gimp/plug-ins/imagemap/imap_grid.c

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1999-09-07 08:03:20 +08:00
/*
* 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 "imap_grid.h"
#include "imap_main.h"
#include "imap_menu.h"
#include "imap_popup.h"
#include "imap_preview.h"
#include "imap_table.h"
#include "imap_toolbar.h"
typedef enum {GRID_HIDDEN, GRID_LINES, GRID_CROSSES} GridType_t;
static GdkGC *grid_gc;
static gboolean grid_snap = FALSE;
static gint grid_width = 15;
static gint grid_height = 15;
static gint grid_left = 0;
static gint grid_top = 0;
static GridType_t grid_type = GRID_LINES;
static void
grid_settings_ok_cb(gpointer data)
{
GridDialog_t *param = (GridDialog_t*) data;
grid_snap = GTK_TOGGLE_BUTTON(param->snap)->active;
grid_width = gtk_spin_button_get_value_as_int(
GTK_SPIN_BUTTON(param->width));
grid_height = gtk_spin_button_get_value_as_int(
GTK_SPIN_BUTTON(param->height));
grid_left = gtk_spin_button_get_value_as_int(
GTK_SPIN_BUTTON(param->left));
grid_top = gtk_spin_button_get_value_as_int(
GTK_SPIN_BUTTON(param->top));
main_toolbar_set_grid(grid_snap);
popup_check_grid(grid_snap);
menu_check_grid(grid_snap);
redraw_preview();
}
static void
snap_toggled_cb(GtkWidget *widget, gpointer data)
{
GridDialog_t *param = (GridDialog_t*) data;
gint sensitive = GTK_TOGGLE_BUTTON(widget)->active;
gtk_widget_set_sensitive(param->type_frame, sensitive);
gtk_widget_set_sensitive(param->granularity_frame, sensitive);
gtk_widget_set_sensitive(param->offset_frame, sensitive);
}
static void
type_toggled_cb(GtkWidget *widget, gpointer data)
{
if (GTK_WIDGET_STATE(widget) & GTK_STATE_SELECTED)
grid_type = (gint) data;
}
static GridDialog_t*
create_grid_settings_dialog()
{
GridDialog_t *data = g_new(GridDialog_t, 1);
DefaultDialog_t *dialog;
GtkWidget *main_table, *table;
GtkWidget *frame;
GtkWidget *hbox;
GtkWidget *button;
GSList* group;
data->dialog = dialog = make_default_dialog("Grid Settings");
default_dialog_set_ok_cb(dialog, grid_settings_ok_cb, (gpointer) data);
main_table = gtk_table_new(3, 2, FALSE);
gtk_container_set_border_width(GTK_CONTAINER(main_table), 10);
gtk_table_set_row_spacings(GTK_TABLE(main_table), 10);
gtk_table_set_col_spacings(GTK_TABLE(main_table), 10);
gtk_box_pack_start(GTK_BOX(GTK_DIALOG(dialog->dialog)->vbox),
main_table, TRUE, TRUE, 10);
gtk_widget_show(main_table);
data->snap = gtk_check_button_new_with_label("Snap-To Grid Enabled");
gtk_signal_connect(GTK_OBJECT(data->snap), "toggled",
(GtkSignalFunc) snap_toggled_cb, data);
gtk_table_attach_defaults(GTK_TABLE(main_table), data->snap, 0, 1, 0, 1);
gtk_widget_show(data->snap);
data->type_frame = frame = gtk_frame_new("Grid Visibility and Type");
gtk_widget_show(frame);
gtk_table_attach_defaults(GTK_TABLE(main_table), frame, 0, 2, 1, 2);
hbox = gtk_hbox_new(FALSE, 1);
gtk_container_add(GTK_CONTAINER(frame), hbox);
gtk_widget_show(hbox);
data->hidden = button = gtk_radio_button_new_with_label(NULL, "Hidden");
gtk_signal_connect(GTK_OBJECT(button), "toggled",
(GtkSignalFunc) type_toggled_cb, (gpointer) GRID_HIDDEN);
gtk_box_pack_start(GTK_BOX(hbox), button, TRUE, TRUE, 10);
gtk_widget_show(button);
group = gtk_radio_button_group(GTK_RADIO_BUTTON(button));
data->lines = button = gtk_radio_button_new_with_label(group, "Lines");
gtk_signal_connect(GTK_OBJECT(button), "toggled",
(GtkSignalFunc) type_toggled_cb, (gpointer) GRID_LINES);
gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(button), TRUE);
gtk_box_pack_start(GTK_BOX(hbox), button, TRUE, TRUE, 10);
gtk_widget_show(button);
group = gtk_radio_button_group(GTK_RADIO_BUTTON(button));
data->crosses = button = gtk_radio_button_new_with_label(group, "Crosses");
gtk_signal_connect(GTK_OBJECT(button), "toggled",
(GtkSignalFunc) type_toggled_cb,
(gpointer) GRID_CROSSES);
gtk_box_pack_start(GTK_BOX(hbox), button, TRUE, TRUE, 10);
gtk_widget_show(button);
data->granularity_frame = frame = gtk_frame_new("Grid Granularity");
gtk_table_attach_defaults(GTK_TABLE(main_table), frame, 0, 1, 2, 3);
table = gtk_table_new(2, 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_container_add(GTK_CONTAINER(frame), table);
create_label_in_table(table, 0, 0, "Width");
data->width = create_spin_button_in_table(table, 0, 1, 15, 1, 100);
create_label_in_table(table, 0, 2, "pixels");
create_label_in_table(table, 1, 0, "Height");
data->height = create_spin_button_in_table(table, 1, 1, 15, 1, 100);
create_label_in_table(table, 1, 2, "pixels");
gtk_widget_show(table);
gtk_widget_show(frame);
data->offset_frame = frame = gtk_frame_new("Grid Offset");
gtk_table_attach_defaults(GTK_TABLE(main_table), frame, 1, 2, 2, 3);
table = gtk_table_new(2, 2, 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_container_add(GTK_CONTAINER(frame), table);
data->left = create_spin_button_in_table(table, 0, 0, 0, 0, 100);
create_label_in_table(table, 0, 1, "pixels from left");
data->top = create_spin_button_in_table(table, 1, 0, 0, 0, 100);
create_label_in_table(table, 1, 1, "pixels from top");
snap_toggled_cb(data->snap, data);
gtk_widget_show(table);
gtk_widget_show(frame);
return data;
}
void
do_grid_settings_dialog(void)
{
static GridDialog_t* dialog;
GtkWidget *type;
if (!dialog)
dialog = create_grid_settings_dialog();
gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(dialog->snap), grid_snap);
gtk_spin_button_set_value(GTK_SPIN_BUTTON(dialog->width), grid_width);
gtk_spin_button_set_value(GTK_SPIN_BUTTON(dialog->height), grid_height);
gtk_spin_button_set_value(GTK_SPIN_BUTTON(dialog->left), grid_left);
gtk_spin_button_set_value(GTK_SPIN_BUTTON(dialog->top), grid_top);
if (grid_type == GRID_HIDDEN)
type = dialog->hidden;
else if (grid_type == GRID_LINES)
type = dialog->lines;
else
type = dialog->crosses;
gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(type), TRUE);
default_dialog_show(dialog->dialog);
}
static void
draw_lines(GdkWindow *window, GdkGC* gc, gint width, gint height)
{
gint x, y;
for (x = grid_left; x < width; x += grid_width)
draw_line(window, grid_gc, x, 1, x, height);
for (y = grid_top; y < height; y += grid_height)
draw_line(window, grid_gc, 1, y, width, y);
}
static void
draw_crosses(GdkWindow *window, GdkGC* gc, gint width, gint height)
{
gint x, y;
for (x = grid_left; x < width; x += grid_width) {
for (y = grid_top; y < height; y += grid_height) {
draw_line(window, gc, x - 3, y, x + 3, y);
draw_line(window, gc, x, y - 3, x, y + 3);
}
}
}
void
draw_grid(GtkWidget *preview)
{
if (grid_snap && grid_type != GRID_HIDDEN) {
gint width = preview_get_width(preview);
gint height = preview_get_height(preview);
if (!grid_gc) {
grid_gc = gdk_gc_new(preview->window);
gdk_gc_set_line_attributes(grid_gc, 1, GDK_LINE_ON_OFF_DASH,
GDK_CAP_BUTT, GDK_JOIN_BEVEL);
}
gdk_gc_set_function(preview->style->black_gc, GDK_INVERT);
if (grid_type == GRID_LINES)
draw_lines(preview->window, preview->style->black_gc, width, height);
else
draw_crosses(preview->window, preview->style->black_gc, width,
height);
gdk_gc_set_function(preview->style->black_gc, GDK_COPY);
}
}
gboolean
toggle_grid(void)
{
grid_snap = !grid_snap;
redraw_preview();
return grid_snap;
}
void
round_to_grid(gint *x, gint *y)
{
if (grid_snap) {
*x = grid_left + (*x - grid_left + grid_width / 2) / grid_width
* grid_width;
*y = grid_top + (*y - grid_top + grid_height / 2) / grid_height
* grid_height;
}
}