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/*
* SVG <line> implementation
*
* Authors:
* Lauris Kaplinski <lauris@kaplinski.com>
* Abhishek Sharma
* Jon A. Cruz <jon@joncruz.org>
*
* 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 <glibmm/i18n.h>
#include "xml/repr.h"
#include "document.h"
#include "inkscape.h"
static void sp_line_build(SPObject * object, SPDocument * document, Inkscape::XML::Node * repr);
static void sp_line_set(SPObject *object, unsigned int key, const gchar *value);
static Inkscape::XML::Node* sp_line_write(SPObject *object, Inkscape::XML::Document *doc, Inkscape::XML::Node *repr, guint flags);
static void sp_line_update(SPObject *object, SPCtx *ctx, guint flags);
static gchar* sp_line_get_description(SPItem * item);
static Geom::Affine sp_line_set_transform(SPItem *item, Geom::Affine const &xform);
static void sp_line_set_shape(SPShape *shape);
static void sp_line_convert_to_guides(SPItem *item);
G_DEFINE_TYPE(SPLine, sp_line, SP_TYPE_SHAPE);
static void
sp_line_class_init(SPLineClass *klass)
{
SPObjectClass *sp_object_class = (SPObjectClass *) klass;
SPItemClass *item_class = (SPItemClass *) klass;
SPShapeClass *shape_class = (SPShapeClass *) klass;
sp_object_class->build = sp_line_build;
sp_object_class->set = sp_line_set;
sp_object_class->write = sp_line_write;
sp_object_class->update = sp_line_update;
item_class->description = sp_line_get_description;
item_class->set_transform = sp_line_set_transform;
item_class->convert_to_guides = sp_line_convert_to_guides;
shape_class->set_shape = sp_line_set_shape;
}
static void
sp_line_init(SPLine * line)
{
line->x1.unset();
line->y1.unset();
line->x2.unset();
line->y2.unset();
}
static void
sp_line_build(SPObject * object, SPDocument * document, Inkscape::XML::Node * repr)
{
if (((SPObjectClass *) sp_line_parent_class)->build) {
((SPObjectClass *) sp_line_parent_class)->build(object, document, repr);
}
object->readAttr( "x1" );
object->readAttr( "y1" );
object->readAttr( "x2" );
object->readAttr( "y2" );
}
static void
sp_line_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 *) sp_line_parent_class)->set) {
((SPObjectClass *) sp_line_parent_class)->set(object, key, value);
}
break;
}
}
static void
sp_line_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 *) sp_line_parent_class)->update) {
((SPObjectClass *) sp_line_parent_class)->update(object, ctx, flags);
}
}
static Inkscape::XML::Node*
sp_line_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 *) (sp_line_parent_class))->write) {
((SPObjectClass *) (sp_line_parent_class))->write(object, xml_doc, repr, flags);
}
return repr;
}
static gchar*
sp_line_get_description(SPItem * /*item*/)
{
return g_strdup(_("<b>Line</b>"));
}
static void
sp_line_convert_to_guides(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]);
}
static Geom::Affine
sp_line_set_transform(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();
}
static void
sp_line_set_shape(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 :
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