From 770f7c590753219d38f957278488b5b3f05e70ec Mon Sep 17 00:00:00 2001
From: Mady Mellor <madym@google.com>
Date: Tue, 2 Jun 2015 15:02:14 -0700
Subject: [PATCH] Stylus support: handling drag n drop for widgets

This alters the widget host view code to consider stylus button presses
allowing the user to pick up widgets with a stylus button press, and drop
them by releasing the button.

Bug: 20430722
Change-Id: I359f72bd80016f4b313aab1325cc92d7c6fd2a8c
---
 .../launcher3/LauncherAppWidgetHostView.java       | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/src/com/android/launcher3/LauncherAppWidgetHostView.java b/src/com/android/launcher3/LauncherAppWidgetHostView.java
index 71fb2d2958..cf461a5b82 100644
--- a/src/com/android/launcher3/LauncherAppWidgetHostView.java
+++ b/src/com/android/launcher3/LauncherAppWidgetHostView.java
@@ -36,6 +36,7 @@ public class LauncherAppWidgetHostView extends AppWidgetHostView implements Touc
     LayoutInflater mInflater;
 
     private CheckLongPressHelper mLongPressHelper;
+    private StylusEventHelper mStylusEventHelper;
     private Context mContext;
     private int mPreviousOrientation;
     private DragLayer mDragLayer;
@@ -46,6 +47,7 @@ public class LauncherAppWidgetHostView extends AppWidgetHostView implements Touc
         super(context);
         mContext = context;
         mLongPressHelper = new CheckLongPressHelper(this);
+        mStylusEventHelper = new StylusEventHelper(this);
         mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
         mDragLayer = ((Launcher) context).getDragLayer();
         setAccessibilityDelegate(LauncherAppState.getInstance().getAccessibilityDelegate());
@@ -89,11 +91,17 @@ public class LauncherAppWidgetHostView extends AppWidgetHostView implements Touc
             return true;
         }
 
-        // Watch for longpress events at this level to make sure
-        // users can always pick up this widget
+        // Watch for longpress or stylus button press events at this level to
+        // make sure users can always pick up this widget
+        if (mStylusEventHelper.checkAndPerformStylusEvent(ev)) {
+            mLongPressHelper.cancelLongPress();
+            return true;
+        }
         switch (ev.getAction()) {
             case MotionEvent.ACTION_DOWN: {
-                mLongPressHelper.postCheckForLongPress();
+                if (!mStylusEventHelper.inStylusButtonPressed()) {
+                    mLongPressHelper.postCheckForLongPress();
+                }
                 mDragLayer.setTouchCompleteListener(this);
                 break;
             }