Java Code Examples for android.view.ScaleGestureDetector#SimpleOnScaleGestureListener

The following examples show how to use android.view.ScaleGestureDetector#SimpleOnScaleGestureListener . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source File: PinchGestureLayout.java    From Lassi-Android with MIT License 6 votes vote down vote up 
@Override
protected void onInitialize(@NonNull Context context) {
    super.onInitialize(context);
    mPoints = new PointF[]{new PointF(0, 0), new PointF(0, 0)};
    mDetector = new ScaleGestureDetector(context, new ScaleGestureDetector.SimpleOnScaleGestureListener() {
        @Override
        public boolean onScale(ScaleGestureDetector detector) {
            mNotify = true;
            mFactor = ((detector.getScaleFactor() - 1) * ADD_SENSITIVITY);
            return true;
        }
    });

    if (Build.VERSION.SDK_INT >= 19) {
        mDetector.setQuickScaleEnabled(false);
    }

    // We listen only to the pinch type.
    setGestureType(Gesture.PINCH);
}
Example 2
Source File: NeopixelActivity.java    From Bluefruit_LE_Connect_Android with MIT License 6 votes vote down vote up 
private void setupZoomGesture() {
    mGestureDetector = new GestureDetector(this, new GestureListener());

    mScaleDetector = new ScaleGestureDetector(this, new ScaleGestureDetector.SimpleOnScaleGestureListener() {
        @Override
        public boolean onScale(ScaleGestureDetector detector) {
            float scale = 1 - detector.getScaleFactor();

            mBoardScale += scale;

            if (mBoardScale < kMinBoardScale) mBoardScale = kMinBoardScale;
            if (mBoardScale > kMaxBoardScale) mBoardScale = kMaxBoardScale;

            mBoardContentView.setScaleX(1f / mBoardScale);
            mBoardContentView.setScaleY(1f / mBoardScale);
            return true;
        }
    });
}
Example 3
Source File: NeopixelFragment.java    From Bluefruit_LE_Connect_Android_V2 with MIT License 5 votes vote down vote up 
private void setupGestures() {
    mGestureDetector = new GestureDetector(getContext(), new GestureListener());

    mScaleDetector = new ScaleGestureDetector(getContext(), new ScaleGestureDetector.SimpleOnScaleGestureListener() {
        @Override
        public boolean onScale(ScaleGestureDetector detector) {
            float scale = 1 - detector.getScaleFactor();

            mBoardScale += scale;

            if (mBoardScale < kMinBoardScale) mBoardScale = kMinBoardScale;
            if (mBoardScale > kMaxBoardScale) mBoardScale = kMaxBoardScale;
            Log.d(TAG, "Board scale: " + mBoardScale);

            mBoardContentView.setScaleX(1f / mBoardScale);
            mBoardContentView.setScaleY(1f / mBoardScale);
            return true;
        }
    });

    mCustomPanningView.setOnTouchListener((view, motionEvent) -> {      // Make the GestureDetectors work: https://stackoverflow.com/questions/11421368/android-fragment-oncreateview-with-gestures/11421565#11421565
        final boolean scaleResult = mGestureDetector.onTouchEvent(motionEvent);
        /*final boolean gestureResult = */
        mScaleDetector.onTouchEvent(motionEvent);
        //Log.d(TAG, "scaleResult: " + scaleResult + " gestureResult: " + gestureResult);
        return scaleResult;// || gestureResult;
    });
}
Example 4
Source File: ImageViewerView.java    From photo-viewer with Apache License 2.0 5 votes vote down vote up 
private void init() {
    inflate(getContext(), R.layout.image_viewer, this);

    backgroundView = findViewById(R.id.backgroundView);
    pager = (MultiTouchViewPager) findViewById(R.id.pager);

    dismissContainer = (ViewGroup) findViewById(R.id.container);
    swipeDismissListener = new SwipeToDismissListener(findViewById(R.id.dismissView), this, this);
    dismissContainer.setOnTouchListener(swipeDismissListener);

    directionDetector = new SwipeDirectionDetector(getContext()) {
        @Override
        public void onDirectionDetected(Direction direction) {
            ImageViewerView.this.direction = direction;
        }
    };

    scaleDetector = new ScaleGestureDetector(getContext(),
            new ScaleGestureDetector.SimpleOnScaleGestureListener());

    gestureDetector = new GestureDetectorCompat(getContext(), new GestureDetector.SimpleOnGestureListener() {
        @Override
        public boolean onSingleTapConfirmed(MotionEvent e) {
            if (pager.isScrolled()) {
                onClick(e, isOverlayWasClicked);
            }
            return false;
        }
    });
}
Example 5
Source File: PinchToZoomDraweeView.java    From droidddle with Apache License 2.0 5 votes vote down vote up 
public PinchToZoomDraweeView(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
    mScaleListener = new ScaleGestureDetector.SimpleOnScaleGestureListener() {
        @Override
        public boolean onScale(ScaleGestureDetector detector) {
            float scaleFactor = detector.getScaleFactor();
            float newScale = mCurrentScale * scaleFactor;
            // Prevent from zooming out more than original
            if (newScale > 1.0f) {
                // We initialize this lazily so that we don't have to register (and force the user
                // to unregister) a global layout listener on the view.
                if (mMidX == 0.0f) {
                    mMidX = getWidth() / 2.0f;
                }
                if (mMidY == 0.0f) {
                    mMidY = getHeight() / 2.0f;
                }
                mCurrentScale = newScale;
                mCurrentMatrix.postScale(scaleFactor, scaleFactor, mMidX, mMidY);
                invalidate();
            } else {
                scaleFactor = 1.0f / mCurrentScale;
                reset();
            }

            if (mListener != null && scaleFactor != 1.0f) {
                mListener.onZoomChange(mCurrentScale);
            }

            return true;
        }
    };
    mScaleDetector = new ScaleGestureDetector(getContext(), mScaleListener);
    mCurrentMatrix = new Matrix();
}
Example 6
Source File: SimplePhotoView.java    From droidddle with Apache License 2.0 4 votes vote down vote up 
public SimplePhotoView(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
    //initialize ScaleGestureDetector. Capture the
    mScaleListener = new ScaleGestureDetector.SimpleOnScaleGestureListener() {
        @Override
        public boolean onScale(ScaleGestureDetector detector) {
            float scaleFactor = detector.getScaleFactor();
            float newScale = mCurrentScale * scaleFactor;
            // LogUtils.d("scaleFactor=" + scaleFactor + ",newScale=" + newScale);
            // Prevent from zooming out more than original
            if (newScale > 1.0f && newScale < SCALE_MAX) {
                if (mMidX == 0.0f) {
                    mMidX = getWidth() / 2;//from center to zoom
                }
                if (mMidY == 0.0f) {
                    mMidY = getHeight() / 2;//from center to zoom
                }
                mCurrentScale = newScale;
                SimplePhotoView.this.postDelayed(new AutoRunableZoom(newScale), 16);
            } else if (newScale > SCALE_MAX) {
                newScale = SCALE_MAX;
                mCurrentScale = newScale;
            }

            return true;
        }
    };
    mScaleDetector = new ScaleGestureDetector(getContext(), mScaleListener);
    mCurrentMatrix = new Matrix();
    //initialize GestureDetector, Capture double tap event
    mGestureDetector = new GestureDetector(context,
            new GestureDetector.SimpleOnGestureListener() {
                @Override
                public boolean onDoubleTap(MotionEvent e) {
                    float newscale = 0.0f;
                    if (mCurrentScale == 1.0f) {
                        newscale = SCALE_MID;
                    } else if (mCurrentScale >= SCALE_MID && mCurrentScale < SCALE_MAX) {
                        newscale = SCALE_MAX;
                    } else if (mCurrentScale >= SCALE_MAX) {
                        newscale = 1.0f;
                    }
                    mCurrentScale = newscale;
                    SimplePhotoView.this.postDelayed(new AutoRunableZoom(newscale), 16);
                    isAutoScale = true;
                    return true;
                }
            });
    this.setOnTouchListener(this);
}