void WTreeNode::expand()
{
if (!isExpanded()) {
if (!childrenLoaded_) {
loadChildren();
}
/*
* Happens if expandable() for an unpopulated node returned true,
* but after populate(), there were no children: update the node to
* reflect that in fact this node cannot be expanded after all
*/
if (parentNode() && childNodes_.empty()) {
parentNode()->resetLearnedSlots();
update();
}
if (loadPolicy_ == NextLevelLoading)
loadGrandChildren();
doExpand();
updateChildren();
}
}
void WTreeNode::expand()
{
if (!expanded()) {
if (!childrenLoaded_) {
loadChildren();
}
if (loadPolicy_ == NextLevelLoading)
loadGrandChildren();
doExpand();
}
}
void WTreeNode::setLoadPolicy(LoadPolicy loadPolicy)
{
loadPolicy_ = loadPolicy;
switch (loadPolicy) {
case PreLoading:
loadChildren();
break;
case NextLevelLoading:
if (isExpanded()) {
loadChildren();
loadGrandChildren();
} else {
WTreeNode *parent = parentNode();
if (parent && parent->isExpanded())
loadChildren();
expandIcon_
->icon1Clicked().connect(this, &WTreeNode::loadGrandChildren);
}
break;
case LazyLoading:
if (isExpanded())
loadChildren();
else {
if (childCountPolicy_ == Enabled) {
WTreeNode *parent = parentNode();
if (parent && parent->isExpanded())
doPopulate();
}
expandIcon_->icon1Clicked().connect(this, &WTreeNode::expand);
}
}
if (loadPolicy_ != LazyLoading) {
for (unsigned i = 0; i < childNodes_.size(); ++i)
childNodes_[i]->setLoadPolicy(loadPolicy_);
}
}
void WTreeNode::setLoadPolicy(LoadPolicy loadPolicy)
{
loadPolicy_ = loadPolicy;
switch (loadPolicy) {
case PreLoading:
loadChildren();
break;
case NextLevelLoading:
if (expanded()) {
loadChildren();
loadGrandChildren();
} else {
if (parentNode_ && parentNode_->expanded())
loadChildren();
expandIcon_
->icon1Clicked.connect(SLOT(this, WTreeNode::loadGrandChildren));
}
break;
case LazyLoading:
if (expanded())
loadChildren();
else {
if (parentNode_ && parentNode_->expanded()) {
if (!populated_) {
populate();
populated_= true;
}
}
expandIcon_->icon1Clicked.connect(SLOT(this, WTreeNode::expand));
}
}
if (loadPolicy_ != LazyLoading) {
for (unsigned i = 0; i < childNodes_.size(); ++i)
childNodes_[i]->setLoadPolicy(loadPolicy_);
}
}
