3 * Copyright (C) 2000-2005 Alfons Hoogervorst & The Sylpheed Claws 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);
48 static void gtk_shruler_draw_pos (GtkRuler *ruler);
52 gtk_shruler_get_type(void)
54 static GType shruler_type = 0;
56 if ( !shruler_type ) {
57 static const GTypeInfo shruler_info = {
58 sizeof (GtkSHRulerClass),
61 (GBaseFinalizeFunc) NULL,
63 (GClassInitFunc) gtk_shruler_class_init,
64 (GClassFinalizeFunc) NULL,
65 NULL, /* class_data */
69 (GInstanceInitFunc) gtk_shruler_init,
71 /* inherit from GtkHRuler */
72 shruler_type = g_type_register_static (GTK_TYPE_HRULER, "GtkSHRuler", &shruler_info, (GTypeFlags)0);
78 gtk_shruler_class_init(GtkSHRulerClass * klass)
80 GtkWidgetClass * widget_class;
81 GtkRulerClass * hruler_class;
83 widget_class = (GtkWidgetClass*) klass;
84 hruler_class = (GtkRulerClass*) klass;
86 /* just neglect motion notify events */
87 widget_class->motion_notify_event = NULL /* gtk_shruler_motion_notify */;
89 /* we want the old ruler draw ticks... */
90 /* ruler_class->draw_ticks = gtk_hruler_draw_ticks; */
91 hruler_class->draw_ticks = gtk_shruler_draw_ticks;
93 /* unimplemented draw pos */
94 hruler_class->draw_pos = NULL;
96 hruler_class->draw_pos = gtk_shruler_draw_pos;
101 gtk_shruler_init (GtkSHRuler * shruler)
105 widget = GTK_WIDGET (shruler);
106 widget->requisition.width = widget->style->xthickness * 2 + 1;
107 widget->requisition.height = widget->style->ythickness * 2 + RULER_HEIGHT;
112 gtk_shruler_new(void)
114 return GTK_WIDGET( g_object_new( gtk_shruler_get_type(), NULL ) );
118 gtk_shruler_draw_ticks(GtkRuler *ruler)
128 g_return_if_fail (ruler != NULL);
129 g_return_if_fail (GTK_IS_HRULER (ruler));
131 if (!GTK_WIDGET_DRAWABLE (ruler))
134 widget = GTK_WIDGET (ruler);
136 gc = widget->style->fg_gc[GTK_STATE_NORMAL];
137 bg_gc = widget->style->bg_gc[GTK_STATE_NORMAL];
139 xthickness = widget->style->xthickness;
140 ythickness = widget->style->ythickness;
142 width = widget->allocation.width;
143 height = widget->allocation.height - ythickness * 2;
145 gtk_paint_box (widget->style, ruler->backing_store,
146 GTK_STATE_NORMAL, GTK_SHADOW_OUT,
147 NULL, widget, "hruler",
149 widget->allocation.width, widget->allocation.height);
152 gdk_draw_line (ruler->backing_store, gc,
155 widget->allocation.width - xthickness,
156 height + ythickness);
159 /* assume ruler->max_size has the char width */
160 /* i is increment of char_width, pos is label number
161 * y position is based on height of widget itself */
162 for ( i = 0, pos = 0; i < widget->allocation.width - xthickness; i += ruler->max_size, pos++ ) {
163 gint length = height / 8;
165 if ( pos % 10 == 0 ) length = ( 2 * height / 3 );
166 else if ( pos % 5 == 0 ) length = ( height / 3 );
168 gdk_draw_line(ruler->backing_store, gc,
169 i, height + ythickness,
172 if ( pos % 10 == 0 ) {
177 g_snprintf(buf, sizeof buf, "%d", pos);
179 layout = gtk_widget_create_pango_layout
180 (GTK_WIDGET(ruler), buf);
182 gdk_draw_layout(ruler->backing_store, gc, i + 2,
185 g_object_unref(layout);
190 /* gtk_ruler_set_pos() - does not work yet, need to reimplement
191 * gtk_ruler_draw_pos(). */
193 gtk_shruler_set_pos(GtkSHRuler * ruler, gfloat pos)
196 g_return_if_fail( ruler != NULL );
198 ruler_ = GTK_RULER(ruler);
200 if ( pos < ruler_->lower )
202 if ( pos > ruler_->upper )
205 ruler_->position = pos;
207 /* Make sure the ruler has been allocated already */
208 if ( ruler_->backing_store != NULL )
209 gtk_ruler_draw_pos(ruler_);