MetalRootPaneUI (Java SE 11 & JDK 11 )
Keywords: javax.swing.plaf.metal.MetalRootPaneUI class

Module java.desktop
Package javax.swing.plaf.metal

## Class MetalRootPaneUI

- java.lang.Object
- - javax.swing.plaf.ComponentUI
  - - javax.swing.plaf.RootPaneUI
    - - javax.swing.plaf.basic.BasicRootPaneUI
      - - javax.swing.plaf.metal.MetalRootPaneUI

- All Implemented Interfaces:
    `PropertyChangeListener`, `EventListener`

      public class MetalRootPaneUI
      extends BasicRootPaneUI

  Provides the metal look and feel implementation of `RootPaneUI`.

  `MetalRootPaneUI` provides support for the `windowDecorationStyle` property of `JRootPane`. `MetalRootPaneUI` does this by way of installing a custom `LayoutManager`, a private `Component` to render the appropriate widgets, and a private `Border`. The `LayoutManager` is always installed, regardless of the value of the `windowDecorationStyle` property, but the `Border` and `Component` are only installed/added if the `windowDecorationStyle` is other than `JRootPane.NONE`.

  Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. As of 1.4, support for long term storage of all JavaBeans™ has been added to the `java.beans` package. Please see `XMLEncoder`.

  Since:
    1.4

- - ### Constructor Summary

    Constructors
    Constructor | Description
    --- | ---
    `MetalRootPaneUI()` |

  - ### Method Summary

    All Methods Static Methods Instance Methods Concrete Methods
    Modifier and Type | Method | Description
    --- | --- | ---
    `static ComponentUI` | `createUI​(JComponent c)` | Creates a UI for a `JRootPane`.
    `void` | `installUI​(JComponent c)` | Invokes supers implementation of `installUI` to install the necessary state onto the passed in `JRootPane` to render the metal look and feel implementation of `RootPaneUI`.
    `void` | `propertyChange​(PropertyChangeEvent e)` | Invoked when a property changes.
    `void` | `uninstallUI​(JComponent c)` | Invokes supers implementation to uninstall any of its state.

    - ### Methods declared in class javax.swing.plaf.basic.BasicRootPaneUI

      `installComponents, installDefaults, installKeyboardActions, installListeners, uninstallComponents, uninstallDefaults, uninstallKeyboardActions, uninstallListeners`

    - ### Methods declared in class javax.swing.plaf.ComponentUI

      `contains, getAccessibleChild, getAccessibleChildrenCount, getBaseline, getBaselineResizeBehavior, getMaximumSize, getMinimumSize, getPreferredSize, paint, update`

    - ### Methods declared in class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### MetalRootPaneUI

          public MetalRootPaneUI()

  - ### Method Detail

    - #### createUI

          public static ComponentUI createUI​(JComponent c)

      Creates a UI for a `JRootPane`.
      Parameters:
        `c` - the JRootPane the RootPaneUI will be created for
      Returns:
        the RootPaneUI implementation for the passed in JRootPane

    - #### installUI

          public void installUI​(JComponent c)

      Invokes supers implementation of `installUI` to install the necessary state onto the passed in `JRootPane` to render the metal look and feel implementation of `RootPaneUI`. If the `windowDecorationStyle` property of the `JRootPane` is other than `JRootPane.NONE`, this will add a custom `Component` to render the widgets to `JRootPane`, as well as installing a custom `Border` and `LayoutManager` on the `JRootPane`.
      Overrides:
        `installUI` in class `ComponentUI`
      Parameters:
        `c` - the JRootPane to install state onto
      See Also:
        `ComponentUI.uninstallUI(javax.swing.JComponent)`, `JComponent.setUI(javax.swing.plaf.ComponentUI)`, `JComponent.updateUI()`

    - #### uninstallUI

          public void uninstallUI​(JComponent c)

      Invokes supers implementation to uninstall any of its state. This will also reset the `LayoutManager` of the `JRootPane`. If a `Component` has been added to the `JRootPane` to render the window decoration style, this method will remove it. Similarly, this will revert the Border and LayoutManager of the `JRootPane` to what it was before `installUI` was invoked.
      Overrides:
        `uninstallUI` in class `ComponentUI`
      Parameters:
        `c` - the JRootPane to uninstall state from
      See Also:
        `ComponentUI.installUI(javax.swing.JComponent)`, `JComponent.updateUI()`

    - #### propertyChange

          public void propertyChange​(PropertyChangeEvent e)

      Invoked when a property changes. `MetalRootPaneUI` is primarily interested in events originating from the `JRootPane` it has been installed on identifying the property `windowDecorationStyle`. If the `windowDecorationStyle` has changed to a value other than `JRootPane.NONE`, this will add a `Component` to the `JRootPane` to render the window decorations, as well as installing a `Border` on the `JRootPane`. On the other hand, if the `windowDecorationStyle` has changed to `JRootPane.NONE`, this will remove the `Component` that has been added to the `JRootPane` as well resetting the Border to what it was before `installUI` was invoked.
      Specified by:
        `propertyChange` in interface `PropertyChangeListener`
      Overrides:
        `propertyChange` in class `BasicRootPaneUI`
      Parameters:
        `e` - A PropertyChangeEvent object describing the event source and the property that has changed.