Columns auto-resize to size of QTableView

Question

I am new to Qt and I have just managed to make a QTableView work with my model. It has fixed 3 columns. When I open a window, it look ok but when i resize the window, the QTableView itself gets resized but columns' width remains the same. Is there any build-in way to make it work? I want columns to resize to fit the edges of QTableView every the the window gets resized.

Do you always want the column widths to be the same? If not, you can stretch the last column's width by calling table->horizontalHeader()->setStretchLastSection(true); — Min Lin, Aug 18 '13 at 00:04

frogatto · Answer 1 · 2022-12-27T11:04:13.060

97

This code equally stretches each column so that they fit the table's width.

table->horizontalHeader()->setSectionResizeMode(QHeaderView::Stretch);

Docs:

QHeaderView::setSectionResizeMode
See resize modes here.

edited Dec 27 '22 at 11:04

answered Dec 09 '15 at 22:19

frogatto

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Davy Jones · Accepted Answer · 2013-08-18T09:30:39.907

51

There is a header flag to ensure that the QTableView's last column fills up its parent if resized. You can set it like so:

table_view->horizontalHeader()->setStretchLastSection(true);

However, that does not resize the other columns proportionately. If you want to do that as well, you could handle it inside the resizeEvent of your parent thusly:

void QParent::resizeEvent(QResizeEvent *event) {
    table_view->setColumnWidth(0, this->width()/3);
    table_view->setColumnWidth(1, this->width()/3);
    table_view->setColumnWidth(2, this->width()/3);

    QMainWindow::resizeEvent(event);
}

QParent class is subclass of QMainWindow.

edited Aug 18 '13 at 09:30

answered Aug 18 '13 at 05:47

Davy Jones

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I haven't tested the second part but first one worked, though I decided to make the window unresizable (made more sense to me) – khajvah Aug 18 '13 at 07:24
To set proportional column widths, I found it easiest to override the resizeEvent as shown, but by subclassing the QTableView in question, rather than the QMainWindow. – jtbr Oct 05 '17 at 02:08

score 7 · Answer 3 · edited May 23 '17 at 11:54

Widgets QTableView, QTreeView and their derived classes (such as QTableWidget) have this two usefull methods:

QHeaderView* horizontalHeader() const;
QHeaderView* verticalHeader() const;

If you open documentation for a class QHeaderView, you will find methods that set up appearance and behavior of row or column header for item views. You can resolve your problem by one of these methods:

void QHeaderView::stretchLastSection( bool stretch )
As Davy Jones mentioned.

Example:

QTableView *table = new QTableView();  
table->horizontalHeader()->setStretchLastSection(true);

void QHeaderView::setResizeMode( ResizeMode mode )
As mode you can set QHeaderView::Stretch or QHeaderView::ResizeToContents.
Unfortunately this method have a drawback - after it's apply you will not be able to change size of columns (or rows) manually (in GUI) or programmatically.

Example:
```
QTableView *table = new QTableView();  
table->horizontalHeader()->setResizeMode(QHeaderView::Stretch);
```

score 5 · Answer 4 · answered Aug 14 '20 at 11:39

5

In PyQt5 you can achieve this in your table_widget by doing:

header = table_widget.horizontalHeader()
header.setSectionResizeMode(QtWidgets.QHeaderView.ResizeToContents)

answered Aug 14 '20 at 11:39

Matheus Torquato

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If you are using PyQt6, it becomes: `header.setSectionResizeMode(QtWidgets.QHeaderView.ResizeMode.ResizeToContents)` – wooshuwu Jul 14 '23 at 03:08

Columns auto-resize to size of QTableView

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