Class JColorChooser

java.lang.Object

java.awt.Component

java.awt.Container

javax.swing.JComponent

javax.swing.JColorChooser

All Implemented Interfaces:

ImageObserver, MenuContainer, Serializable, Accessible

@JavaBean(defaultProperty="UI",
          description="A component that supports selecting a Color.")
public class JColorChooser
extends JComponent
implements Accessible

JColorChooser provides a pane of controls designed to allow a user to manipulate and select a color. For information about using color choosers, see How to Use Color Choosers, a section in The Java Tutorial.

This class provides three levels of API:

1. A static convenience method which shows a modal color-chooser dialog and returns the color selected by the user.
2. A static convenience method for creating a color-chooser dialog where ActionListeners can be specified to be invoked when the user presses one of the dialog buttons.
3. The ability to create instances of JColorChooser panes directly (within any container). PropertyChange listeners can be added to detect when the current "color" property changes.

Warning: Swing is not thread safe. For more information see Swing's Threading Policy.

Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. As of 1.4, support for long term storage of all JavaBeans has been added to the java.beans package. Please see XMLEncoder.

Since:

1.2

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected class	JColorChooser.AccessibleJColorChooser	This class implements accessibility support for the JColorChooser class.

Nested classes/interfaces declared in class javax.swing.JComponent

JComponent.AccessibleJComponent

Nested classes/interfaces declared in class java.awt.Container

Container.AccessibleAWTContainer

Nested classes/interfaces declared in class java.awt.Component

Component.AccessibleAWTComponent, Component.BaselineResizeBehavior, Component.BltBufferStrategy, Component.FlipBufferStrategy

Field Summary

Fields

Modifier and Type	Field	Description
protected AccessibleContext	accessibleContext	The accessible context.
static final String	CHOOSER_PANELS_PROPERTY	The chooserPanel array property name.
static final String	PREVIEW_PANEL_PROPERTY	The preview panel property name.
static final String	SELECTION_MODEL_PROPERTY	The selection model property name.

Fields declared in class javax.swing.JComponent

listenerList, TOOL_TIP_TEXT_KEY, ui, UNDEFINED_CONDITION, WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, WHEN_FOCUSED, WHEN_IN_FOCUSED_WINDOW

Fields declared in class java.awt.Component

BOTTOM_ALIGNMENT, CENTER_ALIGNMENT, LEFT_ALIGNMENT, RIGHT_ALIGNMENT, TOP_ALIGNMENT

Fields declared in interface java.awt.image.ImageObserver

ABORT, ALLBITS, ERROR, FRAMEBITS, HEIGHT, PROPERTIES, SOMEBITS, WIDTH

Constructor Summary

Constructors

Constructor	Description
JColorChooser()	Creates a color chooser pane with an initial color of white.
JColorChooser(Color initialColor)	Creates a color chooser pane with the specified initial color.
JColorChooser(ColorSelectionModel model)	Creates a color chooser pane with the specified ColorSelectionModel.

Method Summary

Modifier and Type	Method	Description
void	addChooserPanel(AbstractColorChooserPanel panel)	Adds a color chooser panel to the color chooser.
static JDialog	createDialog(Component c, String title, boolean modal, JColorChooser chooserPane, ActionListener okListener, ActionListener cancelListener)	Creates and returns a new dialog containing the specified ColorChooser pane along with "OK", "Cancel", and "Reset" buttons.
AccessibleContext	getAccessibleContext()	Gets the AccessibleContext associated with this JColorChooser.
AbstractColorChooserPanel[]	getChooserPanels()	Returns the specified color panels.
Color	getColor()	Gets the current color value from the color chooser.
boolean	getDragEnabled()	Gets the value of the dragEnabled property.
JComponent	getPreviewPanel()	Returns the preview panel that shows a chosen color.
ColorSelectionModel	getSelectionModel()	Returns the data model that handles color selections.
ColorChooserUI	getUI()	Returns the L&F object that renders this component.
String	getUIClassID()	Returns the name of the L&F class that renders this component.
protected String	paramString()	Returns a string representation of this JColorChooser.
AbstractColorChooserPanel	removeChooserPanel(AbstractColorChooserPanel panel)	Removes the Color Panel specified.
void	setChooserPanels(AbstractColorChooserPanel[] panels)	Specifies the Color Panels used to choose a color value.
void	setColor(int c)	Sets the current color of the color chooser to the specified color.
void	setColor(int r, int g, int b)	Sets the current color of the color chooser to the specified RGB color.
void	setColor(Color color)	Sets the current color of the color chooser to the specified color.
void	setDragEnabled(boolean b)	Sets the dragEnabled property, which must be true to enable automatic drag handling (the first part of drag and drop) on this component.
void	setPreviewPanel(JComponent preview)	Sets the current preview panel.
void	setSelectionModel(ColorSelectionModel newModel)	Sets the model containing the selected color.
void	setUI(ColorChooserUI ui)	Sets the L&F object that renders this component.
static Color	showDialog(Component component, String title, Color initialColor)	Shows a modal color-chooser dialog and blocks until the dialog is hidden.
static Color	showDialog(Component component, String title, Color initialColor, boolean colorTransparencySelectionEnabled)	Shows a modal color-chooser dialog and blocks until the dialog is hidden.
void	updateUI()	Notification from the UIManager that the L&F has changed.

Methods declared in class javax.swing.JComponent

addAncestorListener, addNotify, addVetoableChangeListener, computeVisibleRect, contains, createToolTip, disable, enable, firePropertyChange, firePropertyChange, fireVetoableChange, getActionForKeyStroke, getActionMap, getAlignmentX, getAlignmentY, getAncestorListeners, getAutoscrolls, getBaseline, getBaselineResizeBehavior, getBorder, getBounds, getClientProperty, getComponentGraphics, getComponentPopupMenu, getConditionForKeyStroke, getDebugGraphicsOptions, getDefaultLocale, getFontMetrics, getGraphics, getHeight, getInheritsPopupMenu, getInputMap, getInputMap, getInputVerifier, getInsets, getInsets, getListeners, getLocation, getMaximumSize, getMinimumSize, getNextFocusableComponent, getPopupLocation, getPreferredSize, getRegisteredKeyStrokes, getRootPane, getSize, getToolTipLocation, getToolTipText, getToolTipText, getTopLevelAncestor, getTransferHandler, getVerifyInputWhenFocusTarget, getVetoableChangeListeners, getVisibleRect, getWidth, getX, getY, grabFocus, hide, isDoubleBuffered, isLightweightComponent, isManagingFocus, isOpaque, isOptimizedDrawingEnabled, isPaintingForPrint, isPaintingOrigin, isPaintingTile, isRequestFocusEnabled, isValidateRoot, paint, paintBorder, paintChildren, paintComponent, paintImmediately, paintImmediately, print, printAll, printBorder, printChildren, printComponent, processComponentKeyEvent, processKeyBinding, processKeyEvent, processMouseEvent, processMouseMotionEvent, putClientProperty, registerKeyboardAction, registerKeyboardAction, removeAncestorListener, removeNotify, removeVetoableChangeListener, repaint, repaint, requestDefaultFocus, requestFocus, requestFocus, requestFocusInWindow, requestFocusInWindow, resetKeyboardActions, reshape, revalidate, scrollRectToVisible, setActionMap, setAlignmentX, setAlignmentY, setAutoscrolls, setBackground, setBorder, setComponentPopupMenu, setDebugGraphicsOptions, setDefaultLocale, setDoubleBuffered, setEnabled, setFocusTraversalKeys, setFont, setForeground, setInheritsPopupMenu, setInputMap, setInputVerifier, setMaximumSize, setMinimumSize, setNextFocusableComponent, setOpaque, setPreferredSize, setRequestFocusEnabled, setToolTipText, setTransferHandler, setUI, setVerifyInputWhenFocusTarget, setVisible, unregisterKeyboardAction, update

Methods declared in class java.awt.Container

add, add, add, add, add, addContainerListener, addImpl, addPropertyChangeListener, addPropertyChangeListener, applyComponentOrientation, areFocusTraversalKeysSet, countComponents, deliverEvent, doLayout, findComponentAt, findComponentAt, getComponent, getComponentAt, getComponentAt, getComponentCount, getComponents, getComponentZOrder, getContainerListeners, getFocusTraversalKeys, getFocusTraversalPolicy, getLayout, getMousePosition, insets, invalidate, isAncestorOf, isFocusCycleRoot, isFocusCycleRoot, isFocusTraversalPolicyProvider, isFocusTraversalPolicySet, layout, list, list, locate, minimumSize, paintComponents, preferredSize, printComponents, processContainerEvent, processEvent, remove, remove, removeAll, removeContainerListener, setComponentZOrder, setFocusCycleRoot, setFocusTraversalPolicy, setFocusTraversalPolicyProvider, setLayout, transferFocusDownCycle, validate, validateTree

Methods declared in class java.awt.Component

action, add, addComponentListener, addFocusListener, addHierarchyBoundsListener, addHierarchyListener, addInputMethodListener, addKeyListener, addMouseListener, addMouseMotionListener, addMouseWheelListener, bounds, checkImage, checkImage, coalesceEvents, contains, createImage, createImage, createVolatileImage, createVolatileImage, disableEvents, dispatchEvent, enable, enableEvents, enableInputMethods, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, firePropertyChange, getBackground, getBounds, getColorModel, getComponentListeners, getComponentOrientation, getCursor, getDropTarget, getFocusCycleRootAncestor, getFocusListeners, getFocusTraversalKeysEnabled, getFont, getForeground, getGraphicsConfiguration, getHierarchyBoundsListeners, getHierarchyListeners, getIgnoreRepaint, getInputContext, getInputMethodListeners, getInputMethodRequests, getKeyListeners, getLocale, getLocation, getLocationOnScreen, getMouseListeners, getMouseMotionListeners, getMousePosition, getMouseWheelListeners, getName, getParent, getPropertyChangeListeners, getPropertyChangeListeners, getSize, getToolkit, getTreeLock, gotFocus, handleEvent, hasFocus, imageUpdate, inside, isBackgroundSet, isCursorSet, isDisplayable, isEnabled, isFocusable, isFocusOwner, isFocusTraversable, isFontSet, isForegroundSet, isLightweight, isMaximumSizeSet, isMinimumSizeSet, isPreferredSizeSet, isShowing, isValid, isVisible, keyDown, keyUp, list, list, list, location, lostFocus, mouseDown, mouseDrag, mouseEnter, mouseExit, mouseMove, mouseUp, move, nextFocus, paintAll, postEvent, prepareImage, prepareImage, processComponentEvent, processFocusEvent, processHierarchyBoundsEvent, processHierarchyEvent, processInputMethodEvent, processMouseWheelEvent, remove, removeComponentListener, removeFocusListener, removeHierarchyBoundsListener, removeHierarchyListener, removeInputMethodListener, removeKeyListener, removeMouseListener, removeMouseMotionListener, removeMouseWheelListener, removePropertyChangeListener, removePropertyChangeListener, repaint, repaint, repaint, requestFocus, requestFocus, requestFocusInWindow, resize, resize, setBounds, setBounds, setComponentOrientation, setCursor, setDropTarget, setFocusable, setFocusTraversalKeysEnabled, setIgnoreRepaint, setLocale, setLocation, setLocation, setMixingCutoutShape, setName, setSize, setSize, show, show, size, toString, transferFocus, transferFocusBackward, transferFocusUpCycle

Methods declared in class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Details

SELECTION_MODEL_PROPERTY

public static final String SELECTION_MODEL_PROPERTY

The selection model property name.

See Also:

• Constant Field Values

PREVIEW_PANEL_PROPERTY

public static final String PREVIEW_PANEL_PROPERTY

The preview panel property name.

See Also:

• Constant Field Values

CHOOSER_PANELS_PROPERTY

public static final String CHOOSER_PANELS_PROPERTY

The chooserPanel array property name.

See Also:

• Constant Field Values

accessibleContext

protected AccessibleContext accessibleContext

The accessible context.

Constructor Details

JColorChooser

public JColorChooser()

Creates a color chooser pane with an initial color of white.

JColorChooser

public JColorChooser(Color initialColor)

Creates a color chooser pane with the specified initial color.

Parameters:

initialColor - the initial color set in the chooser

JColorChooser

public JColorChooser(ColorSelectionModel model)

Creates a color chooser pane with the specified ColorSelectionModel.

Parameters:

model - the ColorSelectionModel to be used

Method Details

showDialog

public static Color showDialog(Component component,
 String title,
 Color initialColor)
                        throws HeadlessException

Shows a modal color-chooser dialog and blocks until the dialog is hidden. If the user presses the "OK" button, then this method hides/disposes the dialog and returns the selected color. If the user presses the "Cancel" button or closes the dialog without pressing "OK", then this method hides/disposes the dialog and returns null.

Parameters:

component - the parent Component for the dialog

title - the String containing the dialog's title

initialColor - the initial Color set when the color-chooser is shown

Returns:

the selected color or null if the user opted out

Throws:

HeadlessException - if GraphicsEnvironment.isHeadless() returns true.

See Also:

• GraphicsEnvironment.isHeadless()

showDialog

public static Color showDialog(Component component,
 String title,
 Color initialColor,
 boolean colorTransparencySelectionEnabled)
                        throws HeadlessException

Shows a modal color-chooser dialog and blocks until the dialog is hidden. If the user presses the "OK" button, then this method hides/disposes the dialog and returns the selected color. If the user presses the "Cancel" button or closes the dialog without pressing "OK", then this method hides/disposes the dialog and returns null.

Parameters:

component - the parent Component for the dialog

title - the String containing the dialog's title

initialColor - the initial Color set when the color-chooser is shown

colorTransparencySelectionEnabled - true if the transparency of a color can be selected

Returns:

the selected color or null if the user opted out

Throws:

HeadlessException - if GraphicsEnvironment.isHeadless() returns true.

See Also:

• GraphicsEnvironment.isHeadless()

createDialog

public static JDialog createDialog(Component c,
 String title,
 boolean modal,
 JColorChooser chooserPane,
 ActionListener okListener,
 ActionListener cancelListener)
                            throws HeadlessException

Creates and returns a new dialog containing the specified ColorChooser pane along with "OK", "Cancel", and "Reset" buttons. If the "OK" or "Cancel" buttons are pressed, the dialog is automatically hidden (but not disposed). If the "Reset" button is pressed, the color-chooser's color will be reset to the color which was set the last time show was invoked on the dialog and the dialog will remain showing.

Parameters:

c - the parent component for the dialog

title - the title for the dialog

modal - a boolean. When true, the remainder of the program is inactive until the dialog is closed.

chooserPane - the color-chooser to be placed inside the dialog

okListener - the ActionListener invoked when "OK" is pressed

cancelListener - the ActionListener invoked when "Cancel" is pressed

Returns:

a new dialog containing the color-chooser pane

Throws:

HeadlessException - if GraphicsEnvironment.isHeadless() returns true.

See Also:

• GraphicsEnvironment.isHeadless()

getUI

public ColorChooserUI getUI()

Returns the L&F object that renders this component.

Overrides:

getUI in class JComponent

Returns:

the ColorChooserUI object that renders this component

setUI

@BeanProperty(hidden=true,
              description="The UI object that implements the color chooser's LookAndFeel.")
public void setUI(ColorChooserUI ui)

Sets the L&F object that renders this component.

Parameters:

ui - the ColorChooserUI L&F object

See Also:

• UIDefaults.getUI(javax.swing.JComponent)

updateUI

public void updateUI()

Notification from the UIManager that the L&F has changed. Replaces the current UI object with the latest version from the UIManager.

Overrides:

updateUI in class JComponent

See Also:

• JComponent.updateUI()

getUIClassID

@BeanProperty(bound=false)
public String getUIClassID()

Returns the name of the L&F class that renders this component.

Overrides:

getUIClassID in class JComponent

Returns:

the string "ColorChooserUI"

See Also:

• JComponent.getUIClassID()
• UIDefaults.getUI(javax.swing.JComponent)

getColor

public Color getColor()

Gets the current color value from the color chooser. By default, this delegates to the model.

Returns:

the current color value of the color chooser

setColor

@BeanProperty(bound=false,
              description="The current color the chooser is to display.")
public void setColor(Color color)

Sets the current color of the color chooser to the specified color. The ColorSelectionModel will fire a ChangeEvent

Parameters:

color - the color to be set in the color chooser

See Also:

• Container.addPropertyChangeListener(java.beans.PropertyChangeListener)

setColor

public void setColor(int r,
 int g,
 int b)

Sets the current color of the color chooser to the specified RGB color. Note that the values of red, green, and blue should be between the numbers 0 and 255, inclusive.

Parameters:

r - an int specifying the amount of Red

g - an int specifying the amount of Green

b - an int specifying the amount of Blue

Throws:

IllegalArgumentException - if r,g,b values are out of range

See Also:

• Color

setColor

public void setColor(int c)

Sets the current color of the color chooser to the specified color.

Parameters:

c - an integer value that sets the current color in the chooser where the low-order 8 bits specify the Blue value, the next 8 bits specify the Green value, and the 8 bits above that specify the Red value.

setDragEnabled

@BeanProperty(bound=false,
              description="Determines whether automatic drag handling is enabled.")
public void setDragEnabled(boolean b)

Sets the dragEnabled property, which must be true to enable automatic drag handling (the first part of drag and drop) on this component. The transferHandler property needs to be set to a non-null value for the drag to do anything. The default value of the dragEnabled property is false.

When automatic drag handling is enabled, most look and feels begin a drag-and-drop operation when the user presses the mouse button over the preview panel. Some look and feels might not support automatic drag and drop; they will ignore this property. You can work around such look and feels by modifying the component to directly call the exportAsDrag method of a TransferHandler.

Parameters:

b - the value to set the dragEnabled property to

Throws:

HeadlessException - if b is true and GraphicsEnvironment.isHeadless() returns true

Since:

1.4

See Also:

• GraphicsEnvironment.isHeadless()
• getDragEnabled()
• JComponent.setTransferHandler(javax.swing.TransferHandler)
• TransferHandler

getDragEnabled

public boolean getDragEnabled()

Gets the value of the dragEnabled property.

Returns:

the value of the dragEnabled property

Since:

1.4

See Also:

• setDragEnabled(boolean)

setPreviewPanel

@BeanProperty(hidden=true,
              description="The UI component which displays the current color.")
public void setPreviewPanel(JComponent preview)

Sets the current preview panel. This will fire a PropertyChangeEvent for the property named "previewPanel".

Parameters:

preview - the JComponent which displays the current color

See Also:

• Container.addPropertyChangeListener(java.beans.PropertyChangeListener)

getPreviewPanel

public JComponent getPreviewPanel()

Returns the preview panel that shows a chosen color.

Returns:

a JComponent object -- the preview panel

addChooserPanel

public void addChooserPanel(AbstractColorChooserPanel panel)

Adds a color chooser panel to the color chooser.

Parameters:

panel - the AbstractColorChooserPanel to be added

removeChooserPanel

public AbstractColorChooserPanel removeChooserPanel(AbstractColorChooserPanel panel)

Removes the Color Panel specified.

Parameters:

panel - a string that specifies the panel to be removed

Returns:

the color panel

Throws:

IllegalArgumentException - if panel is not in list of known chooser panels

setChooserPanels

@BeanProperty(hidden=true,
              description="An array of different chooser types.")
public void setChooserPanels(AbstractColorChooserPanel[] panels)

Specifies the Color Panels used to choose a color value.

Parameters:

panels - an array of AbstractColorChooserPanel objects

getChooserPanels

public AbstractColorChooserPanel[] getChooserPanels()

Returns the specified color panels.

Returns:

an array of AbstractColorChooserPanel objects

getSelectionModel

public ColorSelectionModel getSelectionModel()

Returns the data model that handles color selections.

Returns:

a ColorSelectionModel object

setSelectionModel

@BeanProperty(hidden=true,
              description="The model which contains the currently selected color.")
public void setSelectionModel(ColorSelectionModel newModel)

Sets the model containing the selected color.

Parameters:

newModel - the new ColorSelectionModel object

paramString

protected String paramString()

Returns a string representation of this JColorChooser. This method is intended to be used only for debugging purposes, and the content and format of the returned string may vary between implementations. The returned string may be empty but may not be null.

Overrides:

paramString in class JComponent

Returns:

a string representation of this JColorChooser

getAccessibleContext

@BeanProperty(bound=false)
public AccessibleContext getAccessibleContext()

Gets the AccessibleContext associated with this JColorChooser. For color choosers, the AccessibleContext takes the form of an AccessibleJColorChooser. A new AccessibleJColorChooser instance is created if necessary.

Specified by:

getAccessibleContext in interface Accessible

Overrides:

getAccessibleContext in class Component

Returns:

an AccessibleJColorChooser that serves as the AccessibleContext of this JColorChooser