com.telerik.widget.list

Class ListViewBehavior

java.lang.Object

com.telerik.widget.list.ListViewBehavior

Direct Known Subclasses:

CollapsibleGroupsBehavior, ItemReorderBehavior, LoadOnDemandBehavior, SelectionBehavior, StickyHeaderBehavior, SwipeActionsBehavior, SwipeExecuteBehavior, SwipeRefreshBehavior

public class ListViewBehavior
extends Object

Represents a base class for behaviors used by RadListView.

Constructor Summary

Constructors

Constructor and Description
ListViewBehavior()

Method Summary

Modifier and Type	Method and Description
void	bindViewHolder(ListViewHolder holder, int i) Binds the provided ListViewHolder instance to the dataitem at the specified index.
ListViewHolder	createViewHolder(ViewGroup parent, int viewType) Creates a ListViewHolder instance for the corresponding view type.
int	getItemViewType(int position, int suggestedViewType) Returns a view type identifier for the data item at the specified position.
boolean	isInProgress() Returns true if the current behavior is in progress.
boolean	managesViewHolders() Gets a boolean value determining whether the behavior takes care of creating and binding view holders.
boolean	onActionUpOrCancel(boolean isCanceled) Called when a previous gesture ends on up or cancel.
void	onAttached(RadListView listView) Called when the behavior is attached to RadListView with addBehavior(ListViewBehavior).
void	onDetached(RadListView listView) Called when the behavior is detached to RadListView with removeBehavior(ListViewBehavior).
void	onDispatchDraw(Canvas canvas) Called when RadListView's onDispatchDraw method is called.
boolean	onFling(MotionEvent motionEvent, MotionEvent motionEvent2, float velocityX, float velocityY) Called when the fling gesture is detected by RadListView's ListViewGestureListener.
boolean	onInterceptTouchEvent(MotionEvent motionEvent)
void	onLayout(boolean changed, int left, int top, int right, int bottom) Called when RadListView's onLayout method is called.
void	onLongPress(MotionEvent motionEvent) Called when the long press gesture is detected by RadListView's ListViewGestureListener.
void	onLongPressDrag(float startX, float startY, float currentX, float currentY) Called when the drag gesture is detected by RadListView's ListViewGestureListener which started with long press.
boolean	onLongPressDragEnded(boolean isCanceled) Called when a current gesture combination of long press and drag ends on up or cancel.
void	onScrolled(int dx, int dy)
boolean	onShortPressDrag(float startX, float startY, float currentX, float currentY) Called when the drag gesture is detected by RadListView's ListViewGestureListener.
boolean	onTapUp(MotionEvent motionEvent) Called when the tap up gesture is detected by RadListView's ListViewGestureListener.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ListViewBehavior

public ListViewBehavior()

Method Detail

onLayout

public void onLayout(boolean changed,
                     int left,
                     int top,
                     int right,
                     int bottom)

Called when RadListView's onLayout method is called.

Derived classes with children should override this method and call layout on each of their children.

Parameters:

changed - This is a new size or position for this view

left - Left position, relative to parent

top - Top position, relative to parent

right - Right position, relative to parent

bottom - Bottom position, relative to parent

managesViewHolders

public boolean managesViewHolders()

Gets a boolean value determining whether the behavior takes care of creating and binding view holders.

Returns:

true if view holders are managed by the behavior; false otherwise.

createViewHolder

public ListViewHolder createViewHolder(ViewGroup parent,
                                       int viewType)

Creates a ListViewHolder instance for the corresponding view type.

Parameters:

parent - the parent of the view hosted by the view holder.

viewType - the type of view to create a view holder for.

Returns:

the new ListViewHolder instance.

bindViewHolder

public void bindViewHolder(ListViewHolder holder,
                           int i)

Binds the provided ListViewHolder instance to the dataitem at the specified index.

Parameters:

holder - the ListViewHolder instance to bind.

i - the index of the data item in the source collection.

getItemViewType

public int getItemViewType(int position,
                           int suggestedViewType)

Returns a view type identifier for the data item at the specified position.

Parameters:

position - the position of the data item within the data source.

suggestedViewType - the view type returned by the assigned adapter.

Returns:

an integer representing the View type identifier.

onAttached

public void onAttached(RadListView listView)

Called when the behavior is attached to RadListView with addBehavior(ListViewBehavior).

Parameters:

listView - The parent list view

onDetached

public void onDetached(RadListView listView)

Called when the behavior is detached to RadListView with removeBehavior(ListViewBehavior).

Parameters:

listView - The parent list view

onTapUp

public boolean onTapUp(MotionEvent motionEvent)

Called when the tap up gesture is detected by RadListView's ListViewGestureListener.

Parameters:

motionEvent - The motion event

onInterceptTouchEvent

public boolean onInterceptTouchEvent(MotionEvent motionEvent)

onShortPressDrag

public boolean onShortPressDrag(float startX,
                                float startY,
                                float currentX,
                                float currentY)

Called when the drag gesture is detected by RadListView's ListViewGestureListener.

Parameters:

startX - the x coordinate where the gesture started

startY - the y coordinate where the gesture started

currentX - the x coordinate where the gesture occurring now

currentY - the y coordinate where the gesture occurring now

onActionUpOrCancel

public boolean onActionUpOrCancel(boolean isCanceled)

Called when a previous gesture ends on up or cancel.

Parameters:

isCanceled - whether the gesture was cancelled

onLongPress

public void onLongPress(MotionEvent motionEvent)

Called when the long press gesture is detected by RadListView's ListViewGestureListener.

Parameters:

motionEvent - The motion event

onLongPressDrag

public void onLongPressDrag(float startX,
                            float startY,
                            float currentX,
                            float currentY)

Called when the drag gesture is detected by RadListView's ListViewGestureListener which started with long press.

Parameters:

startX - the x coordinate where the gesture started

startY - the y coordinate where the gesture started

currentX - the x coordinate where the gesture occurring now

currentY - the y coordinate where the gesture occurring now

onLongPressDragEnded

public boolean onLongPressDragEnded(boolean isCanceled)

Called when a current gesture combination of long press and drag ends on up or cancel.

Parameters:

isCanceled - whether the gesture was cancelled

onFling

public boolean onFling(MotionEvent motionEvent,
                       MotionEvent motionEvent2,
                       float velocityX,
                       float velocityY)

Called when the fling gesture is detected by RadListView's ListViewGestureListener.

Parameters:

motionEvent - The first down motion event that started the fling.

motionEvent2 - The move motion event that triggered the current onFling.

velocityX - The velocity of this fling measured in pixels per second along the x axis.

velocityY - The velocity of this fling measured in pixels per second along the y axis.

onScrolled

public void onScrolled(int dx,
                       int dy)

onDispatchDraw

public void onDispatchDraw(Canvas canvas)

Called when RadListView's onDispatchDraw method is called.

Parameters:

canvas - the canvas on which to draw the view

isInProgress

public boolean isInProgress()

Returns true if the current behavior is in progress.