ActionBarDisplayOptions.java

/*
 * Copyright (C) 2010 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.google.mcommerce.sample.android.chapter04.actionBar;

import android.app.ActionBar;
import android.app.ActionBar.Tab;
import android.app.Activity;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.view.Gravity;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup.LayoutParams;

import com.google.mcommerce.sample.android.R;

/**
 * This demo shows how various action bar display option flags can be combined
 * and their effects.
 */
public class ActionBarDisplayOptions extends Activity implements
		View.OnClickListener, ActionBar.TabListener {
	private View mCustomView;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.c04_action_bar_display_options);

		findViewById(R.id.toggle_home_as_up).setOnClickListener(this);
		findViewById(R.id.toggle_show_home).setOnClickListener(this);
		findViewById(R.id.toggle_use_logo).setOnClickListener(this);
		findViewById(R.id.toggle_show_title).setOnClickListener(this);
		findViewById(R.id.toggle_show_custom).setOnClickListener(this);
		findViewById(R.id.toggle_navigation).setOnClickListener(this);
		findViewById(R.id.cycle_custom_gravity).setOnClickListener(this);

		mCustomView = getLayoutInflater().inflate(
				R.layout.c04_action_bar_display_options_custom, null);
		// Configure several action bar elements that will be toggled by display
		// options.
		final ActionBar bar = getActionBar();
		bar.setCustomView(mCustomView, new ActionBar.LayoutParams(
				LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));

		bar.addTab(bar.newTab().setText("Tab 1").setTabListener(this));
		bar.addTab(bar.newTab().setText("Tab 2").setTabListener(this));
		bar.addTab(bar.newTab().setText("Tab 3").setTabListener(this));
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		getMenuInflater().inflate(R.menu.c04_display_options_actions, menu);
		return true;
	}

	public void onClick(View v) {
		final ActionBar bar = getActionBar();
		int flags = 0;
		switch (v.getId()) {
		case R.id.toggle_home_as_up:
			flags = ActionBar.DISPLAY_HOME_AS_UP;
			break;
		case R.id.toggle_show_home:
			flags = ActionBar.DISPLAY_SHOW_HOME;
			break;
		case R.id.toggle_use_logo:
			flags = ActionBar.DISPLAY_USE_LOGO;
			break;
		case R.id.toggle_show_title:
			flags = ActionBar.DISPLAY_SHOW_TITLE;
			break;
		case R.id.toggle_show_custom:
			flags = ActionBar.DISPLAY_SHOW_CUSTOM;
			break;

		case R.id.toggle_navigation:
			bar.setNavigationMode(bar.getNavigationMode() == ActionBar.NAVIGATION_MODE_STANDARD ? ActionBar.NAVIGATION_MODE_TABS
					: ActionBar.NAVIGATION_MODE_STANDARD);
			return;
		case R.id.cycle_custom_gravity:
			ActionBar.LayoutParams lp = (ActionBar.LayoutParams) mCustomView
					.getLayoutParams();
			int newGravity = 0;
			switch (lp.gravity & Gravity.HORIZONTAL_GRAVITY_MASK) {
			case Gravity.LEFT:
				newGravity = Gravity.CENTER_HORIZONTAL;
				break;
			case Gravity.CENTER_HORIZONTAL:
				newGravity = Gravity.RIGHT;
				break;
			case Gravity.RIGHT:
				newGravity = Gravity.LEFT;
				break;
			}
			lp.gravity = lp.gravity & ~Gravity.HORIZONTAL_GRAVITY_MASK
					| newGravity;
			bar.setCustomView(mCustomView, lp);
			return;
		}

		int change = bar.getDisplayOptions() ^ flags;
		bar.setDisplayOptions(change, flags);
	}

	public void onTabSelected(Tab tab, FragmentTransaction ft) {
	}

	public void onTabUnselected(Tab tab, FragmentTransaction ft) {
	}

	public void onTabReselected(Tab tab, FragmentTransaction ft) {
	}
}