Module java.desktop
Package javax.swing.plaf.synth

Class SynthComboBoxUI

java.lang.Object
javax.swing.plaf.ComponentUI
javax.swing.plaf.ComboBoxUI
javax.swing.plaf.basic.BasicComboBoxUI
javax.swing.plaf.synth.SynthComboBoxUI
All Implemented Interfaces:
PropertyChangeListener, EventListener, SynthConstants, SynthUI
public class SynthComboBoxUI
extends BasicComboBoxUI
implements PropertyChangeListener, SynthUI
Provides the Synth L&F UI delegate for JComboBox.
Since:
1.7

  • Constructor Details

  • Method Details

    • 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.
      Overridden to ensure that ButtonHandler is created prior to any of the other installXXX methods, since several of them reference buttonHandler.
      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()

    • 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)

    • paint

      public void paint​(Graphics g, JComponent c)
      Paints the specified component according to the Look and Feel.

      This method is not used by Synth Look and Feel. Painting is handled by the paint(SynthContext,Graphics) method.

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

    • paint

      protected void paint​(SynthContext context, Graphics g)
      Paints the specified component.
      Parameters:
      context - context for the component being painted
      g - the Graphics object used for painting
      See Also:
      update(Graphics,JComponent)

    • paintCurrentValue

      public void paintCurrentValue​(Graphics g, Rectangle bounds, boolean hasFocus)
      Paints the currently selected item.
      Overrides:
      paintCurrentValue in class BasicComboBoxUI
      Parameters:
      g - an instance of Graphics
      bounds - a bounding rectangle to render to
      hasFocus - is focused

    • getDefaultSize

      protected Dimension getDefaultSize()
      Returns the default size of an empty display area of the combo box using the current renderer and font. This method was overridden to use SynthComboBoxRenderer instead of DefaultListCellRenderer as the default renderer when calculating the size of the combo box. This is used in the case of the combo not having any data.
      Overrides:
      getDefaultSize in class BasicComboBoxUI
      Returns:
      the size of an empty display area
      See Also:
      BasicComboBoxUI.getDisplaySize()