src/desktop-events.cpp

   1 /** @file
   2  * @brief Event handlers for SPDesktop
   3  */
   4 /* Author:
   5  *   Lauris Kaplinski <lauris@kaplinski.com>
   6  *
   7  * Copyright (C) 1999-2002 Lauris Kaplinski
   8  *
   9  * Released under GNU GPL, read the file 'COPYING' for more information
  10  */
  11
  12 #ifdef HAVE_CONFIG_H
  13 # include <config.h>
  14 #endif
  15 #include <map>
  16 #include <string>
  17 #include <2geom/line.h>
  18 #include <glibmm/i18n.h>
  19
  20 #include "desktop.h"
  21 #include "desktop-handles.h"
  22 #include "dialogs/dialog-events.h"
  23 #include "display/canvas-axonomgrid.h"
  24 #include "display/canvas-grid.h"
  25 #include "display/guideline.h"
  26 #include "display/snap-indicator.h"
  27 #include "document.h"
  28 #include "event-context.h"
  29 #include "helper/action.h"
  30 #include "helper/unit-menu.h"
  31 #include "helper/units.h"
  32 #include "message-context.h"
  33 #include "preferences.h"
  34 #include "snap.h"
  35 #include "sp-guide.h"
  36 #include "sp-metrics.h"
  37 #include "sp-namedview.h"
  38 #include "tools-switch.h"
  39 #include "ui/dialog/guides.h"
  40 #include "widgets/desktop-widget.h"
  41 #include "xml/repr.h"
  42
  43 static void snoop_extended(GdkEvent* event, SPDesktop *desktop);
  44 static void init_extended();
  45
  46 /* Root item handler */
  47
  48 int sp_desktop_root_handler(SPCanvasItem */*item*/, GdkEvent *event, SPDesktop *desktop)
  49 {
  50     static bool watch = false;
  51     static bool first = true;
  52
  53     if ( first ) {
  54         Inkscape::Preferences *prefs = Inkscape::Preferences::get();
  55         if ( prefs->getBool("/options/useextinput/value", true)
  56             && prefs->getBool("/options/switchonextinput/value") ) {
  57             watch = true;
  58             init_extended();
  59         }
  60         first = false;
  61     }
  62     if ( watch ) {
  63         snoop_extended(event, desktop);
  64     }
  65
  66     return sp_event_context_root_handler(desktop->event_context, event);
  67 }
  68
  69 static gint sp_dt_ruler_event(GtkWidget *widget, GdkEvent *event, SPDesktopWidget *dtw, bool horiz)
  70 {
  71     static bool dragging = false;
  72     static SPCanvasItem *guide = NULL;
  73     static Geom::Point normal;
  74     int wx, wy;
  75
  76     SPDesktop *desktop = dtw->desktop;
  77     Inkscape::XML::Node *repr = SP_OBJECT_REPR(desktop->namedview);
  78
  79     gdk_window_get_pointer(GTK_WIDGET(dtw->canvas)->window, &wx, &wy, NULL);
  80     Geom::Point const event_win(wx, wy);
  81
  82     gint width, height;
  83     gdk_window_get_geometry(GTK_WIDGET(dtw->canvas)->window, NULL /*x*/, NULL /*y*/, &width, &height, NULL/*depth*/);
  84
  85     switch (event->type) {
  86     case GDK_BUTTON_PRESS:
  87             if (event->button.button == 1) {
  88                 dragging = true;
  89
  90                 // FIXME: The snap delay mechanism won't work here, because it has been implemented for the event context. Dragging
  91                 // guides off the ruler will send event to the ruler and not to the context, which bypasses sp_event_context_snap_delay_handler
  92
  93                 Geom::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
  94                 Geom::Point const event_dt(desktop->w2d(event_w));
  95
  96                 // explicitly show guidelines; if I draw a guide, I want them on
  97                 sp_repr_set_boolean(repr, "showguides", TRUE);
  98                 sp_repr_set_boolean(repr, "inkscape:guide-bbox", TRUE);
  99
 100                 // calculate the normal of the guidelines when dragged from the edges of rulers.
 101                 Geom::Point normal_bl_to_tr(-1.,1.); //bottomleft to topright
 102                 Geom::Point normal_tr_to_bl(1.,1.); //topright to bottomleft
 103                 normal_bl_to_tr.normalize();
 104                 normal_tr_to_bl.normalize();
 105                 Inkscape::CanvasGrid * grid = sp_namedview_get_first_enabled_grid(desktop->namedview);
 106                 if ( grid && grid->getGridType() == Inkscape::GRID_AXONOMETRIC ) {
 107                     Inkscape::CanvasAxonomGrid *axonomgrid = dynamic_cast<Inkscape::CanvasAxonomGrid *>(grid);
 108                     if (event->button.state & GDK_CONTROL_MASK) {
 109                         // guidelines normal to gridlines
 110                         normal_bl_to_tr = Geom::Point::polar(-axonomgrid->angle_rad[0], 1.0);
 111                         normal_tr_to_bl = Geom::Point::polar(axonomgrid->angle_rad[2], 1.0);
 112                     } else {
 113                         normal_bl_to_tr = rot90(Geom::Point::polar(axonomgrid->angle_rad[2], 1.0));
 114                         normal_tr_to_bl = rot90(Geom::Point::polar(-axonomgrid->angle_rad[0], 1.0));
 115                     }
 116                 }
 117                 if (horiz) {
 118                     if (wx < 50) {
 119                         normal = normal_bl_to_tr;
 120                     } else if (wx > width - 50) {
 121                         normal = normal_tr_to_bl;
 122                     } else {
 123                         normal = Geom::Point(0.,1.);
 124                     }
 125                 } else {
 126                     if (wy < 50) {
 127                         normal = normal_bl_to_tr;
 128                     } else if (wy > height - 50) {
 129                         normal = normal_tr_to_bl;
 130                     } else {
 131                         normal = Geom::Point(1.,0.);
 132                     }
 133                 }
 134
 135                 guide = sp_guideline_new(desktop->guides, event_dt, normal);
 136                 sp_guideline_set_color(SP_GUIDELINE(guide), desktop->namedview->guidehicolor);
 137                 gdk_pointer_grab(widget->window, FALSE,
 138                                  (GdkEventMask)(GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK ),
 139                                  NULL, NULL,
 140                                  event->button.time);
 141             }
 142             break;
 143     case GDK_MOTION_NOTIFY:
 144             if (dragging) {
 145                 Geom::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
 146                 Geom::Point event_dt(desktop->w2d(event_w));
 147
 148                 SnapManager &m = desktop->namedview->snap_manager;
 149                 m.setup(desktop);
 150                 // We only have a temporary guide which is not stored in our document yet.
 151                 // Because the guide snapper only looks in the document for guides to snap to,
 152                 // we don't have to worry about a guide snapping to itself here
 153                 m.guideFreeSnap(event_dt, normal);
 154
 155                 sp_guideline_set_position(SP_GUIDELINE(guide), from_2geom(event_dt));
 156                 desktop->set_coordinate_status(to_2geom(event_dt));
 157                 desktop->setPosition(to_2geom(event_dt));
 158             }
 159             break;
 160     case GDK_BUTTON_RELEASE:
 161             if (dragging && event->button.button == 1) {
 162                 gdk_pointer_ungrab(event->button.time);
 163                 Geom::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
 164                 Geom::Point event_dt(desktop->w2d(event_w));
 165
 166                 SnapManager &m = desktop->namedview->snap_manager;
 167                 m.setup(desktop);
 168                 // We only have a temporary guide which is not stored in our document yet.
 169                 // Because the guide snapper only looks in the document for guides to snap to,
 170                 // we don't have to worry about a guide snapping to itself here
 171                 m.guideFreeSnap(event_dt, normal);
 172
 173                 dragging = false;
 174
 175                 sp_event_context_discard_delayed_snap_event(desktop->event_context);
 176
 177                 gtk_object_destroy(GTK_OBJECT(guide));
 178                 guide = NULL;
 179                 if ((horiz ? wy : wx) >= 0) {
 180                     Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
 181                     Inkscape::XML::Node *repr = xml_doc->createElement("sodipodi:guide");
 182                     sp_repr_set_point(repr, "orientation", normal);
 183                     sp_repr_set_point(repr, "position", from_2geom(event_dt));
 184                     SP_OBJECT_REPR(desktop->namedview)->appendChild(repr);
 185                     Inkscape::GC::release(repr);
 186                     sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 187                                      _("Create guide"));
 188                 }
 189                 desktop->set_coordinate_status(from_2geom(event_dt));
 190
 191                 // A dt_ruler_event might be emitted when dragging a guide of the rulers
 192                 // while drawing a Bezier curve. In such a situation, we're already in that
 193                 // specific context and the snap delay is already active. We should interfere
 194                 // with that context and we should therefore leave the snap delay status
 195                 // as it is. So although it might have been set to active above on
 196                 // GDK_BUTTON_PRESS, we should not set it back to inactive here. That must be
 197                 // done by the context.
 198             }
 199         default:
 200             break;
 201     }
 202
 203     return FALSE;
 204 }
 205
 206 int sp_dt_hruler_event(GtkWidget *widget, GdkEvent *event, SPDesktopWidget *dtw)
 207 {
 208     return sp_dt_ruler_event(widget, event, dtw, true);
 209 }
 210
 211 int sp_dt_vruler_event(GtkWidget *widget, GdkEvent *event, SPDesktopWidget *dtw)
 212 {
 213     return sp_dt_ruler_event(widget, event, dtw, false);
 214 }
 215
 216 /* Guides */
 217 enum SPGuideDragType {
 218     SP_DRAG_TRANSLATE,
 219     SP_DRAG_TRANSLATE_CONSTRAINED, // Is not being used currently!
 220     SP_DRAG_ROTATE,
 221     SP_DRAG_MOVE_ORIGIN,
 222     SP_DRAG_NONE
 223 };
 224
 225 static Geom::Point drag_origin;
 226 static SPGuideDragType drag_type = SP_DRAG_NONE;
 227 //static bool reset_drag_origin = false; // when Ctrl is pressed while dragging, this is used to trigger resetting of the
 228 //                                       // drag origin to that location so that constrained movement is more intuitive
 229
 230 // Min distance from anchor to initiate rotation, measured in screenpixels
 231 #define tol 40.0
 232
 233 gint sp_dt_guide_event(SPCanvasItem *item, GdkEvent *event, gpointer data)
 234 {
 235     static bool moved = false;
 236     gint ret = FALSE;
 237
 238     SPGuide *guide = SP_GUIDE(data);
 239     SPDesktop *desktop = static_cast<SPDesktop*>(gtk_object_get_data(GTK_OBJECT(item->canvas), "SPDesktop"));
 240
 241     switch (event->type) {
 242         case GDK_2BUTTON_PRESS:
 243             if (event->button.button == 1) {
 244                 drag_type = SP_DRAG_NONE;
 245                 sp_event_context_discard_delayed_snap_event(desktop->event_context);
 246                 sp_canvas_item_ungrab(item, event->button.time);
 247                 Inkscape::UI::Dialogs::GuidelinePropertiesDialog::showDialog(guide, desktop);
 248                 ret = TRUE;
 249             }
 250             break;
 251         case GDK_BUTTON_PRESS:
 252             if (event->button.button == 1) {
 253                 Geom::Point const event_w(event->button.x, event->button.y);
 254                 Geom::Point const event_dt(desktop->w2d(event_w));
 255
 256                 // Due to the tolerance allowed when grabbing a guide, event_dt will generally
 257                 // be close to the guide but not just exactly on it. The drag origin calculated
 258                 // here must be exactly on the guide line though, otherwise
 259                 // small errors will occur once we snap, see
 260                 // https://bugs.launchpad.net/inkscape/+bug/333762
 261                 drag_origin = Geom::projection(event_dt, Geom::Line(guide->point_on_line, guide->angle()));
 262
 263                 if (event->button.state & GDK_SHIFT_MASK) {
 264                     // with shift we rotate the guide
 265                     drag_type = SP_DRAG_ROTATE;
 266                 } else {
 267                     if (event->button.state & GDK_CONTROL_MASK) {
 268                         drag_type = SP_DRAG_MOVE_ORIGIN;
 269                     } else {
 270                         drag_type = SP_DRAG_TRANSLATE;
 271                     }
 272                 }
 273
 274                 if (drag_type == SP_DRAG_ROTATE || drag_type == SP_DRAG_TRANSLATE) {
 275                     sp_canvas_item_grab(item,
 276                                         ( GDK_BUTTON_RELEASE_MASK  |
 277                                           GDK_BUTTON_PRESS_MASK    |
 278                                           GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK ),
 279                                         NULL,
 280                                         event->button.time);
 281                 }
 282                 ret = TRUE;
 283             }
 284             break;
 285         case GDK_MOTION_NOTIFY:
 286             if (drag_type != SP_DRAG_NONE) {
 287                 Geom::Point const motion_w(event->motion.x,
 288                                            event->motion.y);
 289                 Geom::Point motion_dt(desktop->w2d(motion_w));
 290
 291                 // This is for snapping while dragging existing guidelines. New guidelines,
 292                 // which are dragged off the ruler, are being snapped in sp_dt_ruler_event
 293                 SnapManager &m = desktop->namedview->snap_manager;
 294                 m.setup(desktop, true, NULL, NULL, guide);
 295                 if (drag_type == SP_DRAG_MOVE_ORIGIN) {
 296                     // If we snap in guideConstrainedSnap() below, then motion_dt will
 297                     // be forced to be on the guide. If we don't snap however, then
 298                     // the origin should still be constrained to the guide. So let's do
 299                     // that explicitly first:
 300
 301                     Geom::Line line(guide->point_on_line, guide->angle());
 302                     Geom::Coord t = line.nearestPoint(motion_dt);
 303                     motion_dt = line.pointAt(t);
 304                     m.guideConstrainedSnap(motion_dt, *guide);
 305                 } else {
 306                     m.guideFreeSnap(motion_dt, guide->normal_to_line);
 307                 }
 308
 309                 switch (drag_type) {
 310                     case SP_DRAG_TRANSLATE:
 311                     {
 312                         sp_guide_moveto(*guide, motion_dt, false);
 313                         break;
 314                     }
 315                     case SP_DRAG_TRANSLATE_CONSTRAINED: // Is not being used currently!
 316                     {
 317                         Geom::Point pt_constr = Geom::constrain_angle(guide->point_on_line, motion_dt);
 318                         sp_guide_moveto(*guide, pt_constr, false);
 319                         break;
 320                     }
 321                     case SP_DRAG_ROTATE:
 322                     {
 323                         Geom::Point pt = motion_dt - guide->point_on_line;
 324                         double angle = std::atan2(pt[Geom::Y], pt[Geom::X]);
 325                         if  (event->motion.state & GDK_CONTROL_MASK) {
 326                             Inkscape::Preferences *prefs = Inkscape::Preferences::get();
 327                             unsigned const snaps = abs(prefs->getInt("/options/rotationsnapsperpi/value", 12));
 328                             if (snaps) {
 329                                 double sections = floor(angle * snaps / M_PI + .5);
 330                                 angle = (M_PI / snaps) * sections;
 331                             }
 332                         }
 333                         sp_guide_set_normal(*guide, Geom::Point(1,0) * Geom::Rotate(angle + M_PI_2), false);
 334                         break;
 335                     }
 336                     case SP_DRAG_MOVE_ORIGIN:
 337                     {
 338                         sp_guide_moveto(*guide, motion_dt, false);
 339                         break;
 340                     }
 341                     case SP_DRAG_NONE:
 342                         g_assert_not_reached();
 343                         break;
 344                 }
 345                 moved = true;
 346                 desktop->set_coordinate_status(from_2geom(motion_dt));
 347                 desktop->setPosition(from_2geom(motion_dt));
 348
 349                 ret = TRUE;
 350             }
 351             break;
 352     case GDK_BUTTON_RELEASE:
 353             if (drag_type != SP_DRAG_NONE && event->button.button == 1) {
 354                 if (moved) {
 355                     Geom::Point const event_w(event->button.x,
 356                                               event->button.y);
 357                     Geom::Point event_dt(desktop->w2d(event_w));
 358
 359                     SnapManager &m = desktop->namedview->snap_manager;
 360                     m.setup(desktop, true, NULL, NULL, guide);
 361                     if (drag_type == SP_DRAG_MOVE_ORIGIN) {
 362                         // If we snap in guideConstrainedSnap() below, then motion_dt will
 363                         // be forced to be on the guide. If we don't snap however, then
 364                         // the origin should still be constrained to the guide. So let's
 365                         // do that explicitly first:
 366                         Geom::Line line(guide->point_on_line, guide->angle());
 367                         Geom::Coord t = line.nearestPoint(event_dt);
 368                         event_dt = line.pointAt(t);
 369                         m.guideConstrainedSnap(event_dt, *guide);
 370                     } else {
 371                         m.guideFreeSnap(event_dt, guide->normal_to_line);
 372                     }
 373
 374                     if (sp_canvas_world_pt_inside_window(item->canvas, event_w)) {
 375                         switch (drag_type) {
 376                             case SP_DRAG_TRANSLATE:
 377                             {
 378                                 sp_guide_moveto(*guide, event_dt, true);
 379                                 break;
 380                             }
 381                             case SP_DRAG_TRANSLATE_CONSTRAINED: // Is not being used currently!
 382                             {
 383                                 Geom::Point pt_constr = Geom::constrain_angle(guide->point_on_line, event_dt);
 384                                 sp_guide_moveto(*guide, pt_constr, true);
 385                                 break;
 386                             }
 387                             case SP_DRAG_ROTATE:
 388                             {
 389                                 Geom::Point pt = event_dt - guide->point_on_line;
 390                                 double angle = std::atan2(pt[Geom::Y], pt[Geom::X]);
 391                                 if  (event->motion.state & GDK_CONTROL_MASK) {
 392                                     Inkscape::Preferences *prefs = Inkscape::Preferences::get();
 393                                     unsigned const snaps = abs(prefs->getInt("/options/rotationsnapsperpi/value", 12));
 394                                     if (snaps) {
 395                                         double sections = floor(angle * snaps / M_PI + .5);
 396                                         angle = (M_PI / snaps) * sections;
 397                                     }
 398                                 }
 399                                 sp_guide_set_normal(*guide, Geom::Point(1,0) * Geom::Rotate(angle + M_PI_2), true);
 400                                 break;
 401                             }
 402                             case SP_DRAG_MOVE_ORIGIN:
 403                             {
 404                                 sp_guide_moveto(*guide, event_dt, true);
 405                                 break;
 406                             }
 407                             case SP_DRAG_NONE:
 408                                 g_assert_not_reached();
 409                                 break;
 410                         }
 411                         sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 412                                          _("Move guide"));
 413                     } else {
 414                         /* Undo movement of any attached shapes. */
 415                         sp_guide_moveto(*guide, guide->point_on_line, false);
 416                         sp_guide_set_normal(*guide, guide->normal_to_line, false);
 417                         sp_guide_remove(guide);
 418                         sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 419                                      _("Delete guide"));
 420                     }
 421                     moved = false;
 422                     desktop->set_coordinate_status(from_2geom(event_dt));
 423                     desktop->setPosition (from_2geom(event_dt));
 424                 }
 425                 drag_type = SP_DRAG_NONE;
 426                 sp_event_context_discard_delayed_snap_event(desktop->event_context);
 427                 sp_canvas_item_ungrab(item, event->button.time);
 428                 ret=TRUE;
 429             }
 430     case GDK_ENTER_NOTIFY:
 431     {
 432             sp_guideline_set_color(SP_GUIDELINE(item), guide->hicolor);
 433
 434             // set move or rotate cursor
 435             Geom::Point const event_w(event->crossing.x, event->crossing.y);
 436             Geom::Point const event_dt(desktop->w2d(event_w));
 437
 438             if (event->crossing.state & GDK_SHIFT_MASK) {
 439                 GdkCursor *guide_cursor;
 440                 guide_cursor = gdk_cursor_new (GDK_EXCHANGE);
 441                 gdk_window_set_cursor(GTK_WIDGET(sp_desktop_canvas(desktop))->window, guide_cursor);
 442                 gdk_cursor_unref(guide_cursor);
 443             }
 444
 445             char *guide_description = sp_guide_description(guide);
 446             desktop->guidesMessageContext()->setF(Inkscape::NORMAL_MESSAGE, _("<b>Guideline</b>: %s"), guide_description);
 447             g_free(guide_description);
 448             break;
 449     }
 450     case GDK_LEAVE_NOTIFY:
 451             sp_guideline_set_color(SP_GUIDELINE(item), guide->color);
 452
 453             // restore event context's cursor
 454             gdk_window_set_cursor(GTK_WIDGET(sp_desktop_canvas(desktop))->window, desktop->event_context->cursor);
 455
 456             desktop->guidesMessageContext()->clear();
 457             break;
 458         case GDK_KEY_PRESS:
 459             switch (get_group0_keyval (&event->key)) {
 460                 case GDK_Delete:
 461                 case GDK_KP_Delete:
 462                 case GDK_BackSpace:
 463                 {
 464                     SPDocument *doc = SP_OBJECT_DOCUMENT(guide);
 465                     sp_guide_remove(guide);
 466                     sp_document_done(doc, SP_VERB_NONE, _("Delete guide"));
 467                     ret = TRUE;
 468                     break;
 469                 }
 470                 case GDK_Shift_L:
 471                 case GDK_Shift_R:
 472                     GdkCursor *guide_cursor;
 473                     guide_cursor = gdk_cursor_new (GDK_EXCHANGE);
 474                     gdk_window_set_cursor(GTK_WIDGET(sp_desktop_canvas(desktop))->window, guide_cursor);
 475                     gdk_cursor_unref(guide_cursor);
 476                     ret = TRUE;
 477                 default:
 478                     // do nothing;
 479                     break;
 480             }
 481             break;
 482         case GDK_KEY_RELEASE:
 483             switch (get_group0_keyval (&event->key)) {
 484                 case GDK_Shift_L:
 485                 case GDK_Shift_R:
 486                     GdkCursor *guide_cursor;
 487                     guide_cursor = gdk_cursor_new (GDK_EXCHANGE);
 488                     gdk_window_set_cursor(GTK_WIDGET(sp_desktop_canvas(desktop))->window, guide_cursor);
 489                     gdk_cursor_unref(guide_cursor);
 490                     break;
 491                 default:
 492                     // do nothing;
 493                     break;
 494             }
 495     default:
 496         break;
 497     }
 498
 499     return ret;
 500 }
 501
 502 //static std::map<GdkInputSource, std::string> switchMap;
 503 static std::map<std::string, int> toolToUse;
 504 static std::string lastName;
 505 static GdkInputSource lastType = GDK_SOURCE_MOUSE;
 506
 507 static void init_extended()
 508 {
 509     std::string avoidName = "pad";
 510     GList* devices = gdk_devices_list();
 511     if ( devices ) {
 512         for ( GList* curr = devices; curr; curr = g_list_next(curr) ) {
 513             GdkDevice* dev = reinterpret_cast<GdkDevice*>(curr->data);
 514             if ( dev->name
 515                  && (avoidName != dev->name)
 516                  && (dev->source != GDK_SOURCE_MOUSE) ) {
 517 //                 g_message("Adding '%s' as [%d]", dev->name, dev->source);
 518
 519                 // Set the initial tool for the device
 520                 switch ( dev->source ) {
 521                     case GDK_SOURCE_PEN:
 522                         toolToUse[dev->name] = TOOLS_CALLIGRAPHIC;
 523                         break;
 524                     case GDK_SOURCE_ERASER:
 525                         toolToUse[dev->name] = TOOLS_ERASER;
 526                         break;
 527                     case GDK_SOURCE_CURSOR:
 528                         toolToUse[dev->name] = TOOLS_SELECT;
 529                         break;
 530                     default:
 531                         ; // do not add
 532                 }
 533 //            } else if (dev->name) {
 534 //                 g_message("Skippn '%s' as [%s]", dev->name, dev->source);
 535             }
 536         }
 537     }
 538 }
 539
 540
 541 void snoop_extended(GdkEvent* event, SPDesktop *desktop)
 542 {
 543     GdkInputSource source = GDK_SOURCE_MOUSE;
 544     std::string name;
 545
 546     switch ( event->type ) {
 547         case GDK_MOTION_NOTIFY:
 548         {
 549             GdkEventMotion* event2 = reinterpret_cast<GdkEventMotion*>(event);
 550             if ( event2->device ) {
 551                 source = event2->device->source;
 552                 name = event2->device->name;
 553             }
 554         }
 555         break;
 556
 557         case GDK_BUTTON_PRESS:
 558         case GDK_2BUTTON_PRESS:
 559         case GDK_3BUTTON_PRESS:
 560         case GDK_BUTTON_RELEASE:
 561         {
 562             GdkEventButton* event2 = reinterpret_cast<GdkEventButton*>(event);
 563             if ( event2->device ) {
 564                 source = event2->device->source;
 565                 name = event2->device->name;
 566             }
 567         }
 568         break;
 569
 570         case GDK_SCROLL:
 571         {
 572             GdkEventScroll* event2 = reinterpret_cast<GdkEventScroll*>(event);
 573             if ( event2->device ) {
 574                 source = event2->device->source;
 575                 name = event2->device->name;
 576             }
 577         }
 578         break;
 579
 580         case GDK_PROXIMITY_IN:
 581         case GDK_PROXIMITY_OUT:
 582         {
 583             GdkEventProximity* event2 = reinterpret_cast<GdkEventProximity*>(event);
 584             if ( event2->device ) {
 585                 source = event2->device->source;
 586                 name = event2->device->name;
 587             }
 588         }
 589         break;
 590
 591         default:
 592             ;
 593     }
 594
 595     if (!name.empty()) {
 596         if ( lastType != source || lastName != name ) {
 597             // The device switched. See if it is one we 'count'
 598             //g_message("Changed device %s -> %s", lastName.c_str(), name.c_str());
 599             std::map<std::string, int>::iterator it = toolToUse.find(lastName);
 600             if (it != toolToUse.end()) {
 601                 // Save the tool currently selected for next time the input
 602                 // device shows up.
 603                 it->second = tools_active(desktop);
 604             }
 605
 606             it = toolToUse.find(name);
 607             if (it != toolToUse.end() ) {
 608                 tools_switch(desktop, it->second);
 609             }
 610
 611             lastName = name;
 612             lastType = source;
 613         }
 614     }
 615 }
 616
 617
 618
 619 /*
 620   Local Variables:
 621   mode:c++
 622   c-file-style:"stroustrup"
 623   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 624   indent-tabs-mode:nil
 625   fill-column:99
 626   End:
 627 */
 628 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :
 629