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Allow parent to intercept touch events in case vertical scroll edge flags are set #742

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Original file line number Diff line number Diff line change
@@ -0,0 +1,6 @@
package com.github.chrisbanes.photoview;

public @interface ParentScrollDirection {
int HORIZONTAL = 0;
int VERTICAL = 1;
}
Original file line number Diff line number Diff line change
Expand Up @@ -253,4 +253,8 @@ public void setOnScaleChangeListener(OnScaleChangedListener onScaleChangedListen
public void setOnSingleFlingListener(OnSingleFlingListener onSingleFlingListener) {
attacher.setOnSingleFlingListener(onSingleFlingListener);
}

public void setParentScrollDirection(@ParentScrollDirection int scrollDirection) {
attacher.setParentScrollDirection(scrollDirection);
}
}
Original file line number Diff line number Diff line change
Expand Up @@ -90,6 +90,7 @@ public class PhotoViewAttacher implements View.OnTouchListener,
private FlingRunnable mCurrentFlingRunnable;
private int mHorizontalScrollEdge = HORIZONTAL_EDGE_BOTH;
private int mVerticalScrollEdge = VERTICAL_EDGE_BOTH;
private int mParentScrollDirection = ParentScrollDirection.HORIZONTAL;
private float mBaseRotation;

private boolean mZoomEnabled = true;
Expand Down Expand Up @@ -118,9 +119,10 @@ public void onDrag(float dx, float dy) {
*/
ViewParent parent = mImageView.getParent();
if (mAllowParentInterceptOnEdge && !mScaleDragDetector.isScaling() && !mBlockParentIntercept) {
if (mHorizontalScrollEdge == HORIZONTAL_EDGE_BOTH
if ((mHorizontalScrollEdge == HORIZONTAL_EDGE_BOTH && mParentScrollDirection == ParentScrollDirection.HORIZONTAL)
|| (mHorizontalScrollEdge == HORIZONTAL_EDGE_LEFT && dx >= 1f)
|| (mHorizontalScrollEdge == HORIZONTAL_EDGE_RIGHT && dx <= -1f)
|| (mVerticalScrollEdge == VERTICAL_EDGE_BOTH && mParentScrollDirection == ParentScrollDirection.VERTICAL)
|| (mVerticalScrollEdge == VERTICAL_EDGE_TOP && dy >= 1f)
|| (mVerticalScrollEdge == VERTICAL_EDGE_BOTTOM && dy <= -1f)) {
if (parent != null) {
Expand Down Expand Up @@ -260,6 +262,10 @@ public void setOnSingleFlingListener(OnSingleFlingListener onSingleFlingListener
this.mSingleFlingListener = onSingleFlingListener;
}

public void setParentScrollDirection(@ParentScrollDirection int scrollDirection) {
this.mParentScrollDirection = scrollDirection;
}

@Deprecated
public boolean isZoomEnabled() {
return mZoomEnabled;
Expand Down