Package icyllis.modernui.text.method

Class TextKeyListener

java.lang.Object

icyllis.modernui.text.method.TextKeyListener

@ParametersAreNonnullByDefault
public final class TextKeyListener
extends Object

Provides methods for handling text additions and deletions in a TextView.

Method Summary

Modifier and Type	Method	Description
boolean	backspace(TextView view, Editable content, KeyEvent event)	Performs the action that happens when you press the KeyEvent.KEY_BACKSPACE key in a TextView.
boolean	forwardDelete(TextView view, Editable content, KeyEvent event)	Performs the action that happens when you press the KeyEvent.KEY_DELETE key in a TextView.
static TextKeyListener	getInstance()
static int	getMetaState(CharSequence text, int meta)	Gets the state of a particular meta key.
static boolean	isMetaTracker(Object what)	Returns true if this object is one that this class would use to keep track of any meta state in the specified text.
boolean	onKeyDown(TextView view, Editable content, int keyCode, KeyEvent event)	If the key listener wants to handle this key, return true, otherwise return false and the caller (i.e. the widget host) will handle the key.
boolean	onKeyUp(TextView view, Editable content, int keyCode, KeyEvent event)	If the key listener wants to handle this key release, return true, otherwise return false and the caller (i.e. the widget host) will handle the key.
static void	resetMetaState(Spannable text)	Resets all meta state to inactive.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

getInstance

public static TextKeyListener getInstance()

resetMetaState

public static void resetMetaState(Spannable text)

Resets all meta state to inactive.

getMetaState

public static int getMetaState(CharSequence text,
 int meta)

Gets the state of a particular meta key.

Parameters:

text - the buffer in which the meta key would have been pressed.

meta - META_SHIFT_ON, META_ALT_ON, META_SYM_ON

Returns:

0 if inactive, 1 if active, 2 if locked.

isMetaTracker

public static boolean isMetaTracker(Object what)

Returns true if this object is one that this class would use to keep track of any meta state in the specified text.

onKeyDown

public boolean onKeyDown(TextView view,
 Editable content,
 int keyCode,
 KeyEvent event)

If the key listener wants to handle this key, return true, otherwise return false and the caller (i.e. the widget host) will handle the key.

onKeyUp

public boolean onKeyUp(TextView view,
 Editable content,
 int keyCode,
 KeyEvent event)

If the key listener wants to handle this key release, return true, otherwise return false and the caller (i.e. the widget host) will handle the key.

backspace

public boolean backspace(TextView view,
 Editable content,
 KeyEvent event)

Performs the action that happens when you press the KeyEvent.KEY_BACKSPACE key in a TextView. If there is a selection, deletes the selection; otherwise, deletes the character before the cursor, if any; ALT+DEL deletes everything on the line the cursor is on.

Returns:

true if anything was deleted; false otherwise.

forwardDelete

public boolean forwardDelete(TextView view,
 Editable content,
 KeyEvent event)

Performs the action that happens when you press the KeyEvent.KEY_DELETE key in a TextView. If there is a selection, deletes the selection; otherwise, deletes the character before the cursor, if any; ALT+FORWARD_DEL deletes everything on the line the cursor is on.

Returns:

true if anything was deleted; false otherwise.