making size of delete zone & info button larger

- only on XLarge devices
- make application info button inactive when its not visible
- making scroll right "dead" zone bigger so users don't trigger accidental scroll when deleting items

Change-Id: I474de710a80b165d2ce1553c9231a829679132b2

src/com/android/launcher2/ApplicationInfoDropTarget.java

@@ -21,6 +21,7 @@ import android.content.Context;
 import android.graphics.Paint;
 import android.graphics.PorterDuff;
 import android.graphics.PorterDuffColorFilter;
+import android.graphics.Rect;
 import android.util.AttributeSet;
 import android.view.View;
 import android.widget.ImageView;
@@ -98,9 +99,8 @@ public class ApplicationInfoDropTarget extends ImageView implements DropTarget,
 
     public void onDragStart(DragSource source, Object info, int dragAction) {
         if (info != null) {
-            mActive = true;
-
             if (mManageVisibility) {
+                mActive = true;
                 // Only show the info icon when an application is selected
                 if (((ItemInfo)info).itemType == LauncherSettings.Favorites.ITEM_TYPE_APPLICATION) {
                     setVisibility(VISIBLE);
@@ -111,7 +111,7 @@ public class ApplicationInfoDropTarget extends ImageView implements DropTarget,
     }
 
     public boolean isDropEnabled() {
-        return true;
+        return mActive;
     }
 
     public void onDragEnd() {
@@ -124,6 +124,17 @@ public class ApplicationInfoDropTarget extends ImageView implements DropTarget,
         }
     }
 
+    @Override
+    public void getHitRect(Rect outRect) {
+        super.getHitRect(outRect);
+        if (LauncherApplication.isScreenXLarge()) {
+            outRect.top -= 50;
+            outRect.left -= 50;
+            outRect.bottom += 50;
+            outRect.right += 50;
+        }
+    }
+
     void setLauncher(Launcher launcher) {
         mLauncher = launcher;
     }