1 /* GTK - The GIMP Toolkit
2 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library 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 * Library General Public License for more details.
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
24 #include "gtkwidget.h"
25 #include "gtkdrawwindow.h"
26 #include "gtksignal.h"
28 #include "gtktooltips.h"
31 #define DEFAULT_DELAY 500 /* Default delay in ms */
33 static void gtk_tooltips_class_init (GtkTooltipsClass *klass);
34 static void gtk_tooltips_init (GtkTooltips *tooltips);
35 static void gtk_tooltips_destroy (GtkObject *object);
37 static gint gtk_tooltips_event_handler (GtkWidget *widget,
39 static void gtk_tooltips_widget_unmap (GtkWidget *widget,
41 static void gtk_tooltips_widget_remove (GtkWidget *widget,
43 static void gtk_tooltips_set_active_widget (GtkTooltips *tooltips,
45 static gint gtk_tooltips_timeout (gpointer data);
46 static gint gtk_tooltips_expose (GtkTooltips *tooltips,
47 GdkEventExpose *event);
49 static void gtk_tooltips_draw_tips (GtkTooltips *tooltips);
51 static GtkDataClass *parent_class;
52 static const gchar *tooltips_data_key = "_GtkTooltipsData";
55 gtk_tooltips_get_type (void)
57 static GtkType tooltips_type = 0;
61 GtkTypeInfo tooltips_info =
65 sizeof (GtkTooltipsClass),
66 (GtkClassInitFunc) gtk_tooltips_class_init,
67 (GtkObjectInitFunc) gtk_tooltips_init,
68 /* reserved_1 */ NULL,
69 /* reserved_2 */ NULL,
70 (GtkClassInitFunc) NULL,
73 tooltips_type = gtk_type_unique (GTK_TYPE_DATA, &tooltips_info);
80 gtk_tooltips_class_init (GtkTooltipsClass *class)
82 GtkObjectClass *object_class;
84 object_class = (GtkObjectClass*) class;
85 parent_class = gtk_type_class (GTK_TYPE_DATA);
87 object_class->destroy = gtk_tooltips_destroy;
91 gtk_tooltips_init (GtkTooltips *tooltips)
93 tooltips->tip_window = NULL;
94 tooltips->active_tips_data = NULL;
95 tooltips->tips_data_list = NULL;
97 tooltips->foreground = NULL;
98 tooltips->background = NULL;
100 tooltips->delay = DEFAULT_DELAY;
101 tooltips->enabled = TRUE;
102 tooltips->timer_tag = 0;
106 gtk_tooltips_new (void)
108 return gtk_type_new (GTK_TYPE_TOOLTIPS);
112 gtk_tooltips_free_string (gpointer data, gpointer user_data)
119 gtk_tooltips_destroy_data (GtkTooltipsData *tooltipsdata)
121 g_free (tooltipsdata->tip_text);
122 g_free (tooltipsdata->tip_private);
123 g_list_foreach (tooltipsdata->row, gtk_tooltips_free_string, 0);
124 if (tooltipsdata->row)
125 g_list_free (tooltipsdata->row);
126 gtk_signal_disconnect_by_data (GTK_OBJECT (tooltipsdata->widget),
127 (gpointer) tooltipsdata);
128 gtk_object_remove_data (GTK_OBJECT (tooltipsdata->widget), tooltips_data_key);
129 gtk_widget_unref (tooltipsdata->widget);
130 g_free (tooltipsdata);
134 gtk_tooltips_destroy (GtkObject *object)
136 GtkTooltips *tooltips = GTK_TOOLTIPS (object);
138 GtkTooltipsData *tooltipsdata;
140 g_return_if_fail (tooltips != NULL);
142 if (tooltips->timer_tag)
144 gtk_timeout_remove (tooltips->timer_tag);
145 tooltips->timer_tag = 0;
148 if (tooltips->tips_data_list != NULL)
150 current = g_list_first (tooltips->tips_data_list);
151 while (current != NULL)
153 tooltipsdata = (GtkTooltipsData*) current->data;
154 current = current->next;
155 gtk_tooltips_widget_remove (tooltipsdata->widget, tooltipsdata);
159 if (tooltips->tip_window)
160 gtk_widget_destroy (tooltips->tip_window);
162 if (tooltips->gc != NULL)
164 gdk_gc_destroy (tooltips->gc);
170 gtk_tooltips_force_window (GtkTooltips *tooltips)
172 g_return_if_fail (tooltips != NULL);
173 g_return_if_fail (GTK_IS_TOOLTIPS (tooltips));
175 if (!tooltips->tip_window)
177 tooltips->tip_window = gtk_draw_window_new (GTK_WINDOW_POPUP);
178 gtk_widget_ref (tooltips->tip_window);
179 gtk_window_set_policy (GTK_WINDOW (tooltips->tip_window), FALSE, FALSE, TRUE);
181 gtk_signal_connect_object (GTK_OBJECT (tooltips->tip_window),
183 GTK_SIGNAL_FUNC (gtk_tooltips_expose),
184 GTK_OBJECT (tooltips));
186 gtk_signal_connect (GTK_OBJECT (tooltips->tip_window),
188 gtk_widget_destroyed,
189 &tooltips->tip_window);
194 gtk_tooltips_layout_text (GtkTooltips *tooltips, GtkTooltipsData *data)
196 gchar *row_end, *text, *row_text, *break_pos;
197 gint i, row_width, window_width = 0;
200 if (!tooltips->tip_window)
201 gtk_tooltips_force_window (tooltips);
203 g_list_foreach (data->row, gtk_tooltips_free_string, 0);
205 g_list_free (data->row);
207 data->font = tooltips->tip_window->style->font;
210 text = data->tip_text;
216 row_end = strchr (text, '\n');
218 row_end = strchr (text, '\0');
220 len = row_end - text + 1;
221 row_text = g_new(gchar, len);
222 memcpy (row_text, text, len - 1);
223 row_text[len - 1] = '\0';
225 /* now either adjust the window's width or shorten the row until
226 it fits in the window */
230 row_width = gdk_string_width (data->font, row_text);
233 /* make an initial guess at window's width: */
235 if (row_width > gdk_screen_width () / 4)
236 window_width = gdk_screen_width () / 4;
238 window_width = row_width;
240 if (row_width <= window_width)
243 if (strchr (row_text, ' '))
245 /* the row is currently too wide, but we have blanks in
246 the row so we can break it into smaller pieces */
248 gint avg_width = row_width / strlen (row_text);
253 if ((size_t) i >= len)
256 break_pos = strchr (row_text + i, ' ');
259 break_pos = row_text + i;
260 while (*--break_pos != ' ');
266 /* we can't break this row into any smaller pieces, so
267 we have no choice but to widen the window: */
269 window_width = row_width;
273 if (row_width > data->width)
274 data->width = row_width;
275 data->row = g_list_append (data->row, row_text);
276 text += strlen (row_text);
280 if (text[0] == '\n' && text[1])
281 /* end of paragraph and there is more text to come */
282 data->row = g_list_append (data->row, 0);
283 ++text; /* skip blank or newline */
285 data->width += 8; /* leave some border */
289 gtk_tooltips_enable (GtkTooltips *tooltips)
291 g_return_if_fail (tooltips != NULL);
293 tooltips->enabled = TRUE;
297 gtk_tooltips_disable (GtkTooltips *tooltips)
299 g_return_if_fail (tooltips != NULL);
301 gtk_tooltips_set_active_widget (tooltips, NULL);
303 tooltips->enabled = FALSE;
307 gtk_tooltips_set_delay (GtkTooltips *tooltips,
310 g_return_if_fail (tooltips != NULL);
312 tooltips->delay = delay;
316 gtk_tooltips_data_get (GtkWidget *widget)
318 g_return_val_if_fail (widget != NULL, NULL);
320 return gtk_object_get_data ((GtkObject*) widget, tooltips_data_key);
324 gtk_tooltips_set_tip (GtkTooltips *tooltips,
326 const gchar *tip_text,
327 const gchar *tip_private)
329 GtkTooltipsData *tooltipsdata;
331 g_return_if_fail (tooltips != NULL);
332 g_return_if_fail (GTK_IS_TOOLTIPS (tooltips));
333 g_return_if_fail (widget != NULL);
335 tooltipsdata = gtk_tooltips_data_get (widget);
337 gtk_tooltips_widget_remove (tooltipsdata->widget, tooltipsdata);
342 tooltipsdata = g_new0 (GtkTooltipsData, 1);
344 if (tooltipsdata != NULL)
346 tooltipsdata->tooltips = tooltips;
347 tooltipsdata->widget = widget;
348 gtk_widget_ref (widget);
350 tooltipsdata->tip_text = g_strdup (tip_text);
351 tooltipsdata->tip_private = g_strdup (tip_private);
353 gtk_tooltips_layout_text (tooltips, tooltipsdata);
354 tooltips->tips_data_list = g_list_append (tooltips->tips_data_list,
356 gtk_signal_connect_after(GTK_OBJECT (widget), "event",
357 (GtkSignalFunc) gtk_tooltips_event_handler,
358 (gpointer) tooltipsdata);
360 gtk_object_set_data (GTK_OBJECT (widget), tooltips_data_key,
361 (gpointer) tooltipsdata);
363 gtk_signal_connect (GTK_OBJECT (widget), "unmap",
364 (GtkSignalFunc) gtk_tooltips_widget_unmap,
365 (gpointer) tooltipsdata);
367 gtk_signal_connect (GTK_OBJECT (widget), "unrealize",
368 (GtkSignalFunc) gtk_tooltips_widget_unmap,
369 (gpointer) tooltipsdata);
371 gtk_signal_connect (GTK_OBJECT (widget), "destroy",
372 (GtkSignalFunc) gtk_tooltips_widget_remove,
373 (gpointer) tooltipsdata);
378 gtk_tooltips_set_colors (GtkTooltips *tooltips,
379 GdkColor *background,
380 GdkColor *foreground)
382 g_return_if_fail (tooltips != NULL);
384 if (background != NULL)
385 tooltips->foreground = foreground;
386 if (foreground != NULL)
387 tooltips->background = background;
391 gtk_tooltips_expose (GtkTooltips *tooltips, GdkEventExpose *event)
394 gint y, baseline_skip, gap;
395 GtkTooltipsData *data;
398 style = tooltips->tip_window->style;
400 gap = (style->font->ascent + style->font->descent) / 4;
403 baseline_skip = style->font->ascent + style->font->descent + gap;
405 data = tooltips->active_tips_data;
409 gtk_paint_flat_box(style, tooltips->tip_window->window,
410 GTK_STATE_NORMAL, GTK_SHADOW_OUT,
411 NULL, GTK_WIDGET(tooltips->tip_window), "tooltip",
414 y = style->font->ascent + 4;
416 for (el = data->row; el; el = el->next)
420 gtk_paint_string (style, tooltips->tip_window->window,
422 NULL, GTK_WIDGET(tooltips->tip_window), "tooltip",
427 y += baseline_skip / 2;
434 gtk_tooltips_draw_tips (GtkTooltips * tooltips)
438 gint gap, x, y, w, h, scr_w, scr_h, baseline_skip;
439 GtkTooltipsData *data;
442 if (!tooltips->tip_window)
443 gtk_tooltips_force_window (tooltips);
444 else if (GTK_WIDGET_VISIBLE (tooltips->tip_window))
445 gtk_widget_hide (tooltips->tip_window);
447 style = tooltips->tip_window->style;
449 widget = tooltips->active_tips_data->widget;
451 scr_w = gdk_screen_width ();
452 scr_h = gdk_screen_height ();
454 data = tooltips->active_tips_data;
455 if (data->font != style->font)
456 gtk_tooltips_layout_text (tooltips, data);
458 gap = (style->font->ascent + style->font->descent) / 4;
461 baseline_skip = style->font->ascent + style->font->descent + gap;
465 for (el = data->row; el; el = el->next)
469 h += baseline_skip / 2;
473 gdk_window_get_pointer (NULL, &x, NULL, NULL);
474 gdk_window_get_origin (widget->window, NULL, &y);
479 x -= (x + w) - scr_w;
483 if ((y + h + widget->allocation.height + 4) > scr_h)
486 y = y + widget->allocation.height + 4;
488 gtk_widget_set_usize (tooltips->tip_window, w, h);
489 gtk_widget_popup (tooltips->tip_window, x, y);
493 gtk_tooltips_timeout (gpointer data)
495 GtkTooltips *tooltips = (GtkTooltips *) data;
497 if (tooltips->active_tips_data != NULL &&
498 GTK_WIDGET_DRAWABLE (tooltips->active_tips_data->widget))
499 gtk_tooltips_draw_tips (tooltips);
505 gtk_tooltips_set_active_widget (GtkTooltips *tooltips,
508 if (tooltips->tip_window)
509 gtk_widget_hide (tooltips->tip_window);
510 if (tooltips->timer_tag)
512 gtk_timeout_remove (tooltips->timer_tag);
513 tooltips->timer_tag = 0;
516 tooltips->active_tips_data = NULL;
522 for (list = tooltips->tips_data_list; list; list = list->next)
524 GtkTooltipsData *tooltipsdata;
526 tooltipsdata = list->data;
528 if (tooltipsdata->widget == widget &&
529 GTK_WIDGET_DRAWABLE (widget))
531 tooltips->active_tips_data = tooltipsdata;
539 gtk_tooltips_event_handler (GtkWidget *widget,
542 GtkTooltips *tooltips;
543 GtkTooltipsData *old_tips_data;
544 GtkWidget *event_widget;
546 if ((event->type == GDK_LEAVE_NOTIFY || event->type == GDK_ENTER_NOTIFY) &&
547 event->crossing.detail == GDK_NOTIFY_INFERIOR)
550 event_widget = gtk_get_event_widget (event);
551 if (event_widget != widget)
554 old_tips_data = gtk_tooltips_data_get (widget);
555 tooltips = old_tips_data->tooltips;
559 case GDK_MOTION_NOTIFY:
564 case GDK_ENTER_NOTIFY:
565 old_tips_data = tooltips->active_tips_data;
566 if (tooltips->enabled &&
567 (!old_tips_data || old_tips_data->widget != widget))
569 gtk_tooltips_set_active_widget (tooltips, widget);
571 tooltips->timer_tag = gtk_timeout_add (tooltips->delay,
572 gtk_tooltips_timeout,
573 (gpointer) tooltips);
578 gtk_tooltips_set_active_widget (tooltips, NULL);
586 gtk_tooltips_widget_unmap (GtkWidget *widget,
589 GtkTooltipsData *tooltipsdata = (GtkTooltipsData *)data;
590 GtkTooltips *tooltips = tooltipsdata->tooltips;
592 if (tooltips->active_tips_data &&
593 (tooltips->active_tips_data->widget == widget))
594 gtk_tooltips_set_active_widget (tooltips, NULL);
598 gtk_tooltips_widget_remove (GtkWidget *widget,
601 GtkTooltipsData *tooltipsdata = (GtkTooltipsData*) data;
602 GtkTooltips *tooltips = tooltipsdata->tooltips;
604 gtk_tooltips_widget_unmap (widget, data);
605 tooltips->tips_data_list = g_list_remove (tooltips->tips_data_list,
607 gtk_tooltips_destroy_data (tooltipsdata);