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 "display/guideline.h"
  18 #include "helper/unit-menu.h"
  19 #include "helper/units.h"
  20 #include "desktop.h"
  21 #include "document.h"
  22 #include "sp-guide.h"
  23 #include "sp-namedview.h"
  24 #include "desktop-handles.h"
  25 #include "event-context.h"
  26 #include "widgets/desktop-widget.h"
  27 #include "sp-metrics.h"
  28 #include <glibmm/i18n.h>
  29 #include "dialogs/dialog-events.h"
  30 #include "message-context.h"
  31 #include "xml/repr.h"
  32 #include "dialogs/guidelinedialog.h"
  33 #include "snap.h"
  34 #include "display/canvas-grid.h"
  35 #include "display/canvas-axonomgrid.h"
  36 #include <2geom/point.h>
  37
  38 /* Root item handler */
  39
  40 int sp_desktop_root_handler(SPCanvasItem */*item*/, GdkEvent *event, SPDesktop *desktop)
  41 {
  42     return sp_event_context_root_handler(desktop->event_context, event);
  43 }
  44
  45
  46 static gint sp_dt_ruler_event(GtkWidget *widget, GdkEvent *event, SPDesktopWidget *dtw, bool horiz)
  47 {
  48     static bool dragging = false;
  49     static SPCanvasItem *guide = NULL;
  50     static Geom::Point normal;
  51     int wx, wy;
  52
  53     SPDesktop *desktop = dtw->desktop;
  54     Inkscape::XML::Node *repr = SP_OBJECT_REPR(desktop->namedview);
  55
  56     gdk_window_get_pointer(GTK_WIDGET(dtw->canvas)->window, &wx, &wy, NULL);
  57     NR::Point const event_win(wx, wy);
  58
  59     gint width, height;
  60     gdk_window_get_geometry(GTK_WIDGET(dtw->canvas)->window, NULL /*x*/, NULL /*y*/, &width, &height, NULL/*depth*/);
  61
  62     switch (event->type) {
  63     case GDK_BUTTON_PRESS:
  64             if (event->button.button == 1) {
  65                 dragging = true;
  66                 NR::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
  67                 NR::Point const event_dt(desktop->w2d(event_w));
  68
  69                 // explicitly show guidelines; if I draw a guide, I want them on
  70                 sp_repr_set_boolean(repr, "showguides", TRUE);
  71                 sp_repr_set_boolean(repr, "inkscape:guide-bbox", TRUE);
  72
  73                 // calculate the normal of the guidelines when dragged from the edges of rulers.
  74                 Geom::Point normal_bl_to_tr(-1.,1.); //bottomleft to topright
  75                 Geom::Point normal_tr_to_bl(1.,1.); //topright to bottomleft
  76                 normal_bl_to_tr.normalize();
  77                 normal_tr_to_bl.normalize();
  78                 Inkscape::CanvasGrid * grid = sp_namedview_get_first_enabled_grid(desktop->namedview);
  79                 if ( grid && grid->getGridType() == Inkscape::GRID_AXONOMETRIC ) {
  80                     Inkscape::CanvasAxonomGrid *axonomgrid = dynamic_cast<Inkscape::CanvasAxonomGrid *>(grid);
  81                     if (event->button.state & GDK_CONTROL_MASK) {
  82                         // guidelines normal to gridlines
  83                         normal_bl_to_tr = Geom::Point::polar(-axonomgrid->angle_rad[0], 1.0);
  84                         normal_tr_to_bl = Geom::Point::polar(axonomgrid->angle_rad[2], 1.0);
  85                     } else {
  86                         normal_bl_to_tr = rot90(Geom::Point::polar(axonomgrid->angle_rad[2], 1.0));
  87                         normal_tr_to_bl = rot90(Geom::Point::polar(-axonomgrid->angle_rad[0], 1.0));
  88                     }
  89                 }
  90                 if (horiz) {
  91                     if (wx < 50) {
  92                         normal = normal_bl_to_tr;
  93                     } else if (wx > width - 50) {
  94                         normal = normal_tr_to_bl;
  95                     } else {
  96                         normal = Geom::Point(0.,1.);
  97                     }
  98                 } else {
  99                     if (wy < 50) {
 100                         normal = normal_bl_to_tr;
 101                     } else if (wy > height - 50) {
 102                         normal = normal_tr_to_bl;
 103                     } else {
 104                         normal = Geom::Point(1.,0.);
 105                     }
 106                 }
 107
 108                 guide = sp_guideline_new(desktop->guides, event_dt.to_2geom(), normal);
 109                 sp_guideline_set_color(SP_GUIDELINE(guide), desktop->namedview->guidehicolor);
 110                 gdk_pointer_grab(widget->window, FALSE,
 111                                  (GdkEventMask)(GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK ),
 112                                  NULL, NULL,
 113                                  event->button.time);
 114             }
 115             break;
 116     case GDK_MOTION_NOTIFY:
 117             if (dragging) {
 118                 NR::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
 119                 NR::Point event_dt(desktop->w2d(event_w));
 120
 121                 SnapManager const &m = desktop->namedview->snap_manager;
 122                 event_dt = m.guideSnap(event_dt, normal).getPoint();
 123
 124                 sp_guideline_set_position(SP_GUIDELINE(guide), event_dt.to_2geom());
 125                 desktop->set_coordinate_status(event_dt);
 126                 desktop->setPosition (event_dt);
 127             }
 128             break;
 129     case GDK_BUTTON_RELEASE:
 130             if (dragging && event->button.button == 1) {
 131                 gdk_pointer_ungrab(event->button.time);
 132                 NR::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
 133                 NR::Point event_dt(desktop->w2d(event_w));
 134
 135                 SnapManager const &m = desktop->namedview->snap_manager;
 136                 event_dt = m.guideSnap(event_dt, normal).getPoint();
 137
 138                 dragging = false;
 139                 gtk_object_destroy(GTK_OBJECT(guide));
 140                 guide = NULL;
 141                 if ((horiz ? wy : wx) >= 0) {
 142                     Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
 143                     Inkscape::XML::Node *repr = xml_doc->createElement("sodipodi:guide");
 144                     sp_repr_set_point(repr, "orientation", normal);
 145                     sp_repr_set_point(repr, "position", event_dt.to_2geom());
 146                     SP_OBJECT_REPR(desktop->namedview)->appendChild(repr);
 147                     Inkscape::GC::release(repr);
 148                     sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 149                                      _("Create guide"));
 150                 }
 151                 desktop->set_coordinate_status(event_dt);
 152             }
 153         default:
 154             break;
 155     }
 156
 157     return FALSE;
 158 }
 159
 160 int sp_dt_hruler_event(GtkWidget *widget, GdkEvent *event, SPDesktopWidget *dtw)
 161 {
 162     return sp_dt_ruler_event(widget, event, dtw, true);
 163 }
 164
 165 int sp_dt_vruler_event(GtkWidget *widget, GdkEvent *event, SPDesktopWidget *dtw)
 166 {
 167     return sp_dt_ruler_event(widget, event, dtw, false);
 168 }
 169
 170 /* Guides */
 171
 172 gint sp_dt_guide_event(SPCanvasItem *item, GdkEvent *event, gpointer data)
 173 {
 174     static bool dragging = false;
 175     static bool moved = false;
 176     gint ret = FALSE;
 177
 178     SPGuide *guide = SP_GUIDE(data);
 179     SPDesktop *desktop = static_cast<SPDesktop*>(gtk_object_get_data(GTK_OBJECT(item->canvas), "SPDesktop"));
 180
 181         switch (event->type) {
 182         case GDK_2BUTTON_PRESS:
 183             if (event->button.button == 1) {
 184                 dragging = false;
 185                 sp_canvas_item_ungrab(item, event->button.time);
 186                 Inkscape::UI::Dialogs::GuidelinePropertiesDialog::showDialog(guide, desktop);
 187                 ret = TRUE;
 188             }
 189             break;
 190         case GDK_BUTTON_PRESS:
 191             if (event->button.button == 1) {
 192                 dragging = true;
 193                 sp_canvas_item_grab(item,
 194                                     ( GDK_BUTTON_RELEASE_MASK  |
 195                                       GDK_BUTTON_PRESS_MASK    |
 196                                       GDK_POINTER_MOTION_MASK ),
 197                                     NULL,
 198                                     event->button.time);
 199                 ret = TRUE;
 200             }
 201             break;
 202     case GDK_MOTION_NOTIFY:
 203             if (dragging) {
 204                 NR::Point const motion_w(event->motion.x,
 205                                          event->motion.y);
 206                 NR::Point motion_dt(desktop->w2d(motion_w));
 207
 208                 // This is for snapping while dragging existing guidelines. New guidelines,
 209                 // which are dragged off the ruler, are being snapped in sp_dt_ruler_event
 210                 SnapManager const &m = desktop->namedview->snap_manager;
 211                 motion_dt = m.guideSnap(motion_dt, guide->normal_to_line).getPoint();
 212
 213                 sp_guide_moveto(*guide, motion_dt.to_2geom(), false);
 214                 moved = true;
 215                 desktop->set_coordinate_status(motion_dt);
 216                 desktop->setPosition (motion_dt);
 217                 ret = TRUE;
 218             }
 219             break;
 220     case GDK_BUTTON_RELEASE:
 221             if (dragging && event->button.button == 1) {
 222                 if (moved) {
 223                     NR::Point const event_w(event->button.x,
 224                                             event->button.y);
 225                     NR::Point event_dt(desktop->w2d(event_w));
 226
 227                     SnapManager const &m = desktop->namedview->snap_manager;
 228                     event_dt = m.guideSnap(event_dt, guide->normal_to_line).getPoint();
 229
 230                     if (sp_canvas_world_pt_inside_window(item->canvas, event_w)) {
 231                         sp_guide_moveto(*guide, event_dt.to_2geom(), true);
 232                         sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 233                                      _("Move guide"));
 234                     } else {
 235                         /* Undo movement of any attached shapes. */
 236                         sp_guide_moveto(*guide, guide->point_on_line, false);
 237                         sp_guide_remove(guide);
 238                         sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 239                                      _("Delete guide"));
 240                     }
 241                     moved = false;
 242                     desktop->set_coordinate_status(event_dt);
 243                     desktop->setPosition (event_dt);
 244                 }
 245                 dragging = false;
 246                 sp_canvas_item_ungrab(item, event->button.time);
 247                 ret=TRUE;
 248             }
 249     case GDK_ENTER_NOTIFY:
 250     {
 251             sp_guideline_set_color(SP_GUIDELINE(item), guide->hicolor);
 252
 253             char *guide_description = sp_guide_description(guide);
 254             desktop->guidesMessageContext()->setF(Inkscape::NORMAL_MESSAGE, "%s", guide_description);
 255             g_free(guide_description);
 256             break;
 257     }
 258     case GDK_LEAVE_NOTIFY:
 259             sp_guideline_set_color(SP_GUIDELINE(item), guide->color);
 260             desktop->guidesMessageContext()->clear();
 261             break;
 262     default:
 263             break;
 264     }
 265
 266     return ret;
 267 }
 268
 269
 270 /*
 271   Local Variables:
 272   mode:c++
 273   c-file-style:"stroustrup"
 274   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 275   indent-tabs-mode:nil
 276   fill-column:99
 277   End:
 278 */
 279 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :
 280