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javax.swing.plaf.basic
Class BasicSpinnerUI


java.lang.Object
  extended by javax.swing.plaf.ComponentUI
      extended by javax.swing.plaf.SpinnerUI
          extended by javax.swing.plaf.basic.BasicSpinnerUI

public class BasicSpinnerUI
extends SpinnerUI

The default Spinner UI delegate.

Since:
1.4

Field Summary
protected   JSpinner spinner
          The spinner that we're a UI delegate for.
 
Constructor Summary
BasicSpinnerUI ()
           
 
Method Summary
protected   JComponent createEditor ()
          This method is called by installUI to get the editor component of the JSpinner.
protected   LayoutManager createLayout ()
          Create a LayoutManager that manages the editor, nextButton, and previousButton children of the JSpinner.
protected   Component createNextButton ()
          Create a component that will replace the spinner models value with the object returned by spinner.getNextValue.
protected   Component createPreviousButton ()
          Create a component that will replace the spinner models value with the object returned by spinner.getPreviousValue.
protected   PropertyChangeListener createPropertyChangeListener ()
          Create a PropertyChangeListener that can be added to the JSpinner itself.
static  ComponentUI createUI ( JComponent  c)
          Returns a new instance of BasicSpinnerUI.
 int getBaseline ( JComponent
          Returns the baseline.
  Component.BaselineResizeBehavior getBaselineResizeBehavior ( JComponent
          Returns an enum indicating how the baseline of the component changes as the size changes.
protected  void installDefaults ()
          Initialize the JSpinner border, foreground, and background, properties based on the corresponding "Spinner.*" properties from defaults table.
protected  void installKeyboardActions ()
          Installs the keyboard Actions onto the JSpinner.
protected  void installListeners ()
          Initializes PropertyChangeListener with a shared object that delegates interesting PropertyChangeEvents to protected methods.
protected  void installNextButtonListeners ( Component  c)
          Installs the necessary listeners on the next button, c, to update the JSpinner in response to a user gesture.
protected  void installPreviousButtonListeners ( Component  c)
          Installs the necessary listeners on the previous button, c, to update the JSpinner in response to a user gesture.
 void installUI ( JComponent  c)
          Calls installDefaults, installListeners, and then adds the components returned by createNextButton, createPreviousButton, and createEditor.
protected  void replaceEditor ( JComponent  oldEditor, JComponent  newEditor)
          Called by the PropertyChangeListener when the JSpinner editor property changes.
protected  void uninstallDefaults ()
          Sets the JSpinner's layout manager to null.
protected  void uninstallListeners ()
          Removes the PropertyChangeListener added by installListeners.
 void uninstallUI ( JComponent  c)
          Calls uninstallDefaults, uninstallListeners, and then removes all of the spinners children.
 
Methods inherited from class javax.swing.plaf. ComponentUI
contains , getAccessibleChild , getAccessibleChildrenCount , getMaximumSize , getMinimumSize , getPreferredSize , paint , update
 
Methods inherited from class java.lang. Object
clone , equals , finalize , getClass , hashCode , notify , notifyAll , toString , wait , wait , wait
 

Field Detail

spinner


protected JSpinner spinner
The spinner that we're a UI delegate for. Initialized by the installUI method, and reset to null by uninstallUI.

See Also:
installUI(javax.swing.JComponent) , uninstallUI(javax.swing.JComponent)
Constructor Detail

BasicSpinnerUI


public BasicSpinnerUI()
Method Detail

createUI


public static ComponentUI createUI(JComponent c)
Returns a new instance of BasicSpinnerUI. SpinnerListUI delegates are allocated one per JSpinner.

Parameters:
c - the JSpinner (not used)
Returns:
a new BasicSpinnerUI object
See Also:
ComponentUI.createUI(javax.swing.JComponent)

installUI


public void installUI(JComponent c)
Calls installDefaults, installListeners, and then adds the components returned by createNextButton, createPreviousButton, and createEditor.

Overrides:
installUI in class ComponentUI
Parameters:
c - the JSpinner
See Also:
installDefaults() , installListeners() , createNextButton() , createPreviousButton() , createEditor()

uninstallUI


public void uninstallUI(JComponent c)
Calls uninstallDefaults, uninstallListeners, and then removes all of the spinners children.

Overrides:
uninstallUI in class ComponentUI
Parameters:
c - the JSpinner (not used)
See Also:
ComponentUI.installUI(javax.swing.JComponent) , JComponent.updateUI()

installListeners


protected void installListeners()
Initializes PropertyChangeListener with a shared object that delegates interesting PropertyChangeEvents to protected methods.

This method is called by installUI.

See Also:
replaceEditor(javax.swing.JComponent, javax.swing.JComponent) , uninstallListeners()

uninstallListeners


protected void uninstallListeners()
Removes the PropertyChangeListener added by installListeners.

This method is called by uninstallUI.

See Also:
installListeners()

installDefaults


protected void installDefaults()
Initialize the JSpinner border, foreground, and background, properties based on the corresponding "Spinner.*" properties from defaults table. The JSpinners layout is set to the value returned by createLayout. This method is called by installUI.

See Also:
uninstallDefaults() , installUI(javax.swing.JComponent) , createLayout() , LookAndFeel.installBorder(javax.swing.JComponent, java.lang.String) , LookAndFeel.installColors(javax.swing.JComponent, java.lang.String, java.lang.String)

uninstallDefaults


protected void uninstallDefaults()
Sets the JSpinner's layout manager to null. This method is called by uninstallUI.

See Also:
installDefaults() , uninstallUI(javax.swing.JComponent)

installNextButtonListeners


protected void installNextButtonListeners(Component c)
Installs the necessary listeners on the next button, c, to update the JSpinner in response to a user gesture.

Parameters:
c - Component to install the listeners on
Throws:
NullPointerException - if c is null.
Since:
1.5
See Also:
createNextButton()

installPreviousButtonListeners


protected void installPreviousButtonListeners(Component c)
Installs the necessary listeners on the previous button, c, to update the JSpinner in response to a user gesture.

Parameters:
c - Component to install the listeners on.
Throws:
NullPointerException - if c is null.
Since:
1.5
See Also:
createPreviousButton()

createLayout


protected LayoutManager createLayout()
Create a LayoutManager that manages the editor, nextButton, and previousButton children of the JSpinner. These three children must be added with a constraint that identifies their role: "Editor", "Next", and "Previous". The default layout manager can handle the absence of any of these children.

Returns:
a LayoutManager for the editor, next button, and previous button.
See Also:
createNextButton() , createPreviousButton() , createEditor()

createPropertyChangeListener


protected PropertyChangeListener createPropertyChangeListener()
Create a PropertyChangeListener that can be added to the JSpinner itself. Typically, this listener will call replaceEditor when the "editor" property changes, since it's the SpinnerUI's responsibility to add the editor to the JSpinner (and remove the old one). This method is called by installListeners.

Returns:
A PropertyChangeListener for the JSpinner itself
See Also:
installListeners()

createPreviousButton


protected Component createPreviousButton()
Create a component that will replace the spinner models value with the object returned by spinner.getPreviousValue. By default the previousButton is a JButton. This method invokes installPreviousButtonListeners to install the necessary listeners to update the JSpinner's model in response to a user gesture. If a previousButton isn't needed (in a subclass) then override this method to return null.

Returns:
a component that will replace the spinners model with the next value in the sequence, or null
See Also:
installUI(javax.swing.JComponent) , createNextButton() , installPreviousButtonListeners(java.awt.Component)

createNextButton


protected Component createNextButton()
Create a component that will replace the spinner models value with the object returned by spinner.getNextValue. By default the nextButton is a JButton who's ActionListener updates it's JSpinner ancestors model. If a nextButton isn't needed (in a subclass) then override this method to return null.

Returns:
a component that will replace the spinners model with the next value in the sequence, or null
See Also:
installUI(javax.swing.JComponent) , createPreviousButton() , installNextButtonListeners(java.awt.Component)

createEditor


protected JComponent createEditor()
This method is called by installUI to get the editor component of the JSpinner. By default it just returns JSpinner.getEditor(). Subclasses can override createEditor to return a component that contains the spinner's editor or null, if they're going to handle adding the editor to the JSpinner in an installUI override.

Typically this method would be overridden to wrap the editor with a container with a custom border, since one can't assume that the editors border can be set directly.

The replaceEditor method is called when the spinners editor is changed with JSpinner.setEditor. If you've overriden this method, then you'll probably want to override replaceEditor as well.

Returns:
the JSpinners editor JComponent, spinner.getEditor() by default
See Also:
installUI(javax.swing.JComponent) , replaceEditor(javax.swing.JComponent, javax.swing.JComponent) , JSpinner.getEditor()

replaceEditor


protected void replaceEditor(JComponent oldEditor,
                             JComponent newEditor)
Called by the PropertyChangeListener when the JSpinner editor property changes. It's the responsibility of this method to remove the old editor and add the new one. By default this operation is just: 
 spinner.remove(oldEditor);
 spinner.add(newEditor, "Editor");
The implementation of replaceEditor should be coordinated with the createEditor method.

See Also:
createEditor() , createPropertyChangeListener()

installKeyboardActions


protected void installKeyboardActions()
Installs the keyboard Actions onto the JSpinner.

Since:
1.5

getBaseline 


 
public int getBaseline ( JComponent c,
 int width,
 int height)
Returns the baseline.

Overrides:
getBaseline in class ComponentUI
Parameters:
c - JComponent baseline is being requested for
width - the width to get the baseline for
height - the height to get the baseline for
Returns:
baseline or a value < 0 indicating there is no reasonable baseline
Throws:
NullPointerException - if c is null
IllegalArgumentException - if width or height is < 0
Since:
1.6
See Also:
JComponent.getBaseline(int, int)

getBaselineResizeBehavior 


 
public Component.BaselineResizeBehaviorgetBaselineResizeBehavior ( JComponent c)
Returns an enum indicating how the baseline of the component changes as the size changes.

Overrides:
getBaselineResizeBehavior in class ComponentUI
Parameters:
c - JComponent to return baseline resize behavior for
Returns:
an enum indicating how the baseline changes as the component size changes
Throws:
NullPointerException - if c is null
Since:
1.6
See Also:
JComponent.getBaseline(int, int)