1 files changed, 111 insertions, 0 deletions
diff --git a/src/com/android/gallery3d/filtershow/editors/SwapButton.java b/src/com/android/gallery3d/filtershow/editors/SwapButton.java
new file mode 100644
index 000000000..bb4432e28
--- /dev/null
+++ b/src/com/android/gallery3d/filtershow/editors/SwapButton.java
@@ -0,0 +1,111 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.gallery3d.filtershow.editors;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.view.GestureDetector;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.MotionEvent;
+import android.widget.Button;
+
+public class SwapButton extends Button implements GestureDetector.OnGestureListener {
+
+    public static int ANIM_DURATION = 200;
+
+    public interface SwapButtonListener {
+        public void swapLeft(MenuItem item);
+        public void swapRight(MenuItem item);
+    }
+
+    private GestureDetector mDetector;
+    private SwapButtonListener mListener;
+    private Menu mMenu;
+    private int mCurrentMenuIndex;
+
+    public SwapButton(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        mDetector = new GestureDetector(context, this);
+    }
+
+    public SwapButtonListener getListener() {
+        return mListener;
+    }
+
+    public void setListener(SwapButtonListener listener) {
+        mListener = listener;
+    }
+
+    public boolean onTouchEvent(MotionEvent me) {
+        if (!mDetector.onTouchEvent(me)) {
+            return super.onTouchEvent(me);
+        }
+        return true;
+    }
+
+    @Override
+    public boolean onDown(MotionEvent e) {
+        return true;
+    }
+
+    @Override
+    public void onShowPress(MotionEvent e) {
+    }
+
+    @Override
+    public boolean onSingleTapUp(MotionEvent e) {
+        callOnClick();
+        return true;
+    }
+
+    @Override
+    public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
+        return false;
+    }
+
+    @Override
+    public void onLongPress(MotionEvent e) {
+    }
+
+    @Override
+    public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
+        if (mMenu == null) {
+            return false;
+        }
+        if (e1.getX() - e2.getX() > 0) {
+            // right to left
+            mCurrentMenuIndex++;
+            if (mCurrentMenuIndex == mMenu.size()) {
+                mCurrentMenuIndex = 0;
+            }
+            if (mListener != null) {
+                mListener.swapRight(mMenu.getItem(mCurrentMenuIndex));
+            }
+        } else {
+            // left to right
+            mCurrentMenuIndex--;
+            if (mCurrentMenuIndex < 0) {
+                mCurrentMenuIndex = mMenu.size() - 1;
+            }
+            if (mListener != null) {
+                mListener.swapLeft(mMenu.getItem(mCurrentMenuIndex));
+            }
+        }
+        return true;
+    }
+}