Package javax.help

Class DefaultHelpBroker

java.lang.Object
javax.help.DefaultHelpBroker
All Implemented Interfaces:
KeyListener, EventListener, HelpBroker

public class DefaultHelpBroker extends Object implements HelpBroker, KeyListener
An implmentation of the HelpBroker interface
  • Field Details

    • displayHelpFromFocus

      protected ActionListener displayHelpFromFocus
    • displayHelpFromSource

      protected ActionListener displayHelpFromSource
  • Constructor Details

    • DefaultHelpBroker

      public DefaultHelpBroker(HelpSet hs)
      Constructor
    • DefaultHelpBroker

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

    • getWindowPresentation

      public WindowPresentation getWindowPresentation()
      Get the WindowPresentation for this HelpBroker
    • 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.
    • setHelpSetPresentation

      public void setHelpSetPresentation(HelpSet.Presentation hsPres)
      Set the presentation attributes from a HelpSet.Presentation. The HelpSet.Presentation must be in the current HelpSet.
      Specified by:
      setHelpSetPresentation in interface HelpBroker
      Parameters:
      hsPres - The HelpSet.Presentation
      Since:
      2.0
    • getLocale

      public 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

      public void setLocale(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:
    • getFont

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

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

      public void setCurrentView(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:
      IllegalArgumentException - if nav is null or not a valid Navigator.
    • getCurrentView

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

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

      public void setLocation(Point p)
      Requests the presentation be located at a given position.
      Specified by:
      setLocation in interface HelpBroker
    • getLocation

      public Point getLocation()
      Requests the location of the presentation.
      Specified by:
      getLocation in interface HelpBroker
    • setSize

      public void setSize(Dimension d)
      Requests the presentation be set to a given size.
      Specified by:
      setSize in interface HelpBroker
    • getSize

      public Dimension getSize() throws UnsupportedOperationException
      Requests the size of the presentation.
      Specified by:
      getSize in interface HelpBroker
      Throws:
      UnsupportedOperationException
    • setScreen

      public void setScreen(int screen)
      Requests the presentation be set to a given screen.
      Specified by:
      setScreen in interface HelpBroker
    • getScreen

      public int getScreen() throws UnsupportedOperationException
      Requests the screen of the presentation.
      Specified by:
      getScreen in interface HelpBroker
      Throws:
      UnsupportedOperationException
    • 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.
    • showID

      public void showID(String id, String presentation, String presentationName) throws BadIDException
      Shows this ID.
      Specified by:
      showID in interface HelpBroker
      Parameters:
      id - A string that identifies the topic to show for the loaded (top) HelpSet
      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 - The ID is not valid for the HelpSet
      IllegalArgumentException - if presentation is not valid
      See Also:
    • showID

      public void showID(Map.ID id, String presentation, String presentationName) throws InvalidHelpSetContextException
      Show this ID.
      Specified by:
      showID in interface HelpBroker
      Parameters:
      id - a Map.ID indicating the URL 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 the current helpset does not contain id.helpset
      See Also:
    • setCurrentID

      public void setCurrentID(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
    • setCurrentID

      public void setCurrentID(Map.ID id) throws InvalidHelpSetContextException
      Displays this ID--HelpVisitListeners are notified.
      Specified by:
      setCurrentID in interface HelpBroker
      Parameters:
      id - a Map.ID indicating the URL to display
      Throws:
      InvalidHelpSetContextException - if the current helpset does not contain id.helpset
      See Also:
    • 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(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 URL getCurrentURL()
      Determines which URL is displayed.
      Specified by:
      getCurrentURL in interface HelpBroker
      Returns:
      The URL being shown.
    • enableHelpKey

      public void enableHelpKey(Component comp, 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.
      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. If hs is null the default HelpSet will be assumed.
      See Also:
      • getHelpKeyActionListener
    • enableHelpKey

      public void enableHelpKey(Component comp, String id, HelpSet hs, String presentation, 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.
      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. If hs is null the default HelpSet from the HelpBroker is assummed. null is not valid if presenation is not null.
      presentation - The Presentation class to display the content in. If presentation is null the HelpBroker is used to display the content.
      presentationName - The name of a Presentation section to control the display of the content. Also for some Presenations this will be used to "name" the Presentation.
      Throws:
      IllegalArgumentException - if presentation != null and hs == null
      See Also:
      • getHelpKeyActionListener
    • keyTyped

      public void keyTyped(KeyEvent e)
      Invoked when a key is typed. This event occurs when a key press is followed by a key release. Not intended to be overridden or extended.
      Specified by:
      keyTyped in interface KeyListener
    • keyPressed

      public void keyPressed(KeyEvent e)
      Invoked when a key is pressed. Not intended to be overridden or extended.
      Specified by:
      keyPressed in interface KeyListener
    • keyReleased

      public void keyReleased(KeyEvent e)
      Invoked when a key is released. Not intended to be overridden or extended.
      Specified by:
      keyReleased in interface KeyListener
    • enableHelp

      public void enableHelp(Component comp, String id, HelpSet hs)
      Enables help for a Component. This method sets a component's helpID and HelpSet.
      Specified by:
      enableHelp in interface HelpBroker
      Parameters:
      comp - the Component to set the id and hs on.
      id - the String value of an Map.ID.
      hs - the HelpSet the id is in. If hs is null the default HelpSet will be assumed.
      See Also:
      • CSH.setHelpID
      • CSH.setHelpSet
    • enableHelp

      public void enableHelp(MenuItem comp, String id, HelpSet hs)
      Enables help for a MenuItem. This method sets a component's helpID and HelpSet.
      Specified by:
      enableHelp in interface HelpBroker
      Parameters:
      comp - the MenuItem to set the id and hs on.
      id - the String value of an Map.ID.
      hs - the HelpSet the id is in. If hs is null the default HelpSet will be assumed.
      See Also:
      • CSH.setHelpID
      • CSH.setHelpSet
    • enableHelpOnButton

      public void enableHelpOnButton(Component comp, String id, HelpSet hs)
      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.
      Specified by:
      enableHelpOnButton in interface HelpBroker
      Parameters:
      comp - the Component to set the id and hs on. If the Component is not a javax.swing.AbstractButton or a java.awt.Button an IllegalArgumentException is thrown.
      id - the String value of an Map.ID.
      hs - the HelpSet the id is in. If hs is null the default HelpSet will be assumed.
      Throws:
      IllegalArgumentException - if comp is null.
      See Also:
    • enableHelpOnButton

      public void enableHelpOnButton(MenuItem comp, 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.
      Specified by:
      enableHelpOnButton in interface HelpBroker
      Parameters:
      comp - the MenuItem to set the id and hs on. If comp is null an IllegalAgrumentException is thrown.
      id - the String value of an Map.ID.
      hs - the HelpSet the id is in. If hs is null the default HelpSet will be assumed.
      Throws:
      IllegalArgumentException - if comp is null.
      See Also:
    • enableHelpOnButton

      public void enableHelpOnButton(Object obj, String id, HelpSet hs, String presentation, String presentationName)
      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.
      Specified by:
      enableHelpOnButton in interface HelpBroker
      Parameters:
      comp - the Component to set the id and hs on. If the Component is not a javax.swing.AbstractButton or a java.awt.Button an IllegalArgumentException is thrown.
      id - the String value of an Map.ID.
      hs - the HelpSet the id is in. If hs is null the default HelpSet will be assumed.
      Throws:
      IllegalArgumentException - if comp is null.
      See Also:
    • getDisplayHelpFromFocus

      protected ActionListener getDisplayHelpFromFocus()
      Returns the default DisplayHelpFromFocus listener.
      See Also:
    • getDisplayHelpFromSource

      protected ActionListener getDisplayHelpFromSource()
      Returns the default DisplayHelpFromSource listener.
      See Also:
    • setActivationObject

      public void setActivationObject(Object comp)
      Set the activation window from given Component or MenuItem. It find Window component in the component tree from given Component or MenuItem end call
      setActivationWindow
      .
      Since:
      1.1
      See Also:
    • setActivationWindow

      public void setActivationWindow(Window window)
      Set the activation window. If the window is an instance of a Dialog and the is modal, modallyActivated help is set to true and ownerDialog is set to the window. In all other instances modallyActivated is set to false and ownerDialog is set to null.
      Parameters:
      window - the activating window
      Since:
      1.1