com.actionbarsherlock.internal.view.menu

Class BaseMenuPresenter

java.lang.Object

com.actionbarsherlock.internal.view.menu.BaseMenuPresenter

All Implemented Interfaces:

MenuPresenter

Direct Known Subclasses:

ActionMenuPresenter

public abstract class BaseMenuPresenter
extends java.lang.Object
implements MenuPresenter

Base class for MenuPresenters that have a consistent container view and item views. Behaves similarly to an AdapterView in that existing item views will be reused if possible when items change.

Nested Class Summary

Nested classes/interfaces inherited from interface com.actionbarsherlock.internal.view.menu.MenuPresenter

MenuPresenter.Callback

Field Summary

Fields

Modifier and Type	Field and Description
protected android.content.Context	mContext
protected android.view.LayoutInflater	mInflater
protected MenuBuilder	mMenu
protected MenuView	mMenuView
protected android.content.Context	mSystemContext
protected android.view.LayoutInflater	mSystemInflater

Constructor Summary

Constructors

Constructor and Description
BaseMenuPresenter(android.content.Context context, int menuLayoutRes, int itemLayoutRes) Construct a new BaseMenuPresenter.

Method Summary

Methods

Modifier and Type	Method and Description
protected void	addItemView(android.view.View itemView, int childIndex) Add an item view at the given index.
abstract void	bindItemView(MenuItemImpl item, MenuView.ItemView itemView) Bind item data to an existing item view.
boolean	collapseItemActionView(MenuBuilder menu, MenuItemImpl item) Called when a menu item with a collapsable action view should collapse its action view.
MenuView.ItemView	createItemView(android.view.ViewGroup parent) Create a new item view that can be re-bound to other item data later.
boolean	expandItemActionView(MenuBuilder menu, MenuItemImpl item) Called when a menu item with a collapsable action view should expand its action view.
protected boolean	filterLeftoverView(android.view.ViewGroup parent, int childIndex) Filter the child view at index and remove it if appropriate.
boolean	flagActionItems() Called by Menu implementations to flag items that will be shown as actions.
int	getId() Returns an ID for determining how to save/restore instance state.
android.view.View	getItemView(MenuItemImpl item, android.view.View convertView, android.view.ViewGroup parent) Prepare an item view for use.
MenuView	getMenuView(android.view.ViewGroup root) Retrieve a MenuView to display the menu specified in #initForMenu(Context, Menu).
void	initForMenu(android.content.Context context, MenuBuilder menu) Initialize this presenter for the given context and menu.
void	onCloseMenu(MenuBuilder menu, boolean allMenusAreClosing) Called by Menu implementations to indicate that a menu or submenu is closing.
boolean	onSubMenuSelected(SubMenuBuilder menu) Called by Menu implementations to indicate that a submenu item has been selected.
void	setCallback(MenuPresenter.Callback cb) Set a callback object that will be notified of menu events related to this specific presentation.
void	setId(int id)
boolean	shouldIncludeItem(int childIndex, MenuItemImpl item) Filter item by child index and item data.
void	updateMenuView(boolean cleared) Reuses item views when it can

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.actionbarsherlock.internal.view.menu.MenuPresenter

onRestoreInstanceState, onSaveInstanceState

Field Detail

mSystemContext

protected android.content.Context mSystemContext

mContext

protected android.content.Context mContext

mMenu

protected MenuBuilder mMenu

mSystemInflater

protected android.view.LayoutInflater mSystemInflater

mInflater

protected android.view.LayoutInflater mInflater

mMenuView

protected MenuView mMenuView

Constructor Detail

BaseMenuPresenter

public BaseMenuPresenter(android.content.Context context,
                 int menuLayoutRes,
                 int itemLayoutRes)

Construct a new BaseMenuPresenter.

Parameters:

context - Context for generating system-supplied views

menuLayoutRes - Layout resource ID for the menu container view

itemLayoutRes - Layout resource ID for a single item view

Method Detail

initForMenu

public void initForMenu(android.content.Context context,
               MenuBuilder menu)

Description copied from interface: MenuPresenter

Initialize this presenter for the given context and menu. This method is called by MenuBuilder when a presenter is added. See MenuBuilder.addMenuPresenter(MenuPresenter)

Specified by:

initForMenu in interface MenuPresenter

Parameters:

context - Context for this presenter; used for view creation and resource management

menu - Menu to host

getMenuView

public MenuView getMenuView(android.view.ViewGroup root)

Description copied from interface: MenuPresenter

Retrieve a MenuView to display the menu specified in #initForMenu(Context, Menu).

Specified by:

getMenuView in interface MenuPresenter

Parameters:

root - Intended parent of the MenuView.

Returns:

A freshly created MenuView.

updateMenuView

public void updateMenuView(boolean cleared)

Reuses item views when it can

Specified by:

updateMenuView in interface MenuPresenter

Parameters:

cleared - true if the menu was entirely cleared

addItemView

protected void addItemView(android.view.View itemView,
               int childIndex)

Add an item view at the given index.

Parameters:

itemView - View to add

childIndex - Index within the parent to insert at

filterLeftoverView

protected boolean filterLeftoverView(android.view.ViewGroup parent,
                         int childIndex)

Filter the child view at index and remove it if appropriate.

Parameters:

parent - Parent to filter from

childIndex - Index to filter

Returns:

true if the child view at index was removed

setCallback

public void setCallback(MenuPresenter.Callback cb)

Description copied from interface: MenuPresenter

Set a callback object that will be notified of menu events related to this specific presentation.

Specified by:

setCallback in interface MenuPresenter

Parameters:

cb - Callback that will be notified of future events

createItemView

public MenuView.ItemView createItemView(android.view.ViewGroup parent)

Create a new item view that can be re-bound to other item data later.

Returns:

The new item view

getItemView

public android.view.View getItemView(MenuItemImpl item,
                            android.view.View convertView,
                            android.view.ViewGroup parent)

Prepare an item view for use. See AdapterView for the basic idea at work here. This may require creating a new item view, but well-behaved implementations will re-use the view passed as convertView if present. The returned view will be populated with data from the item parameter.

Parameters:

item - Item to present

convertView - Existing view to reuse

parent - Intended parent view - use for inflation.

Returns:

View that presents the requested menu item

bindItemView

public abstract void bindItemView(MenuItemImpl item,
                MenuView.ItemView itemView)

Bind item data to an existing item view.

Parameters:

item - Item to bind

itemView - View to populate with item data

shouldIncludeItem

public boolean shouldIncludeItem(int childIndex,
                        MenuItemImpl item)

Filter item by child index and item data.

Parameters:

childIndex - Indended presentation index of this item

item - Item to present

Returns:

true if this item should be included in this menu presentation; false otherwise

onCloseMenu

public void onCloseMenu(MenuBuilder menu,
               boolean allMenusAreClosing)

Description copied from interface: MenuPresenter

Called by Menu implementations to indicate that a menu or submenu is closing. Presenter implementations should close the representation of the menu indicated as necessary and notify a registered callback.

Specified by:

onCloseMenu in interface MenuPresenter

Parameters:

menu - Menu or submenu that is closing.

allMenusAreClosing - True if all associated menus are closing.

onSubMenuSelected

public boolean onSubMenuSelected(SubMenuBuilder menu)

Description copied from interface: MenuPresenter

Called by Menu implementations to indicate that a submenu item has been selected. An active Callback should be notified, and if applicable the presenter should present the submenu.

Specified by:

onSubMenuSelected in interface MenuPresenter

Parameters:

menu - SubMenu being opened

Returns:

true if the the event was handled, false otherwise.

flagActionItems

public boolean flagActionItems()

Description copied from interface: MenuPresenter

Called by Menu implementations to flag items that will be shown as actions.

Specified by:

flagActionItems in interface MenuPresenter

Returns:

true if this presenter changed the action status of any items.

expandItemActionView

public boolean expandItemActionView(MenuBuilder menu,
                           MenuItemImpl item)

Description copied from interface: MenuPresenter

Called when a menu item with a collapsable action view should expand its action view.

Specified by:

expandItemActionView in interface MenuPresenter

Parameters:

menu - Menu containing the item to be expanded

item - Item to be expanded

Returns:

true if this presenter expanded the action view, false otherwise.

collapseItemActionView

public boolean collapseItemActionView(MenuBuilder menu,
                             MenuItemImpl item)

Description copied from interface: MenuPresenter

Called when a menu item with a collapsable action view should collapse its action view.

Specified by:

collapseItemActionView in interface MenuPresenter

Parameters:

menu - Menu containing the item to be collapsed

item - Item to be collapsed

Returns:

true if this presenter collapsed the action view, false otherwise.

getId

public int getId()

Description copied from interface: MenuPresenter

Returns an ID for determining how to save/restore instance state.

Specified by:

getId in interface MenuPresenter

Returns:

a valid ID value.

setId

public void setId(int id)