1/*
2 * Copyright (C) 2011 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 androidx.media.filterpacks.text;
18
19import android.view.View;
20import android.widget.TextView;
21
22import androidx.media.filterfw.FrameType;
23import androidx.media.filterfw.FrameValue;
24import androidx.media.filterfw.MffContext;
25import androidx.media.filterfw.Signature;
26import androidx.media.filterfw.ViewFilter;
27
28public class TextViewTarget extends ViewFilter {
29
30    private TextView mTextView = null;
31
32    public TextViewTarget(MffContext context, String name) {
33        super(context, name);
34    }
35
36    @Override
37    public void onBindToView(View view) {
38        if (view instanceof TextView) {
39            mTextView = (TextView)view;
40        } else {
41            throw new IllegalArgumentException("View must be a TextView!");
42        }
43    }
44
45    @Override
46    public Signature getSignature() {
47        return new Signature()
48            .addInputPort("text", Signature.PORT_REQUIRED, FrameType.single(String.class))
49            .disallowOtherPorts();
50    }
51
52    @Override
53    protected void onProcess() {
54        FrameValue textFrame = getConnectedInputPort("text").pullFrame().asFrameValue();
55        final String text = (String)textFrame.getValue();
56        if (mTextView != null) {
57            mTextView.post(new Runnable() {
58                @Override
59                public void run() {
60                    mTextView.setText(text);
61                }
62            });
63        }
64    }
65}
66
67