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     static Geom::Point normal;
  48     int wx, wy;
  49
  50     SPDesktop *desktop = dtw->desktop;
  51     Inkscape::XML::Node *repr = SP_OBJECT_REPR(desktop->namedview);
  52
  53     gdk_window_get_pointer(GTK_WIDGET(dtw->canvas)->window, &wx, &wy, NULL);
  54     NR::Point const event_win(wx, wy);
  55
  56     switch (event->type) {
  57         case GDK_BUTTON_PRESS:
  58             if (event->button.button == 1) {
  59                 dragging = true;
  60                 NR::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
  61                 NR::Point const event_dt(desktop->w2d(event_w));
  62
  63                 // explicitly show guidelines; if I draw a guide, I want them on
  64                 sp_repr_set_boolean(repr, "showguides", TRUE);
  65                 sp_repr_set_boolean(repr, "inkscape:guide-bbox", TRUE);
  66
  67                 normal = horiz ? Geom::Point(0.,1.) : Geom::Point(1.,0.);
  68                 guide = sp_guideline_new(desktop->guides, event_dt.to_2geom(), normal);
  69                 sp_guideline_set_color(SP_GUIDELINE(guide), desktop->namedview->guidehicolor);
  70                 gdk_pointer_grab(widget->window, FALSE,
  71                                  (GdkEventMask)(GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK ),
  72                                  NULL, NULL,
  73                                  event->button.time);
  74             }
  75             break;
  76         case GDK_MOTION_NOTIFY:
  77             if (dragging) {
  78                 NR::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
  79                 NR::Point event_dt(desktop->w2d(event_w));
  80
  81                 SnapManager const &m = desktop->namedview->snap_manager;
  82                 event_dt = m.guideSnap(event_dt, normal).getPoint();
  83
  84                 sp_guideline_set_position(SP_GUIDELINE(guide), event_dt.to_2geom());
  85                 desktop->set_coordinate_status(event_dt);
  86                 desktop->setPosition (event_dt);
  87             }
  88             break;
  89         case GDK_BUTTON_RELEASE:
  90             if (dragging && event->button.button == 1) {
  91                 gdk_pointer_ungrab(event->button.time);
  92                 NR::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
  93                 NR::Point event_dt(desktop->w2d(event_w));
  94
  95                 SnapManager const &m = desktop->namedview->snap_manager;
  96                 event_dt = m.guideSnap(event_dt, normal).getPoint();
  97
  98                 dragging = false;
  99                 gtk_object_destroy(GTK_OBJECT(guide));
 100                 guide = NULL;
 101                 if ((horiz ? wy : wx) >= 0) {
 102                     Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
 103                     Inkscape::XML::Node *repr = xml_doc->createElement("sodipodi:guide");
 104                     sp_repr_set_point(repr, "orientation", normal);
 105                     sp_repr_set_point(repr, "position", event_dt.to_2geom());
 106                     SP_OBJECT_REPR(desktop->namedview)->appendChild(repr);
 107                     Inkscape::GC::release(repr);
 108                     sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 109                                      _("Create guide"));
 110                 }
 111                 desktop->set_coordinate_status(event_dt);
 112             }
 113         default:
 114             break;
 115     }
 116
 117     return FALSE;
 118 }
 119
 120 int sp_dt_hruler_event(GtkWidget *widget, GdkEvent *event, SPDesktopWidget *dtw)
 121 {
 122     return sp_dt_ruler_event(widget, event, dtw, true);
 123 }
 124
 125 int sp_dt_vruler_event(GtkWidget *widget, GdkEvent *event, SPDesktopWidget *dtw)
 126 {
 127     return sp_dt_ruler_event(widget, event, dtw, false);
 128 }
 129
 130 /* Guides */
 131
 132 gint sp_dt_guide_event(SPCanvasItem *item, GdkEvent *event, gpointer data)
 133 {
 134     static bool dragging = false;
 135     static bool moved = false;
 136     gint ret = FALSE;
 137
 138     SPGuide *guide = SP_GUIDE(data);
 139     SPDesktop *desktop = static_cast<SPDesktop*>(gtk_object_get_data(GTK_OBJECT(item->canvas), "SPDesktop"));
 140
 141         switch (event->type) {
 142         case GDK_2BUTTON_PRESS:
 143             if (event->button.button == 1) {
 144                 dragging = false;
 145                 sp_canvas_item_ungrab(item, event->button.time);
 146                 Inkscape::UI::Dialogs::GuidelinePropertiesDialog::showDialog(guide, desktop);
 147                 ret = TRUE;
 148             }
 149             break;
 150         case GDK_BUTTON_PRESS:
 151             if (event->button.button == 1) {
 152                 dragging = true;
 153                 sp_canvas_item_grab(item,
 154                                     ( GDK_BUTTON_RELEASE_MASK  |
 155                                       GDK_BUTTON_PRESS_MASK    |
 156                                       GDK_POINTER_MOTION_MASK ),
 157                                     NULL,
 158                                     event->button.time);
 159                 ret = TRUE;
 160             }
 161             break;
 162     case GDK_MOTION_NOTIFY:
 163             if (dragging) {
 164                 NR::Point const motion_w(event->motion.x,
 165                                          event->motion.y);
 166                 NR::Point motion_dt(desktop->w2d(motion_w));
 167
 168                 // This is for snapping while dragging existing guidelines. New guidelines,
 169                 // which are dragged off the ruler, are being snapped in sp_dt_ruler_event
 170                 SnapManager const &m = desktop->namedview->snap_manager;
 171                 motion_dt = m.guideSnap(motion_dt, guide->normal_to_line).getPoint();
 172
 173                 sp_guide_moveto(*guide, motion_dt.to_2geom(), false);
 174                 moved = true;
 175                 desktop->set_coordinate_status(motion_dt);
 176                 desktop->setPosition (motion_dt);
 177                 ret = TRUE;
 178             }
 179             break;
 180     case GDK_BUTTON_RELEASE:
 181             if (dragging && event->button.button == 1) {
 182                 if (moved) {
 183                     NR::Point const event_w(event->button.x,
 184                                             event->button.y);
 185                     NR::Point event_dt(desktop->w2d(event_w));
 186
 187                     SnapManager const &m = desktop->namedview->snap_manager;
 188                     event_dt = m.guideSnap(event_dt, guide->normal_to_line).getPoint();
 189
 190                     if (sp_canvas_world_pt_inside_window(item->canvas, event_w)) {
 191                         sp_guide_moveto(*guide, event_dt.to_2geom(), true);
 192                         sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 193                                      _("Move guide"));
 194                     } else {
 195                         /* Undo movement of any attached shapes. */
 196                         sp_guide_moveto(*guide, guide->point_on_line, false);
 197                         sp_guide_remove(guide);
 198                         sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 199                                      _("Delete guide"));
 200                     }
 201                     moved = false;
 202                     desktop->set_coordinate_status(event_dt);
 203                     desktop->setPosition (event_dt);
 204                 }
 205                 dragging = false;
 206                 sp_canvas_item_ungrab(item, event->button.time);
 207                 ret=TRUE;
 208             }
 209     case GDK_ENTER_NOTIFY:
 210     {
 211             sp_guideline_set_color(SP_GUIDELINE(item), guide->hicolor);
 212
 213             char *guide_description = sp_guide_description(guide);
 214             desktop->guidesMessageContext()->setF(Inkscape::NORMAL_MESSAGE, "%s", guide_description);
 215             g_free(guide_description);
 216             break;
 217     }
 218     case GDK_LEAVE_NOTIFY:
 219             sp_guideline_set_color(SP_GUIDELINE(item), guide->color);
 220             desktop->guidesMessageContext()->clear();
 221             break;
 222     default:
 223             break;
 224     }
 225
 226     return ret;
 227 }
 228
 229
 230 /*
 231   Local Variables:
 232   mode:c++
 233   c-file-style:"stroustrup"
 234   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 235   indent-tabs-mode:nil
 236   fill-column:99
 237   End:
 238 */
 239 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :
 240