CODEWITHSUNDEEP
c++qtqtableview
khajvah
khajvah

Reputation: 5090

Columns auto-resize to the size of QTableView

I have just managed to make a QTableView work with my model. It has fixed 3 columns. When I open a window, it looks ok, but when I resize the window, the QTableView itself gets resized, but columns' width remains the same.

I want columns to resize to fit the edges of QTableView every time the window gets resized.

Is there any built-in way to make it work?

Upvotes: 58

Views: 104188

Answers (4)

frogatto
frogatto

Reputation: 29285

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

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

Docs:

Upvotes: 107

Matheus Torquato
Matheus Torquato

Reputation: 1629

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

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

Upvotes: 6

iamantony
iamantony

Reputation: 1395

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:

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

    Example: 

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

  2. 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);

Upvotes: 10

Davy Jones
Davy Jones

Reputation: 651

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.

Upvotes: 54

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