juce::ComponentMovementWatcher Class Reference

An object that watches for any movement of a component or any of its parent components. More...

#include <juce_ComponentMovementWatcher.h>

Inheritance diagram for juce::ComponentMovementWatcher:

Collaboration diagram for juce::ComponentMovementWatcher:

Public Member Functions
	ComponentMovementWatcher (Component *componentToWatch)
	Creates a ComponentMovementWatcher to watch a given target component. More...
	~ComponentMovementWatcher () override
	Destructor. More...
void	componentBeingDeleted (Component &) override
virtual void	componentBroughtToFront (Component &component)
	Called when the component is brought to the top of the z-order. More...
virtual void	componentChildrenChanged (Component &component)
	Called when the component has children added or removed, or their z-order changes. More...
virtual void	componentEnablementChanged (Component &component)
virtual void	componentMovedOrResized (bool wasMoved, bool wasResized)=0
	This callback happens when the component that is being watched is moved relative to its top-level peer window, or when it is resized. More...
void	componentMovedOrResized (Component &, bool wasMoved, bool wasResized) override
virtual void	componentNameChanged (Component &component)
	Called when the component's name is changed. More...
void	componentParentHierarchyChanged (Component &) override
virtual void	componentPeerChanged ()=0
	This callback happens when the component's top-level peer is changed. More...
virtual void	componentVisibilityChanged ()=0
	This callback happens when the component's visibility state changes, possibly due to one of its parents being made visible or invisible. More...
void	componentVisibilityChanged (Component &) override
Component *	getComponent () const noexcept
	Returns the component that's being watched. More...

Private Member Functions
void	registerWithParentComps ()
void	unregister ()

Private Attributes
WeakReference< Component >	component
Rectangle< int >	lastBounds
uint32	lastPeerID = 0
bool	reentrant = false
Array< Component * >	registeredParentComps
bool	wasShowing

Detailed Description

An object that watches for any movement of a component or any of its parent components.

This makes it easy to check when a component is moved relative to its top-level peer window. The normal Component::moved() method is only called when a component moves relative to its immediate parent, and sometimes you want to know if any of components higher up the tree have moved (which of course will affect the overall position of all their sub-components).

It also includes a callback that lets you know when the top-level peer is changed.

This class is used by specialised components like WebBrowserComponent because they need to keep their custom windows in the right place and respond to changes in the peer.

{GUI}

Constructor & Destructor Documentation

ComponentMovementWatcher()

juce::ComponentMovementWatcher::ComponentMovementWatcher

(

Component *

componentToWatch

)

Creates a ComponentMovementWatcher to watch a given target component.

~ComponentMovementWatcher()

juce::ComponentMovementWatcher::~ComponentMovementWatcher ( )

override

Destructor.

Member Function Documentation

componentBeingDeleted()

void juce::ComponentMovementWatcher::componentBeingDeleted ( Component &  )

overridevirtual

Reimplemented from juce::ComponentListener.

componentBroughtToFront()

virtual void juce::ComponentListener::componentBroughtToFront ( Component &  component )

virtualinherited

Called when the component is brought to the top of the z-order.

Parameters

component

the component that was moved

See also

Component::toFront, Component::broughtToFront

Reimplemented in juce::DropShadower.

componentChildrenChanged()

virtual void juce::ComponentListener::componentChildrenChanged ( Component &  component )

virtualinherited

Called when the component has children added or removed, or their z-order changes.

Parameters

component

the component whose children have changed

See also

Component::childrenChanged, Component::addChildComponent, Component::removeChildComponent

Reimplemented in juce::DropShadower, and juce::RelativeCoordinatePositionerBase.

componentEnablementChanged()

virtual void juce::ComponentListener::componentEnablementChanged ( Component &  component )

virtualinherited

componentMovedOrResized() [1/2]

virtual void juce::ComponentMovementWatcher::componentMovedOrResized ( bool  wasMoved, bool  wasResized  )

pure virtual

This callback happens when the component that is being watched is moved relative to its top-level peer window, or when it is resized.

Implemented in juce::CarbonViewWrapperComponent.

Referenced by juce::CarbonViewWrapperComponent::componentMovedOrResized().

componentMovedOrResized() [2/2]

void juce::ComponentMovementWatcher::componentMovedOrResized ( Component &  , bool  wasMoved, bool  wasResized  )

overridevirtual

Reimplemented from juce::ComponentListener.

Reimplemented in juce::CarbonViewWrapperComponent.

componentNameChanged()

virtual void juce::ComponentListener::componentNameChanged ( Component &  component )

virtualinherited

Called when the component's name is changed.

Parameters

component

the component that had its name changed

See also

Component::setName, Component::getName

Reimplemented in juce::MultiDocumentPanel.

componentParentHierarchyChanged()

void juce::ComponentMovementWatcher::componentParentHierarchyChanged ( Component &  )

overridevirtual

Reimplemented from juce::ComponentListener.

componentPeerChanged()

virtual void juce::ComponentMovementWatcher::componentPeerChanged ( )

pure virtual

This callback happens when the component's top-level peer is changed.

Implemented in juce::CarbonViewWrapperComponent.

componentVisibilityChanged() [1/2]

virtual void juce::ComponentMovementWatcher::componentVisibilityChanged ( )

pure virtual

This callback happens when the component's visibility state changes, possibly due to one of its parents being made visible or invisible.

Implemented in juce::CarbonViewWrapperComponent.

componentVisibilityChanged() [2/2]

void juce::ComponentMovementWatcher::componentVisibilityChanged ( Component &  )

overridevirtual

Reimplemented from juce::ComponentListener.

getComponent()

Component* juce::ComponentMovementWatcher::getComponent ( ) const

inlinenoexcept

Returns the component that's being watched.

registerWithParentComps()

void juce::ComponentMovementWatcher::registerWithParentComps ( )

private

unregister()

void juce::ComponentMovementWatcher::unregister ( )

private

Member Data Documentation

component

WeakReference<Component> juce::ComponentMovementWatcher::component

private

lastBounds

Rectangle<int> juce::ComponentMovementWatcher::lastBounds

private

lastPeerID

uint32 juce::ComponentMovementWatcher::lastPeerID = 0

private

reentrant

bool juce::ComponentMovementWatcher::reentrant = false

private

registeredParentComps

Array<Component*> juce::ComponentMovementWatcher::registeredParentComps

private

wasShowing

bool juce::ComponentMovementWatcher::wasShowing

private

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

• juce_ComponentMovementWatcher.h