/*
* Copyright (C) 2012 www.amsoft.cn
*
* 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.ab.view.sliding;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffXfermode;
import android.graphics.RectF;
import android.os.Handler;
import android.os.Message;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.widget.CheckBox;
import com.ab.util.AbLogUtil;
// TODO: Auto-generated Javadoc
/**
* © 2012 amsoft.cn
* 名称：AbSlidingButton.java
* 描述：滑动按钮
*
* @author 还如一梦中
* @version v1.0
* @date：2013-11-14 上午11:31:21
*/
public class AbSlidingButton extends CheckBox {
/** The context. */
private Context context;
//图片资源
/** The btn frame. */
private Bitmap btnFrame;
/** The btn mask. */
private Bitmap btnMask;
/** The btn bottom. */
private Bitmap btnBottom;
/** The m btn normal. */
private Bitmap mBtnNormal;
/** The m btn pressed. */
private Bitmap mBtnPressed;
/** The on checked change listener. */
private OnCheckedChangeListener onCheckedChangeListener;
//记录开关当前的状态
/** The is checked. */
private boolean isChecked;
//背景的宽高
/** The m mask height. */
private float mMaskHeight;
/** The m mask width. */
private float mMaskWidth;
/** The m btn off pos. */
private float mBtnOffPos;
/** The m btn on pos. */
private float mBtnOnPos;
/** The m btn pos. */
private float mBtnPos;
/** The m last btn pos. */
private float mLastBtnPos;
/** The m real pos. */
private float mRealPos;
/** The m btn width. */
private float mBtnWidth;
//Y方向的延伸
/** The m extend offset y. */
private float mExtendOffsetY;
/** The m alpha. */
private int mAlpha;
/** The m paint. */
private Paint mPaint;
/** The m xfermode. */
private PorterDuffXfermode mXfermode;
/** The m save layer rect f. */
private RectF mSaveLayerRectF;
/** The m cur btn pic. */
private Bitmap mCurBtnPic;
/** The m first down x. */
private float mFirstDownX;
/** The m move event. */
private boolean mMoveEvent;
/** The m animating. */
private boolean mAnimating;
/** The m animation position. */
private float mAnimationPosition;
/** The m animated velocity. */
private float mAnimatedVelocity;
/** The handler. */
private Handler handler = new Handler() {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case 0:
mRealPos = getRealPos((Float)msg.obj);
mLastBtnPos = (Float)msg.obj;
invalidate();
break;
default:
break;
}
}
};
/**
* Instantiates a new ab sliding button.
*
* @param context the context
*/
public AbSlidingButton(Context context) {
super(context);
init(context);
}
/**
* Instantiates a new ab sliding button.
*
* @param context the context
* @param attrs the attrs
*/
public AbSlidingButton(Context context, AttributeSet attrs) {
super(context, attrs);
init(context);
}
/**
* Inits the.
*
* @param context the context
*/
private void init(Context context) {
this.context = context;
this.mAlpha = 255;
this.isChecked = false;
this.mPaint = new Paint();
this.mPaint.setColor(Color.WHITE);
float density = getResources().getDisplayMetrics().density;
this.mAnimatedVelocity = (int)(0.5F + 350.0F * density);
}
/* (non-Javadoc)
* @see android.widget.CompoundButton#onDraw(android.graphics.Canvas)
*/
protected void onDraw(Canvas canvas){
//设置一个透明度为255的图层
canvas.saveLayerAlpha(this.mSaveLayerRectF, this.mAlpha,Canvas.ALL_SAVE_FLAG);
canvas.drawBitmap(this.btnMask, 0F, this.mExtendOffsetY, this.mPaint);
//混合绘制，取两层绘制交集。显示上层。btnBottom的长度超出btnMask的部分不绘制
this.mPaint.setXfermode(this.mXfermode);
canvas.drawBitmap(this.btnBottom, this.mRealPos, this.mExtendOffsetY, this.mPaint);
this.mPaint.setXfermode(null);
canvas.drawBitmap(this.btnFrame, 0F, this.mExtendOffsetY, this.mPaint);
canvas.drawBitmap(this.mCurBtnPic, this.mRealPos, 0.40000000596046448F + this.mExtendOffsetY, this.mPaint);
canvas.restore();
}
/**
* 描述：测量View的宽高.
*
* @param paramInt1 the param int1
* @param paramInt2 the param int2
* @see android.view.View#onMeasure(int, int)
*/
protected void onMeasure(int paramInt1, int paramInt2){
setMeasuredDimension((int)this.mMaskWidth, (int)(this.mMaskHeight + 2F * this.mExtendOffsetY));
}
/**
* 描述：设置图片资源.
*
* @version v1.0
* @param btnBottomResource the btn bottom resource
* @param btnFrameResource the btn frame resource
* @param btnMaskResource the btn mask resource
* @param btnNormalResource the btn normal resource
* @param btnPressedResource the btn pressed resource
* @date：2013-11-29 下午3:26:42
*/
public void setImageResource(int btnBottomResource,int btnFrameResource,int btnMaskResource, int btnNormalResource,int btnPressedResource) {
btnBottom = BitmapFactory.decodeResource(context.getResources(),btnBottomResource);
btnFrame = BitmapFactory.decodeResource(context.getResources(),btnFrameResource);
btnMask = BitmapFactory.decodeResource(context.getResources(),btnMaskResource);
mBtnNormal = BitmapFactory.decodeResource(context.getResources(),btnNormalResource);
mBtnPressed = BitmapFactory.decodeResource(context.getResources(),btnPressedResource);
this.mMaskWidth = this.btnMask.getWidth();
this.mMaskHeight = this.btnMask.getHeight();
float density = getResources().getDisplayMetrics().density;
this.mExtendOffsetY = (int)(0.5F + density * 0F);
this.mSaveLayerRectF = new RectF(-20.0F, this.mExtendOffsetY, 20 + this.mMaskWidth, this.mMaskHeight + this.mExtendOffsetY);
this.mXfermode = new PorterDuffXfermode(PorterDuff.Mode.SRC_IN);
this.mCurBtnPic = this.mBtnNormal;
this.mBtnWidth = this.mBtnPressed.getWidth();
this.mBtnOnPos = (this.mBtnWidth / 2F);
this.mBtnOffPos = (this.mMaskWidth - this.mBtnWidth / 2F);
if (isChecked){
this.mBtnPos = mBtnOnPos;
}else{
this.mBtnPos = mBtnOffPos;
}
this.mRealPos = getRealPos(this.mBtnPos);
}
/**
* Gets the real pos.
*
* @param paramFloat the param float
* @return the real pos
*/
private float getRealPos(float paramFloat){
return (paramFloat - this.mBtnWidth / 2F);
}
/**
* 描述：获得当前.
*
* @version v1.0
* @return true, if is checked
* @see android.widget.CompoundButton#isChecked()
* @author: amsoft.cn
* @date：2013-11-29 下午3:54:47
*/
public boolean isChecked() {
return isChecked;
}
/**
* 描述：设置选中.
*
* @version v1.0
* @param checked the new checked
* @see android.widget.CompoundButton#setChecked(boolean)
* @author: amsoft.cn
* @date：2013-11-29 下午3:54:33
*/
public void setChecked(boolean checked) {
setChecked(checked,false);
}
/**
* 描述：设置选中.
*
* @version v1.0
* @param checked the checked
* @param anim the anim
* @see android.widget.CompoundButton#setChecked(boolean)
* @author: amsoft.cn
* @date：2013-11-29 下午3:54:33
*/
public void setChecked(boolean checked,boolean anim) {
if(checked){
this.mBtnPos = this.mBtnOnPos;
}else{
this.mBtnPos = this.mBtnOffPos;
}
if(anim){
startAnimation();
}else{
moveViewToTarget();
}
}
/**
* 描述：设置监听器.
*
* @version v1.0
* @param listener the new on checked change listener
* @see android.widget.CompoundButton#setOnCheckedChangeListener(android.widget.CompoundButton.OnCheckedChangeListener)
* @author: amsoft.cn
* @date：2013-11-29 下午3:54:20
*/
public void setOnCheckedChangeListener(OnCheckedChangeListener listener) {
onCheckedChangeListener = listener;
}
/**
* 描述：滑动事件.
*
* @version v1.0
* @param event the event
* @return true, if successful
* @see android.widget.TextView#onTouchEvent(android.view.MotionEvent)
* @author: amsoft.cn
* @date：2013-12-5 上午11:22:12
*/
public boolean onTouchEvent(MotionEvent event){
if(this.mAnimating){
return true;
}
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
mMoveEvent = false;
//当前点击位置
this.mFirstDownX = event.getX();
//点击效果
this.mCurBtnPic = this.mBtnPressed;
//当前滑块再的位置
if (this.isChecked){
this.mBtnPos = this.mBtnOnPos;
}else{
this.mBtnPos = this.mBtnOffPos;
}
mLastBtnPos = mBtnPos;
AbLogUtil.d(AbSlidingButton.class, "原来的X位置："+this.mBtnPos);
break;
case MotionEvent.ACTION_MOVE:
AbLogUtil.d(AbSlidingButton.class, "－－－－移动－－－－");
//当前点击位置
float x = event.getX();
//差
float offsetX = x - this.mFirstDownX;
AbLogUtil.d(AbSlidingButton.class, "X需要移动："+offsetX);
//转换为点击事件
if(Math.abs(offsetX) < 5){
break;
}else{
mMoveEvent = true;
}
this.mFirstDownX = event.getX();
//移动后的应该在的位置
this.mBtnPos = this.mBtnPos + offsetX;
AbLogUtil.d(AbSlidingButton.class, "现在的X位置："+this.mBtnPos);
//超出控件的设置
if (this.mBtnPos < this.mBtnOffPos){
this.mBtnPos = this.mBtnOffPos;
}
if (this.mBtnPos > this.mBtnOnPos){
this.mBtnPos = this.mBtnOnPos;
}
moveViewToTarget();
break;
default:
if(mMoveEvent){
AbLogUtil.d(AbSlidingButton.class, "－－－－弹起－－－－");
//弹起
this.mCurBtnPic = this.mBtnNormal;
//本次移动最后结果
if (this.mBtnPos < (this.mBtnOnPos-this.mBtnOffPos) / 2F + this.mBtnOffPos){
this.mBtnPos = this.mBtnOffPos;
}else{
this.mBtnPos = this.mBtnOnPos;
}
startAnimation();
offsetX = 0;
}else{
//点击事件
setChecked(!isChecked,true);
}
break;
}
return true;
}
/**
* 描述：滑块移动.
*
* @version v1.0
* @param pos the pos
* @date：2013-12-5 上午11:46:56
*/
private void moveView(float pos){
moveView(pos,false);
}
/**
* 描述：滑块移动.
*
* @version v1.0
* @param pos the pos
* @param delay the delay
* @date：2013-12-5 上午11:46:56
*/
private void moveView(final float pos,boolean delay){
if(handler!=null){
handler.obtainMessage(0, pos).sendToTarget();
}
}
/**
* 描述：用位移加速度实现动画.
*
* @version v1.0
* @date：2013-12-9 上午9:47:59
*/
private void startAnimation(){
//已经在目标位置
if(mLastBtnPos == this.mBtnPos){
return;
}
this.mAnimating = true;
AbLogUtil.d(AbSlidingButton.class, "目标移动X到："+this.mBtnPos+",当前在:"+mLastBtnPos);
float mVelocity = this.mAnimatedVelocity;
if(mLastBtnPos > this.mBtnPos){
mVelocity = -this.mAnimatedVelocity;
}
this.mAnimationPosition = mLastBtnPos;
int i = 0;
while(true){
this.mAnimationPosition = (this.mAnimationPosition + 16.0F * mVelocity / 1000.0F);
AbLogUtil.d(AbSlidingButton.class, i+"次移动X到："+this.mAnimationPosition);
if(this.mAnimationPosition >= this.mBtnOnPos){
this.mAnimationPosition = this.mBtnOnPos;
moveView(this.mAnimationPosition,true);
if(!isChecked){
isChecked = true;
if(onCheckedChangeListener!=null){
onCheckedChangeListener.onCheckedChanged(this, isChecked);
}
}
break;
}else if(this.mAnimationPosition <= this.mBtnOffPos){
this.mAnimationPosition = this.mBtnOffPos;
moveView(this.mAnimationPosition,true);
if(isChecked){
isChecked = false;
if(onCheckedChangeListener!=null){
onCheckedChangeListener.onCheckedChanged(this, isChecked);
}
}
break;
}else{
moveView(this.mAnimationPosition,true);
}
i++;
}
this.mAnimating = false;
}
/**
* 描述：直接移动到位置.
*
* @version v1.0
* @date：2013-12-9 上午9:20:38
*/
private void moveViewToTarget(){
moveView(this.mBtnPos);
if (this.mBtnPos == this.mBtnOnPos){
if(!isChecked){
isChecked = true;
if(onCheckedChangeListener!=null){
onCheckedChangeListener.onCheckedChanged(this, isChecked);
}
}
return;
}else if(this.mBtnPos == this.mBtnOffPos){
if(isChecked){
isChecked = false;
if(onCheckedChangeListener!=null){
onCheckedChangeListener.onCheckedChanged(this, isChecked);
}
}
return;
}
}
/* (non-Javadoc)
* @see android.widget.CompoundButton#performClick()
*/
@Override
public boolean performClick() {
setChecked(!isChecked);
return true;
}
/* (non-Javadoc)
* @see android.widget.CompoundButton#toggle()
*/
@Override
public void toggle() {
this.setChecked(!isChecked);
}
}