Package org.eclipse.compare

Class CompareEditorInput

  • All Implemented Interfaces:
    ICompareContainer, IPropertyChangeNotifier, IAdaptable, IRunnableContext, IRunnableWithProgress, IEditorInput
    Direct Known Subclasses:
    PageCompareEditorInput, SaveableCompareEditorInput
    public abstract class CompareEditorInput
extends PlatformObject
implements IEditorInput, IPropertyChangeNotifier, IRunnableWithProgress, ICompareContainer
    A compare operation which can present its results in a special editor. Running the compare operation and presenting the results in a compare editor are combined in one class because it allows a client to keep the implementation all in one place while separating it from the innards of a specific UI implementation of compare/merge.

    A CompareEditorInput defines methods for the following sequence steps:

    • running a lengthy compare operation under progress monitor control,
    • creating a UI for displaying the model and initializing the some widgets with the compare result,
    • tracking the dirty state of the model in case of merge,
    • saving the model.
    The Compare plug-in's openCompareEditor method takes an CompareEditorInput and starts sequencing through the above steps. If the compare result is not empty a new compare editor is opened and takes over the sequence until eventually closed.

    The prepareInput method should contain the code of the compare operation. It is executed under control of a progress monitor and can be canceled. If the result of the compare is not empty, that is if there are differences that needs to be presented, the ICompareInput should hold onto them and return them with the getCompareResult method. If the value returned from getCompareResult is not null a compare editor is opened on the ICompareInput with title and title image initialized by the corresponding methods of the ICompareInput.

    Creation of the editor's SWT controls is delegated to the createContents method. Here the SWT controls must be created and initialized with the result of the compare operation.

    If merging is allowed, the modification state of the compared constituents must be tracked and the dirty state returned from method isSaveNeeded. The value true triggers a subsequent call to save where the modified resources can be saved.

    The most important part of this implementation is the setup of the compare/merge UI. The UI uses a simple browser metaphor to present compare results. The top half of the layout shows the structural compare results (e.g. added, deleted, and changed files), the bottom half the content compare results (e.g. textual differences between two files). A selection in the top pane is fed to the bottom pane. If a content viewer is registered for the type of the selected object, this viewer is installed in the pane. In addition if a structure viewer is registered for the selection type the top pane is split vertically to make room for another pane and the structure viewer is installed in it. When comparing Java files this second structure viewer would show the structural differences within a Java file, e.g. added, deleted or changed methods and fields.

    Subclasses provide custom setups, e.g. for a Catch-up/Release operation by passing a subclass of CompareConfiguration and by implementing the prepareInput method. If a subclass cannot use the DiffTreeViewer which is installed by default in the top left pane, method createDiffViewer can be overridden.

    If subclasses of this class implement ISaveablesSource, the compare editor will pass these models through to the workbench. The editor will still show the dirty indicator if one of these underlying models is dirty. It is the responsibility of subclasses that implement this interface to call setDirty(boolean) when the dirty state of any of the models managed by the subclass change dirty state.

    See Also:
    CompareUI, CompareEditorInput

    • Field Detail

      • DIRTY_STATE

        public static final String DIRTY_STATE
        The name of the "dirty" property (value "DIRTY_STATE").
        See Also:
        Constant Field Values

      • PROP_TITLE

        public static final String PROP_TITLE
        The name of the "title" property. This property is fired when the title of the compare input changes. Clients should also re-obtain the tool tip when this property changes.
        Since:
        3.3
        See Also:
        getTitle()

      • PROP_TITLE_IMAGE

        public static final String PROP_TITLE_IMAGE
        The name of the "title image" property. This property is fired when the title image of the compare input changes.
        Since:
        3.3
        See Also:
        getTitleImage()

      • PROP_SELECTED_EDITION

        public static final String PROP_SELECTED_EDITION
        The name of the "selected edition" property. This property is fired when the selected edition of the compare input changes.
        Since:
        3.3
        See Also:
        isEditionSelectionDialog(), getSelectedEdition()

    • Constructor Detail

      • CompareEditorInput

        public CompareEditorInput​(CompareConfiguration configuration)
        Creates a CompareEditorInput which is initialized with the given compare configuration. The compare configuration is passed to subsequently created viewers.
        Parameters:
        configuration - the compare configuration

    • Method Detail

      • getAdapter

        public <T> T getAdapter​(Class<T> adapter)
        Description copied from class: PlatformObject
        Returns an object which is an instance of the given class associated with this object. Returns null if no such object can be found.

        This implementation of the method declared by IAdaptable passes the request along to the platform's adapter manager; roughly Platform.getAdapterManager().getAdapter(this, adapter). Subclasses may override this method (however, if they do so, they should invoke the method on their superclass to ensure that the Platform's adapter manager is consulted).

        Specified by:
        getAdapter in interface IAdaptable
        Overrides:
        getAdapter in class PlatformObject
        Type Parameters:
        T - the class type
        Parameters:
        adapter - the class to adapt to
        Returns:
        the adapted object or null
        See Also:
        IAdaptable.getAdapter(Class)

      • getImageDescriptor

        public ImageDescriptor getImageDescriptor()
        Description copied from interface: IEditorInput
        Returns the image descriptor for this input.

        Note: although a null return value has never been permitted from this method, there are many known buggy implementations that return null. Clients that need the image for an editor are advised to use IWorkbenchPart.getImage() instead of IEditorInput.getImageDescriptor(), or to recover from a null return value in a manner that records the ID of the problematic editor input. Implementors that have been returning null from this method should pick some other default return value (such as ImageDescriptor.getMissingImageDescriptor()).

        Specified by:
        getImageDescriptor in interface IEditorInput
        Returns:
        the image descriptor for this input; may be null if there is no image.

      • getToolTipText

        public String getToolTipText()
        Description copied from interface: IEditorInput
        Returns the tool tip text for this editor input. This text is used to differentiate between two input with the same name. For instance, MyClass.java in folder X and MyClass.java in folder Y. The format of the text varies between input types.
        Specified by:
        getToolTipText in interface IEditorInput
        Returns:
        the tool tip text; never null.

      • getName

        public String getName()
        Description copied from interface: IEditorInput
        Returns the name of this editor input for display purposes.

        For instance, when the input is from a file, the return value would ordinarily be just the file name.

        Specified by:
        getName in interface IEditorInput
        Returns:
        the name string; never null;

      • getPersistable

        public IPersistableElement getPersistable()
        Returns null since this editor cannot be persisted.
        Specified by:
        getPersistable in interface IEditorInput
        Returns:
        null because this editor cannot be persisted

      • exists

        public boolean exists()
        Returns false to indicate that this input should not appear in the "File Most Recently Used" menu.
        Specified by:
        exists in interface IEditorInput
        Returns:
        false

      • setMessage

        protected void setMessage​(String message)

      • getMessage

        public String getMessage()

      • getTitle

        public String getTitle()
        Returns the title which will be used in the compare editor's title bar. It can be set with setTitle.
        Returns:
        the title

      • setTitle

        public void setTitle​(String title)
        Sets the title which will be used when presenting the compare result. This method must be called before the editor is opened.
        Parameters:
        title - the title to use for the CompareEditor

      • getTitleImage

        public Image getTitleImage()
        Returns the title image which will be used in the compare editor's title bar. Returns the title image which will be used when presenting the compare result. This implementation returns a generic compare icon. Subclasses can override.
        Returns:
        the title image, or null if none

      • getCompareConfiguration

        public CompareConfiguration getCompareConfiguration()
        Returns the configuration object for the viewers within the compare editor. Returns the configuration which was passed to the constructor.
        Returns:
        the compare configuration

      • contributeToToolBar

        public void contributeToToolBar​(ToolBarManager toolBarManager)
        Adds standard actions to the given ToolBarManager.

        Subclasses may override to add their own actions.

        Parameters:
        toolBarManager - the ToolBarManager to which to contribute

      • prepareInput

        protected abstract Object prepareInput​(IProgressMonitor monitor)
                                throws InvocationTargetException,
                                       InterruptedException
        Runs the compare operation and returns the compare result. If null is returned no differences were found and no compare editor needs to be opened. Progress should be reported to the given progress monitor. A request to cancel the operation should be honored and acknowledged by throwing InterruptedException.

        Note: this method is typically called in a modal context thread which doesn't have a Display assigned. Implementors of this method shouldn't therefore allocated any SWT resources in this method.

        Parameters:
        monitor - the progress monitor to use to display progress and receive requests for cancellation
        Returns:
        the result of the compare operation, or null if there are no differences
        Throws:
        InvocationTargetException - if the prepareInput method must propagate a checked exception, it should wrap it inside an InvocationTargetException; runtime exceptions are automatically wrapped in an InvocationTargetException by the calling context
        InterruptedException - if the operation detects a request to cancel, using IProgressMonitor.isCanceled(), it should exit by throwing InterruptedException

      • getCompareResult

        public Object getCompareResult()
        Returns the compare result computed by the most recent call to the run method. Returns null if no differences were found.
        Returns:
        the compare result prepared in method prepareInput or null if there were no differences

      • createContents

        public Control createContents​(Composite parent)
        Creates the SWT controls that are used to display the result of the compare operation. Creates the SWT Controls and sets up the wiring between the individual panes. This implementation creates all four panes but makes only the necessary ones visible. Finally it feeds the compare result into the top left structure viewer and the content viewer.

        Subclasses may override if they need to change the layout or wiring between panes.

        Parameters:
        parent - the parent control under which the control must be created
        Returns:
        the SWT control hierarchy for the compare editor

      • createContentViewerSwitchingPane

        protected CompareViewerSwitchingPane createContentViewerSwitchingPane​(Splitter parent,
                                                                      int style,
                                                                      CompareEditorInput cei)
        Parameters:
        parent - the parent control under which the control must be created
        style - the style of widget to construct
        cei - the compare editor input for the viewer
        Returns:
        the pane displaying content changes
        Restriction:
        This method is not intended to be referenced by clients.
        Restriction:
        This method is not intended to be re-implemented or extended by clients.

      • handleDispose

        protected void handleDispose()
        Callback that occurs when the UI associated with this compare editor input is disposed. This method will only be invoked if the UI has been created (i.e. after the call to createContents(Composite). Subclasses can extend this method but ensure that the overridden method is invoked.
        Since:
        3.3

      • contentsCreated

        protected void contentsCreated()
        Callback that occurs after the control for the input has been created. If this method gets invoked then handleDispose() will be invoked when the control is disposed. Subclasses may extend this method to register any listeners that need to be de-registered when the input is disposed.
        Since:
        3.3

      • createOutlineContents

        public Control createOutlineContents​(Composite parent,
                                     int direction)
        Parameters:
        parent - the parent control under which the control must be created
        direction - the layout direction of the contents, either SWT.HORIZONTAL or SWT.VERTICAL
        Returns:
        the SWT control hierarchy for the outline part of the compare editor
        Since:
        3.0

      • createStructureInputPane

        protected CompareViewerPane createStructureInputPane​(Composite parent)
        Create the pane that will contain the structure input pane (upper left). By default, a CompareViewerSwitchingPane is returned. Subclasses may override to provide an alternate pane.
        Parameters:
        parent - the parent composite
        Returns:
        the structure input pane
        Since:
        3.3

      • setFocus

        @Deprecated
public void setFocus()
        Deprecated.
        Please use setFocus2() instead.
        Asks this input to take focus within its container (editor).
        Restriction:
        Clients should not call this method but they may override if they implement a different layout with different visual components. Clients are free to call the inherited method.

      • setFocus2

        public boolean setFocus2()
        Asks this input to take focus within its container (editor).
        Returns:
        true if the input got focus, and false if it was unable to.
        Since:
        3.5
        Restriction:
        Clients should not call this method but they may override if they implement a different layout with different visual components. Clients are free to call the inherited method.

      • createDiffViewer

        public Viewer createDiffViewer​(Composite parent)
        Factory method for creating a differences viewer for the top left pane. It is called from createContents and returns a DiffTreeViewer.

        Subclasses may override if they need a different viewer.

        Parameters:
        parent - the SWT parent control under which to create the viewer's SWT controls
        Returns:
        a compare viewer for the top left pane

      • findStructureViewer

        public Viewer findStructureViewer​(Viewer oldViewer,
                                  ICompareInput input,
                                  Composite parent)
        Implements the dynamic viewer switching for structure viewers. The method must return a compare viewer based on the old (or current) viewer and a new input object. If the old viewer is suitable for showing the new input the old viewer can be returned. Otherwise a new viewer must be created under the given parent composite or null can be returned to indicate that no viewer could be found.

        This implementation forwards the request to CompareUI.findStructureViewer.

        Subclasses may override to implement a different strategy.

        Parameters:
        oldViewer - a new viewer is only created if this old viewer cannot show the given input
        input - the input object for which to find a structure viewer
        parent - the SWT parent composite under which the new viewer is created
        Returns:
        a compare viewer which is suitable for the given input object or null

      • findContentViewer

        public Viewer findContentViewer​(Viewer oldViewer,
                                ICompareInput input,
                                Composite parent)
        Implements the dynamic viewer switching for content viewers. The method must return a compare viewer based on the old (or current) viewer and a new input object. If the old viewer is suitable for showing the new input the old viewer can be returned. Otherwise a new viewer must be created under the given parent composite or null can be returned to indicate that no viewer could be found.

        This implementation forwards the request to CompareUI.findContentViewer.

        Subclasses may override to implement a different strategy.

        Parameters:
        oldViewer - a new viewer is only created if this old viewer cannot show the given input
        input - the input object for which to find a structure viewer
        parent - the SWT parent composite under which the new viewer is created
        Returns:
        a compare viewer which is suitable for the given input object or null

      • setContentViewerDescriptor

        public void setContentViewerDescriptor​(org.eclipse.compare.internal.ViewerDescriptor vd)
        Parameters:
        vd - the content viewer descriptor
        Restriction:
        This method is not intended to be referenced by clients.
        Restriction:
        This method is not intended to be re-implemented or extended by clients.

      • getContentViewerDescriptor

        public org.eclipse.compare.internal.ViewerDescriptor getContentViewerDescriptor()
        Returns:
        the content viewer descriptor set for the input
        Restriction:
        This method is not intended to be referenced by clients.
        Restriction:
        This method is not intended to be re-implemented or extended by clients.

      • setStructureViewerDescriptor

        public void setStructureViewerDescriptor​(org.eclipse.compare.internal.ViewerDescriptor vd)
        Parameters:
        vd - the structure viewer descriptor
        Restriction:
        This method is not intended to be referenced by clients.
        Restriction:
        This method is not intended to be re-implemented or extended by clients.

      • getStructureViewerDescriptor

        public org.eclipse.compare.internal.ViewerDescriptor getStructureViewerDescriptor()
        Returns:
        the structure viewer descriptor set for the input
        Restriction:
        This method is not intended to be referenced by clients.
        Restriction:
        This method is not intended to be re-implemented or extended by clients.

      • isSaveNeeded

        public boolean isSaveNeeded()
        Returns true if there are unsaved changes in either left or right side. The value returned is the value of the DIRTY_STATE property of this input object. Returns true if left or right side has unsaved changes Subclasses don't have to override if the functionality provided by setDirty is sufficient.
        Returns:
        true if there are changes that need to be saved

      • isLeftSaveNeeded

        protected boolean isLeftSaveNeeded()
        Returns true if there are unsaved changes for left side.
        Returns:
        true if there are changes that need to be saved
        Restriction:
        This method is not intended to be referenced by clients.

      • isRightSaveNeeded

        protected boolean isRightSaveNeeded()
        Returns true if there are unsaved changes for right side.
        Returns:
        true if there are changes that need to be saved
        Restriction:
        This method is not intended to be referenced by clients.

      • isDirty

        public boolean isDirty()
        Returns true if there are unsaved changes. The method should be called by any parts or dialogs that contain the input. By default, this method calls isSaveNeeded() but subclasses may extend.
        Returns:
        true if there are unsaved changes
        Since:
        3.3

      • setDirty

        public void setDirty​(boolean dirty)
        Sets the dirty state of this input to the given value and sends out a PropertyChangeEvent if the new value differs from the old value. Direct calling this method with parameter dirty equal to false when there are unsaved changes in viewers, results in inconsistent state. The dirty state of compare input should be based only on the information if there are changes in viewers for left or right side.
        Parameters:
        dirty - the dirty state for this compare input

      • setLeftDirty

        protected void setLeftDirty​(boolean dirty)
        Sets the dirty state of left site of this input to the given value and sends out a PropertyChangeEvent if the new value for whole input differs from the old value. Direct calling this method with parameter dirty equal to false when there are unsaved changes in left viewer, results in inconsistent state. The dirty state of compare input should be based only on the information if there are changes in viewers for left side.
        Parameters:
        dirty - the dirty state for this compare input
        Since:
        3.7
        Restriction:
        This method is not intended to be referenced by clients.
        Restriction:
        This method is not intended to be re-implemented or extended by clients.

      • setRightDirty

        protected void setRightDirty​(boolean dirty)
        Sets the dirty state of right site of this input to the given value and sends out a PropertyChangeEvent if the new value for whole input differs from the old value. Direct calling this method with parameter dirty equal to false when there are unsaved changes in right viewer, results in inconsistent state. The dirty state of compare input should be based only on the information if there are changes in viewers for right side.
        Parameters:
        dirty - the dirty state for this compare input
        Since:
        3.7
        Restriction:
        This method is not intended to be referenced by clients.
        Restriction:
        This method is not intended to be re-implemented or extended by clients.

      • save

        @Deprecated
public void save​(IProgressMonitor pm)
        Deprecated.
        Override method saveChanges instead.
        Saves any unsaved changes. Empty implementation. Subclasses must override to save any changes.
        Parameters:
        pm - an IProgressMonitor that the implementation of save may use to show progress

      • saveChanges

        public void saveChanges​(IProgressMonitor monitor)
                 throws CoreException
        Saves any unsaved changes. Subclasses must override to save any changes. This implementation tries to flush changes in all viewers by calling ISavable.save on them.
        Parameters:
        monitor - an IProgressMonitor that the implementation of save may use to show progress
        Throws:
        CoreException - If save fails.
        Since:
        2.0

      • flushViewers

        protected void flushViewers​(IProgressMonitor monitor)
        Flushes the viewer contents into the input.
        Parameters:
        monitor - a progress monitor
        Since:
        3.3

      • flushLeftViewers

        protected void flushLeftViewers​(IProgressMonitor monitor)
        Parameters:
        monitor - a progress monitor
        Restriction:
        This method is not intended to be referenced by clients.

      • flushRightViewers

        protected void flushRightViewers​(IProgressMonitor monitor)
        Parameters:
        monitor - a progress monitor
        Restriction:
        This method is not intended to be referenced by clients.

      • addCompareInputChangeListener

        public void addCompareInputChangeListener​(ICompareInput input,
                                          ICompareInputChangeListener listener)
        Description copied from interface: ICompareContainer
        Register for change events for the given compare input. Although clients can register with the compare input directly, registering through the container allows for deterministic and optimized behavior in some cases. Registering multiple times for the same compare input has no effect.
        Specified by:
        addCompareInputChangeListener in interface ICompareContainer
        Parameters:
        input - the compare input
        listener - the compare input change listener

      • registerContextMenu

        public void registerContextMenu​(MenuManager menu,
                                ISelectionProvider selectionProvider)
        Description copied from interface: ICompareContainer
        Register the content menu with the container to give the container a chance to add additional items to the context menu such as popup menu object contributions. The provided menu should have a IWorkbenchActionConstants.MB_ADDITIONS separator as this is where the container will add actions.
        Specified by:
        registerContextMenu in interface ICompareContainer
        Parameters:
        menu - the menu being registered
        selectionProvider - the selection provider

      • setStatusMessage

        public void setStatusMessage​(String message)
        Description copied from interface: ICompareContainer
        Set the status message displayed by the container to the given message
        Specified by:
        setStatusMessage in interface ICompareContainer
        Parameters:
        message - the status message

      • getActionBars

        public IActionBars getActionBars()
        Description copied from interface: ICompareContainer
        Return the action bars for the container or null if the container does not have an action bars.
        Specified by:
        getActionBars in interface ICompareContainer
        Returns:
        the action bars for the container or null

      • getWorkbenchPart

        public IWorkbenchPart getWorkbenchPart()
        Description copied from interface: ICompareContainer
        Return the workbench part associated with this container or null if there is no part or it is not available.
        Specified by:
        getWorkbenchPart in interface ICompareContainer
        Returns:
        the workbench part associated with this container or null

      • run

        public void run​(boolean fork,
                boolean cancelable,
                IRunnableWithProgress runnable)
         throws InvocationTargetException,
                InterruptedException
        Description copied from interface: IRunnableContext

        Runs the given IRunnableWithProgress in this context. For example, if this is a ProgressMonitorDialog then the runnable is run using this dialog's progress monitor.

        If fork is false, the current thread is used to run the runnable. Note that if fork is true, it is unspecified whether or not this method blocks until the runnable has been run. Implementers should document whether the runnable is run synchronously (blocking) or asynchronously (non-blocking), or if no assumption can be made about the blocking behaviour.

        Specified by:
        run in interface IRunnableContext
        Parameters:
        fork - true if the runnable should be run in a separate thread, and false to run in the same thread
        cancelable - true to enable the cancelation, and false to make the operation uncancellable
        runnable - the runnable to run
        Throws:
        InvocationTargetException - wraps any exception or error which occurs while running the runnable
        InterruptedException - propagated by the context if the runnable acknowledges cancelation by throwing this exception. This should not be thrown if cancelable is false.

      • runAsynchronously

        public void runAsynchronously​(IRunnableWithProgress runnable)
        Description copied from interface: ICompareContainer
        Queue the given task to be run asynchronously. If the given runnable was previously queued to run asynchronously and it has not yet run, the task position will be moved to the end of the queue. If the task that is being queued is currently running, the running task will be canceled and added to the end of the queue.

        This method should be treated as a request to run the given task asynchronously. However, clients should not assume that the code will be run asynchronously. Depending on the container implementation, a call to this method may or may not block the caller until the task is completed. Also, the task may be executed in a modal or non-modal fashion.

        Specified by:
        runAsynchronously in interface ICompareContainer
        Parameters:
        runnable - the task to be performed

      • setContainer

        public void setContainer​(ICompareContainer container)
        Sets the container of this input to the given container
        Parameters:
        container - the container
        Since:
        3.3

      • getContainer

        public final ICompareContainer getContainer()
        Returns the container of this input or null if there is no container set.
        Returns:
        the container of this input or null
        Since:
        3.3

      • firePropertyChange

        protected void firePropertyChange​(PropertyChangeEvent event)
        Fires the given property change event to all listeners registered with this compare editor input.
        Parameters:
        event - the property change event
        Since:
        3.3

      • canRunAsJob

        public boolean canRunAsJob()
        Returns whether this compare editor input can be run as a job. By default, false is returned since traditionally inputs were prepared in the foreground (i.e the UI was blocked when the run(IProgressMonitor) method (and indirectly the prepareInput(IProgressMonitor) method) was invoked. Subclasses may override.
        Returns:
        whether this compare editor input can be run in the background
        Since:
        3.3

      • belongsTo

        public boolean belongsTo​(Object family)
        Returns whether this input belongs to the given family when it is run as a job.
        Parameters:
        family - the job family
        Returns:
        whether this input belongs to the given family
        Since:
        3.3
        See Also:
        canRunAsJob(), Job.belongsTo(Object)

      • isEditionSelectionDialog

        public boolean isEditionSelectionDialog()
        Returns whether this input is intended to be used to select a particular edition of an element in a dialog. The result of this method is only consider if neither sides of the input are editable. By default, false is returned.
        Returns:
        whether this input is intended to be used to select a particular edition of an element in a dialog
        Since:
        3.3
        See Also:
        getOKButtonLabel(), okPressed(), getSelectedEdition()

      • getOKButtonLabel

        public String getOKButtonLabel()
        Returns the label to be used for the OK button when this input is displayed in a dialog. By default, different labels are used depending on whether the input is editable or is for edition selection (see isEditionSelectionDialog().
        Returns:
        the label to be used for the OK button when this input is displayed in a dialog
        Since:
        3.3

      • okPressed

        public boolean okPressed()
        The OK button was pressed in a dialog. If one or both of the sides of the input is editable then any changes will be saved. If the input is for edition selection (see isEditionSelectionDialog()), it is up to subclasses to override this method in order to perform the appropriate operation on the selected edition.
        Returns:
        whether the dialog should be closed or not.
        Since:
        3.3

      • cancelPressed

        public void cancelPressed()
        The CANCEL button was pressed in a dialog. By default, nothing is done. Subclasses may override.
        Since:
        3.3

      • getSelectedEdition

        public Object getSelectedEdition()
        Returns the selected edition or null if no edition is selected. The result of this method should only be considered if isEditionSelectionDialog() returns true.
        Returns:
        the selected edition or null
        Since:
        3.3

      • setHelpContextId

        public void setHelpContextId​(String helpContextId)
        Sets the help context id for this input.
        Parameters:
        helpContextId - the help context id.
        Since:
        3.3