Package 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, 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 }