package com.zms.timelineview;

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.view.View;

public class TimeLineView extends View {

 private Paint mPaint;
 /**
 * 首個節點的外半徑
 */
 private float timelineHeadRadius;
 /**
 * 首個節點的中心顏色
 */
 private int timelineHeadColor;
 /**
 * 首個節點的邊緣顏色
 */
 private int timelineHeadColorEdge;
 /**
 * 其他節點的顏色值
 */
 private int timelineOtherColor;
 /**
 * 時間線的節點數
 */
 private int timelineCount;
 /**
 * 時間軸的位置
 */
 private int viewWidth;
 /**
 * 時間軸到距離頂部的距離
 */
 private int marginTop;
 /**
 * 時間軸的節點的半徑
 */
 private int timelineRadius;
 /**
 * 時間軸節點之間的距離
 */
 private int timelineRadiusDistance;
 /**
 * 時間軸的寬度
 */
 private int timelineWidth;
 /**
 * 時間軸的高度
 */
 private float timeLineViewHeight;

 public TimeLineView(Context context) {
 this(context, null);
 }

 public TimeLineView(Context context, AttributeSet attrs) {
 this(context, attrs, 0);
 }

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

 /**
 * 初始化
 * 
 * @param context
 * @param attrs
 * @param defStyle
 */
 private void init(Context context, AttributeSet attrs, int defStyle) {

 final TypedArray a = getContext().obtainStyledAttributes(attrs,
  R.styleable.TimeLineView, defStyle, 0);
 timelineRadiusDistance = (int) a.getDimension(
  R.styleable.TimeLineView_timelineRadiusDistance,
  convertDIP2PX(context, 20));
 timelineHeadRadius = a.getDimension(
  R.styleable.TimeLineView_timelineHeadRadius,
  convertDIP2PX(context, 6));
 timelineRadius = (int) a.getDimension(
  R.styleable.TimeLineView_timelineRadius,
  convertDIP2PX(context, 5));
 timelineHeadColor = a.getColor(
  R.styleable.TimeLineView_timelineHeadColor,
  Color.parseColor("#25ae5f")); // 中心深色
 timelineHeadColorEdge = a.getColor(
  R.styleable.TimeLineView_timelineHeadColorEdge,
  Color.parseColor("#b9e5cc")); // 邊緣淺色
 timelineOtherColor = a.getColor(
  R.styleable.TimeLineView_timelineOtherColor,
  Color.parseColor("#cccccc"));
 timelineCount = a.getInteger(R.styleable.TimeLineView_timelineCount, 0);
 timelineWidth = (int) a.getDimension(
  R.styleable.TimeLineView_timelineWidth,
  convertDIP2PX(context, 1));
 marginTop = (int) a.getDimension(
  R.styleable.TimeLineView_timelineMarginTop,
  convertDIP2PX(context, 50));
 a.recycle();

 mPaint = new Paint();
 mPaint.setAntiAlias(true);

 }

 @Override
 protected void onDraw(Canvas canvas) {
 // 默認設置時間軸的位置位于view的中間
 viewWidth = getMeasuredWidth() / 2;
 // 設置第一個節點的顏色
 mPaint.setColor(timelineHeadColor);
 /**
  * 根據時間軸的節點數目，畫對應的節點和軸
  */
 for (int j = 1; j <= timelineCount; j++) {

  /**
  * 當j==1，畫第一個節點的時候，有點特殊，我們需要在節點的外面再換一個圓環
  */
  if (j == 1) {
  // 畫筆設置為空心
  canvas.drawCircle(viewWidth, timelineHeadRadius + marginTop,
   timelineRadius, mPaint);
  mPaint.setStyle(Paint.Style.STROKE);
  mPaint.setStrokeWidth(5.0f);
  // 畫第一個節點外圍的圓環
  mPaint.setColor(timelineHeadColorEdge);
  canvas.drawCircle(viewWidth, timelineHeadRadius + marginTop,
   timelineHeadRadius, mPaint);
  // 設置畫筆顏色，畫其他時間節點的顏色
  mPaint.setColor(timelineOtherColor);
  // 畫筆設置為實心
  mPaint.setStyle(Paint.Style.FILL);
  /**
   * 畫第一個節點下面的軸
   */
  canvas.drawRect(new Rect(viewWidth - timelineWidth / 2,
   (int) (2 * timelineHeadRadius + marginTop) + 5,
   viewWidth + timelineWidth / 2, (int) (2
    * timelineHeadRadius + timelineRadiusDistance
    + marginTop + 5)), mPaint);
  continue;
  }
  /**
  * 畫時間軸的節點,即畫圓形 圓心的x都是一樣的,view的中間
  * 圓心的y的計算是根據節點的位置來計算的,例如:第一個節點的y是根據第一個節點距離上面的距離加上第一個節點的半徑
  * :timelineHeadRadius + marginTop
  * 其余的節點就是在一個節點的y的基礎上,加上兩倍半徑和節點之間的軸的長度＊節點數:(2 * timelineRadius +
  * timelineRadiusDistance) * (j - 1) + timelineHeadRadius -
  * timelineRadius + marginTop
  * 
  */
  canvas.drawCircle(viewWidth,
   (2 * timelineRadius + timelineRadiusDistance) * (j - 1) + 2
    * timelineHeadRadius - timelineRadius + marginTop,
   timelineRadius, mPaint);
  /**
  * 　 畫其余的軸 left:每個軸距離左邊距離都是一樣的　　　時間軸的中心位置-1/2的時間軸的寬度 viewWidth -
  * timelineWidth / 2 top: (int) (j * (2 * timelineRadius +
  * timelineRadiusDistance) - timelineRadiusDistance + 2 *
  * (timelineHeadRadius-timelineRadius)+ marginTop)　
  * right:每個軸距離右邊距離都是一樣的　　　時間軸的中心位置+1/2的時間軸的寬度 viewWidth +
  * timelineWidth / 2 bottom: (int) (j * (2 * timelineRadius +
  * timelineRadiusDistance) + 2 *
  * (timelineHeadRadius-timelineRadius)+ marginTop)
  */

  canvas.drawRect(
   new Rect(
    viewWidth - timelineWidth / 2,
    (int) (j
     * (2 * timelineRadius + timelineRadiusDistance)
     - timelineRadiusDistance + 2
     * (timelineHeadRadius - timelineRadius) + marginTop),
    viewWidth + timelineWidth / 2,
    (int) (j
     * (2 * timelineRadius + timelineRadiusDistance)
     + 2 * (timelineHeadRadius - timelineRadius) + marginTop)),
   mPaint);
 }
 }

 public float getTimelineHeadRadius() {
 return timelineHeadRadius;
 }

 public void setTimelineHeadRadius(float timelineHeadRadius) {

 this.timelineHeadRadius = timelineHeadRadius;
 invalidate();
 }

 public int getTimelineHeadColor() {
 return timelineHeadColor;
 }

 public void setTimelineHeadColor(int timelineHeadColor) {

 this.timelineHeadColor = timelineHeadColor;
 invalidate();
 }

 public int getTimelineOtherColor() {
 return timelineOtherColor;
 }

 public void setTimelineOtherColor(int timelineOtherColor) {
 this.timelineOtherColor = timelineOtherColor;
 invalidate();
 }

 public int getTimelineCount() {
 return timelineCount;
 }

 public void setTimelineCount(int timelineCount) {
 this.timelineCount = timelineCount;
 invalidate();
 }

 public int getMarginTop() {
 return marginTop;
 }

 public void setMarginTop(int marginTop) {

 this.marginTop = marginTop;
 invalidate();
 }

 public int getTimelineRadius() {
 return timelineRadius;
 }

 public void setTimelineRadius(int timelineRadius) {

 this.timelineRadius = timelineRadius;
 invalidate();
 }

 public int getTimelineRadiusDistance() {
 return timelineRadiusDistance;
 }

 public void setTimelineRadiusDistance(int timelineRadiusDistance) {

 this.timelineRadiusDistance = timelineRadiusDistance;
 invalidate();
 }

 public int getTimelineWidth() {
 return timelineWidth;
 }

 public void setTimelineWidth(int timelineWidth) {
 this.timelineWidth = timelineWidth;
 }

 public float getTimeLineViewHeight() {
 this.timeLineViewHeight = getMarginTop() + getTimelineCount()
  * (2 * getTimelineRadius() + getTimelineRadiusDistance());
 return timeLineViewHeight;
 }

 public void setTimeLineViewHeight(float timeLineViewHeight) {
 this.timeLineViewHeight = timeLineViewHeight;
 invalidate();

 }

 public int getViewWidth() {
 return viewWidth;
 }

 public void setViewWidth(int viewWidth) {
 this.viewWidth = viewWidth;
 invalidate();
 }

 /**
 * 轉換dip為px
 */
 public static int convertDIP2PX(Context context, int dip) {
 float scale = context.getResources().getDisplayMetrics().density;
 return (int) (dip * scale + 0.5f * (dip >= 0 ? 1 : -1));
 }

}