题
我想放一个 QComboBox
进入 QStandardItem
在 QStandardItemModel
. 。我一直在环顾四周,找不到答案,有什么想法吗?
解决方案
你不存储 QComboBox
在一个 QStandardItemModel
. 。假设您有以下选择:
A B C D
而且您有一个列表,其中有两个项目 QListView
, ,第一个值是第二个值为d:
QListView* pView = new QListView();
QStandardItemModel* pModel = new QStandardItemModel();
pView->setModel(pModel);
pModel->appendRow(new QStandardItem("A"));
pModel->appendRow(new QStandardItem("D"));
我们上面创建的是一个列表小部件,它将显示“ A”和“ D”的值。现在,到 QComboBox
. 。我认为您希望它在列表中编辑“ A”和“ D”的值。为此,您需要创建一个 QItemDelegate
.
看 http://doc.qt.io/qt-4.8/qitemdelegate.html
尝试:
class ComboBoxDelegate : public QItemDelegate
{
Q_OBJECT
public:
ComboBoxDelegate(QObject *parent = 0);
QWidget *createEditor(QWidget *parent, const QStyleOptionViewItem &option,
const QModelIndex &index) const;
void setEditorData(QWidget *editor, const QModelIndex &index) const;
void setModelData(QWidget *editor, QAbstractItemModel *model,
const QModelIndex &index) const;
void updateEditorGeometry(QWidget *editor,
const QStyleOptionViewItem &option, const QModelIndex &index) const;
};
ComboBoxDelegate::ComboBoxDelegate(QObject *parent)
: QItemDelegate(parent)
{
}
QWidget *ComboBoxDelegate::createEditor(QWidget *parent,
const QStyleOptionViewItem &/* option */,
const QModelIndex &/* index */) const
{
QComboBox *editor = new QComboBox(parent);
editor->addItem("A");
editor->addItem("B");
editor->addItem("C");
editor->addItem("D");
return editor;
}
void ComboBoxDelegate::setEditorData(QWidget *editor,
const QModelIndex &index) const
{
QString value = index.model()->data(index, Qt::EditRole).toString();
QComboBox *cBox = static_cast<QComboBox*>(editor);
cBox->setCurrentIndex(cBox->findText(value));
}
void ComboBoxDelegate::setModelData(QWidget *editor, QAbstractItemModel *model,
const QModelIndex &index) const
{
QComboBox *cBox = static_cast<QComboBox*>(editor);
QString value = cBox->currentText();
model->setData(index, value, Qt::EditRole);
}
void ComboBoxDelegate::updateEditorGeometry(QWidget *editor,
const QStyleOptionViewItem &option, const QModelIndex &/* index */) const
{
editor->setGeometry(option.rect);
}
然后您需要将代表设置在 QListView
要使它起作用,请参阅:
pView->setItemDelegate(new ComboBoxDelegate(pView));
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