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/.
29 #include "gtkprivate.h"
42 static void gtk_ruler_realize (GtkWidget *widget);
43 static void gtk_ruler_unrealize (GtkWidget *widget);
44 static void gtk_ruler_size_allocate (GtkWidget *widget,
45 GtkAllocation *allocation);
46 static gint gtk_ruler_expose (GtkWidget *widget,
47 GdkEventExpose *event);
48 static void gtk_ruler_make_pixmap (GtkRuler *ruler);
49 static void gtk_ruler_set_property (GObject *object,
53 static void gtk_ruler_get_property (GObject *object,
58 static const GtkRulerMetric ruler_metrics[] =
60 { "Pixel", "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 }},
65 G_DEFINE_TYPE (GtkRuler, gtk_ruler, GTK_TYPE_WIDGET)
68 gtk_ruler_class_init (GtkRulerClass *class)
70 GObjectClass *gobject_class;
71 GtkWidgetClass *widget_class;
73 gobject_class = G_OBJECT_CLASS (class);
74 widget_class = (GtkWidgetClass*) class;
76 gobject_class->set_property = gtk_ruler_set_property;
77 gobject_class->get_property = gtk_ruler_get_property;
79 widget_class->realize = gtk_ruler_realize;
80 widget_class->unrealize = gtk_ruler_unrealize;
81 widget_class->size_allocate = gtk_ruler_size_allocate;
82 widget_class->expose_event = gtk_ruler_expose;
84 class->draw_ticks = NULL;
85 class->draw_pos = NULL;
87 g_object_class_install_property (gobject_class,
89 g_param_spec_double ("lower",
91 P_("Lower limit of ruler"),
95 GTK_PARAM_READWRITE));
97 g_object_class_install_property (gobject_class,
99 g_param_spec_double ("upper",
101 P_("Upper limit of ruler"),
105 GTK_PARAM_READWRITE));
107 g_object_class_install_property (gobject_class,
109 g_param_spec_double ("position",
111 P_("Position of mark on the ruler"),
115 GTK_PARAM_READWRITE));
117 g_object_class_install_property (gobject_class,
119 g_param_spec_double ("max-size",
121 P_("Maximum size of the ruler"),
125 GTK_PARAM_READWRITE));
129 * The metric used for the ruler.
133 g_object_class_install_property (gobject_class,
135 g_param_spec_enum ("metric",
137 P_("The metric used for the ruler"),
138 GTK_TYPE_METRIC_TYPE,
140 GTK_PARAM_READWRITE));
144 gtk_ruler_init (GtkRuler *ruler)
146 ruler->backing_store = NULL;
149 ruler->slider_size = 0;
155 gtk_ruler_set_metric (ruler, GTK_PIXELS);
159 gtk_ruler_set_property (GObject *object,
164 GtkRuler *ruler = GTK_RULER (object);
169 gtk_ruler_set_range (ruler, g_value_get_double (value), ruler->upper,
170 ruler->position, ruler->max_size);
173 gtk_ruler_set_range (ruler, ruler->lower, g_value_get_double (value),
174 ruler->position, ruler->max_size);
177 gtk_ruler_set_range (ruler, ruler->lower, ruler->upper,
178 g_value_get_double (value), ruler->max_size);
181 gtk_ruler_set_range (ruler, ruler->lower, ruler->upper,
182 ruler->position, g_value_get_double (value));
185 gtk_ruler_set_metric (ruler, g_value_get_enum (value));
188 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
194 gtk_ruler_get_property (GObject *object,
199 GtkRuler *ruler = GTK_RULER (object);
204 g_value_set_double (value, ruler->lower);
207 g_value_set_double (value, ruler->upper);
210 g_value_set_double (value, ruler->position);
213 g_value_set_double (value, ruler->max_size);
216 g_value_set_enum (value, gtk_ruler_get_metric (ruler));
219 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
225 gtk_ruler_set_metric (GtkRuler *ruler,
226 GtkMetricType metric)
228 g_return_if_fail (GTK_IS_RULER (ruler));
230 ruler->metric = (GtkRulerMetric *) &ruler_metrics[metric];
232 if (GTK_WIDGET_DRAWABLE (ruler))
233 gtk_widget_queue_draw (GTK_WIDGET (ruler));
235 g_object_notify (G_OBJECT (ruler), "metric");
239 * gtk_ruler_get_metric:
240 * @ruler: a #GtkRuler
242 * Gets the units used for a #GtkRuler. See gtk_ruler_set_metric().
244 * Return value: the units currently used for @ruler
247 gtk_ruler_get_metric (GtkRuler *ruler)
251 g_return_val_if_fail (GTK_IS_RULER (ruler), 0);
253 for (i = 0; i < G_N_ELEMENTS (ruler_metrics); i++)
254 if (ruler->metric == &ruler_metrics[i])
257 g_assert_not_reached ();
263 gtk_ruler_set_range (GtkRuler *ruler,
269 g_return_if_fail (GTK_IS_RULER (ruler));
271 g_object_freeze_notify (G_OBJECT (ruler));
272 if (ruler->lower != lower)
274 ruler->lower = lower;
275 g_object_notify (G_OBJECT (ruler), "lower");
277 if (ruler->upper != upper)
279 ruler->upper = upper;
280 g_object_notify (G_OBJECT (ruler), "upper");
282 if (ruler->position != position)
284 ruler->position = position;
285 g_object_notify (G_OBJECT (ruler), "position");
287 if (ruler->max_size != max_size)
289 ruler->max_size = max_size;
290 g_object_notify (G_OBJECT (ruler), "max-size");
292 g_object_thaw_notify (G_OBJECT (ruler));
294 if (GTK_WIDGET_DRAWABLE (ruler))
295 gtk_widget_queue_draw (GTK_WIDGET (ruler));
299 * gtk_ruler_get_range:
300 * @ruler: a #GtkRuler
301 * @lower: location to store lower limit of the ruler, or %NULL
302 * @upper: location to store upper limit of the ruler, or %NULL
303 * @position: location to store the current position of the mark on the ruler, or %NULL
304 * @max_size: location to store the maximum size of the ruler used when calculating
305 * the space to leave for the text, or %NULL.
307 * Retrieves values indicating the range and current position of a #GtkRuler.
308 * See gtk_ruler_set_range().
311 gtk_ruler_get_range (GtkRuler *ruler,
317 g_return_if_fail (GTK_IS_RULER (ruler));
320 *lower = ruler->lower;
322 *upper = ruler->upper;
324 *position = ruler->position;
326 *max_size = ruler->max_size;
330 gtk_ruler_draw_ticks (GtkRuler *ruler)
332 g_return_if_fail (GTK_IS_RULER (ruler));
334 if (GTK_RULER_GET_CLASS (ruler)->draw_ticks)
335 GTK_RULER_GET_CLASS (ruler)->draw_ticks (ruler);
339 gtk_ruler_draw_pos (GtkRuler *ruler)
341 g_return_if_fail (GTK_IS_RULER (ruler));
343 if (GTK_RULER_GET_CLASS (ruler)->draw_pos)
344 GTK_RULER_GET_CLASS (ruler)->draw_pos (ruler);
349 gtk_ruler_realize (GtkWidget *widget)
352 GdkWindowAttr attributes;
353 gint attributes_mask;
355 ruler = GTK_RULER (widget);
356 GTK_WIDGET_SET_FLAGS (ruler, GTK_REALIZED);
358 attributes.window_type = GDK_WINDOW_CHILD;
359 attributes.x = widget->allocation.x;
360 attributes.y = widget->allocation.y;
361 attributes.width = widget->allocation.width;
362 attributes.height = widget->allocation.height;
363 attributes.wclass = GDK_INPUT_OUTPUT;
364 attributes.visual = gtk_widget_get_visual (widget);
365 attributes.colormap = gtk_widget_get_colormap (widget);
366 attributes.event_mask = gtk_widget_get_events (widget);
367 attributes.event_mask |= (GDK_EXPOSURE_MASK |
368 GDK_POINTER_MOTION_MASK |
369 GDK_POINTER_MOTION_HINT_MASK);
371 attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
373 widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes, attributes_mask);
374 gdk_window_set_user_data (widget->window, ruler);
376 widget->style = gtk_style_attach (widget->style, widget->window);
377 gtk_style_set_background (widget->style, widget->window, GTK_STATE_ACTIVE);
379 gtk_ruler_make_pixmap (ruler);
383 gtk_ruler_unrealize (GtkWidget *widget)
385 GtkRuler *ruler = GTK_RULER (widget);
387 if (ruler->backing_store)
389 g_object_unref (ruler->backing_store);
390 ruler->backing_store = NULL;
393 if (ruler->non_gr_exp_gc)
395 g_object_unref (ruler->non_gr_exp_gc);
396 ruler->non_gr_exp_gc = NULL;
399 if (GTK_WIDGET_CLASS (gtk_ruler_parent_class)->unrealize)
400 (* GTK_WIDGET_CLASS (gtk_ruler_parent_class)->unrealize) (widget);
404 gtk_ruler_size_allocate (GtkWidget *widget,
405 GtkAllocation *allocation)
407 GtkRuler *ruler = GTK_RULER (widget);
409 widget->allocation = *allocation;
411 if (GTK_WIDGET_REALIZED (widget))
413 gdk_window_move_resize (widget->window,
414 allocation->x, allocation->y,
415 allocation->width, allocation->height);
417 gtk_ruler_make_pixmap (ruler);
422 gtk_ruler_expose (GtkWidget *widget,
423 GdkEventExpose *event)
427 if (GTK_WIDGET_DRAWABLE (widget))
429 ruler = GTK_RULER (widget);
431 gtk_ruler_draw_ticks (ruler);
433 gdk_draw_drawable (widget->window,
434 ruler->non_gr_exp_gc,
435 ruler->backing_store,
437 widget->allocation.width,
438 widget->allocation.height);
440 gtk_ruler_draw_pos (ruler);
447 gtk_ruler_make_pixmap (GtkRuler *ruler)
453 widget = GTK_WIDGET (ruler);
455 if (ruler->backing_store)
457 gdk_drawable_get_size (ruler->backing_store, &width, &height);
458 if ((width == widget->allocation.width) &&
459 (height == widget->allocation.height))
462 g_object_unref (ruler->backing_store);
465 ruler->backing_store = gdk_pixmap_new (widget->window,
466 widget->allocation.width,
467 widget->allocation.height,
473 if (!ruler->non_gr_exp_gc)
475 ruler->non_gr_exp_gc = gdk_gc_new (widget->window);
476 gdk_gc_set_exposures (ruler->non_gr_exp_gc, FALSE);
480 #define __GTK_RULER_C__
481 #include "gtkaliasdef.c"