Android Open Source - Blufpoker My G L Surface View

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License

The source code is released under:

Apache License

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Java Source Code

/*
 * Copyright (C) 2011 The Android Open Source Project
 *// www. ja  va  2  s. c  om
 * 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 org.stofkat.blufpoker;

import android.content.Context;
import android.opengl.GLSurfaceView;
import android.util.AttributeSet;
import android.view.MotionEvent;

/**
 * A view container where OpenGL ES graphics can be drawn on screen.
 * This view can also be used to capture touch events, such as a user
 * interacting with drawn objects.
 */
public class MyGLSurfaceView extends GLSurfaceView {

  // Set the Renderer for drawing on the GLSurfaceView
    private final MyGLRenderer mRenderer = new MyGLRenderer();

    public MyGLSurfaceView(Context context) {
        super(context);
        init();
    }
    
    public MyGLSurfaceView(Context context, AttributeSet attrs) {
    super(context, attrs);
    init();
  }

  public MyGLSurfaceView(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs);
    init();
  }
    
    public void init() {
      // Create an OpenGL ES 2.0 context.
      setEGLContextClientVersion(2);
      
//      mRenderer = new MyGLRenderer();
      setRenderer(mRenderer);
      
      // Render the view only when there is a change in the drawing data
      setRenderMode(GLSurfaceView.RENDERMODE_WHEN_DIRTY);
      
    }

    private final float TOUCH_SCALE_FACTOR = 180.0f / 320;
    private float mPreviousX;
    private float mPreviousY;

    @Override
    public boolean onTouchEvent(MotionEvent e) {
        // MotionEvent reports input details from the touch screen
        // and other input controls. In this case, you are only
        // interested in events where the touch position changed.

        float x = e.getX();
        float y = e.getY();

        switch (e.getAction()) {
            case MotionEvent.ACTION_MOVE:

                float dx = x - mPreviousX;
                float dy = y - mPreviousY;

                // reverse direction of rotation above the mid-line
                if (y > getHeight() / 2) {
                    dx = dx * -1 ;
                }

                // reverse direction of rotation to left of the mid-line
                if (x < getWidth() / 2) {
                    dy = dy * -1 ;
                }

                mRenderer.setAngle(
                        mRenderer.getAngle() +
                        ((dx + dy) * TOUCH_SCALE_FACTOR));  // = 180.0f / 320
                requestRender();
        }

        mPreviousX = x;
        mPreviousY = y;
        return true;
    }

}

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