gimptransformtool.c 52.9 KB
Newer Older
Nate Summers's avatar
Nate Summers committed
1
/* The GIMP -- an image manipulation program
Nate Summers's avatar
Nate Summers committed
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
 * Copyright (C) 1995-2001 Spencer Kimball, Peter Mattis, and others
 *
 * 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 <stdlib.h>

#include <gtk/gtk.h>
24
#include <gdk/gdkkeysyms.h>
Nate Summers's avatar
Nate Summers committed
25 26 27 28

#include "libgimpmath/gimpmath.h"
#include "libgimpwidgets/gimpwidgets.h"

Michael Natterer's avatar
Michael Natterer committed
29
#include "tools-types.h"
30

Michael Natterer's avatar
Michael Natterer committed
31
#include "base/tile-manager.h"
32

Michael Natterer's avatar
Michael Natterer committed
33
#include "core/gimp.h"
34
#include "core/gimpchannel.h"
35
#include "core/gimpcontext.h"
Michael Natterer's avatar
Michael Natterer committed
36
#include "core/gimpdrawable-transform.h"
37
#include "core/gimpimage.h"
38
#include "core/gimpimage-undo.h"
39
#include "core/gimpimage-undo-push.h"
40
#include "core/gimpitem-linked.h"
41
#include "core/gimplayer.h"
Michael Natterer's avatar
Michael Natterer committed
42
#include "core/gimptoolinfo.h"
43

44 45 46
#include "vectors/gimpvectors.h"
#include "vectors/gimpstroke.h"

47
#include "widgets/gimpdialogfactory.h"
Michael Natterer's avatar
Michael Natterer committed
48 49
#include "widgets/gimpviewabledialog.h"

50
#include "display/gimpdisplay.h"
Michael Natterer's avatar
Michael Natterer committed
51
#include "display/gimpprogress.h"
52 53 54
#include "display/gimpdisplayshell.h"
#include "display/gimpdisplayshell-appearance.h"
#include "display/gimpdisplayshell-transform.h"
Nate Summers's avatar
Nate Summers committed
55

56 57 58 59
#ifdef __GNUC__
#warning FIXME #include "gui/gui-types.h"
#endif
#include "gui/gui-types.h"
60 61
#include "gui/info-dialog.h"

62
#include "gimptoolcontrol.h"
63
#include "gimptransformoptions.h"
64 65
#include "gimptransformtool.h"
#include "gimptransformtool-undo.h"
66

67
#include "gimp-intl.h"
Nate Summers's avatar
Nate Summers committed
68

69

70
#define HANDLE_SIZE 10
Michael Natterer's avatar
Michael Natterer committed
71

72

Michael Natterer's avatar
Michael Natterer committed
73 74 75 76 77
/*  local function prototypes  */

static void   gimp_transform_tool_init        (GimpTransformTool      *tool);
static void   gimp_transform_tool_class_init  (GimpTransformToolClass *tool);

78 79 80
static GObject * gimp_transform_tool_constructor   (GType              type,
                                                    guint              n_params,
                                                    GObjectConstructParam *params);
81
static void     gimp_transform_tool_finalize       (GObject           *object);
Michael Natterer's avatar
Michael Natterer committed
82

83
static gboolean gimp_transform_tool_initialize     (GimpTool          *tool,
84
                                                    GimpDisplay       *gdisp);
85
static void     gimp_transform_tool_control        (GimpTool          *tool,
86
                                                    GimpToolAction     action,
Michael Natterer's avatar
Michael Natterer committed
87
                                                    GimpDisplay       *gdisp);
88
static void     gimp_transform_tool_button_press   (GimpTool          *tool,
Michael Natterer's avatar
Michael Natterer committed
89 90 91 92
                                                    GimpCoords        *coords,
                                                    guint32            time,
                                                    GdkModifierType    state,
                                                    GimpDisplay       *gdisp);
93
static void     gimp_transform_tool_button_release (GimpTool          *tool,
Michael Natterer's avatar
Michael Natterer committed
94 95 96 97
                                                    GimpCoords        *coords,
                                                    guint32            time,
                                                    GdkModifierType    state,
                                                    GimpDisplay       *gdisp);
98
static void     gimp_transform_tool_motion         (GimpTool          *tool,
Michael Natterer's avatar
Michael Natterer committed
99 100 101 102
                                                    GimpCoords        *coords,
                                                    guint32            time,
                                                    GdkModifierType    state,
                                                    GimpDisplay       *gdisp);
103
static gboolean gimp_transform_tool_key_press      (GimpTool          *tool,
104 105
                                                    GdkEventKey       *kevent,
                                                    GimpDisplay       *gdisp);
106
static void     gimp_transform_tool_modifier_key   (GimpTool          *tool,
107 108 109 110
                                                    GdkModifierType    key,
                                                    gboolean           press,
                                                    GdkModifierType    state,
                                                    GimpDisplay       *gdisp);
111
static void     gimp_transform_tool_oper_update    (GimpTool          *tool,
112 113 114
                                                    GimpCoords        *coords,
                                                    GdkModifierType    state,
                                                    GimpDisplay       *gdisp);
115
static void     gimp_transform_tool_cursor_update  (GimpTool          *tool,
Michael Natterer's avatar
Michael Natterer committed
116 117 118 119
                                                    GimpCoords        *coords,
                                                    GdkModifierType    state,
                                                    GimpDisplay       *gdisp);

120
static void     gimp_transform_tool_draw           (GimpDrawTool      *draw_tool);
Michael Natterer's avatar
Michael Natterer committed
121

122
static TileManager *
123
                gimp_transform_tool_real_transform (GimpTransformTool *tr_tool,
124
                                                    GimpItem          *item,
125 126
                                                    GimpDisplay       *gdisp);

127 128
static void     gimp_transform_tool_halt           (GimpTransformTool *tr_tool);
static void     gimp_transform_tool_bounds         (GimpTransformTool *tr_tool,
Michael Natterer's avatar
Michael Natterer committed
129
                                                    GimpDisplay       *gdisp);
130 131
static void     gimp_transform_tool_dialog         (GimpTransformTool *tr_tool);
static void     gimp_transform_tool_prepare        (GimpTransformTool *tr_tool,
Michael Natterer's avatar
Michael Natterer committed
132
                                                    GimpDisplay       *gdisp);
133
static void     gimp_transform_tool_recalc         (GimpTransformTool *tr_tool,
Michael Natterer's avatar
Michael Natterer committed
134
                                                    GimpDisplay       *gdisp);
135
static void     gimp_transform_tool_doit           (GimpTransformTool *tr_tool,
Michael Natterer's avatar
Michael Natterer committed
136
                                                    GimpDisplay       *gdisp);
137
static void     gimp_transform_tool_grid_recalc    (GimpTransformTool *tr_tool);
Michael Natterer's avatar
Michael Natterer committed
138

139
static void     gimp_transform_tool_response       (GtkWidget         *widget,
140
                                                    gint               response_id,
Michael Natterer's avatar
Michael Natterer committed
141
                                                    GimpTransformTool *tr_tool);
142

143 144 145 146 147 148 149 150 151
static void     gimp_transform_tool_notify_type    (GimpTransformOptions *options,
                                                    GParamSpec           *pspec,
                                                    GimpTransformTool    *tr_tool);
static void     gimp_transform_tool_notify_grid    (GimpTransformOptions *options,
                                                    GParamSpec           *pspec,
                                                    GimpTransformTool    *tr_tool);
static void     gimp_transform_tool_notify_preview (GimpTransformOptions *options,
                                                    GParamSpec           *pspec,
                                                    GimpTransformTool    *tr_tool);
152

153
static GimpDrawToolClass *parent_class = NULL;
154

155 156

GType
Nate Summers's avatar
Nate Summers committed
157 158
gimp_transform_tool_get_type (void)
{
159
  static GType tool_type = 0;
Nate Summers's avatar
Nate Summers committed
160 161 162

  if (! tool_type)
    {
163
      static const GTypeInfo tool_info =
Nate Summers's avatar
Nate Summers committed
164 165
      {
        sizeof (GimpTransformToolClass),
166 167 168 169 170 171 172 173
        (GBaseInitFunc) NULL,
        (GBaseFinalizeFunc) NULL,
        (GClassInitFunc) gimp_transform_tool_class_init,
        NULL,           /* class_finalize */
        NULL,           /* class_data     */
        sizeof (GimpTransformTool),
        0,              /* n_preallocs    */
        (GInstanceInitFunc) gimp_transform_tool_init,
Nate Summers's avatar
Nate Summers committed
174 175
      };

176
      tool_type = g_type_register_static (GIMP_TYPE_DRAW_TOOL,
177
                                          "GimpTransformTool",
178
                                          &tool_info, 0);
Nate Summers's avatar
Nate Summers committed
179 180 181 182 183 184 185 186
    }

  return tool_type;
}

static void
gimp_transform_tool_class_init (GimpTransformToolClass *klass)
{
187 188 189
  GObjectClass      *object_class = G_OBJECT_CLASS (klass);
  GimpToolClass     *tool_class   = GIMP_TOOL_CLASS (klass);
  GimpDrawToolClass *draw_class   = GIMP_DRAW_TOOL_CLASS (klass);
Nate Summers's avatar
Nate Summers committed
190

191
  parent_class = g_type_class_peek_parent (klass);
Nate Summers's avatar
Nate Summers committed
192

193
  object_class->constructor  = gimp_transform_tool_constructor;
194
  object_class->finalize     = gimp_transform_tool_finalize;
Nate Summers's avatar
Nate Summers committed
195

196
  tool_class->initialize     = gimp_transform_tool_initialize;
197
  tool_class->control        = gimp_transform_tool_control;
Nate Summers's avatar
Nate Summers committed
198 199 200
  tool_class->button_press   = gimp_transform_tool_button_press;
  tool_class->button_release = gimp_transform_tool_button_release;
  tool_class->motion         = gimp_transform_tool_motion;
201
  tool_class->key_press      = gimp_transform_tool_key_press;
202
  tool_class->modifier_key   = gimp_transform_tool_modifier_key;
203
  tool_class->oper_update    = gimp_transform_tool_oper_update;
Nate Summers's avatar
Nate Summers committed
204
  tool_class->cursor_update  = gimp_transform_tool_cursor_update;
Nate Summers's avatar
Nate Summers committed
205 206

  draw_class->draw           = gimp_transform_tool_draw;
Michael Natterer's avatar
Michael Natterer committed
207 208 209 210 211

  klass->dialog              = NULL;
  klass->prepare             = NULL;
  klass->motion              = NULL;
  klass->recalc              = NULL;
212
  klass->transform           = gimp_transform_tool_real_transform;
Nate Summers's avatar
Nate Summers committed
213 214 215
}

static void
Michael Natterer's avatar
Michael Natterer committed
216
gimp_transform_tool_init (GimpTransformTool *tr_tool)
Nate Summers's avatar
Nate Summers committed
217
{
Michael Natterer's avatar
Michael Natterer committed
218
  GimpTool *tool;
219
  gint      i;
Nate Summers's avatar
Nate Summers committed
220

Michael Natterer's avatar
Michael Natterer committed
221
  tool = GIMP_TOOL (tr_tool);
Michael Natterer's avatar
Michael Natterer committed
222

Michael Natterer's avatar
Michael Natterer committed
223 224 225
  gimp_tool_control_set_scroll_lock (tool->control, TRUE);
  gimp_tool_control_set_preserve    (tool->control, FALSE);

Michael Natterer's avatar
Michael Natterer committed
226 227
  tr_tool->function = TRANSFORM_CREATING;
  tr_tool->original = NULL;
Nate Summers's avatar
Nate Summers committed
228 229

  for (i = 0; i < TRAN_INFO_SIZE; i++)
230
    {
Michael Natterer's avatar
Michael Natterer committed
231 232
      tr_tool->trans_info[i]     = 0.0;
      tr_tool->old_trans_info[i] = 0.0;
233
    }
Nate Summers's avatar
Nate Summers committed
234

235
  gimp_matrix3_identity (&tr_tool->transform);
236

237 238 239 240 241 242 243
  tr_tool->use_grid         = TRUE;
  tr_tool->use_center       = TRUE;
  tr_tool->ngx              = 0;
  tr_tool->ngy              = 0;
  tr_tool->grid_coords      = NULL;
  tr_tool->tgrid_coords     = NULL;

244
  tr_tool->type             = GIMP_TRANSFORM_TYPE_LAYER;
245
  tr_tool->direction        = GIMP_TRANSFORM_FORWARD;
246

247 248 249
  tr_tool->shell_desc       = NULL;
  tr_tool->progress_text    = _("Transforming...");
  tr_tool->info_dialog      = NULL;
Nate Summers's avatar
Nate Summers committed
250 251
}

252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278
static GObject *
gimp_transform_tool_constructor (GType                  type,
                                 guint                  n_params,
                                 GObjectConstructParam *params)
{
  GObject           *object;
  GimpTool          *tool;
  GimpTransformTool *tr_tool;

  object = G_OBJECT_CLASS (parent_class)->constructor (type, n_params, params);

  tool    = GIMP_TOOL (object);
  tr_tool = GIMP_TRANSFORM_TOOL (object);

  g_assert (GIMP_IS_TOOL_INFO (tool->tool_info));

  if (tr_tool->use_grid)
    {
      tr_tool->type =
        GIMP_TRANSFORM_OPTIONS (tool->tool_info->tool_options)->type;
      tr_tool->direction =
        GIMP_TRANSFORM_OPTIONS (tool->tool_info->tool_options)->direction;

      g_signal_connect_object (tool->tool_info->tool_options,
                               "notify::type",
                               G_CALLBACK (gimp_transform_tool_notify_type),
                               tr_tool, 0);
279 280 281 282
      g_signal_connect_object (tool->tool_info->tool_options,
                               "notify::type",
                               G_CALLBACK (gimp_transform_tool_notify_preview),
                               tr_tool, 0);
283 284 285 286
      g_signal_connect_object (tool->tool_info->tool_options,
                               "notify::direction",
                               G_CALLBACK (gimp_transform_tool_notify_type),
                               tr_tool, 0);
287 288 289 290
      g_signal_connect_object (tool->tool_info->tool_options,
                               "notify::direction",
                               G_CALLBACK (gimp_transform_tool_notify_preview),
                               tr_tool, 0);
291 292 293 294 295 296 297 298
      g_signal_connect_object (tool->tool_info->tool_options,
                               "notify::grid-type",
                               G_CALLBACK (gimp_transform_tool_notify_grid),
                               tr_tool, 0);
      g_signal_connect_object (tool->tool_info->tool_options,
                               "notify::grid-size",
                               G_CALLBACK (gimp_transform_tool_notify_grid),
                               tr_tool, 0);
299 300 301 302
      g_signal_connect_object (tool->tool_info->tool_options,
                               "notify::show-preview",
                               G_CALLBACK (gimp_transform_tool_notify_preview),
                               tr_tool, 0);
303 304 305 306 307
    }

  return object;
}

308
static void
309
gimp_transform_tool_finalize (GObject *object)
Nate Summers's avatar
Nate Summers committed
310
{
311
  GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (object);
312 313

  if (tr_tool->original)
314
    {
315
      tile_manager_unref (tr_tool->original);
316 317
      tr_tool->original = NULL;
    }
318

319
  if (tr_tool->info_dialog)
320
    {
321 322
      info_dialog_free (tr_tool->info_dialog);
      tr_tool->info_dialog = NULL;
323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339
    }

  if (tr_tool->grid_coords)
    {
      g_free (tr_tool->grid_coords);
      tr_tool->grid_coords = NULL;
    }

  if (tr_tool->tgrid_coords)
    {
      g_free (tr_tool->tgrid_coords);
      tr_tool->tgrid_coords = NULL;
    }

  G_OBJECT_CLASS (parent_class)->finalize (object);
}

340
static gboolean
341
gimp_transform_tool_initialize (GimpTool    *tool,
342
                                GimpDisplay *gdisp)
343 344 345 346 347 348
{
  GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tool);

  if (gdisp != tool->gdisp)
    {
      GimpDrawable *drawable = gimp_image_active_drawable (gdisp->gimage);
349
      gint          i;
350 351 352 353

      if (GIMP_IS_LAYER (drawable) &&
          gimp_layer_get_mask (GIMP_LAYER (drawable)))
        {
354
          g_message (_("Transformations do not work on "
355
                       "layers that contain layer masks."));
356
          return FALSE;
357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384
        }

      /*  Set the pointer to the active display  */
      tool->gdisp    = gdisp;
      tool->drawable = drawable;

      /*  Initialize the transform tool dialog */
      if (! tr_tool->info_dialog)
        gimp_transform_tool_dialog (tr_tool);

      /*  Find the transform bounds for some tools (like scale,
       *  perspective) that actually need the bounds for
       *  initializing
       */
      gimp_transform_tool_bounds (tr_tool, gdisp);

      gimp_transform_tool_prepare (tr_tool, gdisp);

      /*  Recalculate the transform tool  */
      gimp_transform_tool_recalc (tr_tool, gdisp);

      /*  start drawing the bounding box and handles...  */
      gimp_draw_tool_start (GIMP_DRAW_TOOL (tool), gdisp);

      tr_tool->function = TRANSFORM_CREATING;

      /*  Save the current transformation info  */
      for (i = 0; i < TRAN_INFO_SIZE; i++)
385
        tr_tool->old_trans_info[i] = tr_tool->trans_info[i];
386
    }
387 388

  return TRUE;
389 390
}

391
static void
392
gimp_transform_tool_control (GimpTool       *tool,
393 394
                             GimpToolAction  action,
                             GimpDisplay    *gdisp)
395
{
396
  GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tool);
397

398 399 400 401
  switch (action)
    {
    case PAUSE:
      break;
402

403
    case RESUME:
Michael Natterer's avatar
Michael Natterer committed
404
      gimp_transform_tool_recalc (tr_tool, gdisp);
405
      break;
406

407
    case HALT:
408
      gimp_transform_tool_halt (tr_tool);
409
      return; /* don't upchain */
410
      break;
411

412 413 414 415
    default:
      break;
    }

Michael Natterer's avatar
Michael Natterer committed
416
  GIMP_TOOL_CLASS (parent_class)->control (tool, action, gdisp);
417 418 419
}

static void
420 421 422 423
gimp_transform_tool_button_press (GimpTool        *tool,
                                  GimpCoords      *coords,
                                  guint32          time,
                                  GdkModifierType  state,
424
                                  GimpDisplay     *gdisp)
Nate Summers's avatar
Nate Summers committed
425
{
426
  GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tool);
Nate Summers's avatar
Nate Summers committed
427

428 429
  if (tr_tool->function == TRANSFORM_CREATING && tr_tool->use_grid)
    gimp_transform_tool_oper_update (tool, coords, state, gdisp);
430

431 432
  tr_tool->lastx = tr_tool->startx = coords->x;
  tr_tool->lasty = tr_tool->starty = coords->y;
Nate Summers's avatar
Nate Summers committed
433

434
  gimp_tool_control_activate (tool->control);
Nate Summers's avatar
Nate Summers committed
435 436
}

437
static void
438 439 440
gimp_transform_tool_button_release (GimpTool        *tool,
                                    GimpCoords      *coords,
                                    guint32          time,
441 442
                                    GdkModifierType  state,
                                    GimpDisplay     *gdisp)
Nate Summers's avatar
Nate Summers committed
443
{
444
  GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tool);
Nate Summers's avatar
Nate Summers committed
445
  gint               i;
Nate Summers's avatar
Nate Summers committed
446 447

  /*  if we are creating, there is nothing to be done...exit  */
448
  if (tr_tool->function == TRANSFORM_CREATING && tr_tool->use_grid)
Nate Summers's avatar
Nate Summers committed
449 450 451
    return;

  /*  if the 3rd button isn't pressed, transform the selected mask  */
452
  if (! (state & GDK_BUTTON3_MASK))
Nate Summers's avatar
Nate Summers committed
453 454
    {
      /* Shift-clicking is another way to approve the transform  */
455
      if ((state & GDK_SHIFT_MASK) || ! tr_tool->use_grid)
456 457 458
        {
          gimp_transform_tool_doit (tr_tool, gdisp);
        }
Nate Summers's avatar
Nate Summers committed
459 460 461
    }
  else
    {
462
      gimp_draw_tool_pause (GIMP_DRAW_TOOL (tool));
Nate Summers's avatar
Nate Summers committed
463 464 465

      /*  Restore the previous transformation info  */
      for (i = 0; i < TRAN_INFO_SIZE; i++)
466
        tr_tool->trans_info[i] = tr_tool->old_trans_info[i];
Nate Summers's avatar
Nate Summers committed
467 468

      /*  recalculate the tool's transformation matrix  */
Michael Natterer's avatar
Michael Natterer committed
469
      gimp_transform_tool_recalc (tr_tool, gdisp);
Nate Summers's avatar
Nate Summers committed
470

471
      gimp_draw_tool_resume (GIMP_DRAW_TOOL (tool));
Nate Summers's avatar
Nate Summers committed
472
    }
473 474

  gimp_tool_control_halt (tool->control);
Nate Summers's avatar
Nate Summers committed
475 476
}

477
static void
478 479 480
gimp_transform_tool_motion (GimpTool        *tool,
                            GimpCoords      *coords,
                            guint32          time,
481 482
                            GdkModifierType  state,
                            GimpDisplay     *gdisp)
Nate Summers's avatar
Nate Summers committed
483
{
484
  GimpTransformTool      *tr_tool = GIMP_TRANSFORM_TOOL (tool);
Michael Natterer's avatar
Michael Natterer committed
485
  GimpTransformToolClass *tr_tool_class;
Nate Summers's avatar
Nate Summers committed
486

487
  /*  if we are creating, there is nothing to be done so exit.  */
488
  if (tr_tool->function == TRANSFORM_CREATING || ! tr_tool->use_grid)
Nate Summers's avatar
Nate Summers committed
489 490
    return;

491
  gimp_draw_tool_pause (GIMP_DRAW_TOOL (tool));
Nate Summers's avatar
Nate Summers committed
492

Michael Natterer's avatar
Michael Natterer committed
493 494 495
  tr_tool->curx  = coords->x;
  tr_tool->cury  = coords->y;
  tr_tool->state = state;
Nate Summers's avatar
Nate Summers committed
496 497

  /*  recalculate the tool's transformation matrix  */
Michael Natterer's avatar
Michael Natterer committed
498 499 500 501 502
  tr_tool_class = GIMP_TRANSFORM_TOOL_GET_CLASS (tr_tool);

  if (tr_tool_class->motion)
    {
      tr_tool_class->motion (tr_tool, gdisp);
Nate Summers's avatar
Nate Summers committed
503

504 505
      gimp_transform_tool_expose_preview (tr_tool);

Michael Natterer's avatar
Michael Natterer committed
506 507 508 509 510 511
      if (tr_tool_class->recalc)
        tr_tool_class->recalc (tr_tool, gdisp);
    }

  tr_tool->lastx = tr_tool->curx;
  tr_tool->lasty = tr_tool->cury;
Nate Summers's avatar
Nate Summers committed
512

513
  gimp_draw_tool_resume (GIMP_DRAW_TOOL (tool));
Nate Summers's avatar
Nate Summers committed
514 515
}

516 517
#define RESPONSE_RESET 1

518
static gboolean
519 520 521 522 523 524 525 526 527 528 529
gimp_transform_tool_key_press (GimpTool    *tool,
                               GdkEventKey *kevent,
                               GimpDisplay *gdisp)
{
  GimpTransformTool *trans_tool = GIMP_TRANSFORM_TOOL (tool);
  GimpDrawTool      *draw_tool = GIMP_DRAW_TOOL (tool);

  if (gdisp == draw_tool->gdisp)
    {
      switch (kevent->keyval)
        {
530 531 532
        case GDK_KP_Enter:
        case GDK_Return:
          gimp_transform_tool_response (NULL, GTK_RESPONSE_OK, trans_tool);
533
          return TRUE;
534 535 536 537

        case GDK_Delete:
        case GDK_BackSpace:
          gimp_transform_tool_response (NULL, RESPONSE_RESET, trans_tool);
538
          return TRUE;
539 540
        }
    }
541 542

  return FALSE;
543 544
}

545 546 547 548 549 550 551
static void
gimp_transform_tool_modifier_key (GimpTool        *tool,
                                  GdkModifierType  key,
                                  gboolean         press,
                                  GdkModifierType  state,
                                  GimpDisplay     *gdisp)
{
552
  GimpTransformOptions *options;
553

554
  options = GIMP_TRANSFORM_OPTIONS (tool->tool_info->tool_options);
555

556
  if (key == GDK_CONTROL_MASK)
557
    {
558
      g_object_set (options,
559 560
                    "constrain-1", ! options->constrain_1,
                    NULL);
561
    }
562
  else if (key == GDK_MOD1_MASK)
563
    {
564
      g_object_set (options,
565 566
                    "constrain-2", ! options->constrain_2,
                    NULL);
567 568 569
    }
}

570 571 572 573 574 575
static void
gimp_transform_tool_oper_update (GimpTool        *tool,
                                 GimpCoords      *coords,
                                 GdkModifierType  state,
                                 GimpDisplay     *gdisp)
{
576 577
  GimpTransformTool *tr_tool   = GIMP_TRANSFORM_TOOL (tool);
  GimpDrawTool      *draw_tool = GIMP_DRAW_TOOL (tool);
578

579 580 581
  if (! tr_tool->use_grid)
    return;

582 583 584 585 586 587 588 589 590 591 592 593 594 595
  if (gdisp == tool->gdisp)
    {
      gdouble closest_dist;
      gdouble dist;

      closest_dist = gimp_draw_tool_calc_distance (draw_tool, gdisp,
                                                   coords->x, coords->y,
                                                   tr_tool->tx1, tr_tool->ty1);
      tr_tool->function = TRANSFORM_HANDLE_1;

      dist = gimp_draw_tool_calc_distance (draw_tool, gdisp,
                                           coords->x, coords->y,
                                           tr_tool->tx2, tr_tool->ty2);
      if (dist < closest_dist)
596 597 598 599
        {
          closest_dist = dist;
          tr_tool->function = TRANSFORM_HANDLE_2;
        }
600 601 602 603 604

      dist = gimp_draw_tool_calc_distance (draw_tool, gdisp,
                                           coords->x, coords->y,
                                           tr_tool->tx3, tr_tool->ty3);
      if (dist < closest_dist)
605 606 607 608
        {
          closest_dist = dist;
          tr_tool->function = TRANSFORM_HANDLE_3;
        }
609 610 611 612 613

      dist = gimp_draw_tool_calc_distance (draw_tool, gdisp,
                                           coords->x, coords->y,
                                           tr_tool->tx4, tr_tool->ty4);
      if (dist < closest_dist)
614 615 616 617
        {
          closest_dist = dist;
          tr_tool->function = TRANSFORM_HANDLE_4;
        }
618 619 620 621 622

      if (gimp_draw_tool_on_handle (draw_tool, gdisp,
                                    coords->x, coords->y,
                                    GIMP_HANDLE_CIRCLE,
                                    tr_tool->tcx, tr_tool->tcy,
623
                                    HANDLE_SIZE, HANDLE_SIZE,
624 625
                                    GTK_ANCHOR_CENTER,
                                    FALSE))
626 627 628
        {
          tr_tool->function = TRANSFORM_HANDLE_CENTER;
        }
629 630 631
    }
}

632
static void
633 634
gimp_transform_tool_cursor_update (GimpTool        *tool,
                                   GimpCoords      *coords,
635 636
                                   GdkModifierType  state,
                                   GimpDisplay     *gdisp)
Nate Summers's avatar
Nate Summers committed
637
{
638
  GimpTransformTool    *tr_tool = GIMP_TRANSFORM_TOOL (tool);
639
  GimpTransformOptions *options;
640

641
  options = GIMP_TRANSFORM_OPTIONS (tool->tool_info->tool_options);
Nate Summers's avatar
Nate Summers committed
642

Michael Natterer's avatar
Michael Natterer committed
643
  if (tr_tool->use_grid)
Nate Summers's avatar
Nate Summers committed
644
    {
645
      GimpChannel        *selection = gimp_image_get_mask (gdisp->gimage);
646 647
      GimpCursorType      cursor    = GDK_TOP_LEFT_ARROW;
      GimpCursorModifier  modifier  = GIMP_CURSOR_MODIFIER_NONE;
648

649
      switch (options->type)
Michael Natterer's avatar
Michael Natterer committed
650
        {
651 652
        case GIMP_TRANSFORM_TYPE_LAYER:
          {
653
            GimpDrawable *drawable = gimp_image_active_drawable (gdisp->gimage);
654 655 656 657 658 659

            if (drawable)
              {
                if (GIMP_IS_LAYER (drawable) &&
                    gimp_layer_get_mask (GIMP_LAYER (drawable)))
                  {
660
                    cursor = GIMP_CURSOR_BAD;
661 662 663
                  }
                else if (gimp_display_coords_in_active_drawable (gdisp, coords))
                  {
664 665
                    if (gimp_channel_is_empty (selection) ||
                        gimp_channel_value (selection, coords->x, coords->y))
666
                      {
667
                        cursor = GIMP_CURSOR_MOUSE;
668 669 670 671 672 673 674
                      }
                  }
              }
          }
          break;

        case GIMP_TRANSFORM_TYPE_SELECTION:
675 676
          if (gimp_channel_is_empty (selection) ||
              gimp_channel_value (selection, coords->x, coords->y))
Michael Natterer's avatar
Michael Natterer committed
677
            {
678
              cursor = GIMP_CURSOR_MOUSE;
Michael Natterer's avatar
Michael Natterer committed
679
            }
680 681 682 683
          break;

        case GIMP_TRANSFORM_TYPE_PATH:
          if (gimp_image_get_active_vectors (gdisp->gimage))
684
            cursor = GIMP_CURSOR_MOUSE;
685
          else
686
            cursor = GIMP_CURSOR_BAD;
687
          break;
Michael Natterer's avatar
Michael Natterer committed
688
        }
689

Michael Natterer's avatar
Michael Natterer committed
690 691
      if (tr_tool->use_center && tr_tool->function == TRANSFORM_HANDLE_CENTER)
        {
692
          modifier = GIMP_CURSOR_MODIFIER_MOVE;
Michael Natterer's avatar
Michael Natterer committed
693 694
        }

695 696
      gimp_tool_control_set_cursor          (tool->control, cursor);
      gimp_tool_control_set_cursor_modifier (tool->control, modifier);
Michael Natterer's avatar
Michael Natterer committed
697
    }
698 699

  GIMP_TOOL_CLASS (parent_class)->cursor_update (tool, coords, state, gdisp);
Nate Summers's avatar
Nate Summers committed
700 701
}

702
static void
703
gimp_transform_tool_draw (GimpDrawTool *draw_tool)
Nate Summers's avatar
Nate Summers committed
704
{
705 706
  GimpTool             *tool    = GIMP_TOOL (draw_tool);
  GimpTransformTool    *tr_tool = GIMP_TRANSFORM_TOOL (draw_tool);
707
  GimpTransformOptions *options;
708
  gdouble               z1, z2, z3, z4;
Nate Summers's avatar
Nate Summers committed
709

710 711 712
  if (! tr_tool->use_grid)
    return;

713
  options = GIMP_TRANSFORM_OPTIONS (tool->tool_info->tool_options);
714

Nate Summers's avatar
Nate Summers committed
715
  /*  draw the bounding box  */
716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731
  gimp_draw_tool_draw_line (draw_tool,
                            tr_tool->tx1, tr_tool->ty1,
                            tr_tool->tx2, tr_tool->ty2,
                            FALSE);
  gimp_draw_tool_draw_line (draw_tool,
                            tr_tool->tx2, tr_tool->ty2,
                            tr_tool->tx4, tr_tool->ty4,
                            FALSE);
  gimp_draw_tool_draw_line (draw_tool,
                            tr_tool->tx3, tr_tool->ty3,
                            tr_tool->tx4, tr_tool->ty4,
                            FALSE);
  gimp_draw_tool_draw_line (draw_tool,
                            tr_tool->tx3, tr_tool->ty3,
                            tr_tool->tx1, tr_tool->ty1,
                            FALSE);
Nate Summers's avatar
Nate Summers committed
732

733 734
  /* We test if the transformed polygon is convex.
   * if z1 and z2 have the same sign as well as z3 and z4
735 736
   * the polygon is convex.
   */
737 738 739 740 741 742 743 744
  z1 = ((tr_tool->tx2 - tr_tool->tx1) * (tr_tool->ty4 - tr_tool->ty1) -
        (tr_tool->tx4 - tr_tool->tx1) * (tr_tool->ty2 - tr_tool->ty1));
  z2 = ((tr_tool->tx4 - tr_tool->tx1) * (tr_tool->ty3 - tr_tool->ty1) -
        (tr_tool->tx3 - tr_tool->tx1) * (tr_tool->ty4 - tr_tool->ty1));
  z3 = ((tr_tool->tx4 - tr_tool->tx2) * (tr_tool->ty3 - tr_tool->ty2) -
        (tr_tool->tx3 - tr_tool->tx2) * (tr_tool->ty4 - tr_tool->ty2));
  z4 = ((tr_tool->tx3 - tr_tool->tx2) * (tr_tool->ty1 - tr_tool->ty2) -
        (tr_tool->tx1 - tr_tool->tx2) * (tr_tool->ty3 - tr_tool->ty2));
745

746
  /*  Draw the grid (not for path transform since it looks ugly)  */
Nate Summers's avatar
Nate Summers committed
747

748 749 750
  if (tr_tool->type != GIMP_TRANSFORM_TYPE_PATH &&
      tr_tool->grid_coords                      &&
      tr_tool->tgrid_coords                     &&
751 752
      z1 * z2 > 0                               &&
      z3 * z4 > 0)
Nate Summers's avatar
Nate Summers committed
753
    {
754 755
      gint gci, i, k;

Nate Summers's avatar
Nate Summers committed
756
      k = tr_tool->ngx + tr_tool->ngy;
757

758
      for (i = 0, gci = 0; i < k; i++, gci += 4)
759
        {
760 761 762 763 764 765
          gimp_draw_tool_draw_line (draw_tool,
                                    tr_tool->tgrid_coords[gci],
                                    tr_tool->tgrid_coords[gci + 1],
                                    tr_tool->tgrid_coords[gci + 2],
                                    tr_tool->tgrid_coords[gci + 3],
                                    FALSE);
766
        }
Nate Summers's avatar
Nate Summers committed
767 768 769
    }

  /*  draw the tool handles  */
770 771 772
  gimp_draw_tool_draw_handle (draw_tool,
                              GIMP_HANDLE_SQUARE,
                              tr_tool->tx1, tr_tool->ty1,
773
                              HANDLE_SIZE, HANDLE_SIZE,
774 775 776 777 778
                              GTK_ANCHOR_CENTER,
                              FALSE);
  gimp_draw_tool_draw_handle (draw_tool,
                              GIMP_HANDLE_SQUARE,
                              tr_tool->tx2, tr_tool->ty2,
779
                              HANDLE_SIZE, HANDLE_SIZE,
780 781 782 783 784
                              GTK_ANCHOR_CENTER,
                              FALSE);
  gimp_draw_tool_draw_handle (draw_tool,
                              GIMP_HANDLE_SQUARE,
                              tr_tool->tx3, tr_tool->ty3,
785
                              HANDLE_SIZE, HANDLE_SIZE,
786 787 788 789 790
                              GTK_ANCHOR_CENTER,
                              FALSE);
  gimp_draw_tool_draw_handle (draw_tool,
                              GIMP_HANDLE_SQUARE,
                              tr_tool->tx4, tr_tool->ty4,
791
                              HANDLE_SIZE, HANDLE_SIZE,
792 793
                              GTK_ANCHOR_CENTER,
                              FALSE);
Nate Summers's avatar
Nate Summers committed
794 795

  /*  draw the center  */
796 797 798 799 800
  if (tr_tool->use_center)
    {
      gimp_draw_tool_draw_handle (draw_tool,
                                  GIMP_HANDLE_FILLED_CIRCLE,
                                  tr_tool->tcx, tr_tool->tcy,
801
                                  HANDLE_SIZE, HANDLE_SIZE,
802 803 804
                                  GTK_ANCHOR_CENTER,
                                  FALSE);
    }
Nate Summers's avatar
Nate Summers committed
805

806
  if (tr_tool->type == GIMP_TRANSFORM_TYPE_PATH)
Nate Summers's avatar
Nate Summers committed
807
    {
808 809 810
      GimpVectors *vectors;
      GimpStroke  *stroke = NULL;
      GimpMatrix3  matrix = tr_tool->transform;
811

812 813 814
      vectors = gimp_image_get_active_vectors (tool->gdisp->gimage);

      if (vectors)
815
        {
816 817 818 819 820 821 822 823 824 825
          if (tr_tool->direction == GIMP_TRANSFORM_BACKWARD)
            gimp_matrix3_invert (&matrix);

          while ((stroke = gimp_vectors_stroke_get_next (vectors, stroke)))
            {
              GArray   *coords;
              gboolean  closed;

              coords = gimp_stroke_interpolate (stroke, 1.0, &closed);

826
              if (coords && coords->len)
827
                {
828 829
                  gint i;

830 831 832 833 834 835 836 837 838
                  for (i = 0; i < coords->len; i++)
                    {
                      GimpCoords *curr = &g_array_index (coords, GimpCoords, i);

                      gimp_matrix3_transform_point (&matrix,
                                                    curr->x, curr->y,
                                                    &curr->x, &curr->y);
                    }

839 840 841 842
                  gimp_draw_tool_draw_strokes (draw_tool,
                                               &g_array_index (coords,
                                                               GimpCoords, 0),
                                               coords->len, FALSE, FALSE);
Michael Natterer's avatar