src/lpe-tool-context.cpp

   1 /*
   2  * LPEToolContext: a context for a generic tool composed of subtools that are given by LPEs
   3  *
   4  * Authors:
   5  *   Maximilian Albert <maximilian.albert@gmail.com>
   6  *   Lauris Kaplinski <lauris@kaplinski.com>
   7  *
   8  * Copyright (C) 1998 The Free Software Foundation
   9  * Copyright (C) 1999-2005 authors
  10  * Copyright (C) 2001-2002 Ximian, Inc.
  11  * Copyright (C) 2008 Maximilian Albert
  12  *
  13  * Released under GNU GPL, read the file 'COPYING' for more information
  14  */
  15
  16 #include "config.h"
  17
  18 #include "forward.h"
  19 #include "pixmaps/cursor-node.xpm"
  20 #include "pixmaps/cursor-crosshairs.xpm"
  21 #include <gtk/gtk.h>
  22 #include "desktop.h"
  23 #include "message-context.h"
  24 #include "prefs-utils.h"
  25 #include "shape-editor.h"
  26 #include "selection.h"
  27 #include "desktop-handles.h"
  28
  29 /**
  30
  31 #include <gdk/gdkkeysyms.h>
  32 #include <glibmm/i18n.h>
  33 #include <string>
  34 #include <cstring>
  35 #include <numeric>
  36
  37 #include "svg/svg.h"
  38 #include "display/canvas-bpath.h"
  39 #include "display/bezier-utils.h"
  40
  41 #include <glib/gmem.h>
  42 #include "macros.h"
  43 #include "document.h"
  44 #include "selection.h"
  45 #include "desktop-events.h"
  46 #include "desktop-handles.h"
  47 #include "desktop-affine.h"
  48 #include "desktop-style.h"
  49 #include "xml/repr.h"
  50 #include "context-fns.h"
  51 #include "sp-item.h"
  52 #include "inkscape.h"
  53 #include "color.h"
  54 #include "rubberband.h"
  55 #include "splivarot.h"
  56 #include "sp-item-group.h"
  57 #include "sp-shape.h"
  58 #include "sp-path.h"
  59 #include "sp-text.h"
  60 #include "display/canvas-bpath.h"
  61 #include "display/canvas-arena.h"
  62 #include "livarot/Shape.h"
  63 #include <2geom/isnan.h>
  64 #include <2geom/pathvector.h>
  65 **/
  66
  67 #include "lpe-tool-context.h"
  68
  69 static void sp_lpetool_context_class_init(SPLPEToolContextClass *klass);
  70 static void sp_lpetool_context_init(SPLPEToolContext *erc);
  71 static void sp_lpetool_context_dispose(GObject *object);
  72
  73 static void sp_lpetool_context_setup(SPEventContext *ec);
  74 static void sp_lpetool_context_set(SPEventContext *ec, gchar const *key, gchar const *val);
  75 static gint sp_lpetool_context_root_handler(SPEventContext *ec, GdkEvent *event);
  76
  77 void sp_lpetool_context_selection_changed(Inkscape::Selection *selection, gpointer data);
  78
  79 const int num_subtools = 4;
  80
  81 Inkscape::LivePathEffect::EffectType lpesubtools[] = {
  82     Inkscape::LivePathEffect::LINE_SEGMENT,
  83     Inkscape::LivePathEffect::ANGLE_BISECTOR,
  84     Inkscape::LivePathEffect::CIRCLE_3PTS,
  85     Inkscape::LivePathEffect::PERP_BISECTOR,
  86 };
  87
  88 static SPPenContextClass *lpetool_parent_class = 0;
  89
  90 GType sp_lpetool_context_get_type(void)
  91 {
  92     static GType type = 0;
  93     if (!type) {
  94         GTypeInfo info = {
  95             sizeof(SPLPEToolContextClass),
  96             0, // base_init
  97             0, // base_finalize
  98             (GClassInitFunc)sp_lpetool_context_class_init,
  99             0, // class_finalize
 100             0, // class_data
 101             sizeof(SPLPEToolContext),
 102             0, // n_preallocs
 103             (GInstanceInitFunc)sp_lpetool_context_init,
 104             0 // value_table
 105         };
 106         type = g_type_register_static(SP_TYPE_PEN_CONTEXT, "SPLPEToolContext", &info, static_cast<GTypeFlags>(0));
 107     }
 108     return type;
 109 }
 110
 111 static void
 112 sp_lpetool_context_class_init(SPLPEToolContextClass *klass)
 113 {
 114     GObjectClass *object_class = (GObjectClass *) klass;
 115     SPEventContextClass *event_context_class = (SPEventContextClass *) klass;
 116
 117     lpetool_parent_class = (SPPenContextClass*)g_type_class_peek_parent(klass);
 118
 119     object_class->dispose = sp_lpetool_context_dispose;
 120
 121     event_context_class->setup = sp_lpetool_context_setup;
 122     event_context_class->set = sp_lpetool_context_set;
 123     event_context_class->root_handler = sp_lpetool_context_root_handler;
 124 }
 125
 126 static void
 127 sp_lpetool_context_init(SPLPEToolContext *lc)
 128 {
 129     lc->cursor_shape = cursor_crosshairs_xpm;
 130     lc->hot_x = 7;
 131     lc->hot_y = 7;
 132
 133     new (&lc->sel_changed_connection) sigc::connection();
 134
 135     //lc->tool_state = LPETOOL_STATE_NODE;
 136 }
 137
 138 static void
 139 sp_lpetool_context_dispose(GObject *object)
 140 {
 141     SPLPEToolContext *lc = SP_LPETOOL_CONTEXT(object);
 142     delete lc->shape_editor;
 143
 144     lc->sel_changed_connection.disconnect();
 145     lc->sel_changed_connection.~connection();
 146
 147     G_OBJECT_CLASS(lpetool_parent_class)->dispose(object);
 148 }
 149
 150 static void
 151 sp_lpetool_context_setup(SPEventContext *ec)
 152 {
 153     SPLPEToolContext *lc = SP_LPETOOL_CONTEXT(ec);
 154
 155     if (((SPEventContextClass *) lpetool_parent_class)->setup)
 156         ((SPEventContextClass *) lpetool_parent_class)->setup(ec);
 157
 158     Inkscape::Selection *selection = sp_desktop_selection (ec->desktop);
 159     SPItem *item = selection->singleItem();
 160
 161     lc->sel_changed_connection.disconnect();
 162     lc->sel_changed_connection =
 163         selection->connectChanged(sigc::bind(sigc::ptr_fun(&sp_lpetool_context_selection_changed), (gpointer)lc));
 164
 165     //lc->my_nc = new NodeContextCpp(lc->desktop, lc->prefs_repr, lc->key);
 166     lc->shape_editor = new ShapeEditor(ec->desktop);
 167
 168 // TODO temp force:
 169     ec->enableSelectionCue();
 170
 171     if (item) {
 172         lc->shape_editor->set_item(item, SH_NODEPATH);
 173         lc->shape_editor->set_item(item, SH_KNOTHOLDER);
 174     }
 175
 176     if (prefs_get_int_attribute("tools.lpetool", "selcue", 0) != 0) {
 177         ec->enableSelectionCue();
 178     }
 179
 180     lc->_message_context = new Inkscape::MessageContext((ec->desktop)->messageStack());
 181
 182     lc->shape_editor->update_statusbar();
 183 }
 184
 185 /**
 186 \brief  Callback that processes the "changed" signal on the selection;
 187 destroys old and creates new nodepath and reassigns listeners to the new selected item's repr
 188 */
 189 void
 190 sp_lpetool_context_selection_changed(Inkscape::Selection *selection, gpointer data)
 191 {
 192     SPLPEToolContext *lc = SP_LPETOOL_CONTEXT(data);
 193
 194     // TODO: update ShapeEditorsCollective instead
 195     lc->shape_editor->unset_item(SH_NODEPATH);
 196     lc->shape_editor->unset_item(SH_KNOTHOLDER);
 197     SPItem *item = selection->singleItem();
 198     lc->shape_editor->set_item(item, SH_NODEPATH);
 199     lc->shape_editor->set_item(item, SH_KNOTHOLDER);
 200     lc->shape_editor->update_statusbar();
 201 }
 202
 203 static void
 204 sp_lpetool_context_set(SPEventContext *ec, gchar const *key, gchar const *val)
 205 {
 206     // FIXME: how to set this correcly? the value from preferences-skeleton.h doesn't seem to get
 207     // read (it wants to set drag = 1)
 208     lpetool_parent_class->set(ec, key, "drag");
 209
 210     /**
 211     //pass on up to parent class to handle common attributes.
 212     if ( lpetool_parent_class->set ) {
 213         lpetool_parent_class->set(ec, key, val);
 214     }
 215     **/
 216 }
 217
 218 /**
 219 void
 220 sp_erc_update_toolbox (SPDesktop *desktop, const gchar *id, double value)
 221 {
 222     desktop->setToolboxAdjustmentValue (id, value);
 223 }
 224 **/
 225
 226 gint
 227 sp_lpetool_context_root_handler(SPEventContext *event_context, GdkEvent *event)
 228 {
 229     //g_print ("sp_lpetool_context_root_handler()\n");
 230     SPLPEToolContext *lc = SP_LPETOOL_CONTEXT(event_context);
 231     SPDesktop *desktop = event_context->desktop;
 232     Inkscape::Selection *selection = sp_desktop_selection (desktop);
 233
 234     //gint ret = FALSE;
 235     bool ret = false;
 236
 237     if (sp_pen_context_has_waiting_LPE(lc)) {
 238         // quit when we are waiting for a LPE to be applied
 239         g_print ("LPETool has waiting LPE. We call the pen tool parent context and return\n");
 240         ret = ((SPEventContextClass *) lpetool_parent_class)->root_handler(event_context, event);
 241         return ret;
 242     }
 243
 244     switch (event->type) {
 245         case GDK_BUTTON_PRESS:
 246             g_print ("GDK_BUTTON_PRESS\n");
 247             if (event->button.button == 1 && !event_context->space_panning) {
 248                 g_print ("   ... (passed if construct)\n");
 249                 // save drag origin
 250                 event_context->xp = (gint) event->button.x;
 251                 event_context->yp = (gint) event->button.y;
 252                 event_context->within_tolerance = true;
 253                 lc->shape_editor->cancel_hit();
 254
 255                 using namespace Inkscape::LivePathEffect;
 256
 257                 int mode = prefs_get_int_attribute("tools.lpetool", "mode", 0);
 258                 EffectType type = lpesubtools[mode];
 259                 g_print ("Activating mode %d\n", mode);
 260
 261                 // save drag origin
 262                 bool over_stroke = lc->shape_editor->is_over_stroke(NR::Point(event->button.x, event->button.y), true);
 263                 g_print ("over_stroke: %s\n", over_stroke ? "true" : "false");
 264
 265                 sp_pen_context_wait_for_LPE_mouse_clicks(lc, type, Effect::acceptsNumClicks(type));
 266
 267                 // we pass the mouse click on to pen tool as the first click which it should collect
 268                 ret = ((SPEventContextClass *) lpetool_parent_class)->root_handler(event_context, event);
 269
 270                 /**
 271                 SPDesktop *desktop = SP_EVENT_CONTEXT_DESKTOP(dc);
 272
 273                 NR::Point const button_w(event->button.x,
 274                                          event->button.y);
 275                 NR::Point const button_dt(desktop->w2d(button_w));
 276
 277                 if (Inkscape::have_viable_layer(desktop, dc->_message_context) == false) {
 278                     return TRUE;
 279                 }
 280
 281                 sp_lpetool_reset(dc, button_dt);
 282                 sp_lpetool_extinput(dc, event);
 283                 sp_lpetool_apply(dc, button_dt);
 284                 dc->accumulated->reset();
 285                 if (dc->repr) {
 286                     dc->repr = NULL;
 287                 }
 288
 289                 Inkscape::Rubberband::get()->start(desktop, button_dt);
 290                 Inkscape::Rubberband::get()->setMode(RUBBERBAND_MODE_TOUCHPATH);
 291
 292                 // initialize first point
 293                 dc->npoints = 0;
 294
 295                 sp_canvas_item_grab(SP_CANVAS_ITEM(desktop->acetate),
 296                                     ( GDK_KEY_PRESS_MASK |
 297                                       GDK_BUTTON_RELEASE_MASK |
 298                                       GDK_POINTER_MOTION_MASK |
 299                                       GDK_BUTTON_PRESS_MASK ),
 300                                     NULL,
 301                                     event->button.time);
 302
 303                 ret = TRUE;
 304
 305                 sp_canvas_force_full_redraw_after_interruptions(desktop->canvas, 3);
 306                 dc->is_drawing = true;
 307                 **/
 308             }
 309             break;
 310         case GDK_MOTION_NOTIFY:
 311         {
 312             if (!lc->shape_editor->has_nodepath() || selection->singleItem() == NULL) {
 313                 break;
 314             }
 315
 316             bool over_stroke = false;
 317             over_stroke = lc->shape_editor->is_over_stroke(NR::Point(event->motion.x, event->motion.y), false);
 318
 319             if (over_stroke) {
 320                 event_context->cursor_shape = cursor_node_xpm;
 321                 event_context->hot_x = 1;
 322                 event_context->hot_y = 1;
 323                 sp_event_context_update_cursor(event_context);
 324             } else {
 325                 lc->cursor_shape = cursor_crosshairs_xpm;
 326                 lc->hot_x = 7;
 327                 lc->hot_y = 7;
 328                 sp_event_context_update_cursor(event_context);
 329             }
 330         /**
 331         {
 332             NR::Point const motion_w(event->motion.x,
 333                                      event->motion.y);
 334             NR::Point motion_dt(desktop->w2d(motion_w));
 335             sp_lpetool_extinput(dc, event);
 336
 337             dc->_message_context->clear();
 338
 339             if ( dc->is_drawing && (event->motion.state & GDK_BUTTON1_MASK) && !event_context->space_panning) {
 340                 dc->dragging = TRUE;
 341
 342                 dc->_message_context->set(Inkscape::NORMAL_MESSAGE, _("<b>Drawing</b> an lpetool stroke"));
 343
 344                 if (!sp_lpetool_apply(dc, motion_dt)) {
 345                     ret = TRUE;
 346                     break;
 347                 }
 348
 349                 if ( dc->cur != dc->last ) {
 350                     sp_lpetool_brush(dc);
 351                     g_assert( dc->npoints > 0 );
 352                     fit_and_split(dc, FALSE);
 353                 }
 354                 ret = TRUE;
 355             }
 356             Inkscape::Rubberband::get()->move(motion_dt);
 357         }
 358         **/
 359         }
 360         break;
 361
 362
 363     case GDK_BUTTON_RELEASE:
 364     /**
 365     {
 366         NR::Point const motion_w(event->button.x, event->button.y);
 367         NR::Point const motion_dt(desktop->w2d(motion_w));
 368
 369         sp_canvas_item_ungrab(SP_CANVAS_ITEM(desktop->acetate), event->button.time);
 370         sp_canvas_end_forced_full_redraws(desktop->canvas);
 371         dc->is_drawing = false;
 372
 373         if (dc->dragging && event->button.button == 1 && !event_context->space_panning) {
 374             dc->dragging = FALSE;
 375
 376             NR::Maybe<NR::Rect> const b = Inkscape::Rubberband::get()->getRectangle();
 377
 378             sp_lpetool_apply(dc, motion_dt);
 379
 380             // Remove all temporary line segments
 381             while (dc->segments) {
 382                 gtk_object_destroy(GTK_OBJECT(dc->segments->data));
 383                 dc->segments = g_slist_remove(dc->segments, dc->segments->data);
 384             }
 385
 386             // Create object
 387             fit_and_split(dc, TRUE);
 388             accumulate_lpetool(dc);
 389             set_to_accumulated(dc); // performs document_done
 390
 391             // reset accumulated curve
 392             dc->accumulated->reset();
 393
 394             clear_current(dc);
 395             if (dc->repr) {
 396                 dc->repr = NULL;
 397             }
 398
 399             Inkscape::Rubberband::get()->stop();
 400             dc->_message_context->clear();
 401             ret = TRUE;
 402         }
 403         break;
 404     }
 405     **/
 406
 407     case GDK_KEY_PRESS:
 408         /**
 409         switch (get_group0_keyval (&event->key)) {
 410         case GDK_Up:
 411         case GDK_KP_Up:
 412             if (!MOD__CTRL_ONLY) {
 413                 dc->angle += 5.0;
 414                 if (dc->angle > 90.0)
 415                     dc->angle = 90.0;
 416                 sp_erc_update_toolbox (desktop, "lpetool-angle", dc->angle);
 417                 ret = TRUE;
 418             }
 419             break;
 420         case GDK_Down:
 421         case GDK_KP_Down:
 422             if (!MOD__CTRL_ONLY) {
 423                 dc->angle -= 5.0;
 424                 if (dc->angle < -90.0)
 425                     dc->angle = -90.0;
 426                 sp_erc_update_toolbox (desktop, "lpetool-angle", dc->angle);
 427                 ret = TRUE;
 428             }
 429             break;
 430         case GDK_Right:
 431         case GDK_KP_Right:
 432             if (!MOD__CTRL_ONLY) {
 433                 dc->width += 0.01;
 434                 if (dc->width > 1.0)
 435                     dc->width = 1.0;
 436                 sp_erc_update_toolbox (desktop, "altx-lpetool", dc->width * 100); // the same spinbutton is for alt+x
 437                 ret = TRUE;
 438             }
 439             break;
 440         case GDK_Left:
 441         case GDK_KP_Left:
 442             if (!MOD__CTRL_ONLY) {
 443                 dc->width -= 0.01;
 444                 if (dc->width < 0.01)
 445                     dc->width = 0.01;
 446                 sp_erc_update_toolbox (desktop, "altx-lpetool", dc->width * 100);
 447                 ret = TRUE;
 448             }
 449             break;
 450         case GDK_Home:
 451         case GDK_KP_Home:
 452             dc->width = 0.01;
 453             sp_erc_update_toolbox (desktop, "altx-lpetool", dc->width * 100);
 454             ret = TRUE;
 455             break;
 456         case GDK_End:
 457         case GDK_KP_End:
 458             dc->width = 1.0;
 459             sp_erc_update_toolbox (desktop, "altx-lpetool", dc->width * 100);
 460             ret = TRUE;
 461             break;
 462         case GDK_x:
 463         case GDK_X:
 464             if (MOD__ALT_ONLY) {
 465                 desktop->setToolboxFocusTo ("altx-lpetool");
 466                 ret = TRUE;
 467             }
 468             break;
 469         case GDK_Escape:
 470             Inkscape::Rubberband::get()->stop();
 471             if (dc->is_drawing) {
 472                 // if drawing, cancel, otherwise pass it up for deselecting
 473                 lpetool_cancel (dc);
 474                 ret = TRUE;
 475             }
 476             break;
 477         case GDK_z:
 478         case GDK_Z:
 479             if (MOD__CTRL_ONLY && dc->is_drawing) {
 480                 // if drawing, cancel, otherwise pass it up for undo
 481                 lpetool_cancel (dc);
 482                 ret = TRUE;
 483             }
 484             break;
 485         default:
 486             break;
 487         }
 488         **/
 489         break;
 490
 491     case GDK_KEY_RELEASE:
 492         /**
 493         switch (get_group0_keyval(&event->key)) {
 494             case GDK_Control_L:
 495             case GDK_Control_R:
 496                 dc->_message_context->clear();
 497                 break;
 498             default:
 499                 break;
 500         }
 501         **/
 502
 503     default:
 504         break;
 505     }
 506
 507     if (!ret) {
 508         if (((SPEventContextClass *) lpetool_parent_class)->root_handler) {
 509             ret = ((SPEventContextClass *) lpetool_parent_class)->root_handler(event_context, event);
 510         }
 511     }
 512
 513     return ret;
 514 }
 515
 516 /*
 517   Local Variables:
 518   mode:c++
 519   c-file-style:"stroustrup"
 520   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 521   indent-tabs-mode:nil
 522   fill-column:99
 523   End:
 524 */
 525 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :