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gimp/app/tools/gimprotatetool.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 <gtk/gtk.h>
#include "libgimpmath/gimpmath.h"
#include "libgimpwidgets/gimpwidgets.h"
#include "tools-types.h"
#include "paint-funcs/paint-funcs.h"
#include "core/gimpimage.h"
#include "gui/info-dialog.h"
#include "gdisplay.h"
#include "gdisplay_ops.h"
#include "gimpprogress.h"
#include "undo.h"
#include "path_transform.h"
#include "gimprotatetool.h"
#include "tool_manager.h"
#include "tool_options.h"
#include "transform_options.h"
#include "libgimp/gimpintl.h"
#define WANT_ROTATE_BITS
#include "icons.h"
/* index into trans_info array */
#define ANGLE 0
#define REAL_ANGLE 1
#define CENTER_X 2
#define CENTER_Y 3
#define EPSILON 0.018 /* ~ 1 degree */
#define FIFTEEN_DEG (G_PI / 12.0)
/* local function declarations */
static void gimp_rotate_tool_class_init (GimpRotateToolClass *klass);
static void gimp_rotate_tool_init (GimpRotateTool *rotate_tool);
static void gimp_rotate_tool_destroy (GtkObject *object);
static TileManager * gimp_rotate_tool_transform (GimpTransformTool *transform_tool,
GDisplay *gdisp,
TransformState state);
static void rotate_tool_recalc (GimpTool *tool,
GDisplay *gdisp);
static void rotate_tool_motion (GimpTool *tool,
GDisplay *gdisp);
static void rotate_info_update (GimpTool *tool);
static void rotate_angle_changed (GtkWidget *entry,
gpointer data);
static void rotate_center_changed (GtkWidget *entry,
gpointer data);
/* variables local to this file */
static gdouble angle_val;
static gdouble center_vals[2];
/* needed for size update */
static GtkWidget *sizeentry = NULL;
static GimpTransformToolClass *parent_class = NULL;
static TransformOptions *rotate_options = NULL;
/* public functions */
void
gimp_rotate_tool_register (Gimp *gimp)
{
tool_manager_register_tool (gimp,
GIMP_TYPE_ROTATE_TOOL,
FALSE,
"gimp:rotate_tool",
_("Rotate Tool"),
_("Rotate the layer or selection"),
N_("/Tools/Transform Tools/Rotate"), "<shift>R",
NULL, "tools/rotate.html",
(const gchar **) rotate_bits);
}
GtkType
gimp_rotate_tool_get_type (void)
{
static GtkType tool_type = 0;
if (! tool_type)
{
GtkTypeInfo tool_info =
{
"GimpRotateTool",
sizeof (GimpRotateTool),
sizeof (GimpRotateToolClass),
(GtkClassInitFunc) gimp_rotate_tool_class_init,
(GtkObjectInitFunc) gimp_rotate_tool_init,
/* reserved_1 */ NULL,
/* reserved_2 */ NULL,
(GtkClassInitFunc) NULL,
};
tool_type = gtk_type_unique (GIMP_TYPE_TRANSFORM_TOOL, &tool_info);
}
return tool_type;
}
TileManager *
gimp_rotate_tool_rotate (GimpImage *gimage,
GimpDrawable *drawable,
GDisplay *gdisp,
gdouble angle,
TileManager *float_tiles,
gboolean interpolation,
GimpMatrix3 matrix)
{
GimpProgress *progress;
TileManager *ret;
progress = progress_start (gdisp, _("Rotating..."), FALSE, NULL, NULL);
ret = gimp_transform_tool_do (gimage, drawable, float_tiles,
interpolation, matrix,
progress ? progress_update_and_flush :
(GimpProgressFunc) NULL,
progress);
if (progress)
progress_end (progress);
return ret;
}
/* private function definitions */
static void
gimp_rotate_tool_class_init (GimpRotateToolClass *klass)
{
GtkObjectClass *object_class;
GimpTransformToolClass *trans_class;
object_class = (GtkObjectClass *) klass;
trans_class = (GimpTransformToolClass *) klass;
parent_class = gtk_type_class (GIMP_TYPE_TRANSFORM_TOOL);
object_class->destroy = gimp_rotate_tool_destroy;
trans_class->transform = gimp_rotate_tool_transform;
}
static void
gimp_rotate_tool_init (GimpRotateTool *rotate_tool)
{
GimpTool *tool;
GimpTransformTool *tr_tool;
tool = GIMP_TOOL (rotate_tool);
tr_tool = GIMP_TRANSFORM_TOOL (rotate_tool);
if (! rotate_options)
{
rotate_options = transform_options_new (GIMP_TYPE_ROTATE_TOOL,
transform_options_reset);
tool_manager_register_tool_options (GIMP_TYPE_ROTATE_TOOL,
(GimpToolOptions *) rotate_options);
}
tool->tool_cursor = GIMP_ROTATE_TOOL_CURSOR;
tr_tool->trans_info[ANGLE] = 0.0;
tr_tool->trans_info[REAL_ANGLE] = 0.0;
tr_tool->trans_info[CENTER_X] = 0.0;
tr_tool->trans_info[CENTER_Y] = 0.0;
/* assemble the transformation matrix */
gimp_matrix3_identity (tr_tool->transform);
}
static void
gimp_rotate_tool_destroy (GtkObject *object)
{
if (GTK_OBJECT_CLASS (parent_class)->destroy)
GTK_OBJECT_CLASS (parent_class)->destroy (object);
}
static TileManager *
gimp_rotate_tool_transform (GimpTransformTool *transform_tool,
GDisplay *gdisp,
TransformState state)
{
GimpTool *tool;
GtkWidget *widget;
GtkWidget *spinbutton2;
tool = GIMP_TOOL (transform_tool);
switch (state)
{
case TRANSFORM_INIT:
angle_val = 0.0;
center_vals[0] = transform_tool->cx;
center_vals[1] = transform_tool->cy;
if (!transform_info)
{
transform_info = info_dialog_new (_("Rotation Information"),
gimp_standard_help_func,
"tools/transform_rotate.html");
widget =
info_dialog_add_spinbutton (transform_info, _("Angle:"),
&angle_val,
-180, 180, 1, 15, 1, 1, 2,
G_CALLBACK (rotate_angle_changed),
tool);
gtk_spin_button_set_wrap (GTK_SPIN_BUTTON (widget), TRUE);
/* this looks strange (-180, 181), but it works */
widget = info_dialog_add_scale (transform_info, "", &angle_val,
-180, 181, 0.01, 0.1, 1, -1,
G_CALLBACK (rotate_angle_changed),
tool);
gtk_widget_set_usize (widget, 180, 0);
spinbutton2 =
info_dialog_add_spinbutton (transform_info, _("Center X:"), NULL,
-1, 1, 1, 10, 1, 1, 2, NULL, NULL);
sizeentry =
info_dialog_add_sizeentry (transform_info, _("Y:"),
center_vals, 1,
gdisp->gimage->unit, "%a",
TRUE, TRUE, FALSE,
GIMP_SIZE_ENTRY_UPDATE_SIZE,
G_CALLBACK (rotate_center_changed),
tool);
gimp_size_entry_add_field (GIMP_SIZE_ENTRY (sizeentry),
GTK_SPIN_BUTTON (spinbutton2), NULL);
gtk_table_set_row_spacing (GTK_TABLE (transform_info->info_table),
1, 6);
gtk_table_set_row_spacing (GTK_TABLE (transform_info->info_table),
2, 0);
}
g_signal_handlers_block_by_func (G_OBJECT (sizeentry),
rotate_center_changed,
tool);
gimp_size_entry_set_unit (GIMP_SIZE_ENTRY (sizeentry),
gdisp->gimage->unit);
if (gdisp->dot_for_dot)
gimp_size_entry_set_unit (GIMP_SIZE_ENTRY (sizeentry), GIMP_UNIT_PIXEL);
gimp_size_entry_set_resolution (GIMP_SIZE_ENTRY (sizeentry), 0,
gdisp->gimage->xresolution, FALSE);
gimp_size_entry_set_resolution (GIMP_SIZE_ENTRY (sizeentry), 1,
gdisp->gimage->yresolution, FALSE);
gimp_size_entry_set_refval_boundaries (GIMP_SIZE_ENTRY (sizeentry), 0,
-65536,
65536 + gdisp->gimage->width);
gimp_size_entry_set_refval_boundaries (GIMP_SIZE_ENTRY (sizeentry), 1,
-65536,
65536 + gdisp->gimage->height);
gimp_size_entry_set_size (GIMP_SIZE_ENTRY (sizeentry), 0,
transform_tool->x1, transform_tool->x2);
gimp_size_entry_set_size (GIMP_SIZE_ENTRY (sizeentry), 1,
transform_tool->y1, transform_tool->y2);
gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (sizeentry), 0,
center_vals[0]);
gimp_size_entry_set_refval (GIMP_SIZE_ENTRY (sizeentry), 1,
center_vals[1]);
gtk_widget_set_sensitive (transform_info->shell, TRUE);
g_signal_handlers_unblock_by_func (G_OBJECT (sizeentry),
rotate_center_changed,
tool);
transform_tool->trans_info[ANGLE] = angle_val;
transform_tool->trans_info[REAL_ANGLE] = angle_val;
transform_tool->trans_info[CENTER_X] = center_vals[0];
transform_tool->trans_info[CENTER_Y] = center_vals[1];
return NULL;
break;
case TRANSFORM_MOTION:
rotate_tool_motion (tool, gdisp);
rotate_tool_recalc (tool, gdisp);
break;
case TRANSFORM_RECALC:
rotate_tool_recalc (tool, gdisp);
break;
case TRANSFORM_FINISH:
gtk_widget_set_sensitive (GTK_WIDGET (transform_info->shell), FALSE);
return gimp_rotate_tool_rotate (gdisp->gimage,
gimp_image_active_drawable (gdisp->gimage),
gdisp,
transform_tool->trans_info[ANGLE],
transform_tool->original,
gimp_transform_tool_smoothing (),
transform_tool->transform);
break;
}
return NULL;
}
static void
rotate_info_update (GimpTool *tool)
{
GimpTransformTool *transform_tool;
transform_tool = GIMP_TRANSFORM_TOOL (tool);
angle_val = gimp_rad_to_deg (transform_tool->trans_info[ANGLE]);
center_vals[0] = transform_tool->cx;
center_vals[1] = transform_tool->cy;
info_dialog_update (transform_info);
info_dialog_popup (transform_info);
}
static void
rotate_angle_changed (GtkWidget *widget,
gpointer data)
{
GimpTool *tool;
GimpDrawTool *draw_tool;
GimpTransformTool *transform_tool;
gdouble value;
tool = (GimpTool *) data;
if (tool)
{
transform_tool = GIMP_TRANSFORM_TOOL (tool);
draw_tool = GIMP_DRAW_TOOL (tool);
value = gimp_deg_to_rad (GTK_ADJUSTMENT (widget)->value);
if (value != transform_tool->trans_info[ANGLE])
{
gimp_draw_tool_pause (draw_tool);
transform_tool->trans_info[ANGLE] = value;
rotate_tool_recalc (tool, tool->gdisp);
gimp_draw_tool_resume (draw_tool);
}
}
}
static void
rotate_center_changed (GtkWidget *widget,
gpointer data)
{
GimpTool *tool;
GimpDrawTool *draw_tool;
GimpTransformTool *transform_tool;
gint cx;
gint cy;
tool = (GimpTool *) data;
if (tool)
{
transform_tool = GIMP_TRANSFORM_TOOL (tool);
draw_tool = GIMP_DRAW_TOOL (tool);
cx = RINT (gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (widget), 0));
cy = RINT (gimp_size_entry_get_refval (GIMP_SIZE_ENTRY (widget), 1));
if ((cx != transform_tool->cx) ||
(cy != transform_tool->cy))
{
gimp_draw_tool_pause (draw_tool);
transform_tool->cx = cx;
transform_tool->cy = cy;
rotate_tool_recalc (tool, tool->gdisp);
gimp_draw_tool_resume (draw_tool);
}
}
}
static void
rotate_tool_motion (GimpTool *tool,
GDisplay *gdisp)
{
GimpTransformTool *transform_tool;
gdouble angle1, angle2, angle;
gdouble cx, cy;
gdouble x1, y1, x2, y2;
transform_tool = GIMP_TRANSFORM_TOOL (tool);
if (transform_tool->function == TRANSFORM_HANDLE_CENTER)
{
transform_tool->cx = transform_tool->curx;
transform_tool->cy = transform_tool->cury;
return;
}
cx = transform_tool->cx;
cy = transform_tool->cy;
x1 = transform_tool->curx - cx;
x2 = transform_tool->lastx - cx;
y1 = cy - transform_tool->cury;
y2 = cy - transform_tool->lasty;
/* find the first angle */
angle1 = atan2 (y1, x1);
/* find the angle */
angle2 = atan2 (y2, x2);
angle = angle2 - angle1;
if (angle > G_PI || angle < -G_PI)
angle = angle2 - ((angle1 < 0) ? 2.0 * G_PI + angle1 : angle1 - 2.0 * G_PI);
/* increment the transform tool's angle */
transform_tool->trans_info[REAL_ANGLE] += angle;
/* limit the angle to between 0 and 360 degrees */
if (transform_tool->trans_info[REAL_ANGLE] < - G_PI)
transform_tool->trans_info[REAL_ANGLE] =
2.0 * G_PI - transform_tool->trans_info[REAL_ANGLE];
else if (transform_tool->trans_info[REAL_ANGLE] > G_PI)
transform_tool->trans_info[REAL_ANGLE] =
transform_tool->trans_info[REAL_ANGLE] - 2.0 * G_PI;
/* constrain the angle to 15-degree multiples if ctrl is held down */
if (transform_tool->state & GDK_CONTROL_MASK)
transform_tool->trans_info[ANGLE] =
FIFTEEN_DEG * (int) ((transform_tool->trans_info[REAL_ANGLE] +
FIFTEEN_DEG / 2.0) /
FIFTEEN_DEG);
else
transform_tool->trans_info[ANGLE] = transform_tool->trans_info[REAL_ANGLE];
}
static void
rotate_tool_recalc (GimpTool *tool,
GDisplay *gdisp)
{
GimpTransformTool *transform_tool;
gdouble cx, cy;
transform_tool = GIMP_TRANSFORM_TOOL (tool);
cx = transform_tool->cx;
cy = transform_tool->cy;
/* assemble the transformation matrix */
gimp_matrix3_identity (transform_tool->transform);
gimp_matrix3_translate (transform_tool->transform, -cx, -cy);
gimp_matrix3_rotate (transform_tool->transform,
transform_tool->trans_info[ANGLE]);
gimp_matrix3_translate (transform_tool->transform, +cx, +cy);
/* transform the bounding box */
gimp_transform_tool_transform_bounding_box (transform_tool);
/* update the information dialog */
rotate_info_update (tool);
}
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