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     gint width, height;
  57     gdk_window_get_geometry(GTK_WIDGET(dtw->canvas)->window, NULL /*x*/, NULL /*y*/, &width, &height, NULL/*depth*/);
  58
  59     switch (event->type) {
  60     case GDK_BUTTON_PRESS:
  61             if (event->button.button == 1) {
  62                 dragging = true;
  63                 NR::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
  64                 NR::Point const event_dt(desktop->w2d(event_w));
  65
  66                 // explicitly show guidelines; if I draw a guide, I want them on
  67                 sp_repr_set_boolean(repr, "showguides", TRUE);
  68                 sp_repr_set_boolean(repr, "inkscape:guide-bbox", TRUE);
  69
  70                 if (horiz) {
  71                     if (wx < 50) {
  72                         normal = Geom::Point(-1.,1.);
  73                         normal.normalize();
  74                     } else if (wx > width - 50) {
  75                         normal = Geom::Point(1.,1.);
  76                         normal.normalize();
  77                     } else {
  78                         normal = Geom::Point(0.,1.);
  79                     }
  80                 } else {
  81                     if (wy < 50) {
  82                         normal = Geom::Point(-1.,1.);
  83                         normal.normalize();
  84                     } else if (wy > height - 50) {
  85                         normal = Geom::Point(1.,1.);
  86                         normal.normalize();
  87                     } else {
  88                         normal = Geom::Point(1.,0.);
  89                     }
  90                 }
  91
  92                 guide = sp_guideline_new(desktop->guides, event_dt.to_2geom(), normal);
  93                 sp_guideline_set_color(SP_GUIDELINE(guide), desktop->namedview->guidehicolor);
  94                 gdk_pointer_grab(widget->window, FALSE,
  95                                  (GdkEventMask)(GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK ),
  96                                  NULL, NULL,
  97                                  event->button.time);
  98             }
  99             break;
 100     case GDK_MOTION_NOTIFY:
 101             if (dragging) {
 102                 NR::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
 103                 NR::Point event_dt(desktop->w2d(event_w));
 104
 105                 SnapManager const &m = desktop->namedview->snap_manager;
 106                 event_dt = m.guideSnap(event_dt, normal).getPoint();
 107
 108                 sp_guideline_set_position(SP_GUIDELINE(guide), event_dt.to_2geom());
 109                 desktop->set_coordinate_status(event_dt);
 110                 desktop->setPosition (event_dt);
 111             }
 112             break;
 113     case GDK_BUTTON_RELEASE:
 114             if (dragging && event->button.button == 1) {
 115                 gdk_pointer_ungrab(event->button.time);
 116                 NR::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
 117                 NR::Point event_dt(desktop->w2d(event_w));
 118
 119                 SnapManager const &m = desktop->namedview->snap_manager;
 120                 event_dt = m.guideSnap(event_dt, normal).getPoint();
 121
 122                 dragging = false;
 123                 gtk_object_destroy(GTK_OBJECT(guide));
 124                 guide = NULL;
 125                 if ((horiz ? wy : wx) >= 0) {
 126                     Inkscape::XML::Document *xml_doc = sp_document_repr_doc(desktop->doc());
 127                     Inkscape::XML::Node *repr = xml_doc->createElement("sodipodi:guide");
 128                     sp_repr_set_point(repr, "orientation", normal);
 129                     sp_repr_set_point(repr, "position", event_dt.to_2geom());
 130                     SP_OBJECT_REPR(desktop->namedview)->appendChild(repr);
 131                     Inkscape::GC::release(repr);
 132                     sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 133                                      _("Create guide"));
 134                 }
 135                 desktop->set_coordinate_status(event_dt);
 136             }
 137         default:
 138             break;
 139     }
 140
 141     return FALSE;
 142 }
 143
 144 int sp_dt_hruler_event(GtkWidget *widget, GdkEvent *event, SPDesktopWidget *dtw)
 145 {
 146     return sp_dt_ruler_event(widget, event, dtw, true);
 147 }
 148
 149 int sp_dt_vruler_event(GtkWidget *widget, GdkEvent *event, SPDesktopWidget *dtw)
 150 {
 151     return sp_dt_ruler_event(widget, event, dtw, false);
 152 }
 153
 154 /* Guides */
 155
 156 gint sp_dt_guide_event(SPCanvasItem *item, GdkEvent *event, gpointer data)
 157 {
 158     static bool dragging = false;
 159     static bool moved = false;
 160     gint ret = FALSE;
 161
 162     SPGuide *guide = SP_GUIDE(data);
 163     SPDesktop *desktop = static_cast<SPDesktop*>(gtk_object_get_data(GTK_OBJECT(item->canvas), "SPDesktop"));
 164
 165         switch (event->type) {
 166         case GDK_2BUTTON_PRESS:
 167             if (event->button.button == 1) {
 168                 dragging = false;
 169                 sp_canvas_item_ungrab(item, event->button.time);
 170                 Inkscape::UI::Dialogs::GuidelinePropertiesDialog::showDialog(guide, desktop);
 171                 ret = TRUE;
 172             }
 173             break;
 174         case GDK_BUTTON_PRESS:
 175             if (event->button.button == 1) {
 176                 dragging = true;
 177                 sp_canvas_item_grab(item,
 178                                     ( GDK_BUTTON_RELEASE_MASK  |
 179                                       GDK_BUTTON_PRESS_MASK    |
 180                                       GDK_POINTER_MOTION_MASK ),
 181                                     NULL,
 182                                     event->button.time);
 183                 ret = TRUE;
 184             }
 185             break;
 186     case GDK_MOTION_NOTIFY:
 187             if (dragging) {
 188                 NR::Point const motion_w(event->motion.x,
 189                                          event->motion.y);
 190                 NR::Point motion_dt(desktop->w2d(motion_w));
 191
 192                 // This is for snapping while dragging existing guidelines. New guidelines,
 193                 // which are dragged off the ruler, are being snapped in sp_dt_ruler_event
 194                 SnapManager const &m = desktop->namedview->snap_manager;
 195                 motion_dt = m.guideSnap(motion_dt, guide->normal_to_line).getPoint();
 196
 197                 sp_guide_moveto(*guide, motion_dt.to_2geom(), false);
 198                 moved = true;
 199                 desktop->set_coordinate_status(motion_dt);
 200                 desktop->setPosition (motion_dt);
 201                 ret = TRUE;
 202             }
 203             break;
 204     case GDK_BUTTON_RELEASE:
 205             if (dragging && event->button.button == 1) {
 206                 if (moved) {
 207                     NR::Point const event_w(event->button.x,
 208                                             event->button.y);
 209                     NR::Point event_dt(desktop->w2d(event_w));
 210
 211                     SnapManager const &m = desktop->namedview->snap_manager;
 212                     event_dt = m.guideSnap(event_dt, guide->normal_to_line).getPoint();
 213
 214                     if (sp_canvas_world_pt_inside_window(item->canvas, event_w)) {
 215                         sp_guide_moveto(*guide, event_dt.to_2geom(), true);
 216                         sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 217                                      _("Move guide"));
 218                     } else {
 219                         /* Undo movement of any attached shapes. */
 220                         sp_guide_moveto(*guide, guide->point_on_line, false);
 221                         sp_guide_remove(guide);
 222                         sp_document_done(sp_desktop_document(desktop), SP_VERB_NONE,
 223                                      _("Delete guide"));
 224                     }
 225                     moved = false;
 226                     desktop->set_coordinate_status(event_dt);
 227                     desktop->setPosition (event_dt);
 228                 }
 229                 dragging = false;
 230                 sp_canvas_item_ungrab(item, event->button.time);
 231                 ret=TRUE;
 232             }
 233     case GDK_ENTER_NOTIFY:
 234     {
 235             sp_guideline_set_color(SP_GUIDELINE(item), guide->hicolor);
 236
 237             char *guide_description = sp_guide_description(guide);
 238             desktop->guidesMessageContext()->setF(Inkscape::NORMAL_MESSAGE, "%s", guide_description);
 239             g_free(guide_description);
 240             break;
 241     }
 242     case GDK_LEAVE_NOTIFY:
 243             sp_guideline_set_color(SP_GUIDELINE(item), guide->color);
 244             desktop->guidesMessageContext()->clear();
 245             break;
 246     default:
 247             break;
 248     }
 249
 250     return ret;
 251 }
 252
 253
 254 /*
 255   Local Variables:
 256   mode:c++
 257   c-file-style:"stroustrup"
 258   c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 259   indent-tabs-mode:nil
 260   fill-column:99
 261   End:
 262 */
 263 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :
 264