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                 sp_canvas_set_snap_delay_active(desktop->canvas, true);
  91                 Geom::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
  92                 Geom::Point const event_dt(desktop->w2d(event_w));
  93
  94                 // explicitly show guidelines; if I draw a guide, I want them on
  95                 sp_repr_set_boolean(repr, "showguides", TRUE);
  96                 sp_repr_set_boolean(repr, "inkscape:guide-bbox", TRUE);
  97
  98                 // calculate the normal of the guidelines when dragged from the edges of rulers.
  99                 Geom::Point normal_bl_to_tr(-1.,1.); //bottomleft to topright
 100                 Geom::Point normal_tr_to_bl(1.,1.); //topright to bottomleft
 101                 normal_bl_to_tr.normalize();
 102                 normal_tr_to_bl.normalize();
 103                 Inkscape::CanvasGrid * grid = sp_namedview_get_first_enabled_grid(desktop->namedview);
 104                 if ( grid && grid->getGridType() == Inkscape::GRID_AXONOMETRIC ) {
 105                     Inkscape::CanvasAxonomGrid *axonomgrid = dynamic_cast<Inkscape::CanvasAxonomGrid *>(grid);
 106                     if (event->button.state & GDK_CONTROL_MASK) {
 107                         // guidelines normal to gridlines
 108                         normal_bl_to_tr = Geom::Point::polar(-axonomgrid->angle_rad[0], 1.0);
 109                         normal_tr_to_bl = Geom::Point::polar(axonomgrid->angle_rad[2], 1.0);
 110                     } else {
 111                         normal_bl_to_tr = rot90(Geom::Point::polar(axonomgrid->angle_rad[2], 1.0));
 112                         normal_tr_to_bl = rot90(Geom::Point::polar(-axonomgrid->angle_rad[0], 1.0));
 113                     }
 114                 }
 115                 if (horiz) {
 116                     if (wx < 50) {
 117                         normal = normal_bl_to_tr;
 118                     } else if (wx > width - 50) {
 119                         normal = normal_tr_to_bl;
 120                     } else {
 121                         normal = Geom::Point(0.,1.);
 122                     }
 123                 } else {
 124                     if (wy < 50) {
 125                         normal = normal_bl_to_tr;
 126                     } else if (wy > height - 50) {
 127                         normal = normal_tr_to_bl;
 128                     } else {
 129                         normal = Geom::Point(1.,0.);
 130                     }
 131                 }
 132
 133                 guide = sp_guideline_new(desktop->guides, event_dt, normal);
 134                 sp_guideline_set_color(SP_GUIDELINE(guide), desktop->namedview->guidehicolor);
 135                 gdk_pointer_grab(widget->window, FALSE,
 136                                  (GdkEventMask)(GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK ),
 137                                  NULL, NULL,
 138                                  event->button.time);
 139             }
 140             break;
 141     case GDK_MOTION_NOTIFY:
 142             if (dragging) {
 143                 Geom::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
 144                 Geom::Point event_dt(desktop->w2d(event_w));
 145
 146                 SnapManager &m = desktop->namedview->snap_manager;
 147                 m.setup(desktop);
 148                 m.guideSnap(event_dt, normal);
 149
 150                 sp_guideline_set_position(SP_GUIDELINE(guide), from_2geom(event_dt));
 151                 desktop->set_coordinate_status(to_2geom(event_dt));
 152                 desktop->setPosition(to_2geom(event_dt));
 153             }
 154             break;
 155     case GDK_BUTTON_RELEASE:
 156             if (dragging && event->button.button == 1) {
 157                 gdk_pointer_ungrab(event->button.time);
 158                 Geom::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
 159                 Geom::Point event_dt(desktop->w2d(event_w));
 160
 161                 SnapManager &m = desktop->namedview->snap_manager;
 162                 m.setup(desktop);
 163                 m.guideSnap(event_dt, normal);
 164
 165                 dragging = false;
 166                 sp_canvas_set_snap_delay_active(desktop->canvas, false);
 167                 gtk_object_destroy(GTK_OBJECT(guide));
 168                 guide = NULL;
 169                 if ((horiz ? wy : wx) >= 0) {
 170                     Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
 171                     Inkscape::XML::Node *repr = xml_doc->createElement("sodipodi:guide");
 172                     sp_repr_set_point(repr, "orientation", normal);
 173                     sp_repr_set_point(repr, "position", from_2geom(event_dt));
 174                     SP_OBJECT_REPR(desktop->namedview)->appendChild(repr);
 175                     Inkscape::GC::release(repr);
 176                     sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 177                                      _("Create guide"));
 178                 }
 179                 desktop->set_coordinate_status(from_2geom(event_dt));
 180             }
 181         default:
 182             break;
 183     }
 184
 185     return FALSE;
 186 }
 187
 188 int sp_dt_hruler_event(GtkWidget *widget, GdkEvent *event, SPDesktopWidget *dtw)
 189 {
 190     return sp_dt_ruler_event(widget, event, dtw, true);
 191 }
 192
 193 int sp_dt_vruler_event(GtkWidget *widget, GdkEvent *event, SPDesktopWidget *dtw)
 194 {
 195     return sp_dt_ruler_event(widget, event, dtw, false);
 196 }
 197
 198 /* Guides */
 199
 200 static Geom::Point drag_origin;
 201
 202 enum SPGuideDragType {
 203     SP_DRAG_TRANSLATE,
 204     SP_DRAG_TRANSLATE_CONSTRAINED,
 205     SP_DRAG_ROTATE,
 206     SP_DRAG_MOVE_ORIGIN,
 207     SP_DRAG_NONE
 208 };
 209
 210 static SPGuideDragType drag_type = SP_DRAG_NONE;
 211
 212 gint sp_dt_guide_event(SPCanvasItem *item, GdkEvent *event, gpointer data)
 213 {
 214     static bool moved = false;
 215     gint ret = FALSE;
 216
 217     SPGuide *guide = SP_GUIDE(data);
 218     SPDesktop *desktop = static_cast<SPDesktop*>(gtk_object_get_data(GTK_OBJECT(item->canvas), "SPDesktop"));
 219
 220     switch (event->type) {
 221         case GDK_2BUTTON_PRESS:
 222             if (event->button.button == 1) {
 223                 drag_type = SP_DRAG_NONE;
 224                 sp_canvas_set_snap_delay_active(desktop->canvas, false);
 225                 sp_canvas_item_ungrab(item, event->button.time);
 226                 Inkscape::UI::Dialogs::GuidelinePropertiesDialog::showDialog(guide, desktop);
 227                 ret = TRUE;
 228             }
 229             break;
 230         case GDK_BUTTON_PRESS:
 231             if (event->button.button == 1) {
 232                 if (event->button.state & GDK_CONTROL_MASK) {
 233                     SPDocument *doc = SP_OBJECT_DOCUMENT(guide);
 234                     sp_guide_remove(guide);
 235                     sp_document_done(doc, SP_VERB_NONE, _("Delete guide"));
 236                     ret = TRUE;
 237                     break;
 238                 }
 239
 240                 sp_canvas_set_snap_delay_active(desktop->canvas, true);
 241                 double tol = 40.0;
 242                 Geom::Point const event_w(event->button.x, event->button.y);
 243                 Geom::Point const event_dt(desktop->w2d(event_w));
 244                 drag_origin = event_dt;
 245                 if (Geom::L2(guide->point_on_line - event_dt) < tol) {
 246                     // the click was on the guide 'anchor'
 247                     drag_type = (event->button.state & GDK_SHIFT_MASK) ? SP_DRAG_MOVE_ORIGIN : SP_DRAG_TRANSLATE;
 248                 } else {
 249                     drag_type = (event->button.state & GDK_SHIFT_MASK) ? SP_DRAG_ROTATE : SP_DRAG_TRANSLATE;
 250                     sp_canvas_item_grab(item,
 251                                         ( GDK_BUTTON_RELEASE_MASK  |
 252                                           GDK_BUTTON_PRESS_MASK    |
 253                                           GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK ),
 254                                         NULL,
 255                                         event->button.time);
 256                 }
 257                 ret = TRUE;
 258             }
 259             break;
 260         case GDK_MOTION_NOTIFY:
 261             if (drag_type != SP_DRAG_NONE) {
 262                 Geom::Point const motion_w(event->motion.x,
 263                                            event->motion.y);
 264                 Geom::Point motion_dt(desktop->w2d(motion_w));
 265
 266                 // This is for snapping while dragging existing guidelines. New guidelines,
 267                 // which are dragged off the ruler, are being snapped in sp_dt_ruler_event
 268                 SnapManager &m = desktop->namedview->snap_manager;
 269                 m.setup(desktop);
 270                 m.guideSnap(motion_dt, to_2geom(guide->normal_to_line));
 271
 272                 switch (drag_type) {
 273                     case SP_DRAG_TRANSLATE:
 274                     {
 275                         sp_guide_moveto(*guide, guide->point_on_line + motion_dt - drag_origin, false);
 276                         break;
 277                     }
 278                     case SP_DRAG_TRANSLATE_CONSTRAINED:
 279                     {
 280                         Geom::Point pt_constr = Geom::constrain_angle(guide->point_on_line, motion_dt);
 281                         sp_guide_moveto(*guide, pt_constr, false);
 282                         break;
 283                     }
 284                     case SP_DRAG_ROTATE:
 285                     {
 286                         double angle = angle_between(drag_origin - guide->point_on_line, motion_dt - guide->point_on_line);
 287                         sp_guide_set_normal(*guide, guide->normal_to_line * Geom::Rotate(angle), false);
 288                         break;
 289                     }
 290                     case SP_DRAG_MOVE_ORIGIN:
 291                     {
 292                         Geom::Line line(guide->point_on_line, guide->angle());
 293                         Geom::Coord t = line.nearestPoint(motion_dt);
 294                         sp_guide_moveto(*guide, line.pointAt(t), false);
 295                         break;
 296                     }
 297                     case SP_DRAG_NONE:
 298                         g_assert_not_reached();
 299                         break;
 300                 }
 301                 moved = true;
 302                 desktop->set_coordinate_status(from_2geom(motion_dt));
 303                 desktop->setPosition(from_2geom(motion_dt));
 304
 305                 ret = TRUE;
 306             }
 307             break;
 308     case GDK_BUTTON_RELEASE:
 309             if (drag_type != SP_DRAG_NONE && event->button.button == 1) {
 310                 if (moved) {
 311                     Geom::Point const event_w(event->button.x,
 312                                               event->button.y);
 313                     Geom::Point event_dt(desktop->w2d(event_w));
 314
 315                     SnapManager &m = desktop->namedview->snap_manager;
 316                     m.setup(desktop);
 317                     m.guideSnap(event_dt, guide->normal_to_line);
 318
 319                     if (sp_canvas_world_pt_inside_window(item->canvas, event_w)) {
 320                         switch (drag_type) {
 321                             case SP_DRAG_TRANSLATE:
 322                             {
 323                                 sp_guide_moveto(*guide, guide->point_on_line + event_dt - drag_origin, true);
 324                                 break;
 325                             }
 326                             case SP_DRAG_TRANSLATE_CONSTRAINED:
 327                             {
 328                                 Geom::Point pt_constr = Geom::constrain_angle(guide->point_on_line, event_dt);
 329                                 sp_guide_moveto(*guide, pt_constr, true);
 330                                 break;
 331                             }
 332                             case SP_DRAG_ROTATE:
 333                             {
 334                                 double angle = angle_between(drag_origin - guide->point_on_line, event_dt - guide->point_on_line);
 335                                 sp_guide_set_normal(*guide, guide->normal_to_line * Geom::Rotate(angle), true);
 336                                 break;
 337                             }
 338                             case SP_DRAG_MOVE_ORIGIN:
 339                             {
 340                                 Geom::Line line(guide->point_on_line, guide->angle());
 341                                 Geom::Coord t = line.nearestPoint(event_dt);
 342                                 sp_guide_moveto(*guide, line.pointAt(t), true);
 343                                 break;
 344                             }
 345                             case SP_DRAG_NONE:
 346                                 g_assert_not_reached();
 347                                 break;
 348                         }
 349                         sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 350                                          _("Move guide"));
 351                     } else {
 352                         /* Undo movement of any attached shapes. */
 353                         sp_guide_moveto(*guide, guide->point_on_line, false);
 354                         sp_guide_set_normal(*guide, guide->normal_to_line, false);
 355                         sp_guide_remove(guide);
 356                         sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 357                                      _("Delete guide"));
 358                     }
 359                     moved = false;
 360                     desktop->set_coordinate_status(from_2geom(event_dt));
 361                     desktop->setPosition (from_2geom(event_dt));
 362                 }
 363                 drag_type = SP_DRAG_NONE;
 364                 sp_canvas_set_snap_delay_active(desktop->canvas, false);
 365                 sp_canvas_item_ungrab(item, event->button.time);
 366                 ret=TRUE;
 367             }
 368     case GDK_ENTER_NOTIFY:
 369     {
 370             sp_guideline_set_color(SP_GUIDELINE(item), guide->hicolor);
 371
 372             char *guide_description = sp_guide_description(guide);
 373             desktop->guidesMessageContext()->setF(Inkscape::NORMAL_MESSAGE, _("<b>Guideline</b>: %s"), guide_description);
 374             g_free(guide_description);
 375             break;
 376     }
 377     case GDK_LEAVE_NOTIFY:
 378             sp_guideline_set_color(SP_GUIDELINE(item), guide->color);
 379             desktop->guidesMessageContext()->clear();
 380             break;
 381     default:
 382             break;
 383     }
 384
 385     return ret;
 386 }
 387
 388 //static std::map<GdkInputSource, std::string> switchMap;
 389 static std::map<std::string, int> toolToUse;
 390 static std::string lastName;
 391 static GdkInputSource lastType = GDK_SOURCE_MOUSE;
 392
 393 static void init_extended()
 394 {
 395     std::string avoidName = "pad";
 396     GList* devices = gdk_devices_list();
 397     if ( devices ) {
 398         for ( GList* curr = devices; curr; curr = g_list_next(curr) ) {
 399             GdkDevice* dev = reinterpret_cast<GdkDevice*>(curr->data);
 400             if ( dev->name
 401                  && (avoidName != dev->name)
 402                  && (dev->source != GDK_SOURCE_MOUSE) ) {
 403 //                 g_message("Adding '%s' as [%d]", dev->name, dev->source);
 404
 405                 // Set the initial tool for the device
 406                 switch ( dev->source ) {
 407                     case GDK_SOURCE_PEN:
 408                         toolToUse[dev->name] = TOOLS_CALLIGRAPHIC;
 409                         break;
 410                     case GDK_SOURCE_ERASER:
 411                         toolToUse[dev->name] = TOOLS_ERASER;
 412                         break;
 413                     case GDK_SOURCE_CURSOR:
 414                         toolToUse[dev->name] = TOOLS_SELECT;
 415                         break;
 416                     default:
 417                         ; // do not add
 418                 }
 419 //            } else if (dev->name) {
 420 //                 g_message("Skippn '%s' as [%s]", dev->name, dev->source);
 421             }
 422         }
 423     }
 424 }
 425
 426
 427 void snoop_extended(GdkEvent* event, SPDesktop *desktop)
 428 {
 429     GdkInputSource source = GDK_SOURCE_MOUSE;
 430     std::string name;
 431
 432     switch ( event->type ) {
 433         case GDK_MOTION_NOTIFY:
 434         {
 435             GdkEventMotion* event2 = reinterpret_cast<GdkEventMotion*>(event);
 436             if ( event2->device ) {
 437                 source = event2->device->source;
 438                 name = event2->device->name;
 439             }
 440         }
 441         break;
 442
 443         case GDK_BUTTON_PRESS:
 444         case GDK_2BUTTON_PRESS:
 445         case GDK_3BUTTON_PRESS:
 446         case GDK_BUTTON_RELEASE:
 447         {
 448             GdkEventButton* event2 = reinterpret_cast<GdkEventButton*>(event);
 449             if ( event2->device ) {
 450                 source = event2->device->source;
 451                 name = event2->device->name;
 452             }
 453         }
 454         break;
 455
 456         case GDK_SCROLL:
 457         {
 458             GdkEventScroll* event2 = reinterpret_cast<GdkEventScroll*>(event);
 459             if ( event2->device ) {
 460                 source = event2->device->source;
 461                 name = event2->device->name;
 462             }
 463         }
 464         break;
 465
 466         case GDK_PROXIMITY_IN:
 467         case GDK_PROXIMITY_OUT:
 468         {
 469             GdkEventProximity* event2 = reinterpret_cast<GdkEventProximity*>(event);
 470             if ( event2->device ) {
 471                 source = event2->device->source;
 472                 name = event2->device->name;
 473             }
 474         }
 475         break;
 476
 477         default:
 478             ;
 479     }
 480
 481     if (!name.empty()) {
 482         if ( lastType != source || lastName != name ) {
 483             // The device switched. See if it is one we 'count'
 484             //g_message("Changed device %s -> %s", lastName.c_str(), name.c_str());
 485             std::map<std::string, int>::iterator it = toolToUse.find(lastName);
 486             if (it != toolToUse.end()) {
 487                 // Save the tool currently selected for next time the input
 488                 // device shows up.
 489                 it->second = tools_active(desktop);
 490             }
 491
 492             it = toolToUse.find(name);
 493             if (it != toolToUse.end() ) {
 494                 tools_switch(desktop, it->second);
 495             }
 496
 497             lastName = name;
 498             lastType = source;
 499         }
 500     }
 501 }
 502
 503
 504
 505 /*
 506   Local Variables:
 507   mode:c++
 508   c-file-style:"stroustrup"
 509   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 510   indent-tabs-mode:nil
 511   fill-column:99
 512   End:
 513 */
 514 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :
 515