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/* GtkSHRuler
*
* Copyright (C) 2000-2005 Alfons Hoogervorst & The Sylpheed Claws Team
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/* I derived this class from hruler. S in HRuler could be read as
* Sylpheed (sylpheed.good-day.net), but also [S]ettable HRuler.
* I basically ripped apart the draw_ticks member of HRuler; it
* now draws the ticks at ruler->max_size. so gtk_ruler_set_range's
* last parameter has the distance between two ticks (which is
* the width of the fixed font character!
*
* -- Alfons
*/
#include <math.h>
#include <stdio.h>
#include <string.h>
#include <gtk/gtkhruler.h>
#include "gtkshruler.h"
#define RULER_HEIGHT 14
#define MINIMUM_INCR 5
#define MAXIMUM_SUBDIVIDE 5
#define MAXIMUM_SCALES 10
#define ROUND(x) ((int) ((x) + 0.5))
static void gtk_shruler_class_init (GtkSHRulerClass *klass);
static void gtk_shruler_init (GtkSHRuler *hruler);
static void gtk_shruler_draw_ticks (GtkRuler *ruler);
#if 0
static void gtk_shruler_draw_pos (GtkRuler *ruler);
#endif
GType
gtk_shruler_get_type(void)
{
static GType shruler_type = 0;
if ( !shruler_type ) {
static const GTypeInfo shruler_info = {
sizeof (GtkSHRulerClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gtk_shruler_class_init,
(GClassFinalizeFunc) NULL,
NULL, /* class_data */
sizeof (GtkSHRuler),
0, /* n_preallocs */
(GInstanceInitFunc) gtk_shruler_init,
};
/* inherit from GtkHRuler */
shruler_type = g_type_register_static (GTK_TYPE_HRULER, "GtkSHRuler", &shruler_info, (GTypeFlags)0);
}
return shruler_type;
}
static void
gtk_shruler_class_init(GtkSHRulerClass * klass)
{
GtkWidgetClass * widget_class;
GtkRulerClass * hruler_class;
widget_class = (GtkWidgetClass*) klass;
hruler_class = (GtkRulerClass*) klass;
/* just neglect motion notify events */
widget_class->motion_notify_event = NULL /* gtk_shruler_motion_notify */;
/* we want the old ruler draw ticks... */
/* ruler_class->draw_ticks = gtk_hruler_draw_ticks; */
hruler_class->draw_ticks = gtk_shruler_draw_ticks;
/* unimplemented draw pos */
hruler_class->draw_pos = NULL;
/*
hruler_class->draw_pos = gtk_shruler_draw_pos;
*/
}
static void
gtk_shruler_init (GtkSHRuler * shruler)
{
GtkWidget * widget;
widget = GTK_WIDGET (shruler);
widget->requisition.width = widget->style->xthickness * 2 + 1;
widget->requisition.height = widget->style->ythickness * 2 + RULER_HEIGHT;
}
GtkWidget*
gtk_shruler_new(void)
{
return GTK_WIDGET( g_object_new( gtk_shruler_get_type(), NULL ) );
}
static void
gtk_shruler_draw_ticks(GtkRuler *ruler)
{
GtkWidget *widget;
GdkGC *gc, *bg_gc;
gint i;
gint width, height;
gint xthickness;
gint ythickness;
gint pos;
g_return_if_fail (ruler != NULL);
g_return_if_fail (GTK_IS_HRULER (ruler));
if (!GTK_WIDGET_DRAWABLE (ruler))
return;
widget = GTK_WIDGET (ruler);
gc = widget->style->fg_gc[GTK_STATE_NORMAL];
bg_gc = widget->style->bg_gc[GTK_STATE_NORMAL];
xthickness = widget->style->xthickness;
ythickness = widget->style->ythickness;
width = widget->allocation.width;
height = widget->allocation.height - ythickness * 2;
gtk_paint_box (widget->style, ruler->backing_store,
GTK_STATE_NORMAL, GTK_SHADOW_OUT,
NULL, widget, "hruler",
0, 0,
widget->allocation.width, widget->allocation.height);
#if 0
gdk_draw_line (ruler->backing_store, gc,
xthickness,
height + ythickness,
widget->allocation.width - xthickness,
height + ythickness);
#endif
/* assume ruler->max_size has the char width */
/* i is increment of char_width, pos is label number
* y position is based on height of widget itself */
for ( i = 0, pos = 0; i < widget->allocation.width - xthickness; i += ruler->max_size, pos++ ) {
gint length = height / 8;
if ( pos % 10 == 0 ) length = ( 2 * height / 3 );
else if ( pos % 5 == 0 ) length = ( height / 3 );
gdk_draw_line(ruler->backing_store, gc,
i, height + ythickness,
i, height - length);
if ( pos % 10 == 0 ) {
gchar buf[8];
PangoLayout *layout;
/* draw label */
g_snprintf(buf, sizeof buf, "%d", pos);
layout = gtk_widget_create_pango_layout
(GTK_WIDGET(ruler), buf);
gdk_draw_layout(ruler->backing_store, gc, i + 2,
0, layout);
g_object_unref(layout);
}
}
}
/* gtk_ruler_set_pos() - does not work yet, need to reimplement
* gtk_ruler_draw_pos(). */
void
gtk_shruler_set_pos(GtkSHRuler * ruler, gfloat pos)
{
GtkRuler * ruler_;
g_return_if_fail( ruler != NULL );
ruler_ = GTK_RULER(ruler);
if ( pos < ruler_->lower )
pos = ruler_->lower;
if ( pos > ruler_->upper )
pos = ruler_->upper;
ruler_->position = pos;
/* Make sure the ruler has been allocated already */
if ( ruler_->backing_store != NULL )
gtk_ruler_draw_pos(ruler_);
}
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