3 * Copyright (C) 2000-2005 Alfons Hoogervorst & The Claws Mail Team
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!
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);
49 gtk_shruler_get_type(void)
51 static GType shruler_type = 0;
53 if ( !shruler_type ) {
54 static const GTypeInfo shruler_info = {
55 sizeof (GtkSHRulerClass),
58 (GBaseFinalizeFunc) NULL,
60 (GClassInitFunc) gtk_shruler_class_init,
61 (GClassFinalizeFunc) NULL,
62 NULL, /* class_data */
66 (GInstanceInitFunc) gtk_shruler_init,
68 /* inherit from GtkHRuler */
69 shruler_type = g_type_register_static (GTK_TYPE_HRULER, "GtkSHRuler", &shruler_info, (GTypeFlags)0);
75 gtk_shruler_class_init(GtkSHRulerClass * klass)
77 GtkWidgetClass * widget_class;
78 GtkRulerClass * hruler_class;
80 widget_class = GTK_WIDGET_CLASS(klass);
81 hruler_class = GTK_RULER_CLASS(klass);
83 /* just neglect motion notify events */
84 widget_class->motion_notify_event = NULL /* gtk_shruler_motion_notify */;
86 /* we want the old ruler draw ticks... */
87 /* ruler_class->draw_ticks = gtk_hruler_draw_ticks; */
88 hruler_class->draw_ticks = gtk_shruler_draw_ticks;
90 /* unimplemented draw pos */
91 hruler_class->draw_pos = NULL;
93 hruler_class->draw_pos = gtk_shruler_draw_pos;
98 gtk_shruler_init (GtkSHRuler * shruler)
102 widget = GTK_WIDGET (shruler);
103 widget->requisition.width = widget->style->xthickness * 2 + 1;
104 widget->requisition.height = widget->style->ythickness * 2 + RULER_HEIGHT;
109 gtk_shruler_new(void)
111 return GTK_WIDGET( g_object_new( gtk_shruler_get_type(), NULL ) );
115 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];
136 xthickness = widget->style->xthickness;
137 ythickness = widget->style->ythickness;
139 width = widget->allocation.width;
140 height = widget->allocation.height - ythickness * 2;
142 gtk_paint_box (widget->style, ruler->backing_store,
143 GTK_STATE_NORMAL, GTK_SHADOW_OUT,
144 NULL, widget, "hruler",
146 widget->allocation.width, widget->allocation.height);
148 /* assume ruler->max_size has the char width */
149 /* i is increment of char_width, pos is label number
150 * y position is based on height of widget itself */
151 for ( i = 0, pos = 0; i < widget->allocation.width - xthickness; i += ruler->max_size, pos++ ) {
152 gint length = height / 8;
154 if ( pos % 10 == 0 ) length = ( 2 * height / 3 );
155 else if ( pos % 5 == 0 ) length = ( height / 3 );
157 gdk_draw_line(ruler->backing_store, gc,
158 i, height + ythickness,
161 if ( pos % 10 == 0 ) {
166 g_snprintf(buf, sizeof buf, "%d", pos);
168 layout = gtk_widget_create_pango_layout
169 (GTK_WIDGET(ruler), buf);
171 gdk_draw_layout(ruler->backing_store, gc, i + 2,
174 g_object_unref(layout);
179 /* gtk_ruler_set_pos() - does not work yet, need to reimplement
180 * gtk_ruler_draw_pos(). */
182 gtk_shruler_set_pos(GtkSHRuler * ruler, gfloat pos)
185 g_return_if_fail( ruler != NULL );
187 ruler_ = GTK_RULER(ruler);
189 if ( pos < ruler_->lower )
191 if ( pos > ruler_->upper )
194 ruler_->position = pos;
196 /* Make sure the ruler has been allocated already */
197 if ( ruler_->backing_store != NULL )
198 gtk_ruler_draw_pos(ruler_);