Create a matrix from a .csv file

AliM93

done, so now i have to include into file grid the matrix

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.

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