Searching for appropriate element

Sillimon

Hi hi !
I'd like to display 2 lines of 3 QString each and make some of those QString alterable (only by clicking a character of that QString and modify it) and some others not.

For now, i'm building a big QString and simply displaying it in a TextArea which makes the code behind awfull.
Does someone have an idea that could fit my needs ? Using QString or not ?

I'd love something like that :
read-only ------------ alterable by clicking a character and then modify it with a keyboard input
00000000 ------------ BF BD 6C 75 6A 68 00 67 ------------ a b c d e f g h
00000008 ------------ 62 63 64 72 6C EF 00 00 ------------ i j k l m n o p

Those ain't the real values but no minds.

There's probably a really basic and clean solution to this but i can't find it... Qt got a pretty big doc.

aha_1980

@Sillimon

I'd say you are searching for a QTableWidget.

Sillimon

@aha_1980 said in Searching for appropriate element:

@Sillimon

I'd say you are searching for a QTableWidget.

It means that i should have one column for each "editable cell" ?
That would be between 13 and 25 columns.
But it has a bunch of really useful properties though...

I think i'm searching too far when it's just that simple.
I'm trying it, thank you again !

aha_1980

@Sillimon said in Searching for appropriate element:

It means that i should have one column for each "editable cell" ?
That would be between 13 and 25 columns.

That depends on your needs. Maybe you just need three columns, each containing the string?

Sillimon

@aha_1980
Yeah...
Actually, i can't do it as i thought, using a lot of columns. The design won't fit.

Using TableView with 3 Columns of String would be the best option but I'm now wondering how i can check user entries...
I'm trying an event on DataChanged inside the model.

aha_1980

Hi @Sillimon

(If your model get's a bit more complex, you should have a look at QTableView and your own model implementation instead using QTableWidget)

Regarding the user entries: that's usually done with a QInputValidator, which forbids entering invalid values (before the data is changed at all).

Sillimon

@aha_1980 said in Searching for appropriate element:

Hi @Sillimon

Hi hi !

(If your model get's a bit more complex, you should have a look at QTableView and your own model implementation instead using QTableWidget)

Yeah, i'm already using QTableView since i didn't learn to work on C++ side yet.
I changed my methods and i'm building vectors of QString (each "line" being an vector's index value).
I'm even taking in count latin-1 char (thanks again to you and the others for explanations) this way :

m_alpha.clear();
    QString alpha;
    if(m_chip->getCardType() == "Mifare4K")
    {
        for (size_t i = 0; i < 8; ++i)
        {
            const QChar c = QLatin1Char(readData.at(i));
            if(c.isPrint())
            {
                alpha.push_back(c);
                alpha.append(" ");
            }
            else
            {
                alpha.append(". ");
            }
        }
        m_alpha.push_back(alpha);
        alpha = "";

        for(size_t i = 8; i < 16; i++)
        {
            const QChar c = QChar::fromLatin1(readData.at(i));
            if(c.isPrint())
            {
                alpha.push_back(c);
                alpha.append(" ");
            }
            else
            {
                alpha.append(". ");
            }
        }
        m_alpha.push_back(alpha);
    }
    else if(m_chip->getCardType() == "ISO15693")
    {
        for (size_t i = 0; i < 4; ++i)
        {
            const QChar c = QLatin1Char(readData.at(i));
            if(c.isPrint())
            {
                alpha.push_back(c);
                alpha.append(" ");
            }
            else
            {
                alpha.append(". ");
            }
        }
        m_alpha.push_back(alpha);
    }
    else
    {
        m_alpha.push_back("Invalid chip");
    }

On QML side, i build it this way :

QML mouseArea.onClicked :
tvmodel.append({hexdump: readWrite.getHexdumpLine(1), hexa: readWrite.getHexaLine(1), alpha: readWrite.getAlphaLine(1)})
if(Card.getCardType() === "Mifare4K")
{
        tvmodel.append({hexdump: readWrite.getHexdumpLine(2), hexa: readWrite.getHexaLine(2), alpha: readWrite.getAlphaLine(2)})
}

.cpp :
QString ReadWrite::getAlphaLine(int line)
{
    QString alpha;
    alpha = m_alpha.at(line-1);
    return alpha;
}

I now have something good in display !
Currently working on writing side.

Regarding the user entries: that's usually done with a QInputValidator, which forbids entering invalid values (before the data is changed at all).

That's exactly what i'm looking for ! Keeping that in mind for once i did the writing correct implementation.