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
|
/*
* Copyright (C) 2008, Red Hat, Inc.
*
* This library 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 of the License, or (at your option) any later version.
*
* This library 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 Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "sugar-grid.h"
static void sugar_grid_class_init (SugarGridClass *grid_class);
static void sugar_grid_init (SugarGrid *grid);
G_DEFINE_TYPE(SugarGrid, sugar_grid, G_TYPE_OBJECT)
void
sugar_grid_setup(SugarGrid *grid, gint width, gint height)
{
g_free(grid->weights);
grid->weights = g_new0(guchar, width * height);
grid->width = width;
grid->height = height;
}
static gboolean
check_bounds(SugarGrid *grid, GdkRectangle *rect)
{
return (grid->weights != NULL &&
grid->width >= rect->x + rect->width &&
grid->height >= rect->y + rect->height);
}
void
sugar_grid_add_weight(SugarGrid *grid, GdkRectangle *rect)
{
int i, k;
if (!check_bounds(grid, rect)) {
g_warning("Trying to add weight outside the grid bounds.");
return;
}
for (k = rect->y; k < rect->y + rect->height; k++) {
for (i = rect->x; i < rect->x + rect->width; i++) {
grid->weights[i + k * grid->width] += 1;
}
}
}
void
sugar_grid_remove_weight(SugarGrid *grid, GdkRectangle *rect)
{
int i, k;
if (!check_bounds(grid, rect)) {
g_warning("Trying to remove weight outside the grid bounds.");
return;
}
for (k = rect->y; k < rect->y + rect->height; k++) {
for (i = rect->x; i < rect->x + rect->width; i++) {
grid->weights[i + k * grid->width] -= 1;
}
}
}
guint
sugar_grid_compute_weight(SugarGrid *grid, GdkRectangle *rect)
{
int i, k, sum = 0;
if (!check_bounds(grid, rect)) {
g_warning("Trying to compute weight outside the grid bounds.");
return 0;
}
for (k = rect->y; k < rect->y + rect->height; k++) {
for (i = rect->x; i < rect->x + rect->width; i++) {
sum += grid->weights[i + k * grid->width];
}
}
return sum;
}
static void
sugar_grid_finalize(GObject *object)
{
SugarGrid *grid = SUGAR_GRID(object);
g_free(grid->weights);
}
static void
sugar_grid_class_init(SugarGridClass *grid_class)
{
GObjectClass *gobject_class;
gobject_class = G_OBJECT_CLASS(grid_class);
gobject_class->finalize = sugar_grid_finalize;
}
static void
sugar_grid_init(SugarGrid *grid)
{
grid->weights = NULL;
}
|