本文整理汇总了C++中PlaylistModel::index方法的典型用法代码示例。如果您正苦于以下问题：C++ PlaylistModel::index方法的具体用法？C++ PlaylistModel::index怎么用？C++ PlaylistModel::index使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类PlaylistModel的用法示例。
在下文中一共展示了PlaylistModel::index方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: moveItems
void PlaylistView::moveItems(int steps)
{
PlaylistModel *playlistModel = dynamic_cast<PlaylistModel *>(this->model());
if (playlistModel == nullptr)
{
return;
}
QItemSelection indexList = this->selectionModel()->selection();
std::sort(indexList.begin(), indexList.end(), steps > 0 ? sortQItemSelectionDesc : sortQItemSelectionAsc);
for (QItemSelection::const_iterator i = indexList.cbegin(); i != indexList.cend(); ++i)
{
int top = i->top();
int btm = i->bottom();
int count = abs(top - btm);
int srcRow = min(top, btm);
int destRow = srcRow + steps;
QModelIndex newIdx = steps > 0 ? playlistModel->index(destRow + count, 0) : playlistModel->index(srcRow - 1, 0);
QModelIndex oldIdx = steps > 0 ? playlistModel->index(srcRow, 0) : playlistModel->index(srcRow + count, 0);
if (newIdx.isValid())
{
this->selectionModel()->select(newIdx, QItemSelectionModel::SelectionFlag::Select | QItemSelectionModel::SelectionFlag::Rows);
this->selectionModel()->select(oldIdx, QItemSelectionModel::SelectionFlag::Deselect | QItemSelectionModel::SelectionFlag::Rows);
playlistModel->moveRows(playlistModel->index(0, 0),
srcRow,
count,
playlistModel->index(playlistModel->rowCount(QModelIndex()) - 1,
playlistModel->columnCount(QModelIndex()) - 1),
destRow);
}
}
}示例2: keyPressEvent
void PlaylistView::keyPressEvent(QKeyEvent *event)
{
PlaylistModel *playlistModel = dynamic_cast<PlaylistModel *>(this->model());
if (playlistModel == nullptr)
{
return;
}
QModelIndex bot = playlistModel->index(playlistModel->rowCount(QModelIndex()) - 1, 0);
QModelIndex top = playlistModel->index(0, 0);
int key = event->key();
switch (key)
{
case Qt::Key_Delete:
{
QItemSelection indexList = this->selectionModel()->selection();
int lastCount = 0;
for (QItemSelection::const_iterator i = indexList.cbegin(); i != indexList.cend(); ++i)
{
int btm = i->bottom();
int top = i->top();
if (btm < 0 || top < 0)
{
break;
}
lastCount = abs(top - btm) + 1;
playlistModel->removeRows(min(btm, top), lastCount);
}
}
break;
case Qt::Key_W:
this->moveItems(-1);
break;
case Qt::Key_S:
this->moveItems(1);
break;
case Qt::Key_Home:
case Qt::Key_End:
if ((event->modifiers() & Qt::ShiftModifier) == Qt::ShiftModifier)
{
QModelIndex cur = this->currentIndex();
QItemSelectionRange aboveCur(top, cur);
QItemSelection selection;
selection.append(aboveCur);
this->selectionModel()->select(selection,
((key == Qt::Key_Home) ? QItemSelectionModel::Select : QItemSelectionModel::Deselect) | QItemSelectionModel::Rows);
selection.clear();
QItemSelectionRange belowCur(cur, bot);
selection.append(belowCur);
this->selectionModel()->select(selection,
((key == Qt::Key_Home) ? QItemSelectionModel::Deselect : QItemSelectionModel::Select) | QItemSelectionModel::Rows);
// make sure the current index is selected
this->selectionModel()->select(this->currentIndex(),
QItemSelectionModel::Select | QItemSelectionModel::Rows);
break;
}
else if ((event->modifiers() & Qt::NoModifier) == Qt::NoModifier)
{
this->setCurrentIndex((key == Qt::Key_Home) ? top : bot);
break;
}
else
{
[[fallthrough]];
}
default:
QTableView::keyPressEvent(event);
break;
}
}