tests/RenderScriptTests/MiscSamples/src/com/example/android/rs/miscsamples/RsListView.java

/*
 * Copyright (C) 2008 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.example.android.rs.miscsamples;
import android.renderscript.RSSurfaceView;
import android.renderscript.RenderScriptGL;

import android.content.Context;
import android.view.MotionEvent;

public class RsListView extends RSSurfaceView {

    public RsListView(Context context) {
        super(context);
        ensureRenderScript();
    }

    private RenderScriptGL mRS;
    private RsListRS mRender;

    private void ensureRenderScript() {
        if (mRS == null) {
            RenderScriptGL.SurfaceConfig sc = new RenderScriptGL.SurfaceConfig();
            mRS = createRenderScriptGL(sc);
            mRender = new RsListRS();
            mRender.init(mRS, getResources());
        }
    }

    @Override
    protected void onAttachedToWindow() {
        super.onAttachedToWindow();
        ensureRenderScript();
    }

    @Override
    protected void onDetachedFromWindow() {
        mRender = null;
        if (mRS != null) {
            mRS = null;
            destroyRenderScriptGL();
        }
    }

    @Override
    public boolean onTouchEvent(MotionEvent ev)
    {
        boolean ret = false;
        int act = ev.getAction();
        if (act == MotionEvent.ACTION_DOWN) {
            mRender.onActionDown((int)ev.getX(), (int)ev.getY());
            ret = true;
        } else if (act == MotionEvent.ACTION_MOVE) {
            mRender.onActionMove((int)ev.getX(), (int)ev.getY());
            ret = true;
        }

        return ret;
    }
}