Sizing QTableview to its content

Bert59

Hello,

I have a QTableView which content (nb of columns) can change programatricaly. I would like to adjust the size of the tableview to the content.
Below you can see the result I have so far

In Qt Creator it looks like below

How can I adjust the size of the tableview to fit to the content?
Thank you

SGaist

Hi,

You have to resize it yourself by requesting its sizeHint after you modify the number of columns.

Bert59

This post is deleted!

Bert59

Thank you for your feedback.
I tried the following but is not working.

    model.insertRows(0, 4);
    model.insertColumns(0, 4);

    QSize size = ui->table1->sizeHint();
    size.setWidth(350);

Can you give me more details?

jsulm

@Bert59 said in Sizing QTableview to its content:

size.setWidth(350);

What do expect this to do? It just changes width in QSize instance "size" nothing more - it does not resize anything.

Bert59

I try to resize a tableview to its content as described in the first post in this topic

JonB

@Bert59
What method are you calling to apply the newly calculated size to the tableview?

Bert59

I would like that a tableview keeps the size of it's content.
If I add columns the tableview should expand to show all columns as long as it is smaller than the window.
If I resize the window the tableview should keep the same size and should stay centered in the window.
For testing the possibility of setting the width of the tableview to a given value I tried the following code:

ui->table1->setModel(&model); //table1 is the name of the tableview
model.insertRows(0, 4);
model.insertColumns(0, 4);

int size = ui->table1->sizeHint().width();
qInfo() << size; //Result is 256

ui->table1->sizeHint().setWidth(350);
size = ui->table1->sizeHint().width();
qInfo() << size; //Result remains 256

I couldn' find in the documentation how to achive this behaviour.
I hope this clarfies what I'm looking for.

JonB

@Bert59
What I/ @jsulm meant was: you can't just alter the QSize returned by a sizeHint() method and expect that to alter a widget's size hint!

You were supposed to use methods like QWidget::setMinimumSizeHint() or QWidget::resize()....

Whether that will do all that you want I do not know. But that is what @SGaist meant by

You have to resize it yourself by requesting its sizeHint after you modify the number of columns.

Bert59

Hi,
I got the behaviour I was looking for by using the following code.

model.insertColumns(0, 4);
ui->table1->setModel(&model);

int colWidth = ui->table1->columnWidth(1);
int vHeaderWidth = ui->table1->verticalHeader()->width();
int tableWidth = vHeaderWidth + 4*colWidth;
ui->table1->setFixedWidth(tableWidth);

As I'm a beginner with Qt I don't know if it is the recommended way of doing it, but for the time being it works as expected.

Thank you for your comments