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#include "DelegateChooser.h"
#include "Logging.h"
// uses private API, which moved between versions
#include <QQmlEngine>
#include <QtGlobal>
QQmlComponent *
DelegateChoice::delegate() const
{
return delegate_;
}
void
DelegateChoice::setDelegate(QQmlComponent *delegate)
{
if (delegate != delegate_) {
delegate_ = delegate;
emit delegateChanged();
emit changed();
}
}
QVariant
DelegateChoice::roleValue() const
{
return roleValue_;
}
void
DelegateChoice::setRoleValue(const QVariant &value)
{
if (value != roleValue_) {
roleValue_ = value;
emit roleValueChanged();
emit changed();
}
}
QVariant
DelegateChooser::roleValue() const
{
return roleValue_;
}
void
DelegateChooser::setRoleValue(const QVariant &value)
{
if (value != roleValue_) {
roleValue_ = value;
recalcChild();
emit roleValueChanged();
}
}
QQmlListProperty<DelegateChoice>
DelegateChooser::choices()
{
return QQmlListProperty<DelegateChoice>(this,
this,
&DelegateChooser::appendChoice,
&DelegateChooser::choiceCount,
&DelegateChooser::choice,
&DelegateChooser::clearChoices);
}
void
DelegateChooser::appendChoice(QQmlListProperty<DelegateChoice> *p, DelegateChoice *c)
{
DelegateChooser *dc = static_cast<DelegateChooser *>(p->object);
dc->choices_.append(c);
}
int
DelegateChooser::choiceCount(QQmlListProperty<DelegateChoice> *p)
{
return static_cast<DelegateChooser *>(p->object)->choices_.count();
}
DelegateChoice *
DelegateChooser::choice(QQmlListProperty<DelegateChoice> *p, int index)
{
return static_cast<DelegateChooser *>(p->object)->choices_.at(index);
}
void
DelegateChooser::clearChoices(QQmlListProperty<DelegateChoice> *p)
{
static_cast<DelegateChooser *>(p->object)->choices_.clear();
}
void
DelegateChooser::recalcChild()
{
for (const auto choice : choices_) {
auto choiceValue = choice->roleValue();
if (!roleValue_.isValid() || !choiceValue.isValid() || choiceValue == roleValue_) {
if (child) {
child->setParentItem(nullptr);
child = nullptr;
}
choice->delegate()->create(incubator, QQmlEngine::contextForObject(this));
return;
}
}
}
void
DelegateChooser::componentComplete()
{
QQuickItem::componentComplete();
recalcChild();
}
void
DelegateChooser::DelegateIncubator::statusChanged(QQmlIncubator::Status status)
{
if (status == QQmlIncubator::Ready) {
chooser.child = dynamic_cast<QQuickItem *>(object());
if (chooser.child == nullptr) {
nhlog::ui()->error("Delegate has to be derived of Item!");
return;
}
chooser.child->setParentItem(&chooser);
connect(chooser.child, &QQuickItem::heightChanged, &chooser, [this]() {
chooser.setHeight(chooser.child->height());
});
chooser.setHeight(chooser.child->height());
QQmlEngine::setObjectOwnership(chooser.child,
QQmlEngine::ObjectOwnership::JavaScriptOwnership);
} else if (status == QQmlIncubator::Error) {
for (const auto &e : errors())
nhlog::ui()->error("Error instantiating delegate: {}",
e.toString().toStdString());
}
}
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