File size: 4,216 Bytes
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* SVG <switch> implementation
*
* Authors:
* Andrius R. <knutux@gmail.com>
* MenTaLguY <mental@rydia.net>
* Jon A. Cruz <jon@joncruz.org>
* Abhishek Sharma
*
* Copyright (C) 2006 authors
*
* Released under GNU GPL, read the file 'COPYING' for more information
*/
#include <glibmm/i18n.h>
#include "sp-switch.h"
#include "display/drawing-group.h"
#include "conditions.h"
#include <sigc++/functors/ptr_fun.h>
#include <sigc++/adaptors/bind.h>
SPSwitch::SPSwitch() : SPGroup() {
this->_cached_item = 0;
}
SPSwitch::~SPSwitch() {
_releaseLastItem(_cached_item);
}
SPObject *SPSwitch::_evaluateFirst() {
SPObject *first = 0;
for (SPObject *child = this->firstChild() ; child && !first ; child = child->getNext() ) {
if (SP_IS_ITEM(child) && sp_item_evaluate(SP_ITEM(child))) {
first = child;
}
}
return first;
}
std::vector<SPObject*> SPSwitch::_childList(bool add_ref, SPObject::Action action) {
if ( action != SPObject::ActionGeneral ) {
return this->childList(add_ref, action);
}
SPObject *child = _evaluateFirst();
std::vector<SPObject*> x;
if (NULL == child)
return x;
if (add_ref) {
//g_object_ref (G_OBJECT (child));
sp_object_ref(child);
}
x.push_back(child);
return x;
}
const char *SPSwitch::displayName() const {
return _("Conditional Group");
}
gchar *SPSwitch::description() const {
gint len = this->getItemCount();
return g_strdup_printf(
ngettext(_("of <b>%d</b> object"), _("of <b>%d</b> objects"), len), len);
}
void SPSwitch::child_added(Inkscape::XML::Node* child, Inkscape::XML::Node* ref) {
SPGroup::child_added(child, ref);
this->_reevaluate(true);
}
void SPSwitch::remove_child(Inkscape::XML::Node *child) {
SPGroup::remove_child(child);
this->_reevaluate();
}
void SPSwitch::order_changed (Inkscape::XML::Node *child, Inkscape::XML::Node *old_ref, Inkscape::XML::Node *new_ref)
{
SPGroup::order_changed(child, old_ref, new_ref);
this->_reevaluate();
}
void SPSwitch::_reevaluate(bool /*add_to_drawing*/) {
SPObject *evaluated_child = _evaluateFirst();
if (!evaluated_child || _cached_item == evaluated_child) {
return;
}
_releaseLastItem(_cached_item);
std::vector<SPObject*> item_list = _childList(false, SPObject::ActionShow);
for ( std::vector<SPObject*>::const_reverse_iterator iter=item_list.rbegin();iter!=item_list.rend();++iter) {
SPObject *o = *iter;
if ( !SP_IS_ITEM (o) ) {
continue;
}
SPItem * child = SP_ITEM(o);
child->setEvaluated(o == evaluated_child);
}
_cached_item = evaluated_child;
_release_connection = evaluated_child->connectRelease(sigc::bind(sigc::ptr_fun(&SPSwitch::_releaseItem), this));
this->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
}
void SPSwitch::_releaseItem(SPObject *obj, SPSwitch *selection)
{
selection->_releaseLastItem(obj);
}
void SPSwitch::_releaseLastItem(SPObject *obj)
{
if (NULL == this->_cached_item || this->_cached_item != obj)
return;
this->_release_connection.disconnect();
this->_cached_item = NULL;
}
void SPSwitch::_showChildren (Inkscape::Drawing &drawing, Inkscape::DrawingItem *ai, unsigned int key, unsigned int flags) {
SPObject *evaluated_child = this->_evaluateFirst();
std::vector<SPObject*> l = this->_childList(false, SPObject::ActionShow);
for ( std::vector<SPObject*>::const_reverse_iterator iter=l.rbegin();iter!=l.rend();++iter) {
SPObject *o = *iter;
if (SP_IS_ITEM (o)) {
SPItem * child = SP_ITEM(o);
child->setEvaluated(o == evaluated_child);
Inkscape::DrawingItem *ac = child->invoke_show (drawing, key, flags);
if (ac) {
ai->appendChild(ac);
}
}
}
}
/*
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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