# Class ContainerList

java.lang.Object
com.codename1.ui.Component
com.codename1.ui.Container
com.codename1.ui.list.ContainerList

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

public class ContainerList extends Container
This is a "list component" implemented as a container with a layout manager which provides some of the ui advantages of a Container and some of a list while pulling out some of the drawbacks of both. This container uses the model/renderer approach for populating itself, adding/removing entries will probably break it. It still provides most of the large size advantages a list offers since the components within it are very simple and don't contain any actual state other than layout information. The big advantage with this class is the ability to leverage elaborate CodenameOne layouts such as Grid, Table & flow layout to provide other ways of rendering the content of a list model.

- ## 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
  `ContainerList()`
  Default constructor
  `ContainerList(Layout l, ListModel m)`
  Constructs a container list with the given model and layout
  `ContainerList(ListModel m)`
  Constructs a container list with the given model

- ## Method Summary

  Modifier and Type
  Method
  Description
  `void`
  `addActionListener(ActionListener l)`
  Allows binding a listener to user selection actions
  `protected void`
  `deinitialize()`
  Invoked to indicate that the component initialization is being reversed since the component was detached from the container hierarchy.
  `protected void`
  `fireActionEvent(ActionEvent evt)`
  Triggers the event to the listeners
  `Vector`
  `getActionListeners()`
  This method allows extracting the action listeners from the current list
  `protected int`
  `getDragRegionStatus(int x, int y)`
  Indicates if the section within the X/Y area is a "drag region" where we expect people to drag or press in which case we can instantly start dragging making perceived performance faster.
  `Collection`
  `getListeners()`
  This method allows extracting the action listeners from the current list
  `ListModel`
  `getModel()`
  Returns the list model
  `String[]`
  `getPropertyNames()`
  A component may expose mutable property names for a UI designer to manipulate, this API is designed for usage internally by the GUI builder code
  `String[]`
  `getPropertyTypeNames()`
  This method is here to workaround an XMLVM array type bug where property types aren't identified properly, it returns the names of the types using the following type names: String,int,double,long,byte,short,char,String[],String[][],byte[],Image,Image[],Object[],ListModel,ListCellRenderer
  `Class[]`
  `getPropertyTypes()`
  Matches the property names method (see that method for further details).
  `Object`
  `getPropertyValue(String name)`
  Returns the current value of the property name, this method is used by the GUI builder
  `CellRenderer`
  `getRenderer()`
  The renderer used to draw the container list elements
  `int`
  `getSelectedIndex()`
  Returns the current selected offset in the list
  `Object`
  `getSelectedItem()`
  Returns the current/last selected item
  `Rectangle`
  `getSelectedRect()`
  Returns the component bounds with absolute screen coordinates, for components that include an internal selection behavior and are not containers (currently only List) this method allows returning the position of the selection itself which is useful for things such as the popup dialog and similar UI's that need to reference the position of the selection externally
  `protected void`
  `initComponent()`
  Allows subclasses to bind functionality that relies on fully initialized and "ready for action" component state
  `void`
  `removeActionListener(ActionListener l)`
  Allows binding a listener to user selection actions
  `void`
  `setModel(ListModel model)`
  Set the model for the container list
  `String`
  `setPropertyValue(String name, Object value)`
  Sets a new value to the given property, returns an error message if failed and null if successful.
  `void`
  `setRenderer(CellRenderer r)`
  The renderer used to draw the container list elements
  `void`
  `setSelectedIndex(int index)`
  Sets the current selected offset in the list, by default this implementation will scroll the list to the selection if the selection is outside of the screen

  ### 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, contains, containsOrOwns, createStyleAnimation, 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, 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, getSameHeight, getSameWidth, getScrollable, getScrollAnimationSpeed, getScrollDimension, getScrollOpacity, getScrollOpacityChangeSpeed, getScrollX, getScrollY, getSelectCommandText, getSelectedStyle, getSemantics, getStyle, getTabIndex, getTensileLength, getTextSelectionSupport, getTooltip, getUIID, getUnselectedStyle, getVisibleBounds, getVisibleBounds, getWidth, getX, getY, growShrink, handlesInput, hasFixedPreferredSize, hasFocus, hideNativeOverlay, 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, 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

  - ### ContainerList

    public ContainerList()
    Default constructor

  - ### ContainerList

    public ContainerList(ListModel m)

    Constructs a container list with the given model

    ###### Parameters

    - `m`: the model

  - ### ContainerList

    public ContainerList(Layout l, ListModel m)

    Constructs a container list with the given model and layout

    ###### Parameters

    - `l`: layout manager

    - `m`: the model

- ## Method Details

  - ### getRenderer

    public CellRenderer getRenderer()
    The renderer used to draw the container list elements

  - ### setRenderer

    public void setRenderer(CellRenderer r)

    The renderer used to draw the container list elements

    ###### Parameters

    - `r`: renderer instance

  - ### getModel

    public ListModel getModel()

    Returns the list model

    ###### Returns

    the list model

  - ### setModel

    public void setModel(ListModel model)

    Set the model for the container list

    ###### Parameters

    - `model`: a model class that is mapped into the internal components

  - ### addActionListener

    public void addActionListener(ActionListener l)

    Allows binding a listener to user selection actions

    ###### Parameters

    - `l`: the action listener to be added

  - ### getActionListeners

    public Vector getActionListeners()

    This method allows extracting the action listeners from the current list

    ###### Returns

    vector containing the action listeners on the list

    ###### Deprecated

    use getListeners instead

  - ### getListeners

    public Collection getListeners()

    This method allows extracting the action listeners from the current list

    ###### Returns

    Collection containing the action listeners on the list

  - ### removeActionListener

    public void removeActionListener(ActionListener l)

    Allows binding a listener to user selection actions

    ###### Parameters

    - `l`: the action listener to be removed

  - ### initComponent

    protected void initComponent()
    Allows subclasses to bind functionality that relies on fully initialized and "ready for action" component state
    Overrides:
      `initComponent` in class `Component`

  - ### deinitialize

    protected void deinitialize()
    Invoked to indicate that the component initialization is being reversed since the component was detached from the container hierarchy. This allows the component to deregister animators and cleanup after itself. This method is the opposite of the initComponent() method.
    Overrides:
      `deinitialize` in class `Component`

  - ### getSelectedItem

    public Object getSelectedItem()

    Returns the current/last selected item

    ###### Returns

    selected item or null

  - ### getSelectedIndex

    public int getSelectedIndex()

    Returns the current selected offset in the list

    ###### Returns

    the current selected offset in the list

  - ### setSelectedIndex

    public void setSelectedIndex(int index)

    Sets the current selected offset in the list, by default this implementation will scroll the list to the selection if the selection is outside of the screen

    ###### Parameters

    - `index`: the current selected offset in the list

  - ### fireActionEvent

    protected void fireActionEvent(ActionEvent evt)

    Triggers the event to the listeners

    ###### Parameters

    - `evt`: the event to fire

  - ### getPropertyNames

    public String[] getPropertyNames()

    A component may expose mutable property names for a UI designer to manipulate, this API is designed for usage internally by the GUI builder code

    ###### Returns

    the property names allowing mutation

    Overrides:
      `getPropertyNames` in class `Component`

  - ### getPropertyTypes

    public Class[] getPropertyTypes()

    Matches the property names method (see that method for further details).

    ###### Returns

    the types of the properties

    Overrides:
      `getPropertyTypes` in class `Component`

  - ### getPropertyTypeNames

    public String[] getPropertyTypeNames()

    This method is here to workaround an XMLVM array type bug where property types aren't identified properly, it returns the names of the types using the following type names: String,int,double,long,byte,short,char,String[],String[][],byte[],Image,Image[],Object[],ListModel,ListCellRenderer

    ###### Returns

    Array of type names

    Overrides:
      `getPropertyTypeNames` in class `Component`

  - ### getPropertyValue

    public Object getPropertyValue(String name)

    Returns the current value of the property name, this method is used by the GUI builder

    ###### Parameters

    - `name`: the name of the property

    ###### Returns

    the value of said property

    Overrides:
      `getPropertyValue` in class `Component`

  - ### setPropertyValue

    public String setPropertyValue(String name, Object value)

    Sets a new value to the given property, returns an error message if failed and null if successful. Notice that some builtin properties such as "$designMode" might be sent to components to indicate application state.

    ###### Parameters

    - `name`: the name of the property

    - `value`: new value for the property

    ###### Returns

    error message or null

    Overrides:
      `setPropertyValue` in class `Component`

  - ### getSelectedRect

    public Rectangle getSelectedRect()
    Description copied from class: `Component`

    Returns the component bounds with absolute screen coordinates, for components that include an internal selection behavior and are not containers (currently only List) this method allows returning the position of the selection itself which is useful for things such as the popup dialog and similar UI's that need to reference the position of the selection externally

    ###### Returns

    the bounds of the component with absolute screen coordinates

    Overrides:
      `getSelectedRect` in class `Component`

  - ### getDragRegionStatus

    protected int getDragRegionStatus(int x, int y)

    Indicates if the section within the X/Y area is a "drag region" where we expect people to drag or press in which case we can instantly start dragging making perceived performance faster. This is invoked by the implementation code to optimize drag start behavior

    ###### Parameters

    - `x`: x location for the touch

    - `y`: y location for the touch

    ###### Returns

    one of the DRAG_REGION_* values

    Overrides:
      `getDragRegionStatus` in class `Component`