How to use

getCenter

method

in

com.davemorrissey.labs.subscaleview.SubsamplingScaleImageView

private AnimationBuilder(float scale) {
  this.targetScale = scale;
  this.targetSCenter = getCenter();
  this.vFocus = null;
}

/**
 * On resize, preserve center and scale. Various behaviours are possible, override this method to use another.
 */
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
  debug("onSizeChanged %dx%d -> %dx%d", oldw, oldh, w, h);
  PointF sCenter = getCenter();
  if (readySent && sCenter != null) {
    this.anim = null;
    this.pendingScale = scale;
    this.sPendingCenter = sCenter;
  }
}

/**
 * Get the current state of the view (scale, center, orientation) for restoration after rotate. Will return null if
 * the view is not ready.
 * @return an {@link ImageViewState} instance representing the current position of the image. null if the view isn't ready.
 */
@Nullable
public final ImageViewState getState() {
  if (vTranslate != null && sWidth > 0 && sHeight > 0) {
    //noinspection ConstantConditions
    return new ImageViewState(getScale(), getCenter(), getOrientation());
  }
  return null;
}

private void sendStateChanged(float oldScale, PointF oldVTranslate, int origin) {
  if (onStateChangedListener != null && scale != oldScale) {
    onStateChangedListener.onScaleChanged(scale, origin);
  }
  if (onStateChangedListener != null && !vTranslate.equals(oldVTranslate)) {
    onStateChangedListener.onCenterChanged(getCenter(), origin);
  }
}

anim.time = System.currentTimeMillis();
anim.sCenterEndRequested = targetSCenter;
anim.sCenterStart = getCenter();
anim.sCenterEnd = targetSCenter;
anim.vFocusStart = sourceToViewCoord(targetSCenter);

canvas.drawText("Scale: " + String.format(Locale.ENGLISH, "%.2f", scale) + " (" + String.format(Locale.ENGLISH, "%.2f", minScale()) + " - " + String.format(Locale.ENGLISH, "%.2f", maxScale) + ")", px(5), px(15), debugTextPaint);
canvas.drawText("Translate: " + String.format(Locale.ENGLISH, "%.2f", vTranslate.x) + ":" + String.format(Locale.ENGLISH, "%.2f", vTranslate.y), px(5), px(30), debugTextPaint);
PointF center = getCenter();

private AnimationBuilder(float scale) {
  this.targetScale = scale;
  this.targetSCenter = getCenter();
  this.vFocus = null;
}

/**
 * On resize, preserve center and scale. Various behaviours are possible, override this method to use another.
 */
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
  debug("onSizeChanged %dx%d -> %dx%d", oldw, oldh, w, h);
  PointF sCenter = getCenter();
  if (readySent && sCenter != null) {
    this.anim = null;
    this.pendingScale = scale;
    this.sPendingCenter = sCenter;
  }
}

/**
 * Get the current state of the view (scale, center, orientation) for restoration after rotate. Will return null if
 * the view is not ready.
 */
public final ImageViewState getState() {
  if (vTranslate != null && sWidth > 0 && sHeight > 0) {
    return new ImageViewState(getScale(), getCenter(), getOrientation());
  }
  return null;
}

private void sendStateChanged(float oldScale, PointF oldVTranslate, int origin) {
  if (onStateChangedListener != null) {
    if (scale != oldScale) {
      onStateChangedListener.onScaleChanged(scale, origin);
    }
    if (!vTranslate.equals(oldVTranslate)) {
      onStateChangedListener.onCenterChanged(getCenter(), origin);
    }
  }
}

private Rect getCroppedRect() {
  SubsamplingScaleImageView imageView = findViewById(R.id.imageView);
  PointF center = imageView.getCenter();
  if (center != null) {
    int left = (int) (center.x - imageView.getWidth() / 2);
    return new Rect(left, 0, imageView.getSWidth(), imageView.getSHeight());
  }
  return new Rect(0, 0, imageView.getSWidth(), imageView.getSHeight());
}

canvas.drawText("Scale: " + String.format(Locale.ENGLISH, "%.2f", scale), 5, 15, debugPaint);
canvas.drawText("Translate: " + String.format(Locale.ENGLISH, "%.2f", vTranslate.x) + ":" + String.format(Locale.ENGLISH, "%.2f", vTranslate.y), 5, 35, debugPaint);
PointF center = getCenter();
canvas.drawText("Source center: " + String.format(Locale.ENGLISH, "%.2f", center.x) + ":" + String.format(Locale.ENGLISH, "%.2f", center.y), 5, 55, debugPaint);
debugPaint.setStrokeWidth(2f);

anim.time = System.currentTimeMillis();
anim.sCenterEndRequested = targetSCenter;
anim.sCenterStart = getCenter();
anim.sCenterEnd = targetSCenter;
anim.vFocusStart = sourceToViewCoord(targetSCenter);