Objects organised in a matrix

[Christian Ehrlicher]

@MortyMars said in Objects organised in a matrix:

What is the code that allows me to modify the content of the Widget below, for example by changing its content from FALSE to TRUE?

ui->textEdit_15->setText("TRUE");

[MortyMars]

@Christian-Ehrlicher

Thanks for your help

But I was hoping - and this is the whole point of the initial question - to access the textEdit by a reference to its position in the grid rather than by its name, which would allow me to process iteratively rather than object by object.

If that's not possible, I admit I don't see the point of grouping Widgets in these grids... :-(

[JonB]

@MortyMars
QLayoutItem *QGridLayout::itemAtPosition(int row, int column) const
followed by
QWidget *QLayoutItem::widget() const
on the returned QLayoutItem, will give you the QTextEdit or whatever is there. Use qobject_cast<QTextEdit *>(widget) on the widget to check if it is/access it as a QTextEdit*.

[Christian Ehrlicher]

@MortyMars ... or use the apporach @Pl45m4 already wrote above and store them in your own container.

[Pl45m4]

@MortyMars said in Objects organised in a matrix:

to access the textEdit by a reference to its position in the grid rather than by its name, which would allow me to process iteratively rather than object by object.

Put your QTextEdits in a container like:

@Pl45m4 said in Objects organised in a matrix:

QVector< QVector< QTextEdit * > > m_textEditMatrix;

Either you take them from your Designer file and add them in your code.
Or you code your QTextEdits directly and add them to your layout also by code.

QVector< QVector< QTextEdit * > > m_textEditMatrix;
QTextEdit * edit_0_0 = new QTextEdit(this);
QTextEdit * edit_0_1 = new QTextEdit(this);
QTextEdit * edit_0_2 = new QTextEdit(this);
QTextEdit * edit_1_0 = new QTextEdit(this);
QTextEdit * edit_1_1 = new QTextEdit(this);
QTextEdit * edit_1_2 = new QTextEdit(this);

// Add a loop that fills your matrix
QVector<QTextEdit*> tmpRow;
tmpRow.push_back(edit_0_0);
tmpRow.push_back(edit_0_1);
tmpRow.push_back(edit_0_2);
m_textEditMatrix.push_back(tmpRow);

// test with:
int row, col;
row = 0;
col = 1;
m_textEditMatrix.at(row).at(col)->setText("True");

[JonB]

@MortyMars
...Or :) ... If you all want to do is iterate the QTextEdits, not know/care which one is which (e.g. you're setting some attribute on them all)

QList<QTextEdit *> allTextEdits = parentWidget.findChildren<QTextEdit *>();
```

[MortyMars]

@Pl45m4 said in Objects organised in a matrix:

@Pl45m4 @Christian-Ehrlicher @JonB :
Thank you all for trying to help me, especially as I'm clearly not at the right level to understand everything instantly, but I'll keep at it, I promise.

Either you take them from your Designer file and add them in your code.

How can I get the QTextEdit from my form?

[JonB]

@MortyMars

How can I get the QTextEdit from my form?

When you use Designer all the widgets you create and name go into ui->, e.g. ui->textEdit1.

[Pl45m4]

@MortyMars said in Objects organised in a matrix:

How can I get the QTextEdit from my form?

In your mainWindow with

ui->objectname
(the name you see in QtDesigner, like textEdit_10).
I recommend to rename them, so you know what widget is where.

[MortyMars]

@Pl45m4
Here's the code I've come up with.
The compilation runs smoothly, but I can't see any changes to the content of the QTextEdit in my form...

`QVector< QVector< QTextEdit* >> m_textEditMatrix;
    ui->edit_0_0 = new QTextEdit(this);
    ui->edit_0_1 = new QTextEdit(this);
    ui->edit_0_2 = new QTextEdit(this);
    ui->edit_0_3 = new QTextEdit(this);
    ui->edit_0_4 = new QTextEdit(this);
    ui->edit_0_5 = new QTextEdit(this);

    // Add a loop that fills your matrix
    QVector<QTextEdit*> tmpRow;
    tmpRow.push_back(ui->edit_0_0);
    tmpRow.push_back(ui->edit_0_1);
    tmpRow.push_back(ui->edit_0_2);
    tmpRow.push_back(ui->edit_0_3);
    tmpRow.push_back(ui->edit_0_4);
    tmpRow.push_back(ui->edit_0_5);


    m_textEditMatrix.push_back(tmpRow);

    // test with:
    //int row, col;
    //row = 0;
    //col = 0;
    m_textEditMatrix.at(0).at(0)->setText("True");
    m_textEditMatrix.at(0).at(1)->setText("True");
    m_textEditMatrix.at(0).at(2)->setText("True");
    m_textEditMatrix.at(0).at(3)->setText("True");
    m_textEditMatrix.at(0).at(4)->setText("True");
    m_textEditMatrix.at(0).at(5)->setText("True");>
``

[Christian Ehrlicher]

@MortyMars said in Objects organised in a matrix:

ui->edit_0_0 = new QTextEdit(this);
ui->edit_0_1 = new QTextEdit(this);
ui->edit_0_2 = new QTextEdit(this);
ui->edit_0_3 = new QTextEdit(this);
ui->edit_0_4 = new QTextEdit(this);
ui->edit_0_5 = new QTextEdit(this);

Why? They are already created within ui.setupUi().

[MortyMars]

@Christian-Ehrlicher,

I confess, I've stupidly copied and adapted the code provided for objects that don't yet exist.
By commenting out the unnecessary lines, IT WORKS !

Thank you all very much for your support and patience, I'll be able to move forward, and if I need to I'll know where to find you :-)