Class ApplicationAction
- All Implemented Interfaces:
ActionListener
,Serializable
,Cloneable
,EventListener
,Action
Action
class used to implement the
@Action annotation. This class is typically not
instantiated directly, it's created as a side effect of constructing
an ApplicationActionMap:
public class MyActions { @Action public void anAction() { } // an @Action named "anAction" } ApplicationContext ac = ApplicationContext.getInstance(); ActionMap actionMap = ac.getActionMap(new MyActions()); myButton.setAction(actionMap.get("anAction"));
When an ApplicationAction is constructed, it initializes all of its
properties from the specified ResourceMap. Resource names
must match the @Action's
name, which is the name of the
corresponding method, or the value of the optional @Action
name
parameter. To initialize the text and shortDescription properties
of the action named "anAction" in the previous example, one
would define two resources:
anAction.Action.text = Button/Menu/etc label text for anAction anAction.Action.shortDescription = Tooltip text for anAction
A complete description of the mapping between resources and Action
properties can be found in the ApplicationAction constructor
documentation.
An ApplicationAction's enabled and selected
properties can be delegated to boolean properties of the
Actions class, by specifying the corresponding property names.
This can be done with the @Action
annotation, e.g.:
public class MyActions { @Action(enabledProperty = "anActionEnabled") public void anAction() { } public boolean isAnActionEnabled() { // will fire PropertyChange when anActionEnabled changes return anActionEnabled; } }If the MyActions class supports PropertyChange events, then then ApplicationAction will track the state of the specified property ("anActionEnabled" in this case) with a PropertyChangeListener.
ApplicationActions can automatically block the GUI while the actionPerformed method is running, depending on the value of block annotation parameter. For example, if the value of block is Task.BlockingScope.ACTION, then the action will be disabled while the actionPerformed method runs.
An ApplicationAction can have a proxy Action, i.e. another Action that provides the actionPerformed method, the enabled/selected properties, and values for the Action's long and short descriptions. If the proxy property is set, this ApplicationAction tracks all of the aforementioned properties, and the actionPerformed method just calls the proxy's actionPerformed method. If a proxySource is specified, then it becomes the source of the ActionEvent that's passed to the proxy actionPerformed method. Proxy action dispatching is as simple as this:
public void actionPerformed(ActionEvent actionEvent) { javax.swing.Action proxy = getProxy(); if (proxy != null) { actionEvent.setSource(getProxySource()); proxy.actionPerformed(actionEvent); } // .... }
- See Also:
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Field Summary
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
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Constructor Summary
ConstructorsConstructorDescriptionApplicationAction
(ApplicationActionMap appAM, ResourceMap resourceMap, String baseName, Method actionMethod, String enabledProperty, String selectedProperty, Task.BlockingScope block) Construct an ApplicationAction that implements an @Action. -
Method Summary
Modifier and TypeMethodDescriptionvoid
actionPerformed
(ActionEvent actionEvent) This method implements this Action's behavior.protected Object
getActionArgument
(Class pType, String pKey, ActionEvent actionEvent) Provides parameter values to @Action methods.getName()
The name of this Action.getProxy()
Return the proxy for this action or null.Return the value that becomes the ActionEvent source before the ActionEvent is passed along to the proxy Action.The resourceMap for this Action.boolean
If the proxy action is null andenabledProperty
was specified, then return the value of the enabled property's is/get method applied to our ApplicationActionMap'sactionsObject
.boolean
If the proxy action is null andselectedProperty
was specified, then return the value of the selected property's is/get method applied to our ApplicationActionMap'sactionsObject
.void
Keeps the@Action selectedProperty
in sync when the value ofkey
isAction.SELECTED_KEY
.void
setEnabled
(boolean enabled) If the proxy action is null andenabledProperty
was specified, then set the value of the enabled property by invoking the correspondingset
method on our ApplicationActionMap'sactionsObject
.void
Set the proxy for this action.void
setProxySource
(Object source) Set the value that becomes the ActionEvent source before the ActionEvent is passed along to the proxy Action.void
setSelected
(boolean selected) If the proxy action is null andselectedProperty
was specified, then set the value of the selected property by invoking the correspondingset
method on our ApplicationActionMap'sactionsObject
.toString()
Returns a string representation of this ApplicationAction that should be useful for debugging.Methods inherited from class javax.swing.AbstractAction
addPropertyChangeListener, clone, firePropertyChange, getKeys, getPropertyChangeListeners, getValue, removePropertyChangeListener
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Constructor Details
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ApplicationAction
public ApplicationAction(ApplicationActionMap appAM, ResourceMap resourceMap, String baseName, Method actionMethod, String enabledProperty, String selectedProperty, Task.BlockingScope block) Construct an ApplicationAction that implements an @Action.If a
ResourceMap
is provided, then all of theAction
properties are initialized with the values of resources whose key begins withbaseName
. ResourceMap keys are created by appending an @Action resource name, like "Action.shortDescription" to the @Action's baseName For example, Given an @Action defined like this:@Action void actionBaseName() { }
Then the shortDescription resource key would be
actionBaseName.Action.shortDescription
, as in:actionBaseName.Action.shortDescription = Do perform some action
The complete set of @Action resources is:
Action.icon Action.text Action.shortDescription Action.longDescription Action.smallIcon Action.largeIcon Action.command Action.accelerator Action.mnemonic Action.displayedMnemonicIndex
A few the resources are handled specially:
- Action.text
Used to initialize the Action properties with keys Action.NAME, Action.MNEMONIC_KEY and Action.DISPLAYED_MNEMONIC_INDEX. If the resources's value contains an "invalid input: '&'" or an "_" it's assumed to mark the following character as the mnemonic. If Action.mnemonic/Action.displayedMnemonic resources are also defined (an odd case), they'll override the mnemonic specfied with the Action.text marker character. - Action.icon
Used to initialize both ACTION.SMALL_ICON,LARGE_ICON. If Action.smallIcon or Action.largeIcon resources are also defined they'll override the value defined for Action.icon. - Action.displayedMnemonicIndexKey
The corresponding javax.swing.Action constant is only defined in Java SE 6. We'll set the Action property in Java SE 5 too.
- Parameters:
appAM
- the ApplicationActionMap this action is being constructed for.resourceMap
- initial Action properties are loaded from this ResourceMap.baseName
- the name of the @ActionactionMethod
- unless a proxy is specified, actionPerformed calls this method.enabledProperty
- name of the enabled property.selectedProperty
- name of the selected property.block
- how much of the GUI to block while this action executes.- See Also:
- Action.text
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Method Details
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getProxy
Return the proxy for this action or null.- Returns:
- the value of the proxy property.
- See Also:
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setProxy
Set the proxy for this action. If the proxy is non-null then we delegate/track the following:- actionPerformed
Our actionPerformed method calls the delegate's after the ActionEvent source to be the value of getProxySource - shortDescription
If the proxy's shortDescription, i.e. the value for keySHORT_DESCRIPTION
is not null, then set this action's shortDescription. Most Swing components use the shortDescription to initialize their tooltip. - longDescription
If the proxy's longDescription, i.e. the value for keyLONG_DESCRIPTION
is not null, then set this action's longDescription.
- See Also:
- actionPerformed
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getProxySource
Return the value that becomes the ActionEvent source before the ActionEvent is passed along to the proxy Action.- Returns:
- the value of the proxySource property.
- See Also:
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setProxySource
Set the value that becomes the ActionEvent source before the ActionEvent is passed along to the proxy Action.- Parameters:
source
- the ActionEvent source/- See Also:
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getName
The name of this Action. This string begins with the name the corresponding @Action method (unless the name @Action parameter was specified).This name is used as a prefix to look up action resources, and the ApplicationContext Framework uses it as the key for this Action in ApplicationActionMaps.
Note: this property should not confused with the
Action.NAME
key. That key is actually used to initialize the text properties of Swing components, which is why we call the corresponding ApplicationAction resource "Action.text", as in:myCloseButton.Action.text = Close
- Returns:
- the (read-only) value of the name property
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getResourceMap
The resourceMap for this Action.- Returns:
- the (read-only) value of the resourceMap property
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getActionArgument
Provides parameter values to @Action methods. By default, parameter values are selected based exclusively on their type:Parameter Type Parameter Value ActionEvent actionEvent javax.swing.Action this ApplicationAction object ActionMap the ActionMap that contains this Action ResourceMap the ResourceMap of the the ActionMap that contains this Action ApplicationContext the value of ApplicationContext.getInstance() ApplicationAction subclasses may also select values based on the value of the Action.Parameter annotation, which is passed along as the pKey argument to this method:
@Action public void doAction(@Action.Parameter("myKey") String myParameter) { // The value of myParameter is computed by: // getActionArgument(String.class, "myKey", actionEvent) }
If pType and pKey aren't recognized, this method calls
actionFailed(java.awt.event.ActionEvent, java.lang.Exception)
with an IllegalArgumentException.- Parameters:
pType
- parameter typepKey
- the value of the @Action.Parameter annotationactionEvent
- the ActionEvent that trigged this Action
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actionPerformed
This method implements this Action's behavior.If there's a proxy Action then call its actionPerformed method. Otherwise, call the @Action method with parameter values provided by
getActionArgument()
. If anything goes wrong callactionFailed()
.- Parameters:
actionEvent
- @{inheritDoc}- See Also:
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isEnabled
public boolean isEnabled()If the proxy action is null andenabledProperty
was specified, then return the value of the enabled property's is/get method applied to our ApplicationActionMap'sactionsObject
. Otherwise return the value of this Action's enabled property.- Specified by:
isEnabled
in interfaceAction
- Overrides:
isEnabled
in classAbstractAction
- Returns:
- See Also:
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setEnabled
public void setEnabled(boolean enabled) If the proxy action is null andenabledProperty
was specified, then set the value of the enabled property by invoking the correspondingset
method on our ApplicationActionMap'sactionsObject
. Otherwise set the value of this Action's enabled property.- Specified by:
setEnabled
in interfaceAction
- Overrides:
setEnabled
in classAbstractAction
- Parameters:
enabled
-- See Also:
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isSelected
public boolean isSelected()If the proxy action is null andselectedProperty
was specified, then return the value of the selected property's is/get method applied to our ApplicationActionMap'sactionsObject
. Otherwise return the value of this Action's enabled property.- Returns:
- true if this Action's JToggleButton is selected
- See Also:
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setSelected
public void setSelected(boolean selected) If the proxy action is null andselectedProperty
was specified, then set the value of the selected property by invoking the correspondingset
method on our ApplicationActionMap'sactionsObject
. Otherwise set the value of this Action's selected property.- Parameters:
selected
- this Action's JToggleButton's value- See Also:
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putValue
Keeps the@Action selectedProperty
in sync when the value ofkey
isAction.SELECTED_KEY
.- Specified by:
putValue
in interfaceAction
- Overrides:
putValue
in classAbstractAction
- Parameters:
key
-value
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toString
Returns a string representation of this ApplicationAction that should be useful for debugging. If the action is enabled it's name is enclosed by parentheses; if it's selected then a "+" appears after the name. If the action will appear with a text label, then that's included too. If the action has a proxy, then we append the string for the proxy action.
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