static void sp_dropper_context_setup(SPEventContext *ec)
{
SPDropperContext *dc = SP_DROPPER_CONTEXT(ec);
if (((SPEventContextClass *) parent_class)->setup) {
((SPEventContextClass *) parent_class)->setup(ec);
}
/* TODO: have a look at sp_dyna_draw_context_setup where the same is done.. generalize? at least make it an arcto! */
SPCurve *c = new SPCurve();
const double C1 = 0.552;
c->moveto(-1,0);
c->curveto(-1, C1, -C1, 1, 0, 1 );
c->curveto(C1, 1, 1, C1, 1, 0 );
c->curveto(1, -C1, C1, -1, 0, -1 );
c->curveto(-C1, -1, -1, -C1, -1, 0 );
c->closepath();
dc->area = sp_canvas_bpath_new(sp_desktop_controls(ec->desktop), c);
c->unref();
sp_canvas_bpath_set_fill(SP_CANVAS_BPATH(dc->area), 0x00000000,(SPWindRule)0);
sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(dc->area), 0x0000007f, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
sp_canvas_item_hide(dc->area);
Inkscape::Preferences *prefs = Inkscape::Preferences::get();
if (prefs->getBool("/tools/dropper/selcue")) {
ec->enableSelectionCue();
}
if (prefs->getBool("/tools/dropper/gradientdrag")) {
ec->enableGrDrag();
}
}
static void
spdc_pen_finish_segment (SPPenContext *pc, NRPointF *p, guint state)
{
SPDrawContext *dc;
dc = SP_DRAW_CONTEXT (pc);
if (!sp_curve_empty (dc->red_curve)) {
SPCurve *curve;
SPCanvasItem *cshape;
sp_curve_append_continuous (dc->green_curve, dc->red_curve, 0.0625);
curve = sp_curve_copy (dc->red_curve);
/* fixme: */
cshape = sp_canvas_bpath_new (SP_DT_SKETCH (SP_EVENT_CONTEXT (dc)->desktop), curve);
sp_curve_unref (curve);
sp_canvas_bpath_set_stroke (SP_CANVAS_BPATH (cshape), dc->green_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
dc->green_bpaths = g_slist_prepend (dc->green_bpaths, cshape);
dc->p[0] = dc->p[3];
dc->p[1] = dc->p[4];
dc->npoints = 2;
sp_curve_reset (dc->red_curve);
}
}
static void
fit_and_split(SPPencilContext *pc)
{
g_assert( pc->npoints > 1 );
double const tolerance_sq = 0;
Geom::Point b[4];
g_assert(is_zero(pc->req_tangent)
|| is_unit_vector(pc->req_tangent));
Geom::Point const tHatEnd(0, 0);
int const n_segs = Geom::bezier_fit_cubic_full(b, NULL, pc->p, pc->npoints,
pc->req_tangent, tHatEnd,
tolerance_sq, 1);
if ( n_segs > 0
&& unsigned(pc->npoints) < G_N_ELEMENTS(pc->p) )
{
/* Fit and draw and reset state */
pc->red_curve->reset();
pc->red_curve->moveto(b[0]);
pc->red_curve->curveto(b[1], b[2], b[3]);
sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), pc->red_curve);
pc->red_curve_is_valid = true;
} else {
/* Fit and draw and copy last point */
g_assert(!pc->red_curve->is_empty());
/* Set up direction of next curve. */
{
Geom::CubicBezier const * last_seg = dynamic_cast<Geom::CubicBezier const *>(pc->red_curve->last_segment());
g_assert( last_seg ); // Relevance: validity of (*last_seg)[2]
pc->p[0] = last_seg->finalPoint();
pc->npoints = 1;
Geom::Point const req_vec( pc->p[0] - (*last_seg)[2] );
pc->req_tangent = ( ( Geom::is_zero(req_vec) || !in_svg_plane(req_vec) )
? Geom::Point(0, 0)
: Geom::unit_vector(req_vec) );
}
pc->green_curve->append_continuous(pc->red_curve, 0.0625);
SPCurve *curve = pc->red_curve->copy();
/// \todo fixme:
SPCanvasItem *cshape = sp_canvas_bpath_new(sp_desktop_sketch(pc->desktop), curve);
curve->unref();
sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(cshape), pc->green_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
pc->green_bpaths = g_slist_prepend(pc->green_bpaths, cshape);
pc->red_curve_is_valid = false;
}
}
static void
sp_draw_context_setup (SPEventContext *ec)
{
SPDrawContext *dc;
SPDesktop *dt;
dc = SP_DRAW_CONTEXT (ec);
dt = ec->desktop;
if (((SPEventContextClass *) draw_parent_class)->setup)
((SPEventContextClass *) draw_parent_class)->setup (ec);
dc->selection = SP_DT_SELECTION (dt);
/* Connect signals to track selection changes */
g_signal_connect (G_OBJECT (dc->selection), "changed", G_CALLBACK (spdc_selection_changed), dc);
g_signal_connect (G_OBJECT (dc->selection), "modified", G_CALLBACK (spdc_selection_modified), dc);
/* Create red bpath */
dc->red_bpath = sp_canvas_bpath_new (SP_DT_SKETCH (ec->desktop), NULL);
sp_canvas_bpath_set_stroke (SP_CANVAS_BPATH (dc->red_bpath), dc->red_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
/* Create red curve */
dc->red_curve = sp_curve_new_sized (4);
/* Create blue bpath */
dc->blue_bpath = sp_canvas_bpath_new (SP_DT_SKETCH (ec->desktop), NULL);
sp_canvas_bpath_set_stroke (SP_CANVAS_BPATH (dc->blue_bpath), dc->blue_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
/* Create blue curve */
dc->blue_curve = sp_curve_new_sized (8);
/* Create green curve */
dc->green_curve = sp_curve_new_sized (64);
/* No green anchor by default */
dc->green_anchor = NULL;
spdc_set_attach (dc, FALSE);
}
void Inkscape::Rubberband::move(Geom::Point const &p)
{
if (!_started)
return;
_end = p;
_desktop->scroll_to_point(p);
_touchpath_curve->lineto(p);
Geom::Point next = _desktop->d2w(p);
// we want the points to be at most 0.5 screen pixels apart,
// so that we don't lose anything small;
// if they are farther apart, we interpolate more points
if (_points.size() > 0 && Geom::L2(next-_points.back()) > 0.5) {
Geom::Point prev = _points.back();
int subdiv = 2 * (int) round(Geom::L2(next-prev) + 0.5);
for (int i = 1; i <= subdiv; i ++) {
_points.push_back(prev + ((double)i/subdiv) * (next - prev));
}
} else {
_points.push_back(next);
}
if (_mode == RUBBERBAND_MODE_RECT) {
if (_rect == NULL) {
_rect = static_cast<CtrlRect *>(sp_canvas_item_new(sp_desktop_controls(_desktop), SP_TYPE_CTRLRECT, NULL));
}
_rect->setRectangle(Geom::Rect(_start, _end));
sp_canvas_item_show(_rect);
if (_touchpath)
sp_canvas_item_hide(_touchpath);
} else if (_mode == RUBBERBAND_MODE_TOUCHPATH) {
if (_touchpath == NULL) {
_touchpath = sp_canvas_bpath_new(sp_desktop_sketch(_desktop), NULL);
sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(_touchpath), 0xff0000ff, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
sp_canvas_bpath_set_fill(SP_CANVAS_BPATH(_touchpath), 0, SP_WIND_RULE_NONZERO);
}
sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(_touchpath), _touchpath_curve);
sp_canvas_item_show(_touchpath);
if (_rect)
sp_canvas_item_hide(_rect);
}
}
static void
fit_and_split (SPDrawContext * dc)
{
NRPointF b[4];
gdouble tolerance;
g_assert (dc->npoints > 1);
tolerance = SP_EVENT_CONTEXT (dc)->desktop->w2d[0] * TOLERANCE;
tolerance = tolerance * tolerance;
if (sp_bezier_fit_cubic (b, dc->p, dc->npoints, tolerance) > 0 && dc->npoints < SP_DRAW_POINTS_MAX) {
/* Fit and draw and reset state */
sp_curve_reset (dc->red_curve);
sp_curve_moveto (dc->red_curve, b[0].x, b[0].y);
sp_curve_curveto (dc->red_curve, b[1].x, b[1].y, b[2].x, b[2].y, b[3].x, b[3].y);
sp_canvas_bpath_set_bpath (SP_CANVAS_BPATH (dc->red_bpath), dc->red_curve);
} else {
SPCurve *curve;
SPCanvasItem *cshape;
/* Fit and draw and copy last point */
g_assert (!sp_curve_empty (dc->red_curve));
sp_curve_append_continuous (dc->green_curve, dc->red_curve, 0.0625);
curve = sp_curve_copy (dc->red_curve);
/* fixme: */
cshape = sp_canvas_bpath_new (SP_DT_SKETCH (SP_EVENT_CONTEXT (dc)->desktop), curve);
sp_curve_unref (curve);
sp_canvas_bpath_set_stroke (SP_CANVAS_BPATH (cshape), dc->green_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
dc->green_bpaths = g_slist_prepend (dc->green_bpaths, cshape);
dc->p[0] = dc->p[dc->npoints - 2];
dc->p[1] = dc->p[dc->npoints - 1];
dc->npoints = 2;
}
}
