# Class Accordion

java.lang.Object
com.codename1.ui.Component
com.codename1.ui.Container
com.codename1.components.Accordion

All Implemented Interfaces:
  `Animation, Editable, StyleListener, Iterable<Component>`

public class Accordion extends Container

The `Accordion` ui pattern is a vertically stacked list of items. Each item can be opened/closed to reveal more content similarly to a `com.codename1.ui.tree.Tree` however unlike the `com.codename1.ui.tree.Tree` the `Accordion` is designed to include containers or arbitrary components rather than model based data.

This makes the `Accordion` more convenient as a tool for folding/collapsing UI elements known in advance whereas a `com.codename1.ui.tree.Tree` makes more sense as a tool to map data e.g. filesystem structure, XML hierarchy etc.

Note that the `Accordion` like many composite components in Codename One is scrollable by default which means you should use it within a non-scrollable hierarchy. If you wish to add it into a scrollable `com.codename1.ui.Container` you should disable it's default scrollability using `setScrollable(false)`.

Example Usage

    Form f = new Form("Accordion", new BorderLayout());
    Accordion accr = new Accordion();
    accr.addContent("Item1", new SpanLabel("The quick brown fox jumps over the lazy dog\n"
            + "The quick brown fox jumps over the lazy dog"));
    accr.addContent("Item2", new SpanLabel("The quick brown fox jumps over the lazy dog\n"
            + "The quick brown fox jumps over the lazy dog\n "
            + "The quick brown fox jumps over the lazy dog\n "
            + "The quick brown fox jumps over the lazy dog\n "
            + ""));

    accr.addContent("Item3", BoxLayout.encloseY(new Label("Label"), new TextField(), new Button("Button"), new CheckBox("CheckBox")));

    f.add(BorderLayout.CENTER, accr);
    f.show();

Screenshots

- ## Field Summary

  ### Fields inherited from class Component

  `BASELINE, BOTTOM, BRB_CENTER_OFFSET, BRB_CONSTANT_ASCENT, BRB_CONSTANT_DESCENT, BRB_OTHER, CENTER, CROSSHAIR_CURSOR, DEFAULT_CURSOR, DRAG_REGION_IMMEDIATELY_DRAG_X, DRAG_REGION_IMMEDIATELY_DRAG_XY, DRAG_REGION_IMMEDIATELY_DRAG_Y, DRAG_REGION_LIKELY_DRAG_X, DRAG_REGION_LIKELY_DRAG_XY, DRAG_REGION_LIKELY_DRAG_Y, DRAG_REGION_NOT_DRAGGABLE, DRAG_REGION_POSSIBLE_DRAG_X, DRAG_REGION_POSSIBLE_DRAG_XY, DRAG_REGION_POSSIBLE_DRAG_Y, E_RESIZE_CURSOR, HAND_CURSOR, LEFT, MOVE_CURSOR, N_RESIZE_CURSOR, NE_RESIZE_CURSOR, NW_RESIZE_CURSOR, RIGHT, S_RESIZE_CURSOR, SE_RESIZE_CURSOR, SW_RESIZE_CURSOR, TEXT_CURSOR, TOP, W_RESIZE_CURSOR, WAIT_CURSOR`

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `Accordion()`
  Empty Constructor
  `Accordion(char openIcon, char closeIcon)`
  Create an accordion with open and close icons set
  `Accordion(char openIcon, char closeIcon, String openCloseUIID)`
  Create an accordion with open and close icons set
  `Accordion(Image openIcon, Image closeIcon)`
  Create an accordion with open and close icons set

- ## Method Summary

  Modifier and Type
  Method
  Description
  `void`
  `addContent(Component header, Component body)`
  Add an item to the Accordion Container
  `void`
  `addContent(String header, Component body)`
  Add an item to the Accordion Container
  `void`
  `addOnClickItemListener(ActionListener a)`
  To listen item click in accordion component
  `void`
  `collapse(Component body)`
  Closes the accordion with the given "body"
  `void`
  `expand(Component body)`
  Expands the accordion with the given "body"
  `String`
  `getBackgroundItemUIID()`
  Default UIID for the content item within the accordion
  `Component`
  `getCurrentlyExpanded()`
  Returns the body component of the currently expanded accordion element or null if none is expanded
  `String`
  `getHeaderUIID()`
  UIID for the header component
  `String`
  `getOpenCloseIconUIID()`
  UIID for the arrow icon for expanding/collapsing
  `void`
  `removeContent(Component body)`
  Removes the content from the accordion
  `void`
  `removeOnClickItemListener(ActionListener a)`
  To remove item click in accordion component
  `void`
  `setAutoClose(boolean autoClose)`
  Sets the auto close flag, if this flag is true clicking on an item to open an item will automatically close the previous opened item.
  `void`
  `setBackgroundItemUIID(String uiidBackGroundItem)`
  Default UIID for the content item within the accordion
  `void`
  `setCloseIcon(char closeIcon)`
  Sets the closed icon using material image
  `void`
  `setCloseIcon(char closeIcon, float size)`
  Sets the closed icon using material image
  `void`
  `setCloseIcon(char closeIcon, String uiid)`
  Sets the closed icon using material image with a custom uiid
  `void`
  `setCloseIcon(Image closeIcon)`
  Sets the closed icon
  `void`
  `setHeader(Component header, Component body)`
  Replaces the title for content that was already added.
  `void`
  `setHeader(String header, Component body)`
  Replaces the title for content that was already added.
  `void`
  `setHeaderUIID(Component body, String uiid)`
  Sets the header UIID for the given accordion uiid
  `void`
  `setHeaderUIID(String uiidHeader)`
  UIID for the header component
  `void`
  `setOpenCloseIconUIID(String uiidOpenCloseIcon)`
  UIID for the arrow icon for expanding/collapsing
  `void`
  `setOpenIcon(char openIcon)`
  Sets the open icon using material image
  `void`
  `setOpenIcon(char openIcon, float size)`
  Sets the open icon using material image
  `void`
  `setOpenIcon(char openIcon, String uiid)`
  Sets the open icon using material image with a custom uiid
  `void`
  `setOpenIcon(Image openIcon)`
  Sets the open icon

  ### Methods inherited from class Container

  `add, add, add, add, add, add, addAll, addComponent, addComponent, addComponent, addComponent, animateHierarchy, animateHierarchyAndWait, animateHierarchyFade, animateHierarchyFadeAndWait, animateLayout, animateLayoutAndWait, animateLayoutFade, animateLayoutFadeAndWait, animateUnlayout, animateUnlayoutAndWait, applyRTL, calcPreferredSize, cancelRepaints, clearClientProperties, constrainHeightWhenScrollable, constrainWidthWhenScrollable, contains, createAnimateHierarchy, createAnimateHierarchyFade, createAnimateLayout, createAnimateLayoutFade, createAnimateLayoutFadeAndWait, createAnimateMotion, createAnimateUnlayout, createReplaceTransition, dragInitiated, drop, encloseIn, encloseIn, findDropTargetAt, findFirstFocusable, fireClicked, flushReplace, forceRevalidate, getBottomGap, getChildrenAsList, getClosestComponentTo, getComponentAt, getComponentAt, getComponentCount, getComponentIndex, getGridPosX, getGridPosY, getLayout, getLayoutHeight, getLayoutWidth, getLeadComponent, getLeadParent, getResponderAt, getSafeAreaRoot, getScrollIncrement, getSideGap, getUIManager, initLaf, invalidate, isEnabled, isSafeArea, isSafeAreaRoot, isScrollableX, isScrollableY, isSelectableInteraction, isSurface, iterator, iterator, keyPressed, keyReleased, layoutContainer, morph, morphAndWait, paint, paintComponentBackground, paintGlass, paramString, pointerPressed, refreshTheme, removeAll, removeComponent, replace, replace, replaceAndWait, replaceAndWait, replaceAndWait, revalidate, revalidateLater, revalidateWithAnimationSafety, scrollComponentToVisible, setCellRenderer, setEnabled, setLayout, setLeadComponent, setSafeArea, setSafeAreaRoot, setScrollable, setScrollableX, setScrollableY, setScrollIncrement, setShouldCalcPreferredSize, setShouldLayout, setUIManager, updateTabIndices`

  ### Methods inherited from class Component

  `accessibilityChanged, accessibilityChanged, addContextMenuListener, addDragFinishedListener, addDragOverListener, addDropListener, addFocusListener, addLongPressListener, addMouseWheelListener, addPointerDraggedListener, addPointerPressedListener, addPointerReleasedListener, addPullToRefresh, addScrollListener, addStateChangeListener, addStylusListener, animate, announceForAccessibility, bindProperty, blocksSideSwipe, calcScrollSize, consumesRawTextInput, contains, containsOrOwns, createStyleAnimation, deinitialize, deinitializeCustomStyle, dragEnter, dragExit, dragFinished, draggingOver, drawDraggedImage, focusGained, focusLost, getAbsoluteX, getAbsoluteY, getAccessibilityNode, getAccessibilityText, getAllStyles, getAnimationManager, getBaseline, getBaselineResizeBehavior, getBindablePropertyNames, getBindablePropertyTypes, getBorder, getBoundPropertyValue, getBounds, getBounds, getClientProperty, getCloudBoundProperty, getCloudDestinationProperty, getComponentForm, getComponentState, getCursor, getDefaultDragTransparency, getDirtyRegion, getDisabledStyle, getDraggedx, getDraggedy, getDragImage, getDragRegionStatus, getDragSpeed, getDragTransparency, getEditingDelegate, getHeight, getInlineAllStyles, getInlineDisabledStyles, getInlinePressedStyles, getInlineSelectedStyles, getInlineStylesTheme, getInlineUnselectedStyles, getInnerHeight, getInnerPreferredH, getInnerPreferredW, getInnerWidth, getInnerX, getInnerY, getLabelForComponent, getName, getNativeOverlay, getNextFocusDown, getNextFocusLeft, getNextFocusRight, getNextFocusUp, getOuterHeight, getOuterPreferredH, getOuterPreferredW, getOuterWidth, getOuterX, getOuterY, getOwner, getParent, getPreferredH, getPreferredSize, getPreferredSizeStr, getPreferredTabIndex, getPreferredW, getPressedStyle, getPropertyNames, getPropertyTypeNames, getPropertyTypes, getPropertyValue, getSameHeight, getSameWidth, getScrollable, getScrollAnimationSpeed, getScrollDimension, getScrollOpacity, getScrollOpacityChangeSpeed, getScrollX, getScrollY, getSelectCommandText, getSelectedRect, getSelectedStyle, getSemantics, getStyle, getTabIndex, getTensileLength, getTextSelectionSupport, getTooltip, getUIID, getUnselectedStyle, getVisibleBounds, getVisibleBounds, getWidth, getX, getY, growShrink, handlesInput, hasFixedPreferredSize, hasFocus, hideNativeOverlay, initComponent, initCustomStyle, initDisabledStyle, initPressedStyle, initSelectedStyle, initUnselectedStyle, installDefaultPainter, isAlwaysTensile, isBlockLead, isCellRenderer, isChildOf, isDragActivated, isDragAndDropOperation, isDraggable, isDragRegion, isDropTarget, isEditable, isEditing, isFlatten, isFocusable, isGrabsPointerEvents, isHidden, isHidden, isHideInLandscape, isHideInPortrait, isHScrollThumbGrabbed, isHScrollThumbHover, isIgnorePointerEvents, isInClippingRegion, isInitialized, isOpaque, isOwnedBy, isPinchBlocksDragAndDrop, isRippleEffect, isRTL, isScrollable, isScrollVisible, isSetCursorSupported, isSmoothScrolling, isSnapToGrid, isStickyDrag, isTactileTouch, isTactileTouch, isTensileDragEnabled, isTraversable, isVisible, isVScrollThumbGrabbed, isVScrollThumbHover, keyRepeated, laidOut, longKeyPress, longPointerPress, onScrollX, onScrollY, onSetFocusable, paintBackground, paintBackgrounds, paintBorder, paintBorderBackground, paintComponent, paintComponent, paintIntersectingComponentsAbove, paintLock, paintLockRelease, paintRippleOverlay, paintScrollbars, paintScrollbarX, paintScrollbarY, paintShadows, parsePreferredSize, pinch, pinch, pinchReleased, pointerDragged, pointerDragged, pointerHover, pointerHoverPressed, pointerHoverReleased, pointerPressed, pointerReleased, pointerReleased, putClientProperty, refreshTheme, refreshTheme, remove, removeContextMenuListener, removeDragFinishedListener, removeDragOverListener, removeDropListener, removeFocusListener, removeLongPressListener, removeMouseWheelListener, removePointerDraggedListener, removePointerPressedListener, removePointerReleasedListener, removeScrollListener, removeStateChangeListener, removeStylusListener, repaint, repaint, requestFocus, resetFocusable, respondsToPointerEvents, rotation, scrollRectToVisible, scrollRectToVisible, setAccessibilityText, setAlwaysTensile, setBlockLead, setBoundPropertyValue, setCloudBoundProperty, setCloudDestinationProperty, setComponentState, setCursor, setDefaultDragTransparency, setDirtyRegion, setDisabledStyle, setDraggable, setDragTransparency, setDropTarget, setEditingDelegate, setFlatten, setFocus, setFocusable, setGrabsPointerEvents, setHandlesInput, setHeight, setHidden, setHidden, setHideInLandscape, setHideInPortrait, setHorizontalScrollBounds, setIgnorePointerEvents, setInitialized, setInlineAllStyles, setInlineDisabledStyles, setInlinePressedStyles, setInlineSelectedStyles, setInlineStylesTheme, setInlineUnselectedStyles, setIsScrollVisible, setLabelForComponent, setName, setNextFocusDown, setNextFocusLeft, setNextFocusRight, setNextFocusUp, setOpaque, setOwner, setPinchBlocksDragAndDrop, setPreferredH, setPreferredSize, setPreferredSizeStr, setPreferredTabIndex, setPreferredW, setPressedStyle, setPropertyValue, setPullToRefresh, setRippleEffect, setRTL, setSameHeight, setSameSize, setSameWidth, setScrollAnimationSpeed, setScrollOpacityChangeSpeed, setScrollSize, setScrollVisible, setScrollX, setScrollY, setSelectCommandText, setSelectedStyle, setSize, setSmoothScrolling, setSnapToGrid, setTabIndex, setTactileTouch, setTensileDragEnabled, setTensileLength, setTooltip, setTraversable, setUIID, setUIID, setUIIDFinal, setUnselectedStyle, setVerticalScrollBounds, setVisible, setWidth, setX, setY, shouldBlockSideSwipe, shouldBlockSideSwipeLeft, shouldBlockSideSwipeRight, shouldRenderComponentSelection, showNativeOverlay, startEditingAsync, stopEditing, stripMarginAndPadding, styleChanged, toImage, toString, unbindProperty, updateNativeOverlay, visibleBoundsContains`

  ### Methods inherited from class Object

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

  ### Methods inherited from interface Iterable

  `forEach`

- ## Constructor Details

  - ### Accordion

    public Accordion()
    Empty Constructor

  - ### Accordion

    public Accordion(Image openIcon, Image closeIcon)

    Create an accordion with open and close icons set

    ###### Parameters

    - `openIcon`: the open icon of the accordion

    - `closeIcon`: the close icon of the accordion

  - ### Accordion

    public Accordion(char openIcon, char closeIcon)

    Create an accordion with open and close icons set

    ###### Parameters

    - `openIcon`: the open icon of the accordion

    - `closeIcon`: the close icon of the accordion

  - ### Accordion

    public Accordion(char openIcon, char closeIcon, String openCloseUIID)

    Create an accordion with open and close icons set

    ###### Parameters

    - `openIcon`: the open icon of the accordion

    - `closeIcon`: the close icon of the accordion

    - `openCloseUIID`: the uiid of the open and close icons

- ## Method Details

  - ### addContent

    public void addContent(String header, Component body)

    Add an item to the Accordion Container

    ###### Parameters

    - `header`: the item title

    - `body`: the item Component to hide/show

  - ### setHeader

    public void setHeader(String header, Component body)

    Replaces the title for content that was already added. Notice that this will fail if the content isn't in yet.

    ###### Parameters

    - `header`: the new title for the content

    - `body`: the content that was already added with a different header using addContent

  - ### setHeader

    public void setHeader(Component header, Component body)

    Replaces the title for content that was already added. Notice that this will fail if the content isn't in yet.

    ###### Parameters

    - `header`: the new title for the content

    - `body`: the content that was already added with a different header using addContent

  - ### removeContent

    public void removeContent(Component body)

    Removes the content from the accordion

    ###### Parameters

    - `body`: the body previously added with `com.codename1.ui.Component)` or

  - ### addContent

    public void addContent(Component header, Component body)

    Add an item to the Accordion Container

    ###### Parameters

    - `header`: the item title Component

    - `body`: the item Component to hide/show

  - ### setHeaderUIID

    public void setHeaderUIID(Component body, String uiid)

    Sets the header UIID for the given accordion uiid

    ###### Parameters

    - `body`: the component within the accordion

    - `uiid`: the uiid for the header

  - ### getCurrentlyExpanded

    public Component getCurrentlyExpanded()

    Returns the body component of the currently expanded accordion element or null if none is expanded

    ###### Returns

    a component

  - ### expand

    public void expand(Component body)

    Expands the accordion with the given "body"

    ###### Parameters

    - `body`: the body component of the accordion to expand

  - ### collapse

    public void collapse(Component body)

    Closes the accordion with the given "body"

    ###### Parameters

    - `body`: the body component of the accordion to close

  - ### setCloseIcon

    public void setCloseIcon(Image closeIcon)

    Sets the closed icon

    ###### Parameters

    - `closeIcon`: the close icon

  - ### setOpenIcon

    public void setOpenIcon(Image openIcon)

    Sets the open icon

    ###### Parameters

    - `openIcon`: the open icon

  - ### setCloseIcon

    public void setCloseIcon(char closeIcon)

    Sets the closed icon using material image

    ###### Parameters

    - `closeIcon`: the close icon (e.g. `FontImage.MATERIAL_KEYBOARD_ARROW_DOWN`)

  - ### setOpenIcon

    public void setOpenIcon(char openIcon)

    Sets the open icon using material image

    ###### Parameters

    - `openIcon`: the open icon (e.g. `FontImage.MATERIAL_KEYBOARD_ARROW_RIGHT`)

  - ### setCloseIcon

    public void setCloseIcon(char closeIcon, float size)

    Sets the closed icon using material image

    ###### Parameters

    - `closeIcon`: the close icon (e.g. `FontImage.MATERIAL_KEYBOARD_ARROW_DOWN`)

    - `size`: the size in millimeters for the arrow

  - ### setOpenIcon

    public void setOpenIcon(char openIcon, float size)

    Sets the open icon using material image

    ###### Parameters

    - `openIcon`: the open icon (e.g. `FontImage.MATERIAL_KEYBOARD_ARROW_RIGHT`)

    - `size`: the size in millimeters for the arrow

  - ### setCloseIcon

    public void setCloseIcon(char closeIcon, String uiid)

    Sets the closed icon using material image with a custom uiid

    ###### Parameters

    - `closeIcon`: the close icon (e.g. `FontImage.MATERIAL_KEYBOARD_ARROW_DOWN`)

    - `uiid`: to custom icon from res file

  - ### setOpenIcon

    public void setOpenIcon(char openIcon, String uiid)

    Sets the open icon using material image with a custom uiid

    ###### Parameters

    - `openIcon`: the open icon (e.g. `FontImage.MATERIAL_KEYBOARD_ARROW_RIGHT`)

    - `uiid`: to custom icon from res file

  - ### setAutoClose

    public void setAutoClose(boolean autoClose)

    Sets the auto close flag, if this flag is true clicking on an item to open an item will automatically close the previous opened item.

    ###### Parameters

    - `autoClose`: determines if more then 1 item can be opened on screen

  - ### addOnClickItemListener

    public void addOnClickItemListener(ActionListener a)

    To listen item click in accordion component

    ###### Parameters

    - `a`: ActionListener to implement the method

  - ### removeOnClickItemListener

    public void removeOnClickItemListener(ActionListener a)

    To remove item click in accordion component

    ###### Parameters

    - `a`: ActionListener to implement the method

  - ### getBackgroundItemUIID

    public String getBackgroundItemUIID()

    Default UIID for the content item within the accordion

    ###### Returns

    the uiid

  - ### setBackgroundItemUIID

    public void setBackgroundItemUIID(String uiidBackGroundItem)

    Default UIID for the content item within the accordion

    ###### Parameters

    - `uiidBackGroundItem`: to custom the background in the accordion component

  - ### getHeaderUIID

    public String getHeaderUIID()
    UIID for the header component
    Returns:
      the uiid

  - ### setHeaderUIID

    public void setHeaderUIID(String uiidHeader)

    UIID for the header component

    ###### Parameters

    - `uiidHeader`: to custom the header in the accordion component

  - ### getOpenCloseIconUIID

    public String getOpenCloseIconUIID()

    UIID for the arrow icon for expanding/collapsing

    ###### Returns

    the UIID

  - ### setOpenCloseIconUIID

    public void setOpenCloseIconUIID(String uiidOpenCloseIcon)

    UIID for the arrow icon for expanding/collapsing

    ###### Parameters

    - `uiidOpenCloseIcon`: to custom the background of the Open/Close icon