/* * SVG implementation * * Authors: * Lauris Kaplinski * Abhishek Sharma * Jon A. Cruz * * Copyright (C) 1999-2002 Lauris Kaplinski * * Released under GNU GPL, read the file 'COPYING' for more information */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include "attributes.h" #include "style.h" #include "sp-line.h" #include "sp-guide.h" #include "display/curve.h" #include #include "xml/repr.h" #include "document.h" #include "inkscape.h" SPShapeClass * SPLineClass::static_parent_class = 0; GType SPLine::sp_line_get_type(void) { static GType line_type = 0; if (!line_type) { GTypeInfo line_info = { sizeof(SPLineClass), NULL, /* base_init */ NULL, /* base_finalize */ (GClassInitFunc) SPLineClass::sp_line_class_init, NULL, /* klass_finalize */ NULL, /* klass_data */ sizeof(SPLine), 16, /* n_preallocs */ (GInstanceInitFunc) init, NULL, /* value_table */ }; line_type = g_type_register_static(SP_TYPE_SHAPE, "SPLine", &line_info,(GTypeFlags)0); } return line_type; } void SPLineClass::sp_line_class_init(SPLineClass *klass) { SPLineClass::static_parent_class = (SPShapeClass *) g_type_class_ref(SP_TYPE_SHAPE); SPObjectClass *sp_object_class = (SPObjectClass *) klass; sp_object_class->build = SPLine::build; sp_object_class->set = SPLine::set; sp_object_class->write = SPLine::write; SPItemClass *item_class = (SPItemClass *) klass; item_class->description = SPLine::getDescription; item_class->set_transform = SPLine::setTransform; item_class->convert_to_guides = SPLine::convertToGuides; sp_object_class->update = SPLine::update; SPShapeClass *shape_class = (SPShapeClass *) klass; shape_class->set_shape = SPLine::setShape; } void SPLine::init(SPLine * line) { line->x1.unset(); line->y1.unset(); line->x2.unset(); line->y2.unset(); } void SPLine::build(SPObject * object, SPDocument * document, Inkscape::XML::Node * repr) { if (((SPObjectClass *) SPLineClass::static_parent_class)->build) { ((SPObjectClass *) SPLineClass::static_parent_class)->build(object, document, repr); } object->readAttr( "x1" ); object->readAttr( "y1" ); object->readAttr( "x2" ); object->readAttr( "y2" ); } void SPLine::set(SPObject *object, unsigned int key, const gchar *value) { SPLine * line = SP_LINE(object); /* fixme: we should really collect updates */ switch (key) { case SP_ATTR_X1: line->x1.readOrUnset(value); object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG); break; case SP_ATTR_Y1: line->y1.readOrUnset(value); object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG); break; case SP_ATTR_X2: line->x2.readOrUnset(value); object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG); break; case SP_ATTR_Y2: line->y2.readOrUnset(value); object->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG); break; default: if (((SPObjectClass *) SPLineClass::static_parent_class)->set) { ((SPObjectClass *) SPLineClass::static_parent_class)->set(object, key, value); } break; } } void SPLine::update(SPObject *object, SPCtx *ctx, guint flags) { if (flags & (SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG | SP_OBJECT_VIEWPORT_MODIFIED_FLAG)) { SPLine *line = SP_LINE(object); SPStyle const *style = object->style; SPItemCtx const *ictx = (SPItemCtx const *) ctx; double const w = ictx->viewport.width(); double const h = ictx->viewport.height(); double const em = style->font_size.computed; double const ex = em * 0.5; // fixme: get from pango or libnrtype. line->x1.update(em, ex, w); line->x2.update(em, ex, w); line->y1.update(em, ex, h); line->y2.update(em, ex, h); ((SPShape *) object)->setShape(); } if (((SPObjectClass *) SPLineClass::static_parent_class)->update) { ((SPObjectClass *) SPLineClass::static_parent_class)->update(object, ctx, flags); } } Inkscape::XML::Node * SPLine::write(SPObject *object, Inkscape::XML::Document *xml_doc, Inkscape::XML::Node *repr, guint flags) { SPLine *line = SP_LINE(object); if ((flags & SP_OBJECT_WRITE_BUILD) && !repr) { repr = xml_doc->createElement("svg:line"); } if (repr != object->getRepr()) { repr->mergeFrom(object->getRepr(), "id"); } sp_repr_set_svg_double(repr, "x1", line->x1.computed); sp_repr_set_svg_double(repr, "y1", line->y1.computed); sp_repr_set_svg_double(repr, "x2", line->x2.computed); sp_repr_set_svg_double(repr, "y2", line->y2.computed); if (((SPObjectClass *) (SPLineClass::static_parent_class))->write) { ((SPObjectClass *) (SPLineClass::static_parent_class))->write(object, xml_doc, repr, flags); } return repr; } gchar * SPLine::getDescription(SPItem */*item*/) { return g_strdup(_("Line")); } void SPLine::convertToGuides(SPItem *item) { SPLine *line = SP_LINE(item); Geom::Point points[2]; Geom::Affine const i2dt(item->i2dt_affine()); points[0] = Geom::Point(line->x1.computed, line->y1.computed)*i2dt; points[1] = Geom::Point(line->x2.computed, line->y2.computed)*i2dt; SPGuide::createSPGuide(item->document, points[0], points[1]); } Geom::Affine SPLine::setTransform(SPItem *item, Geom::Affine const &xform) { SPLine *line = SP_LINE(item); Geom::Point points[2]; points[0] = Geom::Point(line->x1.computed, line->y1.computed); points[1] = Geom::Point(line->x2.computed, line->y2.computed); points[0] *= xform; points[1] *= xform; line->x1.computed = points[0][Geom::X]; line->y1.computed = points[0][Geom::Y]; line->x2.computed = points[1][Geom::X]; line->y2.computed = points[1][Geom::Y]; item->adjust_stroke(xform.descrim()); SP_OBJECT(item)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG); return Geom::identity(); } void SPLine::setShape(SPShape *shape) { SPLine *line = SP_LINE(shape); SPCurve *c = new SPCurve(); c->moveto(line->x1.computed, line->y1.computed); c->lineto(line->x2.computed, line->y2.computed); shape->setCurveInsync(c, TRUE); // *_insync does not call update, avoiding infinite recursion when set_shape is called by update shape->setCurveBeforeLPE(c); // LPE's cannot be applied to lines. (the result can (generally) not be represented as SPLine) c->unref(); } /* Local Variables: mode:c++ c-file-style:"stroustrup" c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +)) indent-tabs-mode:nil fill-column:99 End: */ // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 :