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53 lines
1.5 KiB
Markdown
53 lines
1.5 KiB
Markdown
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```eval_rst
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.. include:: /header.rst
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:github_url: |github_link_base|/widgets/line.md
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```
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# Line (lv_line)
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## Overview
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The Line object is capable of drawing straight lines between a set of points.
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## Parts and Styles
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The Line has only a main part, called `LV_LABEL_PART_MAIN`. It uses all the *line* style properties.
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## Usage
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### Set points
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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.
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### Auto-size
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It is possible to automatically set the size of the line object according to its points.
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It can be enable with the `lv_line_set_auto_size(line, true)` function.
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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.
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### Invert y
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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.
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The *y invert* is disabled by default.
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## Events
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Only the [Generic events](../overview/event.html#generic-events) are sent by the object type.
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Learn more about [Events](/overview/event).
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## Keys
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No *Keys* are processed by the object type.
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Learn more about [Keys](/overview/indev).
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## Example
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```eval_rst
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.. include:: /lv_examples/src/lv_ex_widgets/lv_ex_line/index.rst
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```
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## API
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```eval_rst
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.. doxygenfile:: lv_line.h
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:project: lvgl
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```
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