/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.support.v4.internal.view;
import android.support.v4.view.ActionProvider;
import android.support.v4.view.MenuItemCompat;
import android.view.MenuItem;
import android.view.View;
/**
* Interface for direct access to a previously created menu item.
*
* This version extends the one available in the framework to ensures that any necessary
* elements added in later versions of the framework, are available for all platforms.
*
* @see android.view.MenuItem
* @hide
*/
public interface SupportMenuItem extends android.view.MenuItem {
/*
* These should be kept in sync with attrs.xml enum constants for showAsAction
*/
/**
* Never show this item as a button in an Action Bar.
*/
public static final int SHOW_AS_ACTION_NEVER = 0;
/**
* Show this item as a button in an Action Bar if the system decides there is room for it.
*/
public static final int SHOW_AS_ACTION_IF_ROOM = 1;
/**
* Always show this item as a button in an Action Bar.
* Use sparingly! If too many items are set to always show in the Action Bar it can
* crowd the Action Bar and degrade the user experience on devices with smaller screens.
* A good rule of thumb is to have no more than 2 items set to always show at a time.
*/
public static final int SHOW_AS_ACTION_ALWAYS = 2;
/**
* When this item is in the action bar, always show it with a text label even if it also has an
* icon specified.
*/
public static final int SHOW_AS_ACTION_WITH_TEXT = 4;
/**
* This item's action view collapses to a normal menu item. When expanded, the action view
* temporarily takes over a larger segment of its container.
*/
public static final int SHOW_AS_ACTION_COLLAPSE_ACTION_VIEW = 8;
/**
* Sets how this item should display in the presence of an Action Bar. The parameter actionEnum
* is a flag set. One of {@link #SHOW_AS_ACTION_ALWAYS}, {@link #SHOW_AS_ACTION_IF_ROOM}, or
* {@link #SHOW_AS_ACTION_NEVER} should be used, and you may optionally OR the value with {@link
* #SHOW_AS_ACTION_WITH_TEXT}. SHOW_AS_ACTION_WITH_TEXT requests that when the item is shown as
* an action, it should be shown with a text label.
*
* @param actionEnum How the item should display. One of {@link #SHOW_AS_ACTION_ALWAYS}, {@link
* #SHOW_AS_ACTION_IF_ROOM}, or {@link #SHOW_AS_ACTION_NEVER}.
* SHOW_AS_ACTION_NEVER is the default.
* @see android.app.ActionBar
* @see #setActionView(View)
*/
public void setShowAsAction(int actionEnum);
/**
* Sets how this item should display in the presence of an Action Bar.
* The parameter actionEnum is a flag set. One of {@link #SHOW_AS_ACTION_ALWAYS},
* {@link #SHOW_AS_ACTION_IF_ROOM}, or {@link #SHOW_AS_ACTION_NEVER} should
* be used, and you may optionally OR the value with {@link #SHOW_AS_ACTION_WITH_TEXT}.
* SHOW_AS_ACTION_WITH_TEXT requests that when the item is shown as an action,
* it should be shown with a text label.
*
* <p>Note: This method differs from {@link #setShowAsAction(int)} only in that it
* returns the current MenuItem instance for call chaining.
*
* @param actionEnum How the item should display. One of {@link #SHOW_AS_ACTION_ALWAYS}, {@link
* #SHOW_AS_ACTION_IF_ROOM}, or {@link #SHOW_AS_ACTION_NEVER}.
* SHOW_AS_ACTION_NEVER is the default.
* @return This MenuItem instance for call chaining.
* @see android.app.ActionBar
* @see #setActionView(View)
*/
public MenuItem setShowAsActionFlags(int actionEnum);
/**
* Set an action view for this menu item. An action view will be displayed in place
* of an automatically generated menu item element in the UI when this item is shown
* as an action within a parent.
*
* <p><strong>Note:</strong> Setting an action view overrides the action provider
* provider set via {@link #setSupportActionProvider(android.support.v4.view.ActionProvider)}. </p>
*
* @param view View to use for presenting this item to the user.
* @return This Item so additional setters can be called.
* @see #setShowAsAction(int)
*/
public MenuItem setActionView(View view);
/**
* Set an action view for this menu item. An action view will be displayed in place
* of an automatically generated menu item element in the UI when this item is shown
* as an action within a parent.
*
* <p><strong>Note:</strong> Setting an action view overrides the action provider
* provider set via {@link #setSupportActionProvider(android.support.v4.view.ActionProvider)}. </p>
*
* @param resId Layout resource to use for presenting this item to the user.
* @return This Item so additional setters can be called.
* @see #setShowAsAction(int)
*/
public MenuItem setActionView(int resId);
/**
* Returns the currently set action view for this menu item.
*
* @return This item's action view
* @see #setActionView(View)
* @see #setShowAsAction(int)
*/
public View getActionView();
/**
* Sets the {@link android.support.v4.view.ActionProvider} responsible for creating an action view if
* the item is placed on the action bar. The provider also provides a default
* action invoked if the item is placed in the overflow menu.
*
* <p><strong>Note:</strong> Setting an action provider overrides the action view
* set via {@link #setActionView(int)} or {@link #setActionView(View)}.
* </p>
*
* @param actionProvider The action provider.
* @return This Item so additional setters can be called.
* @see android.support.v4.view.ActionProvider
*/
public SupportMenuItem setSupportActionProvider(ActionProvider actionProvider);
/**
* Gets the {@link ActionProvider}.
*
* @return The action provider.
* @see ActionProvider
* @see #setSupportActionProvider(ActionProvider)
*/
public ActionProvider getSupportActionProvider();
/**
* Expand the action view associated with this menu item. The menu item must have an action view
* set, as well as the showAsAction flag {@link #SHOW_AS_ACTION_COLLAPSE_ACTION_VIEW}. If a
* listener has been set using {@link #setSupportOnActionExpandListener(android.support.v4.view.MenuItemCompat.OnActionExpandListener)}
* it will have its {@link android.support.v4.view.MenuItemCompat.OnActionExpandListener#onMenuItemActionExpand(MenuItem)} method
* invoked. The listener may return false from this method to prevent expanding the action view.
*
* @return true if the action view was expanded, false otherwise.
*/
public boolean expandActionView();
/**
* Collapse the action view associated with this menu item. The menu item must have an action
* view set, as well as the showAsAction flag {@link #SHOW_AS_ACTION_COLLAPSE_ACTION_VIEW}. If a
* listener has been set using {@link #setSupportOnActionExpandListener(android.support.v4.view.MenuItemCompat.OnActionExpandListener)}
* it will have its {@link android.support.v4.view.MenuItemCompat.OnActionExpandListener#onMenuItemActionCollapse(MenuItem)} method
* invoked. The listener may return false from this method to prevent collapsing the action
* view.
*
* @return true if the action view was collapsed, false otherwise.
*/
public boolean collapseActionView();
/**
* Returns true if this menu item's action view has been expanded.
*
* @return true if the item's action view is expanded, false otherwise.
* @see #expandActionView()
* @see #collapseActionView()
* @see #SHOW_AS_ACTION_COLLAPSE_ACTION_VIEW
* @see android.support.v4.view.MenuItemCompat.OnActionExpandListener
*/
public boolean isActionViewExpanded();
/**
* Set an {@link android.support.v4.view.MenuItemCompat.OnActionExpandListener} on this menu item to be notified when the associated
* action view is expanded or collapsed. The menu item must be configured to expand or collapse
* its action view using the flag {@link #SHOW_AS_ACTION_COLLAPSE_ACTION_VIEW}.
*
* @param listener Listener that will respond to expand/collapse events
* @return This menu item instance for call chaining
*/
public SupportMenuItem setSupportOnActionExpandListener(MenuItemCompat.OnActionExpandListener listener);
} |
