src/desktop-events.cpp

   1 #define __SP_DESKTOP_EVENTS_C__
   2
   3 /*
   4  * Event handlers for SPDesktop
   5  *
   6  * Author:
   7  *   Lauris Kaplinski <lauris@kaplinski.com>
   8  *
   9  * Copyright (C) 1999-2002 Lauris Kaplinski
  10  *
  11  * Released under GNU GPL, read the file 'COPYING' for more information
  12  */
  13
  14 #ifdef HAVE_CONFIG_H
  15 # include <config.h>
  16 #endif
  17 #include <map>
  18 #include <string>
  19 #include "display/guideline.h"
  20 #include "display/snap-indicator.h"
  21 #include "helper/unit-menu.h"
  22 #include "helper/units.h"
  23 #include "desktop.h"
  24 #include "document.h"
  25 #include "sp-guide.h"
  26 #include "sp-namedview.h"
  27 #include "desktop-handles.h"
  28 #include "event-context.h"
  29 #include "widgets/desktop-widget.h"
  30 #include "sp-metrics.h"
  31 #include <glibmm/i18n.h>
  32 #include "dialogs/dialog-events.h"
  33 #include "message-context.h"
  34 #include "xml/repr.h"
  35 #include "dialogs/guidelinedialog.h"
  36 #include "snap.h"
  37 #include "display/canvas-grid.h"
  38 #include "display/canvas-axonomgrid.h"
  39 #include "prefs-utils.h"
  40 #include "helper/action.h"
  41 #include "tools-switch.h"
  42 #include <2geom/point.h>
  43
  44 static void snoop_extended(GdkEvent* event, SPDesktop *desktop);
  45 static void init_extended();
  46
  47 /* Root item handler */
  48
  49 int sp_desktop_root_handler(SPCanvasItem */*item*/, GdkEvent *event, SPDesktop *desktop)
  50 {
  51     static bool watch = false;
  52     static bool first = true;
  53
  54     if ( first ) {
  55         if ( prefs_get_int_attribute("options.useextinput", "value", 1)
  56             && prefs_get_int_attribute("options.switchonextinput", "value", 0) ) {
  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     NR::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                 NR::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
  91                 NR::Point const event_dt(desktop->w2d(event_w));
  92
  93                 // explicitly show guidelines; if I draw a guide, I want them on
  94                 sp_repr_set_boolean(repr, "showguides", TRUE);
  95                 sp_repr_set_boolean(repr, "inkscape:guide-bbox", TRUE);
  96
  97                 // calculate the normal of the guidelines when dragged from the edges of rulers.
  98                 Geom::Point normal_bl_to_tr(-1.,1.); //bottomleft to topright
  99                 Geom::Point normal_tr_to_bl(1.,1.); //topright to bottomleft
 100                 normal_bl_to_tr.normalize();
 101                 normal_tr_to_bl.normalize();
 102                 Inkscape::CanvasGrid * grid = sp_namedview_get_first_enabled_grid(desktop->namedview);
 103                 if ( grid && grid->getGridType() == Inkscape::GRID_AXONOMETRIC ) {
 104                     Inkscape::CanvasAxonomGrid *axonomgrid = dynamic_cast<Inkscape::CanvasAxonomGrid *>(grid);
 105                     if (event->button.state & GDK_CONTROL_MASK) {
 106                         // guidelines normal to gridlines
 107                         normal_bl_to_tr = Geom::Point::polar(-axonomgrid->angle_rad[0], 1.0);
 108                         normal_tr_to_bl = Geom::Point::polar(axonomgrid->angle_rad[2], 1.0);
 109                     } else {
 110                         normal_bl_to_tr = rot90(Geom::Point::polar(axonomgrid->angle_rad[2], 1.0));
 111                         normal_tr_to_bl = rot90(Geom::Point::polar(-axonomgrid->angle_rad[0], 1.0));
 112                     }
 113                 }
 114                 if (horiz) {
 115                     if (wx < 50) {
 116                         normal = normal_bl_to_tr;
 117                     } else if (wx > width - 50) {
 118                         normal = normal_tr_to_bl;
 119                     } else {
 120                         normal = Geom::Point(0.,1.);
 121                     }
 122                 } else {
 123                     if (wy < 50) {
 124                         normal = normal_bl_to_tr;
 125                     } else if (wy > height - 50) {
 126                         normal = normal_tr_to_bl;
 127                     } else {
 128                         normal = Geom::Point(1.,0.);
 129                     }
 130                 }
 131
 132                 guide = sp_guideline_new(desktop->guides, event_dt.to_2geom(), normal);
 133                 sp_guideline_set_color(SP_GUIDELINE(guide), desktop->namedview->guidehicolor);
 134                 gdk_pointer_grab(widget->window, FALSE,
 135                                  (GdkEventMask)(GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK ),
 136                                  NULL, NULL,
 137                                  event->button.time);
 138             }
 139             break;
 140     case GDK_MOTION_NOTIFY:
 141             if (dragging) {
 142                 NR::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
 143                 NR::Point event_dt(desktop->w2d(event_w));
 144
 145                 SnapManager const &m = desktop->namedview->snap_manager;
 146                 Inkscape::SnappedPoint snappoint = m.guideSnap(event_dt, normal);
 147                 event_dt = snappoint.getPoint();
 148
 149                 sp_guideline_set_position(SP_GUIDELINE(guide), event_dt.to_2geom());
 150                 desktop->set_coordinate_status(event_dt);
 151                 desktop->setPosition (event_dt);
 152
 153                 if (snappoint.getDistance() < NR_HUGE) {
 154                     desktop->snapindicator->set_new_snappoint(snappoint.getPoint().to_2geom());
 155                 } else {
 156                     desktop->snapindicator->remove_snappoint();
 157                 }
 158             }
 159             break;
 160     case GDK_BUTTON_RELEASE:
 161             if (dragging && event->button.button == 1) {
 162                 gdk_pointer_ungrab(event->button.time);
 163                 NR::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
 164                 NR::Point event_dt(desktop->w2d(event_w));
 165
 166                 SnapManager const &m = desktop->namedview->snap_manager;
 167                 event_dt = m.guideSnap(event_dt, normal).getPoint();
 168
 169                 dragging = false;
 170                 gtk_object_destroy(GTK_OBJECT(guide));
 171                 guide = NULL;
 172                 if ((horiz ? wy : wx) >= 0) {
 173                     Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
 174                     Inkscape::XML::Node *repr = xml_doc->createElement("sodipodi:guide");
 175                     sp_repr_set_point(repr, "orientation", normal);
 176                     sp_repr_set_point(repr, "position", event_dt.to_2geom());
 177                     SP_OBJECT_REPR(desktop->namedview)->appendChild(repr);
 178                     Inkscape::GC::release(repr);
 179                     sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 180                                      _("Create guide"));
 181                 }
 182                 desktop->set_coordinate_status(event_dt);
 183             }
 184         default:
 185             break;
 186     }
 187
 188     return FALSE;
 189 }
 190
 191 int sp_dt_hruler_event(GtkWidget *widget, GdkEvent *event, SPDesktopWidget *dtw)
 192 {
 193     return sp_dt_ruler_event(widget, event, dtw, true);
 194 }
 195
 196 int sp_dt_vruler_event(GtkWidget *widget, GdkEvent *event, SPDesktopWidget *dtw)
 197 {
 198     return sp_dt_ruler_event(widget, event, dtw, false);
 199 }
 200
 201 /* Guides */
 202
 203 gint sp_dt_guide_event(SPCanvasItem *item, GdkEvent *event, gpointer data)
 204 {
 205     static bool dragging = false;
 206     static bool moved = false;
 207     gint ret = FALSE;
 208
 209     SPGuide *guide = SP_GUIDE(data);
 210     SPDesktop *desktop = static_cast<SPDesktop*>(gtk_object_get_data(GTK_OBJECT(item->canvas), "SPDesktop"));
 211
 212         switch (event->type) {
 213         case GDK_2BUTTON_PRESS:
 214             if (event->button.button == 1) {
 215                 dragging = false;
 216                 sp_canvas_item_ungrab(item, event->button.time);
 217                 Inkscape::UI::Dialogs::GuidelinePropertiesDialog::showDialog(guide, desktop);
 218                 ret = TRUE;
 219             }
 220             break;
 221         case GDK_BUTTON_PRESS:
 222             if (event->button.button == 1) {
 223                 if (event->button.state & GDK_CONTROL_MASK) {
 224                     SPDocument *doc = SP_OBJECT_DOCUMENT(guide);
 225                     sp_guide_remove(guide);
 226                     sp_document_done(doc, SP_VERB_NONE, _("Delete guide"));
 227                     ret = TRUE;
 228                     break;
 229                 }
 230                 dragging = true;
 231                 sp_canvas_item_grab(item,
 232                                     ( GDK_BUTTON_RELEASE_MASK  |
 233                                       GDK_BUTTON_PRESS_MASK    |
 234                                       GDK_POINTER_MOTION_MASK ),
 235                                     NULL,
 236                                     event->button.time);
 237                 ret = TRUE;
 238             }
 239             break;
 240     case GDK_MOTION_NOTIFY:
 241             if (dragging) {
 242                 NR::Point const motion_w(event->motion.x,
 243                                          event->motion.y);
 244                 NR::Point motion_dt(desktop->w2d(motion_w));
 245
 246                 // This is for snapping while dragging existing guidelines. New guidelines,
 247                 // which are dragged off the ruler, are being snapped in sp_dt_ruler_event
 248                 SnapManager const &m = desktop->namedview->snap_manager;
 249                 Inkscape::SnappedPoint snappoint = m.guideSnap(motion_dt, guide->normal_to_line);
 250                 motion_dt = snappoint.getPoint();
 251
 252                 sp_guide_moveto(*guide, motion_dt.to_2geom(), false);
 253                 moved = true;
 254                 desktop->set_coordinate_status(motion_dt);
 255                 desktop->setPosition (motion_dt);
 256
 257                 if (snappoint.getDistance() < NR_HUGE) {
 258                     desktop->snapindicator->set_new_snappoint(snappoint.getPoint().to_2geom());
 259                 } else {
 260                     desktop->snapindicator->remove_snappoint();
 261                 }
 262
 263                 ret = TRUE;
 264             }
 265             break;
 266     case GDK_BUTTON_RELEASE:
 267             if (dragging && event->button.button == 1) {
 268                 if (moved) {
 269                     NR::Point const event_w(event->button.x,
 270                                             event->button.y);
 271                     NR::Point event_dt(desktop->w2d(event_w));
 272
 273                     SnapManager const &m = desktop->namedview->snap_manager;
 274                     event_dt = m.guideSnap(event_dt, guide->normal_to_line).getPoint();
 275
 276                     if (sp_canvas_world_pt_inside_window(item->canvas, event_w)) {
 277                         sp_guide_moveto(*guide, event_dt.to_2geom(), true);
 278                         sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 279                                      _("Move guide"));
 280                     } else {
 281                         /* Undo movement of any attached shapes. */
 282                         sp_guide_moveto(*guide, guide->point_on_line, false);
 283                         sp_guide_remove(guide);
 284                         sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 285                                      _("Delete guide"));
 286                     }
 287                     moved = false;
 288                     desktop->set_coordinate_status(event_dt);
 289                     desktop->setPosition (event_dt);
 290                 }
 291                 dragging = false;
 292                 sp_canvas_item_ungrab(item, event->button.time);
 293                 ret=TRUE;
 294             }
 295     case GDK_ENTER_NOTIFY:
 296     {
 297             sp_guideline_set_color(SP_GUIDELINE(item), guide->hicolor);
 298
 299             char *guide_description = sp_guide_description(guide);
 300             desktop->guidesMessageContext()->setF(Inkscape::NORMAL_MESSAGE, _("<b>Guideline</b>: %s"), guide_description);
 301             g_free(guide_description);
 302             break;
 303     }
 304     case GDK_LEAVE_NOTIFY:
 305             sp_guideline_set_color(SP_GUIDELINE(item), guide->color);
 306             desktop->guidesMessageContext()->clear();
 307             break;
 308     default:
 309             break;
 310     }
 311
 312     return ret;
 313 }
 314
 315 static std::map<GdkInputSource, std::string> switchMap;
 316 static std::map<GdkInputSource, int> toolToUse;
 317 static std::string lastName;
 318 static GdkInputSource lastType = GDK_SOURCE_MOUSE;
 319
 320 static void init_extended()
 321 {
 322     std::string avoidName = "pad";
 323     GList* devices = gdk_devices_list();
 324     if ( devices ) {
 325         for ( GList* curr = devices; curr; curr = g_list_next(curr) ) {
 326             GdkDevice* dev = reinterpret_cast<GdkDevice*>(curr->data);
 327             if ( dev->name
 328                  && (avoidName != dev->name)
 329                  && (switchMap.find(dev->source) == switchMap.end())
 330                  && (dev->source != GDK_SOURCE_MOUSE) ) {
 331                 switchMap[dev->source] = dev->name;
 332 //                 g_message("Adding '%s' as [%d]", dev->name, dev->source);
 333
 334                 // Set the initial tool for the device
 335                 switch ( dev->source ) {
 336                     case GDK_SOURCE_PEN:
 337                         toolToUse[GDK_SOURCE_PEN] = TOOLS_CALLIGRAPHIC;
 338                         break;
 339                     case GDK_SOURCE_ERASER:
 340                         toolToUse[GDK_SOURCE_ERASER] = TOOLS_TWEAK;
 341                         break;
 342                     case GDK_SOURCE_CURSOR:
 343                         toolToUse[GDK_SOURCE_CURSOR] = TOOLS_SELECT;
 344                         break;
 345                     default:
 346                         ; // do not add
 347                 }
 348 //             } else {
 349 //                 g_message("Skippn '%s' as [%s]", dev->name, namefor(dev->source));
 350             }
 351         }
 352     }
 353 }
 354
 355
 356 void snoop_extended(GdkEvent* event, SPDesktop *desktop)
 357 {
 358     GdkInputSource source = GDK_SOURCE_MOUSE;
 359     std::string name;
 360
 361     switch ( event->type ) {
 362         case GDK_MOTION_NOTIFY:
 363         {
 364             GdkEventMotion* event2 = reinterpret_cast<GdkEventMotion*>(event);
 365             if ( event2->device ) {
 366                 source = event2->device->source;
 367                 name = event2->device->name;
 368             }
 369         }
 370         break;
 371
 372         case GDK_BUTTON_PRESS:
 373         case GDK_2BUTTON_PRESS:
 374         case GDK_3BUTTON_PRESS:
 375         case GDK_BUTTON_RELEASE:
 376         {
 377             GdkEventButton* event2 = reinterpret_cast<GdkEventButton*>(event);
 378             if ( event2->device ) {
 379                 source = event2->device->source;
 380                 name = event2->device->name;
 381             }
 382         }
 383         break;
 384
 385         case GDK_SCROLL:
 386         {
 387             GdkEventScroll* event2 = reinterpret_cast<GdkEventScroll*>(event);
 388             if ( event2->device ) {
 389                 source = event2->device->source;
 390                 name = event2->device->name;
 391             }
 392         }
 393         break;
 394
 395         case GDK_PROXIMITY_IN:
 396         case GDK_PROXIMITY_OUT:
 397         {
 398             GdkEventProximity* event2 = reinterpret_cast<GdkEventProximity*>(event);
 399             if ( event2->device ) {
 400                 source = event2->device->source;
 401                 name = event2->device->name;
 402             }
 403         }
 404         break;
 405
 406         default:
 407             ;
 408     }
 409
 410     if (!name.empty()) {
 411         if ( lastName != name || lastType != source ) {
 412             // The device switched. See if it is one we 'count'
 413             std::map<GdkInputSource, std::string>::iterator it = switchMap.find(source);
 414             if ( (it != switchMap.end()) && (name == it->second) ) {
 415                 std::map<GdkInputSource, int>::iterator it2 = toolToUse.find(source);
 416                 if (it2 != toolToUse.end() ) {
 417                     // Save the tool currently selected for next time the input device shows up.
 418                     if ( (switchMap.find(lastType) != switchMap.end())
 419                          && (lastName == switchMap.find(lastType)->second)) {
 420                         toolToUse[lastType] = tools_active(desktop);
 421                     }
 422                     tools_switch(desktop, it2->second);
 423                 }
 424                 lastName = name;
 425                 lastType = source;
 426             }
 427         }
 428     }
 429 }
 430
 431
 432
 433 /*
 434   Local Variables:
 435   mode:c++
 436   c-file-style:"stroustrup"
 437   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 438   indent-tabs-mode:nil
 439   fill-column:99
 440   End:
 441 */
 442 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :
 443