org.jdesktop.swingx.plaf
Class PromptTextUI

java.lang.Object
  javax.swing.plaf.ComponentUI
      javax.swing.plaf.TextUI
          org.jdesktop.swingx.plaf.PromptTextUI

Direct Known Subclasses:

PromptTextAreaUI, PromptTextFieldUI

public abstract class PromptTextUI
extends TextUI

Abstract TextUI class that delegates most work to another TextUI and additionally renders a prompt text as specified in the JTextComponents client properties by PromptSupport.

Subclasses of this class must provide a prompt component used for rendering the prompt text.

Author:

Peter Weishapl

Nested Class Summary

protected class

PromptTextUI.PainterHighlighter

Field Summary

protected TextUI	delegate Delegate the hard work to this object.
protected JTextComponent	promptComponent This component ist painted when rendering the prompt text.

Constructor Summary

PromptTextUI(TextUI delegate)
Creates a new PromptTextUI which delegates most work to another TextUI.

Method Summary

boolean	contains(JComponent c, int x, int y)
protected abstract JTextComponent	createPromptComponent() Creates a component which should be used to render the prompt text.
void	damageRange(JTextComponent t, int p0, int p1)
void	damageRange(JTextComponent t, int p0, int p1, Position.Bias firstBias, Position.Bias secondBias)
boolean	equals(Object obj)
Accessible	getAccessibleChild(JComponent c, int i)
int	getAccessibleChildrenCount(JComponent c)
int	getBaseline(JComponent c, int width, int height) Tries to call ComponentUI#getBaseline(int, int) on the delegate via Reflection.
EditorKit	getEditorKit(JTextComponent t)
Dimension	getMaximumSize(JComponent c)
Dimension	getMinimumSize(JComponent c)
int	getNextVisualPositionFrom(JTextComponent t, int pos, Position.Bias b, int direction, Position.Bias[] biasRet)
Dimension	getPreferredSize(JComponent c) When shouldPaintPrompt(JTextComponent) returns true, the prompt component is retrieved by calling getPromptComponent(JTextComponent) and it's preferred size is returned.
JTextComponent	getPromptComponent(JTextComponent txt) Creates a label component, if none has already been created.
View	getRootView(JTextComponent t)
String	getToolTipText(JTextComponent t, Point pt)
int	hashCode()
void	installUI(JComponent c) Calls TextUI#installUI(JComponent) on the delegate and installs a focus listener on c which repaints the component when it gains or loses the focus.
Rectangle	modelToView(JTextComponent t, int pos) Calls #modelToView(JTextComponent, int, Bias) with Position.Bias.Forward.
Rectangle	modelToView(JTextComponent t, int pos, Position.Bias bias) Delegate when shouldPaintPrompt(JTextComponent) returns false.
void	paint(Graphics g, JComponent c) Delegates painting when shouldPaintPrompt(JTextComponent) returns false.
protected void	paintPromptComponent(Graphics g, JTextComponent txt)
boolean	shouldPaintPrompt(JTextComponent txt) Returns if the prompt or the text field should be painted, depending on the state of txt.
String	toString()
void	uninstallUI(JComponent c) Delegates, then uninstalls the focus listener.
void	update(Graphics g, JComponent c) Calls super.update(Graphics, JComponent), which in turn calls the paint method of this object.
int	viewToModel(JTextComponent t, Point pt)
int	viewToModel(JTextComponent t, Point pt, Position.Bias[] biasReturn)

Methods inherited from class javax.swing.plaf.ComponentUI

createUI, getBaselineResizeBehavior

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

delegate

protected final TextUI delegate

Delegate the hard work to this object.

promptComponent

protected JTextComponent promptComponent

This component ist painted when rendering the prompt text.

Constructor Detail

PromptTextUI

public PromptTextUI(TextUI delegate)

Creates a new PromptTextUI which delegates most work to another TextUI.

Parameters:

delegate -

Method Detail

createPromptComponent

protected abstract JTextComponent createPromptComponent()

Creates a component which should be used to render the prompt text.

Returns:

installUI

public void installUI(JComponent c)

Calls TextUI#installUI(JComponent) on the delegate and installs a focus listener on c which repaints the component when it gains or loses the focus.

Overrides:

installUI in class ComponentUI

uninstallUI

public void uninstallUI(JComponent c)

Delegates, then uninstalls the focus listener.

Overrides:

uninstallUI in class ComponentUI

getPromptComponent

public JTextComponent getPromptComponent(JTextComponent txt)

Creates a label component, if none has already been created. Sets the prompt components properties to reflect the given JTextComponents properties and returns it.

Parameters:

txt -

Returns:

the adjusted prompt component

getPreferredSize

public Dimension getPreferredSize(JComponent c)

When shouldPaintPrompt(JTextComponent) returns true, the prompt component is retrieved by calling getPromptComponent(JTextComponent) and it's preferred size is returned. Otherwise supergetPreferredSize(JComponent) is called.

Overrides:

getPreferredSize in class ComponentUI

paint

public void paint(Graphics g,
                  JComponent c)

Delegates painting when shouldPaintPrompt(JTextComponent) returns false. Otherwise the prompt component is retrieved by calling getPromptComponent(JTextComponent) and painted. Then the caret of the given text component is painted.

Overrides:

paint in class ComponentUI

paintPromptComponent

protected void paintPromptComponent(Graphics g,
                                    JTextComponent txt)

shouldPaintPrompt

public boolean shouldPaintPrompt(JTextComponent txt)

Returns if the prompt or the text field should be painted, depending on the state of txt.

Parameters:

txt -

Returns:

true when txt contains not text, otherwise false

update

public void update(Graphics g,
                   JComponent c)

Calls super.update(Graphics, JComponent), which in turn calls the paint method of this object.

Overrides:

update in class ComponentUI

modelToView

public Rectangle modelToView(JTextComponent t,
                             int pos,
                             Position.Bias bias)
                      throws BadLocationException

Delegate when shouldPaintPrompt(JTextComponent) returns false. Otherwise get the prompt component's UI and delegate to it. This ensures that the Caret is painted on the correct position (this is important when the text is centered, so that the caret will not be painted inside the label text)

Specified by:

modelToView in class TextUI

Throws:

BadLocationException

modelToView

public Rectangle modelToView(JTextComponent t,
                             int pos)
                      throws BadLocationException

Calls #modelToView(JTextComponent, int, Bias) with Position.Bias.Forward.

Specified by:

modelToView in class TextUI

Throws:

BadLocationException

contains

public boolean contains(JComponent c,
                        int x,
                        int y)

Overrides:

contains in class ComponentUI

damageRange

public void damageRange(JTextComponent t,
                        int p0,
                        int p1,
                        Position.Bias firstBias,
                        Position.Bias secondBias)

Specified by:

damageRange in class TextUI

damageRange

public void damageRange(JTextComponent t,
                        int p0,
                        int p1)

Specified by:

damageRange in class TextUI

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

getAccessibleChild

public Accessible getAccessibleChild(JComponent c,
                                     int i)

Overrides:

getAccessibleChild in class ComponentUI

getAccessibleChildrenCount

public int getAccessibleChildrenCount(JComponent c)

Overrides:

getAccessibleChildrenCount in class ComponentUI

getEditorKit

public EditorKit getEditorKit(JTextComponent t)

Specified by:

getEditorKit in class TextUI

getMaximumSize

public Dimension getMaximumSize(JComponent c)

Overrides:

getMaximumSize in class ComponentUI

getMinimumSize

public Dimension getMinimumSize(JComponent c)

Overrides:

getMinimumSize in class ComponentUI

getNextVisualPositionFrom

public int getNextVisualPositionFrom(JTextComponent t,
                                     int pos,
                                     Position.Bias b,
                                     int direction,
                                     Position.Bias[] biasRet)
                              throws BadLocationException

Specified by:

getNextVisualPositionFrom in class TextUI

Throws:

BadLocationException

getRootView

public View getRootView(JTextComponent t)

Specified by:

getRootView in class TextUI

getToolTipText

public String getToolTipText(JTextComponent t,
                             Point pt)

Overrides:

getToolTipText in class TextUI

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object

viewToModel

public int viewToModel(JTextComponent t,
                       Point pt,
                       Position.Bias[] biasReturn)

Specified by:

viewToModel in class TextUI

viewToModel

public int viewToModel(JTextComponent t,
                       Point pt)

Specified by:

viewToModel in class TextUI

getBaseline

public int getBaseline(JComponent c,
                       int width,
                       int height)

Tries to call ComponentUI#getBaseline(int, int) on the delegate via Reflection. Workaround to maintain compatibility with Java 5. Ideally we should also override ComponentUI.getBaselineResizeBehavior(JComponent), but that's impossible since the Component.BaselineResizeBehavior class, which does not exist in Java 5, is involved.

Overrides:

getBaseline in class ComponentUI

Returns:

the baseline, or -2 if getBaseline could not be invoked on the delegate.