Grid-size

The grid-size style sets the number of columns and rows in a grid layout.

The number of rows can be left unspecified and it will be computed automatically.

Note

This style only affects widgets with layout: grid.

Syntax

grid-size: <integer> [<integer>];

The grid-size style takes one or two non-negative <integer>. The first defines how many columns there are in the grid. If present, the second one sets the number of rows – regardless of the number of children of the grid –, otherwise the number of rows is computed automatically.

Examples

Columns and rows

In the first example, we create a grid with 2 columns and 5 rows, although we do not have enough labels to fill in the whole grid:

Outputgrid_size_both.pygrid_size_both.tcss

from textual.app import App
from textual.containers import Grid
from textual.widgets import Label


class MyApp(App):
    CSS_PATH = "grid_size_both.tcss"

    def compose(self):
        yield Grid(
            Label("1"),
            Label("2"),
            Label("3"),
            Label("4"),
            Label("5"),
        )


if __name__ == "__main__":
    app = MyApp()
    app.run()

Grid {
    grid-size: 2 4;  /* (1)! */
}

Label {
    border: round white;
    content-align: center middle;
    width: 100%;
    height: 100%;
}

1. Create a grid with 2 columns and 4 rows.

Columns only

In the second example, we create a grid with 2 columns and however many rows are needed to display all of the grid children:

Outputgrid_size_columns.pygrid_size_columns.tcss

from textual.app import App
from textual.containers import Grid
from textual.widgets import Label


class MyApp(App):
    CSS_PATH = "grid_size_columns.tcss"

    def compose(self):
        yield Grid(
            Label("1"),
            Label("2"),
            Label("3"),
            Label("4"),
            Label("5"),
        )


if __name__ == "__main__":
    app = MyApp()
    app.run()

Grid {
    grid-size: 2;  /* (1)! */
}

Label {
    border: round white;
    content-align: center middle;
    width: 100%;
    height: 100%;
}

1. Create a grid with 2 columns and however many rows.

CSS

/* Grid with 3 rows and 5 columns */
grid-size: 3 5;

/* Grid with 4 columns and as many rows as needed */
grid-size: 4;

Python

To programmatically change the grid size, the number of rows and columns must be specified separately:

widget.styles.grid_size_rows = 3
widget.styles.grid_size_columns = 6