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JavaTM 2 Platform Std. Ed. v1.4.2 |
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java.lang.Objectjavax.swing.plaf.ComponentUI
javax.swing.plaf.ScrollPaneUI
javax.swing.plaf.basic.BasicScrollPaneUI
A default L&F implementation of ScrollPaneUI.
| Nested Class Summary | |
class |
BasicScrollPaneUI.HSBChangeListener
Horizontal scrollbar listener. |
protected class |
BasicScrollPaneUI.MouseWheelHandler
MouseWheelHandler is an inner class which implements the MouseWheelListener interface. |
class |
BasicScrollPaneUI.PropertyChangeHandler
|
class |
BasicScrollPaneUI.ViewportChangeHandler
Listener for viewport events. |
class |
BasicScrollPaneUI.VSBChangeListener
Vertical scrollbar listener. |
| Field Summary | |
protected ChangeListener |
hsbChangeListener
|
protected JScrollPane |
scrollpane
|
protected PropertyChangeListener |
spPropertyChangeListener
|
protected ChangeListener |
viewportChangeListener
|
protected ChangeListener |
vsbChangeListener
|
| Constructor Summary | |
BasicScrollPaneUI()
|
|
| Method Summary | |
protected ChangeListener |
createHSBChangeListener()
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protected MouseWheelListener |
createMouseWheelListener()
Creates an instance of MouseWheelListener, which is added to the JScrollPane by installUI(). |
protected PropertyChangeListener |
createPropertyChangeListener()
Creates an instance of PropertyChangeListener that's added to the JScrollPane by installUI(). |
static ComponentUI |
createUI(JComponent x)
Returns an instance of the UI delegate for the specified component. |
protected ChangeListener |
createViewportChangeListener()
|
protected ChangeListener |
createVSBChangeListener()
|
Dimension |
getMaximumSize(JComponent c)
Returns the specified component's maximum size appropriate for the look and feel. |
Dimension |
getMinimumSize(JComponent c)
Returns the specified component's minimum size appropriate for the look and feel. |
Dimension |
getPreferredSize(JComponent c)
Returns the specified component's preferred size appropriate for the look and feel. |
protected void |
installDefaults(JScrollPane scrollpane)
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protected void |
installKeyboardActions(JScrollPane c)
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protected void |
installListeners(JScrollPane c)
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void |
installUI(JComponent x)
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 |
syncScrollPaneWithViewport()
|
protected void |
uninstallDefaults(JScrollPane c)
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protected void |
uninstallKeyboardActions(JScrollPane c)
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protected void |
uninstallListeners(JComponent c)
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void |
uninstallUI(JComponent c)
Reverses configuration which was done on the specified component during installUI. |
protected void |
updateColumnHeader(PropertyChangeEvent e)
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protected void |
updateRowHeader(PropertyChangeEvent e)
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protected void |
updateScrollBarDisplayPolicy(PropertyChangeEvent e)
|
protected void |
updateViewport(PropertyChangeEvent e)
|
| Methods inherited from class javax.swing.plaf.ComponentUI |
contains, getAccessibleChild, getAccessibleChildrenCount, update |
| Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Field Detail |
protected JScrollPane scrollpane
protected ChangeListener vsbChangeListener
protected ChangeListener hsbChangeListener
protected ChangeListener viewportChangeListener
protected PropertyChangeListener spPropertyChangeListener
| Constructor Detail |
public BasicScrollPaneUI()
| Method Detail |
public static ComponentUI createUI(JComponent x)
ComponentUIcreateUI
method that returns an instance of that UI delegate subclass.
If the UI delegate subclass is stateless, it may return an instance
that is shared by multiple components. If the UI delegate is
stateful, then it should return a new instance per component.
The default implementation of this method throws an error, as it
should never be invoked.
public void paint(Graphics g,
JComponent c)
ComponentUIComponentUI.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.
paint in class ComponentUIg - the Graphics context in which to paintc - the component being painted;
this argument is often ignored,
but might be used if the UI object is stateless
and shared by multiple componentsComponentUI.update(java.awt.Graphics, javax.swing.JComponent)public Dimension getPreferredSize(JComponent c)
ComponentUInull is returned, the preferred
size will be calculated by the component's layout manager instead
(this is the preferred approach for any component with a specific
layout manager installed). The default implementation of this
method returns null.
getPreferredSize in class ComponentUIc - 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
JComponent.getPreferredSize()public Dimension getMinimumSize(JComponent c)
ComponentUInull is returned, the minimum
size will be calculated by the component's layout manager instead
(this is the preferred approach for any component with a specific
layout manager installed). The default implementation of this
method invokes getPreferredSize and returns that value.
getMinimumSize in class ComponentUIc - 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
getPreferredSize(javax.swing.JComponent)public Dimension getMaximumSize(JComponent c)
ComponentUInull is returned, the maximum
size will be calculated by the component's layout manager instead
(this is the preferred approach for any component with a specific
layout manager installed). The default implementation of this
method invokes getPreferredSize and returns that value.
getMaximumSize in class ComponentUIc - 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
JComponent.getMaximumSize(),
LayoutManager2.maximumLayoutSize(java.awt.Container)protected void installDefaults(JScrollPane scrollpane)
protected void installListeners(JScrollPane c)
protected void installKeyboardActions(JScrollPane c)
public void installUI(JComponent x)
ComponentUIComponentUI 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:
LayoutManager on the component if necessary.
PropertyChangeListener on the component in order
to detect and respond to component property changes appropriately.
installUI in class ComponentUIx - the component where this UI delegate is being installedComponentUI.uninstallUI(javax.swing.JComponent),
JComponent.setUI(javax.swing.plaf.ComponentUI),
JComponent.updateUI()protected void uninstallDefaults(JScrollPane c)
protected void uninstallListeners(JComponent c)
protected void uninstallKeyboardActions(JScrollPane c)
public void uninstallUI(JComponent c)
ComponentUIinstallUI. 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:
uninstallUI in class ComponentUIc - 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 componentsComponentUI.installUI(javax.swing.JComponent),
JComponent.updateUI()protected void syncScrollPaneWithViewport()
protected ChangeListener createViewportChangeListener()
protected ChangeListener createHSBChangeListener()
protected ChangeListener createVSBChangeListener()
protected MouseWheelListener createMouseWheelListener()
installUI(javax.swing.JComponent),
BasicScrollPaneUI.MouseWheelHandlerprotected void updateScrollBarDisplayPolicy(PropertyChangeEvent e)
protected void updateViewport(PropertyChangeEvent e)
protected void updateRowHeader(PropertyChangeEvent e)
protected void updateColumnHeader(PropertyChangeEvent e)
protected PropertyChangeListener createPropertyChangeListener()
class MyScrollPaneUI extends BasicScrollPaneUI {
protected PropertyChangeListener createPropertyChangeListener() {
return new MyPropertyChangeListener();
}
public class MyPropertyChangeListener extends PropertyChangeListener {
public void propertyChange(PropertyChangeEvent e) {
if (e.getPropertyName().equals("viewport")) {
// do some extra work when the viewport changes
}
super.propertyChange(e);
}
}
}
PropertyChangeListener,
installUI(javax.swing.JComponent)
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JavaTM 2 Platform Std. Ed. v1.4.2 |
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Copyright 2003 Sun Microsystems, Inc. All rights reserved. Use is subject to license terms. Also see the documentation redistribution policy.