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     static bool snap_window_temporarily_open = false;
  75     int wx, wy;
  76
  77     SPDesktop *desktop = dtw->desktop;
  78     Inkscape::XML::Node *repr = SP_OBJECT_REPR(desktop->namedview);
  79
  80     gdk_window_get_pointer(GTK_WIDGET(dtw->canvas)->window, &wx, &wy, NULL);
  81     Geom::Point const event_win(wx, wy);
  82
  83     gint width, height;
  84     gdk_window_get_geometry(GTK_WIDGET(dtw->canvas)->window, NULL /*x*/, NULL /*y*/, &width, &height, NULL/*depth*/);
  85
  86     switch (event->type) {
  87     case GDK_BUTTON_PRESS:
  88             if (event->button.button == 1) {
  89                 dragging = true;
  90
  91                 // FIXME: The snap delay mechanism won't work here, because it has been implemented
  92                 // for the event context. Dragging guides off the ruler will send event to the ruler
  93                 // and not to the context, which bypasses sp_event_context_snap_delay_handler
  94                 // The snap manager will not notice the difference, so it'll check if the snap delay
  95                 // has been activated (This check is only needed for catching coding errors, i.e.
  96                 // to warn if the snap window has not been implemented properly in some context)
  97                 if (desktop->event_context->_snap_window_open == false) {
  98                     // A dt_ruler_event might be emitted when dragging a guide off the rulers
  99                     // while drawing a Bezier curve. In such a situation, we're already in that
 100                     // specific context and the snap delay is already active. We should not set
 101                     // the snap delay to active again, because that will trigger a similar warning
 102                     // to the one above
 103                     sp_event_context_snap_window_open(desktop->event_context);
 104                     snap_window_temporarily_open = true;
 105                 }
 106
 107                 Geom::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
 108                 Geom::Point const event_dt(desktop->w2d(event_w));
 109
 110                 // explicitly show guidelines; if I draw a guide, I want them on
 111                 sp_repr_set_boolean(repr, "showguides", TRUE);
 112                 sp_repr_set_boolean(repr, "inkscape:guide-bbox", TRUE);
 113
 114                 // calculate the normal of the guidelines when dragged from the edges of rulers.
 115                 Geom::Point normal_bl_to_tr(-1.,1.); //bottomleft to topright
 116                 Geom::Point normal_tr_to_bl(1.,1.); //topright to bottomleft
 117                 normal_bl_to_tr.normalize();
 118                 normal_tr_to_bl.normalize();
 119                 Inkscape::CanvasGrid * grid = sp_namedview_get_first_enabled_grid(desktop->namedview);
 120                 if ( grid && grid->getGridType() == Inkscape::GRID_AXONOMETRIC ) {
 121                     Inkscape::CanvasAxonomGrid *axonomgrid = dynamic_cast<Inkscape::CanvasAxonomGrid *>(grid);
 122                     if (event->button.state & GDK_CONTROL_MASK) {
 123                         // guidelines normal to gridlines
 124                         normal_bl_to_tr = Geom::Point::polar(-axonomgrid->angle_rad[0], 1.0);
 125                         normal_tr_to_bl = Geom::Point::polar(axonomgrid->angle_rad[2], 1.0);
 126                     } else {
 127                         normal_bl_to_tr = rot90(Geom::Point::polar(axonomgrid->angle_rad[2], 1.0));
 128                         normal_tr_to_bl = rot90(Geom::Point::polar(-axonomgrid->angle_rad[0], 1.0));
 129                     }
 130                 }
 131                 if (horiz) {
 132                     if (wx < 50) {
 133                         normal = normal_bl_to_tr;
 134                     } else if (wx > width - 50) {
 135                         normal = normal_tr_to_bl;
 136                     } else {
 137                         normal = Geom::Point(0.,1.);
 138                     }
 139                 } else {
 140                     if (wy < 50) {
 141                         normal = normal_bl_to_tr;
 142                     } else if (wy > height - 50) {
 143                         normal = normal_tr_to_bl;
 144                     } else {
 145                         normal = Geom::Point(1.,0.);
 146                     }
 147                 }
 148
 149                 guide = sp_guideline_new(desktop->guides, event_dt, normal);
 150                 sp_guideline_set_color(SP_GUIDELINE(guide), desktop->namedview->guidehicolor);
 151                 gdk_pointer_grab(widget->window, FALSE,
 152                                  (GdkEventMask)(GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK ),
 153                                  NULL, NULL,
 154                                  event->button.time);
 155             }
 156             break;
 157     case GDK_MOTION_NOTIFY:
 158             if (dragging) {
 159                 Geom::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
 160                 Geom::Point event_dt(desktop->w2d(event_w));
 161
 162                 SnapManager &m = desktop->namedview->snap_manager;
 163                 m.setup(desktop);
 164                 // We only have a temporary guide which is not stored in our document yet.
 165                 // Because the guide snapper only looks in the document for guides to snap to,
 166                 // we don't have to worry about a guide snapping to itself here
 167                 m.guideFreeSnap(event_dt, normal);
 168
 169                 sp_guideline_set_position(SP_GUIDELINE(guide), from_2geom(event_dt));
 170                 desktop->set_coordinate_status(to_2geom(event_dt));
 171                 desktop->setPosition(to_2geom(event_dt));
 172             }
 173             break;
 174     case GDK_BUTTON_RELEASE:
 175             if (dragging && event->button.button == 1) {
 176                 gdk_pointer_ungrab(event->button.time);
 177                 Geom::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
 178                 Geom::Point event_dt(desktop->w2d(event_w));
 179
 180                 SnapManager &m = desktop->namedview->snap_manager;
 181                 m.setup(desktop);
 182                 // We only have a temporary guide which is not stored in our document yet.
 183                 // Because the guide snapper only looks in the document for guides to snap to,
 184                 // we don't have to worry about a guide snapping to itself here
 185                 m.guideFreeSnap(event_dt, normal);
 186
 187                 dragging = false;
 188
 189                 // See the comments in GDK_BUTTON_PRESS
 190                 if (snap_window_temporarily_open) {
 191                         sp_event_context_snap_window_closed(desktop->event_context);
 192                         snap_window_temporarily_open = false;
 193                 }
 194
 195                 gtk_object_destroy(GTK_OBJECT(guide));
 196                 guide = NULL;
 197                 if ((horiz ? wy : wx) >= 0) {
 198                     Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
 199                     Inkscape::XML::Node *repr = xml_doc->createElement("sodipodi:guide");
 200                     sp_repr_set_point(repr, "orientation", normal);
 201                     sp_repr_set_point(repr, "position", from_2geom(event_dt));
 202                     SP_OBJECT_REPR(desktop->namedview)->appendChild(repr);
 203                     Inkscape::GC::release(repr);
 204                     sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 205                                      _("Create guide"));
 206                 }
 207                 desktop->set_coordinate_status(from_2geom(event_dt));
 208
 209                 // A dt_ruler_event might be emitted when dragging a guide of the rulers
 210                 // while drawing a Bezier curve. In such a situation, we're already in that
 211                 // specific context and the snap delay is already active. We should interfere
 212                 // with that context and we should therefore leave the snap delay status
 213                 // as it is. So although it might have been set to active above on
 214                 // GDK_BUTTON_PRESS, we should not set it back to inactive here. That must be
 215                 // done by the context.
 216             }
 217         default:
 218             break;
 219     }
 220
 221     return FALSE;
 222 }
 223
 224 int sp_dt_hruler_event(GtkWidget *widget, GdkEvent *event, SPDesktopWidget *dtw)
 225 {
 226     return sp_dt_ruler_event(widget, event, dtw, true);
 227 }
 228
 229 int sp_dt_vruler_event(GtkWidget *widget, GdkEvent *event, SPDesktopWidget *dtw)
 230 {
 231     return sp_dt_ruler_event(widget, event, dtw, false);
 232 }
 233
 234 /* Guides */
 235 enum SPGuideDragType {
 236     SP_DRAG_TRANSLATE,
 237     SP_DRAG_TRANSLATE_CONSTRAINED, // Is not being used currently!
 238     SP_DRAG_ROTATE,
 239     SP_DRAG_MOVE_ORIGIN,
 240     SP_DRAG_NONE
 241 };
 242
 243 static Geom::Point drag_origin;
 244 static SPGuideDragType drag_type = SP_DRAG_NONE;
 245 //static bool reset_drag_origin = false; // when Ctrl is pressed while dragging, this is used to trigger resetting of the
 246 //                                       // drag origin to that location so that constrained movement is more intuitive
 247
 248 // Min distance from anchor to initiate rotation, measured in screenpixels
 249 #define tol 40.0
 250
 251 gint sp_dt_guide_event(SPCanvasItem *item, GdkEvent *event, gpointer data)
 252 {
 253     static bool moved = false;
 254     gint ret = FALSE;
 255
 256     SPGuide *guide = SP_GUIDE(data);
 257     SPDesktop *desktop = static_cast<SPDesktop*>(gtk_object_get_data(GTK_OBJECT(item->canvas), "SPDesktop"));
 258
 259     switch (event->type) {
 260         case GDK_2BUTTON_PRESS:
 261             if (event->button.button == 1) {
 262                 drag_type = SP_DRAG_NONE;
 263                 sp_event_context_snap_window_closed(desktop->event_context);
 264                 sp_canvas_item_ungrab(item, event->button.time);
 265                 Inkscape::UI::Dialogs::GuidelinePropertiesDialog::showDialog(guide, desktop);
 266                 ret = TRUE;
 267             }
 268             break;
 269         case GDK_BUTTON_PRESS:
 270             if (event->button.button == 1) {
 271                 sp_event_context_snap_window_open(desktop->event_context);
 272                 Geom::Point const event_w(event->button.x, event->button.y);
 273                 Geom::Point const event_dt(desktop->w2d(event_w));
 274
 275                 // Due to the tolerance allowed when grabbing a guide, event_dt will generally
 276                 // be close to the guide but not just exactly on it. The drag origin calculated
 277                 // here must be exactly on the guide line though, otherwise
 278                 // small errors will occur once we snap, see
 279                 // https://bugs.launchpad.net/inkscape/+bug/333762
 280                 drag_origin = Geom::projection(event_dt, Geom::Line(guide->point_on_line, guide->angle()));
 281
 282                 if (event->button.state & GDK_SHIFT_MASK) {
 283                     // with shift we rotate the guide
 284                     drag_type = SP_DRAG_ROTATE;
 285                 } else {
 286                     if (event->button.state & GDK_CONTROL_MASK) {
 287                         drag_type = SP_DRAG_MOVE_ORIGIN;
 288                     } else {
 289                         drag_type = SP_DRAG_TRANSLATE;
 290                     }
 291                 }
 292
 293                 if (drag_type == SP_DRAG_ROTATE || drag_type == SP_DRAG_TRANSLATE) {
 294                     sp_canvas_item_grab(item,
 295                                         ( GDK_BUTTON_RELEASE_MASK  |
 296                                           GDK_BUTTON_PRESS_MASK    |
 297                                           GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK ),
 298                                         NULL,
 299                                         event->button.time);
 300                 }
 301                 ret = TRUE;
 302             }
 303             break;
 304         case GDK_MOTION_NOTIFY:
 305             if (drag_type != SP_DRAG_NONE) {
 306                 Geom::Point const motion_w(event->motion.x,
 307                                            event->motion.y);
 308                 Geom::Point motion_dt(desktop->w2d(motion_w));
 309
 310                 // This is for snapping while dragging existing guidelines. New guidelines,
 311                 // which are dragged off the ruler, are being snapped in sp_dt_ruler_event
 312                 SnapManager &m = desktop->namedview->snap_manager;
 313                 m.setup(desktop, true, NULL, NULL, guide);
 314                 if (drag_type == SP_DRAG_MOVE_ORIGIN) {
 315                     // If we snap in guideConstrainedSnap() below, then motion_dt will
 316                     // be forced to be on the guide. If we don't snap however, then
 317                     // the origin should still be constrained to the guide. So let's do
 318                     // that explicitly first:
 319
 320                     Geom::Line line(guide->point_on_line, guide->angle());
 321                     Geom::Coord t = line.nearestPoint(motion_dt);
 322                     motion_dt = line.pointAt(t);
 323                     m.guideConstrainedSnap(motion_dt, *guide);
 324                 } else {
 325                     m.guideFreeSnap(motion_dt, guide->normal_to_line);
 326                 }
 327
 328                 switch (drag_type) {
 329                     case SP_DRAG_TRANSLATE:
 330                     {
 331                         sp_guide_moveto(*guide, motion_dt, false);
 332                         break;
 333                     }
 334                     case SP_DRAG_TRANSLATE_CONSTRAINED: // Is not being used currently!
 335                     {
 336                         Geom::Point pt_constr = Geom::constrain_angle(guide->point_on_line, motion_dt);
 337                         sp_guide_moveto(*guide, pt_constr, false);
 338                         break;
 339                     }
 340                     case SP_DRAG_ROTATE:
 341                     {
 342                         Geom::Point pt = motion_dt - guide->point_on_line;
 343                         double angle = std::atan2(pt[Geom::Y], pt[Geom::X]);
 344                         if  (event->motion.state & GDK_CONTROL_MASK) {
 345                             Inkscape::Preferences *prefs = Inkscape::Preferences::get();
 346                             unsigned const snaps = abs(prefs->getInt("/options/rotationsnapsperpi/value", 12));
 347                             if (snaps) {
 348                                 double sections = floor(angle * snaps / M_PI + .5);
 349                                 angle = (M_PI / snaps) * sections;
 350                             }
 351                         }
 352                         sp_guide_set_normal(*guide, Geom::Point(1,0) * Geom::Rotate(angle + M_PI_2), false);
 353                         break;
 354                     }
 355                     case SP_DRAG_MOVE_ORIGIN:
 356                     {
 357                         sp_guide_moveto(*guide, motion_dt, false);
 358                         break;
 359                     }
 360                     case SP_DRAG_NONE:
 361                         g_assert_not_reached();
 362                         break;
 363                 }
 364                 moved = true;
 365                 desktop->set_coordinate_status(from_2geom(motion_dt));
 366                 desktop->setPosition(from_2geom(motion_dt));
 367
 368                 ret = TRUE;
 369             }
 370             break;
 371     case GDK_BUTTON_RELEASE:
 372             if (drag_type != SP_DRAG_NONE && event->button.button == 1) {
 373                 if (moved) {
 374                     Geom::Point const event_w(event->button.x,
 375                                               event->button.y);
 376                     Geom::Point event_dt(desktop->w2d(event_w));
 377
 378                     SnapManager &m = desktop->namedview->snap_manager;
 379                     m.setup(desktop, true, NULL, NULL, guide);
 380                     if (drag_type == SP_DRAG_MOVE_ORIGIN) {
 381                         // If we snap in guideConstrainedSnap() below, then motion_dt will
 382                         // be forced to be on the guide. If we don't snap however, then
 383                         // the origin should still be constrained to the guide. So let's
 384                         // do that explicitly first:
 385                         Geom::Line line(guide->point_on_line, guide->angle());
 386                         Geom::Coord t = line.nearestPoint(event_dt);
 387                         event_dt = line.pointAt(t);
 388                         m.guideConstrainedSnap(event_dt, *guide);
 389                     } else {
 390                         m.guideFreeSnap(event_dt, guide->normal_to_line);
 391                     }
 392
 393                     if (sp_canvas_world_pt_inside_window(item->canvas, event_w)) {
 394                         switch (drag_type) {
 395                             case SP_DRAG_TRANSLATE:
 396                             {
 397                                 sp_guide_moveto(*guide, event_dt, true);
 398                                 break;
 399                             }
 400                             case SP_DRAG_TRANSLATE_CONSTRAINED: // Is not being used currently!
 401                             {
 402                                 Geom::Point pt_constr = Geom::constrain_angle(guide->point_on_line, event_dt);
 403                                 sp_guide_moveto(*guide, pt_constr, true);
 404                                 break;
 405                             }
 406                             case SP_DRAG_ROTATE:
 407                             {
 408                                 Geom::Point pt = event_dt - guide->point_on_line;
 409                                 double angle = std::atan2(pt[Geom::Y], pt[Geom::X]);
 410                                 if  (event->motion.state & GDK_CONTROL_MASK) {
 411                                     Inkscape::Preferences *prefs = Inkscape::Preferences::get();
 412                                     unsigned const snaps = abs(prefs->getInt("/options/rotationsnapsperpi/value", 12));
 413                                     if (snaps) {
 414                                         double sections = floor(angle * snaps / M_PI + .5);
 415                                         angle = (M_PI / snaps) * sections;
 416                                     }
 417                                 }
 418                                 sp_guide_set_normal(*guide, Geom::Point(1,0) * Geom::Rotate(angle + M_PI_2), true);
 419                                 break;
 420                             }
 421                             case SP_DRAG_MOVE_ORIGIN:
 422                             {
 423                                 sp_guide_moveto(*guide, event_dt, true);
 424                                 break;
 425                             }
 426                             case SP_DRAG_NONE:
 427                                 g_assert_not_reached();
 428                                 break;
 429                         }
 430                         sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 431                                          _("Move guide"));
 432                     } else {
 433                         /* Undo movement of any attached shapes. */
 434                         sp_guide_moveto(*guide, guide->point_on_line, false);
 435                         sp_guide_set_normal(*guide, guide->normal_to_line, false);
 436                         sp_guide_remove(guide);
 437                         sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 438                                      _("Delete guide"));
 439                     }
 440                     moved = false;
 441                     desktop->set_coordinate_status(from_2geom(event_dt));
 442                     desktop->setPosition (from_2geom(event_dt));
 443                 }
 444                 drag_type = SP_DRAG_NONE;
 445                 sp_event_context_snap_window_closed(desktop->event_context);
 446                 sp_canvas_item_ungrab(item, event->button.time);
 447                 ret=TRUE;
 448             }
 449     case GDK_ENTER_NOTIFY:
 450     {
 451             sp_guideline_set_color(SP_GUIDELINE(item), guide->hicolor);
 452
 453             // set move or rotate cursor
 454             Geom::Point const event_w(event->crossing.x, event->crossing.y);
 455             Geom::Point const event_dt(desktop->w2d(event_w));
 456
 457             if (event->crossing.state & GDK_SHIFT_MASK) {
 458                 GdkCursor *guide_cursor;
 459                 guide_cursor = gdk_cursor_new (GDK_EXCHANGE);
 460                 gdk_window_set_cursor(GTK_WIDGET(sp_desktop_canvas(desktop))->window, guide_cursor);
 461                 gdk_cursor_unref(guide_cursor);
 462             }
 463
 464             char *guide_description = sp_guide_description(guide);
 465             desktop->guidesMessageContext()->setF(Inkscape::NORMAL_MESSAGE, _("<b>Guideline</b>: %s"), guide_description);
 466             g_free(guide_description);
 467             break;
 468     }
 469     case GDK_LEAVE_NOTIFY:
 470             sp_guideline_set_color(SP_GUIDELINE(item), guide->color);
 471
 472             // restore event context's cursor
 473             gdk_window_set_cursor(GTK_WIDGET(sp_desktop_canvas(desktop))->window, desktop->event_context->cursor);
 474
 475             desktop->guidesMessageContext()->clear();
 476             break;
 477         case GDK_KEY_PRESS:
 478             switch (get_group0_keyval (&event->key)) {
 479                 case GDK_Delete:
 480                 case GDK_KP_Delete:
 481                 case GDK_BackSpace:
 482                 {
 483                     SPDocument *doc = SP_OBJECT_DOCUMENT(guide);
 484                     sp_guide_remove(guide);
 485                     sp_document_done(doc, SP_VERB_NONE, _("Delete guide"));
 486                     ret = TRUE;
 487                     break;
 488                 }
 489                 case GDK_Shift_L:
 490                 case GDK_Shift_R:
 491                     GdkCursor *guide_cursor;
 492                     guide_cursor = gdk_cursor_new (GDK_EXCHANGE);
 493                     gdk_window_set_cursor(GTK_WIDGET(sp_desktop_canvas(desktop))->window, guide_cursor);
 494                     gdk_cursor_unref(guide_cursor);
 495                     ret = TRUE;
 496                 default:
 497                     // do nothing;
 498                     break;
 499             }
 500             break;
 501         case GDK_KEY_RELEASE:
 502             switch (get_group0_keyval (&event->key)) {
 503                 case GDK_Shift_L:
 504                 case GDK_Shift_R:
 505                     GdkCursor *guide_cursor;
 506                     guide_cursor = gdk_cursor_new (GDK_EXCHANGE);
 507                     gdk_window_set_cursor(GTK_WIDGET(sp_desktop_canvas(desktop))->window, guide_cursor);
 508                     gdk_cursor_unref(guide_cursor);
 509                     break;
 510                 default:
 511                     // do nothing;
 512                     break;
 513             }
 514     default:
 515         break;
 516     }
 517
 518     return ret;
 519 }
 520
 521 //static std::map<GdkInputSource, std::string> switchMap;
 522 static std::map<std::string, int> toolToUse;
 523 static std::string lastName;
 524 static GdkInputSource lastType = GDK_SOURCE_MOUSE;
 525
 526 static void init_extended()
 527 {
 528     std::string avoidName = "pad";
 529     GList* devices = gdk_devices_list();
 530     if ( devices ) {
 531         for ( GList* curr = devices; curr; curr = g_list_next(curr) ) {
 532             GdkDevice* dev = reinterpret_cast<GdkDevice*>(curr->data);
 533             if ( dev->name
 534                  && (avoidName != dev->name)
 535                  && (dev->source != GDK_SOURCE_MOUSE) ) {
 536 //                 g_message("Adding '%s' as [%d]", dev->name, dev->source);
 537
 538                 // Set the initial tool for the device
 539                 switch ( dev->source ) {
 540                     case GDK_SOURCE_PEN:
 541                         toolToUse[dev->name] = TOOLS_CALLIGRAPHIC;
 542                         break;
 543                     case GDK_SOURCE_ERASER:
 544                         toolToUse[dev->name] = TOOLS_ERASER;
 545                         break;
 546                     case GDK_SOURCE_CURSOR:
 547                         toolToUse[dev->name] = TOOLS_SELECT;
 548                         break;
 549                     default:
 550                         ; // do not add
 551                 }
 552 //            } else if (dev->name) {
 553 //                 g_message("Skippn '%s' as [%s]", dev->name, dev->source);
 554             }
 555         }
 556     }
 557 }
 558
 559
 560 void snoop_extended(GdkEvent* event, SPDesktop *desktop)
 561 {
 562     GdkInputSource source = GDK_SOURCE_MOUSE;
 563     std::string name;
 564
 565     switch ( event->type ) {
 566         case GDK_MOTION_NOTIFY:
 567         {
 568             GdkEventMotion* event2 = reinterpret_cast<GdkEventMotion*>(event);
 569             if ( event2->device ) {
 570                 source = event2->device->source;
 571                 name = event2->device->name;
 572             }
 573         }
 574         break;
 575
 576         case GDK_BUTTON_PRESS:
 577         case GDK_2BUTTON_PRESS:
 578         case GDK_3BUTTON_PRESS:
 579         case GDK_BUTTON_RELEASE:
 580         {
 581             GdkEventButton* event2 = reinterpret_cast<GdkEventButton*>(event);
 582             if ( event2->device ) {
 583                 source = event2->device->source;
 584                 name = event2->device->name;
 585             }
 586         }
 587         break;
 588
 589         case GDK_SCROLL:
 590         {
 591             GdkEventScroll* event2 = reinterpret_cast<GdkEventScroll*>(event);
 592             if ( event2->device ) {
 593                 source = event2->device->source;
 594                 name = event2->device->name;
 595             }
 596         }
 597         break;
 598
 599         case GDK_PROXIMITY_IN:
 600         case GDK_PROXIMITY_OUT:
 601         {
 602             GdkEventProximity* event2 = reinterpret_cast<GdkEventProximity*>(event);
 603             if ( event2->device ) {
 604                 source = event2->device->source;
 605                 name = event2->device->name;
 606             }
 607         }
 608         break;
 609
 610         default:
 611             ;
 612     }
 613
 614     if (!name.empty()) {
 615         if ( lastType != source || lastName != name ) {
 616             // The device switched. See if it is one we 'count'
 617             //g_message("Changed device %s -> %s", lastName.c_str(), name.c_str());
 618             std::map<std::string, int>::iterator it = toolToUse.find(lastName);
 619             if (it != toolToUse.end()) {
 620                 // Save the tool currently selected for next time the input
 621                 // device shows up.
 622                 it->second = tools_active(desktop);
 623             }
 624
 625             it = toolToUse.find(name);
 626             if (it != toolToUse.end() ) {
 627                 tools_switch(desktop, it->second);
 628             }
 629
 630             lastName = name;
 631             lastType = source;
 632         }
 633     }
 634 }
 635
 636
 637
 638 /*
 639   Local Variables:
 640   mode:c++
 641   c-file-style:"stroustrup"
 642   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 643   indent-tabs-mode:nil
 644   fill-column:99
 645   End:
 646 */
 647 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :
 648