implement-and-register-a-resize-change-handler-b17d217.md

Implement and Register a Resize Change Handler

Implement and register a resize change type with its change handler to a control.

For the resize action no default change handler exists and a custom change handler has to be created, see Writing a Custom Change Handler.

The change handler gets the following information from the SAPUI5 flexibility tool as change-specific information:

Sample Code:

Change-specific info for the rename action

{  
    changeType: <changeType defined on the DT Metadata>,
    content: {
        resizedElementId: <ID of the element being resized>,
        newWidth: <integer with new width in pixels>
    }
}

You can then register it in the library.js file of the control's library, where you map the change type to the corresponding change handler and the control type. Register the change type for this action in the <control>.flexibility.js file. For more information, see Registering Change Handlers for UI Changes.

The resize action also supports handler functions to create changes - similar to settings - which returns a promise with an array of objects including change-specific data. See more details in the next section.