/**
* 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.
*
* @param c - the component to install the ui on
*/
public void installUI(JComponent c) {
super.installUI(c);
JScrollBar hsb = scrollpane.getHorizontalScrollBar();
hsb.putClientProperty(MetalScrollBarUI.FREE_STANDING_PROP, Boolean.FALSE);
JScrollBar vsb = scrollpane.getVerticalScrollBar();
vsb.putClientProperty(MetalScrollBarUI.FREE_STANDING_PROP, Boolean.FALSE);
}
/**
* 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.
*
* @param c - the component to uninstall the ui on
*/
public void uninstallUI(JComponent c) {
JScrollBar hsb = scrollpane.getHorizontalScrollBar();
hsb.putClientProperty(MetalScrollBarUI.FREE_STANDING_PROP, null);
JScrollBar vsb = scrollpane.getVerticalScrollBar();
vsb.putClientProperty(MetalScrollBarUI.FREE_STANDING_PROP, null);
super.uninstallUI(c);
}
/** {@inheritDoc} */
@Override
protected void uninstallListeners(JComponent c) {
super.uninstallListeners(c);
c.removePropertyChangeListener(this);
if (viewportViewFocusHandler != null) {
JViewport viewport = ((JScrollPane) c).getViewport();
viewport.removeContainerListener(viewportViewFocusHandler);
if (viewport.getView() != null) {
viewport.getView().removeFocusListener(viewportViewFocusHandler);
}
viewportViewFocusHandler = null;
}
}
/** {@inheritDoc} */
@Override
protected void installListeners(JScrollPane c) {
super.installListeners(c);
c.addPropertyChangeListener(this);
if (UIManager.getBoolean("ScrollPane.useChildTextComponentFocus")) {
viewportViewFocusHandler = new ViewportViewFocusHandler();
c.getViewport().addContainerListener(viewportViewFocusHandler);
Component view = c.getViewport().getView();
if (view instanceof JTextComponent) {
view.addFocusListener(viewportViewFocusHandler);
}
}
}
/**
* Uninstalls listeners on scrollPane
*
* @param scrollPane - the component to uninstall the listeners on
*/
public void uninstallListeners(JScrollPane scrollPane) {
super.uninstallListeners(scrollPane);
}