Package javax.help

Class ServletHelpBroker

  • All Implemented Interfaces:
    HelpBroker

    public class ServletHelpBroker
    extends java.lang.Object
    implements HelpBroker
    An implmentation of the HelpBroker interface for Servlets
    • Constructor Summary

      Constructors 
      Constructor Description
      ServletHelpBroker()
      Zero-argument constructor.
    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      void enableHelp​(java.awt.Component comp, java.lang.String id, HelpSet hs)
      Enables help for a Component.
      void enableHelp​(java.awt.MenuItem comp, java.lang.String id, HelpSet hs)
      Enables help for a MenuItem.
      void enableHelpKey​(java.awt.Component comp, java.lang.String id, HelpSet hs)
      Enables the Help key on a Component.
      void enableHelpKey​(java.awt.Component comp, java.lang.String id, HelpSet hs, java.lang.String presentation, java.lang.String presentationName)
      Enables the Help key on a component.
      void enableHelpOnButton​(java.awt.Component comp, java.lang.String id, HelpSet hs)
      Enables help for a Component.
      void enableHelpOnButton​(java.awt.MenuItem comp, java.lang.String id, HelpSet hs)
      Enables help for a MenuItem.
      void enableHelpOnButton​(java.lang.Object obj, java.lang.String id, HelpSet hs, java.lang.String presentation, java.lang.String presentationName)
      Enables help for an object.
      Map.ID getCurrentID()
      Determines which ID is displayed (if any).
      NavigatorView getCurrentNavigatorView()
      Returns the current navigator as a NavigatorView.
      java.net.URL getCurrentURL()
      Determines which URL is displayed.
      java.lang.String getCurrentView()
      Determines the current navigator.
      java.awt.Font getFont()
      Gets the font for this HelpBroker.
      HelpSet getHelpSet()
      Returns the default HelpSet
      java.util.Locale getLocale()
      Gets the locale of this component.
      java.awt.Point getLocation()
      Requests the location of the presentation.
      int getScreen()
      Requests the screen of the presentation.
      java.awt.Dimension getSize()
      Requests the size of the presentation.
      void initPresentation()
      Initializes the presentation.
      boolean isDisplayed()
      Determines if the presentation is displayed.
      boolean isViewDisplayed()
      Determines if the current view is visible.
      void setCurrentID​(java.lang.String id)
      Shows this ID as content relative to the (top) HelpSet for the HelpBroker instance--HelpVisitListeners are notified.
      void setCurrentID​(Map.ID id)
      Displays this ID--HelpVisitListeners are notified.
      void setCurrentURL​(java.net.URL url)
      Displays this URL.
      void setCurrentView​(java.lang.String name)
      Set the currentView to the navigator with the same name as the name parameter.
      void setDisplayed​(boolean b)
      Displays the presentation to the user.
      void setFont​(java.awt.Font f)
      Sets the font for this this HelpBroker.
      void setHelpSet​(HelpSet hs)
      Changes the HelpSet for this broker.
      void setHelpSetPresentation​(HelpSet.Presentation pres)
      Sets the presentation attributes from a HelpSet.Presentation.
      void setLocale​(java.util.Locale l)
      Sets the locale of this HelpBroker.
      void setLocation​(java.awt.Point p)
      Requests the presentation be located at a given position.
      void setScreen​(int screen)
      Requests the presentation be set to a given screen.
      void setSize​(java.awt.Dimension d)
      Requests the presentation be set to a given size.
      void setViewDisplayed​(boolean displayed)
      Hides/Shows view.
      void showID​(java.lang.String id, java.lang.String presentation, java.lang.String presentationName)
      Displays this ID in a particular presentation
      void showID​(Map.ID id, java.lang.String presentation, java.lang.String presentationName)
      Displays this ID in a given presentation
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Field Detail

      • helpset

        protected HelpSet helpset
      • viewDisplayed

        protected boolean viewDisplayed
      • locale

        protected java.util.Locale locale
      • font

        protected java.awt.Font font
    • Constructor Detail

      • ServletHelpBroker

        public ServletHelpBroker()
        Zero-argument constructor. It should be followed by a setHelpSet() invocation.
    • Method Detail

      • getHelpSet

        public HelpSet getHelpSet()
        Returns the default HelpSet
        Specified by:
        getHelpSet in interface HelpBroker
        Returns:
        The HelpSet this JavaHelp is presenting.
      • setHelpSet

        public void setHelpSet​(HelpSet hs)
        Changes the HelpSet for this broker.
        Specified by:
        setHelpSet in interface HelpBroker
        Parameters:
        hs - The HelpSet to set for this broker. A null hs is valid parameter.
      • getLocale

        public java.util.Locale getLocale()
        Gets the locale of this component.
        Specified by:
        getLocale in interface HelpBroker
        Returns:
        This component's locale. If this component does not have a locale, the defaultLocale is returned.
        See Also:
        setLocale(java.util.Locale)
      • setLocale

        public void setLocale​(java.util.Locale l)
        Sets the locale of this HelpBroker. The locale is propagated to the presentation.
        Specified by:
        setLocale in interface HelpBroker
        Parameters:
        l - The locale to become this component's locale. A null locale is the same as the defaultLocale.
        See Also:
        getLocale()
      • getFont

        public java.awt.Font getFont()
        Gets the font for this HelpBroker.
        Specified by:
        getFont in interface HelpBroker
      • setFont

        public void setFont​(java.awt.Font f)
        Sets the font for this this HelpBroker.
        Specified by:
        setFont in interface HelpBroker
        Parameters:
        f - The font.
      • setCurrentView

        public void setCurrentView​(java.lang.String name)
        Set the currentView to the navigator with the same name as the name parameter.
        Specified by:
        setCurrentView in interface HelpBroker
        Parameters:
        name - The name of the navigator to set as the current view. If nav is null or not a valid Navigator in this HelpBroker then an IllegalArgumentException is thrown.
        Throws:
        java.lang.IllegalArgumentException - if nav is null or not a valid Navigator.
      • getCurrentView

        public java.lang.String getCurrentView()
        Determines the current navigator.
        Specified by:
        getCurrentView in interface HelpBroker
        Returns:
        The name of the current navigational view.
      • getCurrentNavigatorView

        public NavigatorView getCurrentNavigatorView()
        Returns the current navigator as a NavigatorView.
      • initPresentation

        public void initPresentation()
        Initializes the presentation. Not implemented in ServletHelpBroker.
        Specified by:
        initPresentation in interface HelpBroker
      • setDisplayed

        public void setDisplayed​(boolean b)
        Displays the presentation to the user.
        Specified by:
        setDisplayed in interface HelpBroker
        Parameters:
        b - Makes the presentation visible or not.
      • isDisplayed

        public boolean isDisplayed()
        Determines if the presentation is displayed.
        Specified by:
        isDisplayed in interface HelpBroker
        Returns:
        Whether the presentation is currently visible.
      • setViewDisplayed

        public void setViewDisplayed​(boolean displayed)
        Hides/Shows view.
        Specified by:
        setViewDisplayed in interface HelpBroker
        Parameters:
        displayed - Make the navigational views visible or not.
      • isViewDisplayed

        public boolean isViewDisplayed()
        Determines if the current view is visible.
        Specified by:
        isViewDisplayed in interface HelpBroker
        Returns:
        Whether the navigational views are visible.
      • setCurrentID

        public void setCurrentID​(java.lang.String id)
                          throws BadIDException
        Shows this ID as content relative to the (top) HelpSet for the HelpBroker instance--HelpVisitListeners are notified.
        Specified by:
        setCurrentID in interface HelpBroker
        Parameters:
        id - A string that identifies the topic to show for the loaded (top) HelpSet
        Throws:
        BadIDException - The ID is not valid for the HelpSet
      • getCurrentID

        public Map.ID getCurrentID()
        Determines which ID is displayed (if any).
        Specified by:
        getCurrentID in interface HelpBroker
        Returns:
        The ID being shown.
      • setCurrentURL

        public void setCurrentURL​(java.net.URL url)
        Displays this URL. HelpVisitListeners are notified. The currentID changes if there is a mathing ID for this URL
        Specified by:
        setCurrentURL in interface HelpBroker
        Parameters:
        url - The url to display. A null URL is a valid url.
      • getCurrentURL

        public java.net.URL getCurrentURL()
        Determines which URL is displayed.
        Specified by:
        getCurrentURL in interface HelpBroker
        Returns:
        The URL being shown.
      • enableHelpKey

        public void enableHelpKey​(java.awt.Component comp,
                                  java.lang.String id,
                                  HelpSet hs)
        Enables the Help key on a Component. Not implemented in ServletHelpBroker
        Specified by:
        enableHelpKey in interface HelpBroker
        Parameters:
        comp - The component to enable the keyboard actions on.
        id - The default HelpID to be displayed.
        hs - The default HelpSet to be displayed.
      • enableHelp

        public void enableHelp​(java.awt.Component comp,
                               java.lang.String id,
                               HelpSet hs)
        Enables help for a Component. Not implemented in ServletHelpBroker
        Specified by:
        enableHelp in interface HelpBroker
        See Also:
        CSH.setHelpID, CSH.setHelpSet
      • enableHelp

        public void enableHelp​(java.awt.MenuItem comp,
                               java.lang.String id,
                               HelpSet hs)
        Enables help for a MenuItem. Not implemented in ServletHelpBroker
        Specified by:
        enableHelp in interface HelpBroker
        See Also:
        CSH.setHelpID, CSH.setHelpSet
      • enableHelpOnButton

        public void enableHelpOnButton​(java.awt.Component comp,
                                       java.lang.String id,
                                       HelpSet hs)
        Enables help for a Component. Not implemented in ServletHelpBroker
        Specified by:
        enableHelpOnButton in interface HelpBroker
        See Also:
        CSH.setHelpID, CSH.setHelpSet, AbstractButton, Button
      • enableHelpOnButton

        public void enableHelpOnButton​(java.awt.MenuItem comp,
                                       java.lang.String id,
                                       HelpSet hs)
        Enables help for a MenuItem. Not implemented in ServletHelpBroker.
        Specified by:
        enableHelpOnButton in interface HelpBroker
        See Also:
        CSH.setHelpID, CSH.setHelpSet, MenuItem
      • setHelpSetPresentation

        public void setHelpSetPresentation​(HelpSet.Presentation pres)
        Description copied from interface: HelpBroker
        Sets the presentation attributes from a HelpSet.Presentation. The HelpSet.Presentation must be in the current HelpSet.
        Specified by:
        setHelpSetPresentation in interface HelpBroker
        Parameters:
        pres - The HelpSet.Presentation
      • showID

        public void showID​(java.lang.String id,
                           java.lang.String presentation,
                           java.lang.String presentationName)
                    throws BadIDException
        Description copied from interface: HelpBroker
        Displays this ID in a particular presentation
        Specified by:
        showID in interface HelpBroker
        Parameters:
        id - A String identifying the topic to show relative to getHelpSet()
        presentation - The Presentation class to display the Help in.
        presentationName - The name of a Presentation section from a HelpSet to use. For some Presentations this will also be the name to apply to the Presentation.
        Throws:
        BadIDException - if the ID is not valid in the map.
        See Also:
        Presentation
      • showID

        public void showID​(Map.ID id,
                           java.lang.String presentation,
                           java.lang.String presentationName)
                    throws InvalidHelpSetContextException
        Description copied from interface: HelpBroker
        Displays this ID in a given presentation
        Specified by:
        showID in interface HelpBroker
        Parameters:
        id - An ID that identifies the topic to display.
        presentation - The Presentation class to display the Help in.
        presentationName - The name of a Presentation section from a HelpSet to use. For some Presentations this will also be the name to apply to the Presentation.
        Throws:
        InvalidHelpSetContextException - If id.hs is not contanied in the current HelpSet of this broker.
        See Also:
        Presentation
      • enableHelpKey

        public void enableHelpKey​(java.awt.Component comp,
                                  java.lang.String id,
                                  HelpSet hs,
                                  java.lang.String presentation,
                                  java.lang.String presentationName)
        Description copied from interface: HelpBroker
        Enables the Help key on a component. This method works best when the component is the rootPane of a JFrame in Swing implementations, or a java.awt.Window (or subclass thereof) in AWT implementations. This method sets the default helpID and HelpSet for the component and registers keyboard actions to trap the "Help" keypress. When the "Help" key is pressed, if the object with the current focus has a helpID, the helpID is displayed, otherwise the default helpID is displayed.
        Specified by:
        enableHelpKey in interface HelpBroker
        Parameters:
        comp - The component to enable the keyboard actions on.
        id - The default HelpID to be displayed.
        hs - The default HelpSet to be displayed.
        presentation - The Presentation class to display the Help in.
        presentationName - The name of a Presentation section from a HelpSet to use. For some Presentations this will also be the name to apply to the Presentation.
        See Also:
        Presentation
      • enableHelpOnButton

        public void enableHelpOnButton​(java.lang.Object obj,
                                       java.lang.String id,
                                       HelpSet hs,
                                       java.lang.String presentation,
                                       java.lang.String presentationName)
        Description copied from interface: HelpBroker
        Enables help for an object. This method sets a object's helpID and HelpSet and adds an ActionListener. When an action is performed it displays the component's helpID and HelpSet in the default viewer or the presenation if defined. If the component is not a javax.swing.AbstractButton or a java.awt.Button an IllegalArgumentException is thrown.
        Specified by:
        enableHelpOnButton in interface HelpBroker
        id - The default HelpID to be displayed.
        hs - The default HelpSet to be displayed.
        presentation - The Presentation class to display the Help in.
        presentationName - The name of a Presentation section from a HelpSet to use. For some Presentations this will also be the name to apply to the Presentation.
        See Also:
        Presentation, CSH.setHelpID, CSH.setHelpSet, AbstractButton, Button