textual/docs/styles/dock.md

Dock

The dock property is used to fix a widget to the edge of a container (which may be the entire terminal window).

Syntax

dock: bottom | left | right | top;

The option chosen determines the edge to which the widget is docked.

Examples

The example below shows a left docked sidebar. Notice that even though the content is scrolled, the sidebar remains fixed.

=== "Output"

```{.textual path="docs/examples/guide/layout/dock_layout1_sidebar.py" press="pagedown,down,down,_,_,_,_,_"}
```

=== "dock_layout1_sidebar.py"

```python
--8<-- "docs/examples/guide/layout/dock_layout1_sidebar.py"
```

=== "dock_layout1_sidebar.css"

```sass hl_lines="2"
--8<-- "docs/examples/guide/layout/dock_layout1_sidebar.css"
```

The second example shows how one can use full-width or full-height containers to dock labels to the edges of a larger container. The labels will remain in that position (docked) even if the container they are in scrolls horizontally and/or vertically.

=== "Output"

```{.textual path="docs/examples/styles/dock_all.py"}
```

=== "dock_all.py"

```py
--8<-- "docs/examples/styles/dock_all.py"
```

=== "dock_all.css"

```css hl_lines="2-5 8-11 14-17 20-23"
--8<-- "docs/examples/styles/dock_all.css"
```

CSS

dock: bottom;  /* Docks on the bottom edge of the parent container. */
dock: left;    /* Docks on the   left edge of the parent container. */
dock: right;   /* Docks on the  right edge of the parent container. */
dock: top;     /* Docks on the    top edge of the parent container. */

Python

widget.styles.dock = bottom;  # Dock bottom.
widget.styles.dock = left;    # Dock   left.
widget.styles.dock = right;   # Dock  right.
widget.styles.dock = top;     # Dock    top.