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

Nested Class Summary
- Nested classes/interfaces inherited from class javax.swing.plaf.basic.BasicComboBoxUI
  BasicComboBoxUI.ComboBoxLayoutManager, BasicComboBoxUI.FocusHandler, BasicComboBoxUI.ItemHandler, BasicComboBoxUI.KeyHandler, BasicComboBoxUI.ListDataHandler, BasicComboBoxUI.PropertyChangeHandler

Field Summary
- Fields inherited from class javax.swing.plaf.basic.BasicComboBoxUI
  arrowButton, cachedMinimumSize, comboBox, currentValuePane, editor, focusListener, hasFocus, isMinimumSizeDirty, itemListener, keyListener, listBox, listDataListener, padding, popup, popupKeyListener, popupMouseListener, popupMouseMotionListener, propertyChangeListener, squareButton
- Fields inherited from interface javax.swing.plaf.synth.SynthConstants
  DEFAULT, DISABLED, ENABLED, FOCUSED, MOUSE_OVER, PRESSED, SELECTED

Constructor Summary

Constructors
Constructor and Description

SynthComboBoxUI()

Eerste pagina van API Java Inhoudsopgave Haut

Method Summary

Methods
Modifier and Type	Method and Description
`protected JButton`	`createArrowButton()` Creates a button which will be used as the control to show or hide the popup portion of the combo box.
`protected ComboBoxEditor`	`createEditor()` Creates the default editor that will be used in editable combo boxes.
`protected ComboPopup`	`createPopup()` Creates the popup portion of the combo box.
`protected ListCellRenderer`	`createRenderer()` Creates the default renderer that will be used in a non-editiable combo box.
`static ComponentUI`	`createUI(JComponent c)` Creates a new UI object for the given component.
`SynthContext`	`getContext(JComponent c)` Returns the Context for the specified component.
`protected Dimension`	`getDefaultSize()` Returns the default size of an empty display area of the combo box using the current renderer and font.
`protected void`	`installDefaults()` Installs the default colors, default font, default renderer, and default editor into the JComboBox.
`protected void`	`installListeners()` Creates and installs listeners for the combo box and its model.
`void`	`installUI(JComponent c)` Configures the specified component appropriately for the look and feel.
`void`	`paint(Graphics g, JComponent c)` Paints the specified component according to the Look and Feel.
`protected void`	`paint(SynthContext context, Graphics g)` Paints the specified component.
`void`	`paintBorder(SynthContext context, Graphics g, int x, int y, int w, int h)` Paints the border.
`void`	`paintCurrentValue(Graphics g, Rectangle bounds, boolean hasFocus)` Paints the currently selected item.
`void`	`propertyChange(PropertyChangeEvent e)` This method gets called when a bound property is changed.
`protected void`	`uninstallDefaults()` Uninstalls the default colors, default font, default renderer, and default editor from the combo box.
`protected void`	`uninstallListeners()` Removes the installed listeners from the combo box and its model.
`void`	`uninstallUI(JComponent c)` Reverses configuration which was done on the specified component during `installUI`.
`void`	`update(Graphics g, JComponent c)` Notifies this UI delegate to repaint the specified component.

Eerste pagina van API Java Inhoudsopgave Haut

Methods inherited from class javax.swing.plaf.ComponentUI
contains

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - SynthComboBoxUI
```
public SynthComboBoxUI()
```
- 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)
```
    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 BasicComboBoxUI
    
    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()
```
    Description copied from class: BasicComboBoxUI
    
    Installs the default colors, default font, default renderer, and default editor into the JComboBox.
    
    Overrides:
    
    installDefaults in class BasicComboBoxUI
  - installListeners
```
protected void installListeners()
```
    Description copied from class: BasicComboBoxUI
    
    Creates and installs listeners for the combo box and its model. This method is called when the UI is installed.
    
    Overrides:
    
    installListeners in class BasicComboBoxUI
  - 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 BasicComboBoxUI
    
    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()
```
    Description copied from class: BasicComboBoxUI
    
    Uninstalls the default colors, default font, default renderer, and default editor from the combo box.
    
    Overrides:
    
    uninstallDefaults in class BasicComboBoxUI
  - uninstallListeners
```
protected void uninstallListeners()
```
    Description copied from class: BasicComboBoxUI
    
    Removes the installed listeners from the combo box and its model. The number and types of listeners removed and in this method should be the same that was added in installListeners
    
    Overrides:
    
    uninstallListeners in class BasicComboBoxUI
  - getContext
```
public SynthContext getContext(JComponent c)
```
    Description copied from interface: SynthUI
    
    Returns the Context for the specified component.
    
    Specified by:
    
    getContext in interface SynthUI
    
    Parameters:
    c - Component requesting SynthContext.
    
    Returns:
    SynthContext describing component.
  - createPopup
```
protected ComboPopup createPopup()
```
    Description copied from class: BasicComboBoxUI
    
    Creates the popup portion of the combo box.
    
    Overrides:
    
    createPopup in class BasicComboBoxUI
    
    Returns:
    an instance of ComboPopup
    See Also:
    ComboPopup
  - createRenderer
```
protected ListCellRenderer createRenderer()
```
    Description copied from class: BasicComboBoxUI
    
    Creates the default renderer that will be used in a non-editiable combo box. A default renderer will used only if a renderer has not been explicitly set with setRenderer.
    
    Overrides:
    
    createRenderer in class BasicComboBoxUI
    
    Returns:
    a ListCellRender used for the combo box
    See Also:
    JComboBox.setRenderer(javax.swing.ListCellRenderer<? super E>)
  - createEditor
```
protected ComboBoxEditor createEditor()
```
    Description copied from class: BasicComboBoxUI
    
    Creates the default editor that will be used in editable combo boxes. A default editor will be used only if an editor has not been explicitly set with setEditor.
    
    Overrides:
    
    createEditor in class BasicComboBoxUI
    
    Returns:
    a ComboBoxEditor used for the combo box
    See Also:
    JComboBox.setEditor(javax.swing.ComboBoxEditor)
  - propertyChange
```
public void propertyChange(PropertyChangeEvent e)
```
    Description copied from interface: PropertyChangeListener
    
    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.
  - createArrowButton
```
protected JButton createArrowButton()
```
    Description copied from class: BasicComboBoxUI
    
    Creates a button which will be used as the control to show or hide the popup portion of the combo box.
    
    Overrides:
    
    createArrowButton in class BasicComboBoxUI
    
    Returns:
    a button which represents the popup control
  - 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 BasicComboBoxUI
    
    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)
  - paintBorder
```
public void paintBorder(SynthContext context,
               Graphics g,
               int x,
               int y,
               int w,
               int h)
```
    Description copied from interface: SynthUI
    
    Paints the border.
    
    Specified by:
    
    paintBorder in interface SynthUI
    
    Parameters:
    context - a component context
    g - Graphics to paint on
    x - the X coordinate
    y - the Y coordinate
    w - width of the border
    h - height of the border
  - paintCurrentValue
```
public void paintCurrentValue(Graphics g,
                     Rectangle bounds,
                     boolean hasFocus)
```
    Paints the currently selected item.
    
    Overrides:
    
    paintCurrentValue in class BasicComboBoxUI
  - 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()

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Document heeft de 11/06/2005 gemaakt, de laatste keer de 04/03/2020 gewijzigd
Bron van het afgedrukte document:https://www.gaudry.be/nl/java-api-rf-javax/swing/plaf/synth/synthcomboboxui.html

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Referenties

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Inhoudsopgave Haut

Class SynthComboBoxUI

Nested Class Summary

Nested classes/interfaces inherited from class javax.swing.plaf.basic.BasicComboBoxUI

Field Summary

Fields inherited from class javax.swing.plaf.basic.BasicComboBoxUI

Fields inherited from interface javax.swing.plaf.synth.SynthConstants

Constructor Summary

Method Summary

Methods inherited from class javax.swing.plaf.basic.BasicComboBoxUI

Methods inherited from class javax.swing.plaf.ComponentUI

Methods inherited from class java.lang.Object

Constructor Detail

SynthComboBoxUI

Method Detail

createUI

installUI

installDefaults

installListeners

uninstallUI

uninstallDefaults

uninstallListeners

getContext

createPopup

createRenderer

createEditor

propertyChange

createArrowButton

update

paint

paint

paintBorder

paintCurrentValue

getDefaultSize

Referenties