Merge pull request #125 from elfman/master

Enable change the drag and swipe movement direction and threshold by setters.
CymChad · Jul 3, 2016 · f65f8b7 · f65f8b7
2 parents b49dd0e + 17068dc
commit f65f8b7
Showing 1 changed file with 57 additions and 9 deletions.
diff --git a/library/src/main/java/com/chad/library/adapter/base/callback/ItemDragAndSwipeCallback.java b/library/src/main/java/com/chad/library/adapter/base/callback/ItemDragAndSwipeCallback.java
@@ -12,12 +12,15 @@ public class ItemDragAndSwipeCallback extends ItemTouchHelper.Callback {
 
 //    private static final String TAG = ItemDragAndSwipeCallback.class.getSimpleName();
 
-    private BaseQuickAdapter mAdapter;
+    BaseQuickAdapter mAdapter;
 
-    private static final float THRESHOLD_SWIPE = 0.7f;
-    private static final float THRESHOLD_MOVE = 0.1f;
+    float mMoveThreshold = 0.1f;
+    float mSwipeThreshold = 0.7f;
 
-    private int mActionState = ItemTouchHelper.ACTION_STATE_IDLE;
+    int mDragMoveFlags =  ItemTouchHelper.UP | ItemTouchHelper.DOWN | ItemTouchHelper.LEFT | ItemTouchHelper.RIGHT;
+    int mSwipeMoveFlags = ItemTouchHelper.END;
+
+    int mActionState = ItemTouchHelper.ACTION_STATE_IDLE;
 
     public ItemDragAndSwipeCallback(BaseQuickAdapter adapter) {
         mAdapter = adapter;
@@ -59,9 +62,7 @@ public void clearView(RecyclerView recyclerView, RecyclerView.ViewHolder viewHol
 
     @Override
     public int getMovementFlags(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder) {
-        int dragFlags = ItemTouchHelper.UP | ItemTouchHelper.DOWN | ItemTouchHelper.LEFT | ItemTouchHelper.RIGHT;
-        int swipeFlags = ItemTouchHelper.END;
-        return makeMovementFlags(dragFlags, swipeFlags);
+        return makeMovementFlags(mDragMoveFlags, mSwipeMoveFlags);
     }
 
     @Override
@@ -85,11 +86,58 @@ public void onSwiped(RecyclerView.ViewHolder viewHolder, int direction) {
 
     @Override
     public float getMoveThreshold(RecyclerView.ViewHolder viewHolder) {
-        return THRESHOLD_MOVE;
+        return mMoveThreshold;
     }
 
     @Override
     public float getSwipeThreshold(RecyclerView.ViewHolder viewHolder) {
-        return THRESHOLD_SWIPE;
+        return mSwipeThreshold;
+    }
+
+    /**
+     * Set the fraction that the user should move the View to be considered as swiped.
+     * The fraction is calculated with respect to RecyclerView's bounds.
+     * <p>
+     * Default value is .5f, which means, to swipe a View, user must move the View at least
+     * half of RecyclerView's width or height, depending on the swipe direction.
+     *
+     * @param swipeThreshold A float value that denotes the fraction of the View size. Default value
+     * is .8f .
+     */
+    public void setSwipeThreshold(float swipeThreshold) {
+        mSwipeThreshold = swipeThreshold;
+    }
+
+
+    /**
+     * Set the fraction that the user should move the View to be considered as it is
+     * dragged. After a view is moved this amount, ItemTouchHelper starts checking for Views
+     * below it for a possible drop.
+     *
+     * @param moveThreshold A float value that denotes the fraction of the View size. Default value is
+     * .1f .
+     */
+    public void setMoveThreshold(float moveThreshold) {
+        mMoveThreshold = moveThreshold;
+    }
+
+    /**
+     * <p>Set the drag movement direction.</p>
+     * <p>The value should be ItemTouchHelper.UP, ItemTouchHelper.DOWN, ItemTouchHelper.LEFT, ItemTouchHelper.RIGHT or their combination.</p>
+     * You can combine them like ItemTouchHelper.UP | ItemTouchHelper.DOWN, it means that the item could only move up and down when dragged.
+     * @param dragMoveFlags the drag movement direction. Default value is ItemTouchHelper.UP | ItemTouchHelper.DOWN | ItemTouchHelper.LEFT | ItemTouchHelper.RIGHT.
+     */
+    public void setDragMoveFlags(int dragMoveFlags) {
+        mDragMoveFlags = dragMoveFlags;
+    }
+
+    /**
+     * <p>Set the swipe movement direction.</p>
+     * <p>The value should be ItemTouchHelper.START, ItemTouchHelper.END or their combination.</p>
+     * You can combine them like ItemTouchHelper.START | ItemTouchHelper.END, it means that the item could swipe to both left or right.
+     * @param swipeMoveFlags the swipe movement direction. Default value is ItemTouchHelper.END.
+     */
+    public void setSwipeMoveFlags(int swipeMoveFlags) {
+        mSwipeMoveFlags = swipeMoveFlags;
     }
 }