Package ucar.ui.util

Class SwingUtils

java.lang.Object

ucar.ui.util.SwingUtils

public final class SwingUtils
extends Object

A collection of utility methods for Swing.

See Also:

"http://tips4java.wordpress.com/2008/11/13/swing-utils/"

Field Summary

Fields

Modifier and Type	Field	Description
static Object	NOT_NULL

Method Summary

Modifier and Type	Method	Description
static boolean	equals(Object obj1, Object obj2)	Convenience method for determining whether two objects are either equal or both null.
static Map<JComponent,List<JComponent>>	getComponentMap(JComponent container, boolean nested)	Convenience method for mapping a container in the hierarchy to its contained components.
static <T extends JComponent> T	getDescendantOfClass(Class<T> clazz, Container container, String property, Object value)	Convenience method that searches below container in the component hierarchy in a depth first manner and returns the first found component of class clazz having the bound property value.
static <T extends JComponent> T	getDescendantOfClass(Class<T> clazz, Container container, String property, Object value, boolean nested)	Convenience method that searches below container in the component hierarchy in a depth first manner and returns the first found component of class clazz having the bound property value.
static <T extends JComponent> T	getDescendantOfType(Class<T> clazz, Container container, String property, Object value)	Convenience method that searches below container in the component hierarchy and returns the first found component that is an instance of class clazz having the bound property value.
static <T extends JComponent> T	getDescendantOfType(Class<T> clazz, Container container, String property, Object value, boolean nested)	Convenience method that searches below container in the component hierarchy and returns the first found component that is an instance of class clazz and has the bound property value.
static <T extends JComponent> List<T>	getDescendantsOfClass(Class<T> clazz, Container container)	Convenience method for searching below container in the component hierarchy and return nested components of class clazz it finds.
static <T extends JComponent> List<T>	getDescendantsOfClass(Class<T> clazz, Container container, boolean nested)	Convenience method for searching below container in the component hierarchy and return nested components of class clazz it finds.
static <T extends JComponent> List<T>	getDescendantsOfType(Class<T> clazz, Container container)	Convenience method for searching below container in the component hierarchy and return nested components that are instances of class clazz it finds.
static <T extends JComponent> List<T>	getDescendantsOfType(Class<T> clazz, Container container, boolean nested)	Convenience method for searching below container in the component hierarchy and return nested components that are instances of class clazz it finds.
static <T extends JComponent> Class	getJClass(T component)	Convenience method to obtain the Swing class from which this component was directly or indirectly derived.
static Map<Object,Object>	getProperties(JComponent component)	Convenience method for obtaining most non-null human readable properties of a JComponent.
static Object	getUIDefaultOfClass(Class clazz, String property)	Convenience method for retrieving the UIDefault for a single property of a particular class.
static UIDefaults	getUIDefaultsOfClass(Class clazz)	Convenience method for retrieving a subset of the UIDefaults pertaining to a particular class.
static UIDefaults	getUIDefaultsOfClass(String className)	Convenience method for retrieving a subset of the UIDefaults pertaining to a particular class.

Methods inherited from class java.lang.Object

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

Field Detail

NOT_NULL

public static final Object NOT_NULL

Method Detail

getDescendantsOfType

public static <T extends JComponent> List<T> getDescendantsOfType(Class<T> clazz,
                                                                  Container container)

Convenience method for searching below container in the component hierarchy and return nested components that are instances of class clazz it finds. Returns an empty list if no such components exist in the container.

Invoking this method with a class parameter of JComponent.class will return all nested components.

This method invokes getDescendantsOfType(clazz, container, true)

Parameters:

clazz - the class of components whose instances are to be found.

container - the container at which to begin the search

Returns:

the List of components

getDescendantsOfType

public static <T extends JComponent> List<T> getDescendantsOfType(Class<T> clazz,
                                                                  Container container,
                                                                  boolean nested)

Convenience method for searching below container in the component hierarchy and return nested components that are instances of class clazz it finds. Returns an empty list if no such components exist in the container.

Invoking this method with a class parameter of JComponent.class will return all nested components.

Parameters:

clazz - the class of components whose instances are to be found.

container - the container at which to begin the search

nested - true to list components nested within another listed component, false otherwise

Returns:

the List of components

getDescendantOfType

public static <T extends JComponent> T getDescendantOfType(Class<T> clazz,
                                                           Container container,
                                                           String property,
                                                           Object value)
                                                    throws IllegalArgumentException

Convenience method that searches below container in the component hierarchy and returns the first found component that is an instance of class clazz having the bound property value. Returns null if such component cannot be found.

This method invokes getDescendantOfType(clazz, container, property, value, true)

Parameters:

clazz - the class of component whose instance is to be found.

container - the container at which to begin the search

property - the className of the bound property, exactly as expressed in the accessor e.g. "Text" for getText(), "Value" for getValue().

value - the value of the bound property

Returns:

the component, or null if no such component exists in the container

Throws:

IllegalArgumentException - if the bound property does not exist for the class or cannot be accessed

getDescendantOfType

public static <T extends JComponent> T getDescendantOfType(Class<T> clazz,
                                                           Container container,
                                                           String property,
                                                           Object value,
                                                           boolean nested)
                                                    throws IllegalArgumentException

Convenience method that searches below container in the component hierarchy and returns the first found component that is an instance of class clazz and has the bound property value. Returns null if such component cannot be found.

Parameters:

clazz - the class of component whose instance to be found.

container - the container at which to begin the search

property - the className of the bound property, exactly as expressed in the accessor e.g. "Text" for getText(), "Value" for getValue().

value - the value of the bound property

nested - true to list components nested within another component which is also an instance of clazz, false otherwise

Returns:

the component, or null if no such component exists in the container

Throws:

IllegalArgumentException - if the bound property does not exist for the class or cannot be accessed

getDescendantsOfClass

public static <T extends JComponent> List<T> getDescendantsOfClass(Class<T> clazz,
                                                                   Container container)

Convenience method for searching below container in the component hierarchy and return nested components of class clazz it finds. Returns an empty list if no such components exist in the container.

This method invokes getDescendantsOfClass(clazz, container, true)

Parameters:

clazz - the class of components to be found.

container - the container at which to begin the search

Returns:

the List of components

getDescendantsOfClass

public static <T extends JComponent> List<T> getDescendantsOfClass(Class<T> clazz,
                                                                   Container container,
                                                                   boolean nested)

Convenience method for searching below container in the component hierarchy and return nested components of class clazz it finds. Returns an empty list if no such components exist in the container.

Parameters:

clazz - the class of components to be found.

container - the container at which to begin the search

nested - true to list components nested within another listed component, false otherwise

Returns:

the List of components

getDescendantOfClass

public static <T extends JComponent> T getDescendantOfClass(Class<T> clazz,
                                                            Container container,
                                                            String property,
                                                            Object value)
                                                     throws IllegalArgumentException

Convenience method that searches below container in the component hierarchy in a depth first manner and returns the first found component of class clazz having the bound property value.

Returns null if such component cannot be found.

This method invokes getDescendantOfClass(clazz, container, property, value, true)

Parameters:

clazz - the class of component to be found.

container - the container at which to begin the search

property - the className of the bound property, exactly as expressed in the accessor e.g. "Text" for getText(), "Value" for getValue(). This parameter is case sensitive.

value - the value of the bound property

Returns:

the component, or null if no such component exists in the container's hierarchy.

Throws:

IllegalArgumentException - if the bound property does not exist for the class or cannot be accessed

getDescendantOfClass

public static <T extends JComponent> T getDescendantOfClass(Class<T> clazz,
                                                            Container container,
                                                            String property,
                                                            Object value,
                                                            boolean nested)
                                                     throws IllegalArgumentException

Convenience method that searches below container in the component hierarchy in a depth first manner and returns the first found component of class clazz having the bound property value.

Returns null if such component cannot be found.

Parameters:

clazz - the class of component to be found.

container - the container at which to begin the search

property - the className of the bound property, exactly as expressed in the accessor e.g. "Text" for getText(), "Value" for getValue(). This parameter is case sensitive.

value - the value of the bound property

nested - true to include components nested within another listed component, false otherwise

Returns:

the component, or null if no such component exists in the container's hierarchy

Throws:

IllegalArgumentException - if the bound property does not exist for the class or cannot be accessed

equals

public static boolean equals(Object obj1,
                             Object obj2)

Convenience method for determining whether two objects are either equal or both null.

Parameters:

obj1 - the first reference object to compare.

obj2 - the second reference object to compare.

Returns:

true if obj1 and obj2 are equal or if both are null, false otherwise

getComponentMap

public static Map<JComponent,List<JComponent>> getComponentMap(JComponent container,
                                                                     boolean nested)

Convenience method for mapping a container in the hierarchy to its contained components. The keys are the containers, and the values are lists of contained components.

Implementation note: The returned value is a HashMap and the values are of type ArrayList. This is subject to change, so callers should code against the interfaces Map and List.

Parameters:

container - The JComponent to be mapped

nested - true to drill down to nested containers, false otherwise

Returns:

the Map of the UI

getUIDefaultsOfClass

public static UIDefaults getUIDefaultsOfClass(Class clazz)

Convenience method for retrieving a subset of the UIDefaults pertaining to a particular class.

Parameters:

clazz - the class of interest

Returns:

the UIDefaults of the class

getUIDefaultsOfClass

public static UIDefaults getUIDefaultsOfClass(String className)

Convenience method for retrieving a subset of the UIDefaults pertaining to a particular class.

Parameters:

className - fully qualified name of the class of interest

Returns:

the UIDefaults of the class named

getUIDefaultOfClass

public static Object getUIDefaultOfClass(Class clazz,
                                         String property)

Convenience method for retrieving the UIDefault for a single property of a particular class.

Parameters:

clazz - the class of interest

property - the property to query

Returns:

the UIDefault property, or null if not found

getProperties

public static Map<Object,Object> getProperties(JComponent component)

Convenience method for obtaining most non-null human readable properties of a JComponent. Array properties are not included.

Implementation note: The returned value is a HashMap. This is subject to change, so callers should code against the interface Map.

Parameters:

component - the component whose proerties are to be determined

Returns:

the class and value of the properties

getJClass

public static <T extends JComponent> Class getJClass(T component)

Convenience method to obtain the Swing class from which this component was directly or indirectly derived.

Parameters:

component - The component whose Swing superclass is to be determined

Returns:

The nearest Swing class in the inheritance tree