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.
20 #include "gtkcontainer.h"
24 #define SCALE_CLASS(w) GTK_SCALE_CLASS (GTK_OBJECT (w)->klass)
27 static void gtk_scale_class_init (GtkScaleClass *klass);
28 static void gtk_scale_init (GtkScale *scale);
29 static void gtk_scale_map (GtkWidget *widget);
30 static void gtk_scale_unmap (GtkWidget *widget);
32 static void gtk_scale_draw_background (GtkRange *range);
35 static GtkRangeClass *parent_class = NULL;
39 gtk_scale_get_type (void)
41 static GtkType scale_type = 0;
45 GtkTypeInfo scale_info =
49 sizeof (GtkScaleClass),
50 (GtkClassInitFunc) gtk_scale_class_init,
51 (GtkObjectInitFunc) gtk_scale_init,
52 /* reserved_1 */ NULL,
53 /* reserved_2 */ NULL,
54 (GtkClassInitFunc) NULL,
57 scale_type = gtk_type_unique (GTK_TYPE_RANGE, &scale_info);
64 gtk_scale_class_init (GtkScaleClass *class)
66 GtkObjectClass *object_class;
67 GtkWidgetClass *widget_class;
68 GtkRangeClass *range_class;
70 object_class = (GtkObjectClass*) class;
71 range_class = (GtkRangeClass*) class;
72 widget_class = (GtkWidgetClass*) class;
74 parent_class = gtk_type_class (GTK_TYPE_RANGE);
76 widget_class->map = gtk_scale_map;
77 widget_class->unmap = gtk_scale_unmap;
79 range_class->draw_background = gtk_scale_draw_background;
81 class->slider_length = 31;
82 class->value_spacing = 2;
83 class->draw_value = NULL;
87 gtk_scale_init (GtkScale *scale)
89 GTK_WIDGET_SET_FLAGS (scale, GTK_CAN_FOCUS);
90 GTK_WIDGET_SET_FLAGS (scale, GTK_NO_WINDOW);
91 GTK_RANGE (scale)->digits = 1;
92 scale->draw_value = TRUE;
93 scale->value_pos = GTK_POS_TOP;
97 gtk_scale_map (GtkWidget *widget)
101 g_return_if_fail (widget != NULL);
102 g_return_if_fail (GTK_IS_SCALE (widget));
104 GTK_WIDGET_SET_FLAGS (widget, GTK_MAPPED);
105 range = GTK_RANGE (widget);
107 if (GTK_WIDGET_NO_WINDOW (widget))
108 gtk_widget_queue_draw (widget);
110 gdk_window_show (range->trough);
114 gtk_scale_unmap (GtkWidget *widget)
118 g_return_if_fail (widget != NULL);
119 g_return_if_fail (GTK_IS_SCALE (widget));
121 GTK_WIDGET_UNSET_FLAGS (widget, GTK_MAPPED);
122 range = GTK_RANGE (widget);
124 if (GTK_WIDGET_NO_WINDOW (widget))
125 gtk_widget_queue_clear (widget);
127 gdk_window_hide (range->trough);
131 gtk_scale_set_digits (GtkScale *scale,
134 g_return_if_fail (scale != NULL);
135 g_return_if_fail (GTK_IS_SCALE (scale));
137 if (GTK_RANGE (scale)->digits != digits)
139 GTK_RANGE (scale)->digits = digits;
141 if (GTK_WIDGET_VISIBLE (scale) && GTK_WIDGET_MAPPED (scale))
142 gtk_widget_queue_resize (GTK_WIDGET (scale));
147 gtk_scale_set_draw_value (GtkScale *scale,
150 g_return_if_fail (scale != NULL);
151 g_return_if_fail (GTK_IS_SCALE (scale));
153 if (scale->draw_value != draw_value)
155 scale->draw_value = (draw_value != 0);
157 if (GTK_WIDGET_VISIBLE (scale) && GTK_WIDGET_MAPPED (scale))
158 gtk_widget_queue_resize (GTK_WIDGET (scale));
163 gtk_scale_set_value_pos (GtkScale *scale,
166 g_return_if_fail (scale != NULL);
167 g_return_if_fail (GTK_IS_SCALE (scale));
169 if (scale->value_pos != pos)
171 scale->value_pos = pos;
173 if (GTK_WIDGET_VISIBLE (scale) && GTK_WIDGET_MAPPED (scale))
174 gtk_widget_queue_resize (GTK_WIDGET (scale));
179 gtk_scale_get_value_width (GtkScale *scale)
189 g_return_val_if_fail (scale != NULL, 0);
190 g_return_val_if_fail (GTK_IS_SCALE (scale), 0);
193 if (scale->draw_value)
195 range = GTK_RANGE (scale);
197 value = ABS (range->adjustment->lower);
198 if (value == 0) value = 1;
199 digits = log10 (value) + 1;
204 if (range->adjustment->lower < 0)
206 for (j = 0; j < digits; j++)
208 if (GTK_RANGE (scale)->digits)
210 for (j = 0; j < GTK_RANGE (scale)->digits; j++)
214 return_val = gdk_string_measure (GTK_WIDGET (scale)->style->font, buffer);
216 value = ABS (range->adjustment->upper);
217 if (value == 0) value = 1;
218 digits = log10 (value) + 1;
223 if (range->adjustment->lower < 0)
225 for (j = 0; j < digits; j++)
227 if (GTK_RANGE (scale)->digits)
229 for (j = 0; j < GTK_RANGE (scale)->digits; j++)
233 temp = gdk_string_measure (GTK_WIDGET (scale)->style->font, buffer);
234 return_val = MAX (return_val, temp);
241 gtk_scale_draw_value (GtkScale *scale)
243 g_return_if_fail (scale != NULL);
244 g_return_if_fail (GTK_IS_SCALE (scale));
246 if (SCALE_CLASS (scale)->draw_value)
247 (* SCALE_CLASS (scale)->draw_value) (scale);
252 gtk_scale_draw_background (GtkRange *range)
254 g_return_if_fail (range != NULL);
255 g_return_if_fail (GTK_IS_SCALE (range));
257 gtk_scale_draw_value (GTK_SCALE (range));