void Drop::dropEvent(QDropEvent *event)
{
if (!m_data->widget)
return;
const std::string str = event->mimeData()->text().toStdString();
try
{
TypeDescriptor_ptr descriptor =
m_data->widget->getReflective();
Holder holder = descriptor->create_holder();
bool res = json::parse(descriptor, holder,
str.c_str(), str.size());
if (res && m_data->widget)
{
m_data->widget->fromHolder(holder);
event->acceptProposedAction();
}
}
catch(...)
{
// parse exception: nothing to do
}
}
void Drag::mouseMoveEvent(QMouseEvent *event)
{
if (!m_data->widget)
return;
if (!(event->buttons() & Qt::LeftButton))
return;
if ((event->globalPos() - m_data->dragStartPosition).manhattanLength()
< QApplication::startDragDistance())
return;
TypeDescriptor_ptr descriptor =
m_data->widget->getReflective();
Holder holder (descriptor->create_holder());
m_data->widget->toHolder(holder);
if (core::utils::calculate_size(holder) < GSIM_DRAG_MAX_SIZE)
{
QDrag * drag = new QDrag(m_data->qwidget);
QMimeData * mimeData = new QMimeData;
std::ostringstream oss;
json::write(oss, descriptor, holder);
mimeData->setText(oss.str().c_str());
drag->setMimeData(mimeData);
/* Qt::DropAction dropAction = */ drag->exec(Qt::CopyAction);
}
else
{
QMessageBox::information(m_data->qwidget, "Information",
"Drag events have been disabled for performance reasons.");
}
}
