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/*
* gtknarrativeview.c
*
* Copyright © 2013-2019 Thomas White <taw@bitwiz.org.uk>
*
* This file is part of Colloquium.
*
* Colloquium is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdlib.h>
#include <string.h>
#include <gtk/gtk.h>
#include <assert.h>
#include <math.h>
#include <libintl.h>
#define _(x) gettext(x)
#include <narrative.h>
#include "narrative_priv.h"
#include "gtknarrativeview.h"
void draw_ruler(cairo_t *cr, GtkNarrativeView *e)
{
int start_item, end_item;
int i;
double start_item_time = 0.0;
double end_item_time = 0.0;
double t;
double old_y;
/* Background */
cairo_set_source_rgba(cr, 0.9, 0.9, 0.9, 1.0);
cairo_rectangle(cr, 0.0, 0.0, e->ruler_width, e->h);
cairo_fill(cr);
/* Which items are visible? */
narrative_get_item_range(e->n, e->scroll_pos, e->scroll_pos+e->visible_height,
&start_item, &end_item);
for ( i=0; i<start_item; i++ ) {
start_item_time += e->n->items[i].estd_duration;
}
t = start_item_time;
for ( i=start_item; i<=end_item; i++ ) {
t += e->n->items[i].estd_duration;
}
end_item_time = t;
old_y = 0.0;
for ( i=start_item_time; i<=end_item_time+1; i++ ) {
double y0, y1, y;
double yitem = narrative_find_time_pos(e->n, i);
y0 = narrative_get_item_y(e->n, yitem);
y1 = narrative_get_item_y(e->n, yitem+1);
y = y0 + (y1 - y0)*(yitem-trunc(yitem));
cairo_rectangle(cr, 0.0, old_y, 100.0, y-old_y);
old_y = y;
if ( i % 2 ) {
cairo_set_source_rgb(cr, 0.9, 0.9, 0.9);
} else {
cairo_set_source_rgb(cr, 0.8, 0.8, 0.8);
}
cairo_fill(cr);
}
}
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