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BasicTableHeaderUI (Java Platform SE 6) - JDK 5 Documentation v6.0, Java 2 SDK 英文文档

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javax.swing.plaf.basic
Class BasicTableHeaderUI

java.lang.Object
  extended by javax.swing.plaf.ComponentUI
      extended by javax.swing.plaf.TableHeaderUI
          extended by javax.swing.plaf.basic.BasicTableHeaderUI

public class BasicTableHeaderUI
extends TableHeaderUI

BasicTableHeaderUI implementation

Nested Class Summary
 class BasicTableHeaderUI.MouseInputHandler
          This inner class is marked "public" due to a compiler bug.
 
Field Summary
protected  JTableHeader header
          The JTableHeader that is delegating the painting to this UI.
protected  MouseInputListener mouseInputListener
           
protected  CellRendererPane rendererPane
           
 
Constructor Summary
BasicTableHeaderUI()
           
 
Method Summary
protected  MouseInputListener createMouseInputListener()
          Creates the mouse listener for the JTableHeader.
static ComponentUI createUI(JComponent h)
           
 int getBaseline(JComponent c, int width, int height)
          Returns the baseline.
 Dimension getMaximumSize(JComponent c)
          Return the maximum size of the header.
 Dimension getMinimumSize(JComponent c)
          Return the minimum size of the header.
 Dimension getPreferredSize(JComponent c)
          Return the preferred size of the header.
protected  int getRolloverColumn()
          Returns the index of the column header over which the mouse currently is.
protected  void installDefaults()
          Initialize JTableHeader properties, e.g.
protected  void installKeyboardActions()
          Register all keyboard actions on the JTableHeader.
protected  void installListeners()
          Attaches listeners to the JTableHeader.
 void installUI(JComponent c)
          Configures the specified component appropriate for the look and feel.
 void paint(Graphics g, JComponent c)
          Paints the specified component appropriate for the look and feel.
protected  void rolloverColumnUpdated(int oldColumn, int newColumn)
          This method gets called every time the rollover column in the table header is updated.
protected  void uninstallDefaults()
           
protected  void uninstallKeyboardActions()
          Unregisters default key actions.
protected  void uninstallListeners()
           
 void uninstallUI(JComponent c)
          Reverses configuration which was done on the specified component during installUI.
 
Methods inherited from class javax.swing.plaf.ComponentUI
contains, getAccessibleChild, getAccessibleChildrenCount, getBaselineResizeBehavior, update
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

header

protected JTableHeader header
The JTableHeader that is delegating the painting to this UI.

rendererPane

protected CellRendererPane rendererPane

mouseInputListener

protected MouseInputListener mouseInputListener
Constructor Detail

BasicTableHeaderUI

public BasicTableHeaderUI()
Method Detail

createMouseInputListener

protected MouseInputListener createMouseInputListener()
Creates the mouse listener for the JTableHeader.

createUI

public static ComponentUI createUI(JComponent h)

installUI

public void installUI(JComponent c)
Description copied from class: ComponentUI
Configures the specified component appropriate 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 any 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 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()

installDefaults

protected void installDefaults()
Initialize JTableHeader properties, e.g. font, foreground, and background. The font, foreground, and background properties are only set if their current value is either null or a UIResource, other properties are set if the current value is null.

See Also:
installUI(javax.swing.JComponent)

installListeners

protected void installListeners()
Attaches listeners to the JTableHeader.

installKeyboardActions

protected void installKeyboardActions()
Register all keyboard actions on the JTableHeader.

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 ComponentUI
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()

uninstallListeners

protected void uninstallListeners()

uninstallKeyboardActions

protected void uninstallKeyboardActions()
Unregisters default key actions.

getRolloverColumn

protected int getRolloverColumn()
Returns the index of the column header over which the mouse currently is. When the mouse is not over the table header, -1 is returned.

Returns:
the index of the current rollover column
Since:
1.6
See Also:
rolloverColumnUpdated(int, int)

rolloverColumnUpdated

protected void rolloverColumnUpdated(int oldColumn,
                                     int newColumn)
This method gets called every time the rollover column in the table header is updated. Every look and feel supporting rollover effect in table header should override this method and repaint the header.

Parameters:
oldColumn - the index of the previous rollover column or -1 if the mouse was not over a column
newColumn - the index of the new rollover column or -1 if the mouse is not over a column
Since:
1.6
See Also:
getRolloverColumn(), JTableHeader.getHeaderRect(int)

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)

paint

public void paint(Graphics g,
                  JComponent c)
Description copied from class: ComponentUI
Paints the specified component appropriate for the look and feel. This method is invoked from the ComponentUI.update method when the specified component is being painted. Subclasses should override this method and use the specified Graphics object to render the content of the component.

Overrides:
paint in class ComponentUI
Parameters:
g - the Graphics context in which to paint
c - the component being painted; this argument is often ignored, but might be used if the UI object is stateless and shared by multiple components
See Also:
ComponentUI.update(java.awt.Graphics, javax.swing.JComponent)

getMinimumSize

public Dimension getMinimumSize(JComponent c)
Return the minimum size of the header. The minimum width is the sum of the minimum widths of each column (plus inter-cell spacing).

Overrides:
getMinimumSize in class ComponentUI
Parameters:
c - the component whose minimum size is being queried; this argument is often ignored, but might be used if the UI object is stateless and shared by multiple components
Returns:
a Dimension object or null
See Also:
JComponent.getMinimumSize(), LayoutManager.minimumLayoutSize(java.awt.Container), ComponentUI.getPreferredSize(javax.swing.JComponent)

getPreferredSize

public Dimension getPreferredSize(JComponent c)
Return the preferred size of the header. The preferred height is the maximum of the preferred heights of all of the components provided by the header renderers. The preferred width is the sum of the preferred widths of each column (plus inter-cell spacing).

Overrides:
getPreferredSize in class ComponentUI
Parameters:
c - the component whose preferred size is being queried; this argument is often ignored, but might be used if the UI object is stateless and shared by multiple components
See Also:
JComponent.getPreferredSize(), LayoutManager.preferredLayoutSize(java.awt.Container)

getMaximumSize

public Dimension getMaximumSize(JComponent c)
Return the maximum size of the header. The maximum width is the sum of the maximum widths of each column (plus inter-cell spacing).

Overrides:
getMaximumSize in class ComponentUI
Parameters:
c - the component whose maximum size is being queried; this argument is often ignored, but might be used if the UI object is stateless and shared by multiple components
Returns:
a Dimension object or null
See Also:
JComponent.getMaximumSize(), LayoutManager2.maximumLayoutSize(java.awt.Container)
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For further API reference and developer documentation, see Java SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.

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