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gimp/app/tools/transform_tool.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 <stdlib.h>
#include <math.h>
#include "appenv.h"
#include "gdisplay.h"
#include "tools.h"
#include "perspective_tool.h"
#include "rotate_tool.h"
#include "scale_tool.h"
#include "shear_tool.h"
#include "transform_core.h"
#include "transform_tool.h"
#include "config.h"
#include "libgimp/gimpintl.h"
typedef struct _TransformOptions TransformOptions;
struct _TransformOptions
{
int direction;
int smoothing;
int clip;
int grid_size;
int show_grid;
ToolType type;
};
/* local functions */
static void transform_change_type (int);
/* Static variables */
static TransformOptions *transform_options = NULL;
static void
transform_toggle_update (GtkWidget *w,
gpointer data)
{
int *toggle_val;
toggle_val = (int *) data;
if (GTK_TOGGLE_BUTTON (w)->active)
*toggle_val = TRUE;
else
*toggle_val = FALSE;
}
static void
transform_show_grid_update (GtkWidget *w,
gpointer data)
{
transform_toggle_update (w, data);
transform_core_grid_density_changed ();
}
static void
transform_type_callback (GtkWidget *w,
gpointer client_data)
{
transform_change_type ((long) client_data);
}
static void
transform_direction_callback (GtkWidget *w,
gpointer client_data)
{
long dir = (long) client_data;
if (dir == TRANSFORM_TRADITIONAL)
transform_options->direction = TRANSFORM_TRADITIONAL;
else
transform_options->direction = TRANSFORM_CORRECTIVE;
}
static void
transform_grid_density_callback (GtkWidget *w,
GtkSpinButton *spin)
{
transform_options->grid_size =
(int) pow (2.0, 7.0 - gtk_spin_button_get_value_as_int (spin));
transform_core_grid_density_changed ();
}
static TransformOptions *
create_transform_options (void)
{
TransformOptions *options;
GtkWidget *main_box, *box, *vbox, *hbox;
GtkWidget *label;
GtkWidget *radio_frame;
GtkWidget *radio_box;
GtkWidget *radio_button;
GtkWidget *toggle;
GtkAdjustment *grid_adj;
GtkWidget *grid_density;
GSList *group;
int i;
static const char *transform_button_names[] =
{
N_("Rotation"),
N_("Scaling"),
N_("Shearing"),
N_("Perspective")
};
static const char *direction_button_names[] =
{
N_("Traditional"),
N_("Corrective")
};
/* the new options structure */
options = (TransformOptions *) g_malloc (sizeof (TransformOptions));
options->type = ROTATE;
options->smoothing = TRUE;
options->clip = FALSE;
options->direction = TRANSFORM_TRADITIONAL;
options->grid_size = 32;
options->show_grid = TRUE;
/* the main vbox */
main_box = gtk_vbox_new (FALSE, 1);
/* the main label */
label = gtk_label_new (_("Transform Tool Options"));
gtk_box_pack_start (GTK_BOX (main_box), label, FALSE, FALSE, 0);
gtk_widget_show (label);
/* the hbox holding the left and right vboxes*/
box = gtk_hbox_new (0, 2);
gtk_box_pack_start (GTK_BOX (main_box), box, FALSE, FALSE, 0);
/* the left vbox */
vbox = gtk_vbox_new (FALSE, 2);
gtk_box_pack_start (GTK_BOX (box), vbox, FALSE, FALSE, 0);
/* the first radio frame and box, for transform type */
radio_frame = gtk_frame_new (_("Transform"));
gtk_box_pack_start (GTK_BOX (vbox), radio_frame, FALSE, FALSE, 0);
radio_box = gtk_vbox_new (FALSE, 1);
gtk_container_add (GTK_CONTAINER (radio_frame), radio_box);
/* the radio buttons */
group = NULL;
for (i = 0; i < 4; i++)
{
radio_button =
gtk_radio_button_new_with_label (group, gettext(transform_button_names[i]));
group = gtk_radio_button_group (GTK_RADIO_BUTTON (radio_button));
gtk_box_pack_start (GTK_BOX (radio_box), radio_button, FALSE, FALSE, 0);
gtk_signal_connect (GTK_OBJECT (radio_button), "toggled",
(GtkSignalFunc) transform_type_callback,
(gpointer) ((long) ROTATE + i));
gtk_widget_show (radio_button);
}
gtk_widget_show (radio_box);
gtk_widget_show (radio_frame);
/* the smoothing toggle button */
toggle = gtk_check_button_new_with_label (_("Smoothing"));
gtk_box_pack_start (GTK_BOX (vbox), toggle, FALSE, FALSE, 0);
gtk_signal_connect (GTK_OBJECT (toggle), "toggled",
(GtkSignalFunc) transform_toggle_update,
&options->smoothing);
gtk_toggle_button_set_state (GTK_TOGGLE_BUTTON (toggle),
options->smoothing);
gtk_widget_show (toggle);
gtk_widget_show (vbox);
/* the right vbox */
vbox = gtk_vbox_new (FALSE, 2);
gtk_box_pack_start (GTK_BOX (box), vbox, FALSE, FALSE, 0);
/* the second radio frame and box, for transform direction */
radio_frame = gtk_frame_new (_("Tool paradigm"));
gtk_box_pack_start (GTK_BOX (vbox), radio_frame, FALSE, FALSE, 0);
radio_box = gtk_vbox_new (FALSE, 1);
gtk_container_add (GTK_CONTAINER (radio_frame), radio_box);
/* the radio buttons */
group = NULL;
for (i = 0; i < 2; i++)
{
radio_button =
gtk_radio_button_new_with_label (group, gettext(direction_button_names[i]));
group = gtk_radio_button_group (GTK_RADIO_BUTTON (radio_button));
gtk_box_pack_start (GTK_BOX (radio_box), radio_button, FALSE, FALSE, 0);
gtk_signal_connect (GTK_OBJECT (radio_button), "toggled",
(GtkSignalFunc) transform_direction_callback,
(gpointer) ((long) i));
gtk_widget_show (radio_button);
}
gtk_widget_show (radio_box);
gtk_widget_show (radio_frame);
/* the show grid toggle button */
toggle = gtk_check_button_new_with_label (_("Show grid"));
gtk_box_pack_start (GTK_BOX (vbox), toggle, FALSE, FALSE, 0);
gtk_toggle_button_set_state (GTK_TOGGLE_BUTTON (toggle),
options->show_grid);
/* important: connect the signal after setting the state, because calling
transform_show_grid_update before the tool is created will fail */
gtk_signal_connect (GTK_OBJECT (toggle), "toggled",
(GtkSignalFunc) transform_show_grid_update,
&options->show_grid);
gtk_widget_show (toggle);
/* the grid density entry */
hbox = gtk_hbox_new (FALSE, 1);
gtk_widget_show (hbox);
gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
label = gtk_label_new (_("Grid density: "));
gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
grid_adj = (GtkAdjustment *) gtk_adjustment_new (2.0, 0.0, 5.0, 1.0, 1.0, 0.0);
grid_density = gtk_spin_button_new (grid_adj, 0, 0);
gtk_spin_button_set_wrap (GTK_SPIN_BUTTON (grid_density), TRUE);
gtk_signal_connect (GTK_OBJECT (grid_adj), "value_changed",
(GtkSignalFunc) transform_grid_density_callback,
grid_density);
gtk_box_pack_start (GTK_BOX (hbox), grid_density, FALSE, FALSE, 0);
gtk_widget_show (grid_density);
/* the clip resulting image toggle button */
toggle = gtk_check_button_new_with_label (_("Clip result"));
gtk_box_pack_start (GTK_BOX (vbox), toggle, FALSE, FALSE, 0);
gtk_signal_connect (GTK_OBJECT (toggle), "toggled",
(GtkSignalFunc) transform_toggle_update,
&options->clip);
gtk_toggle_button_set_state (GTK_TOGGLE_BUTTON (toggle),
options->clip);
gtk_widget_show (toggle);
gtk_widget_show (vbox);
gtk_widget_show (box);
/* Register this selection options widget with the main tools options dialog */
tools_register_options (ROTATE, main_box);
tools_register_options (SCALE, main_box);
tools_register_options (SHEAR, main_box);
tools_register_options (PERSPECTIVE, main_box);
return options;
}
Tool *
tools_new_transform_tool ()
{
if (! transform_options)
transform_options = create_transform_options ();
switch (transform_options->type)
{
case ROTATE:
return tools_new_rotate_tool ();
break;
case SCALE:
return tools_new_scale_tool ();
break;
case SHEAR:
return tools_new_shear_tool ();
break;
case PERSPECTIVE:
return tools_new_perspective_tool ();
break;
default :
return NULL;
break;
}
}
void
tools_free_transform_tool (Tool *tool)
{
switch (transform_options->type)
{
case ROTATE:
tools_free_rotate_tool (tool);
break;
case SCALE:
tools_free_scale_tool (tool);
break;
case SHEAR:
tools_free_shear_tool (tool);
break;
case PERSPECTIVE:
tools_free_perspective_tool (tool);
break;
default:
break;
}
}
static void
transform_change_type (int new_type)
{
if (transform_options->type != new_type)
{
/* change the type, free the old tool, create the new tool */
transform_options->type = new_type;
tools_select (transform_options->type);
}
}
int
transform_tool_smoothing ()
{
if (!transform_options)
return TRUE;
else
return transform_options->smoothing;
}
int
transform_tool_clip ()
{
if (!transform_options)
return FALSE;
else
return transform_options->clip;
}
int
transform_tool_direction ()
{
if (!transform_options)
return TRANSFORM_TRADITIONAL;
else
return transform_options->direction;
}
int
transform_tool_grid_size ()
{
if (!transform_options)
return 32;
else
return transform_options->grid_size;
}
int
transform_tool_show_grid ()
{
if (!transform_options)
return TRUE;
else
return transform_options->show_grid;
}
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