michael@0: /* -*- Mode: Java; c-basic-offset: 4; tab-width: 20; indent-tabs-mode: nil; -*-
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: package org.mozilla.gecko.widget;
michael@0: 
michael@0: import org.mozilla.gecko.menu.GeckoMenu;
michael@0: import org.mozilla.gecko.menu.GeckoMenuInflater;
michael@0: import org.mozilla.gecko.menu.MenuPanel;
michael@0: import org.mozilla.gecko.menu.MenuPopup;
michael@0: 
michael@0: import android.content.Context;
michael@0: import android.view.Menu;
michael@0: import android.view.MenuInflater;
michael@0: import android.view.MenuItem;
michael@0: import android.view.View;
michael@0: 
michael@0: /**
michael@0:  * A PopupMenu that uses the custom GeckoMenu. This menu is
michael@0:  * usually tied to an anchor, and show as a dropdrown from the anchor.
michael@0:  */
michael@0: public class GeckoPopupMenu implements GeckoMenu.Callback,
michael@0:                                        GeckoMenu.MenuPresenter {
michael@0: 
michael@0:     // An interface for listeners for dismissal.
michael@0:     public static interface OnDismissListener {
michael@0:         public boolean onDismiss(GeckoMenu menu);
michael@0:     }
michael@0: 
michael@0:     // An interface for listeners for menu item click events.
michael@0:     public static interface OnMenuItemClickListener {
michael@0:         public boolean onMenuItemClick(MenuItem item);
michael@0:     }
michael@0: 
michael@0:     private View mAnchor;
michael@0: 
michael@0:     private MenuPopup mMenuPopup;
michael@0:     private MenuPanel mMenuPanel;
michael@0: 
michael@0:     private GeckoMenu mMenu;
michael@0:     private GeckoMenuInflater mMenuInflater;
michael@0: 
michael@0:     private OnDismissListener mDismissListener;
michael@0:     private OnMenuItemClickListener mClickListener;
michael@0: 
michael@0:     public GeckoPopupMenu(Context context) {
michael@0:         initialize(context, null);
michael@0:     }
michael@0: 
michael@0:     public GeckoPopupMenu(Context context, View anchor) {
michael@0:         initialize(context, anchor);
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * This method creates an empty menu and attaches the necessary listeners.
michael@0:      * If an anchor is supplied, it is stored as well.
michael@0:      */
michael@0:     private void initialize(Context context, View anchor) {
michael@0:         mMenu = new GeckoMenu(context, null);
michael@0:         mMenu.setCallback(this);
michael@0:         mMenu.setMenuPresenter(this);
michael@0:         mMenuInflater = new GeckoMenuInflater(context);
michael@0: 
michael@0:         mMenuPopup = new MenuPopup(context);
michael@0:         mMenuPanel = new MenuPanel(context, null);
michael@0: 
michael@0:         mMenuPanel.addView(mMenu);
michael@0:         mMenuPopup.setPanelView(mMenuPanel);
michael@0: 
michael@0:         setAnchor(anchor);
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * Returns the menu that is current being shown.
michael@0:      *
michael@0:      * @return The menu being shown.
michael@0:      */
michael@0:     public Menu getMenu() {
michael@0:         return mMenu;
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * Returns the menu inflater that was used to create the menu.
michael@0:      *
michael@0:      * @return The menu inflater used.
michael@0:      */
michael@0:     public MenuInflater getMenuInflater() {
michael@0:         return mMenuInflater;
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * Inflates a menu resource to the menu using the menu inflater.
michael@0:      *
michael@0:      * @param menuRes The menu resource to be inflated.
michael@0:      */
michael@0:     public void inflate(int menuRes) {
michael@0:         if (menuRes > 0) {
michael@0:             mMenuInflater.inflate(menuRes, mMenu);
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * Set a different anchor after the menu is inflated.
michael@0:      *
michael@0:      * @param anchor The new anchor for the popup.
michael@0:      */
michael@0:     public void setAnchor(View anchor) {
michael@0:         mAnchor = anchor;
michael@0:     }
michael@0: 
michael@0:     public void setOnDismissListener(OnDismissListener listener) {
michael@0:         mDismissListener = listener;
michael@0:     }
michael@0: 
michael@0:     public void setOnMenuItemClickListener(OnMenuItemClickListener listener) {
michael@0:         mClickListener = listener;
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * Show the inflated menu.
michael@0:      */
michael@0:     public void show() {
michael@0:         if (!mMenuPopup.isShowing())
michael@0:             mMenuPopup.showAsDropDown(mAnchor);
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * Hide the inflated menu.
michael@0:      */
michael@0:     public void dismiss() {
michael@0:         if (mMenuPopup.isShowing()) {
michael@0:             mMenuPopup.dismiss();
michael@0: 
michael@0:             if (mDismissListener != null)
michael@0:                 mDismissListener.onDismiss(mMenu);
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public boolean onMenuItemSelected(MenuItem item) {
michael@0:         if (mClickListener != null)
michael@0:             return mClickListener.onMenuItemClick(item);
michael@0: 
michael@0:         return false;
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public void openMenu() {
michael@0:         show();
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public void showMenu(View menu) {
michael@0:         mMenuPanel.removeAllViews();
michael@0:         mMenuPanel.addView(menu);
michael@0: 
michael@0:         openMenu();
michael@0:     }
michael@0: 
michael@0:     @Override
michael@0:     public void closeMenu() {
michael@0:         dismiss();
michael@0:     }
michael@0: }