Java Code Examples for android.view.ScaleGestureDetector#getScaleFactor()

The following examples show how to use android.view.ScaleGestureDetector#getScaleFactor() . 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: ScaleImageView.java From Tok-Android with GNU General Public License v3.0

6 votes

@Override
public boolean onScale(ScaleGestureDetector detector) {
    float scale = getScale();
    float scaleFactor = detector.getScaleFactor();
    Log.e("ScaleGestrueDetector", "scaleFactor:" + scaleFactor);
    if (getDrawable() == null) {
        return true;
    }
    if ((scale < mMaxScale && scaleFactor > 1.0f) || (scale > mInitScale
        && scaleFactor < 1.0f)) {
        if (scale * scaleFactor > mMaxScale) {
            scaleFactor = mMaxScale / scale;
        }
        if (scale * scaleFactor < mInitScale) {
            scaleFactor = mInitScale / scale;
        }

        mMatrix.postScale(scaleFactor, scaleFactor, detector.getFocusX(), detector.getFocusY());
        checkBorderAndCenterWhenScale();
        setImageMatrix(mMatrix);
    }

    return true;
}

Example 2

Source File: PinchScaleDetector.java From sensey with Apache License 2.0

6 votes

@Override
public boolean onScale(ScaleGestureDetector scaleGestureDetector) {

    float scaleFactor = scaleGestureDetector.getScaleFactor();
    if (scaleFactor > 1) {
        countOfScaleIn += 1;
        if (eventOccurred != 1 && countOfScaleIn > 2) {
            eventOccurred = 1;
            pinchScaleListener.onScale(scaleGestureDetector, true);
        }
    } else {
        countOfScaleOut += 1;
        if (eventOccurred != 2 && countOfScaleOut > 2) {
            eventOccurred = 2;
            pinchScaleListener.onScale(scaleGestureDetector, false);
        }
    }
    return true;
}

Example 3

Source File: PinchGestureLayout.java From Lassi-Android with MIT License

6 votes

@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 4

Source File: LineScrollAndScaleView.java From kAndroid with Apache License 2.0

6 votes

/******************************缩放手势*****************************************/
@Override
public boolean onScale(ScaleGestureDetector detector) {
    if (isClosePress) {
        if (!isScaleEnable()) {
            return false;
        }
        float oldScale = mScaleX;
        mScaleX *= detector.getScaleFactor();
        if (mScaleX < mScaleXMin) {
            mScaleX = mScaleXMin;

        } else if (mScaleX > mScaleXMax) {
            mScaleX = mScaleXMax;

        } else {
            onScaleChanged(mScaleX, oldScale);
        }

        Log.i("22222222222222", mScaleX + "");
        if (mScaleX >= 2.0f || mScaleX <= 0.5f) {
            isScale = true;
        }
    }
    return true;
}

Example 5

Source File: ZoomableTouchListener.java From GoogleMapView with Apache License 2.0

5 votes

@Override
public boolean onScale(ScaleGestureDetector detector) {
    if (mZoomableView == null) return false;

    mScaleFactor *= detector.getScaleFactor();

    // Don't let the object get too large.
    mScaleFactor = Math.max(MIN_SCALE_FACTOR, Math.min(mScaleFactor, MAX_SCALE_FACTOR));

    mZoomableView.setScaleX(mScaleFactor);
    mZoomableView.setScaleY(mScaleFactor);
    obscureDecorView(mScaleFactor);

    return true;
}

Example 6

Source File: SvgAndroidSampleActivity.java From android-opensource-library-56 with Apache License 2.0

5 votes

@Override
public boolean onScale(ScaleGestureDetector detector) {
    float scale = detector.getScaleFactor();
    mMatrix.postScale(scale, scale);
    mImageView.setImageMatrix(mMatrix);
    return true;
}

Example 7

Source File: GestureManager.java From XImageView with Apache License 2.0

5 votes

/*************************************缩放**************************************/

    @Override
    public boolean onScale(ScaleGestureDetector detector)
    {
        if (mBM == null) {
            return false;
        }

        float factor = detector.getScaleFactor();
        mBM.scale(detector.getFocusX(), detector.getFocusY(), factor);

        return true;
    }

Example 8

Source File: RemoteCamera.java From GoFIT_SDK_Android with Apache License 2.0

5 votes

@Override
public boolean onScale(ScaleGestureDetector detector) {
    mScaleLevel = detector.getScaleFactor() > 1
            ? mScaleLevel + detector.getScaleFactor()
            : mScaleLevel - detector.getScaleFactor();
    mScaleLevel = Math.max(1f, Math.min(mScaleLevel, mMaxLevel + 1));
    CameraClass.cameraSetZoom((int) mScaleLevel - 1);
    return true;
}

Example 9

Source File: TouchImageView.java From ChatApp with Apache License 2.0

5 votes

@Override
public boolean onScale(ScaleGestureDetector detector)
{
    float mScaleFactor = detector.getScaleFactor();
    float origScale = saveScale;

    saveScale *= mScaleFactor;

    if(saveScale > maxScale)
    {
        saveScale = maxScale;
        mScaleFactor = maxScale / origScale;
    }
    else if(saveScale < minScale)
    {
        saveScale = minScale;
        mScaleFactor = minScale / origScale;
    }

    if(origWidth * saveScale <= viewWidth || origHeight * saveScale <= viewHeight)
    {
        matrix.postScale(mScaleFactor, mScaleFactor, viewWidth / 2, viewHeight / 2);
    }
    else
    {
        matrix.postScale(mScaleFactor, mScaleFactor, detector.getFocusX(), detector.getFocusY());
    }

    fixTrans();

    return true;
}

Example 10

Source File: BaseGridScaler.java From MultiView with Apache License 2.0

5 votes

@Override
        public void onScaleEnd(ScaleGestureDetector detector) {
            Log.d("onScaleEnd: " + detector.getFocusX() + "/" + detector.getFocusY()
                    + " : " + detector.getCurrentSpan() + "/" + detector.getScaleFactor()
                    + "/" + factorOffset
                    + " : " + detector.getEventTime());

            float currFactor = detector.getScaleFactor() + factorOffset;

            if (currFactor > 1f + (1f / (float) (initSpanCount - 1)) / 2f) {
                if (initSpanCount == minSpan) {
                    //do nothing we reached our max span
                } else {
                    scale(1f, initSpanCount - 1, null);
                }
            } else if (currFactor < 1f - (1f / (float) (initSpanCount + 1)) / 2f) {
                scale(1f, initSpanCount + 1, null);
            } else {
                if (((GridLayoutManager) recyclerView.getLayoutManager()).getSpanCount() != initSpanCount) {
                    scale(1f, initSpanCount, null);
                }
            }


            if (initSpanCount != ((GridLayoutManager) recyclerView.getLayoutManager()).getSpanCount()) {
                //recyclerView.getLayoutManager().scrollToPosition(recyclerView.getChildAdapterPosition(currentView));
            }
            currScale = 1f;
            initSpanCount = 0;
//            recyclerView.getLayoutManager().requestLayout();
//            recyclerView.invalidate();

            currentView = null;
        }

Example 11

Source File: XYScrollView.java From xpra-client with GNU General Public License v3.0

5 votes

@Override
public boolean onScale(ScaleGestureDetector detector) {
	Log.i("ads", "onScale(): " + detector.getScaleFactor());
	float scaleFactor = detector.getScaleFactor();
	getChildView().setScaleX(originScaleX * scaleFactor);
	getChildView().setScaleY(originScaleY * scaleFactor);
	return false;
}

Example 12

Source File: ChartTouchHandler.java From hellocharts-android with Apache License 2.0

5 votes

@Override
public boolean onScale(ScaleGestureDetector detector) {
    if (isZoomEnabled) {
        float scale = 2.0f - detector.getScaleFactor();
        if (Float.isInfinite(scale)) {
            scale = 1;
        }
        return chartZoomer.scale(computator, detector.getFocusX(), detector.getFocusY(), scale);
    }

    return false;
}

Example 13

Source File: CameraPreviewFrameView.java From PLDroidRTCStreaming with Apache License 2.0

5 votes

@Override
public boolean onScale(ScaleGestureDetector detector) {
    // factor > 1, zoom
    // factor < 1, pinch
    mScaleFactor *= detector.getScaleFactor();

    // Don't let the object get too small or too large.
    mScaleFactor = Math.max(0.01f, Math.min(mScaleFactor, 1.0f));

    return mListener != null && mListener.onZoomValueChanged(mScaleFactor);
}

Example 14

Source File: OverlayPinchImageView.java From Augendiagnose with GNU General Public License v2.0

5 votes

@Override
public boolean onScale(@NonNull final ScaleGestureDetector detector) {
	mPupilOverlayScaleFactor *= detector.getScaleFactor();
	// Don't let the object get too small or too large.
	mPupilOverlayScaleFactor =
			Math.max(MIN_PUPIL_SCALE_FACTOR, Math.min(mPupilOverlayScaleFactor, MAX_PUPIL_SCALE_FACTOR));
	invalidate();
	return true;
}

Example 15

Source File: ImageSurfaceView.java From WorldmapLibrary with MIT License

5 votes

@Override
public boolean onScale(ScaleGestureDetector detector) {
    float scaleFactor = detector.getScaleFactor();
    if (scaleFactor!=0f && scaleFactor!=1.0f){
        scaleFactor = 1/scaleFactor;
        screenFocus.set(detector.getFocusX(),detector.getFocusY());
        scene.getViewport().zoom(
                scaleFactor,
                screenFocus);
        invalidate();
    }
    lastScaleTime = System.currentTimeMillis();
    return true;
}

Example 16

Source File: DragPinchManager.java From AndroidPdfViewerV2 with Apache License 2.0

5 votes

@Override
public boolean onScale(ScaleGestureDetector detector) {
    float dr = detector.getScaleFactor();
    float wantedZoom = pdfView.getZoom() * dr;
    if (wantedZoom < MINIMUM_ZOOM) {
        dr = MINIMUM_ZOOM / pdfView.getZoom();
    } else if (wantedZoom > MAXIMUM_ZOOM) {
        dr = MAXIMUM_ZOOM / pdfView.getZoom();
    }
    pdfView.zoomCenteredRelativeTo(dr, new PointF(detector.getFocusX(), detector.getFocusY()));
    return true;
}

Example 17

Source File: CameraPreviewFrameView.java From react-native-pili with MIT License

5 votes

@Override
public boolean onScale(ScaleGestureDetector detector) {
    // factor > 1, zoom
    // factor < 1, pinch
    mScaleFactor *= detector.getScaleFactor();

    // Don't let the object get too small or too large.
    mScaleFactor = Math.max(0.01f, Math.min(mScaleFactor, 1.0f));

    return mListener != null && mListener.onZoomValueChanged(mScaleFactor);
}

Example 18

Source File: ZoomImageView.java From Android-ImagesPickers with Apache License 2.0

5 votes

@Override
public boolean onScale(ScaleGestureDetector detector) {

    float scale = getScale();
    // 获得手势缩放的值
    float scaleFactor = detector.getScaleFactor();
    if (getDrawable() == null) {
        return true;
    }
    // 当前图片的缩放值小于最大的缩放值且检测到手势想放大，或者当前图片的缩放值大于最小的缩放值且检测到手势想缩小
    if ((scale < mMaxScale && scaleFactor > 1.0f)
            || (scale > mInitScale && scaleFactor < 1.0f)) {
        if (scale * scaleFactor < mInitScale) {
            scaleFactor = mInitScale / scale;
        }
        if (scale * scaleFactor > mMaxScale) {
            scaleFactor = mMaxScale / scale;
        }

        // detector.getFocusX(),detector.getFocusY()获取缩放时的中心坐标
        matrix.postScale(scaleFactor, scaleFactor, detector.getFocusX(),
                detector.getFocusY());

        checkBorderAndCenterWhenScale();

        setImageMatrix(matrix);
    }
    return true;
}

Example 19

Source File: ScaleDragDetector.java From PhotoDraweeView with Apache License 2.0

5 votes

@Override public boolean onScale(ScaleGestureDetector detector) {
    float scaleFactor = detector.getScaleFactor();

    if (Float.isNaN(scaleFactor) || Float.isInfinite(scaleFactor)) {
        return false;
    }

    mScaleDragGestureListener.onScale(scaleFactor, detector.getFocusX(), detector.getFocusY());
    return true;
}

Example 20

Source File: OverlayDisplayWindow.java From V.FlyoutTest with MIT License

4 votes

@Override
public boolean onScale(ScaleGestureDetector detector) {
    mLiveScale *= detector.getScaleFactor();
    relayout();
    return true;
}