gimp/plug-ins/imagemap/imap_circle.c

406 lines
12 KiB
C

/*
* This is a plug-in for GIMP.
*
* Generates clickable image maps.
*
* Copyright (C) 1998-2004 Maurits Rijk m.rijk@chello.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 3 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, see <https://www.gnu.org/licenses/>.
*
*/
#include "config.h"
#include <math.h>
#include <stdlib.h>
#include <gtk/gtk.h>
#include "imap_circle.h"
#include "imap_icons.h"
#include "imap_main.h"
#include "imap_misc.h"
#include "imap_object_popup.h"
#include "imap_ui_grid.h"
#include "libgimp/stdplugins-intl.h"
static gboolean circle_is_valid(Object_t *obj);
static Object_t *circle_clone(Object_t *obj);
static void circle_assign(Object_t *obj, Object_t *des);
static void circle_draw(Object_t* obj, cairo_t *cr);
static void circle_draw_sashes(Object_t* obj, cairo_t *cr);
static MoveSashFunc_t circle_near_sash(Object_t *obj, gint x, gint y);
static gboolean circle_point_is_on(Object_t *obj, gint x, gint y);
static void circle_get_dimensions(Object_t *obj, gint *x, gint *y,
gint *width, gint *height);
static void circle_resize(Object_t *obj, gint percentage_x, gint percentage_y);
static void circle_move(Object_t *obj, gint dx, gint dy);
static gpointer circle_create_info_widget(GtkWidget *frame);
static void circle_fill_info_tab(Object_t *obj, gpointer data);
static void circle_set_initial_focus(Object_t *obj, gpointer data);
static void circle_update(Object_t* obj, gpointer data);
static void circle_write_csim(Object_t* obj, gpointer param,
OutputFunc_t output);
static void circle_write_cern(Object_t* obj, gpointer param,
OutputFunc_t output);
static void circle_write_ncsa(Object_t* obj, gpointer param,
OutputFunc_t output);
static const gchar* circle_get_icon_name(void);
static ObjectClass_t circle_class = {
N_("C_ircle"),
NULL, /* info_dialog */
circle_is_valid,
NULL, /* circle_destruct */
circle_clone,
circle_assign,
NULL, /* circle_normalize */
circle_draw,
circle_draw_sashes,
circle_near_sash,
circle_point_is_on,
circle_get_dimensions,
circle_resize,
circle_move,
circle_create_info_widget,
circle_fill_info_tab, /* circle_update_info_widget */
circle_fill_info_tab,
circle_set_initial_focus,
circle_update,
circle_write_csim,
circle_write_cern,
circle_write_ncsa,
object_do_popup,
circle_get_icon_name
};
Object_t*
create_circle(gint x, gint y, gint r)
{
Circle_t *circle = g_new(Circle_t, 1);
circle->x = x;
circle->y = y;
circle->r = r;
return object_init(&circle->obj, &circle_class);
}
static gboolean
circle_is_valid(Object_t *obj)
{
return ObjectToCircle(obj)->r > 0;
}
static Object_t*
circle_clone(Object_t *obj)
{
Circle_t *circle = ObjectToCircle(obj);
Circle_t *clone = g_new(Circle_t, 1);
clone->x = circle->x;
clone->y = circle->y;
clone->r = circle->r;
return &clone->obj;
}
static void
circle_assign(Object_t *obj, Object_t *des)
{
Circle_t *src_circle = ObjectToCircle(obj);
Circle_t *des_circle = ObjectToCircle(des);
des_circle->x = src_circle->x;
des_circle->y = src_circle->y;
des_circle->r = src_circle->r;
}
static void
circle_draw(Object_t *obj, cairo_t *cr)
{
Circle_t *circle = ObjectToCircle(obj);
draw_circle(cr, circle->x, circle->y, circle->r);
}
static void
circle_draw_sashes(Object_t *obj, cairo_t *cr)
{
Circle_t *circle = ObjectToCircle(obj);
draw_sash(cr, circle->x - circle->r, circle->y - circle->r);
draw_sash(cr, circle->x + circle->r, circle->y - circle->r);
draw_sash(cr, circle->x - circle->r, circle->y + circle->r);
draw_sash(cr, circle->x + circle->r, circle->y + circle->r);
}
static gint sash_x;
static gint sash_y;
static void
move_sash(Object_t *obj, gint dx, gint dy)
{
Circle_t *circle = ObjectToCircle(obj);
gint rx, ry;
sash_x += dx;
sash_y += dy;
rx = abs(circle->x - sash_x);
ry = abs(circle->y - sash_y);
circle->r = (rx > ry) ? rx : ry;
}
static void
circle_resize(Object_t *obj, gint percentage_x, gint percentage_y)
{
Circle_t *circle = ObjectToCircle(obj);
circle->x = circle->x * percentage_x / 100;
circle->y = circle->y * percentage_y / 100;
circle->r = circle->r * ((percentage_x < percentage_y)
? percentage_x : percentage_y) / 100;
}
static MoveSashFunc_t
circle_near_sash(Object_t *obj, gint x, gint y)
{
Circle_t *circle = ObjectToCircle(obj);
sash_x = x;
sash_y = y;
if (near_sash(circle->x - circle->r, circle->y - circle->r, x, y) ||
near_sash(circle->x + circle->r, circle->y - circle->r, x, y) ||
near_sash(circle->x - circle->r, circle->y + circle->r, x, y) ||
near_sash(circle->x + circle->r, circle->y + circle->r, x, y))
return move_sash;
return NULL;
}
static gboolean
circle_point_is_on(Object_t *obj, gint x, gint y)
{
Circle_t *circle = ObjectToCircle(obj);
x -= circle->x;
y -= circle->y;
return x * x + y * y <= circle->r * circle->r;
}
static void
circle_get_dimensions(Object_t *obj, gint *x, gint *y,
gint *width, gint *height)
{
Circle_t *circle = ObjectToCircle(obj);
*x = circle->x - circle->r;
*y = circle->y - circle->r;
*width = *height = 2 * circle->r;
}
static void
circle_move(Object_t *obj, gint dx, gint dy)
{
Circle_t *circle = ObjectToCircle(obj);
circle->x += dx;
circle->y += dy;
}
typedef struct {
Object_t *obj;
GtkWidget *x;
GtkWidget *y;
GtkWidget *r;
} CircleProperties_t;
static void
x_changed_cb(GtkWidget *widget, gpointer data)
{
Object_t *obj = ((CircleProperties_t*) data)->obj;
gint x = gtk_spin_button_get_value_as_int(GTK_SPIN_BUTTON(widget));
ObjectToCircle(obj)->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 = ((CircleProperties_t*) data)->obj;
gint y = gtk_spin_button_get_value_as_int(GTK_SPIN_BUTTON(widget));
ObjectToCircle(obj)->y = y;
edit_area_info_dialog_emit_geometry_signal(obj->class->info_dialog);
}
static void
r_changed_cb(GtkWidget *widget, gpointer data)
{
Object_t *obj = ((CircleProperties_t*) data)->obj;
gint r = gtk_spin_button_get_value_as_int(GTK_SPIN_BUTTON(widget));
ObjectToCircle(obj)->r = r;
edit_area_info_dialog_emit_geometry_signal(obj->class->info_dialog);
}
static gpointer
circle_create_info_widget(GtkWidget *frame)
{
CircleProperties_t *props = g_new(CircleProperties_t, 1);
GtkWidget *grid, *label;
gint max_width = get_image_width();
gint max_height = get_image_height();
grid = gtk_grid_new ();
gtk_container_add (GTK_CONTAINER(frame), grid);
gtk_grid_set_row_spacing (GTK_GRID (grid), 6);
gtk_grid_set_column_spacing (GTK_GRID (grid), 6);
gtk_widget_show (grid);
label = create_label_in_grid (grid, 0, 0, _("Center _x:"));
props->x = create_spin_button_in_grid (grid, label, 0, 1, 1, 0,
max_width - 1);
g_signal_connect(props->x, "value-changed",
G_CALLBACK (x_changed_cb), (gpointer) props);
create_label_in_grid (grid, 0, 2, _("pixels"));
label = create_label_in_grid (grid, 1, 0, _("Center _y:"));
props->y = create_spin_button_in_grid (grid, label, 1, 1, 1, 0,
max_height - 1);
g_signal_connect(props->y, "value-changed",
G_CALLBACK (y_changed_cb), (gpointer) props);
create_label_in_grid (grid, 1, 2, _("pixels"));
label = create_label_in_grid (grid, 2, 0, _("_Radius:"));
props->r = create_spin_button_in_grid (grid, label, 2, 1, 1, 1, G_MAXINT);
g_signal_connect(props->r, "value-changed",
G_CALLBACK (r_changed_cb), (gpointer) props);
create_label_in_grid (grid, 2, 2, _("pixels"));
return props;
}
static void
circle_fill_info_tab(Object_t *obj, gpointer data)
{
Circle_t *circle = ObjectToCircle(obj);
CircleProperties_t *props = (CircleProperties_t*) data;
props->obj = obj;
gtk_spin_button_set_value(GTK_SPIN_BUTTON(props->x), circle->x);
gtk_spin_button_set_value(GTK_SPIN_BUTTON(props->y), circle->y);
gtk_spin_button_set_value(GTK_SPIN_BUTTON(props->r), circle->r);
}
static void
circle_set_initial_focus(Object_t *obj, gpointer data)
{
CircleProperties_t *props = (CircleProperties_t*) data;
gtk_widget_grab_focus(props->x);
}
static void
circle_update(Object_t* obj, gpointer data)
{
Circle_t *circle = ObjectToCircle(obj);
CircleProperties_t *props = (CircleProperties_t*) data;
circle->x = gtk_spin_button_get_value_as_int(GTK_SPIN_BUTTON(props->x));
circle->y = gtk_spin_button_get_value_as_int(GTK_SPIN_BUTTON(props->y));
circle->r = gtk_spin_button_get_value_as_int(GTK_SPIN_BUTTON(props->r));
}
static void
circle_write_csim(Object_t *obj, gpointer param, OutputFunc_t output)
{
Circle_t *circle = ObjectToCircle(obj);
output(param, "\"circle\" coords=\"%d,%d,%d\"", circle->x, circle->y,
circle->r);
}
static void
circle_write_cern(Object_t *obj, gpointer param, OutputFunc_t output)
{
Circle_t *circle = ObjectToCircle(obj);
output(param, "circ (%d,%d) %d", circle->x, circle->y, circle->r);
}
static void
circle_write_ncsa(Object_t *obj, gpointer param, OutputFunc_t output)
{
Circle_t *circle = ObjectToCircle(obj);
output(param, "circle %s %d,%d %d,%d", obj->url,
circle->x, circle->y, circle->x, circle->y + circle->r);
}
static const gchar*
circle_get_icon_name(void)
{
return IMAP_CIRCLE;
}
static gint _start_x, _start_y;
static Object_t*
circle_factory_create_object1(gint x, gint y)
{
_start_x = x;
_start_y = y;
return create_circle(x, y, 0);
}
static void
circle_factory_set_xy1(Object_t *obj, guint state, gint x, gint y)
{
Circle_t *circle = ObjectToCircle(obj);
circle->x = (_start_x + x) / 2;
circle->y = (_start_y + y) / 2;
x -= _start_x;
y -= _start_y;
circle->r = (gint) sqrt(x * x + y * y) / 2;
main_set_dimension(circle->r, circle->r);
}
static ObjectFactory_t circle_factory1 = {
NULL, /* Object pointer */
NULL, /* Finish func */
NULL, /* Cancel func */
circle_factory_create_object1,
circle_factory_set_xy1
};
static Object_t*
circle_factory_create_object2(gint x, gint y)
{
return create_circle(x, y, 0);
}
static void
circle_factory_set_xy2(Object_t *obj, guint state, gint x, gint y)
{
Circle_t *circle = ObjectToCircle(obj);
x -= circle->x;
y -= circle->y;
circle->r = (gint) sqrt(x * x + y * y);
main_set_dimension(circle->r, circle->r);
}
static ObjectFactory_t circle_factory2 = {
NULL, /* Object pointer */
NULL, /* Finish func */
NULL, /* Cancel func */
circle_factory_create_object2,
circle_factory_set_xy2
};
ObjectFactory_t*
get_circle_factory(guint state)
{
return (state & GDK_SHIFT_MASK) ? &circle_factory1 : &circle_factory2;
}