# layout.h<a name="EN-US_TOPIC_0000001055678066"></a>

## **Overview**<a name="section1899854236093526"></a>

**Related Modules:**

[Graphic](graphic.md)

**Description:**

Declares the base class of the layout, which indicates the basic data types and operations that may be used in the layout. 

**Since:**

1.0

**Version:**

1.0

## **Summary**<a name="section1433505562093526"></a>

## Data Structures<a name="nested-classes"></a>

<a name="table1102255871093526"></a>
<table><thead align="left"><tr id="row631820908093526"><th class="cellrowborder" valign="top" width="50%" id="mcps1.1.3.1.1"><p id="p863900127093526"><a name="p863900127093526"></a><a name="p863900127093526"></a>Data Structure Name</p>
</th>
<th class="cellrowborder" valign="top" width="50%" id="mcps1.1.3.1.2"><p id="p1492436495093526"><a name="p1492436495093526"></a><a name="p1492436495093526"></a>Description</p>
</th>
</tr>
</thead>
<tbody><tr id="row1012500352093526"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.1 "><p id="p1730209853093526"><a name="p1730209853093526"></a><a name="p1730209853093526"></a><a href="ohos-layout.md">OHOS::Layout</a></p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.2 "><p id="p2126314137093526"><a name="p2126314137093526"></a><a name="p2126314137093526"></a>Defines the base class of the layout, which indicates the basic data types and operations that may be used in the layout. </p>
</td>
</tr>
</tbody>
</table>