set_top_padding(AdgCanvas
*canvas
, gdouble value
)
783 g_return_if_fail(ADG_IS_CANVAS(canvas
));
784 g_object_set((GObject
*) canvas
, "top-padding", value
, NULL
);
788 * adg_canvas_get_top_padding:
789 * @canvas: an #AdgCanvas
791 * Gets the top padding (in identity space) of @canvas.
793 * Returns: the requested padding or %0 on error
796 adg_canvas_get_top_padding(AdgCanvas
*canvas
)
798 AdgCanvasPrivate
*data
;
800 g_return_val_if_fail(ADG_IS_CANVAS(canvas
), 0.);
803 return data
->top_padding
;
807 * adg_canvas_set_right_padding:
808 * @canvas: an #AdgCanvas
809 * @value: the new padding, in identity space
811 * Changes the right padding of @canvas by setting #AdgCanvas:right-padding
812 * to @value. Negative values are allowed.
815 adg_canvas_set_right_padding(AdgCanvas
*canvas
, gdouble value
)
817 g_return_if_fail(ADG_IS_CANVAS(canvas
));
818 g_object_set((GObject
*) canvas
, "right-padding", value
, NULL
);
822 * adg_canvas_get_right_padding:
823 * @canvas: an #AdgCanvas
825 * Gets the right padding (in identity space) of @canvas.
827 * Returns: the requested padding or %0 on error
830 adg_canvas_get_right_padding(AdgCanvas
*canvas
)
832 AdgCanvasPrivate
*data
;
834 g_return_val_if_fail(ADG_IS_CANVAS(canvas
), 0.);
837 return data
->right_padding
;
842 * adg_canvas_set_bottom_padding:
843 * @canvas: an #AdgCanvas
844 * @value: the new padding, in identity space
846 * Changes the bottom padding of @canvas by setting #AdgCanvas:bottom-padding
847 * to @value. Negative values are allowed.
850 adg_canvas_set_bottom_padding(AdgCanvas
*canvas
, gdouble value
)
852 g_return_if_fail(ADG_IS_CANVAS(canvas
));
853 g_object_set((GObject
*) canvas
, "bottom-padding", value
, NULL
);
857 * adg_canvas_get_bottom_padding:
858 * @canvas: an #AdgCanvas
860 * Gets the bottom padding (in identity space) of @canvas.
862 * Returns: the requested padding or %0 on error
865 adg_canvas_get_bottom_padding(AdgCanvas
*canvas
)
867 AdgCanvasPrivate
*data
;
869 g_return_val_if_fail(ADG_IS_CANVAS(canvas
), 0.);
872 return data
->bottom_padding
;
876 * adg_canvas_set_left_padding:
877 * @canvas: an #AdgCanvas
878 * @value: the new padding, in identity space
880 * Changes the left padding of @canvas by setting #AdgCanvas:left-padding
881 * to @value. Negative values are allowed.
884 adg_canvas_set_left_padding(AdgCanvas
*canvas
, gdouble value
)
886 g_return_if_fail(ADG_IS_CANVAS(canvas
));
887 g_object_set((GObject
*) canvas
, "left-padding", value
, NULL
);
891 * adg_canvas_get_left_padding:
892 * @canvas: an #AdgCanvas
894 * Gets the left padding (in identity space) of @canvas.
896 * Returns: the requested padding or %0 on error
899 adg_canvas_get_left_padding(AdgCanvas
*canvas
)
901 AdgCanvasPrivate
*data
;
903 g_return_val_if_fail(ADG_IS_CANVAS(canvas
), 0.);
906 return data
->left_padding
;
910 * adg_canvas_set_paddings:
911 * @canvas: an #AdgCanvas
912 * @top: top padding, in identity space
913 * @right: right padding, in identity space
914 * @bottom: bottom padding, in identity space
915 * @left: left padding, in identity space
917 * Convenient function to set all the paddings at once.
920 adg_canvas_set_paddings(AdgCanvas
*canvas
, gdouble top
, gdouble right
,
921 gdouble bottom
, gdouble left
)
923 g_return_if_fail(ADG_IS_CANVAS(canvas
));
924 g_object_set((GObject
*) canvas
,
926 "right-padding", right
,
927 "bottom-padding", bottom
,
928 "left-padding", left
,
934 _adg_global_changed(AdgEntity
*entity
)
936 AdgCanvasPrivate
*data
= ((AdgCanvas
*) entity
)->data
;
938 if (_ADG_OLD_ENTITY_CLASS
->global_changed
)
939 _ADG_OLD_ENTITY_CLASS
->global_changed(entity
);
941 if (data
->title_block
)
942 adg_entity_global_changed((AdgEntity
*) data
->title_block
);
946 _adg_local_changed(AdgEntity
*entity
)
948 AdgCanvasPrivate
*data
= ((AdgCanvas
*) entity
)->data
;
950 if (_ADG_OLD_ENTITY_CLASS
->local_changed
)
951 _ADG_OLD_ENTITY_CLASS
->local_changed(entity
);
953 if (data
->title_block
)
954 adg_entity_local_changed((AdgEntity
*) data
->title_block
);
958 _adg_invalidate(AdgEntity
*entity
)
960 AdgCanvasPrivate
*data
= ((AdgCanvas
*) entity
)->data
;
962 if (_ADG_OLD_ENTITY_CLASS
->invalidate
)
963 _ADG_OLD_ENTITY_CLASS
->invalidate(entity
);
965 if (data
->title_block
)
966 adg_entity_invalidate((AdgEntity
*) data
->title_block
);
970 _adg_arrange(AdgEntity
*entity
)
972 AdgCanvasPrivate
*data
;
975 if (_ADG_OLD_ENTITY_CLASS
->arrange
)
976 _ADG_OLD_ENTITY_CLASS
->arrange(entity
);
978 cpml_extents_copy(&extents
, adg_entity_get_extents(entity
));
980 /* The extents should be defined, otherwise there is no drawing */
981 g_return_if_fail(extents
.is_defined
);
983 data
= ((AdgCanvas
*) entity
)->data
;
985 if (data
->size
.x
> 0 || data
->size
.y
> 0) {
986 const AdgMatrix
*global
= adg_entity_get_global_matrix(entity
);
989 paper
.org
.x
= data
->left_margin
;
990 paper
.org
.y
= data
->top_margin
;
991 paper
.size
.x
= data
->size
.x
;
992 paper
.size
.y
= data
->size
.y
;
994 cairo_matrix_transform_point(global
, &paper
.org
.x
, &paper
.org
.y
);
995 cairo_matrix_transform_distance(global
, &paper
.size
.x
, &paper
.size
.y
);
997 if (data
->size
.x
> 0) {
998 extents
.org
.x
= paper
.org
.x
;
999 extents
.size
.x
= paper
.size
.x
;
1001 if (data
->size
.y
> 0) {
1002 extents
.org
.y
= paper
.org
.y
;
1003 extents
.size
.y
= paper
.size
.y
;
1007 if (data
->size
.x
== 0) {
1008 extents
.org
.x
-= data
->left_padding
;
1009 extents
.size
.x
+= data
->left_padding
+ data
->right_padding
;
1011 if (data
->size
.y
== 0) {
1012 extents
.org
.y
-= data
->top_padding
;
1013 extents
.size
.y
+= data
->top_padding
+ data
->bottom_padding
;
1017 extents
.org
.x
-= data
->left_margin
;
1018 extents
.org
.y
-= data
->top_margin
;
1019 extents
.size
.x
+= data
->left_margin
+ data
->right_margin
;
1020 extents
.size
.y
+= data
->top_margin
+ data
->bottom_margin
;
1022 /* Impose the new extents */
1023 adg_entity_set_extents(entity
, &extents
);
1025 if (data
->title_block
) {
1026 AdgEntity
*title_block_entity
;
1027 const CpmlExtents
*title_block_extents
;
1030 title_block_entity
= (AdgEntity
*) data
->title_block
;
1031 adg_entity_arrange(title_block_entity
);
1032 title_block_extents
= adg_entity_get_extents(title_block_entity
);
1034 shift
.x
= extents
.org
.x
+ extents
.size
.x
- title_block_extents
->org
.x
1035 - title_block_extents
->size
.x
- data
->right_margin
;
1036 shift
.y
= extents
.org
.y
+ extents
.size
.y
- title_block_extents
->org
.y
1037 - title_block_extents
->size
.y
- data
->bottom_margin
;
1039 /* The following block could be optimized by skipping tiny shift,
1040 * usually left by rounding errors */
1041 if (shift
.x
!= 0 || shift
.y
!= 0) {
1042 AdgMatrix unglobal
, map
;
1043 adg_matrix_copy(&unglobal
, adg_entity_get_global_matrix(entity
));
1044 cairo_matrix_invert(&unglobal
);
1046 cairo_matrix_transform_distance(&unglobal
, &shift
.x
, &shift
.y
);
1047 cairo_matrix_init_translate(&map
, shift
.x
, shift
.y
);
1048 adg_entity_transform_global_map(title_block_entity
, &map
,
1049 ADG_TRANSFORM_AFTER
);
1051 adg_entity_global_changed(title_block_entity
);
1052 adg_entity_arrange(title_block_entity
);
1058 _adg_render(AdgEntity
*entity
, cairo_t
*cr
)
1060 AdgCanvasPrivate
*data
;
1061 const CpmlExtents
*extents
;
1063 data
= ((AdgCanvas
*) entity
)->data
;
1064 extents
= adg_entity_get_extents(entity
);
1068 /* Background fill */
1069 cairo_rectangle(cr
, extents
->org
.x
, extents
->org
.y
,
1070 extents
->size
.x
, extents
->size
.y
);
1071 adg_entity_apply_dress(entity
, data
->background_dress
, cr
);
1075 if (data
->has_frame
) {
1077 cpml_extents_copy(&frame
, extents
);
1079 frame
.org
.x
+= data
->left_margin
;
1080 frame
.org
.y
+= data
->top_margin
;
1081 frame
.size
.x
-= data
->left_margin
+ data
->right_margin
;
1082 frame
.size
.y
-= data
->top_margin
+ data
->bottom_margin
;
1084 cairo_rectangle(cr
, frame
.org
.x
, frame
.org
.y
,
1085 frame
.size
.x
, frame
.size
.y
);
1086 cairo_transform(cr
, adg_entity_get_global_matrix(entity
));
1087 adg_entity_apply_dress(entity
, data
->frame_dress
, cr
);
1093 if (data
->title_block
)
1094 adg_entity_render((AdgEntity
*) data
->title_block
, cr
);
1096 if (_ADG_OLD_ENTITY_CLASS
->render
)
1097 _ADG_OLD_ENTITY_CLASS
->render(entity
, cr
);