/**
* 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);
}
/**
* Installs some default values for the given scrollpane. The free standing property is disabled
* here.
*
* @param mainColor The reference of the scrollpane to install its default values.
*/
public void installUI(JComponent c) {
super.installUI(c);
// Note: It never happened before Java 1.5 that scrollbar is null
JScrollBar sb = scrollpane.getHorizontalScrollBar();
if (sb != null) {
sb.putClientProperty(MetalScrollBarUI.FREE_STANDING_PROP, Boolean.FALSE);
}
sb = scrollpane.getVerticalScrollBar();
if (sb != null) {
sb.putClientProperty(MetalScrollBarUI.FREE_STANDING_PROP, Boolean.FALSE);
}
}