org.jdesktop.swingx.renderer

Class HyperlinkProvider

java.lang.Object

org.jdesktop.swingx.renderer.ComponentProvider<JXHyperlink>

org.jdesktop.swingx.renderer.HyperlinkProvider

All Implemented Interfaces:

Serializable, UIDependent, RolloverRenderer

public class HyperlinkProvider
extends ComponentProvider<JXHyperlink>
implements RolloverRenderer

Renderer for hyperlinks".

The renderer is configured with a LinkAction. It's mostly up to the developer to guarantee that the all values which are passed into the getXXRendererComponent(...) are compatible with T: she can provide a runtime class to check against. If it isn't the renderer will configure the action with a null target.

It's recommended to not use the given Action anywhere else in code, as it is updated on each getXXRendererComponent() call which might lead to undesirable side-effects.

Internally uses JXHyperlink as rendering component.

PENDING: can go from ButtonProvider?

PENDING: make renderer respect selected cell state.

PENDING: TreeCellRenderer has several issues

1. no icons
2. usual background highlighter issues

Author:

Jeanette Winzenburg

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected Class<?>	targetClass

Fields inherited from class org.jdesktop.swingx.renderer.ComponentProvider

alignment, defaultVisuals, formatter, rendererComponent

Constructor Summary

Constructors

Constructor and Description
HyperlinkProvider() Instantiate a LinkRenderer with null LinkAction and null targetClass.
HyperlinkProvider(AbstractHyperlinkAction linkAction) Instantiate a LinkRenderer with the LinkAction to use with target values.
HyperlinkProvider(AbstractHyperlinkAction linkAction, Class<?> targetClass) Instantiate a LinkRenderer with a LinkAction to use with target values and the type of values the action can cope with.

Method Summary

Modifier and Type	Method and Description
protected void	configureState(CellContext context) Configures the rendering component's state from the given cell context.
protected AbstractHyperlinkAction	createDefaultLinkAction() default action - does nothing...
protected JXHyperlink	createRendererComponent() Factory method to create and return the component to use for rendering.
void	doClick() Same as AbstractButton.doClick().
protected void	format(CellContext context) Formats the renderering component's content from the given cell context.
String	getString(Object value) Returns a string representation of the content.
boolean	isEnabled()
boolean	isTargetable(Object target) decides if the given target is acceptable for setTarget.
void	setLinkAction(AbstractHyperlinkAction linkAction) Sets the LinkAction for handling the values.
void	setLinkAction(AbstractHyperlinkAction linkAction, Class<?> targetClass) Sets the LinkAction for handling the values and the class the action can handle.
void	setTargetClass(Class<?> targetClass) Sets the class the action is supposed to handle.

Methods inherited from class org.jdesktop.swingx.renderer.ComponentProvider

configureContent, configureVisuals, createDefaultVisuals, getDefaultVisuals, getHorizontalAlignment, getRendererComponent, getStringValue, getValueAsIcon, getValueAsString, setHorizontalAlignment, setStringValue, updateUI

Methods inherited from class java.lang.Object

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

Field Detail

targetClass

protected Class<?> targetClass

Constructor Detail

HyperlinkProvider

public HyperlinkProvider()

Instantiate a LinkRenderer with null LinkAction and null targetClass.

HyperlinkProvider

public HyperlinkProvider(AbstractHyperlinkAction linkAction)

Instantiate a LinkRenderer with the LinkAction to use with target values.

Parameters:

linkAction - the action that acts on values.

HyperlinkProvider

public HyperlinkProvider(AbstractHyperlinkAction linkAction,
                         Class<?> targetClass)

Instantiate a LinkRenderer with a LinkAction to use with target values and the type of values the action can cope with.

It's up to developers to take care of matching types.

Parameters:

linkAction - the action that acts on values.

targetClass - the type of values the action can handle.

Method Detail

setTargetClass

public void setTargetClass(Class<?> targetClass)

Sets the class the action is supposed to handle.

PENDING: make sense to set independently of LinkAction?

Parameters:

targetClass - the type of values the action can handle.

setLinkAction

public void setLinkAction(AbstractHyperlinkAction linkAction)

Sets the LinkAction for handling the values.

The action is assumed to be able to cope with any type, that is this method is equivalent to setLinkAction(linkAction, null).

Parameters:

linkAction -

setLinkAction

public void setLinkAction(AbstractHyperlinkAction linkAction,
                          Class<?> targetClass)

Sets the LinkAction for handling the values and the class the action can handle.

PENDING: in the general case this is not independent of the targetClass. Need api to set them combined?

Parameters:

linkAction -

isTargetable

public boolean isTargetable(Object target)

decides if the given target is acceptable for setTarget.

target == null is acceptable for all types. targetClass == null is the same as Object.class

Parameters:

target - the target to set.

Returns:

true if setTarget can cope with the object, false otherwise.

createDefaultLinkAction

protected AbstractHyperlinkAction createDefaultLinkAction()

default action - does nothing... except showing the target.

Returns:

a default LinkAction for showing the target.

isEnabled

public boolean isEnabled()

Specified by:

isEnabled in interface RolloverRenderer

Returns:

true if rollover effects are on and clickable.

doClick

public void doClick()

Description copied from interface: RolloverRenderer

Same as AbstractButton.doClick(). It's up to client code to prepare the renderer's component before calling this method.

Specified by:

doClick in interface RolloverRenderer

getString

public String getString(Object value)

Returns a string representation of the content.

This method guarantees to return the same string representation as would appear in the renderer, given that the corresponding cellContext has the same value as the parameter passed-in here. That is (assuming that the rendering component has a getText())

 if (equals(value, context.getValue()) {
     assertEquals(provider.getString(value), 
     provider.getRenderingComponent(context).getText());
 }
 

This implementation simply delegates to its StringValue. Subclasses might need to override to comply.

This is a second attempt - the driving force is the need for a consistent string representation across all (new and old) themes: rendering, (pattern) filtering/highlighting, searching, auto-complete ...

PENDING JW: Needs to be overridden - doesn't comply to contract!. Not sure how to do it without disturbing the hyperlinks current setting? All hyperlink properties are defined by the LinkAction configured with the target ...

Overrides:

getString in class ComponentProvider<JXHyperlink>

Parameters:

value - the object to represent as string.

Returns:

a appropriate string representation of the cell's content.

configureState

protected void configureState(CellContext context)

Configures the rendering component's state from the given cell context.

Overridden to set the hyperlink's rollover state.

Specified by:

configureState in class ComponentProvider<JXHyperlink>

Parameters:

context - the cell context to configure from, must not be null.

format

protected void format(CellContext context)

Formats the renderering component's content from the given cell context. Overridden to set the LinkAction's target to the context's value, if targetable.

Forces foreground color to the one defined by hyperlink for unselected cells, doesn't change the foreground for selected (as darkish text on dark selection background might be unreadable, Issue #840-swingx). Not entirely safe because the unselected background might be dark as well. Need to find a better way in the long run. Until then, client code can use Highlighters to repair (which is nasty!).

PENDING JW: by-passes XXValues - state currently is completely defined by the action. Hmm ...

Specified by:

format in class ComponentProvider<JXHyperlink>

Parameters:

context - the cell context to configure from, must not be null.

createRendererComponent

protected JXHyperlink createRendererComponent()

Factory method to create and return the component to use for rendering.

Specified by:

createRendererComponent in class ComponentProvider<JXHyperlink>

Returns:

the component to use for rendering.