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gimp/app/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 "config.h"
#include "appenv.h"
#include "gdisplay.h"
#include "gimpui.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 "libgimp/gimpmath.h"
#include "libgimp/gimpintl.h"
/* the transform structures */
typedef struct _TransformOptions TransformOptions;
struct _TransformOptions
{
ToolOptions tool_options;
ToolType type;
ToolType type_d;
GtkWidget *type_w[4]; /* 4 radio buttons */
gboolean smoothing;
gboolean smoothing_d;
GtkWidget *smoothing_w;
gint direction;
gint direction_d;
GtkWidget *direction_w[2]; /* 2 radio buttons */
gboolean show_grid;
gboolean show_grid_d;
GtkWidget *show_grid_w;
gint grid_size;
gint grid_size_d;
GtkObject *grid_size_w;
gboolean clip;
gboolean clip_d;
GtkWidget *clip_w;
gboolean showpath;
gboolean showpath_d;
GtkWidget *showpath_w;
};
/* the transform tool options */
static TransformOptions *transform_options = NULL;
/* local functions */
static void transform_change_type (ToolType new_type);
/* functions */
static void
transform_show_grid_update (GtkWidget *widget,
gpointer data)
{
static gboolean first_call = TRUE; /* eek, this hack avoids a segfault */
if (first_call)
{
first_call = FALSE;
return;
}
gimp_toggle_button_update (widget, data);
transform_core_grid_density_changed ();
}
static void
transform_show_path_update (GtkWidget *widget,
gpointer data)
{
static gboolean first_call = TRUE; /* eek, this hack avoids a segfault */
if (first_call)
{
first_call = FALSE;
return;
}
transform_core_showpath_changed (1); /* pause */
gimp_toggle_button_update (widget, data);
transform_core_showpath_changed (0); /* resume */
}
static void
transform_type_callback (GtkWidget *widget,
gpointer data)
{
transform_change_type ((long) data);
}
static void
transform_direction_callback (GtkWidget *widget,
gpointer data)
{
long dir = (long) data;
if (dir == TRANSFORM_TRADITIONAL)
transform_options->direction = TRANSFORM_TRADITIONAL;
else
transform_options->direction = TRANSFORM_CORRECTIVE;
}
static void
transform_grid_density_callback (GtkWidget *widget,
gpointer data)
{
transform_options->grid_size =
(int) (pow (2.0, 7.0 - GTK_ADJUSTMENT (widget)->value) + 0.5);
transform_core_grid_density_changed ();
}
static void
transform_options_reset (void)
{
TransformOptions *options = transform_options;
gtk_toggle_button_set_active (((options->type_d == ROTATE) ?
GTK_TOGGLE_BUTTON (options->type_w[0]) :
((options->type_d == SCALE) ?
GTK_TOGGLE_BUTTON (options->type_w[1]) :
((options->type_d == SHEAR) ?
GTK_TOGGLE_BUTTON (options->type_w[2]) :
GTK_TOGGLE_BUTTON (options->type_w[3])))),
TRUE);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (options->smoothing_w),
options->smoothing_d);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (options->showpath_w),
options->showpath_d);
gtk_toggle_button_set_active (((options->direction_d == TRANSFORM_TRADITIONAL) ?
GTK_TOGGLE_BUTTON (options->direction_w[0]) :
GTK_TOGGLE_BUTTON (options->direction_w[1])),
TRUE);
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (options->show_grid_w),
options->show_grid_d);
gtk_adjustment_set_value (GTK_ADJUSTMENT (options->grid_size_w),
7.0 - log (options->grid_size_d) / log (2.0));
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (options->clip_w),
options->clip_d);
}
static TransformOptions *
transform_options_new (void)
{
TransformOptions *options;
GtkWidget *table;
GtkWidget *vbox;
GtkWidget *hbox;
GtkWidget *label;
GtkWidget *frame;
GtkWidget *fbox;
GtkWidget *grid_density;
/* the new transform tool options structure */
options = g_new (TransformOptions, 1);
tool_options_init ((ToolOptions *) options,
_("Transform Tool"),
transform_options_reset);
options->type = options->type_d = ROTATE;
options->smoothing = options->smoothing_d = TRUE;
options->showpath = options->showpath_d = TRUE;
options->clip = options->clip_d = FALSE;
options->direction = options->direction_d = TRANSFORM_TRADITIONAL;
options->grid_size = options->grid_size_d = 32;
options->show_grid = options->show_grid_d = TRUE;
/* the main table */
table = gtk_table_new (2, 2, FALSE);
gtk_table_set_col_spacing (GTK_TABLE (table), 0, 2);
gtk_box_pack_start (GTK_BOX (options->tool_options.main_vbox), table,
FALSE, FALSE, 0);
/* the left vbox */
vbox = gtk_vbox_new (FALSE, 2);
gtk_table_attach_defaults (GTK_TABLE (table), vbox, 0, 1, 0, 1);
/* the transform type radio buttons */
frame = gimp_radio_group_new (TRUE, _("Transform"),
_("Rotation"), transform_type_callback,
ROTATE, NULL, &options->type_w[0], TRUE,
_("Scaling"), transform_type_callback,
SCALE, NULL, &options->type_w[1], FALSE,
_("Shearing"), transform_type_callback,
SHEAR, NULL, &options->type_w[2], FALSE,
_("Perspective"), transform_type_callback,
PERSPECTIVE, NULL, &options->type_w[3], FALSE,
NULL);
gtk_box_pack_start (GTK_BOX (vbox), frame, TRUE, TRUE, 0);
gtk_widget_show (frame);
gtk_widget_show (vbox);
/* the right vbox */
vbox = gtk_vbox_new (FALSE, 2);
gtk_table_attach_defaults (GTK_TABLE (table), vbox, 1, 2, 0, 1);
/* the second radio frame and box, for transform direction */
frame = gimp_radio_group_new (TRUE, _("Tool Paradigm"),
_("Traditional"), transform_direction_callback,
TRANSFORM_TRADITIONAL, NULL,
&options->direction_w[0], TRUE,
_("Corrective"), transform_direction_callback,
TRANSFORM_CORRECTIVE, NULL,
&options->direction_w[1], FALSE,
NULL);
gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
gtk_widget_show (frame);
/* the grid frame */
frame = gtk_frame_new (NULL);
gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
fbox = gtk_vbox_new (FALSE, 1);
gtk_container_set_border_width (GTK_CONTAINER (fbox), 2);
gtk_container_add (GTK_CONTAINER (frame), fbox);
/* the show grid toggle button */
options->show_grid_w = gtk_check_button_new_with_label (_("Show Grid"));
gtk_signal_connect (GTK_OBJECT (options->show_grid_w), "toggled",
GTK_SIGNAL_FUNC (transform_show_grid_update),
&options->show_grid);
gtk_box_pack_start (GTK_BOX (fbox), options->show_grid_w, FALSE, FALSE, 0);
gtk_widget_show (options->show_grid_w);
/* the grid density entry */
hbox = gtk_hbox_new (FALSE, 6);
gtk_widget_show (hbox);
gtk_box_pack_start (GTK_BOX (fbox), hbox, FALSE, FALSE, 0);
label = gtk_label_new (_("Density:"));
gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
options->grid_size_w =
gtk_adjustment_new (7.0 - log (options->grid_size_d) / log (2.0), 0.0, 5.0,
1.0, 1.0, 0.0);
grid_density =
gtk_spin_button_new (GTK_ADJUSTMENT (options->grid_size_w), 0, 0);
gtk_spin_button_set_wrap (GTK_SPIN_BUTTON (grid_density), TRUE);
gtk_signal_connect (GTK_OBJECT (options->grid_size_w), "value_changed",
GTK_SIGNAL_FUNC (transform_grid_density_callback),
&options->grid_size);
gtk_box_pack_start (GTK_BOX (hbox), grid_density, FALSE, FALSE, 0);
gtk_widget_show (grid_density);
gtk_widget_set_sensitive (label, options->show_grid_d);
gtk_widget_set_sensitive (grid_density, options->show_grid_d);
gtk_object_set_data (GTK_OBJECT (options->show_grid_w), "set_sensitive",
grid_density);
gtk_object_set_data (GTK_OBJECT (grid_density), "set_sensitive", label);
gtk_widget_show (fbox);
gtk_widget_show (frame);
gtk_widget_show (vbox);
/* the smoothing toggle button */
options->smoothing_w = gtk_check_button_new_with_label (_("Smoothing"));
gtk_signal_connect (GTK_OBJECT (options->smoothing_w), "toggled",
GTK_SIGNAL_FUNC (gimp_toggle_button_update),
&options->smoothing);
gtk_table_attach_defaults (GTK_TABLE (table),
options->smoothing_w, 0, 1, 1, 2);
gtk_widget_show (options->smoothing_w);
/* the showpath toggle button */
options->showpath_w = gtk_check_button_new_with_label (_("Show Path"));
gtk_signal_connect (GTK_OBJECT (options->showpath_w), "toggled",
GTK_SIGNAL_FUNC (transform_show_path_update),
&options->showpath);
gtk_table_attach_defaults (GTK_TABLE (table),
options->showpath_w, 1, 2, 1, 2);
gtk_widget_show (options->showpath_w);
gtk_widget_show (table);
/* the clip resulting image toggle button */
options->clip_w = gtk_check_button_new_with_label (_("Clip Result"));
gtk_signal_connect (GTK_OBJECT (options->clip_w), "toggled",
GTK_SIGNAL_FUNC (gimp_toggle_button_update),
&options->clip);
gtk_box_pack_start (GTK_BOX (options->tool_options.main_vbox),
options->clip_w, FALSE, FALSE, 0);
gtk_widget_show (options->clip_w);
return options;
}
Tool *
tools_new_transform_tool (void)
{
/* The tool options */
if (! transform_options)
{
transform_options = transform_options_new ();
tools_register (ROTATE, (ToolOptions *) transform_options);
tools_register (SCALE, (ToolOptions *) transform_options);
tools_register (SHEAR, (ToolOptions *) transform_options);
tools_register (PERSPECTIVE, (ToolOptions *) transform_options);
/* press all default buttons */
transform_options_reset ();
}
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 (ToolType new_type)
{
if (transform_options->type != new_type)
{
/* change the type, free the old tool, create the new tool */
transform_options->type = new_type;
if (gimp_context_get_tool (gimp_context_get_user ()) != new_type)
gimp_context_set_tool (gimp_context_get_user (), new_type);
else
gimp_context_tool_changed (gimp_context_get_user ());
}
}
gboolean
transform_tool_smoothing (void)
{
if (!transform_options)
return TRUE;
else
return transform_options->smoothing;
}
gboolean
transform_tool_showpath (void)
{
if (!transform_options)
return TRUE;
else
return transform_options->showpath;
}
gboolean
transform_tool_clip (void)
{
if (!transform_options)
return FALSE;
else
return transform_options->clip;
}
gint
transform_tool_direction (void)
{
if (!transform_options)
return TRANSFORM_TRADITIONAL;
else
return transform_options->direction;
}
gint
transform_tool_grid_size (void)
{
if (!transform_options)
return 32;
else
return transform_options->grid_size;
}
gboolean
transform_tool_show_grid (void)
{
if (!transform_options)
return TRUE;
else
return transform_options->show_grid;
}
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