main文件与上一个例子完全一致,也使用QStandardItemModel,关键是有这句:QStandardItem.setEditable(false);
继承QAbstractItemDelegate后,覆盖4个函数(全部经过验证,都是自带后覆盖):
class BarDelegate : public QAbstractItemDelegate
{
public:
BarDelegate( QObject *parent = );void paint( QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index ) const;
QSize sizeHint( const QStyleOptionViewItem &option, const QModelIndex &index ) const;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;
};
进度条本身的代码不贴了,直接贴这四个函数:
QWidget *BarDelegate::createEditor( QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index ) const
{
QSlider *slider = new QSlider( parent ); slider->setAutoFillBackground( true );
slider->setOrientation( Qt::Horizontal );
slider->setRange( , );
slider->installEventFilter( const_cast<BarDelegate*>(this) ); return slider;
}void BarDelegate::updateEditorGeometry( QWidget *editor, const QStyleOptionViewItem &option, const QModelIndex &index ) const
{
editor->setGeometry( option.rect );
}void BarDelegate::setEditorData( QWidget *editor, const QModelIndex &index ) const
{
int value = index.model()->data( index, Qt::DisplayRole ).toInt();
static_cast<QSlider*>( editor )->setValue( value );
}void BarDelegate::setModelData( QWidget *editor, QAbstractItemModel *model, const QModelIndex &index ) const
{
model->setData( index, static_cast<QSlider*>( editor )->value() ); // 这句很关键,把model的数据也修改了
}