C++ (Cpp) SP_EVENT_CONTEXT_DOCUMENT Examples

Example #1

File: box3d-context.cpp Project: loveq369/DoonSketch

static void sp_box3d_drag(Box3DContext &bc, guint /*state*/)
{
    SPDesktop *desktop = SP_EVENT_CONTEXT(&bc)->desktop;

    if (!bc.item) {

        if (Inkscape::have_viable_layer(desktop, bc._message_context) == false) {
            return;
        }

        /* Create object */
        Inkscape::XML::Document *xml_doc = sp_document_repr_doc(SP_EVENT_CONTEXT_DOCUMENT(&bc));
        Inkscape::XML::Node *repr = xml_doc->createElement("svg:g");
        repr->setAttribute("sodipodi:type", "inkscape:box3d");

        /* Set style */
        sp_desktop_apply_style_tool (desktop, repr, "/tools/shapes/3dbox", false);

        bc.item = (SPItem *) desktop->currentLayer()->appendChildRepr(repr);
        Inkscape::GC::release(repr);
        Inkscape::XML::Node *repr_side;
        // TODO: Incorporate this in box3d-side.cpp!
        for (int i = 0; i < 6; ++i) {
            repr_side = xml_doc->createElement("svg:path");
            repr_side->setAttribute("sodipodi:type", "inkscape:box3dside");
            repr->addChild(repr_side, NULL);

            Box3DSide *side = SP_BOX3D_SIDE(inkscape_active_document()->getObjectByRepr (repr_side));

            guint desc = Box3D::int_to_face(i);

            Box3D::Axis plane = (Box3D::Axis) (desc & 0x7);
            plane = (Box3D::is_plane(plane) ? plane : Box3D::orth_plane_or_axis(plane));
            side->dir1 = Box3D::extract_first_axis_direction(plane);
            side->dir2 = Box3D::extract_second_axis_direction(plane);
            side->front_or_rear = (Box3D::FrontOrRear) (desc & 0x8);

            /* Set style */
            box3d_side_apply_style(side);

            SP_OBJECT(side)->updateRepr(); // calls box3d_side_write() and updates, e.g., the axes string description
        }

        box3d_set_z_orders(SP_BOX3D(bc.item));
        bc.item->updateRepr();

        // TODO: It would be nice to show the VPs during dragging, but since there is no selection
        //       at this point (only after finishing the box), we must do this "manually"
        /* bc._vpdrag->updateDraggers(); */

        desktop->canvas->force_full_redraw_after_interruptions(5);
    }

    g_assert(bc.item);

    SPBox3D *box = SP_BOX3D(bc.item);

    box->orig_corner0 = bc.drag_origin_proj;
    box->orig_corner7 = bc.drag_ptC_proj;

    box3d_check_for_swapped_coords(box);

    /* we need to call this from here (instead of from box3d_position_set(), for example)
       because z-order setting must not interfere with display updates during undo/redo */
    box3d_set_z_orders (box);

    box3d_position_set(box);

    // status text
    bc._message_context->setF(Inkscape::NORMAL_MESSAGE, "%s", _("<b>3D Box</b>; with <b>Shift</b> to extrude along the Z axis"));
}

Example #2

static void
sp_spiral_drag(SPSpiralContext *sc, Geom::Point p, guint state)
{
    SPDesktop *desktop = SP_EVENT_CONTEXT(sc)->desktop;

    Inkscape::Preferences *prefs = Inkscape::Preferences::get();
    int const snaps = prefs->getInt("/options/rotationsnapsperpi/value", 12);

    if (!sc->item) {

        if (Inkscape::have_viable_layer(desktop, sc->_message_context) == false) {
            return;
        }

        /* Create object */
        Inkscape::XML::Document *xml_doc = sp_document_repr_doc(SP_EVENT_CONTEXT_DOCUMENT(sc));
        Inkscape::XML::Node *repr = xml_doc->createElement("svg:path");
        repr->setAttribute("sodipodi:type", "spiral");

        /* Set style */
        sp_desktop_apply_style_tool(desktop, repr, "/tools/shapes/spiral", false);

        sc->item = (SPItem *) desktop->currentLayer()->appendChildRepr(repr);
        Inkscape::GC::release(repr);
        sc->item->transform = sp_item_i2doc_affine(SP_ITEM(desktop->currentLayer())).inverse();
        sc->item->updateRepr();

        sp_canvas_force_full_redraw_after_interruptions(desktop->canvas, 5);
    }

    SnapManager &m = desktop->namedview->snap_manager;
    m.setup(desktop, true, sc->item);
    Geom::Point pt2g = to_2geom(p);
    m.freeSnapReturnByRef(Inkscape::SnapPreferences::SNAPPOINT_NODE, pt2g);

    Geom::Point const p0 = to_2geom(sp_desktop_dt2doc_xy_point(desktop, sc->center));
    Geom::Point const p1 = to_2geom(sp_desktop_dt2doc_xy_point(desktop, from_2geom(pt2g)));        
    
    SPSpiral *spiral = SP_SPIRAL(sc->item);

    Geom::Point const delta = p1 - p0;
    gdouble const rad = Geom::L2(delta);

    gdouble arg = Geom::atan2(delta) - 2.0*M_PI*spiral->revo;

    if (state & GDK_CONTROL_MASK) {
        arg = sp_round(arg, M_PI/snaps);
    }

    /* Fixme: these parameters should be got from dialog box */
    sp_spiral_position_set(spiral, p0[Geom::X], p0[Geom::Y],
                           /*expansion*/ sc->exp,
                           /*revolution*/ sc->revo,
                           rad, arg,
                           /*t0*/ sc->t0);

    /* status text */
    GString *rads = SP_PX_TO_METRIC_STRING(rad, desktop->namedview->getDefaultMetric());
    sc->_message_context->setF(Inkscape::IMMEDIATE_MESSAGE,
                               _("<b>Spiral</b>: radius %s, angle %5g&#176;; with <b>Ctrl</b> to snap angle"),
                               rads->str, sp_round((arg + 2.0*M_PI*spiral->revo)*180/M_PI, 0.0001));
    g_string_free(rads, FALSE);
}