MenuDialogHelper.java

/*
 * Copyright (C) 2006 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 com.tencent.tws.assistant.internal.view.menu;

import android.app.Dialog;
import android.content.DialogInterface;
import android.os.IBinder;
import android.view.Gravity;
import android.view.KeyEvent;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;

import com.tencent.tws.assistant.app.AlertDialog;
import com.tencent.tws.sharelib.R;

/**
 * Helper for menus that appear as Dialogs (context and submenus).
 * 
 * @hide
 */
public class MenuDialogHelper implements DialogInterface.OnKeyListener, DialogInterface.OnClickListener,
		DialogInterface.OnDismissListener, MenuPresenter.Callback {
	private MenuBuilder mMenu;
	private AlertDialog mDialog;
	ListMenuPresenter mPresenter;
	private MenuPresenter.Callback mPresenterCallback;

	public MenuDialogHelper(MenuBuilder menu) {
		mMenu = menu;
	}

	/**
	 * Shows menu as a dialog.
	 * 
	 * @param windowToken
	 *            Optional token to assign to the window.
	 */
	public void show(IBinder windowToken) {
		// Many references to mMenu, create local reference
		final MenuBuilder menu = mMenu;

		// Get the builder for the dialog
		final AlertDialog.Builder builder = new AlertDialog.Builder(menu.getContext(),
				R.style.Theme_tws_Second_Dialog_Alert_Context);

		mPresenter = new ListMenuPresenter(builder.getContext(), R.layout.popup_menu_item_layout);

		mPresenter.setCallback(this);
		mMenu.addMenuPresenter(mPresenter);
		builder.setAdapter(mPresenter.getAdapter(), this);

		// Set the title
		/*
		 * final View headerView = menu.getHeaderView(); if (headerView != null)
		 * { // Menu's client has given a custom header view, use it
		 * builder.setCustomTitle(headerView); } else { // Otherwise use the
		 * (text) title and icon
		 * builder.setIcon(menu.getHeaderIcon()).setTitle(menu
		 * .getHeaderTitle()); }
		 */

		// Set the key listener
		builder.setOnKeyListener(this);

		// Show the menu
		mDialog = builder.create();
		mDialog.setOnDismissListener(this);

		mDialog.setCanceledOnTouchOutside(true);
		/* tws-start::change the menu to tws style */
		WindowManager.LayoutParams lp = mDialog.getWindow().getAttributes();
		lp.type = WindowManager.LayoutParams.TYPE_APPLICATION_ATTACHED_DIALOG;
		if (windowToken != null) {
			lp.token = windowToken;
		}
		lp.flags |= WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM;
		lp.gravity = Gravity.CENTER | Gravity.BOTTOM;
		lp.dimAmount = 0.6f;
		lp.windowAnimations = R.style.Animation_DropDownUp_tws;
		/* tws-end::change the menu to tws style::froyohuang 2013.4.7 */

		// tws-start::set the background of the list menu 2013-06-17
		if (mDialog.getListView() != null) {
			mDialog.getListView().setBackgroundResource(R.drawable.list_menu_bg_holo_light);
			mDialog.getListView().useShapedSelector(true);
			mDialog.getListView().setSelector(R.drawable.list_menu_selector, R.drawable.list_menu_selector_top,
					R.drawable.list_menu_selector_bottom);
		}
		// tws-end::set the background of the list menu 2013-06-17

		mDialog.show();
	}

	public boolean onKey(DialogInterface dialog, int keyCode, KeyEvent event) {
		if (keyCode == KeyEvent.KEYCODE_MENU || keyCode == KeyEvent.KEYCODE_BACK) {
			if (event.getAction() == KeyEvent.ACTION_DOWN && event.getRepeatCount() == 0) {
				Window win = mDialog.getWindow();
				if (win != null) {
					View decor = win.getDecorView();
					if (decor != null) {
						KeyEvent.DispatcherState ds = decor.getKeyDispatcherState();
						if (ds != null) {
							ds.startTracking(event, this);
							return true;
						}
					}
				}
			} else if (event.getAction() == KeyEvent.ACTION_UP && !event.isCanceled()) {
				Window win = mDialog.getWindow();
				if (win != null) {
					View decor = win.getDecorView();
					if (decor != null) {
						KeyEvent.DispatcherState ds = decor.getKeyDispatcherState();
						if (ds != null && ds.isTracking(event)) {
							mMenu.twsClose(true);
							dialog.dismiss();
							return true;
						}
					}
				}
			}
		}

		// Menu shortcut matching
		return mMenu.performShortcut(keyCode, event, 0);

	}

	public void setPresenterCallback(MenuPresenter.Callback cb) {
		mPresenterCallback = cb;
	}

	/**
	 * Dismisses the menu's dialog.
	 * 
	 * @see Dialog#dismiss()
	 */
	public void dismiss() {
		if (mDialog != null) {
			mDialog.dismiss();
		}
	}

	@Override
	public void onDismiss(DialogInterface dialog) {
		mPresenter.onCloseMenu(mMenu, true);
	}

	@Override
	public void onCloseMenu(MenuBuilder menu, boolean allMenusAreClosing) {
		if (allMenusAreClosing || menu == mMenu) {
			dismiss();
		}
		if (mPresenterCallback != null) {
			mPresenterCallback.onCloseMenu(menu, allMenusAreClosing);
		}
	}

	@Override
	public boolean onOpenSubMenu(MenuBuilder subMenu) {
		if (mPresenterCallback != null) {
			return mPresenterCallback.onOpenSubMenu(subMenu);
		}
		return false;
	}

	public void onClick(DialogInterface dialog, int which) {
		mMenu.performItemAction((MenuItemImpl) mPresenter.getAdapter().getItem(which), 0);
	}
}