templates/CardStream/_MODULE_/src/template/java/_PACKAGE_/CardLayout.java.ftl

<#ftl>
<#--
        Copyright 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 ${sample.package};

import android.content.Context;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.ViewConfiguration;
import android.widget.RelativeLayout;

/**
 * Custom Button with a special 'pressed' effect for touch events.
 */
public class CardLayout extends RelativeLayout {

    private boolean mSwiping = false;
    private float mDownX = 0.f;
    private float mDownY = 0.f;
    private float mTouchSlop = 0.f;

    public CardLayout(Context context) {
        super(context);
        init();
    }

    public CardLayout(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }

    public CardLayout(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        init();
    }

    private void init(){
        setFocusable(true);
        setDescendantFocusability(FOCUS_AFTER_DESCENDANTS);
        setWillNotDraw(false);
        setClickable(true);

        mTouchSlop = ViewConfiguration.get(getContext()).getScaledTouchSlop() * 2.f;
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        switch(event.getAction()){
            case MotionEvent.ACTION_CANCEL:
            case MotionEvent.ACTION_UP:
                mSwiping = false;
                break;
        }
        return super.onTouchEvent(event);
    }

    @Override
    public boolean onInterceptTouchEvent(MotionEvent event) {

        switch(event.getAction()){
            case MotionEvent.ACTION_MOVE:
                if( !mSwiping ){
                    mSwiping = Math.abs(mDownX - event.getX()) > mTouchSlop;
                }
                break;
            case MotionEvent.ACTION_DOWN:
                mDownX = event.getX();
                mDownY = event.getY();
                mSwiping = false;
                break;
            case MotionEvent.ACTION_CANCEL:
            case MotionEvent.ACTION_UP:
                mSwiping = false;
                break;
        }
        return mSwiping;
    }
}