| /* |
| * 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; |
| } |
| } |