/**
* Clean-up the resources attached to this object. This needs to be called when the ImageView is
* no longer used. A good example is from {@link android.view.View#onDetachedFromWindow()} or from
* {@link android.app.Activity#onDestroy()}. This is automatically called if you are using {@link
* uk.co.senab.photoview.PhotoView}.
*/
@SuppressWarnings("deprecation")
public void cleanup() {
if (null != mImageView) {
// Remove this as a global layout listener
ViewTreeObserver observer = mImageView.getViewTreeObserver();
if (null != observer && observer.isAlive()) {
observer.removeGlobalOnLayoutListener(this);
}
// Remove the ImageView's reference to this
mImageView.setOnTouchListener(null);
// make sure a pending fling runnable won't be run
cancelFling();
}
if (null != mGestureDetector) {
mGestureDetector.setOnDoubleTapListener(null);
}
// Clear listeners too
mMatrixChangeListener = null;
mPhotoTapListener = null;
mViewTapListener = null;
// Finally, clear ImageView
mImageView = null;
}
@Override
public final boolean onTouch(View v, MotionEvent ev) {
boolean handled = false;
if (mZoomEnabled && hasDrawable((ImageView) v)) {
ViewParent parent = v.getParent();
switch (ev.getAction()) {
case ACTION_DOWN:
// First, disable the Parent from intercepting the touch
// event
if (null != parent) parent.requestDisallowInterceptTouchEvent(true);
else Log.i(LOG_TAG, "onTouch getParent() returned null");
// If we're flinging, and the user presses down, cancel
// fling
cancelFling();
break;
case ACTION_CANCEL:
case ACTION_UP:
// If the user has zoomed less than min scale, zoom back
// to min scale
if (getScale() < mMinScale) {
RectF rect = getDisplayRect();
if (null != rect) {
v.post(
new AnimatedZoomRunnable(getScale(), mMinScale, rect.centerX(), rect.centerY()));
handled = true;
}
}
break;
}
// Check to see if the user double tapped
if (null != mGestureDetector && mGestureDetector.onTouchEvent(ev)) {
handled = true;
}
if (!handled && null != parent) {
parent.requestDisallowInterceptTouchEvent(false);
}
// Finally, try the Scale/Drag detector
if (null != mScaleDragDetector && mScaleDragDetector.onTouchEvent(ev)) {
handled = true;
}
}
return handled;
}
@SuppressLint("ClickableViewAccessibility")
@Override
public boolean onTouch(View v, MotionEvent ev) {
boolean handled = false;
if (mZoomEnabled && hasDrawable((ImageView) v)) {
getViewParentsFromImageView(v);
switch (ev.getAction()) {
case ACTION_DOWN:
// First, disable the Parent from intercepting the touch
// event
setParentDisallowInterceptTouchEvent(true);
// If we're flinging, and the user presses down, cancel
// fling
cancelFling();
break;
case ACTION_CANCEL:
case ACTION_UP:
// If the user has zoomed less than min scale, zoom back
// to min scale
if (getScale() < mMinScale) {
RectF rect = getDisplayRect();
if (null != rect) {
v.post(
new AnimatedZoomRunnable(getScale(), mMinScale, rect.centerX(), rect.centerY()));
handled = true;
}
}
break;
}
// Try the Scale/Drag detector
if (null != mScaleDragDetector && mScaleDragDetector.onTouchEvent(ev)) {
handled = true;
}
// Check to see if the user double tapped
if (null != mGestureDetector && mGestureDetector.onTouchEvent(ev)) {
handled = true;
}
}
return handled;
}