IT. Expert System.

Java Standard Edition (SE)

BasicMenuItemUI


javax.swing.plaf.basic

Class BasicMenuItemUI

    • Field Detail

      • selectionBackground

        protected Color selectionBackground
      • selectionForeground

        protected Color selectionForeground
      • disabledForeground

        protected Color disabledForeground
      • acceleratorForeground

        protected Color acceleratorForeground
      • acceleratorSelectionForeground

        protected Color acceleratorSelectionForeground
      • acceleratorDelimiter

        protected String acceleratorDelimiter
        Accelerator delimiter string, such as '+' in 'Ctrl+C'.
        Since:
        1.7
      • defaultTextIconGap

        protected int defaultTextIconGap
      • acceleratorFont

        protected Font acceleratorFont
      • arrowIcon

        protected Icon arrowIcon
      • checkIcon

        protected Icon checkIcon
      • oldBorderPainted

        protected boolean oldBorderPainted
    • Constructor Detail

      • BasicMenuItemUI

        public BasicMenuItemUI()
    • Method Detail

      • 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:
        ComponentUI.uninstallUI(javax.swing.JComponent), JComponent.setUI(javax.swing.plaf.ComponentUI), JComponent.updateUI()
      • installDefaults

        protected void installDefaults()
      • installComponents

        protected void installComponents(JMenuItem menuItem)
        Since:
        1.3
      • getPropertyPrefix

        protected String getPropertyPrefix()
      • installListeners

        protected void installListeners()
      • installKeyboardActions

        protected void installKeyboardActions()
      • 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:
        ComponentUI.installUI(javax.swing.JComponent), JComponent.updateUI()
      • uninstallDefaults

        protected void uninstallDefaults()
      • uninstallComponents

        protected void uninstallComponents(JMenuItem menuItem)
        Since:
        1.3
      • uninstallListeners

        protected void uninstallListeners()
      • uninstallKeyboardActions

        protected void uninstallKeyboardActions()
      • createPropertyChangeListener

        protected PropertyChangeListener createPropertyChangeListener(JComponent c)
        Creates a PropertyChangeListener which will be added to the menu item. If this method returns null then it will not be added to the menu item.
        Returns:
        an instance of a PropertyChangeListener or null
        Since:
        1.6
      • getPreferredSize

        public Dimension getPreferredSize(JComponent c)
        Description copied from class: ComponentUI
        Returns the specified component's preferred size appropriate for the look and feel. If null is returned, the preferred 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 returns null.
        Overrides:
        getPreferredSize in class ComponentUI
        Parameters:
        c - the component whose preferred size is being queried; this argument is often ignored, but might be used if the UI object is stateless and shared by multiple components
        See Also:
        JComponent.getPreferredSize(), LayoutManager.preferredLayoutSize(java.awt.Container)
      • 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:
        JComponent.getMaximumSize(), LayoutManager2.maximumLayoutSize(java.awt.Container)
      • getPreferredMenuItemSize

        protected Dimension getPreferredMenuItemSize(JComponent c,
                                                     Icon checkIcon,
                                                     Icon arrowIcon,
                                                     int defaultTextIconGap)
      • paint

        public void paint(Graphics g,
                          JComponent c)
        Description copied from class: ComponentUI
        Paints the specified component appropriately for the look and feel. This method is invoked from the ComponentUI.update method when the specified component is being painted. Subclasses should override this method and use the specified Graphics object to render the content of the component.
        Overrides:
        paint in class ComponentUI
        Parameters:
        g - the Graphics context in which to paint
        c - the component being painted; this argument is often ignored, but might be used if the UI object is stateless and shared by multiple components
        See Also:
        ComponentUI.update(java.awt.Graphics, javax.swing.JComponent)
      • paintBackground

        protected void paintBackground(Graphics g,
                                       JMenuItem menuItem,
                                       Color bgColor)
        Draws the background of the menu item.
        Parameters:
        g - the paint graphics
        menuItem - menu item to be painted
        bgColor - selection background color
        Since:
        1.4
      • paintText

        protected void paintText(Graphics g,
                                 JMenuItem menuItem,
                                 Rectangle textRect,
                                 String text)
        Renders the text of the current menu item.

        Parameters:
        g - graphics context
        menuItem - menu item to render
        textRect - bounding rectangle for rendering the text
        text - string to render
        Since:
        1.4
      • doClick

        protected void doClick(MenuSelectionManager msm)
        Call this method when a menu item is to be activated. This method handles some of the details of menu item activation such as clearing the selected path and messaging the JMenuItem's doClick() method.
        Parameters:
        msm - A MenuSelectionManager. The visual feedback and internal bookkeeping tasks are delegated to this MenuSelectionManager. If null is passed as this argument, the MenuSelectionManager.defaultManager is used.
        Since:
        1.4
        See Also:
        MenuSelectionManager, AbstractButton.doClick(int)


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