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java.lang.Objectjavax.swing.AbstractAction
org.tigris.gef.base.Cmd
org.tigris.gef.base.CmdNull
Cmd to do nothing. This might make some other code simpler. For example, keybinding query funcitons can return a "real" Cmd if there is one bound to the given key, and an instance of CmdNull if there is not. The alternative would be to return null and force the caller to check for null.
Field Summary |
Fields inherited from class org.tigris.gef.base.Cmd |
_args, _resource |
Fields inherited from class javax.swing.AbstractAction |
changeSupport, enabled |
Fields inherited from interface javax.swing.Action |
ACCELERATOR_KEY, ACTION_COMMAND_KEY, DEFAULT, LONG_DESCRIPTION, MNEMONIC_KEY, NAME, SHORT_DESCRIPTION, SMALL_ICON |
Constructor Summary | |
CmdNull()
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Method Summary | |
void |
doIt()
Do nothing |
void |
undoIt()
This is the only undo method that works :) |
Methods inherited from class org.tigris.gef.base.Cmd |
about, actionPerformed, cmdAtIndex, containsArg, getArg, getArg, getName, getResource, register, registeredCmds, setArg, setName, setResource, shouldBeEnabled, updateEnabled |
Methods inherited from class javax.swing.AbstractAction |
addPropertyChangeListener, clone, firePropertyChange, getKeys, getPropertyChangeListeners, getValue, isEnabled, putValue, removePropertyChangeListener, setEnabled |
Methods inherited from class java.lang.Object |
equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
public CmdNull()
Method Detail |
public void doIt()
doIt
in class Cmd
public void undoIt()
undoIt
in class Cmd
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