/**
* Calls any registered handlers for the update_patheffect action
*/
void
sp_lpe_item_update_patheffect (SPLPEItem *lpeitem, bool wholetree, bool write)
{
#ifdef SHAPE_VERBOSE
g_message("sp_lpe_item_update_patheffect: %p\n", lpeitem);
#endif
g_return_if_fail (lpeitem != NULL);
g_return_if_fail (SP_IS_LPE_ITEM (lpeitem));
if (!lpeitem->pathEffectsEnabled())
return;
// TODO: hack! this will be removed when path length measuring is reimplemented in a better way
PathEffectList lpelist = lpeitem->getEffectList();
std::list<Inkscape::LivePathEffect::LPEObjectReference *>::iterator i;
for (i = lpelist.begin(); i != lpelist.end(); ++i) {
if ((*i)->lpeobject) {
Inkscape::LivePathEffect::Effect *lpe = (*i)->lpeobject->get_lpe();
if (dynamic_cast<Inkscape::LivePathEffect::LPEPathLength *>(lpe)) {
if (!lpe->isVisible()) {
// we manually disable text for LPEPathLength
// use static_cast, because we already checked for the right type above
static_cast<Inkscape::LivePathEffect::LPEPathLength *>(lpe)->hideCanvasText();
}
}
}
}
SPLPEItem *top = NULL;
if (wholetree) {
SPLPEItem *prev_parent = lpeitem;
SPLPEItem *parent = dynamic_cast<SPLPEItem*>(prev_parent->parent);
while (parent && parent->hasPathEffectRecursive()) {
prev_parent = parent;
parent = dynamic_cast<SPLPEItem*>(prev_parent->parent);
}
top = prev_parent;
}
else {
top = lpeitem;
}
top->update_patheffect(write);
}
/**
* returns true when LPE was successful.
*/
bool SPLPEItem::performPathEffect(SPCurve *curve) {
if (!this) {
return false;
}
if (!curve) {
return false;
}
if (this->hasPathEffect() && this->pathEffectsEnabled()) {
for (PathEffectList::iterator it = this->path_effect_list->begin(); it != this->path_effect_list->end(); ++it)
{
LivePathEffectObject *lpeobj = (*it)->lpeobject;
if (!lpeobj) {
/** \todo Investigate the cause of this.
* For example, this happens when copy pasting an object with LPE applied. Probably because the object is pasted while the effect is not yet pasted to defs, and cannot be found.
*/
g_warning("SPLPEItem::performPathEffect - NULL lpeobj in list!");
return false;
}
Inkscape::LivePathEffect::Effect *lpe = lpeobj->get_lpe();
if (!lpe) {
/** \todo Investigate the cause of this.
* Not sure, but I think this can happen when an unknown effect type is specified...
*/
g_warning("SPLPEItem::performPathEffect - lpeobj with invalid lpe in the stack!");
return false;
}
if (lpe->isVisible()) {
if (lpe->acceptsNumClicks() > 0 && !lpe->isReady()) {
// if the effect expects mouse input before being applied and the input is not finished
// yet, we don't alter the path
return false;
}
// Groups have their doBeforeEffect called elsewhere
if (!SP_IS_GROUP(this)) {
lpe->doBeforeEffect_impl(this);
}
try {
lpe->doEffect(curve);
}
catch (std::exception & e) {
g_warning("Exception during LPE %s execution. \n %s", lpe->getName().c_str(), e.what());
if (SP_ACTIVE_DESKTOP && SP_ACTIVE_DESKTOP->messageStack()) {
SP_ACTIVE_DESKTOP->messageStack()->flash( Inkscape::WARNING_MESSAGE,
_("An exception occurred during execution of the Path Effect.") );
}
return false;
}
if (!SP_IS_GROUP(this)) {
lpe->doAfterEffect(this);
}
}
}
}
return true;
}