void
StarKnotHolderEntity1::knot_set(Geom::Point const &p, Geom::Point const &/*origin*/, guint state)
{
SPStar *star = SP_STAR(item);
Geom::Point const s = snap_knot_position(p, state);
Geom::Point d = s - star->center;
double arg1 = atan2(d);
double darg1 = arg1 - star->arg[0];
if (state & GDK_MOD1_MASK) {
star->randomized = darg1/(star->arg[0] - star->arg[1]);
} else if (state & GDK_SHIFT_MASK) {
star->rounded = darg1/(star->arg[0] - star->arg[1]);
} else if (state & GDK_CONTROL_MASK) {
star->r[0] = L2(d);
} else {
star->r[0] = L2(d);
star->arg[0] = arg1;
star->arg[1] += darg1;
}
(static_cast<SPObject *>(star))->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
}
void
PatternKnotHolderEntityScale::knot_set(Geom::Point const &p, Geom::Point const &/*origin*/, guint state)
{
SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
// FIXME: this snapping should be done together with knowing whether control was pressed. If GDK_CONTROL_MASK, then constrained snapping should be used.
Geom::Point p_snapped = snap_knot_position(p, state);
// get angle from current transform
gdouble theta = sp_pattern_extract_theta(pat);
// Get the new scale from the position of the knotholder
Geom::Point d = p_snapped - sp_pattern_extract_trans(pat);
gdouble pat_x = pattern_width(pat);
gdouble pat_y = pattern_height(pat);
Geom::Scale scl(1);
if ( state & GDK_CONTROL_MASK ) {
// if ctrl is pressed: use 1:1 scaling
gdouble pat_h = hypot(pat_x, pat_y);
scl = Geom::Scale(d.length() / pat_h);
} else {
d *= Geom::Rotate(-theta);
scl = Geom::Scale(d[Geom::X] / pat_x, d[Geom::Y] / pat_y);
}
Geom::Affine rot = (Geom::Affine)scl * Geom::Rotate(theta);
Geom::Point const t = sp_pattern_extract_trans(pat);
rot[4] = t[Geom::X];
rot[5] = t[Geom::Y];
item->adjust_pattern(rot, true);
item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
}
void
Box3DKnotHolderEntityCenter::knot_set(Geom::Point const &new_pos, Geom::Point const &origin, guint state)
{
Geom::Point const s = snap_knot_position(new_pos, state);
SPBox3D *box = SP_BOX3D(item);
Geom::Affine const i2dt (item->i2dt_affine ());
box3d_set_center (SP_BOX3D(item), s * i2dt, origin * i2dt, !(state & GDK_SHIFT_MASK) ? Box3D::XY : Box3D::Z,
state & GDK_CONTROL_MASK);
box3d_set_z_orders(box);
box3d_position_set(box);
}
void
ArcKnotHolderEntityRY::knot_set(Geom::Point const &p, Geom::Point const &/*origin*/, guint state)
{
SPGenericEllipse *ge = SP_GENERICELLIPSE(item);
Geom::Point const s = snap_knot_position(p, state);
ge->ry.computed = fabs( ge->cy.computed - s[Geom::Y] );
if ( state & GDK_CONTROL_MASK ) {
ge->rx.computed = ge->ry.computed;
}
(static_cast<SPObject *>(item))->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
}
void
KnotHolderEntityEnd::bisector_end_set(Geom::Point const &p, guint state, bool left) {
LPEPerpBisector *lpe = dynamic_cast<LPEPerpBisector *>(_effect);
if (!lpe) return;
Geom::Point const s = snap_knot_position(p, state);
double lambda = Geom::nearest_point(s, lpe->M, lpe->perp_dir);
if (left) {
lpe->C = lpe->M + lpe->perp_dir * lambda;
lpe->length_left.param_set_value(lambda);
} else {
lpe->D = lpe->M + lpe->perp_dir * lambda;
lpe->length_right.param_set_value(-lambda);
}
// FIXME: this should not directly ask for updating the item. It should write to SVG, which triggers updating.
sp_lpe_item_update_patheffect (SP_LPE_ITEM(item), true, true);
}
void
Box3DKnotHolderEntity::knot_set_generic(SPItem *item, unsigned int knot_id, Geom::Point const &new_pos, guint state)
{
Geom::Point const s = snap_knot_position(new_pos, state);
g_assert(item != NULL);
SPBox3D *box = SP_BOX3D(item);
Geom::Affine const i2dt (item->i2dt_affine ());
Box3D::Axis movement;
if ((knot_id < 4) != (state & GDK_SHIFT_MASK)) {
movement = Box3D::XY;
} else {
movement = Box3D::Z;
}
box3d_set_corner (box, knot_id, s * i2dt, movement, (state & GDK_CONTROL_MASK));
box3d_set_z_orders(box);
box3d_position_set(box);
}
void
PointParamKnotHolderEntity::knot_set(Geom::Point const &p, Geom::Point const &origin, guint state)
{
Geom::Point s = snap_knot_position(p, state);
if (state & GDK_CONTROL_MASK) {
Geom::Point A(origin[Geom::X],p[Geom::Y]);
Geom::Point B(p[Geom::X],origin[Geom::Y]);
double distanceA = Geom::distance(A,p);
double distanceB = Geom::distance(B,p);
if(distanceA > distanceB){
s = B;
} else {
s = A;
}
}
pparam->param_setValue(s, true);
SPLPEItem * splpeitem = dynamic_cast<SPLPEItem *>(item);
if(splpeitem){
sp_lpe_item_update_patheffect(splpeitem, false, false);
}
}
void
PatternKnotHolderEntityXY::knot_set(Geom::Point const &p, Geom::Point const &origin, guint state)
{
SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style));
// FIXME: this snapping should be done together with knowing whether control was pressed. If GDK_CONTROL_MASK, then constrained snapping should be used.
Geom::Point p_snapped = snap_knot_position(p, state);
if ( state & GDK_CONTROL_MASK ) {
if (fabs((p - origin)[Geom::X]) > fabs((p - origin)[Geom::Y])) {
p_snapped[Geom::Y] = origin[Geom::Y];
} else {
p_snapped[Geom::X] = origin[Geom::X];
}
}
if (state) {
Geom::Point const q = p_snapped - sp_pattern_extract_trans(pat);
item->adjust_pattern(Geom::Affine(Geom::Translate(q)));
}
item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
}
virtual void knot_set(Geom::Point const &p, Geom::Point const &/*origin*/, guint /*state*/) {
Geom::Point const s = snap_knot_position(p);
param->setOrigin(s);
sp_lpe_item_update_patheffect(SP_LPE_ITEM(item), false, false);
};
void
RectKnotHolderEntityXY::knot_set(Geom::Point const &p, Geom::Point const &origin, guint state)
{
SPRect *rect = SP_RECT(item);
// opposite corner (unmoved)
gdouble opposite_x = (rect->x.computed + rect->width.computed);
gdouble opposite_y = (rect->y.computed + rect->height.computed);
// original width/height when drag started
gdouble w_orig = opposite_x - origin[Geom::X];
gdouble h_orig = opposite_y - origin[Geom::Y];
Geom::Point s = p;
Geom::Point p_handle(rect->x.computed, rect->y.computed);
// mouse displacement since drag started
gdouble minx = p[Geom::X] - origin[Geom::X];
gdouble miny = p[Geom::Y] - origin[Geom::Y];
if (state & GDK_CONTROL_MASK) {
//original ratio
gdouble ratio = (w_orig / h_orig);
if (fabs(minx) > fabs(miny)) {
// snap to horizontal or diagonal
if (minx != 0 && fabs(miny/minx) > 0.5 * 1/ratio && (SGN(minx) == SGN(miny))) {
// closer to the diagonal and in same-sign quarters, change both using ratio
s = snap_knot_position_constrained(p, Inkscape::Snapper::SnapConstraint(p_handle, Geom::Point(-ratio, -1)), state);
minx = s[Geom::X] - origin[Geom::X];
miny = s[Geom::Y] - origin[Geom::Y];
rect->y.computed = MIN(origin[Geom::Y] + minx / ratio, opposite_y);
rect->height.computed = MAX(h_orig - minx / ratio, 0);
} else {
// closer to the horizontal, change only width, height is h_orig
s = snap_knot_position_constrained(p, Inkscape::Snapper::SnapConstraint(p_handle, Geom::Point(-1, 0)), state);
minx = s[Geom::X] - origin[Geom::X];
miny = s[Geom::Y] - origin[Geom::Y];
rect->y.computed = MIN(origin[Geom::Y], opposite_y);
rect->height.computed = MAX(h_orig, 0);
}
rect->x.computed = MIN(s[Geom::X], opposite_x);
rect->width.computed = MAX(w_orig - minx, 0);
} else {
// snap to vertical or diagonal
if (miny != 0 && fabs(minx/miny) > 0.5 *ratio && (SGN(minx) == SGN(miny))) {
// closer to the diagonal and in same-sign quarters, change both using ratio
s = snap_knot_position_constrained(p, Inkscape::Snapper::SnapConstraint(p_handle, Geom::Point(-ratio, -1)), state);
minx = s[Geom::X] - origin[Geom::X];
miny = s[Geom::Y] - origin[Geom::Y];
rect->x.computed = MIN(origin[Geom::X] + miny * ratio, opposite_x);
rect->width.computed = MAX(w_orig - miny * ratio, 0);
} else {
// closer to the vertical, change only height, width is w_orig
s = snap_knot_position_constrained(p, Inkscape::Snapper::SnapConstraint(p_handle, Geom::Point(0, -1)), state);
minx = s[Geom::X] - origin[Geom::X];
miny = s[Geom::Y] - origin[Geom::Y];
rect->x.computed = MIN(origin[Geom::X], opposite_x);
rect->width.computed = MAX(w_orig, 0);
}
rect->y.computed = MIN(s[Geom::Y], opposite_y);
rect->height.computed = MAX(h_orig - miny, 0);
}
rect->width._set = rect->height._set = rect->x._set = rect->y._set = true;
} else {
// move freely
s = snap_knot_position(p, state);
minx = s[Geom::X] - origin[Geom::X];
miny = s[Geom::Y] - origin[Geom::Y];
rect->x.computed = MIN(s[Geom::X], opposite_x);
rect->width.computed = MAX(w_orig - minx, 0);
rect->y.computed = MIN(s[Geom::Y], opposite_y);
rect->height.computed = MAX(h_orig - miny, 0);
rect->width._set = rect->height._set = rect->x._set = rect->y._set = true;
}
sp_rect_clamp_radii(rect);
update_knot();
(static_cast<SPObject *>(rect))->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
}