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ohos-uicheckbox-onchangelistener.md 3.91 KB

# OHOS::UICheckBox::OnChangeListener<a name="EN-US_TOPIC_0000001055039540"></a>

## **Overview**<a name="section1209685669093534"></a>

**Related Modules:**

[Graphic](graphic.md)

**Description:**

Represents a listener for changes of a check box.

This is an inner class of  **[UICheckBox](ohos-uicheckbox.md)**. It contains a callback function to be invoked when the check box state changes.

**Since:**

1.0

**Version:**

1.0

## **Summary**<a name="section1154228997093534"></a>

## Public Member Functions<a name="pub-methods"></a>

<a name="table579415977093534"></a>
<table><thead align="left"><tr id="row456203717093534"><th class="cellrowborder" valign="top" width="50%" id="mcps1.1.3.1.1"><a name="p580483457093534"></a><a name="p580483457093534"></a>Public Member Function Name
</th>
<th class="cellrowborder" valign="top" width="50%" id="mcps1.1.3.1.2"><a name="p1357372324093534"></a><a name="p1357372324093534"></a>Description
</th>
</tr>
</thead>
<tbody><tr id="row1303672093093534"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.1 "><a name="p1173880181093534"></a><a name="p1173880181093534"></a><a href="graphic.md#ga373b76d4ce1aea6380f42ce78ecd59c3">OnChange</a> (<a href="graphic.md#ga15a3f0302aded0e4d1584ddc6002335d">UICheckBoxState</a> state)=0
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.2 "><a name="p2039914109093534"></a><a name="p2039914109093534"></a>virtual bool 
<a name="p283061467093534"></a><a name="p283061467093534"></a>Called when the state of this check box is switched. This is a virtual function, which needs your implementation. 
</td>
</tr>
<tr id="row1998776076093534"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.1 "><a name="p1330321932093534"></a><a name="p1330321932093534"></a><a href="graphic.md#gab2e7f64e07e70975baa571660687f6a1">~OnChangeListener</a> ()
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.2 "><a name="p1033474272093534"></a><a name="p1033474272093534"></a>virtual 
<a name="p52464641093534"></a><a name="p52464641093534"></a>A destructor used to delete the <a name="b471754772093534"></a><a name="b471754772093534"></a><a href="ohos-uicheckbox-onchangelistener.md">OnChangeListener</a> instance. 
</td>
</tr>
<tr id="row1249898734093534"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.1 "><a name="p1936030561093534"></a><a name="p1936030561093534"></a><a href="graphic.md#ga4854963aa969ee20a6cd174a70f5cd23">operator new</a> (size_t size)
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.2 "><a name="p1541814359093534"></a><a name="p1541814359093534"></a>void * 
<a name="p1290795529093534"></a><a name="p1290795529093534"></a>Overrides the <a name="b1753114081093534"></a><a name="b1753114081093534"></a>new function. 
</td>
</tr>
<tr id="row1703381025093534"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.1 "><a name="p188937255093534"></a><a name="p188937255093534"></a><a href="graphic.md#gadf1997a0f56ac2b220e7f0f8e8e0a6ef">operator delete</a> (void *p)
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.2 "><a name="p424256689093534"></a><a name="p424256689093534"></a>void 
<a name="p2016162646093534"></a><a name="p2016162646093534"></a>Overrides the <a name="b1841944126093534"></a><a name="b1841944126093534"></a>delete function. 
</td>
</tr>
</tbody>
</table>

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提交于 2020-09-08 10:08 . add OpenHarmony 1.0 baseline

OHOS::UICheckBox::OnChangeListener

Overview

Related Modules:

Graphic

Description:

Represents a listener for changes of a check box.

This is an inner class of UICheckBox. It contains a callback function to be invoked when the check box state changes.

Since:

1.0

Version:

1.0

Summary

Public Member Functions

Public Member Function Name	Description
OnChange (UICheckBoxState state)=0	virtual bool Called when the state of this check box is switched. This is a virtual function, which needs your implementation.
~OnChangeListener ()	virtual A destructor used to delete the OnChangeListener instance.
operator new (size_t size)	void * Overrides the new function.
operator delete (void *p)	void Overrides the delete function.

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OHOS::UICheckBox::OnChangeListener

Overview

Summary

Public Member Functions

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OHOS::UICheckBox::OnChangeListener

Overview

Summary

Public Member Functions

简介

发行版

贡献者

近期动态

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