3 * Copyright (C) 2000 Alfons Hoogervorst
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
15 * You should have received a copy of the GNU Library General Public
16 * License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 * Boston, MA 02111-1307, USA.
21 /* I derived this class from hruler. S in HRuler could be read as
22 * Sylpheed (sylpheed.good-day.net), but also [S]ettable HRuler.
23 * I basically ripped apart the draw_ticks member of HRuler; it
24 * now draws the ticks at ruler->max_size. so gtk_ruler_set_range's
25 * last parameter has the distance between two ticks (which is
26 * the width of the fixed font character!
28 * -- Alfons (alfons@proteus.demon.nl)
34 #include <gtk/gtkhruler.h>
35 #include "gtkshruler.h"
37 #define RULER_HEIGHT 14
38 #define MINIMUM_INCR 5
39 #define MAXIMUM_SUBDIVIDE 5
40 #define MAXIMUM_SCALES 10
42 #define ROUND(x) ((int) ((x) + 0.5))
44 static void gtk_shruler_class_init (GtkSHRulerClass *klass);
45 static void gtk_shruler_init (GtkSHRuler *hruler);
46 static void gtk_shruler_draw_ticks (GtkRuler *ruler);
48 static void gtk_shruler_draw_pos (GtkRuler *ruler);
52 gtk_shruler_get_type(void)
54 static guint shruler_type = 0;
56 if ( !shruler_type ) {
57 static const GtkTypeInfo shruler_info = {
60 sizeof (GtkSHRulerClass),
61 (GtkClassInitFunc) gtk_shruler_class_init,
62 (GtkObjectInitFunc) gtk_shruler_init,
63 /* reserved_1 */ NULL,
64 /* reserved_2 */ NULL,
65 (GtkClassInitFunc) NULL,
67 /* inherit from GtkHRuler */
68 shruler_type = gtk_type_unique( gtk_hruler_get_type (), &shruler_info );
74 gtk_shruler_class_init(GtkSHRulerClass * klass)
76 GtkWidgetClass * widget_class;
77 GtkRulerClass * hruler_class;
79 widget_class = (GtkWidgetClass*) klass;
80 hruler_class = (GtkRulerClass*) klass;
82 /* just neglect motion notify events */
83 widget_class->motion_notify_event = NULL /* gtk_shruler_motion_notify */;
85 /* we want the old ruler draw ticks... */
86 /* ruler_class->draw_ticks = gtk_hruler_draw_ticks; */
87 hruler_class->draw_ticks = gtk_shruler_draw_ticks;
89 /* unimplemented draw pos */
90 hruler_class->draw_pos = NULL;
92 hruler_class->draw_pos = gtk_shruler_draw_pos;
97 gtk_shruler_init (GtkSHRuler * shruler)
101 widget = GTK_WIDGET (shruler);
102 widget->requisition.width = widget->style->klass->xthickness * 2 + 1;
103 widget->requisition.height = widget->style->klass->ythickness * 2 + RULER_HEIGHT;
108 gtk_shruler_new(void)
110 return GTK_WIDGET( gtk_type_new( gtk_shruler_get_type() ) );
114 gtk_shruler_draw_ticks(GtkRuler *ruler)
125 g_return_if_fail (ruler != NULL);
126 g_return_if_fail (GTK_IS_HRULER (ruler));
128 if (!GTK_WIDGET_DRAWABLE (ruler))
131 widget = GTK_WIDGET (ruler);
133 gc = widget->style->fg_gc[GTK_STATE_NORMAL];
134 bg_gc = widget->style->bg_gc[GTK_STATE_NORMAL];
135 font = widget->style->font;
137 xthickness = widget->style->klass->xthickness;
138 ythickness = widget->style->klass->ythickness;
140 width = widget->allocation.width;
141 height = widget->allocation.height - ythickness * 2;
143 gtk_paint_box (widget->style, ruler->backing_store,
144 GTK_STATE_NORMAL, GTK_SHADOW_OUT,
145 NULL, widget, "hruler",
147 widget->allocation.width, widget->allocation.height);
150 gdk_draw_line (ruler->backing_store, gc,
153 widget->allocation.width - xthickness,
154 height + ythickness);
157 /* assume ruler->max_size has the char width */
158 /* i is increment of char_width, pos is label number */
159 for ( i = 0, pos = 0; i < widget->allocation.width - xthickness; i += ruler->max_size, pos++ ) {
160 int length = ythickness / 2;
162 if ( pos % 10 == 0 ) length = ( 4 * ythickness );
163 else if (pos % 5 == 0 ) length = ( 2 * ythickness );
165 gdk_draw_line(ruler->backing_store, gc,
166 i, height + ythickness,
169 if ( pos % 10 == 0 ) {
172 sprintf(buf, "%d", (int) pos);
173 gdk_draw_string(ruler->backing_store, font, gc,
174 i + 2, ythickness + font->ascent - 1,
180 /* gtk_ruler_set_pos() - does not work yet, need to reimplement
181 * gtk_ruler_draw_pos(). */
183 gtk_shruler_set_pos(GtkSHRuler * ruler, gfloat pos)
186 g_return_if_fail( ruler != NULL );
188 ruler_ = GTK_RULER(ruler);
190 if ( pos < ruler_->lower )
192 if ( pos > ruler_->upper )
195 ruler_->position = pos;
197 /* Make sure the ruler has been allocated already */
198 if ( ruler_->backing_store != NULL )
199 gtk_ruler_draw_pos(ruler_);