org.vishia.gral.swt

Class SwtKeyListener

java.lang.Object

org.vishia.gral.swt.SwtKeyListener

All Implemented Interfaces:

java.util.EventListener, org.eclipse.swt.events.KeyListener, org.eclipse.swt.internal.SWTEventListener, GralKeySpecial_ifc

Direct Known Subclasses:

SwtButton.KeyListener, SwtTextBox.TextBoxKeyListener, SwtTextFieldWrapper.TextFieldKeyListener

public class SwtKeyListener
extends java.lang.Object
implements GralKeySpecial_ifc, org.eclipse.swt.events.KeyListener

A common key listener implementation for SWT. It is applied to all widgets. Derived forms exists for special SWT-widgets. This class is instanciated one time in the SwtMng. A Widget can be completed with this key listener. On all keys the GralUserAction given in the GralWidget#getActionChange() is called

If the method returns false, the central key action given in GralMng#getRegisteredUserAction(String) for "keyAction" is tried to get and then invoked with cmd = "key" and the key code in params[0]. This central keyAction may be used for application centralized keys without association to the table itself.

See Also:

GralKeyListener

Field Summary

Fields

Modifier and Type	Field and Description
private GralKeyListener	keyAction
static int	version Version and history 2011-12-03 Hartmut created.

Constructor Summary

Constructors

Constructor and Description
SwtKeyListener(GralKeyListener keyAction)

Method Summary

Modifier and Type	Method and Description
void	keyPressed(org.eclipse.swt.events.KeyEvent keyEv)
void	keyReleased(org.eclipse.swt.events.KeyEvent arg0)
boolean	specialKeysOfWidgetType(int key, GralWidget_ifc widgg, java.lang.Object widgImpl) This method can be overridden by specialized classes of this.

Methods inherited from class java.lang.Object

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

Field Detail

version

public static final int version

Version and history

• 2011-12-03 Hartmut created. Any widget may have the same key listener.

See Also:

Constant Field Values

keyAction

private final GralKeyListener keyAction

Constructor Detail

SwtKeyListener

public SwtKeyListener(GralKeyListener keyAction)

Method Detail

keyPressed

public void keyPressed(org.eclipse.swt.events.KeyEvent keyEv)

Specified by:

keyPressed in interface org.eclipse.swt.events.KeyListener

keyReleased

public void keyReleased(org.eclipse.swt.events.KeyEvent arg0)

Specified by:

keyReleased in interface org.eclipse.swt.events.KeyListener

specialKeysOfWidgetType

public boolean specialKeysOfWidgetType(int key,
                                       GralWidget_ifc widgg,
                                       java.lang.Object widgImpl)

Description copied from interface: GralKeySpecial_ifc

This method can be overridden by specialized classes of this. This method is called firstly. Note if a special key should be handled in the GralWidget#getActionChange() then this special handling should be programmed in the derived class. If this method returns true, the key is not applied to the action and not applied to the common handling.

Specified by:

specialKeysOfWidgetType in interface GralKeySpecial_ifc

Returns:

true if the key is processed.