mirror of
https://github.com/Textualize/textual.git
synced 2025-10-17 02:38:12 +03:00
65 lines
2.0 KiB
Markdown
65 lines
2.0 KiB
Markdown
# Box-sizing
|
|
|
|
The `box-sizing` property determines how the width and height of a widget are calculated.
|
|
|
|
## Syntax
|
|
|
|
```
|
|
box-sizing: border-box | content-box;
|
|
```
|
|
|
|
### Values
|
|
|
|
| Value | Description |
|
|
|------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|
|
| `border-box` (default) | Padding and border are included in the width and height. If you add padding and/or border the widget will not change in size, but you will have less space for content. |
|
|
| `content-box` | Padding and border will increase the size of the widget, leaving the content area unaffected. |
|
|
|
|
## Example
|
|
|
|
Both widgets in this example have the same height (5).
|
|
The top widget has `box-sizing: border-box` which means that padding and border reduce the space for content.
|
|
The bottom widget has `box-sizing: content-box` which increases the size of the widget to compensate for padding and border.
|
|
|
|
=== "Output"
|
|
|
|
```{.textual path="docs/examples/styles/box_sizing.py"}
|
|
```
|
|
|
|
=== "box_sizing.py"
|
|
|
|
```python
|
|
--8<-- "docs/examples/styles/box_sizing.py"
|
|
```
|
|
|
|
=== "box_sizing.css"
|
|
|
|
```sass hl_lines="2 6"
|
|
--8<-- "docs/examples/styles/box_sizing.css"
|
|
```
|
|
|
|
## CSS
|
|
|
|
```sass
|
|
/* Set box sizing to border-box (default) */
|
|
box-sizing: border-box;
|
|
|
|
/* Set box sizing to content-box */
|
|
box-sizing: content-box;
|
|
```
|
|
|
|
## Python
|
|
|
|
```python
|
|
# Set box sizing to border-box (default)
|
|
widget.box_sizing = "border-box"
|
|
|
|
# Set box sizing to content-box
|
|
widget.box_sizing = "content-box"
|
|
```
|
|
|
|
## See also
|
|
|
|
- [`border`](./border.md) to add a border around a widget.
|
|
- [`padding`](./padding.md) to add spacing around the content of a widget.
|