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/* $Id: gtkdatabox_offset_bars.c 4 2008-06-22 09:19:11Z rbock $ */
/* GtkDatabox - An extension to the gtk+ library
* Copyright (C) 2011 - 2012 Dr. Matt Flax <flatmax@>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1
* 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <gtkdatabox_offset_bars.h>
G_DEFINE_TYPE(GtkDataboxOffsetBars, gtk_databox_offset_bars,
GTK_DATABOX_TYPE_XYYC_GRAPH)
static void gtk_databox_offset_bars_real_draw (GtkDataboxGraph * bars,
GtkDatabox* box);
/**
* GtkDataboxOffsetBarsPrivate
*
* A private data structure used by the #GtkDataboxOffsetBars. It shields all internal things
* from developers who are just using the object.
*
**/
typedef struct _GtkDataboxOffsetBarsPrivate GtkDataboxOffsetBarsPrivate;
struct _GtkDataboxOffsetBarsPrivate
{
GdkSegment *data;
};
static void
bars_finalize (GObject * object)
{
g_free (GTK_DATABOX_OFFSET_BARS_GET_PRIVATE(object)->data);
/* Chain up to the parent class */
G_OBJECT_CLASS (gtk_databox_offset_bars_parent_class)->finalize (object);
}
static void
gtk_databox_offset_bars_class_init (GtkDataboxOffsetBarsClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GtkDataboxGraphClass *graph_class = GTK_DATABOX_GRAPH_CLASS (klass);
gobject_class->finalize = bars_finalize;
graph_class->draw = gtk_databox_offset_bars_real_draw;
g_type_class_add_private (klass, sizeof (GtkDataboxOffsetBarsPrivate));
}
static void
gtk_databox_offset_bars_complete (GtkDataboxOffsetBars * bars)
{
GTK_DATABOX_OFFSET_BARS_GET_PRIVATE(bars)->data =
g_new0 (GdkSegment,
gtk_databox_xyyc_graph_get_length
(GTK_DATABOX_XYYC_GRAPH (bars)));
}
static void
gtk_databox_offset_bars_init (GtkDataboxOffsetBars *bars)
{
g_signal_connect (bars, "notify::length",
G_CALLBACK (gtk_databox_offset_bars_complete), NULL);
}
/**
* gtk_databox_offset_bars_new:
* @len: length of @X, @Y1 and @Y2
* @X: array of horizontal position values of markers
* @Y1: array of starting vertical position values of markers
* @Y2: array of ending vertical position values of markers
* @color: color of the markers
* @size: marker size or line width (depending on the @type)
*
* Creates a new #GtkDataboxOffsetBars object which can be added to a #GtkDatabox widget
*
* Return value: A new #GtkDataboxOffsetBars object
**/
GtkDataboxGraph *
gtk_databox_offset_bars_new (guint len, gfloat * X, gfloat * Y1, gfloat * Y2,
GdkColor * color, guint size)
{
GtkDataboxOffsetBars *bars;
g_return_val_if_fail (X, NULL);
g_return_val_if_fail (Y1, NULL);
g_return_val_if_fail (Y2, NULL);
g_return_val_if_fail ((len > 0), NULL);
bars = g_object_new (GTK_DATABOX_TYPE_OFFSET_BARS,
"X-Values", X,
"Y1-Values", Y1,
"Y2-Values", Y2,
"length", len, "color", color, "size", size, NULL);
return GTK_DATABOX_GRAPH (bars);
}
static void
gtk_databox_offset_bars_real_draw (GtkDataboxGraph * graph,
GtkDatabox* box)
{
GtkDataboxOffsetBars *bars = GTK_DATABOX_OFFSET_BARS (graph);
GtkDataboxOffsetBarsPrivate *priv = GTK_DATABOX_OFFSET_BARS_GET_PRIVATE(graph);
GdkGC *gc;
GdkPixmap *pixmap;
guint i = 0;
gfloat *X;
gfloat *Y1;
gfloat *Y2;
guint len;
GdkSegment *data;
g_return_if_fail (GTK_DATABOX_IS_OFFSET_BARS (bars));
g_return_if_fail (GTK_IS_DATABOX (box));
pixmap = gtk_databox_get_backing_pixmap (box);
if (gtk_databox_get_scale_type_y (box) == GTK_DATABOX_SCALE_LOG)
g_warning
("gtk_databox_offset_bars do not work well with logarithmic scale in Y axis");
if (!(gc = gtk_databox_graph_get_gc(graph)))
gc = gtk_databox_graph_create_gc (graph, box);
len = gtk_databox_xyyc_graph_get_length (GTK_DATABOX_XYYC_GRAPH (graph));
X = gtk_databox_xyyc_graph_get_X (GTK_DATABOX_XYYC_GRAPH (graph));
Y1 = gtk_databox_xyyc_graph_get_Y1 (GTK_DATABOX_XYYC_GRAPH (graph));
Y2 = gtk_databox_xyyc_graph_get_Y2 (GTK_DATABOX_XYYC_GRAPH (graph));
data = priv->data;
for (i = 0; i < len; i++, data++, X++, Y1++, Y2++)
{
data->x1 = data->x2 = gtk_databox_value_to_pixel_x (box, *X);
data->y1 = gtk_databox_value_to_pixel_y (box, *Y1);
data->y2 = gtk_databox_value_to_pixel_y (box, *Y2);
}
/* More than 2^16 bars will cause X IO error on most XServers
(Hint from Paul Barton-Davis) */
for (i = 0; i < len; i += 65536)
{
gdk_draw_segments (pixmap, gc,
priv->data + i, MIN (65536, len - i));
}
return;
}
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