GLPhotoView.java 6.83 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226
package com.theta.glview;

import android.content.Context;
import android.opengl.GLSurfaceView;
import android.os.Handler;
import android.util.AttributeSet;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.view.ScaleGestureDetector;
import android.widget.Scroller;
import com.theta.model.Constants;
import com.theta.model.Photo;
import com.theta.model.RotateInertia;

/**
 * View class for photo display
 */
public class GLPhotoView extends GLSurfaceView {

    private static final int ANIMATION_INTERVAL = 10;

    private GLRenderer mRenderer = null;

    private GestureDetector mGestureDetector;
    private ScaleGestureDetector mScaleGestureDetector;

    private Scroller mScroller = null;

    private float mPrevX, mPrevY;

    private RotateInertia mRotateInertia = RotateInertia.INERTIA_0;

    /**
     * Constructor
     * @param context Context
     */
    public GLPhotoView(Context context) {
        this(context, null);

    }

    /**
     * Constructor
     * @param context Context
     * @param attrs Argument for resource
     */
    public GLPhotoView(Context context, AttributeSet attrs) {
        super(context, attrs);
        initialize(context);
    }


    /**
     * onTouchEvent Event listener
     * @param event Event object
     * @return Process continuation judgment value
     */
    @Override
    public boolean onTouchEvent(MotionEvent event) {

        boolean ret = false;
        mScaleGestureDetector.onTouchEvent(event);
        if (!mScaleGestureDetector.isInProgress()) {
            ret = mGestureDetector.onTouchEvent(event);
            if (!ret) {
                super.onTouchEvent(event);
            }
        }
        return ret;
    }


    private void initialize(Context context) {

        setEGLContextClientVersion(2);

        mRenderer = new GLRenderer();
        setRenderer(mRenderer);

        setLongClickable(true);

        mGestureDetector = new GestureDetector(context, new GestureDetector.OnGestureListener() {
            private final int SWIPE_MAX_OF_PATH_X = 100;
            private final int SWIPE_MAX_OF_PATH_Y = 100;

            final Handler handler = new Handler();

            @Override
            public boolean onSingleTapUp(MotionEvent e) {
                return false;
            }

            @Override
            public void onShowPress(MotionEvent e) {
                return;
            }

            @Override
            public void onLongPress(MotionEvent e) {
                return;
            }

            @Override
            public boolean onDown(MotionEvent e) {

                if (null != mScroller && !mScroller.isFinished()) {
                    mScroller.abortAnimation();
                    handler.removeCallbacksAndMessages(null);
                }

                return true;
            }

            @Override
            public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {

                boolean ret = false;

                if (null != mScroller && !mScroller.isFinished()) {
                    mScroller.abortAnimation();
                }

                if ((Math.abs(distanceX) > SWIPE_MAX_OF_PATH_X ) || (Math.abs(distanceY) > SWIPE_MAX_OF_PATH_Y )) {
                    ret = false;
                } else {
                    float diffX = distanceX / Constants.ON_SCROLL_DIVIDER_X;
                    float diffY = distanceY / Constants.ON_SCROLL_DIVIDER_Y;

                    if (Math.abs(diffX) < Constants.THRESHOLD_SCROLL_X) {
                        diffX = 0.0f;
                    }
                    if (Math.abs(diffY) < Constants.THRESHOLD_SCROLL_Y) {
                        diffY = 0.0f;
                    }

                    if (null != mRenderer) {
                        mRenderer.rotate(diffX, -diffY);
                    }
                    ret = true;
                }

                return ret;
            }


            @Override
            public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {

                mScroller.fling((int)e2.getX(), (int)e2.getY(), (int)velocityX, (int)velocityY, 0, getWidth(), 0, getHeight());
                mPrevX = e2.getX();
                mPrevY = e2.getY();

                handler.post(new Runnable() {
                    @Override
                    public void run() {
                        if (mRotateInertia == RotateInertia.INERTIA_0) {
                            // do nothing
                        }
                        else {
                            mScroller.computeScrollOffset();
                            float diffX = mScroller.getCurrX() - mPrevX;
                            float diffY = mScroller.getCurrY() - mPrevY;
                            mPrevX = mScroller.getCurrX();
                            mPrevY = mScroller.getCurrY();

                            if (mRotateInertia == RotateInertia.INERTIA_50) {
                                diffX = diffX / Constants.ON_FLING_DIVIDER_X_FOR_INERTIA_50;
                                diffY = diffY / Constants.ON_FLING_DIVIDER_Y_FOR_INERTIA_50;
                            }
                            else {
                                diffX = diffX / Constants.ON_FLING_DIVIDER_X_FOR_INERTIA_100;
                                diffY = diffY / Constants.ON_FLING_DIVIDER_Y_FOR_INERTIA_100;
                            }
                            mRenderer.rotate((float) -diffX, (float) diffY);

                            if (!mScroller.isFinished()) {
                                handler.postDelayed(this, ANIMATION_INTERVAL);
                            }
                        }
                    }
                });

                return true;
            }
        });

        mScaleGestureDetector = new ScaleGestureDetector(context, new ScaleGestureDetector.SimpleOnScaleGestureListener() {
            @Override
            public boolean onScale(ScaleGestureDetector detector) {

                float scale = detector.getScaleFactor();

                if (null != mRenderer) {
                    mRenderer.scale(scale);
                }

                return true;
            }
        });

        mScroller = new Scroller(context);

        return;
    }


    /**
     * Texture setting method
     * @param thumbnail Photo object for texture
     */
    public void setTexture(Photo thumbnail) {
        mRenderer.setTexture(thumbnail);
        return;
    }


    /**
     * Inertia setting method
     * @param mRotateInertia Setting inertia value
     */
    public void setmRotateInertia(RotateInertia mRotateInertia) {
        this.mRotateInertia = mRotateInertia;
        return;
    }

}