lvgl/docs/widgets/core/line.md

```eval_rst
.. include:: /header.rst 
:github_url: |github_link_base|/widgets/line.md
```
# Line (lv_line)

## Overview
The Line object is capable of drawing straight lines between a set of points.

## Parts and Styles
- `LV_PART_MAIN` It uses all the typical backgrund properties and the line style properties.

## Usage

### Set points 
The points has to be stored in an `lv_point_t` array and passed to the object by the `lv_line_set_points(lines, point_array, point_cnt)` function. 

### Auto-size
By default the Line's width and height is set to `LV_SIZE_CONTENT` to automatically set its size to involve all the points.
If the size if set explicitly the point out of the object
It can be enable with the `lv_line_set_auto_size(line, true)` function. 
If enabled then when the points are set the object's width and height will be changed according to the maximal x and y coordinates among the points. The *auto size* is enabled by default.

### Invert y
By deafult, the *y == 0* point is in the top of the object. It might be conter-intuitive in some cases so the y coordinates can be inverted with `lv_line_set_y_invert(line, true)`. In this case,  *y == 0* will be the bottom of teh obejct. 
The *y invert* is disabled by default.

## Events
Only the [Generic events](../overview/event.html#generic-events) are sent by the object type.

Learn more about [Events](/overview/event).

## Keys
No *Keys* are processed by the object type.

Learn more about [Keys](/overview/indev).

## Example

```eval_rst

.. include:: ../../../examples/widgets/line/index.rst

```

## API 

```eval_rst

.. doxygenfile:: lv_line.h
  :project: lvgl
        
```