com.bignerdranch.expandablerecyclerview.ViewHolder

Class ParentViewHolder

java.lang.Object

RecyclerView.ViewHolder

com.bignerdranch.expandablerecyclerview.ViewHolder.ParentViewHolder

All Implemented Interfaces:

android.view.View.OnClickListener

public class ParentViewHolder
extends RecyclerView.ViewHolder
implements android.view.View.OnClickListener

ViewHolder for a ParentListItem Keeps track of expanded state and holds callbacks which can be used to trigger expansion-based events.

Since:

5/27/2015

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	ParentViewHolder.ParentListItemExpandCollapseListener Empowers ExpandableRecyclerAdapter implementations to be notified of expand/collapse state change events.

Constructor Summary

Constructors

Constructor and Description
ParentViewHolder(android.view.View itemView) Default constructor.

Method Summary

Modifier and Type	Method and Description
protected void	collapseView() Triggers collapse of the parent.
protected void	expandView() Triggers expansion of the parent.
ParentViewHolder.ParentListItemExpandCollapseListener	getParentListItemExpandCollapseListener() Getter for the ParentViewHolder.ParentListItemExpandCollapseListener implemented in ExpandableRecyclerAdapter.
boolean	isExpanded() Returns expanded state for the ParentListItem corresponding to this ParentViewHolder.
void	onClick(android.view.View v) View.OnClickListener to listen for click events on the entire parent View.
void	onExpansionToggled(boolean expanded) Callback triggered when expansion state is changed, but not during initialization.
void	setExpanded(boolean expanded) Setter method for expanded state, used for initialization of expanded state.
void	setMainItemClickToExpand() Sets a View.OnClickListener on the entire parent view to trigger expansion.
void	setParentListItemExpandCollapseListener(ParentViewHolder.ParentListItemExpandCollapseListener parentListItemExpandCollapseListener) Setter for the ParentViewHolder.ParentListItemExpandCollapseListener implemented in ExpandableRecyclerAdapter.
boolean	shouldItemViewClickToggleExpansion() Used to determine whether a click in the entire parent View should trigger row expansion.

Methods inherited from class java.lang.Object

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

Constructor Detail

ParentViewHolder

public ParentViewHolder(android.view.View itemView)

Default constructor.

Parameters:

itemView - The View being hosted in this ViewHolder

Method Detail

setMainItemClickToExpand

public void setMainItemClickToExpand()

Sets a View.OnClickListener on the entire parent view to trigger expansion.

isExpanded

public boolean isExpanded()

Returns expanded state for the ParentListItem corresponding to this ParentViewHolder.

Returns:

true if expanded, false if not

setExpanded

public void setExpanded(boolean expanded)

Setter method for expanded state, used for initialization of expanded state. changes to the state are given in onExpansionToggled(boolean)

Parameters:

expanded - true if expanded, false if not

onExpansionToggled

public void onExpansionToggled(boolean expanded)

Callback triggered when expansion state is changed, but not during initialization.

Useful for implementing animations on expansion.

Parameters:

expanded - true if view is expanded before expansion is toggled, false if not

getParentListItemExpandCollapseListener

public ParentViewHolder.ParentListItemExpandCollapseListener getParentListItemExpandCollapseListener()

Getter for the ParentViewHolder.ParentListItemExpandCollapseListener implemented in ExpandableRecyclerAdapter.

Returns:

The ParentViewHolder.ParentListItemExpandCollapseListener set in the ParentViewHolder

setParentListItemExpandCollapseListener

public void setParentListItemExpandCollapseListener(ParentViewHolder.ParentListItemExpandCollapseListener parentListItemExpandCollapseListener)

Setter for the ParentViewHolder.ParentListItemExpandCollapseListener implemented in ExpandableRecyclerAdapter.

Parameters:

parentListItemExpandCollapseListener - The ParentViewHolder.ParentListItemExpandCollapseListener to set on the ParentViewHolder

onClick

public void onClick(android.view.View v)

View.OnClickListener to listen for click events on the entire parent View.

Only registered if shouldItemViewClickToggleExpansion() is true.

Specified by:

onClick in interface android.view.View.OnClickListener

Parameters:

v - The View that is the trigger for expansion

shouldItemViewClickToggleExpansion

public boolean shouldItemViewClickToggleExpansion()

Used to determine whether a click in the entire parent View should trigger row expansion.

If you return false, you can call expandView() to trigger an expansion in response to a another event or collapseView() to trigger a collapse.

Returns:

true to set an View.OnClickListener on the item view

expandView

protected void expandView()

Triggers expansion of the parent.

collapseView

protected void collapseView()

Triggers collapse of the parent.