Designer UI widget in qtablewidget / setCellWidget

[jpn]

your awesome, this made the toolbar show up in the cell just like I wanted it to.

Great

Do I access the signals in the contactListTool by contactListTool.signal()?

Sorry, what do you mean? You connect cell widget signals like any other signals:

toolsContacts* contactListTool = new toolsContacts(this);
ui.tableWidget->setCellWidget(1, 1, contactListTool); 
connect(contactListTool, SIGNAL(someSignal()), ....);

toolsContacts* contactListTool = new toolsContacts(this);
ui.tableWidget->setCellWidget(1, 1, contactListTool); 
connect(contactListTool, SIGNAL(someSignal()), ....);

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Also, is there a way to have the object names be variable? since I would not be able to know how many of these ui's would be shown, due to an unknown table size until runtime.

You can later access any particular cell widget via QTableWidget::cellWidget(). Is this what you mean?

[tpf80]

You can later access any particular cell widget via QTableWidget::cellWidget(). Is this what you mean?

Kindof, But when I create them, they have to have a different name correct? so say I have a loop that creates table rows, and in each row adds the widget. How could I give them a variable name? Perhaps this is more of a general c++ question than a Qt specific one.

For instance in php I could have ${$something}, and if $something was "cat" then id have a variable $cat, but if $something was "dog" then id have a variable $dog. In this way, I could have a variable with a variable name. A use would be like ${"variable_" . $index} and a for loop would create variables each named by the index (but not an array).

Assuming that the widgets can't have the same name, and I wouldn't know how many of them I would have until the table is filled with data, it would make sense to use this kind of logic when I create them.

[jpn]

You don't need variables with variable names:

// how to create and set a cell widget in each cell:
for (int row = 0; row < ui.tableWidget->rowCount(); ++row)
{
   for (int col = 0; col < ui.tableWidget->columnCount(); ++col)
   {
      toolsContacts* contactListTool = new toolsContacts(ui.tableWidget);
      ui.tableWidget->setCellWidget(row, col, contactListTool); 
   }
}
 
// how to access a cell widget in particular cell:
toolsContacts* contactListTool = dynamic_cast<toolsContacts*>(ui.tableWidget->cellWidget(2, 3)); // row, col
if (contactListTool)
{
   // the cell contains a cell widget and it's of type toolsContacts
   contactListTool->doSomething();
}

// how to create and set a cell widget in each cell:
for (int row = 0; row < ui.tableWidget->rowCount(); ++row)
{
   for (int col = 0; col < ui.tableWidget->columnCount(); ++col)
   {
      toolsContacts* contactListTool = new toolsContacts(ui.tableWidget);
      ui.tableWidget->setCellWidget(row, col, contactListTool); 
   }
}

// how to access a cell widget in particular cell:
toolsContacts* contactListTool = dynamic_cast<toolsContacts*>(ui.tableWidget->cellWidget(2, 3)); // row, col
if (contactListTool)
{
   // the cell contains a cell widget and it's of type toolsContacts
   contactListTool->doSomething();
}

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[tpf80]

Thanks a lot for all your help, I now understand a lot better how this all fits together!

[tpf80]

one thing I forgot to ask about, but I want to make sure I use good programming techniques.

The table can be refreshed to have new rows in it, and since there will not be too many and I want the latest info to be there, every time I grab new data, I first use:

tableWidget->setRowCount(0)

tableWidget->setRowCount(0)

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to clear the table (which is working nicely for this task), then I add new rows with the new data. Since the table could be refreshed often, my main concern is memory leaks in this case.

When I clear the table, do the toolsContacts widgets contained within the cells automatically get deleted too? Or are they still in memory, requiring me to make a function to clean them up as part of the process of clearing the table? Also, if there are any slots connected to them, do I need to "disconnect" them before clearing the table, or are their connections removed when the widgets are deleted?

Thanks a lot for all your help!

[jpn]

Yes, setting row count to 0 makes items and cell widgets to get properly deleted. Does the row count vary between updates? If not, QTableWidget::clear() would be more natural choice.

And yes, QObject disconnects associated signal slot connections upon destruction. See QObject::~QObject() docs for more details.