org.eclipse.ptp.pldt.common.actions
Class AnalysisDropdownHandler

java.lang.Object
  org.eclipse.core.commands.common.EventManager
      org.eclipse.core.commands.AbstractHandler
          org.eclipse.ptp.pldt.common.actions.AnalysisDropdownHandler

All Implemented Interfaces:

java.util.EventListener, org.eclipse.core.commands.IHandler, org.eclipse.core.commands.IHandler2, org.eclipse.ui.ISelectionListener

public class AnalysisDropdownHandler
extends org.eclipse.core.commands.AbstractHandler
implements org.eclipse.ui.ISelectionListener

Default handler for the "Parallel Analysis" toolbar icon command - the work would be done by the menus that get registered (by other plugins) to appear beneath it, but this itself can do something useful by repeating the last-initiated submenu action. ("Do the last thing again") This class also acts as a single point to cache the current structured selection so that when a menu item is selected, the current selection can be accessed. It registers as a selection listener to actively listen for selection changes, instead of relying on HandlerUtil which won't get the first one (e.g. before the plugin is loaded).

Field Summary

protected static AnalysisDropdownHandler	instance
protected static RunAnalyseHandler	lastAnalysisHandler
protected static org.eclipse.jface.viewers.IStructuredSelection	lastAnalysisSelection
protected org.eclipse.jface.viewers.IStructuredSelection	lastSelection

Constructor Summary

AnalysisDropdownHandler()
Constructor: set singleton instance, and set up selection listener to listen for selections so we can report them more efficiently than relying on HandlerUtil.getCurrentSelection(); if the current selection isn't a structured selection (e.g. editor selection or something we don't care about) then we want the last structured selection.

Method Summary

java.lang.Object	execute(org.eclipse.core.commands.ExecutionEvent event)
static AnalysisDropdownHandler	getInstance() Get the singleton instance of this class, probably for accessing its knowledge about the current/last selection of interest.
static org.eclipse.jface.viewers.IStructuredSelection	getLastAnalysisSelection() For repeat analysis (clicking on the icon in the toolbar) returns the previous selection so that it can be reused
org.eclipse.jface.viewers.IStructuredSelection	getLastSelection() The last structured selection seen (e.g. selection of a file, folder, or project within the Project Explorer)
void	selectionChanged(org.eclipse.ui.IWorkbenchPart part, org.eclipse.jface.viewers.ISelection selection) Implemented for SelectionListener interface: Listen for selection changes and cache the ones that might be interesting to us.
static void	setLastHandledAnalysis(RunAnalyseHandler handler, org.eclipse.jface.viewers.IStructuredSelection selection) Remember what was last executed, so that we can give a repeat performance

Methods inherited from class org.eclipse.core.commands.AbstractHandler

addHandlerListener, dispose, fireHandlerChanged, hasListeners, isEnabled, isHandled, removeHandlerListener, setBaseEnabled, setEnabled

Methods inherited from class org.eclipse.core.commands.common.EventManager

addListenerObject, clearListeners, getListeners, isListenerAttached, removeListenerObject

Methods inherited from class java.lang.Object

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

Field Detail

lastAnalysisHandler

protected static RunAnalyseHandler lastAnalysisHandler

lastAnalysisSelection

protected static org.eclipse.jface.viewers.IStructuredSelection lastAnalysisSelection

lastSelection

protected org.eclipse.jface.viewers.IStructuredSelection lastSelection

instance

protected static AnalysisDropdownHandler instance

Constructor Detail

AnalysisDropdownHandler

public AnalysisDropdownHandler()

Constructor: set singleton instance, and set up selection listener to listen for selections so we can report them more efficiently than relying on HandlerUtil.getCurrentSelection(); if the current selection isn't a structured selection (e.g. editor selection or something we don't care about) then we want the last structured selection. If we can't find a structured selection at the time this ctor is called, go get the selection in the Project Explorer; it's probably what we want (for the case when an editor has just been opened by double-clicking on its entry in the project explorer: it's still selected in the Proj explorer, but the editor now has the focus).

Method Detail

execute

public java.lang.Object execute(org.eclipse.core.commands.ExecutionEvent event)
                         throws org.eclipse.core.commands.ExecutionException

Specified by:

execute in interface org.eclipse.core.commands.IHandler

Throws:

org.eclipse.core.commands.ExecutionException

setLastHandledAnalysis

public static void setLastHandledAnalysis(RunAnalyseHandler handler,
                                          org.eclipse.jface.viewers.IStructuredSelection selection)

Remember what was last executed, so that we can give a repeat performance

Parameters:

handler -

selection - - cache the selection too; this will be used as a last resort if another analysis doesn't see a recent selection it likes.

getLastAnalysisSelection

public static org.eclipse.jface.viewers.IStructuredSelection getLastAnalysisSelection()

For repeat analysis (clicking on the icon in the toolbar) returns the previous selection so that it can be reused

Returns:

selectionChanged

public void selectionChanged(org.eclipse.ui.IWorkbenchPart part,
                             org.eclipse.jface.viewers.ISelection selection)

Implemented for SelectionListener interface: Listen for selection changes and cache the ones that might be interesting to us.

Specified by:

selectionChanged in interface org.eclipse.ui.ISelectionListener

getLastSelection

public org.eclipse.jface.viewers.IStructuredSelection getLastSelection()

The last structured selection seen (e.g. selection of a file, folder, or project within the Project Explorer)

Returns:

getInstance

public static AnalysisDropdownHandler getInstance()

Get the singleton instance of this class, probably for accessing its knowledge about the current/last selection of interest.

Returns: