134 lines
4.8 KiB
Java
134 lines
4.8 KiB
Java
/*
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* Copyright 2015 Synced Synapse. All rights reserved.
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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 org.xbmc.kore.utils;
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import android.os.Handler;
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import android.view.MotionEvent;
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import android.view.SoundEffectConstants;
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import android.view.View;
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import android.view.animation.Animation;
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import android.widget.Button;
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import android.widget.ImageButton;
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/**
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* A class, that can be used as a TouchListener on any view (e.g. a Button).
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* It cyclically runs a clickListener, emulating keyboard-like behaviour. First
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* click is fired immediately, next after initialInterval, and subsequent after
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* repeatInterval.
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*
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* <p>Interval is scheduled after the onClick completes, so it has to run fast.
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* If it runs slow, it does not generate skipped onClicks.
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*/
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public class RepeatListener implements View.OnTouchListener {
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private static final String TAG = LogUtils.makeLogTag(RepeatListener.class);
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private static Handler repeatHandler = new Handler();
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private int initialInterval;
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private final int repeatInterval;
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private final View.OnClickListener clickListener;
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private Runnable handlerRunnable = new Runnable() {
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@Override
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public void run() {
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if (downView.isShown()) {
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if (repeatInterval >= 0) {
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repeatHandler.postDelayed(this, repeatInterval);
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}
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clickListener.onClick(downView);
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}
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}
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};
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/**
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* Animations for down/up
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*/
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private Animation animDown;
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private Animation animUp;
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private View downView;
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/**
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* Constructor for a repeat listener
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*
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* @param initialInterval The interval after first click event
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* @param repeatInterval The interval after second and subsequent click events
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* @param clickListener The OnClickListener, that will be called periodically
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*/
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public RepeatListener(int initialInterval, int repeatInterval, View.OnClickListener clickListener) {
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this(initialInterval, repeatInterval, clickListener, null, null);
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}
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/**
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* Constructor for a repeat listener, with animation
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*
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* @param initialInterval The interval after first click event. If negative, no repeat will occur
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* @param repeatInterval The interval after second and subsequent click events. If negative, no repeat will occur
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* @param clickListener The OnClickListener, that will be called periodically
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* @param animDown Animation to play on touch
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* @param animUp Animation to play on release
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*/
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public RepeatListener(int initialInterval, int repeatInterval, View.OnClickListener clickListener,
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Animation animDown, Animation animUp) {
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this.initialInterval = initialInterval;
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this.repeatInterval = repeatInterval;
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this.clickListener = clickListener;
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this.animDown = animDown;
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this.animUp = animUp;
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}
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/**
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* Handle touch events.
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*
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* Note: For buttons, this event Handler returns false, so that the other event handlers
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* of buttons get called. For other views this event Handler consumes the event
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* @param view
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* @param motionEvent
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* @return
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*/
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public boolean onTouch(View view, MotionEvent motionEvent) {
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switch (motionEvent.getAction()) {
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case MotionEvent.ACTION_DOWN:
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repeatHandler.removeCallbacks(handlerRunnable);
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if (initialInterval >= 0) {
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repeatHandler.postDelayed(handlerRunnable, initialInterval);
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}
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downView = view;
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if (animDown != null) {
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animDown.setFillAfter(true);
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view.startAnimation(animDown);
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}
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break;
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case MotionEvent.ACTION_UP:
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clickListener.onClick(view);
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view.playSoundEffect(SoundEffectConstants.CLICK);
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// Fallthrough
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case MotionEvent.ACTION_CANCEL:
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repeatHandler.removeCallbacks(handlerRunnable);
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downView = null;
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if (animUp != null) {
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view.startAnimation(animUp);
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}
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break;
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}
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// Consume the event for views other than buttons
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return !((view instanceof Button) || (view instanceof ImageButton));
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}
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} |