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121 lines
3.0 KiB
C
121 lines
3.0 KiB
C
/*
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* Copyright (C) 2008, Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include "sugar-grid.h"
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static void sugar_grid_class_init (SugarGridClass *grid_class);
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static void sugar_grid_init (SugarGrid *grid);
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G_DEFINE_TYPE(SugarGrid, sugar_grid, G_TYPE_OBJECT)
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void
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sugar_grid_setup(SugarGrid *grid, gint width, gint height)
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{
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g_free(grid->weights);
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grid->weights = g_new0(guchar, width * height);
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grid->width = width;
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grid->height = height;
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}
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static gboolean
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check_bounds(SugarGrid *grid, GdkRectangle *rect)
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{
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return (grid->weights != NULL &&
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grid->width >= rect->x + rect->width &&
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grid->height >= rect->y + rect->height);
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}
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void
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sugar_grid_add_weight(SugarGrid *grid, GdkRectangle *rect)
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{
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int i, k;
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if (!check_bounds(grid, rect)) {
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g_warning("Trying to add weight outside the grid bounds.");
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return;
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}
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for (k = rect->y; k < rect->y + rect->height; k++) {
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for (i = rect->x; i < rect->x + rect->width; i++) {
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grid->weights[i + k * grid->width] += 1;
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}
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}
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}
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void
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sugar_grid_remove_weight(SugarGrid *grid, GdkRectangle *rect)
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{
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int i, k;
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if (!check_bounds(grid, rect)) {
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g_warning("Trying to remove weight outside the grid bounds.");
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return;
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}
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for (k = rect->y; k < rect->y + rect->height; k++) {
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for (i = rect->x; i < rect->x + rect->width; i++) {
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grid->weights[i + k * grid->width] -= 1;
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}
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}
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}
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guint
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sugar_grid_compute_weight(SugarGrid *grid, GdkRectangle *rect)
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{
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int i, k, sum = 0;
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if (!check_bounds(grid, rect)) {
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g_warning("Trying to compute weight outside the grid bounds.");
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return 0;
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}
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for (k = rect->y; k < rect->y + rect->height; k++) {
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for (i = rect->x; i < rect->x + rect->width; i++) {
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sum += grid->weights[i + k * grid->width];
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}
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}
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return sum;
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}
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static void
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sugar_grid_finalize(GObject *object)
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{
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SugarGrid *grid = SUGAR_GRID(object);
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g_free(grid->weights);
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}
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static void
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sugar_grid_class_init(SugarGridClass *grid_class)
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{
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GObjectClass *gobject_class;
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gobject_class = G_OBJECT_CLASS(grid_class);
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gobject_class->finalize = sugar_grid_finalize;
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}
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static void
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sugar_grid_init(SugarGrid *grid)
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{
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grid->weights = NULL;
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}
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