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/*
* 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;
}
}
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