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allow only pinch zooming, not double tap
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74dd400731
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1 changed files with 5 additions and 0 deletions
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@ -12,6 +12,7 @@ class MyScalableRecyclerView : RecyclerView {
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companion object {
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var mListener: ZoomListener? = null
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var mCurrScaleFactor = 1.0f
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var mLastUp = 0L // allow only pinch zoom, not double tap
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}
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constructor(context: Context) : super(context) {
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@ -28,6 +29,7 @@ class MyScalableRecyclerView : RecyclerView {
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super.dispatchTouchEvent(ev)
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if (ev.action == MotionEvent.ACTION_UP) {
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mCurrScaleFactor = 1.0f
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mLastUp = System.currentTimeMillis()
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}
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return mScaleDetector.onTouchEvent(ev)
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@ -38,6 +40,9 @@ class MyScalableRecyclerView : RecyclerView {
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val ZOOM_OUT_THRESHOLD = 0.3f
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override fun onScale(detector: ScaleGestureDetector): Boolean {
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if (System.currentTimeMillis() - mLastUp < 1000)
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return false
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val diff = mCurrScaleFactor - detector.scaleFactor
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if (diff < ZOOM_IN_THRESHOLD && mCurrScaleFactor == 1.0f) {
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mListener?.zoomIn()
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