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 "preferences.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         Inkscape::Preferences *prefs = Inkscape::Preferences::get();
  56         if ( prefs->getBool("/options/useextinput/value", true)
  57             && prefs->getBool("/options/switchonextinput/value") ) {
  58             watch = true;
  59             init_extended();
  60         }
  61         first = false;
  62     }
  63     if ( watch ) {
  64         snoop_extended(event, desktop);
  65     }
  66
  67     return sp_event_context_root_handler(desktop->event_context, event);
  68 }
  69
  70
  71 static gint sp_dt_ruler_event(GtkWidget *widget, GdkEvent *event, SPDesktopWidget *dtw, bool horiz)
  72 {
  73     static bool dragging = false;
  74     static SPCanvasItem *guide = NULL;
  75     static Geom::Point normal;
  76     int wx, wy;
  77
  78     SPDesktop *desktop = dtw->desktop;
  79     Inkscape::XML::Node *repr = SP_OBJECT_REPR(desktop->namedview);
  80
  81     gdk_window_get_pointer(GTK_WIDGET(dtw->canvas)->window, &wx, &wy, NULL);
  82     Geom::Point const event_win(wx, wy);
  83
  84     gint width, height;
  85     gdk_window_get_geometry(GTK_WIDGET(dtw->canvas)->window, NULL /*x*/, NULL /*y*/, &width, &height, NULL/*depth*/);
  86
  87     switch (event->type) {
  88     case GDK_BUTTON_PRESS:
  89             if (event->button.button == 1) {
  90                 dragging = 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                 gtk_object_destroy(GTK_OBJECT(guide));
 167                 guide = NULL;
 168                 if ((horiz ? wy : wx) >= 0) {
 169                     Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
 170                     Inkscape::XML::Node *repr = xml_doc->createElement("sodipodi:guide");
 171                     sp_repr_set_point(repr, "orientation", normal);
 172                     sp_repr_set_point(repr, "position", from_2geom(event_dt));
 173                     SP_OBJECT_REPR(desktop->namedview)->appendChild(repr);
 174                     Inkscape::GC::release(repr);
 175                     sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 176                                      _("Create guide"));
 177                 }
 178                 desktop->set_coordinate_status(from_2geom(event_dt));
 179             }
 180         default:
 181             break;
 182     }
 183
 184     return FALSE;
 185 }
 186
 187 int sp_dt_hruler_event(GtkWidget *widget, GdkEvent *event, SPDesktopWidget *dtw)
 188 {
 189     return sp_dt_ruler_event(widget, event, dtw, true);
 190 }
 191
 192 int sp_dt_vruler_event(GtkWidget *widget, GdkEvent *event, SPDesktopWidget *dtw)
 193 {
 194     return sp_dt_ruler_event(widget, event, dtw, false);
 195 }
 196
 197 /* Guides */
 198
 199 gint sp_dt_guide_event(SPCanvasItem *item, GdkEvent *event, gpointer data)
 200 {
 201     static bool dragging = false;
 202     static bool moved = false;
 203     gint ret = FALSE;
 204
 205     SPGuide *guide = SP_GUIDE(data);
 206     SPDesktop *desktop = static_cast<SPDesktop*>(gtk_object_get_data(GTK_OBJECT(item->canvas), "SPDesktop"));
 207
 208         switch (event->type) {
 209         case GDK_2BUTTON_PRESS:
 210             if (event->button.button == 1) {
 211                 dragging = false;
 212                 sp_canvas_item_ungrab(item, event->button.time);
 213                 Inkscape::UI::Dialogs::GuidelinePropertiesDialog::showDialog(guide, desktop);
 214                 ret = TRUE;
 215             }
 216             break;
 217         case GDK_BUTTON_PRESS:
 218             if (event->button.button == 1) {
 219                 if (event->button.state & GDK_CONTROL_MASK) {
 220                     SPDocument *doc = SP_OBJECT_DOCUMENT(guide);
 221                     sp_guide_remove(guide);
 222                     sp_document_done(doc, SP_VERB_NONE, _("Delete guide"));
 223                     ret = TRUE;
 224                     break;
 225                 }
 226                 dragging = true;
 227                 sp_canvas_item_grab(item,
 228                                     ( GDK_BUTTON_RELEASE_MASK  |
 229                                       GDK_BUTTON_PRESS_MASK    |
 230                                       GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK ),
 231                                     NULL,
 232                                     event->button.time);
 233                 ret = TRUE;
 234             }
 235             break;
 236     case GDK_MOTION_NOTIFY:
 237             if (dragging) {
 238                 Geom::Point const motion_w(event->motion.x,
 239                                          event->motion.y);
 240                 Geom::Point motion_dt(to_2geom(desktop->w2d(from_2geom(motion_w))));
 241
 242                 // This is for snapping while dragging existing guidelines. New guidelines,
 243                 // which are dragged off the ruler, are being snapped in sp_dt_ruler_event
 244                 SnapManager &m = desktop->namedview->snap_manager;
 245                 m.setup(desktop);
 246                 m.guideSnap(motion_dt, to_2geom(guide->normal_to_line));
 247
 248                 sp_guide_moveto(*guide, from_2geom(motion_dt), false);
 249                 moved = true;
 250                 desktop->set_coordinate_status(from_2geom(motion_dt));
 251                 desktop->setPosition(from_2geom(motion_dt));
 252
 253                 ret = TRUE;
 254             }
 255             break;
 256     case GDK_BUTTON_RELEASE:
 257             if (dragging && event->button.button == 1) {
 258                 if (moved) {
 259                     Geom::Point const event_w(event->button.x,
 260                                               event->button.y);
 261                     Geom::Point event_dt(desktop->w2d(event_w));
 262
 263                     SnapManager &m = desktop->namedview->snap_manager;
 264                     m.setup(desktop);
 265                     m.guideSnap(event_dt, guide->normal_to_line);
 266
 267                     if (sp_canvas_world_pt_inside_window(item->canvas, event_w)) {
 268                         sp_guide_moveto(*guide, from_2geom(event_dt), true);
 269                         sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 270                                      _("Move guide"));
 271                     } else {
 272                         /* Undo movement of any attached shapes. */
 273                         sp_guide_moveto(*guide, guide->point_on_line, false);
 274                         sp_guide_remove(guide);
 275                         sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 276                                      _("Delete guide"));
 277                     }
 278                     moved = false;
 279                     desktop->set_coordinate_status(from_2geom(event_dt));
 280                     desktop->setPosition (from_2geom(event_dt));
 281                 }
 282                 dragging = false;
 283                 sp_canvas_item_ungrab(item, event->button.time);
 284                 ret=TRUE;
 285             }
 286     case GDK_ENTER_NOTIFY:
 287     {
 288             sp_guideline_set_color(SP_GUIDELINE(item), guide->hicolor);
 289
 290             char *guide_description = sp_guide_description(guide);
 291             desktop->guidesMessageContext()->setF(Inkscape::NORMAL_MESSAGE, _("<b>Guideline</b>: %s"), guide_description);
 292             g_free(guide_description);
 293             break;
 294     }
 295     case GDK_LEAVE_NOTIFY:
 296             sp_guideline_set_color(SP_GUIDELINE(item), guide->color);
 297             desktop->guidesMessageContext()->clear();
 298             break;
 299     default:
 300             break;
 301     }
 302
 303     return ret;
 304 }
 305
 306 static std::map<GdkInputSource, std::string> switchMap;
 307 static std::map<GdkInputSource, int> toolToUse;
 308 static std::string lastName;
 309 static GdkInputSource lastType = GDK_SOURCE_MOUSE;
 310
 311 static void init_extended()
 312 {
 313     std::string avoidName = "pad";
 314     GList* devices = gdk_devices_list();
 315     if ( devices ) {
 316         for ( GList* curr = devices; curr; curr = g_list_next(curr) ) {
 317             GdkDevice* dev = reinterpret_cast<GdkDevice*>(curr->data);
 318             if ( dev->name
 319                  && (avoidName != dev->name)
 320                  && (switchMap.find(dev->source) == switchMap.end())
 321                  && (dev->source != GDK_SOURCE_MOUSE) ) {
 322                 switchMap[dev->source] = dev->name;
 323 //                 g_message("Adding '%s' as [%d]", dev->name, dev->source);
 324
 325                 // Set the initial tool for the device
 326                 switch ( dev->source ) {
 327                     case GDK_SOURCE_PEN:
 328                         toolToUse[GDK_SOURCE_PEN] = TOOLS_CALLIGRAPHIC;
 329                         break;
 330                     case GDK_SOURCE_ERASER:
 331                         toolToUse[GDK_SOURCE_ERASER] = TOOLS_ERASER;
 332                         break;
 333                     case GDK_SOURCE_CURSOR:
 334                         toolToUse[GDK_SOURCE_CURSOR] = TOOLS_SELECT;
 335                         break;
 336                     default:
 337                         ; // do not add
 338                 }
 339 //             } else {
 340 //                 g_message("Skippn '%s' as [%s]", dev->name, namefor(dev->source));
 341             }
 342         }
 343     }
 344 }
 345
 346
 347 void snoop_extended(GdkEvent* event, SPDesktop *desktop)
 348 {
 349     GdkInputSource source = GDK_SOURCE_MOUSE;
 350     std::string name;
 351
 352     switch ( event->type ) {
 353         case GDK_MOTION_NOTIFY:
 354         {
 355             GdkEventMotion* event2 = reinterpret_cast<GdkEventMotion*>(event);
 356             if ( event2->device ) {
 357                 source = event2->device->source;
 358                 name = event2->device->name;
 359             }
 360         }
 361         break;
 362
 363         case GDK_BUTTON_PRESS:
 364         case GDK_2BUTTON_PRESS:
 365         case GDK_3BUTTON_PRESS:
 366         case GDK_BUTTON_RELEASE:
 367         {
 368             GdkEventButton* event2 = reinterpret_cast<GdkEventButton*>(event);
 369             if ( event2->device ) {
 370                 source = event2->device->source;
 371                 name = event2->device->name;
 372             }
 373         }
 374         break;
 375
 376         case GDK_SCROLL:
 377         {
 378             GdkEventScroll* event2 = reinterpret_cast<GdkEventScroll*>(event);
 379             if ( event2->device ) {
 380                 source = event2->device->source;
 381                 name = event2->device->name;
 382             }
 383         }
 384         break;
 385
 386         case GDK_PROXIMITY_IN:
 387         case GDK_PROXIMITY_OUT:
 388         {
 389             GdkEventProximity* event2 = reinterpret_cast<GdkEventProximity*>(event);
 390             if ( event2->device ) {
 391                 source = event2->device->source;
 392                 name = event2->device->name;
 393             }
 394         }
 395         break;
 396
 397         default:
 398             ;
 399     }
 400
 401     if (!name.empty()) {
 402         if ( lastName != name || lastType != source ) {
 403             // The device switched. See if it is one we 'count'
 404             std::map<GdkInputSource, std::string>::iterator it = switchMap.find(source);
 405             if ( (it != switchMap.end()) && (name == it->second) ) {
 406                 std::map<GdkInputSource, int>::iterator it2 = toolToUse.find(source);
 407                 if (it2 != toolToUse.end() ) {
 408                     // Save the tool currently selected for next time the input device shows up.
 409                     if ( (switchMap.find(lastType) != switchMap.end())
 410                          && (lastName == switchMap.find(lastType)->second)) {
 411                         toolToUse[lastType] = tools_active(desktop);
 412                     }
 413                     tools_switch(desktop, it2->second);
 414                 }
 415                 lastName = name;
 416                 lastType = source;
 417             }
 418         }
 419     }
 420 }
 421
 422
 423
 424 /*
 425   Local Variables:
 426   mode:c++
 427   c-file-style:"stroustrup"
 428   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 429   indent-tabs-mode:nil
 430   fill-column:99
 431   End:
 432 */
 433 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :
 434