1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
|
/* $Id: gtkdatabox_bars.c 4 2008-06-22 09:19:11Z rbock $ */
/* GtkDatabox - An extension to the gtk+ library
* Copyright (C) 1998 - 2008 Dr. Roland Bock
*
* 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_bars.h>
G_DEFINE_TYPE(GtkDataboxBars, gtk_databox_bars,
GTK_DATABOX_TYPE_XYC_GRAPH)
static void gtk_databox_bars_real_draw (GtkDataboxGraph * bars,
GtkDatabox* box);
/**
* GtkDataboxBarsPrivate
*
* A private data structure used by the #GtkDataboxBars. It shields all internal things
* from developers who are just using the object.
*
**/
typedef struct _GtkDataboxBarsPrivate GtkDataboxBarsPrivate;
struct _GtkDataboxBarsPrivate
{
GdkSegment *data;
};
static void
bars_finalize (GObject * object)
{
GtkDataboxBars *bars = GTK_DATABOX_BARS (object);
g_free (GTK_DATABOX_BARS_GET_PRIVATE(bars)->data);
/* Chain up to the parent class */
G_OBJECT_CLASS (gtk_databox_bars_parent_class)->finalize (object);
}
static void
gtk_databox_bars_class_init (GtkDataboxBarsClass *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_bars_real_draw;
g_type_class_add_private(klass, sizeof(GtkDataboxBarsPrivate));
}
static void
gtk_databox_bars_complete (GtkDataboxBars * bars)
{
GTK_DATABOX_BARS_GET_PRIVATE(bars)->data =
g_new0 (GdkSegment,
gtk_databox_xyc_graph_get_length
(GTK_DATABOX_XYC_GRAPH (bars)));
}
static void
gtk_databox_bars_init (GtkDataboxBars *bars)
{
g_signal_connect (bars, "notify::length",
G_CALLBACK (gtk_databox_bars_complete), NULL);
}
/**
* gtk_databox_bars_new:
* @len: length of @X and @Y
* @X: array of horizontal position values of markers
* @Y: array of vertical position values of markers
* @color: color of the markers
* @size: marker size or line width (depending on the @type)
*
* Creates a new #GtkDataboxBars object which can be added to a #GtkDatabox widget
*
* Return value: A new #GtkDataboxBars object
**/
GtkDataboxGraph *
gtk_databox_bars_new (guint len, gfloat * X, gfloat * Y,
GdkColor * color, guint size)
{
GtkDataboxBars *bars;
g_return_val_if_fail (X, NULL);
g_return_val_if_fail (Y, NULL);
g_return_val_if_fail ((len > 0), NULL);
bars = g_object_new (GTK_DATABOX_TYPE_BARS,
"X-Values", X,
"Y-Values", Y,
"length", len, "color", color, "size", size, NULL);
return GTK_DATABOX_GRAPH (bars);
}
static void
gtk_databox_bars_real_draw (GtkDataboxGraph * graph,
GtkDatabox* box)
{
GtkDataboxBars *bars = GTK_DATABOX_BARS (graph);
GdkSegment *data;
GdkGC *gc;
GdkPixmap *pixmap;
guint i = 0;
gfloat *X;
gfloat *Y;
guint len;
gint16 zero = 0;
g_return_if_fail (GTK_DATABOX_IS_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_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_xyc_graph_get_length (GTK_DATABOX_XYC_GRAPH (graph));
X = gtk_databox_xyc_graph_get_X (GTK_DATABOX_XYC_GRAPH (graph));
Y = gtk_databox_xyc_graph_get_Y (GTK_DATABOX_XYC_GRAPH (graph));
data = GTK_DATABOX_BARS_GET_PRIVATE(bars)->data;
zero = gtk_databox_value_to_pixel_y (box, 0);
for (i = 0; i < len; i++, data++, X++, Y++)
{
data->x1 = data->x2 = gtk_databox_value_to_pixel_x (box, *X);
data->y1 = zero;
data->y2 = gtk_databox_value_to_pixel_y (box, *Y);
}
/* 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,
GTK_DATABOX_BARS_GET_PRIVATE(bars)->data + i, MIN (65536, len - i));
}
return;
}
|
