71 lines
1.9 KiB
Java
71 lines
1.9 KiB
Java
/*
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* Copyright 2016 Hippo Seven
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.hippo.glgallery;
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import android.view.MotionEvent;
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class DownUpDetector {
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private final DownUpListener mListener;
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private boolean mStillDown;
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public DownUpDetector(DownUpListener listener) {
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mListener = listener;
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}
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private void setState(boolean down, MotionEvent e) {
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if (down == mStillDown) return;
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mStillDown = down;
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if (down) {
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mListener.onDown(e);
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} else {
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mListener.onUp(e);
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}
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}
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public void onTouchEvent(MotionEvent ev) {
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switch (ev.getActionMasked()) {
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case MotionEvent.ACTION_DOWN:
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setState(true, ev);
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break;
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case MotionEvent.ACTION_POINTER_DOWN:
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mListener.onPointerDown(ev);
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break;
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case MotionEvent.ACTION_UP:
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mListener.onPointerUp(ev);
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setState(false, ev);
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break;
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case MotionEvent.ACTION_CANCEL:
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setState(false, ev);
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break;
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}
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}
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public boolean isDown() {
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return mStillDown;
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}
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public interface DownUpListener {
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void onDown(MotionEvent e);
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void onUp(MotionEvent e);
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void onPointerDown(MotionEvent e);
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void onPointerUp(MotionEvent e);
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}
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}
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