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
  70 static gint sp_dt_ruler_event(GtkWidget *widget, GdkEvent *event, SPDesktopWidget *dtw, bool horiz)
  71 {
  72     static bool dragging = false;
  73     static SPCanvasItem *guide = NULL;
  74     static Geom::Point normal;
  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 for the canvas. Dragging
  92                 // guides off the ruler will send event to the ruler and not to the canvas, which bypasses sp_canvas_motion
  93                 // The snap manager will not notice the difference, so it'll check if the snap delay has been activated (This check
  94                 // is only needed for catching coding errors, i.e. to warn if the snap delay has not been implemented properly
  95                 // in some context)
  96                 if (desktop->canvas->context_snap_delay_active == false) {
  97                                         // A dt_ruler_event might be emitted when dragging a guide of the rulers while drawing a Bezier curve
  98                         // In such a situation, we're already in that specific context and the snap delay is already active. We should
  99                         // not set the snap delay to active again, because that will trigger a similar warning to the one above
 100                         sp_canvas_set_snap_delay_active(desktop->canvas, true);
 101                 }
 102
 103                 Geom::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
 104                 Geom::Point const event_dt(desktop->w2d(event_w));
 105
 106                 // explicitly show guidelines; if I draw a guide, I want them on
 107                 sp_repr_set_boolean(repr, "showguides", TRUE);
 108                 sp_repr_set_boolean(repr, "inkscape:guide-bbox", TRUE);
 109
 110                 // calculate the normal of the guidelines when dragged from the edges of rulers.
 111                 Geom::Point normal_bl_to_tr(-1.,1.); //bottomleft to topright
 112                 Geom::Point normal_tr_to_bl(1.,1.); //topright to bottomleft
 113                 normal_bl_to_tr.normalize();
 114                 normal_tr_to_bl.normalize();
 115                 Inkscape::CanvasGrid * grid = sp_namedview_get_first_enabled_grid(desktop->namedview);
 116                 if ( grid && grid->getGridType() == Inkscape::GRID_AXONOMETRIC ) {
 117                     Inkscape::CanvasAxonomGrid *axonomgrid = dynamic_cast<Inkscape::CanvasAxonomGrid *>(grid);
 118                     if (event->button.state & GDK_CONTROL_MASK) {
 119                         // guidelines normal to gridlines
 120                         normal_bl_to_tr = Geom::Point::polar(-axonomgrid->angle_rad[0], 1.0);
 121                         normal_tr_to_bl = Geom::Point::polar(axonomgrid->angle_rad[2], 1.0);
 122                     } else {
 123                         normal_bl_to_tr = rot90(Geom::Point::polar(axonomgrid->angle_rad[2], 1.0));
 124                         normal_tr_to_bl = rot90(Geom::Point::polar(-axonomgrid->angle_rad[0], 1.0));
 125                     }
 126                 }
 127                 if (horiz) {
 128                     if (wx < 50) {
 129                         normal = normal_bl_to_tr;
 130                     } else if (wx > width - 50) {
 131                         normal = normal_tr_to_bl;
 132                     } else {
 133                         normal = Geom::Point(0.,1.);
 134                     }
 135                 } else {
 136                     if (wy < 50) {
 137                         normal = normal_bl_to_tr;
 138                     } else if (wy > height - 50) {
 139                         normal = normal_tr_to_bl;
 140                     } else {
 141                         normal = Geom::Point(1.,0.);
 142                     }
 143                 }
 144
 145                 guide = sp_guideline_new(desktop->guides, event_dt, normal);
 146                 sp_guideline_set_color(SP_GUIDELINE(guide), desktop->namedview->guidehicolor);
 147                 gdk_pointer_grab(widget->window, FALSE,
 148                                  (GdkEventMask)(GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK ),
 149                                  NULL, NULL,
 150                                  event->button.time);
 151             }
 152             break;
 153     case GDK_MOTION_NOTIFY:
 154             if (dragging) {
 155                 Geom::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
 156                 Geom::Point event_dt(desktop->w2d(event_w));
 157
 158                 SnapManager &m = desktop->namedview->snap_manager;
 159                 m.setup(desktop);
 160                 // We only have a temporary guide which is not stored in our document yet. Because the guide snapper only looks
 161                 // in the document for guides to snap to, we don't have to worry about a guide snapping to itself here
 162                 m.guideSnap(event_dt, normal);
 163
 164                 sp_guideline_set_position(SP_GUIDELINE(guide), from_2geom(event_dt));
 165                 desktop->set_coordinate_status(to_2geom(event_dt));
 166                 desktop->setPosition(to_2geom(event_dt));
 167             }
 168             break;
 169     case GDK_BUTTON_RELEASE:
 170             if (dragging && event->button.button == 1) {
 171                 gdk_pointer_ungrab(event->button.time);
 172                 Geom::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
 173                 Geom::Point event_dt(desktop->w2d(event_w));
 174
 175                 SnapManager &m = desktop->namedview->snap_manager;
 176                 m.setup(desktop);
 177                 // We only have a temporary guide which is not stored in our document yet. Because the guide snapper only looks
 178                                 // in the document for guides to snap to, we don't have to worry about a guide snapping to itself here
 179                 m.guideSnap(event_dt, normal);
 180
 181                 dragging = false;
 182                 gtk_object_destroy(GTK_OBJECT(guide));
 183                 guide = NULL;
 184                 if ((horiz ? wy : wx) >= 0) {
 185                     Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
 186                     Inkscape::XML::Node *repr = xml_doc->createElement("sodipodi:guide");
 187                     sp_repr_set_point(repr, "orientation", normal);
 188                     sp_repr_set_point(repr, "position", from_2geom(event_dt));
 189                     SP_OBJECT_REPR(desktop->namedview)->appendChild(repr);
 190                     Inkscape::GC::release(repr);
 191                     sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 192                                      _("Create guide"));
 193                 }
 194                 desktop->set_coordinate_status(from_2geom(event_dt));
 195
 196                 // A dt_ruler_event might be emitted when dragging a guide of the rulers while drawing a Bezier curve
 197                                 // In such a situation, we're already in that specific context and the snap delay is already active. We should
 198                 // interfere with that context and we should therefore leave the snap delay status as it is. So although it might
 199                 // have been set to active above on GDK_BUTTON_PRESS, we should not set it back to inactive here. That must be
 200                 // done by the context
 201             }
 202         default:
 203             break;
 204     }
 205
 206     return FALSE;
 207 }
 208
 209 int sp_dt_hruler_event(GtkWidget *widget, GdkEvent *event, SPDesktopWidget *dtw)
 210 {
 211     return sp_dt_ruler_event(widget, event, dtw, true);
 212 }
 213
 214 int sp_dt_vruler_event(GtkWidget *widget, GdkEvent *event, SPDesktopWidget *dtw)
 215 {
 216     return sp_dt_ruler_event(widget, event, dtw, false);
 217 }
 218
 219 /* Guides */
 220
 221 static Geom::Point drag_origin;
 222
 223 enum SPGuideDragType {
 224     SP_DRAG_TRANSLATE,
 225     SP_DRAG_TRANSLATE_CONSTRAINED,
 226     SP_DRAG_ROTATE,
 227     SP_DRAG_MOVE_ORIGIN,
 228     SP_DRAG_NONE
 229 };
 230
 231 static SPGuideDragType drag_type = SP_DRAG_NONE;
 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_canvas_set_snap_delay_active(desktop->canvas, false);
 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                 if (event->button.state & GDK_CONTROL_MASK) {
 254                     SPDocument *doc = SP_OBJECT_DOCUMENT(guide);
 255                     sp_guide_remove(guide);
 256                     sp_document_done(doc, SP_VERB_NONE, _("Delete guide"));
 257                     ret = TRUE;
 258                     break;
 259                 }
 260
 261                 sp_canvas_set_snap_delay_active(desktop->canvas, true);
 262                 double tol = 40.0;
 263                 Geom::Point const event_w(event->button.x, event->button.y);
 264                 Geom::Point const event_dt(desktop->w2d(event_w));
 265                 drag_origin = event_dt;
 266                 if (Geom::L2(guide->point_on_line - event_dt) < tol) {
 267                     // the click was on the guide 'anchor'
 268                     drag_type = (event->button.state & GDK_SHIFT_MASK) ? SP_DRAG_MOVE_ORIGIN : SP_DRAG_TRANSLATE;
 269                 } else {
 270                     drag_type = (event->button.state & GDK_SHIFT_MASK) ? SP_DRAG_ROTATE : SP_DRAG_TRANSLATE;
 271                     sp_canvas_item_grab(item,
 272                                         ( GDK_BUTTON_RELEASE_MASK  |
 273                                           GDK_BUTTON_PRESS_MASK    |
 274                                           GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK ),
 275                                         NULL,
 276                                         event->button.time);
 277                 }
 278                 ret = TRUE;
 279             }
 280             break;
 281         case GDK_MOTION_NOTIFY:
 282             if (drag_type != SP_DRAG_NONE) {
 283                 Geom::Point const motion_w(event->motion.x,
 284                                            event->motion.y);
 285                 Geom::Point motion_dt(desktop->w2d(motion_w));
 286
 287                 // This is for snapping while dragging existing guidelines. New guidelines,
 288                 // which are dragged off the ruler, are being snapped in sp_dt_ruler_event
 289                 SnapManager &m = desktop->namedview->snap_manager;
 290                 m.setup(desktop, true, NULL, NULL, guide);
 291                 m.guideSnap(motion_dt, to_2geom(guide->normal_to_line));
 292
 293                 switch (drag_type) {
 294                     case SP_DRAG_TRANSLATE:
 295                     {
 296                         sp_guide_moveto(*guide, guide->point_on_line + motion_dt - drag_origin, false);
 297                         break;
 298                     }
 299                     case SP_DRAG_TRANSLATE_CONSTRAINED:
 300                     {
 301                         Geom::Point pt_constr = Geom::constrain_angle(guide->point_on_line, motion_dt);
 302                         sp_guide_moveto(*guide, pt_constr, false);
 303                         break;
 304                     }
 305                     case SP_DRAG_ROTATE:
 306                     {
 307                         double angle = angle_between(drag_origin - guide->point_on_line, motion_dt - guide->point_on_line);
 308                         sp_guide_set_normal(*guide, guide->normal_to_line * Geom::Rotate(angle), false);
 309                         break;
 310                     }
 311                     case SP_DRAG_MOVE_ORIGIN:
 312                     {
 313                         Geom::Line line(guide->point_on_line, guide->angle());
 314                         Geom::Coord t = line.nearestPoint(motion_dt);
 315                         sp_guide_moveto(*guide, line.pointAt(t), false);
 316                         break;
 317                     }
 318                     case SP_DRAG_NONE:
 319                         g_assert_not_reached();
 320                         break;
 321                 }
 322                 moved = true;
 323                 desktop->set_coordinate_status(from_2geom(motion_dt));
 324                 desktop->setPosition(from_2geom(motion_dt));
 325
 326                 ret = TRUE;
 327             }
 328             break;
 329     case GDK_BUTTON_RELEASE:
 330             if (drag_type != SP_DRAG_NONE && event->button.button == 1) {
 331                 if (moved) {
 332                     Geom::Point const event_w(event->button.x,
 333                                               event->button.y);
 334                     Geom::Point event_dt(desktop->w2d(event_w));
 335
 336                     SnapManager &m = desktop->namedview->snap_manager;
 337                     m.setup(desktop, true, NULL, NULL, guide);
 338                                         m.guideSnap(event_dt, guide->normal_to_line);
 339
 340                     if (sp_canvas_world_pt_inside_window(item->canvas, event_w)) {
 341                         switch (drag_type) {
 342                             case SP_DRAG_TRANSLATE:
 343                             {
 344                                 sp_guide_moveto(*guide, guide->point_on_line + event_dt - drag_origin, true);
 345                                 break;
 346                             }
 347                             case SP_DRAG_TRANSLATE_CONSTRAINED:
 348                             {
 349                                 Geom::Point pt_constr = Geom::constrain_angle(guide->point_on_line, event_dt);
 350                                 sp_guide_moveto(*guide, pt_constr, true);
 351                                 break;
 352                             }
 353                             case SP_DRAG_ROTATE:
 354                             {
 355                                 double angle = angle_between(drag_origin - guide->point_on_line, event_dt - guide->point_on_line);
 356                                 sp_guide_set_normal(*guide, guide->normal_to_line * Geom::Rotate(angle), true);
 357                                 break;
 358                             }
 359                             case SP_DRAG_MOVE_ORIGIN:
 360                             {
 361                                 Geom::Line line(guide->point_on_line, guide->angle());
 362                                 Geom::Coord t = line.nearestPoint(event_dt);
 363                                 sp_guide_moveto(*guide, line.pointAt(t), true);
 364                                 break;
 365                             }
 366                             case SP_DRAG_NONE:
 367                                 g_assert_not_reached();
 368                                 break;
 369                         }
 370                         sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 371                                          _("Move guide"));
 372                     } else {
 373                         /* Undo movement of any attached shapes. */
 374                         sp_guide_moveto(*guide, guide->point_on_line, false);
 375                         sp_guide_set_normal(*guide, guide->normal_to_line, false);
 376                         sp_guide_remove(guide);
 377                         sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 378                                      _("Delete guide"));
 379                     }
 380                     moved = false;
 381                     desktop->set_coordinate_status(from_2geom(event_dt));
 382                     desktop->setPosition (from_2geom(event_dt));
 383                 }
 384                 drag_type = SP_DRAG_NONE;
 385                 sp_canvas_set_snap_delay_active(desktop->canvas, false);
 386                 sp_canvas_item_ungrab(item, event->button.time);
 387                 ret=TRUE;
 388             }
 389     case GDK_ENTER_NOTIFY:
 390     {
 391             sp_guideline_set_color(SP_GUIDELINE(item), guide->hicolor);
 392
 393             char *guide_description = sp_guide_description(guide);
 394             desktop->guidesMessageContext()->setF(Inkscape::NORMAL_MESSAGE, _("<b>Guideline</b>: %s"), guide_description);
 395             g_free(guide_description);
 396             break;
 397     }
 398     case GDK_LEAVE_NOTIFY:
 399             sp_guideline_set_color(SP_GUIDELINE(item), guide->color);
 400             desktop->guidesMessageContext()->clear();
 401             break;
 402     default:
 403             break;
 404     }
 405
 406     return ret;
 407 }
 408
 409 //static std::map<GdkInputSource, std::string> switchMap;
 410 static std::map<std::string, int> toolToUse;
 411 static std::string lastName;
 412 static GdkInputSource lastType = GDK_SOURCE_MOUSE;
 413
 414 static void init_extended()
 415 {
 416     std::string avoidName = "pad";
 417     GList* devices = gdk_devices_list();
 418     if ( devices ) {
 419         for ( GList* curr = devices; curr; curr = g_list_next(curr) ) {
 420             GdkDevice* dev = reinterpret_cast<GdkDevice*>(curr->data);
 421             if ( dev->name
 422                  && (avoidName != dev->name)
 423                  && (dev->source != GDK_SOURCE_MOUSE) ) {
 424 //                 g_message("Adding '%s' as [%d]", dev->name, dev->source);
 425
 426                 // Set the initial tool for the device
 427                 switch ( dev->source ) {
 428                     case GDK_SOURCE_PEN:
 429                         toolToUse[dev->name] = TOOLS_CALLIGRAPHIC;
 430                         break;
 431                     case GDK_SOURCE_ERASER:
 432                         toolToUse[dev->name] = TOOLS_ERASER;
 433                         break;
 434                     case GDK_SOURCE_CURSOR:
 435                         toolToUse[dev->name] = TOOLS_SELECT;
 436                         break;
 437                     default:
 438                         ; // do not add
 439                 }
 440 //            } else if (dev->name) {
 441 //                 g_message("Skippn '%s' as [%s]", dev->name, dev->source);
 442             }
 443         }
 444     }
 445 }
 446
 447
 448 void snoop_extended(GdkEvent* event, SPDesktop *desktop)
 449 {
 450     GdkInputSource source = GDK_SOURCE_MOUSE;
 451     std::string name;
 452
 453     switch ( event->type ) {
 454         case GDK_MOTION_NOTIFY:
 455         {
 456             GdkEventMotion* event2 = reinterpret_cast<GdkEventMotion*>(event);
 457             if ( event2->device ) {
 458                 source = event2->device->source;
 459                 name = event2->device->name;
 460             }
 461         }
 462         break;
 463
 464         case GDK_BUTTON_PRESS:
 465         case GDK_2BUTTON_PRESS:
 466         case GDK_3BUTTON_PRESS:
 467         case GDK_BUTTON_RELEASE:
 468         {
 469             GdkEventButton* event2 = reinterpret_cast<GdkEventButton*>(event);
 470             if ( event2->device ) {
 471                 source = event2->device->source;
 472                 name = event2->device->name;
 473             }
 474         }
 475         break;
 476
 477         case GDK_SCROLL:
 478         {
 479             GdkEventScroll* event2 = reinterpret_cast<GdkEventScroll*>(event);
 480             if ( event2->device ) {
 481                 source = event2->device->source;
 482                 name = event2->device->name;
 483             }
 484         }
 485         break;
 486
 487         case GDK_PROXIMITY_IN:
 488         case GDK_PROXIMITY_OUT:
 489         {
 490             GdkEventProximity* event2 = reinterpret_cast<GdkEventProximity*>(event);
 491             if ( event2->device ) {
 492                 source = event2->device->source;
 493                 name = event2->device->name;
 494             }
 495         }
 496         break;
 497
 498         default:
 499             ;
 500     }
 501
 502     if (!name.empty()) {
 503         if ( lastType != source || lastName != name ) {
 504             // The device switched. See if it is one we 'count'
 505             //g_message("Changed device %s -> %s", lastName.c_str(), name.c_str());
 506             std::map<std::string, int>::iterator it = toolToUse.find(lastName);
 507             if (it != toolToUse.end()) {
 508                 // Save the tool currently selected for next time the input
 509                 // device shows up.
 510                 it->second = tools_active(desktop);
 511             }
 512
 513             it = toolToUse.find(name);
 514             if (it != toolToUse.end() ) {
 515                 tools_switch(desktop, it->second);
 516             }
 517
 518             lastName = name;
 519             lastType = source;
 520         }
 521     }
 522 }
 523
 524
 525
 526 /*
 527   Local Variables:
 528   mode:c++
 529   c-file-style:"stroustrup"
 530   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 531   indent-tabs-mode:nil
 532   fill-column:99
 533   End:
 534 */
 535 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :
 536