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.
21 * Modified by the GTK+ Team and others 1997-1999. See the AUTHORS
22 * file for a list of people on the GTK+ Team. See the ChangeLog
23 * files for a list of changes. These files are distributed with
24 * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
27 /* modified by andreas meyer <hexx3000@gmx.de> */
28 /* subsequently specialized for audio time displays by paul davis <paul@linuxaudiosystems.com> */
33 #include "gtk-custom-hruler.h"
35 #define RULER_HEIGHT 14
36 #define MINIMUM_INCR 5
37 #define MAXIMUM_SUBDIVIDE 5
39 #define ROUND(x) ((int) ((x) + 0.5))
41 static void gtk_custom_hruler_class_init (GtkCustomHRulerClass * klass);
42 static void gtk_custom_hruler_init (GtkCustomHRuler * custom_hruler);
43 static gint gtk_custom_hruler_motion_notify (GtkWidget * widget, GdkEventMotion * event);
44 static void gtk_custom_hruler_draw_ticks (GtkCustomRuler * ruler);
45 static void gtk_custom_hruler_draw_pos (GtkCustomRuler * ruler);
47 GType gtk_custom_hruler_get_type (void)
49 static GType hruler_type = 0;
52 static const GTypeInfo hruler_info =
54 sizeof (GtkCustomHRulerClass),
56 NULL, /* base_finalize */
57 (GClassInitFunc) gtk_custom_hruler_class_init,
58 NULL, /* class_finalize */
59 NULL, /* class_data */
60 sizeof (GtkCustomHRuler),
62 (GInstanceInitFunc) gtk_custom_hruler_init,
63 NULL /* value_table */
66 hruler_type = g_type_register_static (gtk_custom_ruler_get_type(), "GtkCustomHRuler",
67 &hruler_info, (GTypeFlags)0);
74 gtk_custom_hruler_class_init (GtkCustomHRulerClass * klass)
76 GtkWidgetClass *widget_class;
77 GtkCustomRulerClass *ruler_class;
79 widget_class = (GtkWidgetClass *) klass;
80 ruler_class = (GtkCustomRulerClass *) klass;
82 widget_class->motion_notify_event = gtk_custom_hruler_motion_notify;
84 ruler_class->draw_ticks = gtk_custom_hruler_draw_ticks;
85 ruler_class->draw_pos = gtk_custom_hruler_draw_pos;
89 gtk_custom_hruler_init (GtkCustomHRuler * custom_hruler)
93 widget = GTK_WIDGET (custom_hruler);
94 widget->requisition.width = widget->style->xthickness * 2 + 1;
95 widget->requisition.height = widget->style->ythickness * 2 + RULER_HEIGHT;
100 gtk_custom_hruler_new (void)
102 return GTK_WIDGET (gtk_type_new (gtk_custom_hruler_get_type ()));
106 gtk_custom_hruler_motion_notify (GtkWidget * widget, GdkEventMotion * event)
108 GtkCustomRuler *ruler;
111 g_return_val_if_fail (widget != NULL, FALSE);
112 g_return_val_if_fail (GTK_IS_CUSTOM_HRULER (widget), FALSE);
113 g_return_val_if_fail (event != NULL, FALSE);
115 ruler = GTK_CUSTOM_RULER (widget);
118 gdk_window_get_pointer (widget->window, &x, NULL, NULL);
122 ruler->position = ruler->lower + ((ruler->upper - ruler->lower) * x) / widget->allocation.width;
124 /* Make sure the ruler has been allocated already */
125 if (ruler->backing_store != NULL)
126 gtk_custom_ruler_draw_pos (ruler);
132 gtk_custom_hruler_draw_ticks (GtkCustomRuler * ruler)
137 GtkCustomRulerMark *marks;
143 PangoRectangle logical_rect, ink_rect;
145 g_return_if_fail (ruler != NULL);
146 g_return_if_fail (GTK_IS_CUSTOM_HRULER (ruler));
148 if (!GTK_WIDGET_DRAWABLE (ruler))
151 widget = GTK_WIDGET (ruler);
153 gc = widget->style->fg_gc[GTK_STATE_NORMAL];
155 layout = gtk_widget_create_pango_layout (widget, "012456789");
156 pango_layout_get_extents (layout, &ink_rect, &logical_rect);
158 digit_offset = ink_rect.y;
160 ythickness = widget->style->ythickness;
162 gtk_paint_box (widget->style, ruler->backing_store,
163 GTK_STATE_NORMAL, GTK_SHADOW_NONE,
164 NULL, widget, "custom_hruler", 0, 0, widget->allocation.width, widget->allocation.height);
166 gdk_draw_line (ruler->backing_store, gc, 0, widget->allocation.height - 1,
167 widget->allocation.width, widget->allocation.height - 1);
169 if ((ruler->upper - ruler->lower) == 0) {
173 /* we have to assume a fixed width font here */
175 max_chars = widget->allocation.width / 12; // XXX FIX ME: pixel with of the char `8'
177 nmarks = ruler->metric->get_marks (&marks, ruler->lower, ruler->upper, max_chars);
179 for (i = 0; i < nmarks; i++) {
183 pos = ROUND ((marks[i].position - ruler->lower) / ruler->metric->units_per_pixel);
184 height = widget->allocation.height;
186 switch (marks[i].style) {
187 case GtkCustomRulerMarkMajor:
188 gdk_draw_line (ruler->backing_store, gc, pos, height, pos, 0);
190 case GtkCustomRulerMarkMinor:
191 gdk_draw_line (ruler->backing_store, gc, pos, height, pos, height - (height/2));
193 case GtkCustomRulerMarkMicro:
194 gdk_draw_line (ruler->backing_store, gc, pos, height, pos, height - 3);
198 pango_layout_set_text (layout, marks[i].label, -1);
199 pango_layout_get_extents (layout, &logical_rect, NULL);
201 gtk_paint_layout (widget->style,
202 ruler->backing_store,
203 GTK_WIDGET_STATE (widget),
208 pos + 2, ythickness + PANGO_PIXELS (logical_rect.y - digit_offset),
211 g_free (marks[i].label);
218 g_object_unref (layout);
222 gtk_custom_hruler_draw_pos (GtkCustomRuler * ruler)
229 gint bs_width, bs_height;
234 g_return_if_fail (ruler != NULL);
235 g_return_if_fail (GTK_IS_CUSTOM_HRULER (ruler));
236 if (GTK_WIDGET_DRAWABLE (ruler) && (ruler->upper - ruler->lower) > 0) {
237 widget = GTK_WIDGET (ruler);
238 gc = widget->style->fg_gc[GTK_STATE_NORMAL];
239 xthickness = widget->style->xthickness;
240 ythickness = widget->style->ythickness;
241 width = widget->allocation.width;
242 height = widget->allocation.height - ythickness * 2;
244 bs_width = height / 2;
245 bs_width |= 1; /* make sure it's odd */
246 bs_height = bs_width / 2 + 1;
248 if ((bs_width > 0) && (bs_height > 0)) {
249 /* If a backing store exists, restore the ruler */
250 if (ruler->backing_store && ruler->non_gr_exp_gc)
251 gdk_draw_drawable (ruler->widget.window,
252 ruler->non_gr_exp_gc,
253 GDK_DRAWABLE(ruler->backing_store), ruler->xsrc, ruler->ysrc, ruler->xsrc, ruler->ysrc, bs_width, bs_height);
255 increment = (gfloat) width / (ruler->upper - ruler->lower);
256 x = ROUND ((ruler->position - ruler->lower) * increment) + (xthickness - bs_width) / 2 - 1;
257 y = (height + bs_height) / 2 + ythickness;
259 for (i = 0; i < bs_height; i++)
260 gdk_draw_line (widget->window, gc, x + i, y + i, x + bs_width - 1 - i, y + i);