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 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., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
21 * Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
22 * file for a list of people on the GTK+ Team. See the ChangeLog
23 * files for a list of changes. These files are distributed with
24 * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
38 static void gtk_ruler_class_init (GtkRulerClass *klass);
39 static void gtk_ruler_init (GtkRuler *ruler);
40 static void gtk_ruler_realize (GtkWidget *widget);
41 static void gtk_ruler_unrealize (GtkWidget *widget);
42 static void gtk_ruler_size_allocate (GtkWidget *widget,
43 GtkAllocation *allocation);
44 static gint gtk_ruler_expose (GtkWidget *widget,
45 GdkEventExpose *event);
46 static void gtk_ruler_make_pixmap (GtkRuler *ruler);
47 static void gtk_ruler_set_property (GObject *object,
51 static void gtk_ruler_get_property (GObject *object,
56 static GtkWidgetClass *parent_class;
58 static const GtkRulerMetric ruler_metrics[] =
60 {"Pixels", "Pi", 1.0, { 1, 2, 5, 10, 25, 50, 100, 250, 500, 1000 }, { 1, 5, 10, 50, 100 }},
61 {"Inches", "In", 72.0, { 1, 2, 4, 8, 16, 32, 64, 128, 256, 512 }, { 1, 2, 4, 8, 16 }},
62 {"Centimeters", "Cn", 28.35, { 1, 2, 5, 10, 25, 50, 100, 250, 500, 1000 }, { 1, 5, 10, 50, 100 }},
67 gtk_ruler_get_type (void)
69 static GtkType ruler_type = 0;
73 static const GtkTypeInfo ruler_info =
77 sizeof (GtkRulerClass),
78 (GtkClassInitFunc) gtk_ruler_class_init,
79 (GtkObjectInitFunc) gtk_ruler_init,
80 /* reserved_1 */ NULL,
81 /* reserved_2 */ NULL,
82 (GtkClassInitFunc) NULL,
85 ruler_type = gtk_type_unique (GTK_TYPE_WIDGET, &ruler_info);
92 gtk_ruler_class_init (GtkRulerClass *class)
94 GObjectClass *gobject_class;
95 GtkObjectClass *object_class;
96 GtkWidgetClass *widget_class;
98 gobject_class = G_OBJECT_CLASS (class);
99 object_class = (GtkObjectClass*) class;
100 widget_class = (GtkWidgetClass*) class;
102 parent_class = gtk_type_class (GTK_TYPE_WIDGET);
104 gobject_class->set_property = gtk_ruler_set_property;
105 gobject_class->get_property = gtk_ruler_get_property;
107 widget_class->realize = gtk_ruler_realize;
108 widget_class->unrealize = gtk_ruler_unrealize;
109 widget_class->size_allocate = gtk_ruler_size_allocate;
110 widget_class->expose_event = gtk_ruler_expose;
112 class->draw_ticks = NULL;
113 class->draw_pos = NULL;
115 g_object_class_install_property (gobject_class,
117 g_param_spec_double ("lower",
119 _("Lower limit of ruler"),
125 g_object_class_install_property (gobject_class,
127 g_param_spec_double ("upper",
129 _("Upper limit of ruler"),
135 g_object_class_install_property (gobject_class,
137 g_param_spec_double ("position",
139 _("Position of mark on the ruler"),
145 g_object_class_install_property (gobject_class,
147 g_param_spec_double ("max_size",
149 _("Maximum size of the ruler"),
157 gtk_ruler_init (GtkRuler *ruler)
159 ruler->backing_store = NULL;
160 ruler->non_gr_exp_gc = NULL;
163 ruler->slider_size = 0;
169 gtk_ruler_set_metric (ruler, GTK_PIXELS);
173 gtk_ruler_set_property (GObject *object,
178 GtkRuler *ruler = GTK_RULER (object);
183 gtk_ruler_set_range (ruler, g_value_get_double (value), ruler->upper,
184 ruler->position, ruler->max_size);
187 gtk_ruler_set_range (ruler, ruler->lower, g_value_get_double (value),
188 ruler->position, ruler->max_size);
191 gtk_ruler_set_range (ruler, ruler->lower, ruler->upper,
192 g_value_get_double (value), ruler->max_size);
195 gtk_ruler_set_range (ruler, ruler->lower, ruler->upper,
196 ruler->position, g_value_get_double (value));
202 gtk_ruler_get_property (GObject *object,
207 GtkRuler *ruler = GTK_RULER (object);
212 g_value_set_double (value, ruler->lower);
215 g_value_set_double (value, ruler->upper);
218 g_value_set_double (value, ruler->position);
221 g_value_set_double (value, ruler->max_size);
224 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
230 gtk_ruler_set_metric (GtkRuler *ruler,
231 GtkMetricType metric)
233 g_return_if_fail (GTK_IS_RULER (ruler));
235 ruler->metric = (GtkRulerMetric *) &ruler_metrics[metric];
237 if (GTK_WIDGET_DRAWABLE (ruler))
238 gtk_widget_queue_draw (GTK_WIDGET (ruler));
242 * gtk_ruler_get_metric:
243 * @ruler: a #GtkRuler
245 * Gets the units used for a #GtkRule . See gtk_ruler_set_metric().
247 * Return value: the units currently used for @ruler
250 gtk_ruler_get_metric (GtkRuler *ruler)
254 g_return_val_if_fail (GTK_IS_RULER (ruler), 0);
256 for (i = 0; i < G_N_ELEMENTS (ruler_metrics); i++)
257 if (ruler->metric == &ruler_metrics[i])
260 g_assert_not_reached ();
266 gtk_ruler_set_range (GtkRuler *ruler,
272 g_return_if_fail (GTK_IS_RULER (ruler));
274 if (ruler->lower != lower)
276 ruler->lower = lower;
277 g_object_notify (G_OBJECT (ruler), "lower");
279 if (ruler->upper != upper)
281 ruler->upper = upper;
282 g_object_notify (G_OBJECT (ruler), "upper");
284 if (ruler->position != position)
286 ruler->position = position;
287 g_object_notify (G_OBJECT (ruler), "position");
289 if (ruler->max_size != max_size)
291 ruler->max_size = max_size;
292 g_object_notify (G_OBJECT (ruler), "max_size");
295 if (GTK_WIDGET_DRAWABLE (ruler))
296 gtk_widget_queue_draw (GTK_WIDGET (ruler));
300 * gtk_ruler_get_range:
301 * @ruler: a #GtkRuler
302 * @lower: location to store lower limit of the ruler, or %NULL
303 * @upper: location to store upper limit of the ruler, or %NULL
304 * @position: location to store the current position of the mark on the ruler, or %NULL
305 * @max_size: location to store the maximum size of the ruler used when calculating
306 * the space to leave for the text, or %NULL.
308 * Retrieves values indicating the range and current position of a #GtkRuler.
309 * See gtk_ruler_set_range().
312 gtk_ruler_get_range (GtkRuler *ruler,
318 g_return_if_fail (GTK_IS_RULER (ruler));
321 *lower = ruler->lower;
323 *upper = ruler->upper;
325 *position = ruler->position;
327 *max_size = ruler->max_size;
331 gtk_ruler_draw_ticks (GtkRuler *ruler)
333 g_return_if_fail (GTK_IS_RULER (ruler));
335 if (GTK_RULER_GET_CLASS (ruler)->draw_ticks)
336 GTK_RULER_GET_CLASS (ruler)->draw_ticks (ruler);
340 gtk_ruler_draw_pos (GtkRuler *ruler)
342 g_return_if_fail (GTK_IS_RULER (ruler));
344 if (GTK_RULER_GET_CLASS (ruler)->draw_pos)
345 GTK_RULER_GET_CLASS (ruler)->draw_pos (ruler);
350 gtk_ruler_realize (GtkWidget *widget)
353 GdkWindowAttr attributes;
354 gint attributes_mask;
356 g_return_if_fail (GTK_IS_RULER (widget));
358 ruler = GTK_RULER (widget);
359 GTK_WIDGET_SET_FLAGS (ruler, GTK_REALIZED);
361 attributes.window_type = GDK_WINDOW_CHILD;
362 attributes.x = widget->allocation.x;
363 attributes.y = widget->allocation.y;
364 attributes.width = widget->allocation.width;
365 attributes.height = widget->allocation.height;
366 attributes.wclass = GDK_INPUT_OUTPUT;
367 attributes.visual = gtk_widget_get_visual (widget);
368 attributes.colormap = gtk_widget_get_colormap (widget);
369 attributes.event_mask = gtk_widget_get_events (widget);
370 attributes.event_mask |= (GDK_EXPOSURE_MASK |
371 GDK_POINTER_MOTION_MASK |
372 GDK_POINTER_MOTION_HINT_MASK);
374 attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
376 widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes, attributes_mask);
377 gdk_window_set_user_data (widget->window, ruler);
379 widget->style = gtk_style_attach (widget->style, widget->window);
380 gtk_style_set_background (widget->style, widget->window, GTK_STATE_ACTIVE);
382 gtk_ruler_make_pixmap (ruler);
386 gtk_ruler_unrealize (GtkWidget *widget)
390 g_return_if_fail (GTK_IS_RULER (widget));
392 ruler = GTK_RULER (widget);
394 if (ruler->backing_store)
395 gdk_pixmap_unref (ruler->backing_store);
396 if (ruler->non_gr_exp_gc)
397 gdk_gc_destroy (ruler->non_gr_exp_gc);
399 ruler->backing_store = NULL;
400 ruler->non_gr_exp_gc = NULL;
402 if (GTK_WIDGET_CLASS (parent_class)->unrealize)
403 (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
407 gtk_ruler_size_allocate (GtkWidget *widget,
408 GtkAllocation *allocation)
412 g_return_if_fail (GTK_IS_RULER (widget));
414 ruler = GTK_RULER (widget);
415 widget->allocation = *allocation;
417 if (GTK_WIDGET_REALIZED (widget))
419 gdk_window_move_resize (widget->window,
420 allocation->x, allocation->y,
421 allocation->width, allocation->height);
423 gtk_ruler_make_pixmap (ruler);
428 gtk_ruler_expose (GtkWidget *widget,
429 GdkEventExpose *event)
433 g_return_val_if_fail (GTK_IS_RULER (widget), FALSE);
434 g_return_val_if_fail (event != NULL, FALSE);
436 if (GTK_WIDGET_DRAWABLE (widget))
438 ruler = GTK_RULER (widget);
440 gtk_ruler_draw_ticks (ruler);
442 gdk_draw_pixmap (widget->window,
443 ruler->non_gr_exp_gc,
444 ruler->backing_store,
446 widget->allocation.width,
447 widget->allocation.height);
449 gtk_ruler_draw_pos (ruler);
456 gtk_ruler_make_pixmap (GtkRuler *ruler)
462 widget = GTK_WIDGET (ruler);
464 if (ruler->backing_store)
466 gdk_window_get_size (ruler->backing_store, &width, &height);
467 if ((width == widget->allocation.width) &&
468 (height == widget->allocation.height))
471 gdk_pixmap_unref (ruler->backing_store);
474 ruler->backing_store = gdk_pixmap_new (widget->window,
475 widget->allocation.width,
476 widget->allocation.height,
482 if (!ruler->non_gr_exp_gc)
484 ruler->non_gr_exp_gc = gdk_gc_new (widget->window);
485 gdk_gc_set_exposures (ruler->non_gr_exp_gc, FALSE);