Examples with ScaleGestureDetector android.view.ScaleGestureDetector used on opensource projects

Example 26 with ScaleGestureDetector

use of android.view.ScaleGestureDetector in project PhotoPicker by donglua.

the class TouchImageView method sharedConstructing.

private void sharedConstructing(Context context) {
    super.setClickable(true);
    this.context = context;
    mScaleDetector = new ScaleGestureDetector(context, new ScaleListener());
    mGestureDetector = new GestureDetector(context, new GestureListener());
    matrix = new Matrix();
    prevMatrix = new Matrix();
    m = new float[9];
    normalizedScale = 1;
    if (mScaleType == null) {
        mScaleType = ScaleType.FIT_CENTER;
    }
    minScale = 1;
    maxScale = 3;
    superMinScale = SUPER_MIN_MULTIPLIER * minScale;
    superMaxScale = SUPER_MAX_MULTIPLIER * maxScale;
    setImageMatrix(matrix);
    setScaleType(ScaleType.MATRIX);
    setState(State.NONE);
    onDrawReady = false;
    super.setOnTouchListener(new PrivateOnTouchListener());
}

Example 27 with ScaleGestureDetector

use of android.view.ScaleGestureDetector in project android-vision by googlesamples.

the class BarcodeCaptureActivity method onCreate.

/**
     * Initializes the UI and creates the detector pipeline.
     */
@Override
public void onCreate(Bundle icicle) {
    super.onCreate(icicle);
    setContentView(R.layout.barcode_capture);
    mPreview = (CameraSourcePreview) findViewById(R.id.preview);
    mGraphicOverlay = (GraphicOverlay<BarcodeGraphic>) findViewById(R.id.graphicOverlay);
    // read parameters from the intent used to launch the activity.
    boolean autoFocus = getIntent().getBooleanExtra(AutoFocus, false);
    boolean useFlash = getIntent().getBooleanExtra(UseFlash, false);
    // Check for the camera permission before accessing the camera.  If the
    // permission is not granted yet, request permission.
    int rc = ActivityCompat.checkSelfPermission(this, Manifest.permission.CAMERA);
    if (rc == PackageManager.PERMISSION_GRANTED) {
        createCameraSource(autoFocus, useFlash);
    } else {
        requestCameraPermission();
    }
    gestureDetector = new GestureDetector(this, new CaptureGestureListener());
    scaleGestureDetector = new ScaleGestureDetector(this, new ScaleListener());
    Snackbar.make(mGraphicOverlay, "Tap to capture. Pinch/Stretch to zoom", Snackbar.LENGTH_LONG).show();
}

Example 28 with ScaleGestureDetector

use of android.view.ScaleGestureDetector in project jmonkeyengine by jMonkeyEngine.

the class AndroidInputHandler method addListeners.

protected void addListeners(GLSurfaceView view) {
    view.setOnTouchListener(this);
    view.setOnKeyListener(this);
    AndroidGestureProcessor gestureHandler = new AndroidGestureProcessor(touchInput);
    touchInput.setGestureDetector(new GestureDetector(view.getContext(), gestureHandler));
    touchInput.setScaleDetector(new ScaleGestureDetector(view.getContext(), gestureHandler));
}

Example 29 with ScaleGestureDetector

use of android.view.ScaleGestureDetector in project Klyph by jonathangerbaud.

the class TouchImageView method sharedConstructing.

private void sharedConstructing(Context context) {
    super.setClickable(true);
    this.context = context;
    mScaleDetector = new ScaleGestureDetector(context, new ScaleListener());
    matrix.setTranslate(1f, 1f);
    m = new float[9];
    setImageMatrix(matrix);
    setScaleType(ScaleType.MATRIX);
    setOnTouchListener(new OnTouchListener() {

        @Override
        public boolean onTouch(View v, MotionEvent event) {
            mScaleDetector.onTouchEvent(event);
            matrix.getValues(m);
            float x = m[Matrix.MTRANS_X];
            float y = m[Matrix.MTRANS_Y];
            PointF curr = new PointF(event.getX(), event.getY());
            switch(event.getAction()) {
                case MotionEvent.ACTION_DOWN:
                    last.set(event.getX(), event.getY());
                    start.set(last);
                    mode = DRAG;
                    break;
                case MotionEvent.ACTION_MOVE:
                    if (mode == DRAG) {
                        float deltaX = curr.x - last.x;
                        float deltaY = curr.y - last.y;
                        float scaleWidth = Math.round(origWidth * saveScale);
                        float scaleHeight = Math.round(origHeight * saveScale);
                        if (scaleWidth < width) {
                            deltaX = 0;
                            if (y + deltaY > 0)
                                deltaY = -y;
                            else if (y + deltaY < -bottom)
                                deltaY = -(y + bottom);
                        } else if (scaleHeight < height) {
                            deltaY = 0;
                            if (x + deltaX > 0)
                                deltaX = -x;
                            else if (x + deltaX < -right)
                                deltaX = -(x + right);
                        } else {
                            if (x + deltaX > 0)
                                deltaX = -x;
                            else if (x + deltaX < -right)
                                deltaX = -(x + right);
                            if (y + deltaY > 0)
                                deltaY = -y;
                            else if (y + deltaY < -bottom)
                                deltaY = -(y + bottom);
                        }
                        matrix.postTranslate(deltaX, deltaY);
                        last.set(curr.x, curr.y);
                    }
                    break;
                case MotionEvent.ACTION_UP:
                    mode = NONE;
                    int xDiff = (int) Math.abs(curr.x - start.x);
                    int yDiff = (int) Math.abs(curr.y - start.y);
                    if (xDiff < CLICK && yDiff < CLICK)
                        performClick();
                    break;
                case MotionEvent.ACTION_POINTER_UP:
                    mode = NONE;
                    break;
            }
            setImageMatrix(matrix);
            invalidate();
            // indicate event was handled
            return true;
        }
    });
}

Example 30 with ScaleGestureDetector

use of android.view.ScaleGestureDetector in project ZoomableImageView by laurencedawson.

the class ZoomableImageView method init.

// Setup the view
private void init(Context context) {
    mPaint = new Paint();
    mPaint.setDither(true);
    mPaint.setFilterBitmap(true);
    mPaint.setAntiAlias(true);
    // Setup the refresh runnable
    mRefresh = new Runnable() {

        @Override
        public void run() {
            postInvalidate();
        }
    };
    // Setup the gesture and scale listeners
    mScaleDetector = new ScaleGestureDetector(context, new ScaleListener());
    mGestureDetector = new GestureDetector(context, new MyGestureListener());
    // Force hardware acceleration
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB)
        setLayerType(View.LAYER_TYPE_HARDWARE, null);
}