how can to receive the Real-time keyEvent in the QTableView?

[robertkun]

When I DoubleClicked one cell in the table , the cursor will set in the cell ,
and now the KeyEvent() of the QTableView will not receive any signal of the Keyboard...

I think the reason is the cell is a QStandModelItem ,so it can't receive the signal KeyEvent() of the QTableView...

So how can I to receive the real-time signal of the QTableView ,when I input one word in the cells ,will receive a signal...

Hope you help...

[spirit]

how do you process key events? did you inherit QTableView and overrode keyPressEvent or you installed event filter for QTableView object? if you use last approach then you should try to install event filter on QTableView's viewport.

[robertkun]

how do you process key events? did you inherit QTableView and overrode keyPressEvent or you installed event filter for QTableView object? if you use last approach then you should try to install event filter on QTableView's viewport.

Yes ,I inherit QTableView and overrode the KeyPressEvent ...
For this,How can I to receive the keyEvent in the QTablleView,

Thank you very much.

[spirit]

can you provide compilable example which reproduces the problem?

[robertkun]

#include "mainwindow.h"
#include "cgTableView.h"
 
#include <QTableView>
#include <qDebug>
 
cgTableView::cgTableView(QWidget *parent)
	:QTableView(parent)
{
	mpmain = (mainwindow*)parent;
	mdata = new cgItemModel();
	mselections = new cgItemSelectModel(mdata);
	setModel(mdata);
	setSelectionModel(mselections);
 
	QList<QString> list;
	list.append("Record");
	list.append("In");
	list.append("Stop");
	list.append("Out");
	list.append("property");
 
	mdata->setHorizontalHeaderLabels(list);
	setColumnWidth(0, 300);
 
	//grabKeyboard ();
 
	connect(this,SIGNAL(pressed(const QModelIndex)),this,SLOT(slot_pressed(const QModelIndex)));
	connect(mdata,SIGNAL(dataChanged(const QModelIndex , const QModelIndex )),
		this,SLOT(slot_dataChanged(const QModelIndex , const QModelIndex )));
	connect(mdata,SIGNAL(itemChanged ( QStandardItem * )),this,SLOT(slot_itemChange( QStandardItem * )));
}
 
cgTableView::~cgTableView()
{
 
}
 
void cgTableView::addItem()
{
	QStandardItem* item = new QStandardItem(QString(""));
	mdata->appendRow(item);
}
 
void cgTableView::remItem()
{
	int index = currentIndex().row();
	mdata->removeRow(index);
}
 
void cgTableView::insItem()
{
	int index = currentIndex().row();
	QStandardItem* item = new QStandardItem(QString(""));
	if( index > 0)
	{
		mdata->insertRow( index , item );
	}
	else
	{
		mdata->insertRow( 0 , item );
	}
}
 
int cgTableView::getIndex()
{
	int index = currentIndex().row();
	return index;
}
 
int cgTableView::getRowCount()
{
	int rowCount = mdata->rowCount();
	return rowCount;
}
 
void cgTableView::slot_pressed ( const QModelIndex & index )
{
	int ind = currentIndex().row();
	int rowCount = mdata->rowCount();
	mpmain->tablePressed( ind , rowCount );
}
 
void cgTableView::slot_dataChanged(const QModelIndex & topLeft, const QModelIndex & bottomRight)
{
	qDebug()<<"*** slot_dataChanged ***";
	int ind = currentIndex().row();
	QModelIndex index = mdata->index(currentIndex().row(),currentIndex().column());
	QString strdata = mdata->data( index ).toString ();
 
	mpmain->setItemData(ind ,strdata);
}
 
void cgTableView::slot_itemChange( QStandardItem * item)
{
	qDebug()<<"*** slot_itemChange ***";
	QModelIndex index = mdata->index(currentIndex().row(),currentIndex().column());
	QString strdata = mdata->data( index ).toString ();
}
 
void cgTableView::keyPressEvent ( QKeyEvent * event )
{
	QTableView::keyPressEvent(event);
}
 
void cgTableView::actionEvent ( QActionEvent * event )
{
 
}
 
void cgTableView::childEvent ( QChildEvent * event )
{
 
}
 
//bool cgTableView::event ( QEvent * event )
//{
//	qDebug()<<"cgTableView::event ( QEvent * event )";
//	return true;
//}
 
void cgTableView::inputMethodEvent ( QInputMethodEvent * event )
{
 
}
 
void cgTableView::tabletEvent ( QTabletEvent * event )
{
 
}
 
void cgTableView::paintEvent ( QPaintEvent * event )
{
	qDebug()<<"paintEvent ( QPaintEvent * event )";
	QTableView::paintEvent(event);
}
 
void cgTableView::setChildItem( int row ,int column, QStandardItem * item )
{
	QStandardItemModel *model = dynamic_cast<QStandardItemModel *>(mdata);
}
 
void cgTableView::tableRowsInserted()
{
	QModelIndex index = mdata->index(currentIndex().row(),currentIndex().column());
	rowsInserted(index,0,0);

#include "mainwindow.h"
#include "cgTableView.h"

#include <QTableView>
#include <qDebug>

cgTableView::cgTableView(QWidget *parent)
	:QTableView(parent)
{
	mpmain = (mainwindow*)parent;
	mdata = new cgItemModel();
	mselections = new cgItemSelectModel(mdata);
	setModel(mdata);
	setSelectionModel(mselections);

	QList<QString> list;
	list.append("Record");
	list.append("In");
	list.append("Stop");
	list.append("Out");
	list.append("property");
	
	mdata->setHorizontalHeaderLabels(list);
	setColumnWidth(0, 300);

	//grabKeyboard ();

	connect(this,SIGNAL(pressed(const QModelIndex)),this,SLOT(slot_pressed(const QModelIndex)));
	connect(mdata,SIGNAL(dataChanged(const QModelIndex , const QModelIndex )),
		this,SLOT(slot_dataChanged(const QModelIndex , const QModelIndex )));
	connect(mdata,SIGNAL(itemChanged ( QStandardItem * )),this,SLOT(slot_itemChange( QStandardItem * )));
}

cgTableView::~cgTableView()
{

}

void cgTableView::addItem()
{
	QStandardItem* item = new QStandardItem(QString(""));
	mdata->appendRow(item);
}

void cgTableView::remItem()
{
	int index = currentIndex().row();
	mdata->removeRow(index);
}

void cgTableView::insItem()
{
	int index = currentIndex().row();
	QStandardItem* item = new QStandardItem(QString(""));
	if( index > 0)
	{
		mdata->insertRow( index , item );
	}
	else
	{
		mdata->insertRow( 0 , item );
	}
}

int cgTableView::getIndex()
{
	int index = currentIndex().row();
	return index;
}

int cgTableView::getRowCount()
{
	int rowCount = mdata->rowCount();
	return rowCount;
}

void cgTableView::slot_pressed ( const QModelIndex & index )
{
	int ind = currentIndex().row();
	int rowCount = mdata->rowCount();
	mpmain->tablePressed( ind , rowCount );
}

void cgTableView::slot_dataChanged(const QModelIndex & topLeft, const QModelIndex & bottomRight)
{
	qDebug()<<"*** slot_dataChanged ***";
	int ind = currentIndex().row();
	QModelIndex index = mdata->index(currentIndex().row(),currentIndex().column());
	QString strdata = mdata->data( index ).toString ();
	
	mpmain->setItemData(ind ,strdata);
}

void cgTableView::slot_itemChange( QStandardItem * item)
{
	qDebug()<<"*** slot_itemChange ***";
	QModelIndex index = mdata->index(currentIndex().row(),currentIndex().column());
	QString strdata = mdata->data( index ).toString ();
}

void cgTableView::keyPressEvent ( QKeyEvent * event )
{
	QTableView::keyPressEvent(event);
}

void cgTableView::actionEvent ( QActionEvent * event )
{

}

void cgTableView::childEvent ( QChildEvent * event )
{

}

//bool cgTableView::event ( QEvent * event )
//{
//	qDebug()<<"cgTableView::event ( QEvent * event )";
//	return true;
//}

void cgTableView::inputMethodEvent ( QInputMethodEvent * event )
{

}

void cgTableView::tabletEvent ( QTabletEvent * event )
{

}

void cgTableView::paintEvent ( QPaintEvent * event )
{
	qDebug()<<"paintEvent ( QPaintEvent * event )";
	QTableView::paintEvent(event);
}

void cgTableView::setChildItem( int row ,int column, QStandardItem * item )
{
	QStandardItemModel *model = dynamic_cast<QStandardItemModel *>(mdata);
}

void cgTableView::tableRowsInserted()
{
	QModelIndex index = mdata->index(currentIndex().row(),currentIndex().column());
	rowsInserted(index,0,0);

To copy to clipboard, switch view to plain text mode 

This is the QTableView Program ,and I set many function to receive ,but fail.
In the functions there is a keyPressEvent() ,if the cursor in the cells ,this evnet will not be trigger ...

So I don't know how to receive Real-time signal of the QTabelView ...

[faldzip]

Your approach is not good. In Model/View architecture the main idea is to separate data (model) from it's presentation (view), but you are connecting those things in one class.

But if you really want such approach then there is QTableWidget which is data container and view at once.

And finally: what do you need those key events for? I suppose that for editing items - am I right? Then you should take a look into delegates, as they are used for custom presentation in a view and for custom editors for data presenting in view. And you can get there key events from cells.

[robertkun]

I suppose that for editing items - am I right?

yes, you are right,then I will have a try to use the delegates in the model.
thanks!