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     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                 Geom::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
  91                 Geom::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, 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                 Geom::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
 143                 Geom::Point event_dt(desktop->w2d(event_w));
 144
 145                 SnapManager &m = desktop->namedview->snap_manager;
 146                 m.setup(desktop);
 147                 m.guideSnap(event_dt, normal);
 148
 149                 sp_guideline_set_position(SP_GUIDELINE(guide), from_2geom(event_dt));
 150                 desktop->set_coordinate_status(to_2geom(event_dt));
 151                 desktop->setPosition(to_2geom(event_dt));
 152             }
 153             break;
 154     case GDK_BUTTON_RELEASE:
 155             if (dragging && event->button.button == 1) {
 156                 gdk_pointer_ungrab(event->button.time);
 157                 Geom::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
 158                 Geom::Point event_dt(desktop->w2d(event_w));
 159
 160                 SnapManager &m = desktop->namedview->snap_manager;
 161                 m.setup(desktop);
 162                 m.guideSnap(event_dt, normal);
 163
 164                 dragging = false;
 165                 gtk_object_destroy(GTK_OBJECT(guide));
 166                 guide = NULL;
 167                 if ((horiz ? wy : wx) >= 0) {
 168                     Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
 169                     Inkscape::XML::Node *repr = xml_doc->createElement("sodipodi:guide");
 170                     sp_repr_set_point(repr, "orientation", normal);
 171                     sp_repr_set_point(repr, "position", from_2geom(event_dt));
 172                     SP_OBJECT_REPR(desktop->namedview)->appendChild(repr);
 173                     Inkscape::GC::release(repr);
 174                     sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 175                                      _("Create guide"));
 176                 }
 177                 desktop->set_coordinate_status(from_2geom(event_dt));
 178             }
 179         default:
 180             break;
 181     }
 182
 183     return FALSE;
 184 }
 185
 186 int sp_dt_hruler_event(GtkWidget *widget, GdkEvent *event, SPDesktopWidget *dtw)
 187 {
 188     return sp_dt_ruler_event(widget, event, dtw, true);
 189 }
 190
 191 int sp_dt_vruler_event(GtkWidget *widget, GdkEvent *event, SPDesktopWidget *dtw)
 192 {
 193     return sp_dt_ruler_event(widget, event, dtw, false);
 194 }
 195
 196 /* Guides */
 197
 198 gint sp_dt_guide_event(SPCanvasItem *item, GdkEvent *event, gpointer data)
 199 {
 200     static bool dragging = false;
 201     static bool moved = false;
 202     gint ret = FALSE;
 203
 204     SPGuide *guide = SP_GUIDE(data);
 205     SPDesktop *desktop = static_cast<SPDesktop*>(gtk_object_get_data(GTK_OBJECT(item->canvas), "SPDesktop"));
 206
 207         switch (event->type) {
 208         case GDK_2BUTTON_PRESS:
 209             if (event->button.button == 1) {
 210                 dragging = false;
 211                 sp_canvas_item_ungrab(item, event->button.time);
 212                 Inkscape::UI::Dialogs::GuidelinePropertiesDialog::showDialog(guide, desktop);
 213                 ret = TRUE;
 214             }
 215             break;
 216         case GDK_BUTTON_PRESS:
 217             if (event->button.button == 1) {
 218                 if (event->button.state & GDK_CONTROL_MASK) {
 219                     SPDocument *doc = SP_OBJECT_DOCUMENT(guide);
 220                     sp_guide_remove(guide);
 221                     sp_document_done(doc, SP_VERB_NONE, _("Delete guide"));
 222                     ret = TRUE;
 223                     break;
 224                 }
 225                 dragging = true;
 226                 sp_canvas_item_grab(item,
 227                                     ( GDK_BUTTON_RELEASE_MASK  |
 228                                       GDK_BUTTON_PRESS_MASK    |
 229                                       GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK ),
 230                                     NULL,
 231                                     event->button.time);
 232                 ret = TRUE;
 233             }
 234             break;
 235     case GDK_MOTION_NOTIFY:
 236             if (dragging) {
 237                 Geom::Point const motion_w(event->motion.x,
 238                                          event->motion.y);
 239                 Geom::Point motion_dt(to_2geom(desktop->w2d(from_2geom(motion_w))));
 240
 241                 // This is for snapping while dragging existing guidelines. New guidelines,
 242                 // which are dragged off the ruler, are being snapped in sp_dt_ruler_event
 243                 SnapManager &m = desktop->namedview->snap_manager;
 244                 m.setup(desktop);
 245                 m.guideSnap(motion_dt, to_2geom(guide->normal_to_line));
 246
 247                 sp_guide_moveto(*guide, from_2geom(motion_dt), false);
 248                 moved = true;
 249                 desktop->set_coordinate_status(from_2geom(motion_dt));
 250                 desktop->setPosition(from_2geom(motion_dt));
 251
 252                 ret = TRUE;
 253             }
 254             break;
 255     case GDK_BUTTON_RELEASE:
 256             if (dragging && event->button.button == 1) {
 257                 if (moved) {
 258                     Geom::Point const event_w(event->button.x,
 259                                               event->button.y);
 260                     Geom::Point event_dt(desktop->w2d(event_w));
 261
 262                     SnapManager &m = desktop->namedview->snap_manager;
 263                     m.setup(desktop);
 264                     m.guideSnap(event_dt, guide->normal_to_line);
 265
 266                     if (sp_canvas_world_pt_inside_window(item->canvas, event_w)) {
 267                         sp_guide_moveto(*guide, from_2geom(event_dt), true);
 268                         sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 269                                      _("Move guide"));
 270                     } else {
 271                         /* Undo movement of any attached shapes. */
 272                         sp_guide_moveto(*guide, guide->point_on_line, false);
 273                         sp_guide_remove(guide);
 274                         sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 275                                      _("Delete guide"));
 276                     }
 277                     moved = false;
 278                     desktop->set_coordinate_status(from_2geom(event_dt));
 279                     desktop->setPosition (from_2geom(event_dt));
 280                 }
 281                 dragging = false;
 282                 sp_canvas_item_ungrab(item, event->button.time);
 283                 ret=TRUE;
 284             }
 285     case GDK_ENTER_NOTIFY:
 286     {
 287             sp_guideline_set_color(SP_GUIDELINE(item), guide->hicolor);
 288
 289             char *guide_description = sp_guide_description(guide);
 290             desktop->guidesMessageContext()->setF(Inkscape::NORMAL_MESSAGE, _("<b>Guideline</b>: %s"), guide_description);
 291             g_free(guide_description);
 292             break;
 293     }
 294     case GDK_LEAVE_NOTIFY:
 295             sp_guideline_set_color(SP_GUIDELINE(item), guide->color);
 296             desktop->guidesMessageContext()->clear();
 297             break;
 298     default:
 299             break;
 300     }
 301
 302     return ret;
 303 }
 304
 305 static std::map<GdkInputSource, std::string> switchMap;
 306 static std::map<GdkInputSource, int> toolToUse;
 307 static std::string lastName;
 308 static GdkInputSource lastType = GDK_SOURCE_MOUSE;
 309
 310 static void init_extended()
 311 {
 312     std::string avoidName = "pad";
 313     GList* devices = gdk_devices_list();
 314     if ( devices ) {
 315         for ( GList* curr = devices; curr; curr = g_list_next(curr) ) {
 316             GdkDevice* dev = reinterpret_cast<GdkDevice*>(curr->data);
 317             if ( dev->name
 318                  && (avoidName != dev->name)
 319                  && (switchMap.find(dev->source) == switchMap.end())
 320                  && (dev->source != GDK_SOURCE_MOUSE) ) {
 321                 switchMap[dev->source] = dev->name;
 322 //                 g_message("Adding '%s' as [%d]", dev->name, dev->source);
 323
 324                 // Set the initial tool for the device
 325                 switch ( dev->source ) {
 326                     case GDK_SOURCE_PEN:
 327                         toolToUse[GDK_SOURCE_PEN] = TOOLS_CALLIGRAPHIC;
 328                         break;
 329                     case GDK_SOURCE_ERASER:
 330                         toolToUse[GDK_SOURCE_ERASER] = TOOLS_ERASER;
 331                         break;
 332                     case GDK_SOURCE_CURSOR:
 333                         toolToUse[GDK_SOURCE_CURSOR] = TOOLS_SELECT;
 334                         break;
 335                     default:
 336                         ; // do not add
 337                 }
 338 //             } else {
 339 //                 g_message("Skippn '%s' as [%s]", dev->name, namefor(dev->source));
 340             }
 341         }
 342     }
 343 }
 344
 345
 346 void snoop_extended(GdkEvent* event, SPDesktop *desktop)
 347 {
 348     GdkInputSource source = GDK_SOURCE_MOUSE;
 349     std::string name;
 350
 351     switch ( event->type ) {
 352         case GDK_MOTION_NOTIFY:
 353         {
 354             GdkEventMotion* event2 = reinterpret_cast<GdkEventMotion*>(event);
 355             if ( event2->device ) {
 356                 source = event2->device->source;
 357                 name = event2->device->name;
 358             }
 359         }
 360         break;
 361
 362         case GDK_BUTTON_PRESS:
 363         case GDK_2BUTTON_PRESS:
 364         case GDK_3BUTTON_PRESS:
 365         case GDK_BUTTON_RELEASE:
 366         {
 367             GdkEventButton* event2 = reinterpret_cast<GdkEventButton*>(event);
 368             if ( event2->device ) {
 369                 source = event2->device->source;
 370                 name = event2->device->name;
 371             }
 372         }
 373         break;
 374
 375         case GDK_SCROLL:
 376         {
 377             GdkEventScroll* event2 = reinterpret_cast<GdkEventScroll*>(event);
 378             if ( event2->device ) {
 379                 source = event2->device->source;
 380                 name = event2->device->name;
 381             }
 382         }
 383         break;
 384
 385         case GDK_PROXIMITY_IN:
 386         case GDK_PROXIMITY_OUT:
 387         {
 388             GdkEventProximity* event2 = reinterpret_cast<GdkEventProximity*>(event);
 389             if ( event2->device ) {
 390                 source = event2->device->source;
 391                 name = event2->device->name;
 392             }
 393         }
 394         break;
 395
 396         default:
 397             ;
 398     }
 399
 400     if (!name.empty()) {
 401         if ( lastName != name || lastType != source ) {
 402             // The device switched. See if it is one we 'count'
 403             std::map<GdkInputSource, std::string>::iterator it = switchMap.find(source);
 404             if ( (it != switchMap.end()) && (name == it->second) ) {
 405                 std::map<GdkInputSource, int>::iterator it2 = toolToUse.find(source);
 406                 if (it2 != toolToUse.end() ) {
 407                     // Save the tool currently selected for next time the input device shows up.
 408                     if ( (switchMap.find(lastType) != switchMap.end())
 409                          && (lastName == switchMap.find(lastType)->second)) {
 410                         toolToUse[lastType] = tools_active(desktop);
 411                     }
 412                     tools_switch(desktop, it2->second);
 413                 }
 414                 lastName = name;
 415                 lastType = source;
 416             }
 417         }
 418     }
 419 }
 420
 421
 422
 423 /*
 424   Local Variables:
 425   mode:c++
 426   c-file-style:"stroustrup"
 427   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 428   indent-tabs-mode:nil
 429   fill-column:99
 430   End:
 431 */
 432 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :
 433