Steinberg::IUpdateHandler Class Reference

#include <iupdatehandler.h>

Inheritance diagram for Steinberg::IUpdateHandler:

Public Member Functions
virtual tresult PLUGIN_API	addDependent (FUnknown *object, IDependent *dependent)=0
virtual tresult PLUGIN_API	removeDependent (FUnknown *object, IDependent *dependent)=0
virtual tresult PLUGIN_API	triggerUpdates (FUnknown *object, int32 message)=0
virtual tresult PLUGIN_API	deferUpdates (FUnknown *object, int32 message)=0
Public Member Functions inherited from Steinberg::FUnknown
virtual tresult PLUGIN_API	queryInterface (const TUID _iid, void **obj)=0
virtual uint32 PLUGIN_API	addRef ()=0
virtual uint32 PLUGIN_API	release ()=0

Static Public Attributes
static const FUID	iid
Static Public Attributes inherited from Steinberg::FUnknown
static const FUID	iid

Detailed Description

Host implements dependency handling for plugins.

• [host imp]
• [get this interface from IHostClasses]
• [released N3.1]
• Install/Remove change notifications
• Trigger updates when an object has changed

Can be used between host-objects and the Plug-In or inside the Plug-In to handle internal updates!

See also

IDependent

Member Function Documentation

addDependent()

virtual tresult PLUGIN_API Steinberg::IUpdateHandler::addDependent ( FUnknown * object, IDependent * dependent )

pure virtual

Install update notification for given object. It is essential to remove all dependencies again using 'removeDependent'! Dependencies are not removed automatically when the 'object' is released!

Parameters

object	: interface to object that sends change notifications
dependent	: interface through which the update is passed

Implemented in Steinberg::UpdateHandler.

deferUpdates()

virtual tresult PLUGIN_API Steinberg::IUpdateHandler::deferUpdates ( FUnknown * object, int32 message )

pure virtual

Same as triggerUpdates, but delivered in idle (usefull to collect updates).

Implemented in Steinberg::UpdateHandler.

removeDependent()

virtual tresult PLUGIN_API Steinberg::IUpdateHandler::removeDependent ( FUnknown * object, IDependent * dependent )

pure virtual

Remove a previously installed dependency.

Implemented in Steinberg::UpdateHandler.

triggerUpdates()

virtual tresult PLUGIN_API Steinberg::IUpdateHandler::triggerUpdates ( FUnknown * object, int32 message )

pure virtual

Inform all dependents, that object has changed.

Parameters

object	is the object that has changed
message	is a value of enum IDependent::ChangeMessage, usually IDependent::kChanged - can be a private message as well (only known to sender and dependent)

Implemented in Steinberg::UpdateHandler.

Member Data Documentation

iid

const FUID Steinberg::IUpdateHandler::iid

static

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The documentation for this class was generated from the following file:

• /home/runner/work/lmms-fork/lmms-fork/plugins/CarlaBase/carla/source/includes/vst3sdk/pluginterfaces/base/iupdatehandler.h