Package javax.help

Interface HelpBroker

  • All Known Implementing Classes:
    DefaultHelpBroker, ServletHelpBroker

    public interface HelpBroker
    The HelpBroker is the default presentation of a HelpSet. A HelpBroker is an abstraction of the presentation for a HelpSet; a straight-forward implementation is a JHelp() on the HelpSet. A HelpBroker can be asked to show a given Navigational View, and can display a given ID (help topic).
    See Also:
    HelpSet, JHelpNavigator, javax.help.HelpVisitListener
    • Method Summary

      All Methods Instance Methods Abstract 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 The currently displayed ID (if any).
      java.net.URL getCurrentURL()
      Determines the currently displayed ID.
      java.lang.String getCurrentView()
      Gets name of the current navigational view.
      java.awt.Font getFont()
      Gets the font for this HelpBroker.
      HelpSet getHelpSet()
      Gets the current HelpSet for this JavaHelp object.
      java.util.Locale getLocale()
      Returns the locale of this object.
      java.awt.Point getLocation()
      Gets the location of the presentation.
      int getScreen()
      Get ths the screen the presentation is displayed on This operation may throw an UnsupportedOperationException if the underlying implementation does not allow this.
      java.awt.Dimension getSize()
      Gets the size of the presentation.
      void initPresentation()
      Initializes the presentation.
      boolean isDisplayed()
      Determines if the presentation is visible.
      boolean isViewDisplayed()
      Determines if the Navigational View is visible.
      void setCurrentID​(java.lang.String id)
      Displays this ID.
      void setCurrentID​(Map.ID id)
      Displays this ID.
      void setCurrentURL​(java.net.URL url)
      Displays this ID.
      void setCurrentView​(java.lang.String name)
      Activates the Navigator view with a given name.
      void setDisplayed​(boolean displayed)
      Displays the presentation to the user.
      void setFont​(java.awt.Font f)
      Sets the font for this HelpBroker.
      void setHelpSet​(HelpSet hs)
      Sets the current HelpSet for this HelpBroker.
      void setHelpSetPresentation​(HelpSet.Presentation hsPres)
      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)
      Sets the position of the presentation.
      void setScreen​(int screen)
      Set the screen the presentation is to be displayed on This operation may throw an UnsupportedOperationException if the underlying implementation does not allow this.
      void setSize​(java.awt.Dimension d)
      Sets the size of the presentation.
      void setViewDisplayed​(boolean displayed)
      Hides/Shows Navigational Views.
      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
    • Method Detail

      • setHelpSet

        void setHelpSet​(HelpSet hs)
        Sets the current HelpSet for this HelpBroker.
        Parameters:
        hs - The HelpSet this JavaHelp is presenting.
      • getHelpSet

        HelpSet getHelpSet()
        Gets the current HelpSet for this JavaHelp object.
        Returns:
        The HelpSet this JavaHelp is presenting.
      • setHelpSetPresentation

        void setHelpSetPresentation​(HelpSet.Presentation hsPres)
        Sets the presentation attributes from a HelpSet.Presentation. The HelpSet.Presentation must be in the current HelpSet.
        Parameters:
        hsPres - The HelpSet.Presentation
        Since:
        2.0
      • getLocale

        java.util.Locale getLocale()
        Returns the locale of this object.
        Returns:
        The locale of this object.
      • setLocale

        void setLocale​(java.util.Locale l)
        Sets the locale of this HelpBroker.
        Parameters:
        l - The locale to become this component's locale.
        See Also:
        getLocale()
      • getFont

        java.awt.Font getFont()
        Gets the font for this HelpBroker.
      • setFont

        void setFont​(java.awt.Font f)
        Sets the font for this HelpBroker.
      • setCurrentView

        void setCurrentView​(java.lang.String name)
        Activates the Navigator view with a given name.
        Throws:
        java.lang.IllegalArgumentException - if the name is not valid.
      • getCurrentView

        java.lang.String getCurrentView()
        Gets name of the current navigational view.
        Returns:
        The name of the current navigational view.
      • initPresentation

        void initPresentation()
        Initializes the presentation. This method allows the presentation to be initialized but not displayed. Typically this is done in a separate thread to reduce the intialization time.
      • setDisplayed

        void setDisplayed​(boolean displayed)
                   throws UnsupportedOperationException
        Displays the presentation to the user.
        Parameters:
        displayed - Makes the presentation visible or not.
        Throws:
        HelpBroker.UnsupportedOperationException - If the operation is not supported.
        UnsupportedOperationException
      • isDisplayed

        boolean isDisplayed()
        Determines if the presentation is visible.
        Returns:
        Whether the presentation is currently visible.
      • setViewDisplayed

        void setViewDisplayed​(boolean displayed)
        Hides/Shows Navigational Views.
        Parameters:
        displayed - Make the navigational views visible or not.
      • isViewDisplayed

        boolean isViewDisplayed()
        Determines if the Navigational View is visible.
        Returns:
        Whether the navigational views are visible.
      • showID

        void showID​(Map.ID id,
                    java.lang.String presentation,
                    java.lang.String presentationName)
             throws InvalidHelpSetContextException
        Displays this ID in a given presentation
        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
      • showID

        void showID​(java.lang.String id,
                    java.lang.String presentation,
                    java.lang.String presentationName)
             throws BadIDException
        Displays this ID in a particular presentation
        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
      • setCurrentID

        void setCurrentID​(java.lang.String id)
                   throws BadIDException
        Displays this ID. HelpVisitListeners are notified.
        Parameters:
        id - A String identifying the topic to show relative to getHelpSet()
        Throws:
        BadIDException - if the ID is not valid in the map.
      • getCurrentID

        Map.ID getCurrentID()
        Determines The currently displayed ID (if any).
        Returns:
        The ID being shown.
      • setCurrentURL

        void setCurrentURL​(java.net.URL url)
        Displays this ID. HelpVisitListeners are notified. The currentID changes if there is a matching ID for this URL.
        Parameters:
        url - The URL to show
      • getCurrentURL

        java.net.URL getCurrentURL()
        Determines the currently displayed ID.
        Returns:
        The URL being shown.
      • enableHelpKey

        void enableHelpKey​(java.awt.Component comp,
                           java.lang.String id,
                           HelpSet hs)
        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.
        Parameters:
        comp - The component to enable the keyboard actions on.
        id - The default HelpID to be displayed.
        hs - The default HelpSet to be displayed.
      • enableHelpKey

        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. 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.
        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
      • enableHelp

        void enableHelp​(java.awt.Component comp,
                        java.lang.String id,
                        HelpSet hs)
        Enables help for a component. This method sets a component's helpID and HelpSet.
        See Also:
        CSH.setHelpID, CSH.setHelpSet
      • enableHelp

        void enableHelp​(java.awt.MenuItem comp,
                        java.lang.String id,
                        HelpSet hs)
        Enables help for a MenuItem. This method sets a component's helpID and HelpSet.
        See Also:
        CSH.setHelpID, CSH.setHelpSet
      • enableHelpOnButton

        void enableHelpOnButton​(java.awt.Component comp,
                                java.lang.String id,
                                HelpSet hs)
                         throws java.lang.IllegalArgumentException
        Enables help for a component. This method sets a component'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. If the component is not a javax.swing.AbstractButton or a java.awt.Button an IllegalArgumentException is thrown.
        Throws:
        java.lang.IllegalArgumentException
        See Also:
        CSH.setHelpID, CSH.setHelpSet, AbstractButton, Button
      • enableHelpOnButton

        void enableHelpOnButton​(java.awt.MenuItem comp,
                                java.lang.String id,
                                HelpSet hs)
        Enables help for a MenuItem. This method sets a component'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.
        See Also:
        CSH.setHelpID, CSH.setHelpSet, MenuItem
      • enableHelpOnButton

        void enableHelpOnButton​(java.lang.Object obj,
                                java.lang.String id,
                                HelpSet hs,
                                java.lang.String presentation,
                                java.lang.String presentationName)
                         throws java.lang.IllegalArgumentException
        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.
        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.
        Throws:
        java.lang.IllegalArgumentException
        See Also:
        Presentation, CSH.setHelpID, CSH.setHelpSet, AbstractButton, Button