246 lines
7.0 KiB
C
246 lines
7.0 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/*
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* Modified by the GTK+ Team and others 1997-1999. See the AUTHORS
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* file for a list of people on the GTK+ Team. See the ChangeLog
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* files for a list of changes. These files are distributed with
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* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
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*/
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/* modified by andreas meyer <hexx3000@gmx.de> */
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/* subsequently specialized for audio time displays by paul davis <paul@linuxaudiosystems.com> */
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#include <math.h>
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#include <stdio.h>
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#include <string.h>
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#include "gtk-custom-hruler.h"
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#define RULER_HEIGHT 14
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#define MINIMUM_INCR 5
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#define MAXIMUM_SUBDIVIDE 5
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#define ROUND(x) ((int) ((x) + 0.5))
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static void gtk_custom_hruler_class_init (GtkCustomHRulerClass * klass);
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static void gtk_custom_hruler_init (GtkCustomHRuler * custom_hruler);
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static gint gtk_custom_hruler_motion_notify (GtkWidget * widget, GdkEventMotion * event);
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static void gtk_custom_hruler_draw_ticks (GtkCustomRuler * ruler);
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static void gtk_custom_hruler_draw_pos (GtkCustomRuler * ruler);
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GType gtk_custom_hruler_get_type (void)
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{
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static GType hruler_type = 0;
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if (!hruler_type)
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{
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static const GTypeInfo hruler_info =
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{
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sizeof (GtkCustomHRulerClass),
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NULL, /* base_init */
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NULL, /* base_finalize */
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(GClassInitFunc) gtk_custom_hruler_class_init,
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NULL, /* class_finalize */
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NULL, /* class_data */
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sizeof (GtkCustomHRuler),
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0, /* n_preallocs */
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(GInstanceInitFunc) gtk_custom_hruler_init,
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};
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hruler_type = g_type_register_static (gtk_custom_ruler_get_type(), "GtkCustomHRuler",
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&hruler_info, 0);
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}
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return hruler_type;
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}
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static void
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gtk_custom_hruler_class_init (GtkCustomHRulerClass * klass)
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{
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GtkWidgetClass *widget_class;
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GtkCustomRulerClass *ruler_class;
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widget_class = (GtkWidgetClass *) klass;
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ruler_class = (GtkCustomRulerClass *) klass;
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widget_class->motion_notify_event = gtk_custom_hruler_motion_notify;
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ruler_class->draw_ticks = gtk_custom_hruler_draw_ticks;
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ruler_class->draw_pos = gtk_custom_hruler_draw_pos;
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}
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static void
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gtk_custom_hruler_init (GtkCustomHRuler * custom_hruler)
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{
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GtkWidget *widget;
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widget = GTK_WIDGET (custom_hruler);
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widget->requisition.width = widget->style->xthickness * 2 + 1;
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widget->requisition.height = widget->style->ythickness * 2 + RULER_HEIGHT;
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}
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GtkWidget *
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gtk_custom_hruler_new (void)
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{
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return GTK_WIDGET (gtk_type_new (gtk_custom_hruler_get_type ()));
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}
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static gint
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gtk_custom_hruler_motion_notify (GtkWidget * widget, GdkEventMotion * event)
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{
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GtkCustomRuler *ruler;
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gint x;
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g_return_val_if_fail (widget != NULL, FALSE);
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g_return_val_if_fail (GTK_IS_CUSTOM_HRULER (widget), FALSE);
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g_return_val_if_fail (event != NULL, FALSE);
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ruler = GTK_CUSTOM_RULER (widget);
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if (event->is_hint)
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gdk_window_get_pointer (widget->window, &x, NULL, NULL);
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else
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x = event->x;
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ruler->position = ruler->lower + ((ruler->upper - ruler->lower) * x) / widget->allocation.width;
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/* Make sure the ruler has been allocated already */
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if (ruler->backing_store != NULL)
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gtk_custom_ruler_draw_pos (ruler);
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return FALSE;
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}
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static void
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gtk_custom_hruler_draw_ticks (GtkCustomRuler * ruler)
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{
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GtkWidget *widget;
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GdkGC *gc, *bg_gc;
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GdkFont *font;
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gint i;
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GtkCustomRulerMark *marks;
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gint nmarks;
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gint max_chars;
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g_return_if_fail (ruler != NULL);
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g_return_if_fail (GTK_IS_CUSTOM_HRULER (ruler));
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if (!GTK_WIDGET_DRAWABLE (ruler))
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return;
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widget = GTK_WIDGET (ruler);
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gc = widget->style->fg_gc[GTK_STATE_NORMAL];
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bg_gc = widget->style->bg_gc[GTK_STATE_NORMAL];
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font = gtk_style_get_font(widget->style);
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gtk_paint_box (widget->style, ruler->backing_store,
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GTK_STATE_NORMAL, GTK_SHADOW_NONE,
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NULL, widget, "custom_hruler", 0, 0, widget->allocation.width, widget->allocation.height);
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gdk_draw_line (ruler->backing_store, gc, 0, widget->allocation.height - 1,
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widget->allocation.width, widget->allocation.height - 1);
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if ((ruler->upper - ruler->lower) == 0) {
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return;
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}
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/* we have to assume a fixed width font here */
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max_chars = widget->allocation.width / gdk_string_width (font, "8");
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nmarks = ruler->metric->get_marks (&marks, ruler->lower, ruler->upper, max_chars);
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for (i = 0; i < nmarks; i++) {
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gint pos;
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gint height;
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pos = ROUND ((marks[i].position - ruler->lower) / ruler->metric->units_per_pixel);
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height = widget->allocation.height;
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switch (marks[i].style) {
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case GtkCustomRulerMarkMajor:
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gdk_draw_line (ruler->backing_store, gc, pos, height, pos, 0);
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break;
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case GtkCustomRulerMarkMinor:
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gdk_draw_line (ruler->backing_store, gc, pos, height, pos, height - (height/2));
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break;
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case GtkCustomRulerMarkMicro:
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gdk_draw_line (ruler->backing_store, gc, pos, height, pos, height - 3);
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break;
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}
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gdk_draw_string (ruler->backing_store, font, gc, pos + 2, font->ascent - 1, marks[i].label);
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g_free (marks[i].label);
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}
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if (nmarks) {
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g_free (marks);
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}
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}
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static void
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gtk_custom_hruler_draw_pos (GtkCustomRuler * ruler)
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{
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GtkWidget *widget;
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GdkGC *gc;
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int i;
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gint x, y;
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gint width, height;
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gint bs_width, bs_height;
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gint xthickness;
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gint ythickness;
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gfloat increment;
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g_return_if_fail (ruler != NULL);
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g_return_if_fail (GTK_IS_CUSTOM_HRULER (ruler));
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if (GTK_WIDGET_DRAWABLE (ruler) && (ruler->upper - ruler->lower) > 0) {
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widget = GTK_WIDGET (ruler);
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gc = widget->style->fg_gc[GTK_STATE_NORMAL];
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xthickness = widget->style->xthickness;
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ythickness = widget->style->ythickness;
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width = widget->allocation.width;
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height = widget->allocation.height - ythickness * 2;
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bs_width = height / 2;
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bs_width |= 1; /* make sure it's odd */
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bs_height = bs_width / 2 + 1;
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if ((bs_width > 0) && (bs_height > 0)) {
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/* If a backing store exists, restore the ruler */
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if (ruler->backing_store && ruler->non_gr_exp_gc)
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gdk_draw_pixmap (ruler->widget.window,
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ruler->non_gr_exp_gc,
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ruler->backing_store, ruler->xsrc, ruler->ysrc, ruler->xsrc, ruler->ysrc, bs_width, bs_height);
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increment = (gfloat) width / (ruler->upper - ruler->lower);
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x = ROUND ((ruler->position - ruler->lower) * increment) + (xthickness - bs_width) / 2 - 1;
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y = (height + bs_height) / 2 + ythickness;
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for (i = 0; i < bs_height; i++)
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gdk_draw_line (widget->window, gc, x + i, y + i, x + bs_width - 1 - i, y + i);
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ruler->xsrc = x;
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ruler->ysrc = y;
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}
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}
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}
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