From de8d0834fc2bc31f011fb3316757883e1b731440 Mon Sep 17 00:00:00 2001
From: Adam Powell <adamp@google.com>
Date: Tue, 9 Mar 2010 17:11:30 -0800
Subject: [PATCH] Added ViewConfiguration.getScaledPagingTouchSlop()

Change-Id: I9ab5560c4b76d2b87e53d38b10ba8f5ec4868d85
---
 api/current.xml                               | 11 +++++++++++
 core/java/android/view/ViewConfiguration.java | 17 +++++++++++++++++
 2 files changed, 28 insertions(+)

diff --git a/api/current.xml b/api/current.xml
index ed3f69659123d..8d15665afa94a 100644
--- a/api/current.xml
+++ b/api/current.xml
@@ -179390,6 +179390,17 @@
  visibility="public"
 >
 </method>
+<method name="getScaledPagingTouchSlop"
+ return="int"
+ abstract="false"
+ native="false"
+ synchronized="false"
+ static="false"
+ final="false"
+ deprecated="not deprecated"
+ visibility="public"
+>
+</method>
 <method name="getScaledScrollBarSize"
  return="int"
  abstract="false"
diff --git a/core/java/android/view/ViewConfiguration.java b/core/java/android/view/ViewConfiguration.java
index 2344c42e24648..2b78d2d31cb75 100644
--- a/core/java/android/view/ViewConfiguration.java
+++ b/core/java/android/view/ViewConfiguration.java
@@ -101,6 +101,12 @@ public class ViewConfiguration {
      */
     private static final int TOUCH_SLOP = 16;
     
+    /**
+     * Distance a touch can wander before we think the user is attempting a paged scroll
+     * (in dips)
+     */
+    private static final int PAGING_TOUCH_SLOP = TOUCH_SLOP * 3;
+    
     /**
      * Distance between the first touch and second touch to still be considered a double tap
      */
@@ -140,6 +146,7 @@ public class ViewConfiguration {
     private final int mMaximumFlingVelocity;
     private final int mScrollbarSize;
     private final int mTouchSlop;
+    private final int mPagingTouchSlop;
     private final int mDoubleTapSlop;
     private final int mWindowTouchSlop;
     private final int mMaximumDrawingCacheSize;
@@ -158,6 +165,7 @@ public class ViewConfiguration {
         mMaximumFlingVelocity = MAXIMUM_FLING_VELOCITY;
         mScrollbarSize = SCROLL_BAR_SIZE;
         mTouchSlop = TOUCH_SLOP;
+        mPagingTouchSlop = PAGING_TOUCH_SLOP;
         mDoubleTapSlop = DOUBLE_TAP_SLOP;
         mWindowTouchSlop = WINDOW_TOUCH_SLOP;
         //noinspection deprecation
@@ -184,6 +192,7 @@ public class ViewConfiguration {
         mMaximumFlingVelocity = (int) (density * MAXIMUM_FLING_VELOCITY + 0.5f);
         mScrollbarSize = (int) (density * SCROLL_BAR_SIZE + 0.5f);
         mTouchSlop = (int) (density * TOUCH_SLOP + 0.5f);
+        mPagingTouchSlop = (int) (density * PAGING_TOUCH_SLOP + 0.5f);
         mDoubleTapSlop = (int) (density * DOUBLE_TAP_SLOP + 0.5f);
         mWindowTouchSlop = (int) (density * WINDOW_TOUCH_SLOP + 0.5f);
 
@@ -339,6 +348,14 @@ public class ViewConfiguration {
     public int getScaledTouchSlop() {
         return mTouchSlop;
     }
+    
+    /**
+     * @return Distance a touch can wander before we think the user is scrolling a full page
+     *         in dips
+     */
+    public int getScaledPagingTouchSlop() {
+        return mPagingTouchSlop;
+    }
 
     /**
      * @return Distance between the first touch and second touch to still be