public class LaunchURL extends Object implements IWorkbenchWindowActionDelegate, IExecutableExtension
This class is intended to be specified as a value of a class attribute of an action element in plugin.xml for extensions of org.eclipse.ui.actionSets extension point. The URL to launch must be specified in the markup in one of two ways.The action element can have an attribute named url, in addition to markup required by org.eclipse.ui.actionSets extension point specification. The value of the url attribute should specify a URL to be opened in a browser. Alternatively, since 3.1, instead of a class attribute on the action element, the extension can specify a nested class element with a class attribute and URL specified in a parameter sub-element. For example:
<class class="org.eclipse.help.ui.browser.LaunchURL"> <parameter name="url" value="http://eclipse.org/" /> </class>
|Constructor and Description|
|Modifier and Type||Method and Description|
Disposes this action delegate.
Initializes this action delegate with the workbench window it will work in.
Performs this action.
Notifies this action delegate that the selection in the workbench has changed.
This method is called by the implementation of the method
public void dispose()
public void init(IWorkbenchWindow window)
window- the window that provides the context for this delegate
public void setInitializationData(IConfigurationElement config, String propertyName, Object data) throws CoreException
IConfigurationElement.createExecutableExtensionon a newly constructed extension, passing it its relevant configuration information. Most executable extensions only make use of the first two call arguments.
Regular executable extensions specify their Java implementation class name as an attribute of the configuration element for the extension. For example
<action run="com.example.BaseAction"/>In the above example, this method would be called with a reference to the
<action>element (first argument), and
"run"as the name of the attribute that defined this executable extension (second argument).
The last parameter is for the specific use of extension adapters and is typically not used by regular executable extensions.
There are two supported ways of associating additional adapter-specific data with the configuration in a way that is transparent to the extension point implementor:
(1) by specifying adapter data as part of the implementation
class attribute value. The Java class name can be followed
by a ":" separator, followed by any adapter data in string
form. For example, if the extension point specifies an attribute
"run" to contain the name of the extension implementation,
an adapter can be configured as
<action run="com.example.ExternalAdapter:./cmds/util.exe -opt 3"/>
(2) by converting the attribute used to specify the executable extension to a child element of the original configuration element, and specifying the adapter data in the form of xml markup. Using this form, the example above would become
runclass="com.xyz.ExternalAdapter"> <parameter name="exec" value="./cmds/util.exe"/> <parameter name="opt" value="3"/> </ run> </action>
Form (2) will typically only be used for extension points that anticipate the majority of extensions configured into it will in fact be in the form of adapters.
In either case, the specified adapter class is instantiated using its 0-argument public constructor. The adapter data is passed as the last argument of this method. The data argument is defined as Object. It can have the following values:
null, if no adapter data was supplied
Hashtablecontaining the actual parameter names and values (both
config- the configuration element used to trigger this execution. It can be queried by the executable extension for specific configuration properties
propertyName- the name of an attribute of the configuration element used on the
createExecutableExtension(String)call. This argument can be used in the cases where a single configuration element is used to define multiple executable extensions.
data- adapter data in the form of a
CoreException- if error(s) detected during initialization processing
IExecutableExtension.setInitializationData(IConfigurationElement, String, Object)
public void run(IAction action)
This method is called by the proxy action when the action has been triggered. Implement this method to do the actual work.
Note: If the action delegate also implements
IActionDelegate2, then this method is not invoked but
runWithEvent(IAction, Event) method is called.
public void selectionChanged(IAction action, ISelection selection)
Implementers can use this opportunity to change the availability of the action or to modify other presentation properties.
When the selection changes, the action enablement state is updated based on the criteria specified in the plugin.xml file. Then the delegate is notified of the selection change regardless of whether the enablement criteria in the plugin.xml file is met.
action- the action proxy that handles presentation portion of the action
selection- the current selection, or
nullif there is no selection.
Copyright (c) 2000, 2014 Eclipse Contributors and others. All rights reserved.Guidelines for using Eclipse APIs.