1 files changed, 29 insertions, 8 deletions
diff --git a/src/com/android/launcher3/pageindicators/PageIndicator.java b/src/com/android/launcher3/pageindicators/PageIndicator.java
index 77c579c93..7c5949598 100644
--- a/src/com/android/launcher3/pageindicators/PageIndicator.java
+++ b/src/com/android/launcher3/pageindicators/PageIndicator.java
@@ -1,16 +1,37 @@
 package com.android.launcher3.pageindicators;
 
+import android.content.Context;
+import android.util.AttributeSet;
 import android.view.View;
 
-import java.util.ArrayList;
+/**
+ * Base class for a page indicator.
+ */
+public abstract class PageIndicator extends View {
 
-public interface PageIndicator {
-    View getView();
-    void setScroll(int currentScroll, int totalScroll);
+    protected int mNumPages = 1;
 
-    void setActiveMarker(int activePage);
+    public PageIndicator(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+    }
 
-    void addMarker();
-    void removeMarker();
-    void setMarkersCount(int numMarkers);
+    public abstract void setScroll(int currentScroll, int totalScroll);
+
+    public abstract void setActiveMarker(int activePage);
+
+    public void addMarker() {
+        mNumPages++;
+        onPageCountChanged();
+    }
+
+    public void removeMarker() {
+        mNumPages--;
+        onPageCountChanged();
+    }
+    public void setMarkersCount(int numMarkers) {
+        mNumPages = numMarkers;
+        onPageCountChanged();
+    }
+
+    protected abstract void onPageCountChanged();
 }