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/*
* Inkscape::ShapeEditor
*
* Authors:
* bulia byak <buliabyak@users.sf.net>
* Krzysztof Kosiński <tweenk.pl@gmail.com>
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include <glibmm/i18n.h>
#include "sp-object.h"
#include "sp-item.h"
#include "sp-lpe-item.h"
#include "live_effects/lpeobject.h"
#include "selection.h"
#include "desktop.h"
#include "document.h"
#include "desktop-handles.h"
#include "knotholder.h"
#include "live_effects/parameter/point.h"
#include "xml/node-event-vector.h"
#include "preferences.h"
#include "object-edit.h"
#include "style.h"
#include "display/curve.h"
#include <2geom/pathvector.h>
#include "shape-editor.h"
ShapeEditor::ShapeEditor(SPDesktop *dt) {
this->desktop = dt;
this->knotholder = NULL;
this->knotholder_listener_attached_for = NULL;
}
ShapeEditor::~ShapeEditor() {
unset_item(SH_KNOTHOLDER);
}
void ShapeEditor::unset_item(SubType type, bool keep_knotholder) {
Inkscape::XML::Node *old_repr = NULL;
switch (type) {
case SH_NODEPATH:
// defunct
break;
case SH_KNOTHOLDER:
if (this->knotholder) {
old_repr = this->knotholder->repr;
if (old_repr && old_repr == knotholder_listener_attached_for) {
sp_repr_remove_listener_by_data(old_repr, this);
Inkscape::GC::release(old_repr);
knotholder_listener_attached_for = NULL;
}
if (!keep_knotholder) {
delete this->knotholder;
this->knotholder = NULL;
}
}
break;
}
}
bool ShapeEditor::has_nodepath () {
return false;
}
bool ShapeEditor::has_knotholder () {
return (this->knotholder != NULL);
}
void ShapeEditor::update_knotholder () {
if (this->knotholder)
this->knotholder->update_knots();
}
bool ShapeEditor::has_local_change (SubType type) {
switch (type) {
case SH_NODEPATH:
// defunct
return false;
case SH_KNOTHOLDER:
return (this->knotholder && this->knotholder->local_change != 0);
default:
g_assert_not_reached();
}
}
void ShapeEditor::decrement_local_change (SubType type) {
switch (type) {
case SH_NODEPATH:
// defunct
break;
case SH_KNOTHOLDER:
if (this->knotholder) {
this->knotholder->local_change = FALSE;
}
break;
default:
g_assert_not_reached();
}
}
const SPItem *ShapeEditor::get_item (SubType type) {
const SPItem *item = NULL;
switch (type) {
case SH_NODEPATH:
// defunct
break;
case SH_KNOTHOLDER:
if (this->has_knotholder()) {
item = this->knotholder->getItem();
}
break;
}
return item;
}
GList *ShapeEditor::save_nodepath_selection () {
// defunct stub
return NULL;
}
void ShapeEditor::restore_nodepath_selection (GList */*saved*/) {
// defunct stub
}
void ShapeEditor::shapeeditor_event_attr_changed(gchar const *name)
{
gboolean changed_kh = FALSE;
if (has_knotholder())
{
changed_kh = !has_local_change(SH_KNOTHOLDER);
decrement_local_change(SH_KNOTHOLDER);
if (changed_kh) {
// this can happen if an LPEItem's knotholder handle was dragged, in which case we want
// to keep the knotholder; in all other cases (e.g., if the LPE itself changes) we delete it
reset_item(SH_KNOTHOLDER, !strcmp(name, "d"));
}
}
}
static void shapeeditor_event_attr_changed(Inkscape::XML::Node */*repr*/, gchar const *name,
gchar const */*old_value*/, gchar const */*new_value*/,
bool /*is_interactive*/, gpointer data)
{
g_assert(data);
ShapeEditor *sh = ((ShapeEditor *) data);
sh->shapeeditor_event_attr_changed(name);
}
static Inkscape::XML::NodeEventVector shapeeditor_repr_events = {
NULL, /* child_added */
NULL, /* child_removed */
shapeeditor_event_attr_changed,
NULL, /* content_changed */
NULL /* order_changed */
};
void ShapeEditor::set_item(SPItem *item, SubType type, bool keep_knotholder) {
// this happens (and should only happen) when for an LPEItem having both knotholder and
// nodepath the knotholder is adapted; in this case we don't want to delete the knotholder
// since this freezes the handles
unset_item(type, keep_knotholder);
if (item) {
Inkscape::XML::Node *repr;
switch(type) {
case SH_NODEPATH:
// defunct
break;
case SH_KNOTHOLDER:
if (!this->knotholder) {
// only recreate knotholder if none is present
this->knotholder = sp_item_knot_holder(item, desktop);
}
if (this->knotholder) {
this->knotholder->update_knots();
// setting new listener
repr = this->knotholder->repr;
if (repr != knotholder_listener_attached_for) {
Inkscape::GC::anchor(repr);
sp_repr_add_listener(repr, &shapeeditor_repr_events, this);
knotholder_listener_attached_for = repr;
}
}
break;
}
}
}
/** FIXME: This thing is only called when the item needs to be updated in response to repr change.
Why not make a reload function in NodePath and in KnotHolder? */
void ShapeEditor::reset_item (SubType type, bool keep_knotholder)
{
switch (type) {
case SH_NODEPATH:
// defunct
break;
case SH_KNOTHOLDER:
if ( knotholder ) {
SPObject *obj = sp_desktop_document(desktop)->getObjectByRepr(knotholder_listener_attached_for); /// note that it is not certain that this is an SPItem; it could be a LivePathEffectObject.
set_item(SP_ITEM(obj), SH_KNOTHOLDER, keep_knotholder);
}
break;
}
}
void ShapeEditor::nodepath_destroyed () {
}
bool ShapeEditor::has_selection() {
return false; // so far, knotholder cannot have selection
}
/**
* \brief Returns true if this ShapeEditor has a knot above which the mouse currently hovers
*/
bool ShapeEditor::knot_mouseover()
{
if (this->knotholder) {
return knotholder->knot_mouseover();
}
return false;
}
/*
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 :
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