IT. Expert System.

Java Standard Edition (SE)

SynthViewportUI


javax.swing.plaf.synth

Class SynthViewportUI

    • Constructor Detail

      • SynthViewportUI

        public SynthViewportUI()
    • Method Detail

      • createUI

        public static ComponentUI createUI(JComponent c)
        Creates a new UI object for the given component.
        Parameters:
        c - component to create UI object for
        Returns:
        the UI object
      • installUI

        public void installUI(JComponent c)
        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()
      • uninstallUI

        public void uninstallUI(JComponent c)
        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()
      • installDefaults

        protected void installDefaults(JComponent c)
        Installs defaults for a viewport.
        Parameters:
        c - a JViewport object
      • installListeners

        protected void installListeners(JComponent c)
        Installs listeners into the viewport.
        Parameters:
        c - a JViewport object
      • uninstallListeners

        protected void uninstallListeners(JComponent c)
        Uninstalls listeners from the viewport.
        Parameters:
        c - a JViewport object
      • uninstallDefaults

        protected void uninstallDefaults(JComponent c)
        Uninstalls defaults from a viewport.
        Parameters:
        c - a JViewport object
      • getContext

        public SynthContext getContext(JComponent c)
        Returns the Context for the specified component.
        Specified by:
        getContext in interface SynthUI
        Parameters:
        c - Component requesting SynthContext.
        Returns:
        SynthContext describing component.
      • update

        public void update(Graphics g,
                           JComponent c)
        Notifies this UI delegate to repaint the specified component. This method paints the component background, then calls the paint(SynthContext,Graphics) method.

        In general, this method does not need to be overridden by subclasses. All Look and Feel rendering code should reside in the paint method.

        Overrides:
        update in class ComponentUI
        Parameters:
        g - the Graphics object used for painting
        c - the component being painted
        See Also:
        paint(SynthContext,Graphics)
      • paintBorder

        public void paintBorder(SynthContext context,
                                Graphics g,
                                int x,
                                int y,
                                int w,
                                int h)
        Paints the border. The method is never called, because the JViewport class does not support a border. This implementation does nothing.
        Specified by:
        paintBorder in interface SynthUI
        Parameters:
        context - a component context
        g - the Graphics to paint on
        x - the X coordinate
        y - the Y coordinate
        w - width of the border
        h - height of the border
      • paint

        protected void paint(SynthContext context,
                             Graphics g)
        Paints the specified component. This implementation does nothing.
        Parameters:
        context - context for the component being painted
        g - the Graphics object used for painting
        See Also:
        update(Graphics,JComponent)
      • propertyChange

        public void propertyChange(PropertyChangeEvent e)
        This method gets called when a bound property is changed.
        Specified by:
        propertyChange in interface PropertyChangeListener
        Parameters:
        e - A PropertyChangeEvent object describing the event source and the property that has changed.


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