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

Example 31 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 32 with ScaleGestureDetector

use of android.view.ScaleGestureDetector in project Android-Week-View by alamkanak.

the class WeekView method init.

private void init() {
    // Scrolling initialization.
    mGestureDetector = new GestureDetectorCompat(mContext, mGestureListener);
    mScroller = new OverScroller(mContext, new FastOutLinearInInterpolator());
    mMinimumFlingVelocity = ViewConfiguration.get(mContext).getScaledMinimumFlingVelocity();
    mScaledTouchSlop = ViewConfiguration.get(mContext).getScaledTouchSlop();
    // Measure settings for time column.
    mTimeTextPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
    mTimeTextPaint.setTextAlign(Paint.Align.RIGHT);
    mTimeTextPaint.setTextSize(mTextSize);
    mTimeTextPaint.setColor(mHeaderColumnTextColor);
    Rect rect = new Rect();
    mTimeTextPaint.getTextBounds("00 PM", 0, "00 PM".length(), rect);
    mTimeTextHeight = rect.height();
    mHeaderMarginBottom = mTimeTextHeight / 2;
    initTextTimeWidth();
    // Measure settings for header row.
    mHeaderTextPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
    mHeaderTextPaint.setColor(mHeaderColumnTextColor);
    mHeaderTextPaint.setTextAlign(Paint.Align.CENTER);
    mHeaderTextPaint.setTextSize(mTextSize);
    mHeaderTextPaint.getTextBounds("00 PM", 0, "00 PM".length(), rect);
    mHeaderTextHeight = rect.height();
    mHeaderTextPaint.setTypeface(Typeface.DEFAULT_BOLD);
    // Prepare header background paint.
    mHeaderBackgroundPaint = new Paint();
    mHeaderBackgroundPaint.setColor(mHeaderRowBackgroundColor);
    // Prepare day background color paint.
    mDayBackgroundPaint = new Paint();
    mDayBackgroundPaint.setColor(mDayBackgroundColor);
    mFutureBackgroundPaint = new Paint();
    mFutureBackgroundPaint.setColor(mFutureBackgroundColor);
    mPastBackgroundPaint = new Paint();
    mPastBackgroundPaint.setColor(mPastBackgroundColor);
    mFutureWeekendBackgroundPaint = new Paint();
    mFutureWeekendBackgroundPaint.setColor(mFutureWeekendBackgroundColor);
    mPastWeekendBackgroundPaint = new Paint();
    mPastWeekendBackgroundPaint.setColor(mPastWeekendBackgroundColor);
    // Prepare hour separator color paint.
    mHourSeparatorPaint = new Paint();
    mHourSeparatorPaint.setStyle(Paint.Style.STROKE);
    mHourSeparatorPaint.setStrokeWidth(mHourSeparatorHeight);
    mHourSeparatorPaint.setColor(mHourSeparatorColor);
    // Prepare the "now" line color paint
    mNowLinePaint = new Paint();
    mNowLinePaint.setStrokeWidth(mNowLineThickness);
    mNowLinePaint.setColor(mNowLineColor);
    // Prepare today background color paint.
    mTodayBackgroundPaint = new Paint();
    mTodayBackgroundPaint.setColor(mTodayBackgroundColor);
    // Prepare today header text color paint.
    mTodayHeaderTextPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
    mTodayHeaderTextPaint.setTextAlign(Paint.Align.CENTER);
    mTodayHeaderTextPaint.setTextSize(mTextSize);
    mTodayHeaderTextPaint.setTypeface(Typeface.DEFAULT_BOLD);
    mTodayHeaderTextPaint.setColor(mTodayHeaderTextColor);
    // Prepare event background color.
    mEventBackgroundPaint = new Paint();
    mEventBackgroundPaint.setColor(Color.rgb(174, 208, 238));
    // Prepare header column background color.
    mHeaderColumnBackgroundPaint = new Paint();
    mHeaderColumnBackgroundPaint.setColor(mHeaderColumnBackgroundColor);
    // Prepare event text size and color.
    mEventTextPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG | Paint.LINEAR_TEXT_FLAG);
    mEventTextPaint.setStyle(Paint.Style.FILL);
    mEventTextPaint.setColor(mEventTextColor);
    mEventTextPaint.setTextSize(mEventTextSize);
    // Set default event color.
    mDefaultEventColor = Color.parseColor("#9fc6e7");
    mScaleDetector = new ScaleGestureDetector(mContext, new ScaleGestureDetector.OnScaleGestureListener() {

        @Override
        public void onScaleEnd(ScaleGestureDetector detector) {
            mIsZooming = false;
        }

        @Override
        public boolean onScaleBegin(ScaleGestureDetector detector) {
            mIsZooming = true;
            goToNearestOrigin();
            return true;
        }

        @Override
        public boolean onScale(ScaleGestureDetector detector) {
            mNewHourHeight = Math.round(mHourHeight * detector.getScaleFactor());
            invalidate();
            return true;
        }
    });
}

Example 33 with ScaleGestureDetector

use of android.view.ScaleGestureDetector in project android_frameworks_base by ParanoidAndroid.

the class WebViewClassic method onHandleUiTouchEvent.

private void onHandleUiTouchEvent(MotionEvent ev) {
    final ScaleGestureDetector detector = mZoomManager.getScaleGestureDetector();
    int action = ev.getActionMasked();
    final boolean pointerUp = action == MotionEvent.ACTION_POINTER_UP;
    final boolean configChanged = action == MotionEvent.ACTION_POINTER_UP || action == MotionEvent.ACTION_POINTER_DOWN;
    final int skipIndex = pointerUp ? ev.getActionIndex() : -1;
    // Determine focal point
    float sumX = 0, sumY = 0;
    final int count = ev.getPointerCount();
    for (int i = 0; i < count; i++) {
        if (skipIndex == i)
            continue;
        sumX += ev.getX(i);
        sumY += ev.getY(i);
    }
    final int div = pointerUp ? count - 1 : count;
    float x = sumX / div;
    float y = sumY / div;
    if (configChanged) {
        mLastTouchX = Math.round(x);
        mLastTouchY = Math.round(y);
        mLastTouchTime = ev.getEventTime();
        mWebView.cancelLongPress();
        mPrivateHandler.removeMessages(SWITCH_TO_LONGPRESS);
    }
    if (detector != null) {
        detector.onTouchEvent(ev);
        if (detector.isInProgress()) {
            mLastTouchTime = ev.getEventTime();
            if (!mZoomManager.supportsPanDuringZoom()) {
                return;
            }
            mTouchMode = TOUCH_DRAG_MODE;
            if (mVelocityTracker == null) {
                mVelocityTracker = VelocityTracker.obtain();
            }
        }
    }
    if (action == MotionEvent.ACTION_POINTER_DOWN) {
        cancelTouch();
        action = MotionEvent.ACTION_DOWN;
    } else if (action == MotionEvent.ACTION_MOVE) {
        // negative x or y indicate it is on the edge, skip it.
        if (x < 0 || y < 0) {
            return;
        }
    }
    handleTouchEventCommon(ev, action, Math.round(x), Math.round(y));
}

Example 34 with ScaleGestureDetector

use of android.view.ScaleGestureDetector in project android_frameworks_base by ParanoidAndroid.

the class ZoomManager method updateMultiTouchSupport.

public void updateMultiTouchSupport(Context context) {
    // check the preconditions
    assert mWebView.getSettings() != null;
    final WebSettings settings = mWebView.getSettings();
    final PackageManager pm = context.getPackageManager();
    mSupportMultiTouch = (pm.hasSystemFeature(PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH) || pm.hasSystemFeature(PackageManager.FEATURE_FAKETOUCH_MULTITOUCH_DISTINCT)) && settings.supportZoom() && settings.getBuiltInZoomControls();
    mAllowPanAndScale = pm.hasSystemFeature(PackageManager.FEATURE_TOUCHSCREEN_MULTITOUCH_DISTINCT) || pm.hasSystemFeature(PackageManager.FEATURE_FAKETOUCH_MULTITOUCH_DISTINCT);
    if (mSupportMultiTouch && (mScaleDetector == null)) {
        mScaleDetector = new ScaleGestureDetector(context, new ScaleDetectorListener());
    } else if (!mSupportMultiTouch && (mScaleDetector != null)) {
        mScaleDetector = null;
    }
}

Example 35 with ScaleGestureDetector

use of android.view.ScaleGestureDetector in project platform_frameworks_base by android.

the class ExpandHelper method cancel.

/**
     * Use this to abort any pending expansions in progress.
     */
public void cancel() {
    finishExpanding(true, 0f);
    clearView();
    // reset the gesture detector
    mSGD = new ScaleGestureDetector(mContext, mScaleGestureListener);
}