gimptransformtool.c 55.1 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_doit           (GimpTransformTool *tr_tool,
Michael Natterer's avatar
Michael Natterer committed
134
                                                    GimpDisplay       *gdisp);
Michael Natterer's avatar
Michael Natterer committed
135
static void     gimp_transform_tool_transform_bounding_box (GimpTransformTool *tr_tool);
136
static void     gimp_transform_tool_grid_recalc    (GimpTransformTool *tr_tool);
Michael Natterer's avatar
Michael Natterer committed
137

138 139
static void     gimp_transform_tool_force_expose_preview (GimpTransformTool *tr_tool);

140
static void     gimp_transform_tool_response       (GtkWidget         *widget,
141
                                                    gint               response_id,
Michael Natterer's avatar
Michael Natterer committed
142
                                                    GimpTransformTool *tr_tool);
143

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

151
static GimpDrawToolClass *parent_class = NULL;
152

153 154

GType
Nate Summers's avatar
Nate Summers committed
155 156
gimp_transform_tool_get_type (void)
{
157
  static GType tool_type = 0;
Nate Summers's avatar
Nate Summers committed
158 159 160

  if (! tool_type)
    {
161
      static const GTypeInfo tool_info =
Nate Summers's avatar
Nate Summers committed
162 163
      {
        sizeof (GimpTransformToolClass),
164 165 166 167 168 169 170 171
        (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
172 173
      };

174
      tool_type = g_type_register_static (GIMP_TYPE_DRAW_TOOL,
175
                                          "GimpTransformTool",
176
                                          &tool_info, 0);
Nate Summers's avatar
Nate Summers committed
177 178 179 180 181 182 183 184
    }

  return tool_type;
}

static void
gimp_transform_tool_class_init (GimpTransformToolClass *klass)
{
185 186 187
  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
188

189
  parent_class = g_type_class_peek_parent (klass);
Nate Summers's avatar
Nate Summers committed
190

191
  object_class->constructor  = gimp_transform_tool_constructor;
192
  object_class->finalize     = gimp_transform_tool_finalize;
Nate Summers's avatar
Nate Summers committed
193

194
  tool_class->initialize     = gimp_transform_tool_initialize;
195
  tool_class->control        = gimp_transform_tool_control;
Nate Summers's avatar
Nate Summers committed
196 197 198
  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;
199
  tool_class->key_press      = gimp_transform_tool_key_press;
200
  tool_class->modifier_key   = gimp_transform_tool_modifier_key;
201
  tool_class->oper_update    = gimp_transform_tool_oper_update;
Nate Summers's avatar
Nate Summers committed
202
  tool_class->cursor_update  = gimp_transform_tool_cursor_update;
Nate Summers's avatar
Nate Summers committed
203 204

  draw_class->draw           = gimp_transform_tool_draw;
Michael Natterer's avatar
Michael Natterer committed
205 206

  klass->dialog              = NULL;
Michael Natterer's avatar
Michael Natterer committed
207
  klass->dialog_update       = NULL;
Michael Natterer's avatar
Michael Natterer committed
208 209 210
  klass->prepare             = NULL;
  klass->motion              = NULL;
  klass->recalc              = NULL;
211
  klass->transform           = gimp_transform_tool_real_transform;
Nate Summers's avatar
Nate Summers committed
212 213 214
}

static void
Michael Natterer's avatar
Michael Natterer committed
215
gimp_transform_tool_init (GimpTransformTool *tr_tool)
Nate Summers's avatar
Nate Summers committed
216
{
Michael Natterer's avatar
Michael Natterer committed
217
  GimpTool *tool;
218
  gint      i;
Nate Summers's avatar
Nate Summers committed
219

Michael Natterer's avatar
Michael Natterer committed
220
  tool = GIMP_TOOL (tr_tool);
Michael Natterer's avatar
Michael Natterer committed
221

Michael Natterer's avatar
Michael Natterer committed
222 223
  gimp_tool_control_set_scroll_lock (tool->control, TRUE);
  gimp_tool_control_set_preserve    (tool->control, FALSE);
224 225 226 227
  gimp_tool_control_set_dirty_mask  (tool->control,
                                     GIMP_DIRTY_IMAGE_SIZE |
                                     GIMP_DIRTY_DRAWABLE   |
                                     GIMP_DIRTY_SELECTION);
Michael Natterer's avatar
Michael Natterer committed
228

Michael Natterer's avatar
Michael Natterer committed
229 230
  tr_tool->function = TRANSFORM_CREATING;
  tr_tool->original = NULL;
Nate Summers's avatar
Nate Summers committed
231 232

  for (i = 0; i < TRAN_INFO_SIZE; i++)
233
    {
Michael Natterer's avatar
Michael Natterer committed
234 235
      tr_tool->trans_info[i]     = 0.0;
      tr_tool->old_trans_info[i] = 0.0;
236
    }
Nate Summers's avatar
Nate Summers committed
237

238
  gimp_matrix3_identity (&tr_tool->transform);
239

240 241 242 243 244 245 246
  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;

247
  tr_tool->type             = GIMP_TRANSFORM_TYPE_LAYER;
248
  tr_tool->direction        = GIMP_TRANSFORM_FORWARD;
249

250 251 252
  tr_tool->shell_desc       = NULL;
  tr_tool->progress_text    = _("Transforming...");
  tr_tool->info_dialog      = NULL;
Nate Summers's avatar
Nate Summers committed
253 254
}

255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281
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);
282 283 284 285
      g_signal_connect_object (tool->tool_info->tool_options,
                               "notify::type",
                               G_CALLBACK (gimp_transform_tool_notify_preview),
                               tr_tool, 0);
286 287 288 289
      g_signal_connect_object (tool->tool_info->tool_options,
                               "notify::direction",
                               G_CALLBACK (gimp_transform_tool_notify_type),
                               tr_tool, 0);
290 291 292 293
      g_signal_connect_object (tool->tool_info->tool_options,
                               "notify::direction",
                               G_CALLBACK (gimp_transform_tool_notify_preview),
                               tr_tool, 0);
294
      g_signal_connect_object (tool->tool_info->tool_options,
295 296
                               "notify::preview-type",
                               G_CALLBACK (gimp_transform_tool_notify_preview),
297 298
                               tr_tool, 0);
      g_signal_connect_object (tool->tool_info->tool_options,
299 300
                               "notify::grid-type",
                               G_CALLBACK (gimp_transform_tool_notify_preview),
301
                               tr_tool, 0);
302
      g_signal_connect_object (tool->tool_info->tool_options,
303
                               "notify::grid-size",
304 305
                               G_CALLBACK (gimp_transform_tool_notify_preview),
                               tr_tool, 0);
306 307 308 309 310
    }

  return object;
}

311
static void
312
gimp_transform_tool_finalize (GObject *object)
Nate Summers's avatar
Nate Summers committed
313
{
314
  GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (object);
315 316

  if (tr_tool->original)
317
    {
318
      tile_manager_unref (tr_tool->original);
319 320
      tr_tool->original = NULL;
    }
321

322
  if (tr_tool->info_dialog)
323
    {
324 325
      info_dialog_free (tr_tool->info_dialog);
      tr_tool->info_dialog = NULL;
326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342
    }

  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);
}

343
static gboolean
344
gimp_transform_tool_initialize (GimpTool    *tool,
345
                                GimpDisplay *gdisp)
346 347 348 349 350 351
{
  GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tool);

  if (gdisp != tool->gdisp)
    {
      GimpDrawable *drawable = gimp_image_active_drawable (gdisp->gimage);
352
      gint          i;
353 354 355 356

      if (GIMP_IS_LAYER (drawable) &&
          gimp_layer_get_mask (GIMP_LAYER (drawable)))
        {
357
          g_message (_("Transformations do not work on "
358
                       "layers that contain layer masks."));
359
          return FALSE;
360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387
        }

      /*  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++)
388
        tr_tool->old_trans_info[i] = tr_tool->trans_info[i];
389
    }
390 391

  return TRUE;
392 393
}

394
static void
395
gimp_transform_tool_control (GimpTool       *tool,
396 397
                             GimpToolAction  action,
                             GimpDisplay    *gdisp)
398
{
399
  GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tool);
400

401 402 403 404
  switch (action)
    {
    case PAUSE:
      break;
405

406
    case RESUME:
Michael Natterer's avatar
Michael Natterer committed
407
      gimp_transform_tool_bounds (tr_tool, gdisp);
Michael Natterer's avatar
Michael Natterer committed
408
      gimp_transform_tool_recalc (tr_tool, gdisp);
409
      break;
410

411
    case HALT:
412
      gimp_transform_tool_halt (tr_tool);
413
      return; /* don't upchain */
414
      break;
415

416 417 418 419
    default:
      break;
    }

Michael Natterer's avatar
Michael Natterer committed
420
  GIMP_TOOL_CLASS (parent_class)->control (tool, action, gdisp);
421 422 423
}

static void
424 425 426 427
gimp_transform_tool_button_press (GimpTool        *tool,
                                  GimpCoords      *coords,
                                  guint32          time,
                                  GdkModifierType  state,
428
                                  GimpDisplay     *gdisp)
Nate Summers's avatar
Nate Summers committed
429
{
430
  GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tool);
Nate Summers's avatar
Nate Summers committed
431

432 433
  if (tr_tool->function == TRANSFORM_CREATING && tr_tool->use_grid)
    gimp_transform_tool_oper_update (tool, coords, state, gdisp);
434

435 436
  tr_tool->lastx = tr_tool->startx = coords->x;
  tr_tool->lasty = tr_tool->starty = coords->y;
Nate Summers's avatar
Nate Summers committed
437

438
  gimp_tool_control_activate (tool->control);
Nate Summers's avatar
Nate Summers committed
439 440
}

441
static void
442 443 444
gimp_transform_tool_button_release (GimpTool        *tool,
                                    GimpCoords      *coords,
                                    guint32          time,
445 446
                                    GdkModifierType  state,
                                    GimpDisplay     *gdisp)
Nate Summers's avatar
Nate Summers committed
447
{
448
  GimpTransformTool *tr_tool = GIMP_TRANSFORM_TOOL (tool);
Nate Summers's avatar
Nate Summers committed
449
  gint               i;
Nate Summers's avatar
Nate Summers committed
450 451

  /*  if we are creating, there is nothing to be done...exit  */
452
  if (tr_tool->function == TRANSFORM_CREATING && tr_tool->use_grid)
Nate Summers's avatar
Nate Summers committed
453 454 455
    return;

  /*  if the 3rd button isn't pressed, transform the selected mask  */
456
  if (! (state & GDK_BUTTON3_MASK))
Nate Summers's avatar
Nate Summers committed
457 458
    {
      /* Shift-clicking is another way to approve the transform  */
459
      if ((state & GDK_SHIFT_MASK) || ! tr_tool->use_grid)
460 461 462
        {
          gimp_transform_tool_doit (tr_tool, gdisp);
        }
Nate Summers's avatar
Nate Summers committed
463 464 465
    }
  else
    {
466
      gimp_draw_tool_pause (GIMP_DRAW_TOOL (tool));
Nate Summers's avatar
Nate Summers committed
467

Michael Natterer's avatar
Michael Natterer committed
468 469 470
      /* get rid of preview artifacts left outside the drawable's area */
      gimp_transform_tool_expose_preview (tr_tool);

Nate Summers's avatar
Nate Summers committed
471 472
      /*  Restore the previous transformation info  */
      for (i = 0; i < TRAN_INFO_SIZE; i++)
473
        tr_tool->trans_info[i] = tr_tool->old_trans_info[i];
Nate Summers's avatar
Nate Summers committed
474

Michael Natterer's avatar
Michael Natterer committed
475 476 477
      /*  reget the selection bounds  */
      gimp_transform_tool_bounds (tr_tool, gdisp);

Nate Summers's avatar
Nate Summers committed
478
      /*  recalculate the tool's transformation matrix  */
Michael Natterer's avatar
Michael Natterer committed
479
      gimp_transform_tool_recalc (tr_tool, gdisp);
Nate Summers's avatar
Nate Summers committed
480

481
      gimp_draw_tool_resume (GIMP_DRAW_TOOL (tool));
Nate Summers's avatar
Nate Summers committed
482
    }
483 484

  gimp_tool_control_halt (tool->control);
Nate Summers's avatar
Nate Summers committed
485 486
}

487
static void
488 489 490
gimp_transform_tool_motion (GimpTool        *tool,
                            GimpCoords      *coords,
                            guint32          time,
491 492
                            GdkModifierType  state,
                            GimpDisplay     *gdisp)
Nate Summers's avatar
Nate Summers committed
493
{
494
  GimpTransformTool      *tr_tool = GIMP_TRANSFORM_TOOL (tool);
Michael Natterer's avatar
Michael Natterer committed
495
  GimpTransformToolClass *tr_tool_class;
Nate Summers's avatar
Nate Summers committed
496

497
  /*  if we are creating, there is nothing to be done so exit.  */
498
  if (tr_tool->function == TRANSFORM_CREATING || ! tr_tool->use_grid)
Nate Summers's avatar
Nate Summers committed
499 500
    return;

501
  gimp_draw_tool_pause (GIMP_DRAW_TOOL (tool));
Nate Summers's avatar
Nate Summers committed
502

Michael Natterer's avatar
Michael Natterer committed
503 504 505
  tr_tool->curx  = coords->x;
  tr_tool->cury  = coords->y;
  tr_tool->state = state;
Nate Summers's avatar
Nate Summers committed
506 507

  /*  recalculate the tool's transformation matrix  */
Michael Natterer's avatar
Michael Natterer committed
508 509 510 511 512
  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
513

514 515
      gimp_transform_tool_expose_preview (tr_tool);

Michael Natterer's avatar
Michael Natterer committed
516
      gimp_transform_tool_recalc (tr_tool, gdisp);
Michael Natterer's avatar
Michael Natterer committed
517 518 519 520
    }

  tr_tool->lastx = tr_tool->curx;
  tr_tool->lasty = tr_tool->cury;
Nate Summers's avatar
Nate Summers committed
521

522
  gimp_draw_tool_resume (GIMP_DRAW_TOOL (tool));
Nate Summers's avatar
Nate Summers committed
523 524
}

525 526
#define RESPONSE_RESET 1

527
static gboolean
528 529 530 531 532 533 534 535 536 537 538
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)
        {
539 540 541
        case GDK_KP_Enter:
        case GDK_Return:
          gimp_transform_tool_response (NULL, GTK_RESPONSE_OK, trans_tool);
542
          return TRUE;
543 544 545 546

        case GDK_Delete:
        case GDK_BackSpace:
          gimp_transform_tool_response (NULL, RESPONSE_RESET, trans_tool);
547
          return TRUE;
548 549
        }
    }
550 551

  return FALSE;
552 553
}

554 555 556 557 558 559 560
static void
gimp_transform_tool_modifier_key (GimpTool        *tool,
                                  GdkModifierType  key,
                                  gboolean         press,
                                  GdkModifierType  state,
                                  GimpDisplay     *gdisp)
{
561
  GimpTransformOptions *options;
562

563
  options = GIMP_TRANSFORM_OPTIONS (tool->tool_info->tool_options);
564

565
  if (key == GDK_CONTROL_MASK)
566
    {
567
      g_object_set (options,
568 569
                    "constrain-1", ! options->constrain_1,
                    NULL);
570
    }
571
  else if (key == GDK_MOD1_MASK)
572
    {
573
      g_object_set (options,
574 575
                    "constrain-2", ! options->constrain_2,
                    NULL);
576 577 578
    }
}

579 580 581 582 583 584
static void
gimp_transform_tool_oper_update (GimpTool        *tool,
                                 GimpCoords      *coords,
                                 GdkModifierType  state,
                                 GimpDisplay     *gdisp)
{
585 586
  GimpTransformTool *tr_tool   = GIMP_TRANSFORM_TOOL (tool);
  GimpDrawTool      *draw_tool = GIMP_DRAW_TOOL (tool);
587

588 589 590
  if (! tr_tool->use_grid)
    return;

591 592 593 594 595 596 597 598 599 600 601 602 603 604
  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)
605 606 607 608
        {
          closest_dist = dist;
          tr_tool->function = TRANSFORM_HANDLE_2;
        }
609 610 611 612 613

      dist = gimp_draw_tool_calc_distance (draw_tool, gdisp,
                                           coords->x, coords->y,
                                           tr_tool->tx3, tr_tool->ty3);
      if (dist < closest_dist)
614 615 616 617
        {
          closest_dist = dist;
          tr_tool->function = TRANSFORM_HANDLE_3;
        }
618 619 620 621 622

      dist = gimp_draw_tool_calc_distance (draw_tool, gdisp,
                                           coords->x, coords->y,
                                           tr_tool->tx4, tr_tool->ty4);
      if (dist < closest_dist)
623 624 625 626
        {
          closest_dist = dist;
          tr_tool->function = TRANSFORM_HANDLE_4;
        }
627 628 629 630 631

      if (gimp_draw_tool_on_handle (draw_tool, gdisp,
                                    coords->x, coords->y,
                                    GIMP_HANDLE_CIRCLE,
                                    tr_tool->tcx, tr_tool->tcy,
632
                                    HANDLE_SIZE, HANDLE_SIZE,
633 634
                                    GTK_ANCHOR_CENTER,
                                    FALSE))
635 636 637
        {
          tr_tool->function = TRANSFORM_HANDLE_CENTER;
        }
638 639 640
    }
}

641
static void
642 643
gimp_transform_tool_cursor_update (GimpTool        *tool,
                                   GimpCoords      *coords,
644 645
                                   GdkModifierType  state,
                                   GimpDisplay     *gdisp)
Nate Summers's avatar
Nate Summers committed
646
{
647
  GimpTransformTool    *tr_tool = GIMP_TRANSFORM_TOOL (tool);
648
  GimpTransformOptions *options;
649

650
  options = GIMP_TRANSFORM_OPTIONS (tool->tool_info->tool_options);
Nate Summers's avatar
Nate Summers committed
651

Michael Natterer's avatar
Michael Natterer committed
652
  if (tr_tool->use_grid)
Nate Summers's avatar
Nate Summers committed
653
    {
654
      GimpChannel        *selection = gimp_image_get_mask (gdisp->gimage);
655 656
      GimpCursorType      cursor    = GDK_TOP_LEFT_ARROW;
      GimpCursorModifier  modifier  = GIMP_CURSOR_MODIFIER_NONE;
657

658
      switch (options->type)
Michael Natterer's avatar
Michael Natterer committed
659
        {
660 661
        case GIMP_TRANSFORM_TYPE_LAYER:
          {
662
            GimpDrawable *drawable = gimp_image_active_drawable (gdisp->gimage);
663 664 665 666 667 668

            if (drawable)
              {
                if (GIMP_IS_LAYER (drawable) &&
                    gimp_layer_get_mask (GIMP_LAYER (drawable)))
                  {
669
                    cursor = GIMP_CURSOR_BAD;
670
                  }
Michael Natterer's avatar
Michael Natterer committed
671 672
                else if (gimp_image_coords_in_active_drawable (gdisp->gimage,
                                                               coords))
673
                  {
674 675
                    if (gimp_channel_is_empty (selection) ||
                        gimp_channel_value (selection, coords->x, coords->y))
676
                      {
677
                        cursor = GIMP_CURSOR_MOUSE;
678 679 680 681 682 683 684
                      }
                  }
              }
          }
          break;

        case GIMP_TRANSFORM_TYPE_SELECTION:
685 686
          if (gimp_channel_is_empty (selection) ||
              gimp_channel_value (selection, coords->x, coords->y))
Michael Natterer's avatar
Michael Natterer committed
687
            {
688
              cursor = GIMP_CURSOR_MOUSE;
Michael Natterer's avatar
Michael Natterer committed
689
            }
690 691 692 693
          break;

        case GIMP_TRANSFORM_TYPE_PATH:
          if (gimp_image_get_active_vectors (gdisp->gimage))
694
            cursor = GIMP_CURSOR_MOUSE;
695
          else
696
            cursor = GIMP_CURSOR_BAD;
697
          break;
Michael Natterer's avatar
Michael Natterer committed
698
        }
699

Michael Natterer's avatar
Michael Natterer committed
700 701
      if (tr_tool->use_center && tr_tool->function == TRANSFORM_HANDLE_CENTER)
        {
702
          modifier = GIMP_CURSOR_MODIFIER_MOVE;
Michael Natterer's avatar
Michael Natterer committed
703 704
        }

705 706
      gimp_tool_control_set_cursor          (tool->control, cursor);
      gimp_tool_control_set_cursor_modifier (tool->control, modifier);
Michael Natterer's avatar
Michael Natterer committed
707
    }
708 709

  GIMP_TOOL_CLASS (parent_class)->cursor_update (tool, coords, state, gdisp);
Nate Summers's avatar
Nate Summers committed
710 711
}

712
static void
713
gimp_transform_tool_draw (GimpDrawTool *draw_tool)
Nate Summers's avatar
Nate Summers committed
714
{
715 716
  GimpTool             *tool    = GIMP_TOOL (draw_tool);
  GimpTransformTool    *tr_tool = GIMP_TRANSFORM_TOOL (draw_tool);
717
  GimpTransformOptions *options;
718
  gdouble               z1, z2, z3, z4;
Nate Summers's avatar
Nate Summers committed
719

720 721 722
  if (! tr_tool->use_grid)
    return;

723
  options = GIMP_TRANSFORM_OPTIONS (tool->tool_info->tool_options);
724

Nate Summers's avatar
Nate Summers committed
725
  /*  draw the bounding box  */
726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741
  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
742

743 744
  /* We test if the transformed polygon is convex.
   * if z1 and z2 have the same sign as well as z3 and z4
745 746
   * the polygon is convex.
   */
747 748 749 750 751 752 753 754
  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));
755

756
  /*  Draw the grid (not for path transform since it looks ugly)  */
Nate Summers's avatar
Nate Summers committed
757

758 759 760
  if (tr_tool->type != GIMP_TRANSFORM_TYPE_PATH &&
      tr_tool->grid_coords                      &&
      tr_tool->tgrid_coords                     &&
761 762
      z1 * z2 > 0                               &&
      z3 * z4 > 0)
Nate Summers's avatar
Nate Summers committed
763
    {
764 765
      gint gci, i, k;

Nate Summers's avatar
Nate Summers committed
766
      k = tr_tool->ngx + tr_tool->ngy;
767

768
      for (i = 0, gci = 0; i < k; i++, gci += 4)
769
        {
770 771 772 773 774 775
          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);
776
        }
Nate Summers's avatar
Nate Summers committed
777 778 779
    }

  /*  draw the tool handles  */
780 781 782
  gimp_draw_tool_draw_handle (draw_tool,
                              GIMP_HANDLE_SQUARE,
                              tr_tool->tx1, tr_tool->ty1,
783
                              HANDLE_SIZE, HANDLE_SIZE,
784 785 786 787 788
                              GTK_ANCHOR_CENTER,
                              FALSE);
  gimp_draw_tool_draw_handle (draw_tool,
                              GIMP_HANDLE_SQUARE,
                              tr_tool->tx2, tr_tool->ty2,
789
                              HANDLE_SIZE, HANDLE_SIZE,
790 791 792 793 794
                              GTK_ANCHOR_CENTER,
                              FALSE);
  gimp_draw_tool_draw_handle (draw_tool,
                              GIMP_HANDLE_SQUARE,
                              tr_tool->tx3, tr_tool->ty3,
795
                              HANDLE_SIZE, HANDLE_SIZE,
796 797 798 799 800
                              GTK_ANCHOR_CENTER,
                              FALSE);
  gimp_draw_tool_draw_handle (draw_tool,
                              GIMP_HANDLE_SQUARE,
                              tr_tool->tx4, tr_tool->ty4,
801
                              HANDLE_SIZE, HANDLE_SIZE,
802 803
                              GTK_ANCHOR_CENTER,
                              FALSE);
Nate Summers's avatar
Nate Summers committed
804 805

  /*  draw the center  */
806 807 808 809 810
  if (tr_tool->use_center)
    {
      gimp_draw_tool_draw_handle (draw_tool,
                                  GIMP_HANDLE_FILLED_CIRCLE,
                                  tr_tool->tcx, tr_tool->tcy,
811
                                  HANDLE_SIZE, HANDLE_SIZE,
812 813 814
                                  GTK_ANCHOR_CENTER,
                                  FALSE);
    }
Nate Summers's avatar
Nate Summers committed
815

816
  if (tr_tool->type == GIMP_TRANSFORM_TYPE_PATH)
Nate Summers's avatar
Nate Summers committed
817
    {