Class WorkbenchAdvisor


  • public abstract class WorkbenchAdvisor
    extends Object
    Public base class for configuring the workbench.

    Note that the workbench advisor object is created in advance of creating the workbench. However, by the time the workbench starts calling methods on this class, PlatformUI.getWorkbench is guaranteed to have been properly initialized.

    Example of creating and running a workbench (in an IPlatformRunnable):

     
               public class MyApplication implements IPlatformRunnable {
                 public Object run(Object args) {
                   WorkbenchAdvisor workbenchAdvisor = new MyWorkbenchAdvisor();
                   Display display = PlatformUI.createDisplay();
                   int returnCode = PlatformUI.createAndRunWorkbench(display, workbenchAdvisor);
                   if (returnCode == PlatformUI.RETURN_RESTART) {
                      return IPlatformRunnable.EXIT_RESTART;
                   } else {
                      return IPlatformRunnable.EXIT_OK;
                 }
               }
     
     

    An application should declare a subclass of WorkbenchAdvisor and override methods to configure the workbench to suit the needs of the particular application.

    The following advisor methods are called at strategic points in the workbench's lifecycle (all occur within the dynamic scope of the call to PlatformUI.createAndRunWorkbench):

    • initialize - called first; before any windows; use to register things
    • preStartup - called second; after initialize but before first window is opened; use to temporarily disable things during startup or restore
    • postStartup - called third; after first window is opened; use to reenable things temporarily disabled in previous step
    • postRestore - called after the workbench and its windows has been recreated from a previously saved state; use to adjust the restored workbench
    • preWindowOpen - called as each window is being opened; use to configure aspects of the window other than actions bars
    • fillActionBars - called after preWindowOpen to configure a window's action bars
    • postWindowRestore - called after a window has been recreated from a previously saved state; use to adjust the restored window
    • postWindowCreate - called after a window has been created, either from an initial state or from a restored state; used to adjust the window
    • openIntro - called immediately before a window is opened in order to create the introduction component, if any.
    • postWindowOpen - called after a window has been opened; use to hook window listeners, etc.
    • preWindowShellClose - called when a window's shell is closed by the user; use to pre-screen window closings
    • eventLoopException - called to handle the case where the event loop has crashed; use to inform the user that things are not well
    • eventLoopIdle - called when there are currently no more events to be processed; use to perform other work or to yield until new events enter the queue
    • preShutdown - called immediately prior to workbench shutdown before any windows have been closed; allows the advisor to veto the shutdown
    • postShutdown - called last; after event loop has terminated and all windows have been closed; use to deregister things registered during initialize
    Since:
    3.0
    • Constructor Detail

      • WorkbenchAdvisor

        protected WorkbenchAdvisor()
        Creates and initializes a new workbench advisor instance.
    • Method Detail

      • internalBasicInitialize

        public final void internalBasicInitialize​(IWorkbenchConfigurer configurer)
        Remembers the configurer and calls initialize.

        For internal use by the workbench only.

        Parameters:
        configurer - an object for configuring the workbench
      • initialize

        public void initialize​(IWorkbenchConfigurer configurer)
        Performs arbitrary initialization before the workbench starts running.

        This method is called during workbench initialization prior to any windows being opened. Clients must not call this method directly (although super calls are okay). The default implementation does nothing. Subclasses may override. Typical clients will use the configurer passed in to tweak the workbench. If further tweaking is required in the future, the configurer may be obtained using getWorkbenchConfigurer.

        Parameters:
        configurer - an object for configuring the workbench
      • getWorkbenchConfigurer

        protected IWorkbenchConfigurer getWorkbenchConfigurer()
        Returns the workbench configurer for the advisor. Can be null if the advisor is not initialized yet.
        Returns:
        the workbench configurer, or null if the advisor is not initialized yet
      • getWorkbenchErrorHandler

        public AbstractStatusHandler getWorkbenchErrorHandler()
        Returns the workbench error handler for the advisor.
        Returns:
        the workbench error handler
        Since:
        3.3
      • preStartup

        public void preStartup()
        Performs arbitrary actions just before the first workbench window is opened (or restored).

        This method is called after the workbench has been initialized and just before the first window is about to be opened. Clients must not call this method directly (although super calls are okay). The default implementation does nothing. Subclasses may override.

      • postStartup

        public void postStartup()
        Performs arbitrary actions after the workbench windows have been opened (or restored), but before the main event loop is run.

        This method is called just after the windows have been opened. Clients must not call this method directly (although super calls are okay). The default implementation does nothing. Subclasses may override. It is okay to call IWorkbench.close() from this method.

      • preShutdown

        public boolean preShutdown()
        Performs arbitrary finalization before the workbench is about to shut down.

        This method is called immediately prior to workbench shutdown before any windows have been closed. Clients must not call this method directly (although super calls are okay). The default implementation returns true. Subclasses may override.

        The advisor may veto a regular shutdown by returning false, although this will be ignored if the workbench is being forced to shut down.

        Returns:
        true to allow the workbench to proceed with shutdown, false to veto a non-forced shutdown
      • postShutdown

        public void postShutdown()
        Performs arbitrary finalization after the workbench stops running.

        This method is called during workbench shutdown after all windows have been closed. Clients must not call this method directly (although super calls are okay). The default implementation does nothing. Subclasses may override.

      • eventLoopException

        public void eventLoopException​(Throwable exception)
        Performs arbitrary actions when the event loop crashes (the code that handles a UI event throws an exception that is not caught).

        This method is called when the code handling a UI event throws an exception. In a perfectly functioning application, this method would never be called. In practice, it comes into play when there are bugs in the code that trigger unchecked runtime exceptions. It is also activated when the system runs short of memory, etc. Fatal errors (ThreadDeath) are not passed on to this method, as there is nothing that could be done.

        Clients must not call this method directly (although super calls are okay). The default implementation logs the problem so that it does not go unnoticed. Subclasses may override or extend this method. It is generally a bad idea to override with an empty method, and you should be especially careful when handling Errors.

        Parameters:
        exception - the uncaught exception that was thrown inside the UI event loop
      • eventLoopIdle

        public void eventLoopIdle​(Display display)
        Performs arbitrary work or yields when there are no events to be processed.

        This method is called when there are currently no more events on the queue to be processed at the moment.

        Clients must not call this method directly (although super calls are okay). The default implementation yields until new events enter the queue. Subclasses may override or extend this method. It is generally a bad idea to override with an empty method. It is okay to call IWorkbench.close() from this method.

        Parameters:
        display - the main display of the workbench UI
      • createWorkbenchWindowAdvisor

        public WorkbenchWindowAdvisor createWorkbenchWindowAdvisor​(IWorkbenchWindowConfigurer configurer)
        Creates a new workbench window advisor for configuring a new workbench window via the given workbench window configurer. Clients should override to provide their own window configurer. This method replaces all the other window and action bar lifecycle methods on the workbench advisor.

        The default implementation creates a window advisor that calls back to the legacy window and action bar lifecycle methods on the workbench advisor, for backwards compatibility with 3.0.

        Parameters:
        configurer - the workbench window configurer
        Returns:
        a new workbench window advisor
        Since:
        3.1
      • preWindowOpen

        @Deprecated
        public void preWindowOpen​(IWorkbenchWindowConfigurer configurer)
        Deprecated.
        since 3.1, override WorkbenchWindowAdvisor.preWindowOpen() instead
        Performs arbitrary actions before the given workbench window is opened.

        This method is called before the window's controls have been created. Clients must not call this method directly (although super calls are okay). The default implementation does nothing. Subclasses may override. Typical clients will use the configurer passed in to tweak the workbench window in an application-specific way; however, filling the window's menu bar, tool bar, and status line must be done in fillActionBars, which is called immediately after this method is called.

        Parameters:
        configurer - an object for configuring the particular workbench window being opened
        See Also:
        createWorkbenchWindowAdvisor(IWorkbenchWindowConfigurer)
      • fillActionBars

        @Deprecated
        public void fillActionBars​(IWorkbenchWindow window,
                                   IActionBarConfigurer configurer,
                                   int flags)
        Deprecated.
        since 3.1, override ActionBarAdvisor.fillActionBars(int) instead
        Configures the action bars using the given action bar configurer. Under normal circumstances, flags does not include FILL_PROXY, meaning this is a request to fill the actions\ bars of the given workbench window; the remaining flags indicate which combination of the menu bar (FILL_MENU_BAR), the tool bar (FILL_COOL_BAR), and the status line (FILL_STATUS_LINE) are to be filled.

        If flags does include FILL_PROXY, then this is a request to describe the actions bars of the given workbench window (which will already have been filled); again, the remaining flags indicate which combination of the menu bar, the tool bar, and the status line are to be described. The actions included in the proxy action bars can be the same instances as in the actual window's action bars. Calling ActionFactory to create new action instances is not recommended, because these actions internally register listeners with the window and there is no opportunity to dispose of these actions.

        This method is called just after preWindowOpen. Clients must not call this method directly (although super calls are okay). The default implementation does nothing. Subclasses may override.

        Parameters:
        window - the workbench window
        configurer - the action bar configurer object
        flags - bit mask composed from the constants FILL_MENU_BAR, FILL_COOL_BAR, FILL_STATUS_LINE, and FILL_PROXY Note: should 1st param be IWorkbenchWindowConfigurer to be more consistent with other methods? Note: suggest adding ActionBuilder as API, to encapsulate the action building outside of the advisor, and to handle the common pattern of hanging onto the action builder in order to properly handle FILL_PROXY
        See Also:
        createWorkbenchWindowAdvisor(IWorkbenchWindowConfigurer), WorkbenchWindowAdvisor.createActionBarAdvisor(IActionBarConfigurer)
      • postWindowRestore

        @Deprecated
        public void postWindowRestore​(IWorkbenchWindowConfigurer configurer)
                               throws WorkbenchException
        Deprecated.
        since 3.1, override WorkbenchWindowAdvisor.postWindowRestore() instead
        Performs arbitrary actions after the given workbench window has been restored, but before it is opened.

        This method is called after a previously-saved window have been recreated. This method is not called when a new window is created from scratch. This method is never called when a workbench is started for the very first time, or when workbench state is not saved or restored. Clients must not call this method directly (although super calls are okay). The default implementation does nothing. Subclasses may override. It is okay to call IWorkbench.close() from this method.

        Parameters:
        configurer - an object for configuring the particular workbench window just restored
        Throws:
        WorkbenchException
        See Also:
        createWorkbenchWindowAdvisor(IWorkbenchWindowConfigurer)
      • openIntro

        @Deprecated
        public void openIntro​(IWorkbenchWindowConfigurer configurer)
        Deprecated.
        since 3.1, override WorkbenchWindowAdvisor.openIntro() instead
        Opens the introduction componenet.

        Clients must not call this method directly (although super calls are okay). The default implementation opens the intro in the first window provided the preference IWorkbenchPreferences.SHOW_INTRO is true. If an intro is shown then this preference will be set to false. Subsequently, and intro will be shown only if WorkbenchConfigurer.getSaveAndRestore() returns true and the introduction was visible on last shutdown. Subclasses may override.

        Parameters:
        configurer - configurer an object for configuring the particular workbench window just created
        See Also:
        createWorkbenchWindowAdvisor(IWorkbenchWindowConfigurer)
      • postWindowCreate

        @Deprecated
        public void postWindowCreate​(IWorkbenchWindowConfigurer configurer)
        Deprecated.
        since 3.1, override WorkbenchWindowAdvisor.postWindowCreate() instead
        Performs arbitrary actions after the given workbench window has been created (possibly after being restored), but has not yet been opened.

        This method is called after a new window has been created from scratch, or when a previously-saved window has been restored. In the latter case, this method is called after postWindowRestore. Clients must not call this method directly (although super calls are okay). The default implementation does nothing. Subclasses may override.

        Parameters:
        configurer - an object for configuring the particular workbench window just created
        See Also:
        createWorkbenchWindowAdvisor(IWorkbenchWindowConfigurer)
      • postWindowOpen

        @Deprecated
        public void postWindowOpen​(IWorkbenchWindowConfigurer configurer)
        Deprecated.
        since 3.1, override WorkbenchWindowAdvisor.postWindowOpen() instead
        Performs arbitrary actions after the given workbench window has been opened (possibly after being restored).

        This method is called after a window has been opened. This method is called after a new window has been created from scratch, or when a previously-saved window has been restored. Clients must not call this method directly (although super calls are okay). The default implementation does nothing. Subclasses may override.

        Parameters:
        configurer - an object for configuring the particular workbench window just opened
        See Also:
        createWorkbenchWindowAdvisor(IWorkbenchWindowConfigurer)
      • preWindowShellClose

        @Deprecated
        public boolean preWindowShellClose​(IWorkbenchWindowConfigurer configurer)
        Deprecated.
        Performs arbitrary actions as the given workbench window's shell is being closed directly, and possibly veto the close.

        This method is called from a ShellListener associated with the workbench window. It is not called when the window is being closed for other reasons. Clients must not call this method directly (although super calls are okay). The default implementation does nothing. Subclasses may override. Typical clients may use the configurer passed in to access the workbench window being closed. If this method returns false, then the user's request to close the shell is ignored. This gives the workbench advisor an opportunity to query the user and/or veto the closing of a window under some circumstances.

        Parameters:
        configurer - an object for configuring the particular workbench window whose shell is being closed
        Returns:
        true to allow the window to close, and false to prevent the window from closing
        See Also:
        IWorkbenchWindow.close(), createWorkbenchWindowAdvisor(IWorkbenchWindowConfigurer)
      • postWindowClose

        @Deprecated
        public void postWindowClose​(IWorkbenchWindowConfigurer configurer)
        Deprecated.
        since 3.1, override WorkbenchWindowAdvisor.postWindowClose() instead
        Performs arbitrary actions after the given workbench window is closed.

        This method is called after the window's controls have been disposed. Clients must not call this method directly (although super calls are okay). The default implementation does nothing. Subclasses may override. Typical clients will use the configurer passed in to tweak the workbench window in an application-specific way.

        Parameters:
        configurer - an object for configuring the particular workbench window being closed
        See Also:
        createWorkbenchWindowAdvisor(IWorkbenchWindowConfigurer)
      • getDefaultPageInput

        public IAdaptable getDefaultPageInput()
        Returns the default input for newly created workbench pages when the input is not explicitly specified.

        The default implementation returns null. Subclasses may override.

        Returns:
        the default input for a new workbench window page, or null if none
        See Also:
        createWorkbenchWindowAdvisor(IWorkbenchWindowConfigurer)
      • getInitialWindowPerspectiveId

        public abstract String getInitialWindowPerspectiveId()
        Returns the id of the perspective to use for the initial workbench window, or null if no initial perspective should be shown in the initial workbench window.

        This method is called during startup when the workbench is creating the first new window. Subclasses must implement.

        If the IWorkbenchPreferenceConstants.DEFAULT_PERSPECTIVE_ID preference is specified, it supercedes the perspective specified here.

        Returns:
        the id of the perspective for the initial window, or null if no initial perspective should be shown
      • getMainPreferencePageId

        public String getMainPreferencePageId()
        Returns the id of the preference page that should be presented most prominently.

        The default implementation returns null. Subclasses may override.

        Returns:
        the id of the preference page, or null if none
      • openWindows

        public boolean openWindows()
        Opens the workbench windows on startup. The default implementation tries to restore the previously saved workbench state using IWorkbenchConfigurer.restoreWorkbenchState(). If there was no previously saved state, or if the restore failed, then a first-time window is opened using IWorkbenchConfigurer.openFirstTimeWindow.
        Returns:
        true to proceed with workbench startup, or false to exit
      • saveState

        public IStatus saveState​(IMemento memento)
        Saves arbitrary application-specific state information for this workbench advisor.

        The default implementation simply returns an OK status. Subclasses may extend or override.

        Parameters:
        memento - the memento in which to save the advisor's state
        Returns:
        a status object indicating whether the save was successful
        Since:
        3.1
      • restoreState

        public IStatus restoreState​(IMemento memento)
        Restores arbitrary application-specific state information for this workbench advisor.

        The default implementation simply returns an OK status. Subclasses may extend or override.

        Parameters:
        memento - the memento from which to restore the advisor's state
        Returns:
        a status object indicating whether the restore was successful
        Since:
        3.1
      • getComparatorFor

        public ContributionComparator getComparatorFor​(String contributionType)
        Return the contribution comparator for the particular type of contribution. The default implementation of this class returns a comparator that sorts the items by label. The contributionType may be one of the constants in IContributionService or it can be a value defined by the user.
        Parameters:
        contributionType - the contribution type
        Returns:
        the comparator, must not return null
        Since:
        3.4
        See Also:
        IContributionService.getComparatorFor(String)