/*
 * Copyright (C) 2007 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.widget.gridview;

import android.app.Instrumentation;
import android.test.ActivityInstrumentationTestCase;
import android.test.suitebuilder.annotation.LargeTest;
import android.test.suitebuilder.annotation.MediumTest;
import android.test.TouchUtils;
import android.view.KeyEvent;
import android.widget.AbsListView;
import android.widget.GridView;

import android.widget.gridview.GridScrollListener;

public class GridScrollListenerTest extends ActivityInstrumentationTestCase<GridScrollListener> implements
        AbsListView.OnScrollListener {
    private GridScrollListener mActivity;
    private GridView mGridView;
    private int mFirstVisibleItem = -1;
    private int mVisibleItemCount = -1;
    private int mTotalItemCount = -1;

    public GridScrollListenerTest() {
        super("com.android.frameworks.coretests", GridScrollListener.class);
    }

    @Override
    protected void setUp() throws Exception {
        super.setUp();

        mActivity = getActivity();
        mGridView = getActivity().getGridView();
        mGridView.setOnScrollListener(this);
    }

    @MediumTest
    public void testPreconditions() {
        assertNotNull(mActivity);
        assertNotNull(mGridView);
        
        assertEquals(0, mFirstVisibleItem);
    }
    
    @LargeTest
    public void testKeyScrolling() {
        Instrumentation inst = getInstrumentation();
        
        int firstVisibleItem = mFirstVisibleItem;
        for (int i = 0; i < mVisibleItemCount * 2; i++) {
            inst.sendCharacterSync(KeyEvent.KEYCODE_DPAD_DOWN);
        }
        inst.waitForIdleSync();
        
        assertTrue("Arrow scroll did not happen", mFirstVisibleItem > firstVisibleItem);
        
        firstVisibleItem = mFirstVisibleItem;
        inst.sendCharacterSync(KeyEvent.KEYCODE_SPACE);
        inst.waitForIdleSync();
        
        assertTrue("Page scroll did not happen", mFirstVisibleItem > firstVisibleItem);
        
        firstVisibleItem = mFirstVisibleItem;
        KeyEvent down = new KeyEvent(0, 0, KeyEvent.ACTION_DOWN, 
                KeyEvent.KEYCODE_DPAD_DOWN, 0, KeyEvent.META_ALT_ON);
        KeyEvent up = new KeyEvent(0, 0, KeyEvent.ACTION_UP, 
                KeyEvent.KEYCODE_DPAD_DOWN, 0, KeyEvent.META_ALT_ON);
        inst.sendKeySync(down);
        inst.sendKeySync(up);
        inst.waitForIdleSync();
        
        assertTrue("Full scroll did not happen", mFirstVisibleItem > firstVisibleItem);
        assertEquals("Full scroll did not happen", mTotalItemCount, 
                mFirstVisibleItem + mVisibleItemCount);    
    }

    @LargeTest
    public void testTouchScrolling() {
        Instrumentation inst = getInstrumentation();
        
        int firstVisibleItem = mFirstVisibleItem;
        TouchUtils.dragQuarterScreenUp(this);
        TouchUtils.dragQuarterScreenUp(this);
        assertTrue("Touch scroll did not happen", mFirstVisibleItem > firstVisibleItem);
    }

    
    public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
        mFirstVisibleItem = firstVisibleItem;
        mVisibleItemCount = visibleItemCount;
        mTotalItemCount = totalItemCount;
    }

    public void onScrollStateChanged(AbsListView view, int scrollState) {
    }
}
