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/* $Id: gtkdatabox_regions.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_regions.h>
G_DEFINE_TYPE(GtkDataboxRegions, gtk_databox_regions,
GTK_DATABOX_TYPE_XYYC_GRAPH)
static void gtk_databox_regions_real_draw (GtkDataboxGraph * regions,
GtkDatabox* box);
static void
gtk_databox_regions_class_init (GtkDataboxRegionsClass *klass)
{
GtkDataboxGraphClass *graph_class = GTK_DATABOX_GRAPH_CLASS (klass);
graph_class->draw = gtk_databox_regions_real_draw;
}
static void
gtk_databox_regions_init (GtkDataboxRegions *regions __attribute__((unused)))
{
}
/**
* gtk_databox_regions_new:
* @len: length of @X, @Y1 and @Y2
* @X: array of ordinates
* @Y1: array of co-ordinates
* @Y2: array of co-ordinates
* @color: color of the markers
*
* Creates a new #GtkDataboxRegions object which can be added to a #GtkDatabox widget
*
* Return value: A new #GtkDataboxRegions object
**/
GtkDataboxGraph *
gtk_databox_regions_new (guint len, gfloat * X, gfloat * Y1, gfloat * Y2, GdkColor * color)
{
GtkDataboxRegions *regions;
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);
regions = g_object_new (GTK_DATABOX_TYPE_REGIONS,
"X-Values", X,
"Y1-Values", Y1,
"Y2-Values", Y2,
"length", len, "color", color,NULL);
return GTK_DATABOX_GRAPH (regions);
}
static void
gtk_databox_regions_real_draw (GtkDataboxGraph * graph,
GtkDatabox* box)
{
GtkDataboxRegions *regions = GTK_DATABOX_REGIONS (graph);
GdkPoint data[4];
GdkGC *gc;
GdkPixmap *pixmap;
guint i = 0;
gfloat *X;
gfloat *Y1;
gfloat *Y2;
guint len;
g_return_if_fail (GTK_DATABOX_IS_REGIONS (regions));
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_regions 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[2].x = gtk_databox_value_to_pixel_x (box, *X);
data[2].y = gtk_databox_value_to_pixel_y (box, *Y2);
data[3].x = gtk_databox_value_to_pixel_x (box, *X);
data[3].y = gtk_databox_value_to_pixel_y (box, *Y1);
X++; Y1++; Y2++;
for (i = 0; i < len-1; i++, X++, Y1++, Y2++)
{
data[1].x = data[2].x; /* 4 points in the polygon */
data[1].y = data[2].y;
data[0].x = data[3].x;
data[0].y = data[3].y;
data[2].x = gtk_databox_value_to_pixel_x (box, *X);
data[2].y = gtk_databox_value_to_pixel_y (box, *Y2);
data[3].x = gtk_databox_value_to_pixel_x (box, *X);
data[3].y = gtk_databox_value_to_pixel_y (box, *Y1);
gdk_draw_polygon (pixmap, gc, 1, /* 1 for a filled polygon*/
data, 4);
}
return;
}
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