3 * Copyright (C) 2001-2009 Jim Evins <evins@snaught.com>.
5 * This file is part of gLabels.
7 * gLabels is free software: you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation, either version 3 of the License, or
10 * (at your option) any later version.
12 * gLabels is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with gLabels. If not, see <http://www.gnu.org/licenses/>.
23 #include "label-text.h"
25 #include <glib/gi18n.h>
27 #include <pango/pango.h>
31 #include "font-util.h"
32 #include "font-history.h"
37 /*========================================================*/
38 /* Private macros and constants. */
39 /*========================================================*/
41 #define FONT_SCALE (72.0/96.0)
43 #define HANDLE_OUTLINE_RGBA_ARGS 0.5, 0.5, 0.5, 0.75
44 #define HANDLE_OUTLINE_WIDTH_PIXELS 2.0
46 #define SELECTION_SLOP_PIXELS 4.0
49 /*========================================================*/
51 /*========================================================*/
53 struct _glLabelTextPrivate {
55 GtkTextTagTable *tag_table;
56 GtkTextBuffer *buffer;
60 PangoWeight font_weight;
61 gboolean font_italic_flag;
63 glColorNode *color_node;
67 gboolean size_changed;
71 gboolean checkpoint_flag;
75 /*========================================================*/
76 /* Private globals. */
77 /*========================================================*/
80 /*========================================================*/
81 /* Private function prototypes. */
82 /*========================================================*/
84 static void gl_label_text_finalize (GObject *object);
86 static void copy (glLabelObject *dst_object,
87 glLabelObject *src_object);
89 static void buffer_begin_user_action_cb (GtkTextBuffer *textbuffer,
92 static void buffer_changed_cb (GtkTextBuffer *textbuffer,
95 static void get_size (glLabelObject *object,
99 static void set_font_family (glLabelObject *object,
100 const gchar *font_family,
101 gboolean checkpoint);
103 static void set_font_size (glLabelObject *object,
105 gboolean checkpoint);
107 static void set_font_weight (glLabelObject *object,
108 PangoWeight font_weight,
109 gboolean checkpoint);
111 static void set_font_italic_flag (glLabelObject *object,
112 gboolean font_italic_flag,
113 gboolean checkpoint);
115 static void set_text_alignment (glLabelObject *object,
116 PangoAlignment text_alignment,
117 gboolean checkpoint);
119 static void set_text_line_spacing (glLabelObject *object,
120 gdouble text_line_spacing,
121 gboolean checkpoint);
123 static void set_text_color (glLabelObject *object,
124 glColorNode *text_color_node,
125 gboolean checkpoint);
127 static gchar *get_font_family (glLabelObject *object);
129 static gdouble get_font_size (glLabelObject *object);
131 static PangoWeight get_font_weight (glLabelObject *object);
133 static gboolean get_font_italic_flag (glLabelObject *object);
135 static PangoAlignment get_text_alignment (glLabelObject *object);
137 static gdouble get_text_line_spacing (glLabelObject *object);
139 static glColorNode* get_text_color (glLabelObject *object);
141 static void set_text_path (glLabelText *this,
143 gboolean screen_flag,
144 glMergeRecord *record);
146 static void draw_object (glLabelObject *object,
148 gboolean screen_flag,
149 glMergeRecord *record);
151 static void draw_shadow (glLabelObject *object,
153 gboolean screen_flag,
154 glMergeRecord *record);
156 static void draw_text_real (glLabelObject *object,
158 gboolean screen_flag,
159 glMergeRecord *record,
162 static gdouble auto_shrink_font_size (cairo_t *cr,
170 static gboolean object_at (glLabelObject *object,
175 static void draw_handles (glLabelObject *object,
179 /*****************************************************************************/
180 /* Object infrastructure. */
181 /*****************************************************************************/
182 G_DEFINE_TYPE (glLabelText, gl_label_text, GL_TYPE_LABEL_OBJECT)
185 /*****************************************************************************/
186 /* Class Init Function. */
187 /*****************************************************************************/
189 gl_label_text_class_init (glLabelTextClass *class)
191 GObjectClass *object_class = G_OBJECT_CLASS (class);
192 glLabelObjectClass *label_object_class = GL_LABEL_OBJECT_CLASS (class);
194 gl_label_text_parent_class = g_type_class_peek_parent (class);
196 label_object_class->copy = copy;
198 label_object_class->get_size = get_size;
200 label_object_class->set_font_family = set_font_family;
201 label_object_class->set_font_size = set_font_size;
202 label_object_class->set_font_weight = set_font_weight;
203 label_object_class->set_font_italic_flag = set_font_italic_flag;
204 label_object_class->set_text_alignment = set_text_alignment;
205 label_object_class->set_text_line_spacing = set_text_line_spacing;
206 label_object_class->set_text_color = set_text_color;
207 label_object_class->get_font_family = get_font_family;
208 label_object_class->get_font_size = get_font_size;
209 label_object_class->get_font_weight = get_font_weight;
210 label_object_class->get_font_italic_flag = get_font_italic_flag;
211 label_object_class->get_text_alignment = get_text_alignment;
212 label_object_class->get_text_line_spacing = get_text_line_spacing;
213 label_object_class->get_text_color = get_text_color;
214 label_object_class->draw_object = draw_object;
215 label_object_class->draw_shadow = draw_shadow;
216 label_object_class->object_at = object_at;
217 label_object_class->draw_handles = draw_handles;
219 object_class->finalize = gl_label_text_finalize;
223 /*****************************************************************************/
224 /* Object Instance Init Function. */
225 /*****************************************************************************/
227 gl_label_text_init (glLabelText *ltext)
229 ltext->priv = g_new0 (glLabelTextPrivate, 1);
231 ltext->priv->tag_table = gtk_text_tag_table_new ();
232 ltext->priv->buffer = gtk_text_buffer_new (ltext->priv->tag_table);
234 ltext->priv->size_changed = TRUE;
236 ltext->priv->checkpoint_flag = TRUE;
238 g_signal_connect (G_OBJECT(ltext->priv->buffer), "begin-user-action",
239 G_CALLBACK(buffer_begin_user_action_cb), ltext);
240 g_signal_connect (G_OBJECT(ltext->priv->buffer), "changed",
241 G_CALLBACK(buffer_changed_cb), ltext);
245 /*****************************************************************************/
246 /* Finalize Method. */
247 /*****************************************************************************/
249 gl_label_text_finalize (GObject *object)
251 glLabelText *ltext = GL_LABEL_TEXT (object);
253 g_return_if_fail (object && GL_IS_LABEL_TEXT (object));
255 g_object_unref (ltext->priv->tag_table);
256 g_object_unref (ltext->priv->buffer);
257 g_free (ltext->priv->font_family);
258 gl_color_node_free (&(ltext->priv->color_node));
259 g_free (ltext->priv);
261 G_OBJECT_CLASS (gl_label_text_parent_class)->finalize (object);
265 /*****************************************************************************/
266 /** New Object Generator. */
267 /*****************************************************************************/
269 gl_label_text_new (glLabel *label,
273 glColorNode *color_node;
275 ltext = g_object_new (gl_label_text_get_type(), NULL);
281 gl_label_checkpoint (label, _("Create text object"));
284 color_node = gl_color_node_new_default ();
286 color_node->color = gl_label_get_default_text_color (label);
288 ltext->priv->font_family = gl_label_get_default_font_family (label);
289 ltext->priv->font_size = gl_label_get_default_font_size (label);
290 ltext->priv->font_weight = gl_label_get_default_font_weight (label);
291 ltext->priv->font_italic_flag = gl_label_get_default_font_italic_flag (label);
292 ltext->priv->align = gl_label_get_default_text_alignment (label);
293 ltext->priv->color_node = color_node;
294 ltext->priv->line_spacing = gl_label_get_default_text_line_spacing (label);
296 gl_label_add_object (label, GL_LABEL_OBJECT (ltext));
297 gl_label_object_set_parent (GL_LABEL_OBJECT (ltext), label);
300 return G_OBJECT (ltext);
304 /*****************************************************************************/
305 /* Copy object contents. */
306 /*****************************************************************************/
308 copy (glLabelObject *dst_object,
309 glLabelObject *src_object)
311 glLabelText *ltext = (glLabelText *)src_object;
312 glLabelText *new_ltext = (glLabelText *)dst_object;
314 glColorNode *text_color_node;
316 gl_debug (DEBUG_LABEL, "START");
318 g_return_if_fail (ltext && GL_IS_LABEL_TEXT (ltext));
319 g_return_if_fail (new_ltext && GL_IS_LABEL_TEXT (new_ltext));
321 lines = gl_label_text_get_lines (ltext);
322 text_color_node = get_text_color (src_object);
323 gl_label_text_set_lines (new_ltext, lines, FALSE);
325 new_ltext->priv->font_family = g_strdup (ltext->priv->font_family);
326 new_ltext->priv->font_size = ltext->priv->font_size;
327 new_ltext->priv->font_weight = ltext->priv->font_weight;
328 new_ltext->priv->font_italic_flag = ltext->priv->font_italic_flag;
329 set_text_color (dst_object, text_color_node, FALSE);
330 new_ltext->priv->align = ltext->priv->align;
331 new_ltext->priv->line_spacing = ltext->priv->line_spacing;
332 new_ltext->priv->auto_shrink = ltext->priv->auto_shrink;
334 new_ltext->priv->size_changed = ltext->priv->size_changed;
335 new_ltext->priv->w = ltext->priv->w;
336 new_ltext->priv->h = ltext->priv->h;
338 gl_color_node_free (&text_color_node);
339 gl_text_node_lines_free (&lines);
341 gl_debug (DEBUG_LABEL, "END");
345 /*****************************************************************************/
346 /* Set object params. */
347 /*****************************************************************************/
349 gl_label_text_set_lines (glLabelText *ltext,
355 gl_debug (DEBUG_LABEL, "START");
357 g_return_if_fail (ltext && GL_IS_LABEL_TEXT (ltext));
359 ltext->priv->checkpoint_flag = checkpoint;
361 text = gl_text_node_lines_expand (lines, NULL);
362 gtk_text_buffer_set_text (ltext->priv->buffer, text, -1);
365 ltext->priv->size_changed = TRUE;
367 ltext->priv->checkpoint_flag = TRUE;
369 gl_debug (DEBUG_LABEL, "END");
374 gl_label_text_set_text (glLabelText *ltext,
378 gl_debug (DEBUG_LABEL, "START");
380 g_return_if_fail (ltext && GL_IS_LABEL_TEXT (ltext));
382 ltext->priv->checkpoint_flag = checkpoint;
384 gtk_text_buffer_set_text (ltext->priv->buffer, text, -1);
386 ltext->priv->size_changed = TRUE;
388 ltext->priv->checkpoint_flag = TRUE;
390 gl_debug (DEBUG_LABEL, "END");
394 /*****************************************************************************/
395 /* Get object params. */
396 /*****************************************************************************/
398 gl_label_text_get_buffer (glLabelText *ltext)
400 g_return_val_if_fail (ltext && GL_IS_LABEL_TEXT (ltext), NULL);
402 return ltext->priv->buffer;
407 gl_label_text_get_lines (glLabelText *ltext)
409 GtkTextIter start, end;
413 g_return_val_if_fail (ltext && GL_IS_LABEL_TEXT (ltext), NULL);
415 gtk_text_buffer_get_bounds (ltext->priv->buffer, &start, &end);
416 text = gtk_text_buffer_get_text (ltext->priv->buffer,
417 &start, &end, FALSE);
418 lines = gl_text_node_lines_new_from_text (text);
426 gl_label_text_get_text (glLabelText *ltext)
428 GtkTextIter start, end;
431 g_return_val_if_fail (ltext && GL_IS_LABEL_TEXT (ltext), NULL);
433 gtk_text_buffer_get_bounds (ltext->priv->buffer, &start, &end);
434 text = gtk_text_buffer_get_text (ltext->priv->buffer,
435 &start, &end, FALSE);
441 /*****************************************************************************/
442 /* Text buffer "changed" callback. */
443 /*****************************************************************************/
445 buffer_begin_user_action_cb (GtkTextBuffer *textbuffer,
450 if ( ltext->priv->checkpoint_flag )
452 label = gl_label_object_get_parent (GL_LABEL_OBJECT (ltext));
453 gl_label_checkpoint (label, _("Typing"));
458 /*****************************************************************************/
459 /* Text buffer "changed" callback. */
460 /*****************************************************************************/
462 buffer_changed_cb (GtkTextBuffer *textbuffer,
465 ltext->priv->size_changed = TRUE;
467 gl_label_object_emit_changed (GL_LABEL_OBJECT(ltext));
471 /*****************************************************************************/
472 /* Get object size method. */
473 /*****************************************************************************/
475 get_size (glLabelObject *object,
479 glLabelText *ltext = (glLabelText *)object;
480 PangoFontMap *fontmap;
481 PangoContext *context;
482 cairo_font_options_t *options;
485 PangoFontDescription *desc;
487 gdouble line_spacing;
488 GtkTextIter start, end;
490 gdouble w_parent, h_parent;
493 gl_debug (DEBUG_LABEL, "START");
495 g_return_if_fail (ltext && GL_IS_LABEL_TEXT (ltext));
497 gl_label_object_get_raw_size (object, &w_parent, &h_parent);
499 if ( (w_parent != 0.0) || (h_parent != 0.0) ) {
505 if (!ltext->priv->size_changed)
512 font_size = GL_LABEL_TEXT (object)->priv->font_size * FONT_SCALE;
513 line_spacing = GL_LABEL_TEXT (object)->priv->line_spacing;
515 gtk_text_buffer_get_bounds (ltext->priv->buffer, &start, &end);
516 text = gtk_text_buffer_get_text (ltext->priv->buffer,
517 &start, &end, FALSE);
520 fontmap = pango_cairo_font_map_new ();
521 context = pango_cairo_font_map_create_context (PANGO_CAIRO_FONT_MAP (fontmap));
522 options = cairo_font_options_create ();
523 cairo_font_options_set_hint_style (options, CAIRO_HINT_STYLE_NONE);
524 pango_cairo_context_set_font_options (context, options);
525 cairo_font_options_destroy (options);
527 layout = pango_layout_new (context);
529 style = GL_LABEL_TEXT (object)->priv->font_italic_flag ? PANGO_STYLE_ITALIC : PANGO_STYLE_NORMAL;
531 desc = pango_font_description_new ();
532 pango_font_description_set_family (desc, GL_LABEL_TEXT (object)->priv->font_family);
533 pango_font_description_set_weight (desc, GL_LABEL_TEXT (object)->priv->font_weight);
534 pango_font_description_set_style (desc, style);
535 pango_font_description_set_size (desc, font_size * PANGO_SCALE);
536 pango_layout_set_font_description (layout, desc);
537 pango_font_description_free (desc);
539 pango_layout_set_spacing (layout, font_size * (line_spacing-1) * PANGO_SCALE);
540 pango_layout_set_text (layout, text, -1);
541 pango_layout_get_size (layout, &iw, &ih);
542 *w = ltext->priv->w = iw / PANGO_SCALE + 2*GL_LABEL_TEXT_MARGIN;
543 *h = ltext->priv->h = ih / PANGO_SCALE;
544 ltext->priv->size_changed = FALSE;
546 g_object_unref (layout);
547 g_object_unref (context);
548 g_object_unref (fontmap);
551 gl_debug (DEBUG_LABEL, "END");
555 /*****************************************************************************/
556 /* Set font family method. */
557 /*****************************************************************************/
559 set_font_family (glLabelObject *object,
560 const gchar *font_family,
563 glLabelText *ltext = (glLabelText *)object;
564 gchar *good_font_family;
567 gl_debug (DEBUG_LABEL, "START");
569 g_return_if_fail (ltext && GL_IS_LABEL_TEXT (ltext));
570 g_return_if_fail (font_family);
572 good_font_family = gl_font_util_validate_family (font_family);
574 if (ltext->priv->font_family) {
575 if (strcmp (ltext->priv->font_family, good_font_family) == 0) {
576 g_free (good_font_family);
577 gl_debug (DEBUG_LABEL, "END (no change)");
580 g_free (ltext->priv->font_family);
585 label = gl_label_object_get_parent (GL_LABEL_OBJECT (ltext));
586 gl_label_checkpoint (label, _("Font family"));
589 ltext->priv->font_family = g_strdup (good_font_family);
590 g_free (good_font_family);
592 gl_debug (DEBUG_LABEL, "new font family = %s", ltext->priv->font_family);
594 ltext->priv->size_changed = TRUE;
596 gl_font_history_model_add_family (gl_font_history, ltext->priv->font_family);
598 gl_label_object_emit_changed (GL_LABEL_OBJECT(ltext));
600 gl_debug (DEBUG_LABEL, "END");
604 /*****************************************************************************/
605 /* Set font size method. */
606 /*****************************************************************************/
608 set_font_size (glLabelObject *object,
612 glLabelText *ltext = (glLabelText *)object;
615 gl_debug (DEBUG_LABEL, "START");
617 g_return_if_fail (ltext && GL_IS_LABEL_TEXT (ltext));
619 if (ltext->priv->font_size != font_size)
623 label = gl_label_object_get_parent (GL_LABEL_OBJECT (ltext));
624 gl_label_checkpoint (label, _("Font size"));
627 ltext->priv->size_changed = TRUE;
629 ltext->priv->font_size = font_size;
630 gl_label_object_emit_changed (GL_LABEL_OBJECT(ltext));
633 gl_debug (DEBUG_LABEL, "END");
637 /*****************************************************************************/
638 /* Set font weight method. */
639 /*****************************************************************************/
641 set_font_weight (glLabelObject *object,
642 PangoWeight font_weight,
645 glLabelText *ltext = (glLabelText *)object;
648 gl_debug (DEBUG_LABEL, "START");
650 g_return_if_fail (ltext && GL_IS_LABEL_TEXT (ltext));
652 if (ltext->priv->font_weight != font_weight)
656 label = gl_label_object_get_parent (GL_LABEL_OBJECT (ltext));
657 gl_label_checkpoint (label, _("Font weight"));
660 ltext->priv->size_changed = TRUE;
662 ltext->priv->font_weight = font_weight;
663 gl_label_object_emit_changed (GL_LABEL_OBJECT(ltext));
666 gl_debug (DEBUG_LABEL, "END");
670 /*****************************************************************************/
671 /* Set font italic flag method. */
672 /*****************************************************************************/
674 set_font_italic_flag (glLabelObject *object,
675 gboolean font_italic_flag,
678 glLabelText *ltext = (glLabelText *)object;
681 gl_debug (DEBUG_LABEL, "START");
683 g_return_if_fail (ltext && GL_IS_LABEL_TEXT (ltext));
685 if (ltext->priv->font_italic_flag != font_italic_flag)
689 label = gl_label_object_get_parent (GL_LABEL_OBJECT (ltext));
690 gl_label_checkpoint (label, _("Italic"));
693 ltext->priv->size_changed = TRUE;
695 ltext->priv->font_italic_flag = font_italic_flag;
696 gl_label_object_emit_changed (GL_LABEL_OBJECT(ltext));
699 gl_debug (DEBUG_LABEL, "END");
703 /*****************************************************************************/
704 /* Set text alignment method. */
705 /*****************************************************************************/
707 set_text_alignment (glLabelObject *object,
708 PangoAlignment text_alignment,
711 glLabelText *ltext = (glLabelText *)object;
714 gl_debug (DEBUG_LABEL, "START");
716 g_return_if_fail (ltext && GL_IS_LABEL_TEXT (ltext));
718 if (ltext->priv->align != text_alignment)
722 label = gl_label_object_get_parent (GL_LABEL_OBJECT (ltext));
723 gl_label_checkpoint (label, _("Align text"));
726 ltext->priv->size_changed = TRUE;
728 ltext->priv->align = text_alignment;
729 gl_label_object_emit_changed (GL_LABEL_OBJECT(ltext));
732 gl_debug (DEBUG_LABEL, "END");
736 /*****************************************************************************/
737 /* Set text line spacing method. */
738 /*****************************************************************************/
740 set_text_line_spacing (glLabelObject *object,
741 gdouble line_spacing,
744 glLabelText *ltext = (glLabelText *)object;
747 gl_debug (DEBUG_LABEL, "START");
749 g_return_if_fail (ltext && GL_IS_LABEL_TEXT (ltext));
751 if (ltext->priv->line_spacing != line_spacing)
755 label = gl_label_object_get_parent (GL_LABEL_OBJECT (ltext));
756 gl_label_checkpoint (label, _("Line spacing"));
759 ltext->priv->size_changed = TRUE;
761 ltext->priv->line_spacing = line_spacing;
762 gl_label_object_emit_changed (GL_LABEL_OBJECT(ltext));
765 gl_debug (DEBUG_LABEL, "END");
769 /*****************************************************************************/
770 /* Set text color method. */
771 /*****************************************************************************/
773 set_text_color (glLabelObject *object,
774 glColorNode *text_color_node,
777 glLabelText *ltext = (glLabelText *)object;
780 gl_debug (DEBUG_LABEL, "START");
782 g_return_if_fail (ltext && GL_IS_LABEL_TEXT (ltext));
784 if (!gl_color_node_equal (ltext->priv->color_node, text_color_node))
788 label = gl_label_object_get_parent (GL_LABEL_OBJECT (ltext));
789 gl_label_checkpoint (label, _("Text color"));
792 gl_color_node_free (&(ltext->priv->color_node));
793 ltext->priv->color_node = gl_color_node_dup (text_color_node);
795 gl_label_object_emit_changed (GL_LABEL_OBJECT(ltext));
798 gl_debug (DEBUG_LABEL, "END");
802 /*****************************************************************************/
803 /* Get font family method. */
804 /*****************************************************************************/
806 get_font_family (glLabelObject *object)
808 glLabelText *ltext = (glLabelText *)object;
810 gl_debug (DEBUG_LABEL, "");
812 g_return_val_if_fail (ltext && GL_IS_LABEL_TEXT (ltext), NULL);
814 return g_strdup (ltext->priv->font_family);
818 /*****************************************************************************/
819 /* Get font size method. */
820 /*****************************************************************************/
822 get_font_size (glLabelObject *object)
824 glLabelText *ltext = (glLabelText *)object;
826 gl_debug (DEBUG_LABEL, "");
828 g_return_val_if_fail (ltext && GL_IS_LABEL_TEXT (ltext), 0.0);
830 return ltext->priv->font_size;
834 /*****************************************************************************/
835 /* Get font weight method. */
836 /*****************************************************************************/
838 get_font_weight (glLabelObject *object)
840 glLabelText *ltext = (glLabelText *)object;
842 gl_debug (DEBUG_LABEL, "");
844 g_return_val_if_fail (ltext && GL_IS_LABEL_TEXT (ltext), PANGO_WEIGHT_NORMAL);
846 return ltext->priv->font_weight;
850 /*****************************************************************************/
851 /* Get font italic flag method. */
852 /*****************************************************************************/
854 get_font_italic_flag (glLabelObject *object)
856 glLabelText *ltext = (glLabelText *)object;
858 gl_debug (DEBUG_LABEL, "");
860 g_return_val_if_fail (ltext && GL_IS_LABEL_TEXT (ltext), FALSE);
862 return ltext->priv->font_italic_flag;
866 /*****************************************************************************/
867 /* Get text alignment method. */
868 /*****************************************************************************/
869 static PangoAlignment
870 get_text_alignment (glLabelObject *object)
872 glLabelText *ltext = (glLabelText *)object;
874 gl_debug (DEBUG_LABEL, "");
876 g_return_val_if_fail (ltext && GL_IS_LABEL_TEXT (ltext), GTK_JUSTIFY_LEFT);
878 return ltext->priv->align;
882 /*****************************************************************************/
883 /* Get text line spacing method. */
884 /*****************************************************************************/
886 get_text_line_spacing (glLabelObject *object)
888 glLabelText *ltext = (glLabelText *)object;
890 gl_debug (DEBUG_LABEL, "");
892 g_return_val_if_fail (ltext && GL_IS_LABEL_TEXT (ltext), 0.0);
894 return ltext->priv->line_spacing;
898 /*****************************************************************************/
899 /* Get text color method. */
900 /*****************************************************************************/
902 get_text_color (glLabelObject *object)
904 glLabelText *ltext = (glLabelText *)object;
906 gl_debug (DEBUG_LABEL, "");
908 g_return_val_if_fail (ltext && GL_IS_LABEL_TEXT (ltext), 0);
910 return gl_color_node_dup (ltext->priv->color_node);
914 /*****************************************************************************/
915 /* Set auto shrink flag. */
916 /*****************************************************************************/
918 gl_label_text_set_auto_shrink (glLabelText *ltext,
919 gboolean auto_shrink,
924 gl_debug (DEBUG_LABEL, "BEGIN");
926 g_return_if_fail (ltext && GL_IS_LABEL_TEXT (ltext));
928 if (ltext->priv->auto_shrink != auto_shrink)
932 label = gl_label_object_get_parent (GL_LABEL_OBJECT (ltext));
933 gl_label_checkpoint (label, _("Auto shrink"));
936 ltext->priv->auto_shrink = auto_shrink;
937 gl_label_object_emit_changed (GL_LABEL_OBJECT(ltext));
940 gl_debug (DEBUG_LABEL, "END");
944 /*****************************************************************************/
945 /* Query auto shrink flag. */
946 /*****************************************************************************/
948 gl_label_text_get_auto_shrink (glLabelText *ltext)
950 gl_debug (DEBUG_LABEL, "");
952 g_return_val_if_fail (ltext && GL_IS_LABEL_TEXT (ltext), 0);
954 return ltext->priv->auto_shrink;
958 /*****************************************************************************/
959 /* Automatically shrink text size to fit within horizontal width. */
960 /*****************************************************************************/
962 auto_shrink_font_size (cairo_t *cr,
971 PangoFontDescription *desc;
973 gdouble layout_width;
976 layout = pango_cairo_create_layout (cr);
978 desc = pango_font_description_new ();
979 pango_font_description_set_family (desc, family);
980 pango_font_description_set_weight (desc, weight);
981 pango_font_description_set_style (desc, style);
982 pango_font_description_set_size (desc, size * PANGO_SCALE);
984 pango_layout_set_font_description (layout, desc);
985 pango_font_description_free (desc);
987 pango_layout_set_text (layout, text, -1);
988 pango_layout_set_width (layout, -1);
989 pango_layout_get_size (layout, &iw, &ih);
990 layout_width = (gdouble)iw / (gdouble)PANGO_SCALE;
992 g_object_unref (layout);
994 g_print ("Object w = %g, layout w = %g\n", width, layout_width);
996 if ( layout_width > width )
999 new_size = size * (width-2*GL_LABEL_TEXT_MARGIN)/layout_width;
1001 /* Round down to nearest 1/2 point */
1002 new_size = (int)(new_size*2.0) / 2.0;
1004 /* don't get ridiculously small. */
1019 /*****************************************************************************/
1020 /* Update pango layout. */
1021 /*****************************************************************************/
1023 set_text_path (glLabelText *this,
1025 gboolean screen_flag,
1026 glMergeRecord *record)
1028 gdouble object_w, object_h;
1029 gdouble raw_w, raw_h;
1033 gboolean auto_shrink;
1034 PangoLayout *layout;
1036 PangoFontDescription *desc;
1037 cairo_font_options_t *font_options;
1038 PangoContext *context;
1041 gl_debug (DEBUG_LABEL, "START");
1045 gl_label_object_get_size (GL_LABEL_OBJECT (this), &object_w, &object_h);
1046 gl_label_object_get_raw_size (GL_LABEL_OBJECT (this), &raw_w, &raw_h);
1048 lines = gl_label_text_get_lines (this);
1049 text = gl_text_node_lines_expand (lines, record);
1051 style = this->priv->font_italic_flag ? PANGO_STYLE_ITALIC : PANGO_STYLE_NORMAL;
1053 font_size = this->priv->font_size;
1054 auto_shrink = gl_label_text_get_auto_shrink (this);
1055 if (!screen_flag && record && auto_shrink && (raw_w != 0.0))
1057 font_size = auto_shrink_font_size (cr,
1058 this->priv->font_family,
1059 this->priv->font_size * FONT_SCALE,
1060 this->priv->font_weight,
1067 layout = pango_cairo_create_layout (cr);
1069 font_options = cairo_font_options_create ();
1070 cairo_font_options_set_hint_style (font_options, CAIRO_HINT_STYLE_NONE);
1071 context = pango_layout_get_context (layout);
1072 pango_cairo_context_set_font_options (context, font_options);
1073 cairo_font_options_destroy (font_options);
1075 desc = pango_font_description_new ();
1076 pango_font_description_set_family (desc, this->priv->font_family);
1077 pango_font_description_set_weight (desc, this->priv->font_weight);
1078 pango_font_description_set_size (desc, font_size * FONT_SCALE * PANGO_SCALE);
1079 pango_font_description_set_style (desc, style);
1080 pango_layout_set_font_description (layout, desc);
1081 pango_font_description_free (desc);
1083 pango_layout_set_text (layout, text, -1);
1084 pango_layout_set_spacing (layout, font_size * (this->priv->line_spacing-1) * PANGO_SCALE);
1087 pango_layout_set_width (layout, -1);
1091 pango_layout_set_width (layout, object_w * PANGO_SCALE);
1093 pango_layout_set_wrap (layout, PANGO_WRAP_WORD);
1094 pango_layout_set_alignment (layout, this->priv->align);
1097 cairo_move_to (cr, GL_LABEL_TEXT_MARGIN, 0);
1098 pango_cairo_layout_path (cr, layout);
1100 g_object_unref (layout);
1101 gl_text_node_lines_free (&lines);
1105 gl_debug (DEBUG_LABEL, "END");
1109 /*****************************************************************************/
1110 /* Draw object method. */
1111 /*****************************************************************************/
1113 draw_object (glLabelObject *object,
1115 gboolean screen_flag,
1116 glMergeRecord *record)
1118 glColorNode *color_node;
1121 gl_debug (DEBUG_LABEL, "START");
1123 color_node = gl_label_object_get_text_color (object);
1124 color = gl_color_node_expand (color_node, record);
1125 if (color_node->field_flag && screen_flag)
1127 color = GL_COLOR_MERGE_DEFAULT;
1129 gl_color_node_free (&color_node);
1131 draw_text_real (object, cr, screen_flag, record, color);
1133 gl_debug (DEBUG_LABEL, "END");
1137 /*****************************************************************************/
1138 /* Draw shadow method. */
1139 /*****************************************************************************/
1141 draw_shadow (glLabelObject *object,
1143 gboolean screen_flag,
1144 glMergeRecord *record)
1146 glColorNode *color_node;
1148 glColorNode *shadow_color_node;
1149 gdouble shadow_opacity;
1152 gl_debug (DEBUG_LABEL, "START");
1154 color_node = gl_label_object_get_text_color (object);
1155 color = gl_color_node_expand (color_node, record);
1156 if (color_node->field_flag && screen_flag)
1158 color = GL_COLOR_MERGE_DEFAULT;
1160 gl_color_node_free (&color_node);
1162 shadow_color_node = gl_label_object_get_shadow_color (object);
1163 if (shadow_color_node->field_flag)
1165 shadow_color_node->color = GL_COLOR_SHADOW_MERGE_DEFAULT;
1167 shadow_opacity = gl_label_object_get_shadow_opacity (object);
1168 shadow_color = gl_color_shadow (shadow_color_node->color, shadow_opacity, color);
1169 gl_color_node_free (&shadow_color_node);
1171 draw_text_real (object, cr, screen_flag, record, shadow_color);
1173 gl_debug (DEBUG_LABEL, "END");
1177 /*****************************************************************************/
1179 /*****************************************************************************/
1181 draw_text_real (glLabelObject *object,
1183 gboolean screen_flag,
1184 glMergeRecord *record,
1187 gl_debug (DEBUG_LABEL, "START");
1189 set_text_path (GL_LABEL_TEXT (object), cr, screen_flag, record);
1191 cairo_set_source_rgba (cr, GL_COLOR_RGBA_ARGS (color));
1194 gl_debug (DEBUG_LABEL, "END");
1198 /*****************************************************************************/
1199 /* Is object at coordinates? */
1200 /*****************************************************************************/
1202 object_at (glLabelObject *object,
1208 gdouble scale_x, scale_y;
1210 gl_label_object_get_size (object, &w, &h);
1212 if ( (x >= 0) && (x <= w) && (y >= 0) && (y <= h) )
1214 cairo_new_path (cr);
1215 set_text_path (GL_LABEL_TEXT (object), cr, TRUE, NULL);
1216 if (cairo_in_fill (cr, x, y))
1224 cairo_device_to_user_distance (cr, &scale_x, &scale_y);
1226 cairo_set_line_width (cr, 2*SELECTION_SLOP_PIXELS*scale_x);
1228 if (cairo_in_stroke (cr, x, y))
1234 if (gl_label_object_is_selected (object))
1236 cairo_new_path (cr);
1237 cairo_rectangle (cr, 0, 0, w, h);
1241 cairo_device_to_user_distance (cr, &scale_x, &scale_y);
1243 cairo_set_line_width (cr, 2*SELECTION_SLOP_PIXELS*scale_x);
1245 if (cairo_in_stroke (cr, x, y))
1257 /*****************************************************************************/
1258 /* Draw text style handles. */
1259 /*****************************************************************************/
1261 draw_handles (glLabelObject *object,
1265 gdouble scale_x, scale_y;
1266 gdouble dashes[2] = { 2, 2 };
1268 gl_label_object_get_size (GL_LABEL_OBJECT(object), &w, &h);
1272 cairo_rectangle (cr, 0, 0, w, h);
1276 cairo_device_to_user_distance (cr, &scale_x, &scale_y);
1277 cairo_scale (cr, scale_x, scale_y);
1279 cairo_set_dash (cr, dashes, 2, 0);
1280 cairo_set_line_width (cr, HANDLE_OUTLINE_WIDTH_PIXELS);
1281 cairo_set_source_rgba (cr, HANDLE_OUTLINE_RGBA_ARGS);
1286 gl_label_object_draw_handles_box (object, cr);
1293 * Local Variables: -- emacs
1295 * c-basic-offset: 8 -- emacs
1296 * tab-width: 8 -- emacs
1297 * indent-tabs-mode: nil -- emacs