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package com.github.chrisbanes.photoview;
import android.view.MotionEvent;
import android.widget.ImageView;
class Util {
static void checkZoomLevels(float minZoom, float midZoom,
float maxZoom) {
if (minZoom >= midZoom) {
throw new IllegalArgumentException(
"Minimum zoom has to be less than Medium zoom. Call setMinimumZoom() with a more appropriate value");
} else if (midZoom >= maxZoom) {
throw new IllegalArgumentException(
"Medium zoom has to be less than Maximum zoom. Call setMaximumZoom() with a more appropriate value");
}
}
static boolean hasDrawable(ImageView imageView) {
return imageView.getDrawable() != null;
}
static boolean isSupportedScaleType(final ImageView.ScaleType scaleType) {
if (scaleType == null) {
return false;
}
switch (scaleType) {
case MATRIX:
throw new IllegalStateException("Matrix scale type is not supported");
}
return true;
}
static int getPointerIndex(int action) {
return (action & MotionEvent.ACTION_POINTER_INDEX_MASK) >> MotionEvent.ACTION_POINTER_INDEX_SHIFT;
}
}
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