Merge pull request #48 from arizz96/add_scroll_multiplier_accessors

Add scroll multiplier accessors

Author: kanytu

library/src/main/java/com/poliveira/parallaxrecyclerview/ParallaxRecyclerAdapter.java

@@ -14,7 +14,7 @@
 import java.util.List;
 
 public abstract class ParallaxRecyclerAdapter<T> extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
-    private static final float SCROLL_MULTIPLIER = 0.5f;
+    private float mScrollMultiplier = 0.5f;
 
     public static class VIEW_TYPES {
         public static final int NORMAL = 1;
@@ -62,7 +62,7 @@ public interface OnParallaxScroll {
      * @param of offset in px
      */
     public void translateHeader(float of) {
-        float ofCalculated = of * SCROLL_MULTIPLIER;
+        float ofCalculated = of * mScrollMultiplier;
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB && of < mHeader.getHeight()) {
             mHeader.setTranslationY(ofCalculated);
         } else if (of < mHeader.getHeight()) {
@@ -76,7 +76,7 @@ public void translateHeader(float of) {
             final RecyclerView.ViewHolder holder = mRecyclerView.findViewHolderForAdapterPosition(0);
             float left;
             if (holder != null) {
-                left = Math.min(1, ((ofCalculated) / (mHeader.getHeight() * SCROLL_MULTIPLIER)));
+                left = Math.min(1, ((ofCalculated) / (mHeader.getHeight() * mScrollMultiplier)));
             }else{
                 left = 1;
             }
@@ -238,4 +238,20 @@ public void setClipY(int offset) {
             invalidate();
         }
     }
+    /**
+     * Set parallax scroll multiplier.
+     *
+     * @param mul The multiplier
+     */
+    public void setScrollMultiplier(float mul) {
+        this.mScrollMultiplier = mul;
+    }
+
+    /**
+     * Get the current parallax scroll multiplier.
+     *
+     */
+    public float getScrollMultiplier() {
+        return this.mScrollMultiplier;
+    }
 }