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## com.maryanovsky.gwtutils.client.ui
Class Accordion

    java.lang.Object
      com.google.gwt.user.client.ui.UIObject
          com.google.gwt.user.client.ui.Widget
              com.google.gwt.user.client.ui.Composite
                  com.google.gwt.user.client.ui.ResizeComposite
                      com.maryanovsky.gwtutils.client.ui.Accordion

All Implemented Interfaces:
  HasAttachHandlers, HasHandlers, EventListener, HasVisibility, IsRenderable, IsWidget, ProvidesResize, RequiresResize

Direct Known Subclasses:
  DefaultSizeAccordion

    public class Accordion

extends ResizeComposite
implements RequiresResize, ProvidesResize

An "Accordion" panel. It arranges its children vertically with each child having a "header" that can be clicked to show/hide the widget. This is similar to `StackLayoutPanel`, only more than one widget can be visible at a time.

Author:
  Maryanovsky Alexander

Nested Class Summary

Nested classes/interfaces inherited from class com.google.gwt.user.client.ui.UIObject
`UIObject.DebugIdImpl, UIObject.DebugIdImplEnabled`

Field Summary

Fields inherited from class com.google.gwt.user.client.ui.UIObject
`DEBUG_ID_PREFIX`

Constructor Summary
`Accordion(Style.Unit unit)` Creates a new `Accordion` which will have children whose sizes will be specified in the given unit.

Method Summary
`void` | `add(Widget widget, double widgetHeight, Widget header, double headerHeight)` Adds a widget with the specified header at the bottom.
`Widget` | `getHeader(int index)` Returns the header for the widget at the specified index.
`Widget` | `getHeader(Widget widget)` Returns the header for the specified widget.
`double` | `getSpacing()` Returns the spacing between the widgets.
`int` | `getWidgetCount()` Returns the number of widgets in the Accordion.
`int` | `getWidgetIndex(Widget widget)` Returns the index of the specified widget; -1 if the widget is not a child.
`void` | `insert(Widget widget, double widgetHeight, Widget header, double headerHeight, int index)` Adds a widget with the specified header at the specified index.
`boolean` | `isWidgetVisible(int index)` Returns whether the widget at the specified index is visible.
`boolean` | `isWidgetVisible(Widget widget)` Returns whether the specified widget is visible.
`protected void` | `onLoad()` Lays the children out when the widget is attached.
`void` | `setSpacing(double spacing)` Sets the spacing between the widgets.
`void` | `setWidgetVisible(int index, boolean isVisible)` Sets the visibility of the widget at the specified index.
`void` | `setWidgetVisible(Widget widget, boolean isVisible)` Sets the visibility of the specified widget.

Methods inherited from class com.google.gwt.user.client.ui.ResizeComposite
`initWidget, onResize`

Methods inherited from class com.google.gwt.user.client.ui.Composite
`claimElement, getWidget, initializeClaimedElement, isAttached, onAttach, onBrowserEvent, onDetach, render, render, resolvePotentialElement, setWidget`

Methods inherited from class com.google.gwt.user.client.ui.Widget
`addAttachHandler, addBitlessDomHandler, addDomHandler, addHandler, asWidget, asWidgetOrNull, createHandlerManager, delegateEvent, doAttachChildren, doDetachChildren, fireEvent, getHandlerCount, getLayoutData, getParent, isOrWasAttached, onUnload, removeFromParent, setLayoutData, sinkEvents`

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, setElement, setElement, setHeight, setPixelSize, setSize, setStyleDependentName, setStyleName, setStyleName, setStyleName, setStyleName, setStylePrimaryName, setStylePrimaryName, setTitle, setVisible, setVisible, setWidth, sinkBitlessEvent, toString, unsinkEvents`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Methods inherited from interface com.google.gwt.user.client.ui.RequiresResize
`onResize`

Constructor Detail

### Accordion

    public Accordion(Style.Unit unit)

  Creates a new `Accordion` which will have children whose sizes will be specified in the given unit.

Method Detail

### getWidgetCount

    public int getWidgetCount()

  Returns the number of widgets in the Accordion.

### getWidgetIndex

    public int getWidgetIndex(Widget widget)

  Returns the index of the specified widget; -1 if the widget is not a child.

### getHeader

    public Widget getHeader(int index)

  Returns the header for the widget at the specified index.

### getHeader

    public Widget getHeader(Widget widget)

  Returns the header for the specified widget.

### isWidgetVisible

    public boolean isWidgetVisible(int index)

  Returns whether the widget at the specified index is visible.

### isWidgetVisible

    public boolean isWidgetVisible(Widget widget)

  Returns whether the specified widget is visible.

### setWidgetVisible

    public void setWidgetVisible(int index,
                                 boolean isVisible)

  Sets the visibility of the widget at the specified index.

### setWidgetVisible

    public void setWidgetVisible(Widget widget,
                                 boolean isVisible)

  Sets the visibility of the specified widget.

### add

    public void add(Widget widget,
                    double widgetHeight,
                    Widget header,
                    double headerHeight)

  Adds a widget with the specified header at the bottom. The heights of the widget and header must be specified.

### insert

    public void insert(Widget widget,
                       double widgetHeight,
                       Widget header,
                       double headerHeight,
                       int index)

  Adds a widget with the specified header at the specified index. Also specified are their heights and the location where to insert them.

### getSpacing

    public double getSpacing()

  Returns the spacing between the widgets.

### setSpacing

    public void setSpacing(double spacing)

  Sets the spacing between the widgets.

### onLoad

    protected void onLoad()

  Lays the children out when the widget is attached.

  Overrides:
    `onLoad` in class `Widget`

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