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 "helper/unit-menu.h"
  21 #include "helper/units.h"
  22 #include "desktop.h"
  23 #include "document.h"
  24 #include "sp-guide.h"
  25 #include "sp-namedview.h"
  26 #include "desktop-handles.h"
  27 #include "event-context.h"
  28 #include "widgets/desktop-widget.h"
  29 #include "sp-metrics.h"
  30 #include <glibmm/i18n.h>
  31 #include "dialogs/dialog-events.h"
  32 #include "message-context.h"
  33 #include "xml/repr.h"
  34 #include "dialogs/guidelinedialog.h"
  35 #include "snap.h"
  36 #include "display/canvas-grid.h"
  37 #include "display/canvas-axonomgrid.h"
  38 #include "prefs-utils.h"
  39 #include "helper/action.h"
  40 #include "tools-switch.h"
  41 #include <2geom/point.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         if ( prefs_get_int_attribute("options.useextinput", "value", 1)
  55             && prefs_get_int_attribute("options.switchonextinput", "value", 0) ) {
  56             watch = true;
  57             init_extended();
  58         }
  59         first = false;
  60     }
  61     if ( watch ) {
  62         snoop_extended(event, desktop);
  63     }
  64
  65     return sp_event_context_root_handler(desktop->event_context, event);
  66 }
  67
  68
  69 static gint sp_dt_ruler_event(GtkWidget *widget, GdkEvent *event, SPDesktopWidget *dtw, bool horiz)
  70 {
  71     static bool dragging = false;
  72     static SPCanvasItem *guide = NULL;
  73     static Geom::Point normal;
  74     int wx, wy;
  75
  76     SPDesktop *desktop = dtw->desktop;
  77     Inkscape::XML::Node *repr = SP_OBJECT_REPR(desktop->namedview);
  78
  79     gdk_window_get_pointer(GTK_WIDGET(dtw->canvas)->window, &wx, &wy, NULL);
  80     NR::Point const event_win(wx, wy);
  81
  82     gint width, height;
  83     gdk_window_get_geometry(GTK_WIDGET(dtw->canvas)->window, NULL /*x*/, NULL /*y*/, &width, &height, NULL/*depth*/);
  84
  85     switch (event->type) {
  86     case GDK_BUTTON_PRESS:
  87             if (event->button.button == 1) {
  88                 dragging = true;
  89                 NR::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
  90                 NR::Point const event_dt(desktop->w2d(event_w));
  91
  92                 // explicitly show guidelines; if I draw a guide, I want them on
  93                 sp_repr_set_boolean(repr, "showguides", TRUE);
  94                 sp_repr_set_boolean(repr, "inkscape:guide-bbox", TRUE);
  95
  96                 // calculate the normal of the guidelines when dragged from the edges of rulers.
  97                 Geom::Point normal_bl_to_tr(-1.,1.); //bottomleft to topright
  98                 Geom::Point normal_tr_to_bl(1.,1.); //topright to bottomleft
  99                 normal_bl_to_tr.normalize();
 100                 normal_tr_to_bl.normalize();
 101                 Inkscape::CanvasGrid * grid = sp_namedview_get_first_enabled_grid(desktop->namedview);
 102                 if ( grid && grid->getGridType() == Inkscape::GRID_AXONOMETRIC ) {
 103                     Inkscape::CanvasAxonomGrid *axonomgrid = dynamic_cast<Inkscape::CanvasAxonomGrid *>(grid);
 104                     if (event->button.state & GDK_CONTROL_MASK) {
 105                         // guidelines normal to gridlines
 106                         normal_bl_to_tr = Geom::Point::polar(-axonomgrid->angle_rad[0], 1.0);
 107                         normal_tr_to_bl = Geom::Point::polar(axonomgrid->angle_rad[2], 1.0);
 108                     } else {
 109                         normal_bl_to_tr = rot90(Geom::Point::polar(axonomgrid->angle_rad[2], 1.0));
 110                         normal_tr_to_bl = rot90(Geom::Point::polar(-axonomgrid->angle_rad[0], 1.0));
 111                     }
 112                 }
 113                 if (horiz) {
 114                     if (wx < 50) {
 115                         normal = normal_bl_to_tr;
 116                     } else if (wx > width - 50) {
 117                         normal = normal_tr_to_bl;
 118                     } else {
 119                         normal = Geom::Point(0.,1.);
 120                     }
 121                 } else {
 122                     if (wy < 50) {
 123                         normal = normal_bl_to_tr;
 124                     } else if (wy > height - 50) {
 125                         normal = normal_tr_to_bl;
 126                     } else {
 127                         normal = Geom::Point(1.,0.);
 128                     }
 129                 }
 130
 131                 guide = sp_guideline_new(desktop->guides, event_dt.to_2geom(), normal);
 132                 sp_guideline_set_color(SP_GUIDELINE(guide), desktop->namedview->guidehicolor);
 133                 gdk_pointer_grab(widget->window, FALSE,
 134                                  (GdkEventMask)(GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK ),
 135                                  NULL, NULL,
 136                                  event->button.time);
 137             }
 138             break;
 139     case GDK_MOTION_NOTIFY:
 140             if (dragging) {
 141                 NR::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
 142                 NR::Point event_dt(desktop->w2d(event_w));
 143
 144                 SnapManager const &m = desktop->namedview->snap_manager;
 145                 event_dt = m.guideSnap(event_dt, normal).getPoint();
 146
 147                 sp_guideline_set_position(SP_GUIDELINE(guide), event_dt.to_2geom());
 148                 desktop->set_coordinate_status(event_dt);
 149                 desktop->setPosition (event_dt);
 150             }
 151             break;
 152     case GDK_BUTTON_RELEASE:
 153             if (dragging && event->button.button == 1) {
 154                 gdk_pointer_ungrab(event->button.time);
 155                 NR::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
 156                 NR::Point event_dt(desktop->w2d(event_w));
 157
 158                 SnapManager const &m = desktop->namedview->snap_manager;
 159                 event_dt = m.guideSnap(event_dt, normal).getPoint();
 160
 161                 dragging = false;
 162                 gtk_object_destroy(GTK_OBJECT(guide));
 163                 guide = NULL;
 164                 if ((horiz ? wy : wx) >= 0) {
 165                     Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
 166                     Inkscape::XML::Node *repr = xml_doc->createElement("sodipodi:guide");
 167                     sp_repr_set_point(repr, "orientation", normal);
 168                     sp_repr_set_point(repr, "position", event_dt.to_2geom());
 169                     SP_OBJECT_REPR(desktop->namedview)->appendChild(repr);
 170                     Inkscape::GC::release(repr);
 171                     sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 172                                      _("Create guide"));
 173                 }
 174                 desktop->set_coordinate_status(event_dt);
 175             }
 176         default:
 177             break;
 178     }
 179
 180     return FALSE;
 181 }
 182
 183 int sp_dt_hruler_event(GtkWidget *widget, GdkEvent *event, SPDesktopWidget *dtw)
 184 {
 185     return sp_dt_ruler_event(widget, event, dtw, true);
 186 }
 187
 188 int sp_dt_vruler_event(GtkWidget *widget, GdkEvent *event, SPDesktopWidget *dtw)
 189 {
 190     return sp_dt_ruler_event(widget, event, dtw, false);
 191 }
 192
 193 /* Guides */
 194
 195 gint sp_dt_guide_event(SPCanvasItem *item, GdkEvent *event, gpointer data)
 196 {
 197     static bool dragging = false;
 198     static bool moved = false;
 199     gint ret = FALSE;
 200
 201     SPGuide *guide = SP_GUIDE(data);
 202     SPDesktop *desktop = static_cast<SPDesktop*>(gtk_object_get_data(GTK_OBJECT(item->canvas), "SPDesktop"));
 203
 204         switch (event->type) {
 205         case GDK_2BUTTON_PRESS:
 206             if (event->button.button == 1) {
 207                 dragging = false;
 208                 sp_canvas_item_ungrab(item, event->button.time);
 209                 Inkscape::UI::Dialogs::GuidelinePropertiesDialog::showDialog(guide, desktop);
 210                 ret = TRUE;
 211             }
 212             break;
 213         case GDK_BUTTON_PRESS:
 214             if (event->button.button == 1) {
 215                 if (event->button.state & GDK_CONTROL_MASK) {
 216                     SPDocument *doc = SP_OBJECT_DOCUMENT(guide);
 217                     sp_guide_remove(guide);
 218                     sp_document_done(doc, SP_VERB_NONE, _("Delete guide"));
 219                     ret = TRUE;
 220                     break;
 221                 }
 222                 dragging = true;
 223                 sp_canvas_item_grab(item,
 224                                     ( GDK_BUTTON_RELEASE_MASK  |
 225                                       GDK_BUTTON_PRESS_MASK    |
 226                                       GDK_POINTER_MOTION_MASK ),
 227                                     NULL,
 228                                     event->button.time);
 229                 ret = TRUE;
 230             }
 231             break;
 232     case GDK_MOTION_NOTIFY:
 233             if (dragging) {
 234                 NR::Point const motion_w(event->motion.x,
 235                                          event->motion.y);
 236                 NR::Point motion_dt(desktop->w2d(motion_w));
 237
 238                 // This is for snapping while dragging existing guidelines. New guidelines,
 239                 // which are dragged off the ruler, are being snapped in sp_dt_ruler_event
 240                 SnapManager const &m = desktop->namedview->snap_manager;
 241                 motion_dt = m.guideSnap(motion_dt, guide->normal_to_line).getPoint();
 242
 243                 sp_guide_moveto(*guide, motion_dt.to_2geom(), false);
 244                 moved = true;
 245                 desktop->set_coordinate_status(motion_dt);
 246                 desktop->setPosition (motion_dt);
 247                 ret = TRUE;
 248             }
 249             break;
 250     case GDK_BUTTON_RELEASE:
 251             if (dragging && event->button.button == 1) {
 252                 if (moved) {
 253                     NR::Point const event_w(event->button.x,
 254                                             event->button.y);
 255                     NR::Point event_dt(desktop->w2d(event_w));
 256
 257                     SnapManager const &m = desktop->namedview->snap_manager;
 258                     event_dt = m.guideSnap(event_dt, guide->normal_to_line).getPoint();
 259
 260                     if (sp_canvas_world_pt_inside_window(item->canvas, event_w)) {
 261                         sp_guide_moveto(*guide, event_dt.to_2geom(), true);
 262                         sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 263                                      _("Move guide"));
 264                     } else {
 265                         /* Undo movement of any attached shapes. */
 266                         sp_guide_moveto(*guide, guide->point_on_line, false);
 267                         sp_guide_remove(guide);
 268                         sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 269                                      _("Delete guide"));
 270                     }
 271                     moved = false;
 272                     desktop->set_coordinate_status(event_dt);
 273                     desktop->setPosition (event_dt);
 274                 }
 275                 dragging = false;
 276                 sp_canvas_item_ungrab(item, event->button.time);
 277                 ret=TRUE;
 278             }
 279     case GDK_ENTER_NOTIFY:
 280     {
 281             sp_guideline_set_color(SP_GUIDELINE(item), guide->hicolor);
 282
 283             char *guide_description = sp_guide_description(guide);
 284             desktop->guidesMessageContext()->setF(Inkscape::NORMAL_MESSAGE, _("<b>Guideline</b>: %s"), guide_description);
 285             g_free(guide_description);
 286             break;
 287     }
 288     case GDK_LEAVE_NOTIFY:
 289             sp_guideline_set_color(SP_GUIDELINE(item), guide->color);
 290             desktop->guidesMessageContext()->clear();
 291             break;
 292     default:
 293             break;
 294     }
 295
 296     return ret;
 297 }
 298
 299 static std::map<GdkInputSource, std::string> switchMap;
 300 static std::map<GdkInputSource, int> toolToUse;
 301 static std::string lastName;
 302 static GdkInputSource lastType = GDK_SOURCE_MOUSE;
 303
 304 static void init_extended()
 305 {
 306     std::string avoidName = "pad";
 307     GList* devices = gdk_devices_list();
 308     if ( devices ) {
 309         for ( GList* curr = devices; curr; curr = g_list_next(curr) ) {
 310             GdkDevice* dev = reinterpret_cast<GdkDevice*>(curr->data);
 311             if ( dev->name
 312                  && (avoidName != dev->name)
 313                  && (switchMap.find(dev->source) == switchMap.end())
 314                  && (dev->source != GDK_SOURCE_MOUSE) ) {
 315                 switchMap[dev->source] = dev->name;
 316 //                 g_message("Adding '%s' as [%d]", dev->name, dev->source);
 317
 318                 // Set the initial tool for the device
 319                 switch ( dev->source ) {
 320                     case GDK_SOURCE_PEN:
 321                         toolToUse[GDK_SOURCE_PEN] = TOOLS_CALLIGRAPHIC;
 322                         break;
 323                     case GDK_SOURCE_ERASER:
 324                         toolToUse[GDK_SOURCE_ERASER] = TOOLS_TWEAK;
 325                         break;
 326                     case GDK_SOURCE_CURSOR:
 327                         toolToUse[GDK_SOURCE_CURSOR] = TOOLS_SELECT;
 328                         break;
 329                     default:
 330                         ; // do not add
 331                 }
 332 //             } else {
 333 //                 g_message("Skippn '%s' as [%s]", dev->name, namefor(dev->source));
 334             }
 335         }
 336     }
 337 }
 338
 339
 340 void snoop_extended(GdkEvent* event, SPDesktop *desktop)
 341 {
 342     GdkInputSource source = GDK_SOURCE_MOUSE;
 343     std::string name;
 344
 345     switch ( event->type ) {
 346         case GDK_MOTION_NOTIFY:
 347         {
 348             GdkEventMotion* event2 = reinterpret_cast<GdkEventMotion*>(event);
 349             if ( event2->device ) {
 350                 source = event2->device->source;
 351                 name = event2->device->name;
 352             }
 353         }
 354         break;
 355
 356         case GDK_BUTTON_PRESS:
 357         case GDK_2BUTTON_PRESS:
 358         case GDK_3BUTTON_PRESS:
 359         case GDK_BUTTON_RELEASE:
 360         {
 361             GdkEventButton* event2 = reinterpret_cast<GdkEventButton*>(event);
 362             if ( event2->device ) {
 363                 source = event2->device->source;
 364                 name = event2->device->name;
 365             }
 366         }
 367         break;
 368
 369         case GDK_SCROLL:
 370         {
 371             GdkEventScroll* event2 = reinterpret_cast<GdkEventScroll*>(event);
 372             if ( event2->device ) {
 373                 source = event2->device->source;
 374                 name = event2->device->name;
 375             }
 376         }
 377         break;
 378
 379         case GDK_PROXIMITY_IN:
 380         case GDK_PROXIMITY_OUT:
 381         {
 382             GdkEventProximity* event2 = reinterpret_cast<GdkEventProximity*>(event);
 383             if ( event2->device ) {
 384                 source = event2->device->source;
 385                 name = event2->device->name;
 386             }
 387         }
 388         break;
 389
 390         default:
 391             ;
 392     }
 393
 394     if (!name.empty()) {
 395         if ( lastName != name || lastType != source ) {
 396             // The device switched. See if it is one we 'count'
 397             std::map<GdkInputSource, std::string>::iterator it = switchMap.find(source);
 398             if ( (it != switchMap.end()) && (name == it->second) ) {
 399                 std::map<GdkInputSource, int>::iterator it2 = toolToUse.find(source);
 400                 if (it2 != toolToUse.end() ) {
 401                     // Save the tool currently selected for next time the input device shows up.
 402                     if ( (switchMap.find(lastType) != switchMap.end())
 403                          && (lastName == switchMap.find(lastType)->second)) {
 404                         toolToUse[lastType] = tools_active(desktop);
 405                     }
 406                     tools_switch(desktop, it2->second);
 407                 }
 408                 lastName = name;
 409                 lastType = source;
 410             }
 411         }
 412     }
 413 }
 414
 415
 416
 417 /*
 418   Local Variables:
 419   mode:c++
 420   c-file-style:"stroustrup"
 421   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 422   indent-tabs-mode:nil
 423   fill-column:99
 424   End:
 425 */
 426 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :
 427