From 93d07548fa7071bca5cf43b5b186e9252d8fca27 Mon Sep 17 00:00:00 2001
From: Anton Knyazev <anton.knyazev@omega-r.com>
Date: Tue, 24 Oct 2017 19:01:42 +0300
Subject: [PATCH] Added alpha for dividers

---
 app/src/main/res/layout/fragment_test.xml          |  1 +
 .../omegarecyclerview/DividerItemDecoration.java   | 14 ++++++++------
 .../libs/omegarecyclerview/OmegaRecyclerView.java  |  3 ++-
 .../src/main/res/values/attrs.xml                  |  1 +
 4 files changed, 12 insertions(+), 7 deletions(-)

diff --git a/app/src/main/res/layout/fragment_test.xml b/app/src/main/res/layout/fragment_test.xml
index 2fcf147..24be2ba 100644
--- a/app/src/main/res/layout/fragment_test.xml
+++ b/app/src/main/res/layout/fragment_test.xml
@@ -12,5 +12,6 @@
         android:divider="@drawable/divider"
         android:dividerHeight="1dp"
         app:itemSpace="32dp"
+        app:alphaDivider="0.5"
         app:showDivider="middle"/>
 </FrameLayout>
diff --git a/omegarecyclerviewlibs/src/main/java/com/omega_r/libs/omegarecyclerview/DividerItemDecoration.java b/omegarecyclerviewlibs/src/main/java/com/omega_r/libs/omegarecyclerview/DividerItemDecoration.java
index 4798873..6d636a0 100644
--- a/omegarecyclerviewlibs/src/main/java/com/omega_r/libs/omegarecyclerview/DividerItemDecoration.java
+++ b/omegarecyclerviewlibs/src/main/java/com/omega_r/libs/omegarecyclerview/DividerItemDecoration.java
@@ -33,18 +33,20 @@ public interface ShowDivider {
     private int mDividerSize;
     private int mShowDivider;
     private final int mOffset;
+    private final float mDividerAlpha;
     private int mOrientation;
 
-    public DividerItemDecoration(Drawable divider, int dividerSize, int showDivider, int offset) {
-        this(divider, Orientation.UNKNOWN, dividerSize, showDivider, offset);
+    public DividerItemDecoration(Drawable divider, int dividerSize, int showDivider, int offset, float dividerAlpha) {
+        this(divider, Orientation.UNKNOWN, dividerSize, showDivider, offset, dividerAlpha);
     }
 
-    public DividerItemDecoration(Drawable divider, int orientation, int dividerSize, int showDivider, int offset) {
+    public DividerItemDecoration(Drawable divider, int orientation, int dividerSize, int showDivider, int offset, float dividerAlpha) {
         mOrientation = orientation;
         mDivider = divider;
         mDividerSize = dividerSize;
         mShowDivider = showDivider;
         mOffset = offset;
+        mDividerAlpha = dividerAlpha;
         updateSize();
     }
 
@@ -129,7 +131,7 @@ public void onDrawOver(Canvas c, RecyclerView parent, RecyclerView.State state)
                             left = child.getRight() + params.rightMargin;
                             right = left + size;
                         }
-                        divider.setAlpha((int) (child.getAlpha() * 255f));
+                        divider.setAlpha((int) (child.getAlpha() * 255f * mDividerAlpha));
                         divider.setBounds(left, top, right, bottom);
                         divider.draw(c);
                         startIndex = i;
@@ -152,7 +154,7 @@ public void onDrawOver(Canvas c, RecyclerView parent, RecyclerView.State state)
                             left = child.getLeft() - params.leftMargin - mOffset;
                             right = left + size;
                         }
-                        divider.setAlpha((int) (child.getAlpha() * 255f));
+                        divider.setAlpha((int) (child.getAlpha() * 255f * mDividerAlpha));
                         divider.setBounds(left, top, right, bottom);
                         divider.draw(c);
                     }
@@ -176,7 +178,7 @@ public void onDrawOver(Canvas c, RecyclerView parent, RecyclerView.State state)
                             right = left + size;
                         }
 
-                        divider.setAlpha((int) (child.getAlpha() * 255f));
+                        divider.setAlpha((int) (child.getAlpha() * 255f * mDividerAlpha));
                         divider.setBounds(left, top, right, bottom);
                         divider.draw(c);
                         break;
diff --git a/omegarecyclerviewlibs/src/main/java/com/omega_r/libs/omegarecyclerview/OmegaRecyclerView.java b/omegarecyclerviewlibs/src/main/java/com/omega_r/libs/omegarecyclerview/OmegaRecyclerView.java
index 8b767c7..a3702c5 100644
--- a/omegarecyclerviewlibs/src/main/java/com/omega_r/libs/omegarecyclerview/OmegaRecyclerView.java
+++ b/omegarecyclerviewlibs/src/main/java/com/omega_r/libs/omegarecyclerview/OmegaRecyclerView.java
@@ -116,7 +116,8 @@ public void initDivider(TypedArray a) {
                 }
 
                 float dividerHeight = a.getDimension(R.styleable.OmegaRecyclerView_android_dividerHeight, -1);
-                addItemDecoration(new DividerItemDecoration(dividerDrawable, (int) dividerHeight, showDivider, mItemSpace / 2));
+                float alpha = a.getFloat(R.styleable.OmegaRecyclerView_alphaDivider, 1);
+                addItemDecoration(new DividerItemDecoration(dividerDrawable, (int) dividerHeight, showDivider, mItemSpace / 2, alpha));
             }
         }
     }
diff --git a/omegarecyclerviewlibs/src/main/res/values/attrs.xml b/omegarecyclerviewlibs/src/main/res/values/attrs.xml
index e8768d2..561fe80 100644
--- a/omegarecyclerviewlibs/src/main/res/values/attrs.xml
+++ b/omegarecyclerviewlibs/src/main/res/values/attrs.xml
@@ -11,6 +11,7 @@
             <flag name="middle" value="2" />
             <flag name="end" value="4" />
         </attr>
+        <attr name="alphaDivider" format="float"/>
         <attr name="emptyView" format="reference" />
     </declare-styleable>
 </resources>
\ No newline at end of file