read state of checkbox within qTable

Leopold

Hello,
I established a table

void MainWindow::setuptable_list(QTableWidget *table_list)
{
 //    m_ui->table_list = new QTableWidget(this);
    
m_ui->table_list->setRowCount(7);
m_ui->table_list->setColumnCount(6);
m_ui->table_list->setShowGrid(true);
m_ui->table_list->setStyleSheet("QTableView {selection-background-color: red;}");
m_ui->table_list->setSelectionMode(QAbstractItemView::SingleSelection);
m_ui->table_list->setCellWidget(0, 0, new QCheckBox("1 rpm"));
m_ui->table_list->setCellWidget(1, 0, new QCheckBox("54  rpm<1500"));
m_ui->table_list->setCellWidget(2, 0, new QCheckBox("2  watertemp"));

Then I connected

connect( m_ui->table_list, SIGNAL(  cellChanged(int,int)) ,this, SLOT( cellSelectedSlot(int,int)));

and can connect, now I want to know if the checkbox is enabled or not here my code

void MainWindow::cellSelectedSlot(int nRow,int nCol)
{

    int m=0;
int Reihe=nRow ;
int Spalte=nCol;
 qDebug()<<Reihe <<Spalte;
  if ((Reihe== 0)&&(Spalte==0))
        {if (m_ui->table_list->cellWidget(Reihe,Spalte)->QWidget(CheckBox)->isChecked(true))
      {

This doesn' t work, how can I get the checkbox state?

JonB

@Leopold said in read state of checkbox within qTable:

->QWidget(CheckBox)->

What does that do? If cellWidget returns the widget, you want something like a dynamic_cast to QCheckBox to access your checkbox, don't you?

Leopold

@JonB
I want sth like this: m_ui->table_list->QCheckBox->isChecked(true)) but this didn't work too so I tried the other way.
I#m out of mind.Can you help?

JonB

@Leopold
I am not a C++ programmer, so I don't know the exact syntax. But you need (I would have thought) to do something like:

QCheckBox *cb = dynamic_cast <QCheckBox *> (m_ui->table_list->cellWidget(Reihe,Spalte));
if (cb)
    isChecked = cb->isChecked();

mrjj

Hi
Use qobject_cast instead :)
Else pretty good hit for non c++ programmer ! ;)

JonB

@mrjj
Nowt wrong with dynamic_cast, just a touch slower (and uses RTTI, but so what), and I don't think speed here is going to matter ... ;-)

mrjj

@JonB
well qobject_cast uses Qt meta type system and seems a better fit but
not sure if any situations where dynamic_cast would do incorrectly vs qobject_cast.
So nope, wont matter much i guess.

JonB

@mrjj
Yeah, I was just being flippant, didn't mean to disagree. qobject_cast might be a better "fit", I had assumed OP was familiar with dynamic_cast for other purposes, is all :)

mrjj

ah, ok. well actually a good assumption. :)

Leopold

@all,
sorry i can notcome up with that code.With this code , the connect should transport three items int row,intcolumn and bool ischecked.
Meanwhile I have found "QChecktableItem" but when I want to include qtable.h, this is not found and QCheckTableItem is also not found. Not either in the help files.Some examples are out of 2003 within QT 3 .I have Qt 5.6, is this QCheckboxItem no longer available.
Who has example which works?

VRonin

There is absolutely no reason to use setCellWidget to set a checkbox as QAbstarctItemModel has that function already implemented:

m_ui->table_list->setRowCount(7);
m_ui->table_list->setColumnCount(6);
m_ui->table_list->setShowGrid(true);
m_ui->table_list->setStyleSheet("QTableView {selection-background-color: red;}");
m_ui->table_list->setSelectionMode(QAbstractItemView::SingleSelection);
QTableWidgetItem* tempItem = new QTableWidgetItem;
tempItem->setFlags(tempItem->flags() | Qt::ItemIsUserCheckable);
tempItem->setData(Qt::DisplayRole, QStringLiteral("1 rpm"));
tempItem->setData(Qt::CheckStateRole, Qt::Unchecked);
m_ui->table_list->setItem(0,0,tempItem);
tempItem = new QTableWidgetItem;
tempItem->setFlags(tempItem->flags() | Qt::ItemIsUserCheckable);
tempItem->setData(Qt::DisplayRole, QStringLiteral("54  rpm<1500"));
tempItem->setData(Qt::CheckStateRole, Qt::Unchecked);
m_ui->table_list->setItem(1,0,tempItem);
tempItem = new QTableWidgetItem;
tempItem->setFlags(tempItem->flags() | Qt::ItemIsUserCheckable);
tempItem->setData(Qt::DisplayRole, QStringLiteral("2  watertemp"));
tempItem->setData(Qt::CheckStateRole, Qt::Unchecked);
m_ui->table_list->setItem(2,0,tempItem);

void MainWindow::cellSelectedSlot(int nRow,int nCol)
{

    int m=0;
int Reihe=nRow ;
int Spalte=nCol;
 qDebug()<<Reihe <<Spalte;
  if ((Reihe== 0)&&(Spalte==0))
        {if (m_ui->table_list->model()->index(Reihe,Spalte).data(Qt::CheckStateRole)==Qt::Checked)

Leopold

Hello,
works perfect .
I couldn't have done it myself.
Thank you.