如何检测QTableView中是否有选择项

如何检测QTableView中是否有选择项

使用QItemSelectionModel类

QItemSelectionModel类说明:
The QItemSelectionModel class keeps track of a view's selected items.
A QItemSelectionModel keeps track of the selected items in a view, or in several views onto the same model. It also keeps 

track of the currently selected item in a view.
The QItemSelectionModel class is one of the Model/View Classes and is part of Qt's model/view framework.
QItemSelectionModel类保持与视图选择项之间的联系!
一个QItemSelectionModel保持着与一个视图(或者同一个model的多个视图)的选择项之间的联系。
QItemSelectionModel类属于模型-视图类,并且它属于Qt的模型-视图框架的一部分。

 

操作:触发QItemSelectionModel的selectionChanged信号,然后在响应槽中通过该类的hasSelection方法判断是否有选择项目。
 可以通过currentIndex获取当前选择项。

 

eg.
 QItemSelectionModel * md = ui->tableView->selectionModel();
 connect(md,SIGNAL(selectionChanged(QItemSelection,QItemSelection)),this,SLOT(view_select_check

(QItemSelection,QItemSelection)));

 然后在响应槽函数当中:
 if(wordTableSelectionModel->hasSelection())
            ui->selectOk->setEnabled(true);
        else
            ui->selectOk->setDisabled(true);
至于获取当前选择项,可以使用currentIndex获取当前选择项的QModelIndex,然后进行处理,我这里是投递到它的双击事件中。
 QModelIndex dex = wordTableSelectionModel->currentIndex();
        this->on_tableView_doubleClicked(dex);

 

posted @ 2013-01-05 14:25  justwake  阅读(4504)  评论(0编辑  收藏  举报