求助QlistView-CSDN论坛

void QAbstractItemView::setModel(QAbstractItemModel model)

{

    Q_D(QAbstractItemView);

    if (model == d->model)

        return;

    if (d->model && d->model != QAbstractItemModelPrivate::staticEmptyModel()) {

        disconnect(d->model, SIGNAL(destroyed()),

                   this, SLOT(_q_modelDestroyed()));

        disconnect(d->model, SIGNAL(dataChanged(QModelIndex,QModelIndex)),

                   this, SLOT(dataChanged(QModelIndex,QModelIndex)));

        disconnect(d->model, SIGNAL(headerDataChanged(Qt::Orientation,int,int)),

                   this, SLOT(_q_headerDataChanged()));

        disconnect(d->model, SIGNAL(rowsInserted(QModelIndex,int,int)),

                   this, SLOT(rowsInserted(QModelIndex,int,int)));

        disconnect(d->model, SIGNAL(rowsAboutToBeRemoved(QModelIndex,int,int)),

                   this, SLOT(rowsAboutToBeRemoved(QModelIndex,int,int)));

        disconnect(d->model, SIGNAL(rowsRemoved(QModelIndex,int,int)),

                   this, SLOT(_q_rowsRemoved(QModelIndex,int,int)));

        disconnect(d->model, SIGNAL(columnsAboutToBeRemoved(QModelIndex,int,int)),

                   this, SLOT(_q_columnsAboutToBeRemoved(QModelIndex,int,int)));

        disconnect(d->model, SIGNAL(columnsRemoved(QModelIndex,int,int)),

                   this, SLOT(_q_columnsRemoved(QModelIndex,int,int)));

        disconnect(d->model, SIGNAL(columnsInserted(QModelIndex,int,int)),

                   this, SLOT(_q_columnsInserted(QModelIndex,int,int)));

        disconnect(d->model, SIGNAL(modelReset()), this, SLOT(reset()));

        disconnect(d->model, SIGNAL(layoutChanged()), this, SLOT(_q_layoutChanged()));

    }

    d->model = (model  model : QAbstractItemModelPrivate::staticEmptyModel());

    // These asserts do basic sanity checking of the model

    Q_ASSERT_X(d->model->index(0,0) == d->model->index(0,0),

               "QAbstractItemView::setModel",

               "A model should return the exact same index "

               "(including its internal id/pointer) when asked for it twice in a row");

    Q_ASSERT_X(d->model->index(0,0)parent() == QModelIndex(),

               "QAbstractItemView::setModel",

               "The parent of a top level index should be invalid");

    if (d->model != QAbstractItemModelPrivate::staticEmptyModel()) {

        connect(d->model, SIGNAL(destroyed()),

                this, SLOT(_q_modelDestroyed()));

        connect(d->model, SIGNAL(dataChanged(QModelIndex,QModelIndex)),

                this, SLOT(dataChanged(QModelIndex,QModelIndex)));

        connect(d->model, SIGNAL(headerDataChanged(Qt::Orientation,int,int)),

                this, SLOT(_q_headerDataChanged()));

        connect(d->model, SIGNAL(rowsInserted(QModelIndex,int,int)),

                this, SLOT(rowsInserted(QModelIndex,int,int)));

        connect(d->model, SIGNAL(rowsAboutToBeRemoved(QModelIndex,int,int)),

                this, SLOT(rowsAboutToBeRemoved(QModelIndex,int,int)));

        connect(d->model, SIGNAL(rowsRemoved(QModelIndex,int,int)),

                this, SLOT(_q_rowsRemoved(QModelIndex,int,int)));

        connect(d->model, SIGNAL(columnsAboutToBeRemoved(QModelIndex,int,int)),

                this, SLOT(_q_columnsAboutToBeRemoved(QModelIndex,int,int)));

        connect(d->model, SIGNAL(columnsRemoved(QModelIndex,int,int)),

                this, SLOT(_q_columnsRemoved(QModelIndex,int,int)));

        connect(d->model, SIGNAL(columnsInserted(QModelIndex,int,int)),

                this, SLOT(_q_columnsInserted(QModelIndex,int,int)));

        connect(d->model, SIGNAL(modelReset()), this, SLOT(reset()));

        connect(d->model, SIGNAL(layoutChanged()), this, SLOT(_q_layoutChanged()));

    }

<span style="color: #FF0000;">

    QItemSelectionModel selection_model = new QItemSelectionModel(d->model, this);

</span>

//这个TMD 怎么控制啊，大爷的，每次set 都来一个，我还没看到那边进行处理的。

//但可以肯定的是不断的setModel 我感觉100% 内存泄露

    connect(d->model, SIGNAL(destroyed()), selection_model, SLOT(deleteLater()));

    setSelectionModel(selection_model);

    reset(); // kill editors, set new root and do layout

}

//获取DGV中选中单元格中的值

例：

int id=convertToInt32(dgv1selectedRowd[0]cells["id"]values);

//选中的第一行的单元格dataPropertyName属性为Id的单元格中的值，

把获得的值赋给旁边的textboxtext

你可以试试看

ListView你都与给它设置了一个Adapter了，那么直接向Adapter要某个子view就行了。

比如BaseAdapter的：listAdaptergetItemView(int position);

当然你可能要给Adapter实现这个getItemView的方法，不然它默认返回null的。

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