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gimp/app/resize.c

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/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* 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 <math.h>
#include <stdio.h>
#include <stdlib.h>
#include "appenv.h"
#include "resize.h"
#include "actionarea.h"
#include "libgimp/gimpintl.h"
#define EVENT_MASK GDK_EXPOSURE_MASK | GDK_BUTTON_PRESS_MASK
#define DRAWING_AREA_SIZE 200
#define TEXT_WIDTH 35
typedef struct _ResizePrivate ResizePrivate;
struct _ResizePrivate
{
GtkWidget *width_text;
GtkWidget *height_text;
GtkWidget *ratio_x_text;
GtkWidget *ratio_y_text;
GtkWidget *off_x_text;
GtkWidget *off_y_text;
GtkWidget *drawing_area;
GtkObject *object;
guint object_destroy_handler;
double ratio;
int constrain;
int old_width, old_height;
int area_width, area_height;
int start_x, start_y;
int orig_x, orig_y;
};
static void resize_draw (Resize *);
static int resize_bound_off_x (Resize *, int);
static int resize_bound_off_y (Resize *, int);
static void off_x_update (GtkWidget *w, gpointer data);
static void off_y_update (GtkWidget *w, gpointer data);
static void width_update (GtkWidget *w, gpointer data);
static void height_update (GtkWidget *w, gpointer data);
static void ratio_x_update (GtkWidget *w, gpointer data);
static void ratio_y_update (GtkWidget *w, gpointer data);
static void constrain_update (GtkWidget *w, gpointer data);
static gint resize_events (GtkWidget *area, GdkEvent *event);
Resize *
resize_widget_new (ResizeType type,
ResizeTarget target,
GtkObject *object,
int width,
int height,
float resolution_x,
float resolution_y,
GtkSignalFunc ok_cb,
GtkSignalFunc cancel_cb,
gint (*delete_cb) (GtkWidget *,
GdkEvent *,
gpointer),
gpointer user_data)
{
static ActionAreaItem action_items[2] =
{
{ N_("OK"), NULL, NULL, NULL },
{ N_("Cancel"), NULL, NULL, NULL }
};
Resize *resize;
ResizePrivate *private;
GtkWidget *vbox;
GtkWidget *hbox;
GtkWidget *label;
GtkWidget *frame;
GtkWidget *constrain;
GtkWidget *table;
char size[12];
char ratio_text[12];
table = NULL;
frame = NULL;
resize = g_new (Resize, 1);
private = g_new (ResizePrivate, 1);
resize->type = type;
resize->private_part = private;
resize->width = width;
resize->height = height;
resize->resolution_x = resolution_x;
resize->resolution_y = resolution_y;
resize->ratio_x = 1.0;
resize->ratio_y = 1.0;
resize->off_x = 0;
resize->off_y = 0;
private->old_width = width;
private->old_height = height;
private->constrain = TRUE;
private->object = NULL;
/* Get the image width and height variables, based on the gimage */
if (width > height)
private->ratio = (double) DRAWING_AREA_SIZE / (double) width;
else
private->ratio = (double) DRAWING_AREA_SIZE / (double) height;
private->area_width = (int) (private->ratio * width);
private->area_height = (int) (private->ratio * height);
/* dialog box */
{
const char *wmclass = NULL;
const char *window_title = NULL;
switch (type) {
case ScaleWidget:
switch (target) {
case ResizeLayer:
wmclass = "scale_layer";
window_title = _("Scale Layer");
break;
case ResizeImage:
wmclass = "image_scale";
window_title = _("Image Scale");
break;
}
frame = gtk_frame_new (_("Scale"));
table = gtk_table_new (4, 2, TRUE);
break;
case ResizeWidget:
switch (target) {
case ResizeLayer:
wmclass = "resize_layer";
window_title = _("Resize Layer");
break;
case ResizeImage:
wmclass = "image_resize";
window_title = _("Image Resize");
break;
}
frame = gtk_frame_new (_("Resize"));
table = gtk_table_new (6, 2, TRUE);
break;
}
resize->resize_shell = gtk_dialog_new();
gtk_window_set_wmclass (GTK_WINDOW (resize->resize_shell), wmclass,"Gimp");
gtk_window_set_title (GTK_WINDOW (resize->resize_shell), window_title);
gtk_window_set_policy(GTK_WINDOW (resize->resize_shell), FALSE,FALSE,TRUE);
gtk_window_position (GTK_WINDOW (resize->resize_shell), GTK_WIN_POS_MOUSE);
}
/* handle the wm close singal */
if (delete_cb)
gtk_signal_connect (GTK_OBJECT (resize->resize_shell), "delete_event",
GTK_SIGNAL_FUNC (delete_cb), user_data);
/* handle the image disappearing under our feet */
if (object)
{
const char *signame;
signame = (target == ResizeLayer)? "removed" : "destroy";
private->object = object;
private->object_destroy_handler = gtk_signal_connect(GTK_OBJECT (object),
signame,
cancel_cb, user_data);
}
vbox = gtk_vbox_new (FALSE, 1);
gtk_box_pack_start (GTK_BOX (GTK_DIALOG (resize->resize_shell)->vbox),
vbox, TRUE, TRUE, 0);
gtk_container_set_border_width (GTK_CONTAINER (vbox), 4);
gtk_widget_show (vbox);
gtk_box_pack_start (GTK_BOX (vbox), frame, TRUE, TRUE, 0);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_ETCHED_IN);
gtk_widget_show (frame);
/* the main vbox */
vbox = gtk_vbox_new (FALSE, 1);
gtk_container_set_border_width (GTK_CONTAINER (vbox), 5);
gtk_container_add (GTK_CONTAINER (frame), vbox);
gtk_container_set_border_width (GTK_CONTAINER (table), 2);
gtk_box_pack_start (GTK_BOX (vbox), table, TRUE, TRUE, 0);
/* the width label and entry */
sprintf (size, "%d", width);
label = gtk_label_new (_("New width:"));
gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
gtk_table_attach (GTK_TABLE (table), label, 0, 1, 0, 1,
GTK_SHRINK | GTK_FILL, GTK_SHRINK, 2, 2);
gtk_widget_show (label);
private->width_text = gtk_entry_new ();
gtk_table_attach (GTK_TABLE (table), private->width_text, 1, 2, 0, 1,
GTK_SHRINK | GTK_FILL, GTK_SHRINK, 2, 2);
gtk_widget_set_usize (private->width_text, TEXT_WIDTH, 25);
gtk_entry_set_text (GTK_ENTRY (private->width_text), size);
gtk_signal_connect (GTK_OBJECT (private->width_text), "changed",
(GtkSignalFunc) width_update,
resize);
gtk_widget_show (private->width_text);
/* the height label and entry */
sprintf (size, "%d", height);
label = gtk_label_new (_("New height:"));
gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
gtk_table_attach (GTK_TABLE (table), label, 0, 1, 1, 2,
GTK_SHRINK | GTK_FILL, GTK_SHRINK, 2, 2);
gtk_widget_show (label);
private->height_text = gtk_entry_new ();
gtk_table_attach (GTK_TABLE (table), private->height_text, 1, 2, 1, 2,
GTK_SHRINK | GTK_FILL, GTK_SHRINK, 2, 2);
gtk_widget_set_usize (private->height_text, TEXT_WIDTH, 25);
gtk_entry_set_text (GTK_ENTRY (private->height_text), size);
gtk_signal_connect (GTK_OBJECT (private->height_text), "changed",
(GtkSignalFunc) height_update,
resize);
gtk_widget_show (private->height_text);
/* the x scale ratio label and entry */
sprintf (ratio_text, "%0.4f", resize->ratio_x);
label = gtk_label_new (_("X ratio:"));
gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
gtk_table_attach (GTK_TABLE (table), label, 0, 1, 2, 3,
GTK_SHRINK | GTK_FILL, GTK_SHRINK, 2, 2);
gtk_widget_show (label);
private->ratio_x_text = gtk_entry_new ();
gtk_table_attach (GTK_TABLE (table), private->ratio_x_text, 1, 2, 2, 3,
GTK_SHRINK | GTK_FILL, GTK_SHRINK, 2, 2);
gtk_widget_set_usize (private->ratio_x_text, TEXT_WIDTH, 25);
gtk_entry_set_text (GTK_ENTRY (private->ratio_x_text), ratio_text);
gtk_signal_connect (GTK_OBJECT (private->ratio_x_text), "changed",
(GtkSignalFunc) ratio_x_update,
resize);
gtk_widget_show (private->ratio_x_text);
/* the y scale ratio label and entry */
sprintf (ratio_text, "%0.4f", resize->ratio_y);
label = gtk_label_new (_("Y ratio:"));
gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
gtk_table_attach (GTK_TABLE (table), label, 0, 1, 3, 4,
GTK_SHRINK | GTK_FILL, GTK_SHRINK, 2, 2);
gtk_widget_show (label);
private->ratio_y_text = gtk_entry_new ();
gtk_table_attach (GTK_TABLE (table), private->ratio_y_text, 1, 2, 3, 4,
GTK_SHRINK | GTK_FILL, GTK_SHRINK, 2, 2);
gtk_widget_set_usize (private->ratio_y_text, TEXT_WIDTH, 25);
gtk_entry_set_text (GTK_ENTRY (private->ratio_y_text), ratio_text);
gtk_signal_connect (GTK_OBJECT (private->ratio_y_text), "changed",
(GtkSignalFunc) ratio_y_update,
resize);
gtk_widget_show (private->ratio_y_text);
if (type == ResizeWidget)
{
/* the off_x label and entry */
sprintf (size, "%d", 0);
label = gtk_label_new (_("Offset X:"));
gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
gtk_table_attach (GTK_TABLE (table), label, 0, 1, 4, 5,
GTK_SHRINK | GTK_FILL, GTK_SHRINK, 2, 2);
gtk_widget_show (label);
private->off_x_text = gtk_entry_new ();
gtk_table_attach (GTK_TABLE (table), private->off_x_text, 1, 2, 4, 5,
GTK_SHRINK | GTK_FILL, GTK_SHRINK, 2, 2);
gtk_widget_set_usize (private->off_x_text, TEXT_WIDTH, 25);
gtk_entry_set_text (GTK_ENTRY (private->off_x_text), size);
gtk_signal_connect (GTK_OBJECT (private->off_x_text), "changed",
(GtkSignalFunc) off_x_update,
resize);
gtk_widget_show (private->off_x_text);
/* the off_y label and entry */
sprintf (size, "%d", 0);
label = gtk_label_new (_("Offset Y:"));
gtk_misc_set_alignment (GTK_MISC (label), 0.0, 0.5);
gtk_table_attach (GTK_TABLE (table), label, 0, 1, 5, 6,
GTK_SHRINK | GTK_FILL, GTK_SHRINK, 2, 2);
gtk_widget_show (label);
private->off_y_text = gtk_entry_new ();
gtk_table_attach (GTK_TABLE (table), private->off_y_text, 1, 2, 5, 6,
GTK_SHRINK | GTK_FILL, GTK_SHRINK, 2, 2);
gtk_widget_set_usize (private->off_y_text, TEXT_WIDTH, 25);
gtk_entry_set_text (GTK_ENTRY (private->off_y_text), size);
gtk_signal_connect (GTK_OBJECT (private->off_y_text), "changed",
(GtkSignalFunc) off_y_update,
resize);
gtk_widget_show (private->off_y_text);
}
/* the constrain toggle button */
constrain = gtk_check_button_new_with_label (_("Constrain Ratio"));
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (constrain), private->constrain);
gtk_box_pack_start (GTK_BOX (vbox), constrain, FALSE, FALSE, 0);
gtk_signal_connect (GTK_OBJECT (constrain), "toggled",
(GtkSignalFunc) constrain_update,
resize);
gtk_widget_show (constrain);
if (type == ResizeWidget)
{
/* frame to hold drawing area */
hbox = gtk_hbox_new (FALSE, 1);
gtk_box_pack_start (GTK_BOX (vbox), hbox, TRUE, FALSE, 0);
frame = gtk_frame_new (NULL);
gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
gtk_container_set_border_width (GTK_CONTAINER (frame), 2);
gtk_box_pack_start (GTK_BOX (hbox), frame, TRUE, FALSE, 0);
private->drawing_area = gtk_drawing_area_new ();
gtk_drawing_area_size (GTK_DRAWING_AREA (private->drawing_area),
private->area_width, private->area_height);
gtk_widget_set_events (private->drawing_area, EVENT_MASK);
gtk_signal_connect (GTK_OBJECT (private->drawing_area), "event",
(GtkSignalFunc) resize_events,
NULL);
gtk_object_set_user_data (GTK_OBJECT (private->drawing_area), resize);
gtk_container_add (GTK_CONTAINER (frame), private->drawing_area);
gtk_widget_show (private->drawing_area);
gtk_widget_show (frame);
gtk_widget_show (hbox);
}
gtk_widget_show (table);
gtk_widget_show (vbox);
action_items[0].user_data = user_data;
action_items[0].callback = ok_cb;
action_items[1].user_data = user_data;
action_items[1].callback = cancel_cb;
build_action_area (GTK_DIALOG (resize->resize_shell), action_items, 2, 0);
return resize;
}
void
resize_widget_free (Resize *resize)
{
ResizePrivate *private = resize->private_part;
if (private->object)
gtk_signal_disconnect (GTK_OBJECT (private->object),
private->object_destroy_handler);
gtk_widget_destroy (resize->resize_shell);
g_free (resize->private_part);
g_free (resize);
}
static void
resize_draw (Resize *resize)
{
GtkWidget *widget;
ResizePrivate *private;
int aw, ah;
int x, y;
int w, h;
/* Only need to draw if it's a resize widget */
if (resize->type != ResizeWidget)
return;
private = (ResizePrivate *) resize->private_part;
widget = private->drawing_area;
/* If we're making the size larger */
if (private->old_width <= resize->width)
w = resize->width;
/* otherwise, if we're making the size smaller */
else
w = private->old_width * 2 - resize->width;
/* If we're making the size larger */
if (private->old_height <= resize->height)
h = resize->height;
/* otherwise, if we're making the size smaller */
else
h = private->old_height * 2 - resize->height;
if (w > h)
private->ratio = (double) DRAWING_AREA_SIZE / (double) w;
else
private->ratio = (double) DRAWING_AREA_SIZE / (double) h;
aw = (int) (private->ratio * w);
ah = (int) (private->ratio * h);
if (aw != private->area_width || ah != private->area_height)
{
private->area_width = aw;
private->area_height = ah;
gtk_widget_set_usize (private->drawing_area, aw, ah);
}
if (private->old_width <= resize->width)
x = private->ratio * resize->off_x;
else
x = private->ratio * (resize->off_x + private->old_width - resize->width);
if (private->old_height <= resize->height)
y = private->ratio * resize->off_y;
else
y = private->ratio * (resize->off_y + private->old_height - resize->height);
w = private->ratio * private->old_width;
h = private->ratio * private->old_height;
gdk_window_clear (private->drawing_area->window);
gtk_draw_shadow (widget->style, widget->window,
GTK_STATE_NORMAL, GTK_SHADOW_OUT,
x, y, w, h);
/* If we're making the size smaller */
if (private->old_width > resize->width ||
private->old_height > resize->height)
{
if (private->old_width > resize->width)
{
x = private->ratio * (private->old_width - resize->width);
w = private->ratio * resize->width;
}
else
{
x = -1;
w = aw + 2;
}
if (private->old_height > resize->height)
{
y = private->ratio * (private->old_height - resize->height);
h = private->ratio * resize->height;
}
else
{
y = -1;
h = ah + 2;
}
gdk_draw_rectangle (private->drawing_area->window,
widget->style->black_gc, 0,
x, y, w, h);
}
}
static int
resize_bound_off_x (Resize *resize,
int off_x)
{
ResizePrivate *private;
private = (ResizePrivate *) resize->private_part;
if (private->old_width <= resize->width)
off_x = BOUNDS (off_x, 0, (resize->width - private->old_width));
else
off_x = BOUNDS (off_x, (resize->width - private->old_width), 0);
return off_x;
}
static int
resize_bound_off_y (Resize *resize,
int off_y)
{
ResizePrivate *private;
private = (ResizePrivate *) resize->private_part;
if (private->old_height <= resize->height)
off_y = BOUNDS (off_y, 0, (resize->height - private->old_height));
else
off_y = BOUNDS (off_y, (resize->height - private->old_height), 0);
return off_y;
}
static void
constrain_update (GtkWidget *w,
gpointer data)
{
Resize *resize;
ResizePrivate *private;
resize = (Resize *) data;
private = (ResizePrivate *) resize->private_part;
if (GTK_TOGGLE_BUTTON (w)->active)
private->constrain = TRUE;
else
private->constrain = FALSE;
}
static void
off_x_update (GtkWidget *w,
gpointer data)
{
Resize *resize;
ResizePrivate *private;
char *str;
int offset;
resize = (Resize *) data;
private = (ResizePrivate *) resize->private_part;
str = gtk_entry_get_text (GTK_ENTRY (w));
offset = atoi (str);
offset = resize_bound_off_x (resize, offset);
if (offset != resize->off_x)
{
resize->off_x = offset;
resize_draw (resize);
}
}
static void
off_y_update (GtkWidget *w,
gpointer data)
{
Resize *resize;
ResizePrivate *private;
char *str;
int offset;
resize = (Resize *) data;
private = (ResizePrivate *) resize->private_part;
str = gtk_entry_get_text (GTK_ENTRY (w));
offset = atoi (str);
offset = resize_bound_off_y (resize, offset);
if (offset != resize->off_y)
{
resize->off_y = offset;
resize_draw (resize);
}
}
static void
width_update (GtkWidget *w,
gpointer data)
{
Resize *resize;
ResizePrivate *private;
char *str;
double ratio;
int new_height;
char size[12];
char ratio_text[12];
resize = (Resize *) data;
private = (ResizePrivate *) resize->private_part;
str = gtk_entry_get_text (GTK_ENTRY (w));
resize->width = atoi (str);
ratio = (double) resize->width / (double) private->old_width;
resize->ratio_x = ratio;
sprintf (ratio_text, "%0.4f", ratio);
gtk_signal_handler_block_by_data (GTK_OBJECT (private->ratio_x_text), data);
gtk_entry_set_text (GTK_ENTRY (private->ratio_x_text), ratio_text);
gtk_signal_handler_unblock_by_data (GTK_OBJECT (private->ratio_x_text), data);
if (resize->type == ResizeWidget)
{
resize->off_x = resize_bound_off_x (resize, (resize->width - private->old_width) / 2);
sprintf (size, "%d", resize->off_x);
gtk_signal_handler_block_by_data (GTK_OBJECT (private->off_x_text), data);
gtk_entry_set_text (GTK_ENTRY (private->off_x_text), size);
gtk_signal_handler_unblock_by_data (GTK_OBJECT (private->off_x_text), data);
}
if (private->constrain && resize->width != 0)
{
private->constrain = FALSE;
new_height = (int) (private->old_height * ratio);
if (new_height == 0) new_height = 1;
if (new_height != resize->height)
{
resize->height = new_height;
sprintf (size, "%d", resize->height);
gtk_signal_handler_block_by_data (GTK_OBJECT (private->height_text), data);
gtk_entry_set_text (GTK_ENTRY (private->height_text), size);
gtk_signal_handler_unblock_by_data (GTK_OBJECT (private->height_text), data);
resize->ratio_y = ratio;
gtk_signal_handler_block_by_data (GTK_OBJECT (private->ratio_y_text), data);
gtk_entry_set_text (GTK_ENTRY (private->ratio_y_text), ratio_text);
gtk_signal_handler_unblock_by_data (GTK_OBJECT (private->ratio_y_text), data);
if (resize->type == ResizeWidget)
{
resize->off_y = resize_bound_off_y (resize, (resize->height - private->old_height) / 2);
sprintf (size, "%d", resize->off_y);
gtk_signal_handler_block_by_data (GTK_OBJECT (private->off_y_text), data);
gtk_entry_set_text (GTK_ENTRY (private->off_y_text), size);
gtk_signal_handler_unblock_by_data (GTK_OBJECT (private->off_y_text), data);
}
}
private->constrain = TRUE;
}
resize_draw (resize);
}
static void
height_update (GtkWidget *w,
gpointer data)
{
Resize *resize;
ResizePrivate *private;
char *str;
double ratio;
int new_width;
char size[12];
char ratio_text[12];
resize = (Resize *) data;
private = (ResizePrivate *) resize->private_part;
str = gtk_entry_get_text (GTK_ENTRY (w));
resize->height = atoi (str);
ratio = (double) resize->height / (double) private->old_height;
resize->ratio_y = ratio;
sprintf (ratio_text, "%0.4f", ratio);
gtk_signal_handler_block_by_data (GTK_OBJECT (private->ratio_y_text), data);
gtk_entry_set_text (GTK_ENTRY (private->ratio_y_text), ratio_text);
gtk_signal_handler_unblock_by_data (GTK_OBJECT (private->ratio_y_text), data);
if (resize->type == ResizeWidget)
{
resize->off_y = resize_bound_off_y (resize, (resize->height - private->old_height) / 2);
sprintf (size, "%d", resize->off_y);
gtk_signal_handler_block_by_data (GTK_OBJECT (private->off_y_text), data);
gtk_entry_set_text (GTK_ENTRY (private->off_y_text), size);
gtk_signal_handler_unblock_by_data (GTK_OBJECT (private->off_y_text), data);
}
if (private->constrain && resize->height != 0)
{
private->constrain = FALSE;
ratio = (double) resize->height / (double) private->old_height;
new_width = (int) (private->old_width * ratio);
if (new_width == 0) new_width = 1;
if (new_width != resize->width)
{
resize->width = new_width;
sprintf (size, "%d", resize->width);
gtk_signal_handler_block_by_data (GTK_OBJECT (private->width_text), data);
gtk_entry_set_text (GTK_ENTRY (private->width_text), size);
gtk_signal_handler_unblock_by_data (GTK_OBJECT (private->width_text), data);
resize->ratio_x = ratio;
gtk_signal_handler_block_by_data (GTK_OBJECT (private->ratio_x_text), data);
gtk_entry_set_text (GTK_ENTRY (private->ratio_x_text), ratio_text);
gtk_signal_handler_unblock_by_data (GTK_OBJECT (private->ratio_x_text), data);
if (resize->type == ResizeWidget)
{
resize->off_x = resize_bound_off_x (resize, (resize->width - private->old_width) / 2);
sprintf (size, "%d", resize->off_x);
gtk_signal_handler_block_by_data (GTK_OBJECT (private->off_x_text), data);
gtk_entry_set_text (GTK_ENTRY (private->off_x_text), size);
gtk_signal_handler_unblock_by_data (GTK_OBJECT (private->off_x_text), data);
}
}
private->constrain = TRUE;
}
resize_draw (resize);
}
static void
ratio_x_update (GtkWidget *w,
gpointer data)
{
Resize *resize;
ResizePrivate *private;
char *str;
int new_width;
int new_height;
char size[12];
char ratio_text[12];
resize = (Resize *) data;
private = (ResizePrivate *) resize->private_part;
str = gtk_entry_get_text (GTK_ENTRY (w));
resize->ratio_x = atof (str);
new_width = (int) ((double) private->old_width * resize->ratio_x);
if (new_width != resize->width)
{
resize->width = new_width;
sprintf (size, "%d", new_width);
gtk_signal_handler_block_by_data (GTK_OBJECT (private->width_text), data);
gtk_entry_set_text (GTK_ENTRY (private->width_text), size);
gtk_signal_handler_unblock_by_data (GTK_OBJECT (private->width_text), data);
if (resize->type == ResizeWidget)
{
resize->off_x = resize_bound_off_x (resize, (resize->width - private->old_width) / 2);
sprintf (size, "%d", resize->off_x);
gtk_signal_handler_block_by_data (GTK_OBJECT (private->off_x_text), data);
gtk_entry_set_text (GTK_ENTRY (private->off_x_text), size);
gtk_signal_handler_unblock_by_data (GTK_OBJECT (private->off_x_text), data);
}
}
if (private->constrain && resize->width != 0)
{
private->constrain = FALSE;
resize->ratio_y = resize->ratio_x;
new_height = (int) (private->old_height * resize->ratio_y);
if (new_height == 0) new_height = 1;
if (new_height != resize->height)
{
resize->height = new_height;
sprintf (size, "%d", resize->height);
gtk_signal_handler_block_by_data (GTK_OBJECT (private->height_text), data);
gtk_entry_set_text (GTK_ENTRY (private->height_text), size);
gtk_signal_handler_unblock_by_data (GTK_OBJECT (private->height_text), data);
sprintf (ratio_text, "%0.4f", resize->ratio_y);
gtk_signal_handler_block_by_data (GTK_OBJECT (private->ratio_y_text), data);
gtk_entry_set_text (GTK_ENTRY (private->ratio_y_text), ratio_text);
gtk_signal_handler_unblock_by_data (GTK_OBJECT (private->ratio_y_text), data);
if (resize->type == ResizeWidget)
{
resize->off_y = resize_bound_off_y (resize, (resize->height - private->old_height) / 2);
sprintf (size, "%d", resize->off_y);
gtk_signal_handler_block_by_data (GTK_OBJECT (private->off_y_text), data);
gtk_entry_set_text (GTK_ENTRY (private->off_y_text), size);
gtk_signal_handler_unblock_by_data (GTK_OBJECT (private->off_y_text), data);
}
}
private->constrain = TRUE;
}
resize_draw (resize);
}
static void
ratio_y_update (GtkWidget *w,
gpointer data)
{
Resize *resize;
ResizePrivate *private;
char *str;
int new_width;
int new_height;
char size[12];
char ratio_text[12];
resize = (Resize *) data;
private = (ResizePrivate *) resize->private_part;
str = gtk_entry_get_text (GTK_ENTRY (w));
resize->ratio_y = atof (str);
new_height = (int) ((double) private->old_height * resize->ratio_y);
if (new_height != resize->height)
{
resize->height = new_height;
sprintf (size, "%d", new_height);
gtk_signal_handler_block_by_data (GTK_OBJECT (private->height_text), data);
gtk_entry_set_text (GTK_ENTRY (private->height_text), size);
gtk_signal_handler_unblock_by_data (GTK_OBJECT (private->height_text), data);
if (resize->type == ResizeWidget)
{
resize->off_y = resize_bound_off_y (resize, (resize->height - private->old_height) / 2);
sprintf (size, "%d", resize->off_y);
gtk_signal_handler_block_by_data (GTK_OBJECT (private->off_y_text), data);
gtk_entry_set_text (GTK_ENTRY (private->off_y_text), size);
gtk_signal_handler_unblock_by_data (GTK_OBJECT (private->off_y_text), data);
}
}
if (private->constrain && resize->height != 0)
{
private->constrain = FALSE;
resize->ratio_x = resize->ratio_y;
new_width = (int) (private->old_width * resize->ratio_x);
if (new_width == 0) new_width = 1;
if (new_width != resize->width)
{
resize->width = new_width;
sprintf (size, "%d", resize->width);
gtk_signal_handler_block_by_data (GTK_OBJECT (private->width_text), data);
gtk_entry_set_text (GTK_ENTRY (private->width_text), size);
gtk_signal_handler_unblock_by_data (GTK_OBJECT (private->width_text), data);
sprintf (ratio_text, "%0.4f", resize->ratio_x);
gtk_signal_handler_block_by_data (GTK_OBJECT (private->ratio_x_text), data);
gtk_entry_set_text (GTK_ENTRY (private->ratio_x_text), ratio_text);
gtk_signal_handler_unblock_by_data (GTK_OBJECT (private->ratio_x_text), data);
if (resize->type == ResizeWidget)
{
resize->off_x = resize_bound_off_x (resize, (resize->width - private->old_width) / 2);
sprintf (size, "%d", resize->off_x);
gtk_signal_handler_block_by_data (GTK_OBJECT (private->off_x_text), data);
gtk_entry_set_text (GTK_ENTRY (private->off_x_text), size);
gtk_signal_handler_unblock_by_data (GTK_OBJECT (private->off_x_text), data);
}
}
private->constrain = TRUE;
}
resize_draw (resize);
}
static gint
resize_events (GtkWidget *widget,
GdkEvent *event)
{
Resize *resize;
ResizePrivate *private;
int dx, dy;
int off_x, off_y;
char size[12];
resize = (Resize *) gtk_object_get_user_data (GTK_OBJECT (widget));
private = (ResizePrivate *) resize->private_part;
switch (event->type)
{
case GDK_EXPOSE:
resize_draw (resize);
break;
case GDK_BUTTON_PRESS:
gdk_pointer_grab (private->drawing_area->window, FALSE,
(GDK_BUTTON1_MOTION_MASK |
GDK_BUTTON_RELEASE_MASK),
NULL, NULL, event->button.time);
private->orig_x = resize->off_x;
private->orig_y = resize->off_y;
private->start_x = event->button.x;
private->start_y = event->button.y;
break;
case GDK_MOTION_NOTIFY:
/* X offset */
dx = event->motion.x - private->start_x;
off_x = private->orig_x + dx / private->ratio;
off_x = resize_bound_off_x (resize, off_x);
sprintf (size, "%d", off_x);
gtk_entry_set_text (GTK_ENTRY (private->off_x_text), size);
/* Y offset */
dy = event->motion.y - private->start_y;
off_y = private->orig_y + dy / private->ratio;
off_y = resize_bound_off_y (resize, off_y);
sprintf (size, "%d", off_y);
gtk_entry_set_text (GTK_ENTRY (private->off_y_text), size);
break;
case GDK_BUTTON_RELEASE:
gdk_pointer_ungrab (event->button.time);
break;
default:
break;
}
return FALSE;
}
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