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