Create a matrix from a .csv file

[mrjj]

@AliM93
yes and see if it will accept it.
Then we need to new a matrixwidget in GridDialog

[AliM93]

so i add the include of matrix.h in the grid.cpp

[mrjj]

@AliM93
and it can compile?

[AliM93]

Build! thansk

[AliM93]

i run it but obviouslt i can't see anything

[AliM93]

because we have to add the matrix in the widget, right?

[mrjj]

@AliM93
yes.
You should still have the layout from before, correct ?
then in Grids constrcutor

GridDialog::GridDialog(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::GridDialog)
{
    ui->setupUi(this);

    MatrixWidget * m = new MatrixWidget (this);
    ui->verticalLayout->addWidget(m); /// you name might differ for layout

}

We dont need the plain widget any more. you can delete it. we use the layout

[AliM93]

done! but i only see the grid, not the content

[mrjj]

@AliM93
\o/
Good work.
I hope you learn a few Creator tricks.

we didnt paint the values yet :)
just all other stuff :=)

But its 4 in the morning so rest must be tomorrow as its bed time for me :)

[AliM93]

@mrjj yes! but i don't even see the number

[AliM93]

anyway, ok for tomorrow, you have been too much patient with me, thanks. and for the first time, i can say thay i better undestand how qt works! i start to appreciate it

[mrjj]

@AliM93
well do you have that version of paint ?

void MatrixWidget::paintEvent(QPaintEvent *event)
{

    QPainter p(this);
    // draw frame.
    p.drawRect(0, 0, width() - 1, height() - 1);

    // size of area we have. w = width , h = height , we take 2 pixles for border
    int w = width() - 2;
    int h = height() - 2;

    // now we find out how big each box should be which area we have  divided with how many on x and y
    bw = w / max_x;
    bh = h / max_y;

    // now we loop and drw the boxes
    for (int xi = 0; xi < max_x; ++xi) {
        for (int yi = 0; yi < max_x; ++yi) {
            p.drawRect( QRect( xi * bw, yi * bh, bw, bh  ) )  ;
            p.drawText(QRect( xi * bw, yi * bh, bw, bh  ),
                       QString::number(xi + 1) + "," + QString::number(yi+1) ); // the +1 aswe dont want to use first at 0,0
        }
    }

}

[AliM93]

yes i have

[mrjj]

@AliM93
But it dont draw numbers ?
That seems very odd.

But you do see grid ?

[AliM93]

sorry! now i have, i lost a part of that version of matrix, sorry!

[mrjj]

@AliM93
Ok that good news as it would be very impossible that numbers went missing :)

what is remaining is the click logic and to actual draw the 1.

how shall we draw 0 ones ?
just no value in cell and cant be selected or what is the goal?

[AliM93]

my idea was to color all the 1s in green and the 0s in gray. so the user know that can select only the green cells, is it possible?

[AliM93]

i don't want to disturb you anymore tonight, if you want and if you have time we can continue tomorrow

[mrjj]

Yes its possible. we can paint it any way we like. teasers included.

Well im getting very tired as 4.20 in the morning is late for me even i do love programming at night.

Tomorrow we add the last part. It's not that much. Promise.
You did good. First custom widget is always a bit tuff.

[AliM93]

thank you so much! you help me a lot also in understand the ideas. thanks. night!