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
  35 /* Root item handler */
  36
  37 int sp_desktop_root_handler(SPCanvasItem *item, GdkEvent *event, SPDesktop *desktop)
  38 {
  39     return sp_event_context_root_handler(desktop->event_context, event);
  40 }
  41
  42
  43 static gint sp_dt_ruler_event(GtkWidget *widget, GdkEvent *event, SPDesktopWidget *dtw, bool horiz)
  44 {
  45     static bool dragging = false;
  46     static SPCanvasItem *guide = NULL;
  47     int wx, wy;
  48
  49     SPDesktop *desktop = dtw->desktop;
  50     Inkscape::XML::Node *repr = SP_OBJECT_REPR(desktop->namedview);
  51
  52     gdk_window_get_pointer(GTK_WIDGET(dtw->canvas)->window, &wx, &wy, NULL);
  53     NR::Point const event_win(wx, wy);
  54
  55     switch (event->type) {
  56         case GDK_BUTTON_PRESS:
  57             if (event->button.button == 1) {
  58                 dragging = true;
  59                 NR::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
  60                 NR::Point const event_dt(desktop->w2d(event_w));
  61
  62                 // explicitly show guidelines; if I draw a guide, I want them on
  63                 sp_repr_set_boolean(repr, "showguides", TRUE);
  64                 sp_repr_set_boolean(repr, "inkscape:guide-bbox", TRUE);
  65
  66                 double const guide_pos_dt = event_dt[ horiz
  67                                                       ? NR::Y
  68                                                       : NR::X ];
  69                 guide = sp_guideline_new(desktop->guides, guide_pos_dt, !horiz);
  70                 sp_guideline_set_color(SP_GUIDELINE(guide), desktop->namedview->guidehicolor);
  71                 gdk_pointer_grab(widget->window, FALSE,
  72                                  (GdkEventMask)(GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK ),
  73                                  NULL, NULL,
  74                                  event->button.time);
  75             }
  76             break;
  77         case GDK_MOTION_NOTIFY:
  78             if (dragging) {
  79                 NR::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
  80                 NR::Point event_dt(desktop->w2d(event_w));
  81
  82                 SnapManager const &m = desktop->namedview->snap_manager;
  83                 event_dt = m.guideSnap(event_dt, component_vectors[horiz ? NR::Y : NR::X]).getPoint();
  84
  85                 double const guide_pos_dt = event_dt[ horiz
  86                                                       ? NR::Y
  87                                                       : NR::X ];
  88
  89                 sp_guideline_set_position(SP_GUIDELINE(guide), guide_pos_dt);
  90                 desktop->set_coordinate_status(event_dt);
  91                 desktop->setPosition (event_dt);
  92             }
  93             break;
  94         case GDK_BUTTON_RELEASE:
  95             if (dragging && event->button.button == 1) {
  96                 gdk_pointer_ungrab(event->button.time);
  97                 NR::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
  98                 NR::Point const event_dt(desktop->w2d(event_w));
  99                 dragging = false;
 100                 gtk_object_destroy(GTK_OBJECT(guide));
 101                 guide = NULL;
 102                 if ( ( horiz
 103                        ? wy
 104                        : wx )
 105                      >= 0 )
 106                 {
 107                     Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
 108                     Inkscape::XML::Node *repr = xml_doc->createElement("sodipodi:guide");
 109                     repr->setAttribute("orientation", (horiz) ? "horizontal" : "vertical");
 110                     double const guide_pos_dt = event_dt[ horiz
 111                                                           ? NR::Y
 112                                                           : NR::X ];
 113                     sp_repr_set_svg_double(repr, "position", guide_pos_dt);
 114                     SP_OBJECT_REPR(desktop->namedview)->appendChild(repr);
 115                     Inkscape::GC::release(repr);
 116                     sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 117                                      _("Create guide"));
 118                 }
 119                 desktop->set_coordinate_status(event_dt);
 120             }
 121         default:
 122             break;
 123     }
 124
 125     return FALSE;
 126 }
 127
 128 int sp_dt_hruler_event(GtkWidget *widget, GdkEvent *event, SPDesktopWidget *dtw)
 129 {
 130     return sp_dt_ruler_event(widget, event, dtw, true);
 131 }
 132
 133 int sp_dt_vruler_event(GtkWidget *widget, GdkEvent *event, SPDesktopWidget *dtw)
 134 {
 135     return sp_dt_ruler_event(widget, event, dtw, false);
 136 }
 137
 138 /* Guides */
 139
 140 gint sp_dt_guide_event(SPCanvasItem *item, GdkEvent *event, gpointer data)
 141 {
 142     static bool dragging = false;
 143     static bool moved = false;
 144     gint ret = FALSE;
 145
 146     SPGuide *guide = SP_GUIDE(data);
 147     SPDesktop *desktop = static_cast<SPDesktop*>(gtk_object_get_data(GTK_OBJECT(item->canvas), "SPDesktop"));
 148
 149         switch (event->type) {
 150         case GDK_2BUTTON_PRESS:
 151             if (event->button.button == 1) {
 152                 dragging = false;
 153                 sp_canvas_item_ungrab(item, event->button.time);
 154                 Inkscape::UI::Dialogs::GuidelinePropertiesDialog::showDialog(guide, desktop);
 155                 ret = TRUE;
 156             }
 157             break;
 158         case GDK_BUTTON_PRESS:
 159             if (event->button.button == 1) {
 160                 dragging = true;
 161                 sp_canvas_item_grab(item,
 162                                     ( GDK_BUTTON_RELEASE_MASK  |
 163                                       GDK_BUTTON_PRESS_MASK    |
 164                                       GDK_POINTER_MOTION_MASK ),
 165                                     NULL,
 166                                     event->button.time);
 167                 ret = TRUE;
 168             }
 169             break;
 170         case GDK_MOTION_NOTIFY:
 171             if (dragging) {
 172                 NR::Point const motion_w(event->motion.x,
 173                                          event->motion.y);
 174                 NR::Point motion_dt(desktop->w2d(motion_w));
 175
 176                 // This is for snapping while dragging existing guidelines. New guidelines,
 177                 // which are dragged off the ruler, are being snapped in sp_dt_ruler_event
 178                 SnapManager const &m = desktop->namedview->snap_manager;
 179                 motion_dt = m.guideSnap(motion_dt, guide->normal).getPoint();
 180
 181                 sp_guide_moveto(*guide, sp_guide_position_from_pt(guide, motion_dt), false);
 182                 moved = true;
 183                 desktop->set_coordinate_status(motion_dt);
 184                 desktop->setPosition (motion_dt);
 185                 ret = TRUE;
 186             }
 187             break;
 188         case GDK_BUTTON_RELEASE:
 189             if (dragging && event->button.button == 1) {
 190                 if (moved) {
 191                     NR::Point const event_w(event->button.x,
 192                                             event->button.y);
 193                     NR::Point event_dt(desktop->w2d(event_w));
 194
 195                     //If we don't snap here again, it will end up at the current mouse position
 196                     //whereas it might have been at a snapped position a millisecond before.
 197                     //See GDK_MOTION_NOTIFY above. Why's that????
 198                     SnapManager const &m = desktop->namedview->snap_manager;
 199                         event_dt = m.guideSnap(event_dt, guide->normal).getPoint();
 200
 201                     if (sp_canvas_world_pt_inside_window(item->canvas, event_w)) {
 202                         sp_guide_moveto(*guide, sp_guide_position_from_pt(guide, event_dt), true);
 203                         sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 204                                      _("Move guide"));
 205                     } else {
 206                         /* Undo movement of any attached shapes. */
 207                         sp_guide_moveto(*guide, guide->position, false);
 208                         sp_guide_remove(guide);
 209                         sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 210                                      _("Delete guide"));
 211                     }
 212                     moved = false;
 213                     desktop->set_coordinate_status(event_dt);
 214                     desktop->setPosition (event_dt);
 215                 }
 216                 dragging = false;
 217                 sp_canvas_item_ungrab(item, event->button.time);
 218                 ret=TRUE;
 219             }
 220         case GDK_ENTER_NOTIFY:
 221         {
 222
 223             sp_guideline_set_color(SP_GUIDELINE(item), guide->hicolor);
 224
 225             GString *position_string = SP_PX_TO_METRIC_STRING(guide->position, desktop->namedview->getDefaultMetric());
 226             char *guide_description = sp_guide_description(guide);
 227
 228             desktop->guidesMessageContext()->setF(Inkscape::NORMAL_MESSAGE, _("%s at %s"), guide_description, position_string->str);
 229
 230             g_free(guide_description);
 231             g_string_free(position_string, TRUE);
 232             break;
 233         }
 234         case GDK_LEAVE_NOTIFY:
 235             sp_guideline_set_color(SP_GUIDELINE(item), guide->color);
 236             desktop->guidesMessageContext()->clear();
 237             break;
 238         default:
 239             break;
 240     }
 241
 242     return ret;
 243 }
 244
 245
 246 /*
 247   Local Variables:
 248   mode:c++
 249   c-file-style:"stroustrup"
 250   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 251   indent-tabs-mode:nil
 252   fill-column:99
 253   End:
 254 */
 255 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :
 256