Class BasicMenuBarUI

java.lang.Object
javax.swing.plaf.ComponentUI
javax.swing.plaf.MenuBarUI
javax.swing.plaf.basic.BasicMenuBarUI
Direct Known Subclasses:
MetalMenuBarUI, SynthMenuBarUI
public class BasicMenuBarUI extends MenuBarUI
A default L&F implementation of MenuBarUI. This implementation is a "combined" view/controller.

  • Field Details

    • containerListener

      protected ContainerListener containerListener
      The instance of ContainerListener.

    • changeListener

      protected ChangeListener changeListener
      The instance of ChangeListener.

  • Constructor Details

    • BasicMenuBarUI

      public BasicMenuBarUI()
      Constructs a BasicMenuBarUI.

  • Method Details

    • createUI

      public static ComponentUI createUI(JComponent x)
      Returns a new instance of BasicMenuBarUI.
      Parameters:
      x - a component
      Returns:
      a new instance of BasicMenuBarUI

    • installUI

      public void installUI(JComponent c)
      Description copied from class: ComponentUI
      Configures the specified component appropriately for the look and feel. This method is invoked when the ComponentUI instance is being installed as the UI delegate on the specified component. This method should completely configure the component for the look and feel, including the following:
      1. Install default property values for color, fonts, borders, icons, opacity, etc. on the component. Whenever possible, property values initialized by the client program should not be overridden.
      2. Install a LayoutManager on the component if necessary.
      3. Create/add any required sub-components to the component.
      4. Create/install event listeners on the component.
      5. Create/install a PropertyChangeListener on the component in order to detect and respond to component property changes appropriately.
      6. Install keyboard UI (mnemonics, traversal, etc.) on the component.
      7. Initialize any appropriate instance data.
      Overrides:
      installUI in class ComponentUI
      Parameters:
      c - the component where this UI delegate is being installed
      See Also:

    • installDefaults

      protected void installDefaults()
      Installs default properties.

    • installListeners

      protected void installListeners()
      Registers listeners.

    • installKeyboardActions

      protected void installKeyboardActions()
      Registers keyboard actions.

    • uninstallUI

      public void uninstallUI(JComponent c)
      Description copied from class: ComponentUI
      Reverses configuration which was done on the specified component during installUI. This method is invoked when this UIComponent instance is being removed as the UI delegate for the specified component. This method should undo the configuration performed in installUI, being careful to leave the JComponent instance in a clean state (no extraneous listeners, look-and-feel-specific property objects, etc.). This should include the following:
      1. Remove any UI-set borders from the component.
      2. Remove any UI-set layout managers on the component.
      3. Remove any UI-added sub-components from the component.
      4. Remove any UI-added event/property listeners from the component.
      5. Remove any UI-installed keyboard UI from the component.
      6. Nullify any allocated instance data objects to allow for GC.
      Overrides:
      uninstallUI in class ComponentUI
      Parameters:
      c - the component from which this UI delegate is being removed; this argument is often ignored, but might be used if the UI object is stateless and shared by multiple components
      See Also:

    • uninstallDefaults

      protected void uninstallDefaults()
      Uninstalls default properties.

    • uninstallListeners

      protected void uninstallListeners()
      Unregisters listeners.

    • uninstallKeyboardActions

      protected void uninstallKeyboardActions()
      Unregisters keyboard actions.

    • createContainerListener

      protected ContainerListener createContainerListener()
      Returns an instance of ContainerListener.
      Returns:
      an instance of ContainerListener

    • createChangeListener

      protected ChangeListener createChangeListener()
      Returns an instance of ChangeListener.
      Returns:
      an instance of ChangeListener

    • getMinimumSize

      public Dimension getMinimumSize(JComponent c)
      Description copied from class: ComponentUI
      Returns the specified component's minimum size appropriate for the look and feel. If null is returned, the minimum size will be calculated by the component's layout manager instead (this is the preferred approach for any component with a specific layout manager installed). The default implementation of this method invokes getPreferredSize and returns that value.
      Overrides:
      getMinimumSize in class ComponentUI
      Parameters:
      c - the component whose minimum size is being queried; this argument is often ignored, but might be used if the UI object is stateless and shared by multiple components
      Returns:
      a Dimension object or null
      See Also:

    • getMaximumSize

      public Dimension getMaximumSize(JComponent c)
      Description copied from class: ComponentUI
      Returns the specified component's maximum size appropriate for the look and feel. If null is returned, the maximum size will be calculated by the component's layout manager instead (this is the preferred approach for any component with a specific layout manager installed). The default implementation of this method invokes getPreferredSize and returns that value.
      Overrides:
      getMaximumSize in class ComponentUI
      Parameters:
      c - the component whose maximum size is being queried; this argument is often ignored, but might be used if the UI object is stateless and shared by multiple components
      Returns:
      a Dimension object or null
      See Also: