我在UI文件中定义了QTableView。这是图：
alt text http://www.freeimagehosting.net/uploads/c5fa6c5d22.png
我想用QComboBox小部件进行月份更改（红色数组指向），处理代理，但对我来说，对于我的自定义委托和模型，它也是复杂的问题，我无法弄清楚出了什么问题？！
问题：在我看来，QAbstractTableModel无法与QItemDelegate一起使用，因为我无法将自定义简单ComboBoxDelegate小部件与QTableView结合使用。跆拳道？
这就是我所拥有的：
我的自定义委托标头/来源数据：
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(index.data(Qt::DisplayRole).toString());
return editor;
}
void ComboBoxDelegate::setEditorData(QWidget *editor,
const QModelIndex &index) const
{
QString value = index.model()->data(index, Qt::EditRole).toString();
QComboBox *comboBox = static_cast<QComboBox*>(editor);
comboBox->setCurrentIndex(comboBox->findText(value));
}
void ComboBoxDelegate::setModelData(QWidget *editor,
QAbstractItemModel *model,
const QModelIndex &index) const
{
QComboBox *comboBox = static_cast<QComboBox*>(editor);
QString value = comboBox->currentText();
model->setData(index, value, Qt::EditRole);
}
模型数据：
class PortfolioModel : public QAbstractTableModel
{
Q_OBJECT;
// types
enum Position
{
ePosValue = 0
, eColumnCount
};
enum Constants
{
eLocalCcy = 0
, eCurrentTime
, eCurrentMonthName
, eRowCount
};
// data
static QFont font_;
static QBrush foreground_;
static QBrush background_;
// methods
QVariant _valueName(int index) const;
QVariant _valueNameTooltip(int index) const;
QVariant _data(int index, int col, bool tooltip) const;
public:
PortfolioModel(QObject* parent = 0);
~PortfolioModel();
int rowCount(const QModelIndex& parent = QModelIndex()) const;
int columnCount(const QModelIndex& parent = QModelIndex()) const;
QVariant data(const QModelIndex& index, int role = Qt::DisplayRole) const;
QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const;
signals:
void resizeToContents(void);
public slots:
void refreshData(void);
};
QFont PortfolioModel::font_ = QFont("Tahoma", 8, QFont::Normal);
QBrush PortfolioModel::foreground_ = QBrush(QColor("#000000")); // Black
QBrush PortfolioModel::background_ = QBrush(QColor("#C3FDB8")); // Dark Sea Green1
PortfolioModel::PortfolioModel(QObject* parent)
: QAbstractTableModel(parent)
{}
PortfolioModel::~PortfolioModel()
{}
void PortfolioModel::refreshData(void)
{
emit dataChanged(QModelIndex(), QModelIndex());
emit resizeToContents();
}
int PortfolioModel::rowCount(const QModelIndex& parent/* = QModelIndex()*/) const
{
return eRowCount;
}
int PortfolioModel::columnCount(const QModelIndex& parent/* = QModelIndex()*/) const
{
return eColumnCount;
}
QVariant PortfolioModel::data(const QModelIndex& index, int role/* = Qt::DisplayRole*/) const
{
if (!index.isValid())
return QVariant();
switch (role)
{
case Qt::DisplayRole:
return _data(index.row(), index.column(), false);
case Qt::FontRole:
break;
case Qt::BackgroundRole:
return background_;
case Qt::ForegroundRole:
return foreground_;
case Qt::TextAlignmentRole:
case Qt::DecorationRole:
case Qt::EditRole:
break;
case Qt::ToolTipRole:
return _data(index.row(), index.column(), true);
case Qt::StatusTipRole:
case Qt::WhatsThisRole:
case Qt::SizeHintRole:
break;
}
return QVariant();
}
QVariant PortfolioModel::headerData(int section, Qt::Orientation orientation, int role) const
{
switch (orientation)
{
case Qt::Horizontal:
switch (role)
{
case Qt::DisplayRole:
if (section == ePosValue)
{
return QVariant("Value");
}
case Qt::ToolTipRole:
if (section == ePosValue)
{
return QVariant("Fund values");
}
break;
}
case Qt::Vertical:
switch (role)
{
case Qt::DisplayRole:
return _valueName(section);
case Qt::ToolTipRole:
return _valueNameTooltip(section);
}
break;
}
return QVariant();
}
QVariant PortfolioModel::_valueNameTooltip(int index) const
{
switch (index)
{
case eLocalCcy:
return QObject::tr("Local currency");
case eCurrentTime:
return QObject::tr("Current time");
case eCurrentMonthName:
return QObject::tr("Current Month");
}
return QVariant();
}
QVariant PortfolioModel::_valueName(int index) const
{
switch (index)
{
case eLocalCcy:
return QObject::tr("Local Currency");
case eCurrentTime:
return QObject::tr("Current Time");
case eCurrentMonthName:
return QObject::tr("Month");
}
return QVariant();
}
QVariant PortfolioModel::_data(int index, int col, bool tooltip) const
{
switch (index)
{
case eLocalCcy:
if (col == ePosValue)
{
return QString(Nav::bk()->currentFund().currency(Nav::bk()->currentFund().localCcy()).code());
}
break;
case eCurrentTime:
if (col == ePosValue)
{
return Nav::bk()->currentFund().currentTime();
}
break;
case eCurrentMonthName:
if (col == ePosValue)
{
return QDate::longMonthName(Nav::bk()->currentFund().currentTime().date().month());
}
break;
}
return QVariant();
}
然后我就这样做了init委托：
ComboBoxDelegate *delegate_ = new ComboBoxDelegate(this);
this->ui.tableView->setItemDelegate(delegate_);
谢谢！
答案 0 :(得分：2)
从QAbstractItemModel的概述（参见子类化标题）：
要在模型中启用编辑，您就可以了 还必须实现setData（）和 重新实现flags（）以确保 返回ItemIsEditable。
QAbstractTableModel的概述中给出了相同的信息。您的PortfolioModel课程没有重新实现这些功能。要使用委托的编辑器，您需要使用这样做。
或者，您可能只希望它看起来好像有一个组合框（实际上不允许编辑）。如果是这种情况，您可能需要自己做一些绘图黑客以使其显示方式...或将其标记为可编辑但禁用小部件，或类似的东西。
答案 1 :(得分：1)
在此博客http://qt-articles.blogspot.com/2010/07/how-to-customize-listview-in-qt-using.html中给出了一个代理示例..请使用博客中的代表示例示例检查您的代理人。希望你能得到一些线索。