---
title: handleEvent
framework: kernel
role: pseudoSymbol
path: kernel/ioframebuffer/1813481-handleevent
---

# handleEvent

Notify IOFramebuffer superclass code of events.

## Declaration

```occ
IOReturn handleEvent(
 IOIndex event,
 void *info = 0 ); 
```

## Parameters

- `event`: The event that has occurred: kIOFBNotifyWillPowerOff call before entering a state other than the maximum. kIOFBNotifyDidPowerOn call after entering the maximum power state. kIOFBNotifyWillPowerOff call before entering a state other than the maximum. kIOFBNotifyDidPowerOn call after entering a state other than the maximum.
- `info`: None of the above events require additional info, pass zero.

## Return Value

Return Value an IOReturn code, safely ignored.

## Overview

Overview IOFramebuffer subclasses should call this IOFramebuffer method on certain power state changes.

## See Also

### Miscellaneous

- [connectFlags](kernel/ioframebuffer/1812972-connectflags.md)
- [convertCursorImage](kernel/ioframebuffer/1812983-convertcursorimage.md)
- [doI2CRequest](kernel/ioframebuffer/1812996-doi2crequest.md)
- [enableController](kernel/ioframebuffer/1813011-enablecontroller.md)
- [flushCursor](kernel/ioframebuffer/1813022-flushcursor.md)
- [getApertureRange](kernel/ioframebuffer/1813036-getaperturerange.md)
- [getAppleSense](kernel/ioframebuffer/1813053-getapplesense.md)
- [getAttribute](kernel/ioframebuffer/1813070-getattribute.md)
- [getAttributeForConnection](kernel/ioframebuffer/1813093-getattributeforconnection.md)
- [getConnectionCount](kernel/ioframebuffer/1813110-getconnectioncount.md)
- [getCurrentDisplayMode(IODisplayModeID *, IOIndex *)](kernel/ioframebuffer/1813145-getcurrentdisplaymode.md)
- [getDDCBlock](kernel/ioframebuffer/1813183-getddcblock.md)
- [getDisplayModeCount](kernel/ioframebuffer/1813210-getdisplaymodecount.md)
- [getDisplayModes](kernel/ioframebuffer/1813237-getdisplaymodes.md)
- [getInformationForDisplayMode](kernel/ioframebuffer/1813269-getinformationfordisplaymode.md)
- [getPixelFormats](kernel/ioframebuffer/1813303-getpixelformats.md)
- [getPixelFormatsForDisplayMode](kernel/ioframebuffer/1813329-getpixelformatsfordisplaymode.md)
- [getPixelInformation](kernel/ioframebuffer/1813353-getpixelinformation.md)
- [getStartupDisplayMode](kernel/ioframebuffer/1813382-getstartupdisplaymode.md)
- [getTimingInfoForDisplayMode](kernel/ioframebuffer/1813413-gettiminginfofordisplaymode.md)
- [getVRAMRange](kernel/ioframebuffer/1813443-getvramrange.md)
- [hasDDCConnect](kernel/ioframebuffer/1813510-hasddcconnect.md)
- [readDDCClock](kernel/ioframebuffer/1813550-readddcclock.md)
- [readDDCData](kernel/ioframebuffer/1813593-readddcdata.md)
- [registerForInterruptType](kernel/ioframebuffer/1813622-registerforinterrupttype.md)
- [setApertureEnable](kernel/ioframebuffer/1813646-setapertureenable.md)
- [setAttribute](kernel/ioframebuffer/1813661-setattribute.md)
- [setAttributeForConnection](kernel/ioframebuffer/1813672-setattributeforconnection.md)
- [setCLUTWithEntries](kernel/ioframebuffer/1813680-setclutwithentries.md)
- [setCurrentDisplayMode](kernel/ioframebuffer/1813685-setcurrentdisplaymode.md)
- [setCursorImage](kernel/ioframebuffer/1813692-setcursorimage.md)
- [setCursorState](kernel/ioframebuffer/1813699-setcursorstate.md)
- [setDDCClock](kernel/ioframebuffer/1813707-setddcclock.md)
- [setDDCData](kernel/ioframebuffer/1813718-setddcdata.md)
- [setDetailedTimings](kernel/ioframebuffer/1813724-setdetailedtimings.md)
- [setDisplayMode](kernel/ioframebuffer/1813732-setdisplaymode.md)
- [setGammaTable](kernel/ioframebuffer/1813739-setgammatable.md)
- [setInterruptState](kernel/ioframebuffer/1813744-setinterruptstate.md)
- [setStartupDisplayMode](kernel/ioframebuffer/1813749-setstartupdisplaymode.md)
- [unregisterInterrupt(void *)](kernel/ioframebuffer/1813753-unregisterinterrupt.md)
- [unregisterInterrupt(void *, UInt32)](kernel/ioframebuffer/1813757-unregisterinterrupt.md)
- [validateDetailedTiming](kernel/ioframebuffer/1813761-validatedetailedtiming.md)