com.google.gwt.user.client.ui

## Class DecoratorPanel

- java.lang.Object
- - com.google.gwt.user.client.ui.UIObject
  - - com.google.gwt.user.client.ui.Widget
    - - com.google.gwt.user.client.ui.Panel
      - - com.google.gwt.user.client.ui.SimplePanel
        - - com.google.gwt.user.client.ui.DecoratorPanel

- All Implemented Interfaces:
    HasAttachHandlers, HasHandlers, EventListener, AcceptsOneWidget, HasOneWidget, HasVisibility, HasWidgets, HasWidgets.ForIsWidget, IsWidget, java.lang.Iterable<Widget>

      public class DecoratorPanel
      extends SimplePanel

  A `SimplePanel` that wraps its contents in stylized boxes, which can be used to add rounded corners to a `Widget`.

  This widget will only work in quirks mode in most cases. Specifically, setting the height or width of the DecoratorPanel will result in rendering issues.

  Wrapping a `Widget` in a "9-box" allows users to specify images in each of the corners and along the four borders. This method allows the content within the `DecoratorPanel` to resize without disrupting the look of the border. In addition, rounded corners can generally be combined into a single image file, which reduces the number of downloaded files at startup. This class also simplifies the process of using AlphaImageLoaders to support 8-bit transparencies (anti-aliasing and shadows) in ie6, which does not support them normally.

  ### Setting the Size:

  If you set the width or height of the `DecoratorPanel`, you need to set the height and width of the middleCenter cell to 100% so that the middleCenter cell takes up all of the available space. If you do not set the width and height of the `DecoratorPanel`, it will wrap its contents tightly.

       .gwt-DecoratorPanel .middleCenter {
         height: 100%;
         width: 100%;
       }

  ### CSS Style Rules

  - .gwt-DecoratorPanel { the panel }
  - .gwt-DecoratorPanel .top { the top row }
  - .gwt-DecoratorPanel .topLeft { the top left cell }
  - .gwt-DecoratorPanel .topLeftInner { the inner element of the cell }
  - .gwt-DecoratorPanel .topCenter { the top center cell }
  - .gwt-DecoratorPanel .topCenterInner { the inner element of the cell }
  - .gwt-DecoratorPanel .topRight { the top right cell }
  - .gwt-DecoratorPanel .topRightInner { the inner element of the cell }
  - .gwt-DecoratorPanel .middle { the middle row }
  - .gwt-DecoratorPanel .middleLeft { the middle left cell }
  - .gwt-DecoratorPanel .middleLeftInner { the inner element of the cell }
  - .gwt-DecoratorPanel .middleCenter { the middle center cell }
  - .gwt-DecoratorPanel .middleCenterInner { the inner element of the cell }
  - .gwt-DecoratorPanel .middleRight { the middle right cell }
  - .gwt-DecoratorPanel .middleRightInner { the inner element of the cell }
  - .gwt-DecoratorPanel .bottom { the bottom row }
  - .gwt-DecoratorPanel .bottomLeft { the bottom left cell }
  - .gwt-DecoratorPanel .bottomLeftInner { the inner element of the cell }
  - .gwt-DecoratorPanel .bottomCenter { the bottom center cell }
  - .gwt-DecoratorPanel .bottomCenterInner { the inner element of the cell }
  - .gwt-DecoratorPanel .bottomRight { the bottom right cell }
  - .gwt-DecoratorPanel .bottomRightInner { the inner element of the cell }

- - ### Nested Class Summary

    - ### Nested classes/interfaces inherited from class com.google.gwt.user.client.ui.UIObject

      `UIObject.DebugIdImpl, UIObject.DebugIdImplEnabled`

    - ### Nested classes/interfaces inherited from interface com.google.gwt.user.client.ui.HasWidgets

      `HasWidgets.ForIsWidget`

  - ### Field Summary

    - ### Fields inherited from class com.google.gwt.user.client.ui.SimplePanel

      `widget`

    - ### Fields inherited from class com.google.gwt.user.client.ui.Widget

      `eventsToSink`

    - ### Fields inherited from class com.google.gwt.user.client.ui.UIObject

      `DEBUG_ID_PREFIX, MISSING_ELEMENT_ERROR, SETELEMENT_TWICE_ERROR`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `DecoratorPanel()` Create a new `DecoratorPanel`.
    `DecoratorPanel(java.lang.String[] rowStyles, int containerIndex)` Creates a new panel using the specified style names to apply to each row.

  - ### Method Summary

    All Methods Static Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `(package private) static Element` | `createTR(java.lang.String styleName)` Create a new row with a specific style name.
    `protected Element` | `getCellElement(int row, int cell)` Get a specific Element from the panel.
    `protected Element` | `getContainerElement()` Override this method to specify that an element other than the root element be the container for the panel's child widget.

    - ### Methods inherited from class com.google.gwt.user.client.ui.SimplePanel

      `add, getWidget, iterator, remove, setWidget, setWidget`

    - ### Methods inherited from class com.google.gwt.user.client.ui.Panel

      `add, adopt, clear, doAttachChildren, doDetachChildren, orphan, remove`

    - ### Methods inherited from class com.google.gwt.user.client.ui.Widget

      `addAttachHandler, addBitlessDomHandler, addDomHandler, addHandler, asWidget, asWidgetOrNull, createHandlerManager, delegateEvent, ensureHandlers, fireEvent, getHandlerCount, getHandlerManager, getLayoutData, getParent, isAttached, isOrWasAttached, onAttach, onBrowserEvent, onDetach, onLoad, onUnload, removeFromParent, replaceElement, setLayoutData, setParent, sinkEvents, unsinkEvents`

    - ### Methods inherited from class com.google.gwt.user.client.ui.UIObject

      `addStyleDependentName, addStyleName, ensureDebugId, ensureDebugId, ensureDebugId, getAbsoluteLeft, getAbsoluteTop, getElement, getOffsetHeight, getOffsetWidth, getStyleElement, getStyleName, getStyleName, getStylePrimaryName, getStylePrimaryName, getTitle, isVisible, isVisible, onEnsureDebugId, removeStyleDependentName, removeStyleName, resolvePotentialElement, setElement, setElement, setHeight, setPixelSize, setSize, setStyleDependentName, setStyleName, setStyleName, setStyleName, setStyleName, setStylePrimaryName, setStylePrimaryName, setTitle, setVisible, setVisible, setWidth, sinkBitlessEvent, toString`

    - ### Methods inherited from class java.lang.Object

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

    - ### Methods inherited from interface java.lang.Iterable

      `forEach, spliterator`

- - ### Constructor Detail

    - #### DecoratorPanel

          public DecoratorPanel()

      Create a new `DecoratorPanel`.

    - #### DecoratorPanel

          DecoratorPanel(java.lang.String[] rowStyles,
                         int containerIndex)

      Creates a new panel using the specified style names to apply to each row. Each row will contain three cells (Left, Center, and Right). The Center cell in the containerIndex row will contain the `Widget`.
      Parameters:
        `rowStyles` - an array of style names to apply to each row
        `containerIndex` - the index of the container row

  - ### Method Detail

    - #### createTR

          static Element createTR(java.lang.String styleName)

      Create a new row with a specific style name. The row will contain three cells (Left, Center, and Right), each prefixed with the specified style name. This method allows Widgets to reuse the code on a DOM level, without creating a DecoratorPanel Widget.
      Parameters:
        `styleName` - the style name
      Returns:
        the new row `Element`

    - #### getCellElement

          protected Element getCellElement(int row,
                                           int cell)

      Get a specific Element from the panel.
      Parameters:
        `row` - the row index
        `cell` - the cell index
      Returns:
        the Element at the given row and cell

    - #### getContainerElement

          protected Element getContainerElement()

      Description copied from class: `SimplePanel`
      Override this method to specify that an element other than the root element be the container for the panel's child widget. This can be useful when you want to create a simple panel that decorates its contents. Note that this method continues to return the `Element` class defined in the `User` module to maintain backwards compatibility.
      Overrides:
        `getContainerElement` in class `SimplePanel`
      Returns:
        the element to be used as the panel's container