dnrops
/
gimp
mirror of https://github.com/GNOME/gimp.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
gimp/plug-ins/imagemap/imap_polygon.c

789 lines
22 KiB
C
Raw Blame History

/*
* This is a plug-in for the GIMP.
*
* Generates clickable image maps.
*
* Copyright (C) 1998-1999 Maurits Rijk lpeek.mrijk@consunet.nl
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 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 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 <stdlib.h>
#include <stdio.h>
#include "imap_cmd_delete_point.h"
#include "imap_cmd_insert_point.h"
#include "libgimp/stdplugins-intl.h"
#include "imap_main.h"
#include "imap_misc.h"
#include "imap_object_popup.h"
#include "imap_polygon.h"
#include "imap_table.h"
#include "polygon.xpm"
#define MAX_POLYGON_POINTS 99
static gboolean polygon_is_valid(Object_t *obj);
static void polygon_destruct(Object_t *obj);
static Object_t *polygon_clone(Object_t *obj);
static void polygon_assign(Object_t *obj, Object_t *des);
static void polygon_draw(Object_t* obj, GdkWindow *window, GdkGC* gc);
static void polygon_draw_sashes(Object_t* obj, GdkWindow *window, GdkGC* gc);
static MoveSashFunc_t polygon_near_sash(Object_t *obj, gint x, gint y);
static gboolean polygon_point_is_on(Object_t *obj, gint x, gint y);
static void polygon_get_dimensions(Object_t *obj, gint *x, gint *y,
gint *width, gint *height);
static void polygon_resize(Object_t *obj, gint percentage_x,
gint percentage_y);
static void polygon_move(Object_t *obj, gint dx, gint dy);
static gpointer polygon_create_info_widget(GtkWidget *frame);
static void polygon_update_info_widget(Object_t *obj, gpointer data);
static void polygon_fill_info_tab(Object_t *obj, gpointer data);
static void polygon_set_initial_focus(Object_t *obj, gpointer data);
static void polygon_update(Object_t* obj, gpointer data);
static void polygon_write_csim(Object_t* obj, gpointer param,
OutputFunc_t output);
static void polygon_write_cern(Object_t* obj, gpointer param,
OutputFunc_t output);
static void polygon_write_ncsa(Object_t* obj, gpointer param,
OutputFunc_t output);
static void polygon_do_popup(Object_t *obj, GdkEventButton *event);
static char** polygon_get_icon_data(void);
static ObjectClass_t polygon_class = {
N_("Polygon"),
NULL, /* info_dialog */
NULL, /* icon */
NULL, /* mask */
polygon_is_valid,
polygon_destruct,
polygon_clone,
polygon_assign,
NULL, /* polygon_normalize */
polygon_draw,
polygon_draw_sashes,
polygon_near_sash,
polygon_point_is_on,
polygon_get_dimensions,
polygon_resize,
polygon_move,
polygon_create_info_widget,
polygon_update_info_widget,
polygon_fill_info_tab,
polygon_set_initial_focus,
polygon_update,
polygon_write_csim,
polygon_write_cern,
polygon_write_ncsa,
polygon_do_popup,
polygon_get_icon_data
};
Object_t*
create_polygon(GList *points)
{
Polygon_t *polygon = g_new(Polygon_t, 1);
polygon->points = points;
return object_init(&polygon->obj, &polygon_class);
}
static void
polygon_free_list(Polygon_t *polygon)
{
g_list_foreach(polygon->points, (GFunc) g_free, NULL);
g_list_free(polygon->points);
polygon->points = NULL;
}
static void
polygon_destruct(Object_t *obj)
{
Polygon_t *polygon = ObjectToPolygon(obj);
polygon_free_list(polygon);
}
static gboolean
polygon_is_valid(Object_t *obj)
{
return g_list_length(ObjectToPolygon(obj)->points) > 2;
}
static Object_t*
polygon_clone(Object_t *obj)
{
Polygon_t *polygon = ObjectToPolygon(obj);
Polygon_t *clone = g_new(Polygon_t, 1);
GList *p;
clone->points = NULL;
for (p = polygon->points; p; p = p->next) {
GdkPoint *point = (GdkPoint*) p->data;
clone->points = g_list_append(clone->points,
new_point(point->x, point->y));
}
return &clone->obj;
}
static void
polygon_assign(Object_t *obj, Object_t *des)
{
Polygon_t *src_polygon = ObjectToPolygon(obj);
Polygon_t *des_polygon = ObjectToPolygon(des);
GList *p;
polygon_free_list(des_polygon);
for (p = src_polygon->points; p; p = p->next) {
GdkPoint *point = (GdkPoint*) p->data;
des_polygon->points = g_list_append(des_polygon->points,
new_point(point->x, point->y));
}
}
static void
polygon_draw(Object_t *obj, GdkWindow *window, GdkGC *gc)
{
Polygon_t *polygon = ObjectToPolygon(obj);
draw_polygon(window, gc, polygon->points);
}
static void
polygon_draw_sashes(Object_t *obj, GdkWindow *window, GdkGC *gc)
{
Polygon_t *polygon = ObjectToPolygon(obj);
GList *p;
for (p = polygon->points; p; p = p->next) {
GdkPoint *point = (GdkPoint*) p->data;
draw_sash(window, gc, point->x, point->y);
}
}
static GdkPoint *_sash_point;
static gint _sash_index;
static void
move_sash(Object_t *obj, gint dx, gint dy)
{
_sash_point->x += dx;
_sash_point->y += dy;
}
static MoveSashFunc_t
polygon_near_sash(Object_t *obj, gint x, gint y)
{
Polygon_t *polygon = ObjectToPolygon(obj);
GList *p;
_sash_index = 0;
for (p = polygon->points; p; p = p->next, _sash_index++) {
GdkPoint *point = (GdkPoint*) p->data;
if (near_sash(point->x, point->y, x, y)) {
_sash_point = point;
return move_sash;
}
}
return NULL;
}
static gboolean
right_intersect(GdkPoint *p1, GdkPoint *p2, gint x, gint y)
{
gint dx = p2->x - p1->x;
gint dy = p2->y - p1->y;
if ((dy > 0 && y > p1->y && y < p2->y) ||
(dy < y && y > p2->y && y < p1->y)) {
gint sx = p1->x + (y - p1->y) * dx / dy;
return sx > x;
}
return FALSE;
}
static gboolean
polygon_point_is_on(Object_t *obj, gint x, gint y)
{
Polygon_t *polygon = ObjectToPolygon(obj);
GList *p;
int count = 0;
GdkPoint *first, *prev;
p = polygon->points;
first = prev = (GdkPoint*) p->data;
p = p->next;
for (; p; p = p->next) {
GdkPoint *point = (GdkPoint*) p->data;
if (right_intersect(prev, point, x, y))
count++;
prev = point;
}
if (right_intersect(prev, first, x, y))
count++;
return count % 2;
}
static void
polygon_get_dimensions(Object_t *obj, gint *x, gint *y,
gint *width, gint *height)
{
Polygon_t *polygon = ObjectToPolygon(obj);
gint min_x = G_MAXINT, min_y = G_MAXINT;
gint max_x = G_MININT, max_y = G_MININT;
GList *p;
for (p = polygon->points; p; p = p->next) {
GdkPoint *point = (GdkPoint*) p->data;
if (point->x < min_x)
min_x = point->x;
if (point->x > max_x)
max_x = point->x;
if (point->y < min_y)
min_y = point->y;
if (point->y > max_y)
max_y = point->y;
}
*x = min_x;
*y = min_y;
*width = max_x - min_x;
*height = max_y - min_y;
}
static void
polygon_resize(Object_t *obj, gint percentage_x, gint percentage_y)
{
Polygon_t *polygon = ObjectToPolygon(obj);
GList *p;
for (p = polygon->points; p; p = p->next) {
GdkPoint *point = (GdkPoint*) p->data;
point->x = point->x * percentage_x / 100;
point->y = point->y * percentage_y / 100;
}
}
static void
polygon_move(Object_t *obj, gint dx, gint dy)
{
Polygon_t *polygon = ObjectToPolygon(obj);
GList *p;
for (p = polygon->points; p; p = p->next) {
GdkPoint *point = (GdkPoint*) p->data;
point->x += dx;
point->y += dy;
}
}
typedef struct {
Object_t *obj;
GtkWidget *list;
GtkWidget *x;
GtkWidget *y;
GtkWidget *update;
GtkWidget *insert;
GtkWidget *append;
GtkWidget *remove;
gint selected_row;
gint timeout;
} PolygonProperties_t;
static void
select_row_cb(GtkWidget *widget, gint row, gint column, GdkEventButton *event,
PolygonProperties_t *data)
{
gchar *text;
data->selected_row = row;
_sash_point = g_list_nth(ObjectToPolygon(data->obj)->points, row)->data;
gtk_clist_get_text(GTK_CLIST(data->list), row, 0, &text);
gtk_spin_button_set_value(GTK_SPIN_BUTTON(data->x), atoi(text));
gtk_clist_get_text(GTK_CLIST(data->list), row, 1, &text);
gtk_spin_button_set_value(GTK_SPIN_BUTTON(data->y), atoi(text));
}
static void
update_button_clicked(GtkWidget *widget, PolygonProperties_t *data)
{
gtk_clist_set_text(GTK_CLIST(data->list), data->selected_row, 0,
gtk_entry_get_text(GTK_ENTRY(data->x)));
gtk_clist_set_text(GTK_CLIST(data->list), data->selected_row, 1,
gtk_entry_get_text(GTK_ENTRY(data->y)));
}
static void
set_buttons_sensitivity(PolygonProperties_t *data)
{
gint rows = GTK_CLIST(data->list)->rows;
gint sensitive = (rows != MAX_POLYGON_POINTS) && (rows > 2);
gtk_widget_set_sensitive(data->insert, sensitive);
gtk_widget_set_sensitive(data->append, sensitive);
}
static void
insert_button_clicked(GtkWidget *widget, PolygonProperties_t *data)
{
gchar *text[2];
text[0] = gtk_entry_get_text(GTK_ENTRY(data->x));
text[1] = gtk_entry_get_text(GTK_ENTRY(data->y));
gtk_clist_insert(GTK_CLIST(data->list), data->selected_row, text);
set_buttons_sensitivity(data);
}
static void
append_button_clicked(GtkWidget *widget, PolygonProperties_t *data)
{
gchar *text[2];
text[0] = gtk_entry_get_text(GTK_ENTRY(data->x));
text[1] = gtk_entry_get_text(GTK_ENTRY(data->y));
gtk_clist_append(GTK_CLIST(data->list), text);
set_buttons_sensitivity(data);
}
static void
remove_button_clicked(GtkWidget *widget, PolygonProperties_t *data)
{
gtk_clist_remove(GTK_CLIST(data->list), data->selected_row);
set_buttons_sensitivity(data);
}
static void
x_changed_cb(GtkWidget *widget, gpointer data)
{
Object_t *obj = ((PolygonProperties_t*) data)->obj;
gint x = gtk_spin_button_get_value_as_int(GTK_SPIN_BUTTON(widget));
_sash_point->x = x;
edit_area_info_dialog_emit_geometry_signal(obj->class->info_dialog);
}
static void
y_changed_cb(GtkWidget *widget, gpointer data)
{
Object_t *obj = ((PolygonProperties_t*) data)->obj;
gint y = gtk_spin_button_get_value_as_int(GTK_SPIN_BUTTON(widget));
_sash_point->y = y;
edit_area_info_dialog_emit_geometry_signal(obj->class->info_dialog);
}
static gpointer
polygon_create_info_widget(GtkWidget *frame)
{
PolygonProperties_t *props = g_new(PolygonProperties_t, 1);
GtkWidget *hbox, *swin, *table;
GtkWidget *list;
gint max_width = get_image_width();
gint max_height = get_image_height();
gchar *titles[] = {N_("x (pixels)"), N_("y (pixels)")};
hbox = gtk_hbox_new(FALSE, 1);
gtk_container_add(GTK_CONTAINER(frame), hbox);
gtk_widget_show(hbox);
props->list = list = gtk_clist_new_with_titles(2, titles);
gtk_clist_column_titles_passive(GTK_CLIST(list));
swin = gtk_scrolled_window_new(NULL, NULL);
gtk_container_set_border_width(GTK_CONTAINER(swin), 10);
gtk_scrolled_window_set_policy(GTK_SCROLLED_WINDOW(swin),
GTK_POLICY_NEVER, GTK_POLICY_AUTOMATIC);
gtk_box_pack_start(GTK_BOX(hbox), swin, FALSE, FALSE, FALSE);
gtk_widget_show(swin);
gtk_clist_set_shadow_type(GTK_CLIST(list), GTK_SHADOW_ETCHED_IN);
gtk_scrolled_window_add_with_viewport(GTK_SCROLLED_WINDOW(swin), list);
gtk_clist_set_column_width(GTK_CLIST(list), 0, 48);
gtk_clist_set_column_width(GTK_CLIST(list), 1, 48);
gtk_clist_set_column_justification(GTK_CLIST(list), 0, GTK_JUSTIFY_RIGHT);
gtk_clist_set_column_justification(GTK_CLIST(list), 1, GTK_JUSTIFY_RIGHT);
gtk_signal_connect(GTK_OBJECT(list), "select_row",
GTK_SIGNAL_FUNC(select_row_cb), props);
gtk_clist_set_selection_mode(GTK_CLIST(list), GTK_SELECTION_SINGLE);
gtk_widget_show(list);
table = gtk_table_new(6, 3, FALSE);
gtk_container_set_border_width(GTK_CONTAINER(table), 10);
gtk_table_set_row_spacings(GTK_TABLE(table), 10);
gtk_table_set_col_spacings(GTK_TABLE(table), 10);
gtk_box_pack_start(GTK_BOX(hbox), table, FALSE, FALSE, FALSE);
gtk_widget_show(table);
create_label_in_table(table, 0, 0, "x:");
props->x = create_spin_button_in_table(table, 0, 1, 1, 0, max_width - 1);
gtk_signal_connect(GTK_OBJECT(props->x), "changed",
(GtkSignalFunc) x_changed_cb, (gpointer) props);
gtk_widget_set_usize(props->x, 64, -1);
create_label_in_table(table, 0, 2, _("pixels"));
create_label_in_table(table, 1, 0, "y:");
props->y = create_spin_button_in_table(table, 1, 1, 1, 0, max_height - 1);
gtk_signal_connect(GTK_OBJECT(props->y), "changed",
(GtkSignalFunc) y_changed_cb, (gpointer) props);
gtk_widget_set_usize(props->y, 64, -1);
create_label_in_table(table, 1, 2, _("pixels"));
props->update = gtk_button_new_with_label(_("Update"));
gtk_signal_connect(GTK_OBJECT(props->update), "clicked",
GTK_SIGNAL_FUNC(update_button_clicked), props);
gtk_table_attach_defaults(GTK_TABLE(table), props->update, 1, 2, 2, 3);
gtk_widget_show(props->update);
props->insert = gtk_button_new_with_label(_("Insert"));
gtk_signal_connect(GTK_OBJECT(props->insert), "clicked",
GTK_SIGNAL_FUNC(insert_button_clicked), props);
gtk_table_attach_defaults(GTK_TABLE(table), props->insert, 1, 2, 3, 4);
gtk_widget_show(props->insert);
props->append = gtk_button_new_with_label(_("Append"));
gtk_signal_connect(GTK_OBJECT(props->append), "clicked",
GTK_SIGNAL_FUNC(append_button_clicked), props);
gtk_table_attach_defaults(GTK_TABLE(table), props->append, 1, 2, 4, 5);
gtk_widget_show(props->append);
props->remove = gtk_button_new_with_label(_("Remove"));
gtk_signal_connect(GTK_OBJECT(props->remove), "clicked",
GTK_SIGNAL_FUNC(remove_button_clicked), props);
gtk_table_attach_defaults(GTK_TABLE(table), props->remove, 1, 2, 5, 6);
gtk_widget_show(props->remove);
props->timeout = 0;
return props;
}
static gint
update_timeout(gpointer data)
{
PolygonProperties_t *props = (PolygonProperties_t*) data;
polygon_fill_info_tab(props->obj, data);
return FALSE;
}
static void
polygon_update_info_widget(Object_t *obj, gpointer data)
{
PolygonProperties_t *props = (PolygonProperties_t*) data;
gtk_spin_button_set_value(GTK_SPIN_BUTTON(props->x), _sash_point->x);
gtk_spin_button_set_value(GTK_SPIN_BUTTON(props->y), _sash_point->y);
if (props->selected_row != _sash_index) {
props->selected_row = _sash_index;
gtk_clist_select_row(GTK_CLIST(props->list), _sash_index, -1);
}
if (props->timeout)
gtk_timeout_remove(props->timeout);
props->timeout = gtk_timeout_add(1000, update_timeout, data);
}
static void
polygon_fill_info_tab(Object_t *obj, gpointer data)
{
Polygon_t *polygon = ObjectToPolygon(obj);
PolygonProperties_t *props = (PolygonProperties_t*) data;
GList *p;
props->obj = obj;
gtk_clist_freeze(GTK_CLIST(props->list));
gtk_clist_clear(GTK_CLIST(props->list));
for (p = polygon->points; p; p = p->next) {
GdkPoint *point = (GdkPoint*) p->data;
char x[16], y[16];
char *text[2];
text[0] = x;
text[1] = y;
sprintf(x, "%d", point->x);
sprintf(y, "%d", point->y);
gtk_clist_append(GTK_CLIST(props->list), text);
}
gtk_clist_select_row(GTK_CLIST(props->list), _sash_index, -1);
gtk_clist_thaw(GTK_CLIST(props->list));
set_buttons_sensitivity(props);
}
static void
polygon_set_initial_focus(Object_t *obj, gpointer data)
{
PolygonProperties_t *props = (PolygonProperties_t*) data;
gtk_widget_grab_focus(props->x);
}
static void
polygon_update(Object_t* obj, gpointer data)
{
Polygon_t *polygon = ObjectToPolygon(obj);
PolygonProperties_t *props = (PolygonProperties_t*) data;
gint rows = GTK_CLIST(props->list)->rows;
int i;
g_list_free(polygon->points);
polygon->points = NULL;
for (i = 0; i < rows; i++) {
gchar *text;
GdkPoint *point = g_new(GdkPoint, 1);
gtk_clist_get_text(GTK_CLIST(props->list), i, 0, &text);
point->x = atoi(text);
gtk_clist_get_text(GTK_CLIST(props->list), i, 1, &text);
point->y = atoi(text);
polygon->points = g_list_append(polygon->points, point);
}
}
static void
polygon_write_csim(Object_t *obj, gpointer param, OutputFunc_t output)
{
Polygon_t *polygon = ObjectToPolygon(obj);
GList *p;
output(param, "\"POLY\" COORDS=\"");
for (p = polygon->points; p; p = p->next) {
GdkPoint *point = (GdkPoint*) p->data;
output(param, "%d,%d", point->x, point->y);
output(param, "%c", (p->next) ? ',' : '"');
}
}
static void
polygon_write_cern(Object_t *obj, gpointer param, OutputFunc_t output)
{
Polygon_t *polygon = ObjectToPolygon(obj);
GList *p;
GdkPoint *first = (GdkPoint*) polygon->points->data;
output(param, "poly ");
for (p = polygon->points; p; p = p->next) {
GdkPoint *point = (GdkPoint*) p->data;
output(param, "(%d,%d) ", point->x, point->y);
}
output(param, "(%d,%d)", first->x, first->y);
}
static void
polygon_write_ncsa(Object_t *obj, gpointer param, OutputFunc_t output)
{
Polygon_t *polygon = ObjectToPolygon(obj);
GList *p;
GdkPoint *first = (GdkPoint*) polygon->points->data;
output(param, "poly %s", obj->url);
for (p = polygon->points; p; p = p->next) {
GdkPoint *point = (GdkPoint*) p->data;
output(param, " %d,%d", point->x, point->y);
}
output(param, " %d,%d", first->x, first->y);
}
static gint _insert_edge;
static gint _insert_x;
static gint _insert_y;
static void
polygon_insert_point(GtkWidget *widget, gpointer data)
{
Command_t *command = insert_point_command_new(get_popup_object(), _insert_x,
_insert_y, _insert_edge);
command_execute(command);
}
static void
polygon_delete_point(GtkWidget *widget, gpointer data)
{
Command_t *command = delete_point_command_new(get_popup_object(),
_sash_point);
command_execute(command);
}
static gboolean
point_near_edge(GdkPoint *first, GdkPoint *second, gint x, gint y)
{
gint den, nom;
gdouble u;
den = (first->x - x) * (first->x - second->x) +
(first->y - y) * (first->y - second->y);
nom = (second->x - first->x) * (second->x - first->x) +
(second->y - first->y) * (second->y - first->y);
u = (gdouble) den / nom;
if (u >= 0.0 && u <= 1.0) {
gint sx = first->x + (gint) (u * (second->x - first->x)) - x;
gint sy = first->y + (gint) (u * (second->y - first->y)) - y;
return sx * sx + sy * sy <= 25; /* Fix me! */
}
return 0;
}
static gint
polygon_near_edge(Object_t *obj, gint x, gint y)
{
Polygon_t *polygon = ObjectToPolygon(obj);
GList *p = polygon->points;
GdkPoint *first = (GdkPoint*) p->data;
GdkPoint *prev = first;
gint n = 1;
for (p = p->next; p; p = p->next, n++) {
GdkPoint *next = (GdkPoint*) p->data;
if (point_near_edge(prev, next, x, y))
return n;
prev = next;
}
return (point_near_edge(prev, first, x, y)) ? n + 1 : 0;
}
static void
polygon_do_popup(Object_t *obj, GdkEventButton *event)
{
gint x = get_real_coord((gint) event->x);
gint y = get_real_coord((gint) event->y);
if (polygon_near_sash(obj, x, y)) {
static ObjectPopup_t *delete_popup;
if (!delete_popup) {
delete_popup = make_object_popup();
object_popup_prepend_menu(delete_popup, _("Delete Point"),
polygon_delete_point, delete_popup);
}
object_handle_popup(delete_popup, obj, event);
} else {
_insert_edge = polygon_near_edge(obj, x, y);
if (_insert_edge) {
static ObjectPopup_t *insert_popup;
_insert_x = x;
_insert_y = y;
if (!insert_popup) {
insert_popup = make_object_popup();
object_popup_prepend_menu(insert_popup, _("Insert Point"),
polygon_insert_point, insert_popup);
}
object_handle_popup(insert_popup, obj, event);
} else {
object_do_popup(obj, event);
}
}
}
static char**
polygon_get_icon_data(void)
{
return polygon_xpm;
}
static GList *_prev_link;
static gboolean
polygon_factory_finish(Object_t *obj, gint x, gint y)
{
Polygon_t *polygon = ObjectToPolygon(obj);
GdkPoint *prev_point = (GdkPoint*) _prev_link->data;
if (x == prev_point->x && y == prev_point->y) {
polygon_remove_last_point(polygon);
return TRUE;
} else {
g_list_append(polygon->points, new_point(x, y));
_prev_link = _prev_link->next;
}
return FALSE;
}
static gboolean
polygon_factory_cancel(GdkEventButton *event, Object_t *obj)
{
if (event->state & GDK_SHIFT_MASK) {
return TRUE;
} else {
Polygon_t *polygon = ObjectToPolygon(obj);
GList *link = _prev_link;
_prev_link = _prev_link->prev;
g_free((GdkPoint*) link->data);
polygon->points = g_list_remove_link(polygon->points, link);
}
return _prev_link == NULL;
}
static Object_t*
polygon_factory_create_object(gint x, gint y)
{
GList *points;
points = _prev_link = g_list_append(NULL, new_point(x, y));
points = g_list_append(points, new_point(x, y));
return create_polygon(points);
}
static void
polygon_factory_set_xy(Object_t *obj, guint state, gint x, gint y)
{
Polygon_t *polygon = ObjectToPolygon(obj);
GList *last = g_list_last(polygon->points);
GdkPoint *point = (GdkPoint*) last->data;
GdkPoint *prev = (GdkPoint*) last->prev->data;
point->x = x;
point->y = y;
main_set_dimension(x - prev->x, y - prev->y);
}
static ObjectFactory_t polygon_factory = {
NULL, /* Object pointer */
polygon_factory_finish,
polygon_factory_cancel,
polygon_factory_create_object,
polygon_factory_set_xy
};
ObjectFactory_t*
get_polygon_factory(guint state)
{
return &polygon_factory;
}
void
polygon_remove_last_point(Polygon_t *polygon)
{
GList *last = g_list_last(polygon->points);
g_free((GdkPoint*) last->data);
polygon->points = g_list_remove_link(polygon->points, last);
}
GdkPoint*
new_point(gint x, gint y)
{
GdkPoint *point = g_new(GdkPoint, 1);
point->x = x;
point->y = y;
return point;
}
Reference in New Issue View Git Blame Copy Permalink