Learning_GTK4_tree/tools/gtk-path-tool-restrict.c

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2023-12-12 11:36:42 +01:00
/* Copyright 2023 Red Hat, Inc.
*
* GTK+ 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.
*
* GLib 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 GTK+; see the file COPYING. If not,
* see <http://www.gnu.org/licenses/>.
*
* Author: Matthias Clasen
*/
#include "config.h"
#include <gtk/gtk.h>
#include "gtk-path-tool.h"
#include <glib/gi18n-lib.h>
void
do_restrict (int *argc, const char ***argv)
{
GError *error = NULL;
double start = G_MAXDOUBLE;
double end = G_MAXDOUBLE;
char **args = NULL;
GOptionContext *context;
GOptionEntry entries[] = {
{ "start", 0, 0, G_OPTION_ARG_DOUBLE, &start, N_("Beginning of segment"), N_("LENGTH") },
{ "end", 0, 0, G_OPTION_ARG_DOUBLE, &end, N_("End of segment"), N_("LENGTH") },
{ G_OPTION_REMAINING, 0, 0, G_OPTION_ARG_FILENAME_ARRAY, &args, NULL, N_("PATH") },
{ NULL, },
};
GskPath *path, *result;
GskPathMeasure *measure;
GskPathBuilder *builder;
GskPathPoint start_point, end_point;
g_set_prgname ("gtk4-path-tool restrict");
context = g_option_context_new (NULL);
g_option_context_set_translation_domain (context, GETTEXT_PACKAGE);
g_option_context_add_main_entries (context, entries, NULL);
g_option_context_set_summary (context, _("Restrict a path to a segment."));
if (!g_option_context_parse (context, argc, (char ***)argv, &error))
{
g_printerr ("%s\n", error->message);
g_error_free (error);
exit (1);
}
g_option_context_free (context);
if (args == NULL)
{
g_printerr ("%s\n", _("No paths given."));
exit (1);
}
path = get_path (args[0]);
measure = gsk_path_measure_new (path);
if (start == G_MAXDOUBLE)
start = 0;
if (end == G_MAXDOUBLE)
end = gsk_path_measure_get_length (measure);
builder = gsk_path_builder_new ();
gsk_path_measure_get_point (measure, start, &start_point);
gsk_path_measure_get_point (measure, end, &end_point);
gsk_path_builder_add_segment (builder, path, &start_point, &end_point);
result = gsk_path_builder_free_to_path (builder);
if (result)
{
char *str = gsk_path_to_string (result);
g_print ("%s\n", str);
g_free (str);
}
else
{
g_printerr ("%s\n", _("That didn't work out."));
exit (1);
}
}