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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <gtkdatabox_regions.h>
static void gtk_databox_regions_real_draw (GtkDataboxGraph * regions,
GtkDatabox* box);
/**
* GtkDataboxRegionsPrivate
*
* A private data structure used by the #GtkDataboxRegions. It shields all internal things
* from developers who are just using the object.
*
**/
typedef struct _GtkDataboxRegionsPrivate GtkDataboxRegionsPrivate;
struct _GtkDataboxRegionsPrivate
{
gint16 *xpixels;
gint16 *y1pixels;
gint16 *y2pixels;
guint pixelsalloc;
};
G_DEFINE_TYPE_WITH_PRIVATE(GtkDataboxRegions, gtk_databox_regions,
GTK_DATABOX_TYPE_XYYC_GRAPH)
static void
regions_finalize (GObject * object)
{
GtkDataboxRegions *regions = GTK_DATABOX_REGIONS (object);
GtkDataboxRegionsPrivate *priv=gtk_databox_regions_get_instance_private(regions);
g_free (priv->xpixels);
g_free (priv->y1pixels);
g_free (priv->y2pixels);
/* Chain up to the parent class */
G_OBJECT_CLASS (gtk_databox_regions_parent_class)->finalize (object);
}
static void
gtk_databox_regions_class_init (GtkDataboxRegionsClass *klass )
{
GtkDataboxGraphClass *graph_class = GTK_DATABOX_GRAPH_CLASS (klass);
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
gobject_class->finalize = regions_finalize;
graph_class->draw = gtk_databox_regions_real_draw;
}
static void
gtk_databox_regions_complete (GtkDataboxRegions * regions)
{
GtkDataboxRegionsPrivate *priv=gtk_databox_regions_get_instance_private(regions);
priv->xpixels = NULL;
priv->y1pixels = NULL;
priv->y2pixels = NULL;
priv->pixelsalloc = 0;
}
static void
gtk_databox_regions_init (GtkDataboxRegions *regions)
{
g_signal_connect (regions, "notify::length",
G_CALLBACK (gtk_databox_regions_complete), NULL);
}
/**
* 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, GdkRGBA * 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,
"xstart", 0,
"y1start", 0,
"y2start", 0,
"xstride", 1,
"y1stride", 1,
"y2stride", 1,
"xtype", G_TYPE_FLOAT,
"ytype", G_TYPE_FLOAT,
"length", len,
"maxlen", len,
"color", color,NULL);
return GTK_DATABOX_GRAPH (regions);
}
/**
* gtk_databox_regions_new_full:
* @maxlen: maximum length of @X and @Y
* @len: actual number of @X and @Y values to plot
* @X: array of ordinates
* @Y1: array of co-ordinates
* @Y2: array of co-ordinates
* @xstart: the first element in the X array to plot (usually 0)
* @y1start: the first element in the Y1 array to plot (usually 0)
* @y2start: the first element in the Y2 array to plot (usually 0)
* @xstride: successive elements in the X array are separated by this much (1 if array, ncols if matrix)
* @y1stride: successive elements in the Y1 array are separated by this much (1 if array, ncols if matrix)
* @y2stride: successive elements in the Y2 array are separated by this much (1 if array, ncols if matrix)
* @xtype: the GType of the X array elements. G_TYPE_FLOAT, G_TYPE_DOUBLE, etc.
* @ytype: the GType of the Y1/Y2 array elements. G_TYPE_FLOAT, G_TYPE_DOUBLE, etc.
* @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_full (guint maxlen, guint len,
void * X, guint xstart, guint xstride, GType xtype,
void * Y1, guint y1start, guint y1stride,
void * Y2, guint y2start, guint y2stride, GType ytype,
GdkRGBA * 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,
"xstart", xstart,
"y1start", y1start,
"y2start", y2start,
"xstride", xstride,
"y1stride", y1stride,
"y2stride", y2stride,
"xtype", xtype,
"ytype", ytype,
"length", len,
"maxlen", maxlen,
"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);
GtkDataboxRegionsPrivate *priv=gtk_databox_regions_get_instance_private(regions);
GdkPoint data[4];
guint i = 0;
void *X;
void *Y1;
void *Y2;
guint len, maxlen;
cairo_t *cr;
gint16 *xpixels, *y1pixels, *y2pixels;
guint xstart, xstride, y1start, y1stride, y2start, y2stride;
GType xtype, ytype;
g_return_if_fail (GTK_DATABOX_IS_REGIONS (regions));
g_return_if_fail (GTK_IS_DATABOX (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");
len = gtk_databox_xyyc_graph_get_length (GTK_DATABOX_XYYC_GRAPH (graph));
maxlen = gtk_databox_xyyc_graph_get_maxlen (GTK_DATABOX_XYYC_GRAPH (graph));
if (priv->pixelsalloc < len)
{
priv->pixelsalloc = len;
priv->xpixels = (gint16 *)g_realloc(priv->xpixels, len * sizeof(gint16));
priv->y1pixels = (gint16 *)g_realloc(priv->y1pixels, len * sizeof(gint16));
priv->y2pixels = (gint16 *)g_realloc(priv->y2pixels, len * sizeof(gint16));
}
xpixels = priv->xpixels;
y1pixels = priv->y1pixels;
y2pixels = priv->y2pixels;
X = gtk_databox_xyyc_graph_get_X (GTK_DATABOX_XYYC_GRAPH (graph));
xstart = gtk_databox_xyyc_graph_get_xstart (GTK_DATABOX_XYYC_GRAPH (graph));
xstride = gtk_databox_xyyc_graph_get_xstride (GTK_DATABOX_XYYC_GRAPH (graph));
xtype = gtk_databox_xyyc_graph_get_xtype (GTK_DATABOX_XYYC_GRAPH (graph));
gtk_databox_values_to_xpixels(box, xpixels, X, xtype, maxlen, xstart, xstride, len);
ytype = gtk_databox_xyyc_graph_get_ytype (GTK_DATABOX_XYYC_GRAPH (graph));
Y1 = gtk_databox_xyyc_graph_get_Y1 (GTK_DATABOX_XYYC_GRAPH (graph));
y1start = gtk_databox_xyyc_graph_get_y1start (GTK_DATABOX_XYYC_GRAPH (graph));
y1stride = gtk_databox_xyyc_graph_get_y1stride (GTK_DATABOX_XYYC_GRAPH (graph));
gtk_databox_values_to_ypixels(box, y1pixels, Y1, ytype, maxlen, y1start, y1stride, len);
Y2 = gtk_databox_xyyc_graph_get_Y2 (GTK_DATABOX_XYYC_GRAPH (graph));
y2start = gtk_databox_xyyc_graph_get_y2start (GTK_DATABOX_XYYC_GRAPH (graph));
y2stride = gtk_databox_xyyc_graph_get_y2stride (GTK_DATABOX_XYYC_GRAPH (graph));
gtk_databox_values_to_ypixels(box, y2pixels, Y2, ytype, maxlen, y2start, y2stride, len);
cr = gtk_databox_graph_create_gc (graph, box);
data[2].x = *xpixels;
data[2].y = *y2pixels;
data[3].x = *xpixels;
data[3].y = *y1pixels;
xpixels++; y1pixels++; y2pixels++;
for (i = 0; i < len-1; i++, xpixels++, y1pixels++, y2pixels++)
{
data[0].x = data[2].x; /* 4 points in the polygon */
data[0].y = data[2].y;
data[1].x = data[3].x;
data[1].y = data[3].y;
data[2].x = *xpixels;
data[2].y = *y2pixels;
data[3].x = *xpixels;
data[3].y = *y1pixels;
cairo_move_to(cr, data[1].x, data[1].y);
cairo_line_to(cr, data[0].x, data[0].y);
cairo_line_to(cr, data[2].x, data[2].y);
cairo_line_to(cr, data[3].x, data[3].y);
cairo_close_path (cr);
cairo_fill(cr);
}
cairo_destroy(cr);
return;
}
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