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Java Source Code / Java Documentation » Ajax » GWT » com.google.gwt.user.client.ui

Source Cross Reference

Class Diagram

Java Document (Java Doc)

com.google.gwt.user.client.ui .HasKeyPreview

HasKeyPreview
public interface HasKeyPreview (Code)
	A class that implements this interface receives a preview of keyboard events before they are passed to the focused widget. See Also: com.google.gwt.user.client.ui.KeyboardListener

Method Summary
boolean	onKeyDownPreview(char key, int modifiers) Called when a key-down event is received. Parameters: key - the physical key that was depressed.
boolean	onKeyPressPreview(char key, int modifiers) Called when a key-press event is received. Parameters: key - the Unicode character that was generated by the keyboard action. Parameters: modifiers - the modifier keys pressed at when the event occurred.
boolean	onKeyUpPreview(char key, int modifiers) Called when a key-up event is received. Parameters: key - the physical key that was released.

Method Detail

onKeyDownPreview
boolean onKeyDownPreview(char key, int modifiers)(Code)
	Called when a key-down event is received. Parameters: key - the physical key that was depressed. Constants for this valueare defined in this interface with the KEYCODE prefix. Parameters: modifiers - the modifier keys pressed at when the event occurred. Thisvalue is a combination of the bits defined byKeyboardListener.MODIFIER_SHIFT,KeyboardListener.MODIFIER_CTRL, andKeyboardListener.MODIFIER_ALT.

onKeyPressPreview
boolean onKeyPressPreview(char key, int modifiers)(Code)
	Called when a key-press event is received. Parameters: key - the Unicode character that was generated by the keyboard action. Parameters: modifiers - the modifier keys pressed at when the event occurred. Thisvalue is a combination of the bits defined byKeyboardListener.MODIFIER_SHIFT,KeyboardListener.MODIFIER_CTRL, andKeyboardListener.MODIFIER_ALT.

onKeyUpPreview
boolean onKeyUpPreview(char key, int modifiers)(Code)
	Called when a key-up event is received. Parameters: key - the physical key that was released. Constants for this value aredefined in this interface with the KEYCODE prefix. Parameters: modifiers - the modifier keys pressed at when the event occurred. Thisvalue is a combination of the bits defined byKeyboardListener.MODIFIER_SHIFT,KeyboardListener.MODIFIER_CTRL, andKeyboardListener.MODIFIER_ALT.

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