1/*
2 * Copyright (C) 2007 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package android.view;
18
19import android.content.Context;
20import android.util.AttributeSet;
21import android.util.Log;
22import android.widget.TextView;
23import com.android.frameworks.coretests.R;
24
25import android.os.Bundle;
26import android.widget.Button;
27import android.view.View;
28import android.app.Activity;
29
30/**
31 * Exercise View's ability to change their visibility: GONE, INVISIBLE and
32 * VISIBLE.
33 */
34public class VisibilityCallback extends Activity {
35    private static final boolean DEBUG = false;
36
37    private MonitoredTextView mVictim;
38
39    @Override
40    protected void onCreate(Bundle icicle) {
41        super.onCreate(icicle);
42        setContentView(R.layout.visibility_callback);
43
44        // Find the view whose visibility will change
45        mVictim = (MonitoredTextView)findViewById(R.id.victim);
46
47        // Find our buttons
48        Button visibleButton = (Button) findViewById(R.id.vis);
49        Button invisibleButton = (Button) findViewById(R.id.invis);
50        Button goneButton = (Button) findViewById(R.id.gone);
51
52        // Wire each button to a click listener
53        visibleButton.setOnClickListener(mVisibleListener);
54        invisibleButton.setOnClickListener(mInvisibleListener);
55        goneButton.setOnClickListener(mGoneListener);
56    }
57
58
59    View.OnClickListener mVisibleListener = new View.OnClickListener() {
60        public void onClick(View v) {
61            mVictim.setVisibility(View.VISIBLE);
62        }
63    };
64
65    View.OnClickListener mInvisibleListener = new View.OnClickListener() {
66        public void onClick(View v) {
67            mVictim.setVisibility(View.INVISIBLE);
68        }
69    };
70
71    View.OnClickListener mGoneListener = new View.OnClickListener() {
72        public void onClick(View v) {
73            mVictim.setVisibility(View.GONE);
74        }
75    };
76
77    public static class MonitoredTextView extends TextView {
78        private View mLastVisChangedView;
79        private int mLastChangedVisibility;
80
81        public MonitoredTextView(Context context) {
82            super(context);
83        }
84
85        public MonitoredTextView(Context context, AttributeSet attrs) {
86            super(context, attrs);
87        }
88
89        public MonitoredTextView(Context context, AttributeSet attrs, int defStyle) {
90            super(context, attrs, defStyle);
91        }
92
93        public View getLastVisChangedView() {
94            return mLastVisChangedView;
95        }
96
97        public int getLastChangedVisibility() {
98            return mLastChangedVisibility;
99        }
100
101        @Override
102        protected void onVisibilityChanged(View changedView, int visibility) {
103            mLastVisChangedView = changedView;
104            mLastChangedVisibility = visibility;
105
106            if (DEBUG) {
107                Log.d("viewVis", "visibility: " + visibility);
108            }
109        }
110    }
111}
112