void DirectoryTree::on_locate_directory(int directory_id)
{
DirectoryTreeModel *m = dynamic_cast<DirectoryTreeModel*>(model());
assert(NULL != m);
QModelIndex index = m->directory_index(directory_id);
if (index.isValid())
{
scrollTo(index);
selectionModel()->select(index, QItemSelectionModel::ToggleCurrent);
on_item_selected(index, index);
}
}
void GuiListbox::set_selected_index(int index) {
int old_index = selected_index;
int sz = static_cast<int>(entries.size());
if (index < 0) {
index = -1;
}
if (index >= sz) {
index = sz - 1;
}
selected_index = index;
if (selected_index != old_index && on_item_selected) {
if (index >= 0) {
on_item_selected(this, on_item_selected_data, selected_index);
}
}
}
DirectoryTree::DirectoryTree(QWidget *parent)
: QTreeView(parent)
{
assert(NULL != parent);
// model
PkmPlugin *plugin = dynamic_cast<PkmPlugin*>(get_plugin().pointer());
assert(NULL != plugin);
DirectoryTreeModel *model = new DirectoryTreeModel(plugin->get_data_source()->get_db(), parent);
connect(this, SIGNAL(expanded(QModelIndex)), model, SLOT(on_expanded(QModelIndex)));
connect(this, SIGNAL(collapsed(QModelIndex)), model, SLOT(on_collapsed(QModelIndex)));
setModel(model);
// actions
init_actions();
// menus
init_menus();
// 双击展开而非进入编辑模式
setExpandsOnDoubleClick(true);
setAutoExpandDelay(600); // 拖拽时自动展开节点的延时(ms)
setEditTriggers(EditKeyPressed);
setMinimumWidth(140);
// 隐藏首部
setHeaderHidden(true);
// 拖拽相关
setSelectionMode(QAbstractItemView::SingleSelection); // 单选
setDragEnabled(true); // 允许"拖"
setAcceptDrops(true); // 允许"放"
setDropIndicatorShown(true); // ?
setDragDropMode(QAbstractItemView::DragDrop);
setDefaultDropAction(Qt::MoveAction);
// signals
connect(this, SIGNAL(activated(QModelIndex)), this, SLOT(on_item_activated(QModelIndex)));
// connect(this, SIGNAL(clicked(QModelIndex)), this, SLOT(on_item_activated(QModelIndex)));
connect(selectionModel(), SIGNAL(currentChanged(QModelIndex,QModelIndex)), this, SLOT(on_item_selected(QModelIndex,QModelIndex)));
plugin->locate_directory.connect(this, &DirectoryTree::on_locate_directory);
}