C++ SPDesktop::getDocument方法代码示例

static void
sp_arctb_startend_value_changed(GtkAdjustment *adj, GObject *tbl, gchar const *value_name, gchar const *other_name)
{
    SPDesktop *desktop = static_cast<SPDesktop *>(g_object_get_data( tbl, "desktop" ));

    if (DocumentUndo::getUndoSensitive(desktop->getDocument())) {
        Inkscape::Preferences *prefs = Inkscape::Preferences::get();
        prefs->setDouble(Glib::ustring("/tools/shapes/arc/") + value_name, gtk_adjustment_get_value(adj));
    }

    // quit if run by the attr_changed listener
    if (g_object_get_data( tbl, "freeze" )) {
        return;
    }

    // in turn, prevent listener from responding
    g_object_set_data( tbl, "freeze", GINT_TO_POINTER(TRUE) );

    gchar* namespaced_name = g_strconcat("sodipodi:", value_name, NULL);

    bool modmade = false;
    std::vector<SPItem*> itemlist=desktop->getSelection()->itemList();
    for(std::vector<SPItem*>::const_iterator i=itemlist.begin();i!=itemlist.end();i++){
        SPItem *item = *i;
        if (SP_IS_GENERICELLIPSE(item)) {

            SPGenericEllipse *ge = SP_GENERICELLIPSE(item);

            if (!strcmp(value_name, "start")) {
                ge->start = (gtk_adjustment_get_value(adj) * M_PI)/ 180;
            } else {
                ge->end = (gtk_adjustment_get_value(adj) * M_PI)/ 180;
            }

            ge->normalize();
            (SP_OBJECT(ge))->updateRepr();
            (SP_OBJECT(ge))->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);

            modmade = true;
        }
    }

    g_free(namespaced_name);

    GtkAdjustment *other = GTK_ADJUSTMENT( g_object_get_data( tbl, other_name ) );

    sp_arctb_sensitivize( tbl, gtk_adjustment_get_value(adj), gtk_adjustment_get_value(other) );

    if (modmade) {
        DocumentUndo::maybeDone(desktop->getDocument(), value_name, SP_VERB_CONTEXT_ARC,
                                _("Arc: Change start/end"));
    }

    g_object_set_data( tbl, "freeze", GINT_TO_POINTER(FALSE) );
}

static void sp_arctb_open_state_changed( EgeSelectOneAction *act, GObject *tbl )
{
    SPDesktop *desktop = static_cast<SPDesktop *>(g_object_get_data( tbl, "desktop" ));
    if (DocumentUndo::getUndoSensitive(desktop->getDocument())) {
        Inkscape::Preferences *prefs = Inkscape::Preferences::get();
        prefs->setBool("/tools/shapes/arc/open", ege_select_one_action_get_active(act) != 0);
    }

    // quit if run by the attr_changed listener
    if (g_object_get_data( tbl, "freeze" )) {
        return;
    }

    // in turn, prevent listener from responding
    g_object_set_data( tbl, "freeze", GINT_TO_POINTER(TRUE) );

    bool modmade = false;

    if ( ege_select_one_action_get_active(act) != 0 ) {
    	std::vector<SPItem*> itemlist=desktop->getSelection()->itemList();
        for(std::vector<SPItem*>::const_iterator i=itemlist.begin();i!=itemlist.end();i++){
            SPItem *item = *i;
            if (SP_IS_GENERICELLIPSE(item)) {
                Inkscape::XML::Node *repr = item->getRepr();
                repr->setAttribute("sodipodi:open", "true");
                item->updateRepr();
                modmade = true;
            }
        }
    } else {
    	std::vector<SPItem*> itemlist=desktop->getSelection()->itemList();
        for(std::vector<SPItem*>::const_iterator i=itemlist.begin();i!=itemlist.end();i++){
            SPItem *item = *i;
            if (SP_IS_GENERICELLIPSE(item)) {
                Inkscape::XML::Node *repr = item->getRepr();
                repr->setAttribute("sodipodi:open", NULL);
                item->updateRepr();
                modmade = true;
            }
        }
    }

    if (modmade) {
        DocumentUndo::done(desktop->getDocument(), SP_VERB_CONTEXT_ARC,
                           _("Arc: Change open/closed"));
    }

    g_object_set_data( tbl, "freeze", GINT_TO_POINTER(FALSE) );
}

static void box3d_angle_value_changed(GtkAdjustment *adj, GObject *dataKludge, Proj::Axis axis)
{
    SPDesktop *desktop = static_cast<SPDesktop *>(g_object_get_data( dataKludge, "desktop" ));
    SPDocument *document = desktop->getDocument();

    // quit if run by the attr_changed or selection changed listener
    if (g_object_get_data( dataKludge, "freeze" )) {
        return;
    }

    // in turn, prevent listener from responding
    g_object_set_data(dataKludge, "freeze", GINT_TO_POINTER(TRUE));

    std::list<Persp3D *> sel_persps = desktop->getSelection()->perspList();
    if (sel_persps.empty()) {
        // this can happen when the document is created; we silently ignore it
        return;
    }
    Persp3D *persp = sel_persps.front();

    persp->perspective_impl->tmat.set_infinite_direction (axis,
            gtk_adjustment_get_value(adj));
    persp->updateRepr();

    // TODO: use the correct axis here, too
    DocumentUndo::maybeDone(document, "perspangle", SP_VERB_CONTEXT_3DBOX, _("3D Box: Change perspective (angle of infinite axis)"));

    g_object_set_data( dataKludge, "freeze", GINT_TO_POINTER(FALSE) );
}

void spdc_create_single_dot(ToolBase *ec, Geom::Point const &pt, char const *tool, guint event_state) {
    g_return_if_fail(!strcmp(tool, "/tools/freehand/pen") || !strcmp(tool, "/tools/freehand/pencil"));
    Glib::ustring tool_path = tool;

    SPDesktop *desktop = ec->desktop;
    Inkscape::XML::Document *xml_doc = desktop->doc()->getReprDoc();
    Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
    repr->setAttribute("sodipodi:type", "arc");
    SPItem *item = SP_ITEM(desktop->currentLayer()->appendChildRepr(repr));
    Inkscape::GC::release(repr);

    // apply the tool's current style
    sp_desktop_apply_style_tool(desktop, repr, tool, false);

    // find out stroke width (TODO: is there an easier way??)
    double stroke_width = 3.0;
    gchar const *style_str = repr->attribute("style");
    if (style_str) {
        SPStyle style(SP_ACTIVE_DOCUMENT);
        style.mergeString(style_str);
        stroke_width = style.stroke_width.computed;
    }

    // unset stroke and set fill color to former stroke color
    gchar * str;
    str = g_strdup_printf("fill:#%06x;stroke:none;", sp_desktop_get_color_tool(desktop, tool, false) >> 8);
    repr->setAttribute("style", str);
    g_free(str);

    // put the circle where the mouse click occurred and set the diameter to the
    // current stroke width, multiplied by the amount specified in the preferences
    Inkscape::Preferences *prefs = Inkscape::Preferences::get();

    Geom::Affine const i2d (item->i2dt_affine ());
    Geom::Point pp = pt * i2d.inverse();
    double rad = 0.5 * prefs->getDouble(tool_path + "/dot-size", 3.0);
    if (event_state & GDK_MOD1_MASK) {
        // TODO: We vary the dot size between 0.5*rad and 1.5*rad, where rad is the dot size
        // as specified in prefs. Very simple, but it might be sufficient in practice. If not,
        // we need to devise something more sophisticated.
        double s = g_random_double_range(-0.5, 0.5);
        rad *= (1 + s);
    }
    if (event_state & GDK_SHIFT_MASK) {
        // double the point size
        rad *= 2;
    }

    sp_repr_set_svg_double (repr, "sodipodi:cx", pp[Geom::X]);
    sp_repr_set_svg_double (repr, "sodipodi:cy", pp[Geom::Y]);
    sp_repr_set_svg_double (repr, "sodipodi:rx", rad * stroke_width);
    sp_repr_set_svg_double (repr, "sodipodi:ry", rad * stroke_width);
    item->updateRepr();

    desktop->getSelection()->set(item);

    desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Creating single dot"));
    DocumentUndo::done(desktop->getDocument(), SP_VERB_NONE, _("Create single dot"));
}

static void sp_rtb_value_changed(GtkAdjustment *adj, GObject *tbl, gchar const *value_name,
                                 void (SPRect::*setter)(gdouble))
{
    SPDesktop *desktop = static_cast<SPDesktop *>(g_object_get_data( tbl, "desktop" ));

    UnitTracker* tracker = reinterpret_cast<UnitTracker*>(g_object_get_data( tbl, "tracker" ));
    Unit const *unit = tracker->getActiveUnit();
    g_return_if_fail(unit != NULL);

    if (DocumentUndo::getUndoSensitive(desktop->getDocument())) {
        Inkscape::Preferences *prefs = Inkscape::Preferences::get();
        prefs->setDouble(Glib::ustring("/tools/shapes/rect/") + value_name,
            Quantity::convert(gtk_adjustment_get_value(adj), unit, "px"));
    }

    // quit if run by the attr_changed listener
    if (g_object_get_data( tbl, "freeze" ) || tracker->isUpdating()) {
        return;
    }

    // in turn, prevent listener from responding
    g_object_set_data( tbl, "freeze", GINT_TO_POINTER(TRUE));

    bool modmade = false;
    Inkscape::Selection *selection = desktop->getSelection();
    std::vector<SPItem*> itemlist=selection->itemList();
    for(std::vector<SPItem*>::const_iterator i=itemlist.begin();i!=itemlist.end();++i){
        if (SP_IS_RECT(*i)) {
            if (gtk_adjustment_get_value(adj) != 0) {
                (SP_RECT(*i)->*setter)(Quantity::convert(gtk_adjustment_get_value(adj), unit, "px"));
            } else {
                (*i)->getRepr()->setAttribute(value_name, NULL);
            }
            modmade = true;
        }
    }

    sp_rtb_sensitivize( tbl );

    if (modmade) {
        DocumentUndo::done(desktop->getDocument(), SP_VERB_CONTEXT_RECT,
                           _("Change rectangle"));
    }

    g_object_set_data( tbl, "freeze", GINT_TO_POINTER(FALSE) );
}

static void sp_spl_tb_value_changed(GtkAdjustment *adj, GObject *tbl, Glib::ustring const &value_name)
{
    SPDesktop *desktop = static_cast<SPDesktop *>(g_object_get_data( tbl, "desktop" ));

    if (DocumentUndo::getUndoSensitive(desktop->getDocument())) {
        Inkscape::Preferences *prefs = Inkscape::Preferences::get();
        prefs->setDouble("/tools/shapes/spiral/" + value_name,
            gtk_adjustment_get_value(adj));
    }

    // quit if run by the attr_changed listener
    if (g_object_get_data( tbl, "freeze" )) {
        return;
    }

    // in turn, prevent listener from responding
    g_object_set_data( tbl, "freeze", GINT_TO_POINTER(TRUE) );

    gchar* namespaced_name = g_strconcat("sodipodi:", value_name.data(), NULL);

    bool modmade = false;
    std::vector<SPItem*> itemlist=desktop->getSelection()->itemList();
    for(std::vector<SPItem*>::const_iterator i=itemlist.begin();i!=itemlist.end(); ++i){
        SPItem *item = *i;
        if (SP_IS_SPIRAL(item)) {
            Inkscape::XML::Node *repr = item->getRepr();
            sp_repr_set_svg_double( repr, namespaced_name,
                gtk_adjustment_get_value(adj) );
            item->updateRepr();
            modmade = true;
        }
    }

    g_free(namespaced_name);

    if (modmade) {
        DocumentUndo::done(desktop->getDocument(), SP_VERB_CONTEXT_SPIRAL,
                           _("Change spiral"));
    }

    g_object_set_data( tbl, "freeze", GINT_TO_POINTER(FALSE) );
}

void
ObjectCompositeSettings::_opacityValueChanged()
{
    if (!_subject) {
        return;
    }

    SPDesktop *desktop = _subject->getDesktop();
    if (!desktop) {
        return;
    }

    if (_blocked)
        return;
    _blocked = true;

    // FIXME: fix for GTK breakage, see comment in SelectedStyle::on_opacity_changed; here it results in crash 1580903
    // UPDATE: crash fixed in GTK+ 2.10.7 (bug 374378), remove this as soon as it's reasonably common
    // (though this only fixes the crash, not the multiple change events)
    //sp_canvas_force_full_redraw_after_interruptions(desktop->getCanvas(), 0);

    SPCSSAttr *css = sp_repr_css_attr_new ();

    Inkscape::CSSOStringStream os;
    os << CLAMP (_opacity_scale.get_adjustment()->get_value() / 100, 0.0, 1.0);
    sp_repr_css_set_property (css, "opacity", os.str().c_str());

    _subject->setCSS(css);

    sp_repr_css_attr_unref (css);

    DocumentUndo::maybeDone(desktop->getDocument(), _opacity_tag.c_str(), _verb_code,
                            _("Change opacity"));

    // resume interruptibility
    //sp_canvas_end_forced_full_redraws(desktop->getCanvas());

    _blocked = false;
}

/**
 * Sets mesh type: Coons, Bicubic
 */
static void ms_type_changed(EgeSelectOneAction *act, GtkWidget *widget)
{
    // std::cout << "ms_type_changed" << std::endl;
    if (blocked) {
        return;
    }

    SPDesktop *desktop = static_cast<SPDesktop *>(g_object_get_data(G_OBJECT(widget), "desktop"));
    Inkscape::Selection *selection = desktop->getSelection();
    SPMesh *gradient = 0;
    ms_get_dt_selected_gradient(selection, gradient);

    if (gradient) {
        SPMeshType type = (SPMeshType) ege_select_one_action_get_active(act);
        // std::cout << "   type: " << type << std::endl;
        gradient->type = type;
        gradient->type_set = true;
        gradient->updateRepr();

        DocumentUndo::done(desktop->getDocument(), SP_VERB_CONTEXT_MESH,
                   _("Set mesh type"));
    }
}

static void sp_erasertb_mode_changed( EgeSelectOneAction *act, GObject *tbl )
{
    SPDesktop *desktop = static_cast<SPDesktop *>(g_object_get_data( tbl, "desktop" ));
    bool eraserMode = ege_select_one_action_get_active( act ) != 0;
    if (DocumentUndo::getUndoSensitive(desktop->getDocument())) {
        Inkscape::Preferences *prefs = Inkscape::Preferences::get();
        prefs->setBool( "/tools/eraser/mode", eraserMode );
    }

    // only take action if run by the attr_changed listener
    if (!g_object_get_data( tbl, "freeze" )) {
        // in turn, prevent listener from responding
        g_object_set_data( tbl, "freeze", GINT_TO_POINTER(TRUE) );

        /*
        if ( eraserMode != 0 ) {
        } else {
        }
        */
        // TODO finish implementation

        g_object_set_data( tbl, "freeze", GINT_TO_POINTER(FALSE) );
    }
}

//.........这里部分代码省略.........
                gdk_device_grab(device,
                                gtk_widget_get_window(widget), 
                                GDK_OWNERSHIP_NONE,
                                FALSE,
                                (GdkEventMask)(GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK ),
                                NULL,
                                event->button.time);
#else
                gdk_pointer_grab(gtk_widget_get_window (widget), FALSE,
                                 (GdkEventMask)(GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK ),
                                 NULL, NULL,
                                 event->button.time);
#endif
            }
            break;
    case GDK_MOTION_NOTIFY:
            if (clicked) {
                Geom::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
                Geom::Point event_dt(desktop->w2d(event_w));

                Inkscape::Preferences *prefs = Inkscape::Preferences::get();
                gint tolerance = prefs->getIntLimited("/options/dragtolerance/value", 0, 0, 100);
                if ( ( abs( (gint) event->motion.x - xp ) < tolerance )
                        && ( abs( (gint) event->motion.y - yp ) < tolerance ) ) {
                    break;
                }

                dragged = true;

                // explicitly show guidelines; if I draw a guide, I want them on
                if ((horiz ? wy : wx) >= 0) {
                    desktop->namedview->setGuides(true);
                }

                if (!(event->motion.state & GDK_SHIFT_MASK)) {
                    sp_dt_ruler_snap_new_guide(desktop, guide, event_dt, normal);
                }
                sp_guideline_set_normal(SP_GUIDELINE(guide), normal);
                sp_guideline_set_position(SP_GUIDELINE(guide), event_dt);

                desktop->set_coordinate_status(event_dt);
            }
            break;
    case GDK_BUTTON_RELEASE:
            if (clicked && event->button.button == 1) {
                sp_event_context_discard_delayed_snap_event(desktop->event_context);

#if GTK_CHECK_VERSION(3,0,0)
                gdk_device_ungrab(device, event->button.time);
#else
                gdk_pointer_ungrab(event->button.time);
#endif

                Geom::Point const event_w(sp_canvas_window_to_world(dtw->canvas, event_win));
                Geom::Point event_dt(desktop->w2d(event_w));

                if (!(event->button.state & GDK_SHIFT_MASK)) {
                    sp_dt_ruler_snap_new_guide(desktop, guide, event_dt, normal);
                }

                sp_canvas_item_destroy(guide);
                guide = NULL;
                if ((horiz ? wy : wx) >= 0) {
                    Inkscape::XML::Document *xml_doc = desktop->doc()->getReprDoc();
                    Inkscape::XML::Node *repr = xml_doc->createElement("sodipodi:guide");

                    // If root viewBox set, interpret guides in terms of viewBox (90/96)
                    double newx = event_dt.x();
                    double newy = event_dt.y();

                    SPRoot *root = desktop->doc()->getRoot();
                    if( root->viewBox_set ) {
                        newx = newx * root->viewBox.width()  / root->width.computed;
                        newy = newy * root->viewBox.height() / root->height.computed;
                    }
                    sp_repr_set_point(repr, "position", Geom::Point( newx, newy ));
                    sp_repr_set_point(repr, "orientation", normal);
                    desktop->namedview->appendChild(repr);
                    Inkscape::GC::release(repr);
                    DocumentUndo::done(desktop->getDocument(), SP_VERB_NONE,
                                     _("Create guide"));
                }
                desktop->set_coordinate_status(event_dt);

                if (!dragged) {
                    // Ruler click (without drag) toggle the guide visibility on and off
                    Inkscape::XML::Node *repr = desktop->namedview->getRepr();
                    sp_namedview_toggle_guides(desktop->getDocument(), repr);
                    
                }

                clicked = false;
                dragged = false;
            }
    default:
            break;
    }

    return FALSE;
}

//.........这里部分代码省略.........
                            }
                            case SP_DRAG_ROTATE:
                            {
                                Geom::Point pt = event_dt - guide->getPoint();
                                Geom::Angle angle(pt);
                                if (event->motion.state & GDK_CONTROL_MASK) {
                                    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
                                    unsigned const snaps = abs(prefs->getInt("/options/rotationsnapsperpi/value", 12));
                                    bool const relative_snaps = prefs->getBool("/options/relativeguiderotationsnap/value", false);
                                    if (snaps) {
                                        if (relative_snaps) {
                                            Geom::Angle orig_angle(guide->getNormal());
                                            Geom::Angle snap_angle = angle - orig_angle;
                                            double sections = floor(snap_angle.radians0() * snaps / M_PI + .5);
                                            angle = (M_PI / snaps) * sections + orig_angle.radians0();
                                        } else {
                                            double sections = floor(angle.radians0() * snaps / M_PI + .5);
                                            angle = (M_PI / snaps) * sections;
                                        }
                                    }
                                }
                                guide->set_normal(Geom::Point::polar(angle).cw(), true);
                                break;
                            }
                            case SP_DRAG_MOVE_ORIGIN:
                            {
                                guide->moveto(event_dt, true);
                                break;
                            }
                            case SP_DRAG_NONE:
                                assert(false);
                                break;
                        }
                        DocumentUndo::done(desktop->getDocument(), SP_VERB_NONE,
                                         _("Move guide"));
                    } else {
                        /* Undo movement of any attached shapes. */
                        guide->moveto(guide->getPoint(), false);
                        guide->set_normal(guide->getNormal(), false);
                        sp_guide_remove(guide);
                        DocumentUndo::done(desktop->getDocument(), SP_VERB_NONE,
                                     _("Delete guide"));
                    }
                    moved = false;
                    desktop->set_coordinate_status(event_dt);
                }
                drag_type = SP_DRAG_NONE;
                sp_canvas_item_ungrab(item, event->button.time);
                ret=TRUE;
            }
            break;
    case GDK_ENTER_NOTIFY:
    {
            sp_guideline_set_color(SP_GUIDELINE(item), guide->getHiColor());

            // set move or rotate cursor
            Geom::Point const event_w(event->crossing.x, event->crossing.y);

            if ((event->crossing.state & GDK_SHIFT_MASK) && (drag_type != SP_DRAG_MOVE_ORIGIN)) {
                GdkCursor *guide_cursor;
                guide_cursor = gdk_cursor_new (GDK_EXCHANGE);
                gdk_window_set_cursor(gtk_widget_get_window (GTK_WIDGET(desktop->getCanvas())), guide_cursor);
#if GTK_CHECK_VERSION(3,0,0)
                g_object_unref(guide_cursor);
#else
                gdk_cursor_unref(guide_cursor);

SPObject *get_stock_item(gchar const *urn, gboolean stock)
{
    g_assert(urn != NULL);
    
    /* check its an inkscape URN */
    if (!strncmp (urn, "urn:inkscape:", 13)) {

        gchar const *e = urn + 13;
        int a = 0;
        gchar * name = g_strdup(e);
        gchar *name_p = name;
        while (*name_p != ':' && *name_p != '\0'){
            name_p++;
            a++;
        }
        
        if (*name_p ==':') {
            name_p++;
        }
        
        gchar * base = g_strndup(e, a);

        SPDesktop *desktop = SP_ACTIVE_DESKTOP;
        SPDocument *doc = desktop->getDocument();
        SPDefs *defs = doc->getDefs();
        if (!defs) {
            g_free(base);
            return NULL;
        }
        SPObject *object = NULL;
        if (!strcmp(base, "marker") && !stock) {
            for ( SPObject *child = defs->firstChild(); child; child = child->getNext() )
            {
                if (child->getRepr()->attribute("inkscape:stockid") &&
                    !strcmp(name_p, child->getRepr()->attribute("inkscape:stockid")) &&
                    SP_IS_MARKER(child))
                {
                    object = child;
                }
            }
            
        }
        else if (!strcmp(base,"pattern") && !stock)  {
            for ( SPObject *child = defs->firstChild() ; child; child = child->getNext() )
            {
                if (child->getRepr()->attribute("inkscape:stockid") &&
                    !strcmp(name_p, child->getRepr()->attribute("inkscape:stockid")) &&
                    SP_IS_PATTERN(child))
                {
                    object = child;
                }
            }
            
        }
        else if (!strcmp(base,"gradient") && !stock)  {
            for ( SPObject *child = defs->firstChild(); child; child = child->getNext() )
            {
                if (child->getRepr()->attribute("inkscape:stockid") &&
                    !strcmp(name_p, child->getRepr()->attribute("inkscape:stockid")) &&
                    SP_IS_GRADIENT(child))
                {
                    object = child;
                }
            }
            
        }
        
        if (object == NULL) {
            
            if (!strcmp(base, "marker"))  {
                object = sp_marker_load_from_svg(name_p, doc);
            }
            else if (!strcmp(base, "pattern"))  {
                object = sp_pattern_load_from_svg(name_p, doc);
            }
            else if (!strcmp(base, "gradient"))  {
                object = sp_gradient_load_from_svg(name_p, doc);
            }
        }
        
        g_free(base);
        g_free(name);
        
        if (object) {
            object->getRepr()->setAttribute("inkscape:isstock", "true");
        }

        return object;
    }
    
    else {
        
        SPDesktop *desktop = SP_ACTIVE_DESKTOP;
        SPDocument *doc = desktop->getDocument();
        SPObject *object = doc->getObjectById(urn);

        return object;
    }
}

static void spdc_flush_white(FreehandBase *dc, SPCurve *gc)
{
    SPCurve *c;
    if (dc->white_curves) {
        g_assert(dc->white_item);
        c = SPCurve::concat(dc->white_curves);
        g_slist_free(dc->white_curves);
        dc->white_curves = NULL;
        if (gc) {
            c->append(gc, FALSE);
        }
    } else if (gc) {
        c = gc;
        c->ref();
    } else {
        return;
    }

    // Now we have to go back to item coordinates at last
    c->transform( dc->white_item
                            ? (dc->white_item)->dt2i_affine()
                            : dc->desktop->dt2doc() );

    SPDesktop *desktop = dc->desktop;
    SPDocument *doc = desktop->getDocument();
    Inkscape::XML::Document *xml_doc = doc->getReprDoc();

    if ( c && !c->is_empty() ) {
        // We actually have something to write

        bool has_lpe = false;
        Inkscape::XML::Node *repr;

        if (dc->white_item) {
            repr = dc->white_item->getRepr();
            has_lpe = SP_LPE_ITEM(dc->white_item)->hasPathEffectRecursive();
        } else {
            repr = xml_doc->createElement("svg:path");
            // Set style
            sp_desktop_apply_style_tool(desktop, repr, tool_name(dc).data(), false);
        }

        gchar *str = sp_svg_write_path( c->get_pathvector() );
        g_assert( str != NULL );
        if (has_lpe)
            repr->setAttribute("inkscape:original-d", str);
        else
            repr->setAttribute("d", str);
        g_free(str);

        if (!dc->white_item) {
            // Attach repr
            SPItem *item = SP_ITEM(desktop->currentLayer()->appendChildRepr(repr));

            spdc_check_for_and_apply_waiting_LPE(dc, item, c);
            if(previous_shape_type != BEND_CLIPBOARD){
                dc->selection->set(repr);
            }
            Inkscape::GC::release(repr);
            item->transform = SP_ITEM(desktop->currentLayer())->i2doc_affine().inverse();
            item->updateRepr();
            item->doWriteTransform(item->getRepr(), item->transform, NULL, true);
            if(previous_shape_type == BEND_CLIPBOARD){
                repr->parent()->removeChild(repr);
            }
        }

        DocumentUndo::done(doc, SP_IS_PEN_CONTEXT(dc)? SP_VERB_CONTEXT_PEN : SP_VERB_CONTEXT_PENCIL,
                         _("Draw path"));

        // When quickly drawing several subpaths with Shift, the next subpath may be finished and
        // flushed before the selection_modified signal is fired by the previous change, which
        // results in the tool losing all of the selected path's curve except that last subpath. To
        // fix this, we force the selection_modified callback now, to make sure the tool's curve is
        // in sync immediately.
        spdc_selection_modified(desktop->getSelection(), 0, dc);
    }

    c->unref();

    // Flush pending updates
    doc->ensureUpToDate();
}

void
ObjectCompositeSettings::_blendBlurValueChanged()
{
    if (!_subject) {
        return;
    }

    SPDesktop *desktop = _subject->getDesktop();
    if (!desktop) {
        return;
    }
    SPDocument *document = desktop->getDocument();

    if (_blocked)
        return;
    _blocked = true;

    // FIXME: fix for GTK breakage, see comment in SelectedStyle::on_opacity_changed; here it results in crash 1580903
    //sp_canvas_force_full_redraw_after_interruptions(desktop->getCanvas(), 0);

    Geom::OptRect bbox = _subject->getBounds(SPItem::GEOMETRIC_BBOX);
    double radius;
    if (bbox) {
        double perimeter = bbox->dimensions()[Geom::X] + bbox->dimensions()[Geom::Y];   // fixme: this is only half the perimeter, is that correct?
        radius = _fe_cb.get_blur_value() * perimeter / 400;
    } else {
        radius = 0;
    }

    const Glib::ustring blendmode = _fe_cb.get_blend_mode();

    //apply created filter to every selected item
    std::vector<SPObject*> sel=_subject->list();
    for (std::vector<SPObject*>::const_iterator i = sel.begin() ; i != sel.end() ; ++i ) {
        if (!SP_IS_ITEM(*i)) {
            continue;
        }

        SPItem * item = SP_ITEM(*i);
        SPStyle *style = item->style;
        g_assert(style != NULL);

        if (blendmode != "normal") {
            SPFilter *filter = new_filter_simple_from_item(document, item, blendmode.c_str(), radius);
            sp_style_set_property_url(item, "filter", filter, false);
        } else {
            sp_style_set_property_url(item, "filter", NULL, false);
        }

        if (radius == 0 && item->style->filter.set
            && filter_is_single_gaussian_blur(SP_FILTER(item->style->getFilter()))) {
            remove_filter(item, false);
        }
        else if (radius != 0) {
            SPFilter *filter = modify_filter_gaussian_blur_from_item(document, item, radius);
            sp_style_set_property_url(item, "filter", filter, false);
        }

        //request update
        item->requestDisplayUpdate(( SP_OBJECT_MODIFIED_FLAG |
                                     SP_OBJECT_STYLE_MODIFIED_FLAG ));
    }

    DocumentUndo::maybeDone(document, _blur_tag.c_str(), _verb_code,
                            _("Change blur"));

    // resume interruptibility
    //sp_canvas_end_forced_full_redraws(desktop->getCanvas());

    _blocked = false;
}

void
ObjectCompositeSettings::_subjectChanged() {
    if (!_subject) {
        return;
    }

    SPDesktop *desktop = _subject->getDesktop();
    if (!desktop) {
        return;
    }

    if (_blocked)
        return;
    _blocked = true;

    SPStyle query(desktop->getDocument());
    int result = _subject->queryStyle(&query, QUERY_STYLE_PROPERTY_MASTEROPACITY);

    switch (result) {
        case QUERY_STYLE_NOTHING:
            _opacity_vbox.set_sensitive(false);
            // gtk_widget_set_sensitive (opa, FALSE);
            break;
        case QUERY_STYLE_SINGLE:
        case QUERY_STYLE_MULTIPLE_AVERAGED: // TODO: treat this slightly differently
        case QUERY_STYLE_MULTIPLE_SAME:
            _opacity_vbox.set_sensitive(true);
            _opacity_scale.get_adjustment()->set_value(100 * SP_SCALE24_TO_FLOAT(query.opacity.value));
            break;
    }

    //query now for current filter mode and average blurring of selection
    const int blend_result = _subject->queryStyle(&query, QUERY_STYLE_PROPERTY_BLEND);
    switch(blend_result) {
        case QUERY_STYLE_NOTHING:
            _fe_cb.set_sensitive(false);
            break;
        case QUERY_STYLE_SINGLE:
        case QUERY_STYLE_MULTIPLE_SAME:
            _fe_cb.set_blend_mode(query.filter_blend_mode.value);
            _fe_cb.set_sensitive(true);
            break;
        case QUERY_STYLE_MULTIPLE_DIFFERENT:
            // TODO: set text
            _fe_cb.set_sensitive(false);
            break;
    }

    if(blend_result == QUERY_STYLE_SINGLE || blend_result == QUERY_STYLE_MULTIPLE_SAME) {
        int blur_result = _subject->queryStyle(&query, QUERY_STYLE_PROPERTY_BLUR);
        switch (blur_result) {
            case QUERY_STYLE_NOTHING: //no blurring
                _fe_cb.set_blur_sensitive(false);
                break;
            case QUERY_STYLE_SINGLE:
            case QUERY_STYLE_MULTIPLE_AVERAGED:
            case QUERY_STYLE_MULTIPLE_SAME:
                Geom::OptRect bbox = _subject->getBounds(SPItem::GEOMETRIC_BBOX);
                if (bbox) {
                    double perimeter = bbox->dimensions()[Geom::X] + bbox->dimensions()[Geom::Y];   // fixme: this is only half the perimeter, is that correct?
                    _fe_cb.set_blur_sensitive(true);
                    //update blur widget value
                    float radius = query.filter_gaussianBlur_deviation.value;
                    float percent = radius * 400 / perimeter; // so that for a square, 100% == half side
                    _fe_cb.set_blur_value(percent);
                }
                break;
        }
    }

    _blocked = false;
}