我将复选框项添加到列表视图中。
然后,当我更改复选框指示符时,未选中项目行。 当我在列表中选择一个项目时,复选框指示符不会发生变化。
应在项目选择行上选中/取消选中复选框指示符,复选框指示符选择应设置所选项目行。
列表视图init:
QListView *poListView = new QListView(this);
// Create list view item model
QStandardItemModel* poModel =
new QStandardItemModel(poListView);
QStandardItem *poListItem = new QStandardItem;
// Checkable item
poListItem->setCheckable( true );
// Uncheck the item
poListItem->setCheckState(Qt::Unchecked);
// Save checke state
poListItem->setData(Qt::Unchecked, Qt::CheckStateRole);
poModel->setItem(0, poListItem);
poListView->setModel(poModel);
有什么建议吗?
答案 0 :(得分:1)
通过连接两个信号解决了这个问题
这是我的代码:
void MyClass:Init()
{
m_poListView = new QListView(this);
// Set single selection mode
m_poListView->setSelectionMode(
QAbstractItemView::SingleSelection);
// Create list view item model
QStandardItemModel* poModel =
new QStandardItemModel(m_poListView);
QStandardItem * poListItem =
new QStandardItem;
// Checkable item
poListItem->setCheckable( true );
// Save checke state
poListItem->setData(Qt::Unchecked, Qt::CheckStateRole);
poModel->setItem(0, poListItem);
m_poListView->setModel(poModel);
// Register model item changed signal
connect(poModel, SIGNAL(itemChanged(QStandardItem*)),
this, SLOT (SlotItemChanged(QStandardItem*)));
// Resister view item acticated
connect( m_poListView , SIGNAL(activated(const QModelIndex & )),
this, SLOT(SlotListItemActivated(const QModelIndex & )))
}
插槽实现:
void MyClass::SlotItemChanged(QStandardItem *poItem)
{
// Get current index from item
const QModelIndex oCurrentIndex =
poItemChanged->model()->indexFromItem(poItem);
// Get list selection model
QItemSelectionModel *poSelModel =
m_poListView->selectionModel();
// Set selection
poSelModel->select(
QItemSelection(oCurrentIndex, oCurrentIndex),
QItemSelectionModel::Select | QItemSelectionModel::Current);
}
void MyClass::SlotListItemActivated(const QModelIndex &oIndex)
{
Qt::CheckState eCheckState = Qt::Unchecked;
// Get item's check state
bool bChecked =
oIndex.data(Qt::CheckStateRole).toBool();
// Item checked ?
if (bChecked == false)
eCheckState = Qt::Checked;
else
eCheckState = Qt::Unchecked;
// Get index model
// Note: I used QSortFilterProxyModel in the original code
QSortFilterProxyModel *poModel =
(QSortFilterProxyModel *)oIndex.model();
// Update model data
poModel->setData(oIndex, eCheckState, Qt::CheckStateRole);
}
答案 1 :(得分:0)
您必须连接itemChanged
的{{1}}信号并在那里手动选择项目。
如果您希望选中复选框,则还必须连接QStandardItemModel
的{{1}}信号,然后选中/取消选中项目。
此外,您不需要手动设置selectionChanged
。
使用C ++ 11和lambdas,如下所示:
QListView::selectionModel()
或使用旧的Qt::CheckStageRole
语法:
connect(poModel, &QStandardItemModel::itemChanged, [poListView, poModel](QStandardItem * item) {
const QModelIndex index = poModel->indexFromItem(item);
QItemSelectionModel *selModel = poListView->selectionModel();
selModel->select(QItemSelection(index, index), item->checkState() == Qt::Checked ? QItemSelectionModel::Select : QItemSelectionModel::Deselect);
});
connect(poListView->selectionModel(), &QItemSelectionModel::selectionChanged, [poModel](const QItemSelection &selected, const QItemSelection &deselected) {
for (const QModelIndex &index : selected.indexes()) {
poModel->itemFromIndex(index)->setCheckState(Qt::Checked);
}
for (const QModelIndex &index : deselected.indexes()) {
poModel->itemFromIndex(index)->setCheckState(Qt::Unchecked);
}
});