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 3 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, see <http://www.gnu.org/licenses/>.
19 /* I derived this class from hruler. S in HRuler could be read as
20 * Sylpheed (sylpheed.good-day.net), but also [S]ettable HRuler.
21 * I basically ripped apart the draw_ticks member of HRuler; it
22 * now draws the ticks at ruler->max_size. so gtk_ruler_set_range's
23 * last parameter has the distance between two ticks (which is
24 * the width of the fixed font character!
33 #include "gtkshruler.h"
36 #define RULER_HEIGHT 14
37 #define MINIMUM_INCR 5
38 #define MAXIMUM_SUBDIVIDE 5
39 #define MAXIMUM_SCALES 10
41 #define ROUND(x) ((int) ((x) + 0.5))
43 static void gtk_shruler_class_init (GtkSHRulerClass *klass);
44 static void gtk_shruler_init (GtkSHRuler *hruler);
45 static void gtk_shruler_draw_ticks (GtkRuler *ruler);
48 gtk_shruler_get_type(void)
50 static GType shruler_type = 0;
52 if ( !shruler_type ) {
53 static const GTypeInfo shruler_info = {
54 sizeof (GtkSHRulerClass),
57 (GBaseFinalizeFunc) NULL,
59 (GClassInitFunc) gtk_shruler_class_init,
60 (GClassFinalizeFunc) NULL,
61 NULL, /* class_data */
65 (GInstanceInitFunc) gtk_shruler_init,
67 /* inherit from GtkHRuler */
68 shruler_type = g_type_register_static (GTK_TYPE_HRULER, "GtkSHRuler", &shruler_info, (GTypeFlags)0);
74 gtk_shruler_class_init(GtkSHRulerClass * klass)
76 GtkWidgetClass * widget_class;
77 GtkRulerClass * hruler_class;
79 widget_class = GTK_WIDGET_CLASS(klass);
80 hruler_class = GTK_RULER_CLASS(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->xthickness * 2 + 1;
103 widget->requisition.height = widget->style->ythickness * 2 + RULER_HEIGHT;
108 gtk_shruler_new(void)
110 return GTK_WIDGET( g_object_new( gtk_shruler_get_type(), NULL ) );
114 gtk_shruler_draw_ticks(GtkRuler *ruler)
124 cm_return_if_fail (ruler != NULL);
125 cm_return_if_fail (GTK_IS_HRULER (ruler));
127 if (!GTK_WIDGET_DRAWABLE (ruler))
130 widget = GTK_WIDGET (ruler);
132 gc = widget->style->fg_gc[GTK_STATE_NORMAL];
133 bg_gc = widget->style->bg_gc[GTK_STATE_NORMAL];
135 xthickness = widget->style->xthickness;
136 ythickness = widget->style->ythickness;
138 width = widget->allocation.width;
139 height = widget->allocation.height - ythickness * 2;
141 gtk_paint_box (widget->style, ruler->backing_store,
142 GTK_STATE_NORMAL, GTK_SHADOW_OUT,
143 NULL, widget, "hruler",
145 widget->allocation.width, widget->allocation.height);
147 /* assume ruler->max_size has the char width */
148 /* i is increment of char_width, pos is label number
149 * y position is based on height of widget itself */
150 for ( i = 0, pos = 0; i < widget->allocation.width - xthickness; i += ruler->max_size, pos++ ) {
151 gint length = height / 8;
153 if ( pos % 10 == 0 ) length = ( 2 * height / 3 );
154 else if ( pos % 5 == 0 ) length = ( height / 3 );
156 gdk_draw_line(ruler->backing_store, gc,
157 i, height + ythickness,
160 if ( pos % 10 == 0 ) {
165 g_snprintf(buf, sizeof buf, "%d", pos);
167 layout = gtk_widget_create_pango_layout
168 (GTK_WIDGET(ruler), buf);
170 gdk_draw_layout(ruler->backing_store, gc, i + 2,
173 g_object_unref(layout);