package com.pan.simplepicture.widget;
import android.content.Context;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Paint.Cap;
import android.graphics.Paint.Style;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.view.View;
import com.facebook.rebound.SimpleSpringListener;
import com.facebook.rebound.Spring;
import com.facebook.rebound.SpringConfig;
import com.facebook.rebound.SpringSystem;
import com.facebook.rebound.SpringUtil;
import com.pan.simplepicture.R;
/**
* @author ThinkPad
*/
public class ToggleButton extends View {
private SpringSystem springSystem;
private Spring spring;
/** */
private float radius;
/**
* 开启颜色
*/
private int onColor = Color.parseColor("#4ebb7f");
/**
* 关闭颜色
*/
private int offBorderColor = Color.parseColor("#dadbda");
/**
* 灰色带颜色
*/
private int offColor = Color.parseColor("#ffffff");
/**
* 手柄颜色
*/
private int spotColor = Color.parseColor("#ffffff");
/**
* 边框颜色
*/
private int borderColor = offBorderColor;
/**
* 画笔
*/
private Paint paint;
/**
* 开关状态
*/
private boolean toggleOn = false;
/**
* 边框大小
*/
private int borderWidth = 2;
/**
* 垂直中心
*/
private float centerY;
/**
* 按钮的开始和结束位置
*/
private float startX, endX;
/**
* 手柄X位置的最小和最大值
*/
private float spotMinX, spotMaxX;
/**
* 手柄大小
*/
private int spotSize;
/**
* 手柄X位置
*/
private float spotX;
/**
* 关闭时内部灰色带高度
*/
private float offLineWidth;
/** */
private RectF rect = new RectF();
/**
* 默认使用动画
*/
private boolean defaultAnimate = true;
private OnToggleChanged listener;
private ToggleButton(Context context) {
super(context);
}
public ToggleButton(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
setup(attrs);
}
public ToggleButton(Context context, AttributeSet attrs) {
super(context, attrs);
setup(attrs);
}
@Override
protected void onDetachedFromWindow() {
super.onDetachedFromWindow();
spring.removeListener(springListener);
}
public void onAttachedToWindow() {
super.onAttachedToWindow();
spring.addListener(springListener);
}
public void setup(AttributeSet attrs) {
paint = new Paint(Paint.ANTI_ALIAS_FLAG);
paint.setStyle(Style.FILL);
paint.setStrokeCap(Cap.ROUND);
springSystem = SpringSystem.create();
spring = springSystem.createSpring();
spring.setSpringConfig(SpringConfig.fromOrigamiTensionAndFriction(50, 7));
this.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
toggle(defaultAnimate);
}
});
TypedArray typedArray = getContext().obtainStyledAttributes(attrs, R.styleable.ToggleButton);
offBorderColor = typedArray.getColor(R.styleable.ToggleButton_offBordColor, offBorderColor);
onColor = typedArray.getColor(R.styleable.ToggleButton_onColor, onColor);
spotColor = typedArray.getColor(R.styleable.ToggleButton_spotColor, spotColor);
offColor = typedArray.getColor(R.styleable.ToggleButton_offColor, offColor);
borderWidth = typedArray.getDimensionPixelSize(R.styleable.ToggleButton_bordWidth, borderWidth);
defaultAnimate = typedArray.getBoolean(R.styleable.ToggleButton_animate, defaultAnimate);
typedArray.recycle();
borderColor = offBorderColor;
}
public void toggle() {
toggle(true);
}
public void toggle(boolean animate) {
toggleOn = !toggleOn;
takeEffect(animate);
if (listener != null) {
listener.onToggle(this, toggleOn);
}
}
public void toggleOn() {
setToggleOn();
if (listener != null) {
listener.onToggle(this, toggleOn);
}
}
public void toggleOff() {
setToggleOff();
if (listener != null) {
listener.onToggle(this, toggleOn);
}
}
/**
* 设置显示成打开样式，不会触发toggle事件
*/
public void setToggleOn() {
setToggleOn(true);
}
/**
* @param animate
*/
public void setToggleOn(boolean animate) {
toggleOn = true;
takeEffect(animate);
}
/**
* 设置显示成关闭样式，不会触发toggle事件
*/
public void setToggleOff() {
setToggleOff(true);
}
public void setToggleOff(boolean animate) {
toggleOn = false;
takeEffect(animate);
}
private void takeEffect(boolean animate) {
if (animate) {
spring.setEndValue(toggleOn ? 1 : 0);
} else {
//这里没有调用spring，所以spring里的当前值没有变更，这里要设置一下，同步两边的当前值
spring.setCurrentValue(toggleOn ? 1 : 0);
calculateEffect(toggleOn ? 1 : 0);
}
}
public void setChecked(boolean checked) {
if (checked) {
setToggleOn(true);
} else {
setToggleOff(true);
}
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
final int widthMode = MeasureSpec.getMode(widthMeasureSpec);
final int heightMode = MeasureSpec.getMode(heightMeasureSpec);
int widthSize = MeasureSpec.getSize(widthMeasureSpec);
int heightSize = MeasureSpec.getSize(heightMeasureSpec);
Resources r = Resources.getSystem();
if (widthMode == MeasureSpec.UNSPECIFIED || widthMode == MeasureSpec.AT_MOST) {
widthSize = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 50, r.getDisplayMetrics());
widthMeasureSpec = MeasureSpec.makeMeasureSpec(widthSize, MeasureSpec.EXACTLY);
}
if (heightMode == MeasureSpec.UNSPECIFIED || heightSize == MeasureSpec.AT_MOST) {
heightSize = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 30, r.getDisplayMetrics());
heightMeasureSpec = MeasureSpec.makeMeasureSpec(heightSize, MeasureSpec.EXACTLY);
}
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
}
@Override
protected void onLayout(boolean changed, int left, int top, int right,
int bottom) {
super.onLayout(changed, left, top, right, bottom);
final int width = getWidth();
final int height = getHeight();
radius = Math.min(width, height) * 0.5f;
centerY = radius;
startX = radius;
endX = width - radius;
spotMinX = startX + borderWidth;
spotMaxX = endX - borderWidth;
spotSize = height - 4 * borderWidth;
spotX = toggleOn ? spotMaxX : spotMinX;
offLineWidth = 0;
}
SimpleSpringListener springListener = new SimpleSpringListener() {
@Override
public void onSpringUpdate(Spring spring) {
final double value = spring.getCurrentValue();
calculateEffect(value);
}
};
private int clamp(int value, int low, int high) {
return Math.min(Math.max(value, low), high);
}
@Override
public void draw(Canvas canvas) {
//
rect.set(0, 0, getWidth(), getHeight());
paint.setColor(borderColor);
canvas.drawRoundRect(rect, radius, radius, paint);
if (offLineWidth > 0) {
final float cy = offLineWidth * 0.5f;
rect.set(spotX - cy, centerY - cy, endX + cy, centerY + cy);
paint.setColor(offColor);
canvas.drawRoundRect(rect, cy, cy, paint);
}
rect.set(spotX - 1 - radius, centerY - radius, spotX + 1.1f + radius, centerY + radius);
paint.setColor(borderColor);
canvas.drawRoundRect(rect, radius, radius, paint);
final float spotR = spotSize * 0.5f;
rect.set(spotX - spotR, centerY - spotR, spotX + spotR, centerY + spotR);
paint.setColor(spotColor);
canvas.drawRoundRect(rect, spotR, spotR, paint);
}
/**
* @param value
*/
private void calculateEffect(final double value) {
final float mapToggleX = (float) SpringUtil.mapValueFromRangeToRange(value, 0, 1, spotMinX, spotMaxX);
spotX = mapToggleX;
float mapOffLineWidth = (float) SpringUtil.mapValueFromRangeToRange(1 - value, 0, 1, 10, spotSize);
offLineWidth = mapOffLineWidth;
final int fb = Color.blue(onColor);
final int fr = Color.red(onColor);
final int fg = Color.green(onColor);
final int tb = Color.blue(offBorderColor);
final int tr = Color.red(offBorderColor);
final int tg = Color.green(offBorderColor);
int sb = (int) SpringUtil.mapValueFromRangeToRange(1 - value, 0, 1, fb, tb);
int sr = (int) SpringUtil.mapValueFromRangeToRange(1 - value, 0, 1, fr, tr);
int sg = (int) SpringUtil.mapValueFromRangeToRange(1 - value, 0, 1, fg, tg);
sb = clamp(sb, 0, 255);
sr = clamp(sr, 0, 255);
sg = clamp(sg, 0, 255);
borderColor = Color.rgb(sr, sg, sb);
postInvalidate();
}
/**
* @author ThinkPad
*/
public interface OnToggleChanged {
/**
* @param on
*/
public void onToggle(ToggleButton toggleButton, boolean on);
}
public void setOnToggleChanged(OnToggleChanged onToggleChanged) {
listener = onToggleChanged;
}
public boolean isAnimate() {
return defaultAnimate;
}
public void setAnimate(boolean animate) {
this.defaultAnimate = animate;
}
}