org.havi.ui

Interface HAdjustmentValue

All Superinterfaces:

HAdjustmentInputPreferred, HNavigable, HNavigationInputPreferred, HOrientable

All Known Implementing Classes:

HRangeValue

public interface HAdjustmentValue
extends HNavigable, HAdjustmentInputPreferred

This interface is implemented by all HAVi UI components which have some form of adjustable numerical value (e.g. a range control).

Event Behavior

Subclasses of HComponent which implement HAdjustmentValue must respond to HFocusEvent and HAdjustmentEvent events.

Applications should assume that classes which implement HAdjustmentValue can generate events of the types HFocusEvent and HAdjustmentEvent in response to other types of input event.

An application may add one or more HAdjustmentListener listeners to the component. The HAdjustmentListener.valueChanged(org.havi.ui.event.HAdjustmentEvent) method of the HAdjustmentListener is invoked whenever the value of the HAdjustmentValue is modified.

HAVi adjustment events are discussed in detail in the HAdjustmentInputPreferred interface description.

Interaction States

The following interaction states are valid for this HAdjustmentValue component:

• NORMAL_STATE
• FOCUSED_STATE
• DISABLED_STATE
• DISABLED_FOCUSED_STATE

The state machine diagram below shows the valid state transitions for an HAdjustmentValue component.

Platform Classes

The following HAVi platform classes implement or inherit the HAdjustmentValue interface. These classes shall all generate both HFocusEvent and HAdjustmentEvent events in addition to any other events specified in the respective class descriptions.

• HRangeValue

See Also:

HNavigable, HOrientable, HAdjustmentInputPreferred, HAdjustmentEvent, HAdjustmentListener

Field Summary

Fields inherited from interface org.havi.ui.HOrientable

ORIENT_BOTTOM_TO_TOP, ORIENT_LEFT_TO_RIGHT, ORIENT_RIGHT_TO_LEFT, ORIENT_TOP_TO_BOTTOM

Method Summary

Methods

Modifier and Type	Method and Description
void	addAdjustmentListener(HAdjustmentListener l) Adds the specified HAdjustmentListener to receive HAdjustmentEvents sent from this object.
HSound	getAdjustmentSound() Get the sound to be played when the value changes.
int	getBlockIncrement() Get the block increment for this HAdjustmentValue.
int	getUnitIncrement() Get the unit increment for this HAdjustmentValue.
void	removeAdjustmentListener(HAdjustmentListener l) Removes the specified HAdjustmentListener so that it no longer receives HAdjustmentEvents from this object.
void	setAdjustmentSound(HSound sound) Associate a sound to be played when the value is modified.
void	setBlockIncrement(int increment) Set the block increment for this HAdjustmentValue.
void	setUnitIncrement(int increment) Set the unit increment for this HAdjustmentValue.

Methods inherited from interface org.havi.ui.HNavigable

addHFocusListener, getGainFocusSound, getLoseFocusSound, getMove, isSelected, removeHFocusListener, setFocusTraversal, setGainFocusSound, setLoseFocusSound, setMove

Methods inherited from interface org.havi.ui.HNavigationInputPreferred

getNavigationKeys, processHFocusEvent

Methods inherited from interface org.havi.ui.HAdjustmentInputPreferred

getAdjustMode, processHAdjustmentEvent, setAdjustMode

Methods inherited from interface org.havi.ui.HOrientable

getOrientation, setOrientation

Method Detail

setUnitIncrement

void setUnitIncrement(int increment)

Set the unit increment for this HAdjustmentValue.

Parameters:

increment - the amount by which the value of the HAdjustmentValue should change when an HAdjustmentEvent.ADJUST_LESS or HAdjustmentEvent.ADJUST_MORE event is received. Values of increment less than one shall be treated as a value of one.

getUnitIncrement

int getUnitIncrement()

Get the unit increment for this HAdjustmentValue. 1 shall be returned if this method is called before its corresponding set method.

Returns:

the increment value for this HAdjustmentValue.

setBlockIncrement

void setBlockIncrement(int increment)

Set the block increment for this HAdjustmentValue.

Parameters:

increment - the amount by which the value of the HAdjustmentValue should change when an HAdjustmentEvent.ADJUST_PAGE_LESS or HAdjustmentEvent.ADJUST_PAGE_MORE event is received. Values of increment less than one shall be treated as a value of one.

getBlockIncrement

int getBlockIncrement()

Get the block increment for this HAdjustmentValue. 1 shall be returned if this method is called before its corresponding set method.

Returns:

the block increment value for this HAdjustmentValue.

addAdjustmentListener

void addAdjustmentListener(HAdjustmentListener l)

Adds the specified HAdjustmentListener to receive HAdjustmentEvents sent from this object. If the listener has already been added further calls will add further references to the listener, which will then receive multiple copies of a single event.

Parameters:

l - the HAdjustmentListener to be notified.

removeAdjustmentListener

void removeAdjustmentListener(HAdjustmentListener l)

Removes the specified HAdjustmentListener so that it no longer receives HAdjustmentEvents from this object. If the specified listener is not registered, the method has no effect. If multiple references to a single listener have been registered it should be noted that this method will only remove one reference per call.

Parameters:

l - the HAdjustmentListener to be removed from notification.

setAdjustmentSound

void setAdjustmentSound(HSound sound)

Associate a sound to be played when the value is modified. The sound is played irrespective of whether an HAdjustmentEvent is sent to one or more listeners.

Parameters:

sound - the sound to be played, when the value is modified. If sound content is already set, the original content is replaced. To remove the sound specify a null HSound.

getAdjustmentSound

HSound getAdjustmentSound()

Get the sound to be played when the value changes. null shall be returned if this method is called before its corresponding set method.

Returns:

The sound played when the value changes