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gimp/app/tools/gimprotatetool.c
David Neary 24c39e398a Enabled the rest of the transform tools and changed some of the options 
Enabled the rest of the transform tools and changed some of
the options stuff in transform_options_new(). There are one or two
outstanding (non-critical) runtime problems in that function.
2001-04-24 18:43:31 +00:00

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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 "apptypes.h"
#include "paint-funcs/paint-funcs.h"
#include "gui/info-dialog.h"
#include "cursorutil.h"
#include "floating_sel.h"
#include "gdisplay.h"
#include "gdisplay_ops.h"
#include "gimage_mask.h"
#include "gimplayer.h"
#include "gimpimage.h"
#include "gimpprogress.h"
#include "selection.h"
#include "undo.h"
#include "path_transform.h"
#include "pixel_region.h"
#include "tile_manager.h"
#include "gimprotatetool.h"
#include "tool_manager.h"
#include "tool_options.h"
#include "libgimp/gimpintl.h"
#include "pixmaps2.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;
/* public functions */
void
gimp_rotate_tool_register (void)
{
tool_manager_register_tool (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);
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,
(GtkSignalFunc) 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,
(GtkSignalFunc) 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,
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);
}
gtk_signal_handler_block_by_data (GTK_OBJECT (sizeentry), 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);
gtk_signal_handler_unblock_by_data (GTK_OBJECT (sizeentry), 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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