Android Open Source - Android-Charts M A C D Chart

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Java Source Code

/*
 * MACDChart.java//from   www  .  j a v  a  2s.c  o m
 * Android-Charts
 *
 * Created by limc on 2014.
 *
 * Copyright 2011 limc.cn All rights reserved.
 *
 * 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 cn.limc.androidcharts.view;

import cn.limc.androidcharts.entity.IMeasurable;
import cn.limc.androidcharts.entity.MACDEntity;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.PointF;
import android.util.AttributeSet;

/**
 * <p>
 * en
 * </p>
 * <p>
 * jp
 * </p>
 * <p>
 * cn
 * </p>
 * 
 * @author limc
 * @version v1.0 2014/03/17 17:19:45
 * 
 */
public class MACDChart extends SlipStickChart {

  public static final int MACD_DISPLAY_TYPE_STICK = 1 << 0;
  public static final int MACD_DISPLAY_TYPE_LINE = 1 << 1;
  public static final int MACD_DISPLAY_TYPE_LINE_STICK = 1 << 2;

  public static final int DEFAULT_POSITIVE_STICK_COLOR = Color.RED;
  public static final int DEFAULT_NEGATIVE_STICK_COLOR = Color.BLUE;
  public static final int DEFAULT_MACD_LINE_COLOR = Color.RED;
  public static final int DEFAULT_DIFF_LINE_COLOR = Color.WHITE;
  public static final int DEFAULT_DEA_LINE_COLOR = Color.YELLOW;
  public static final int DEFAULT_MACD_DISPLAY_TYPE = MACD_DISPLAY_TYPE_LINE_STICK;

  private int positiveStickColor = DEFAULT_POSITIVE_STICK_COLOR;
  private int negativeStickColor = DEFAULT_NEGATIVE_STICK_COLOR;
  private int macdLineColor = DEFAULT_MACD_LINE_COLOR;
  private int diffLineColor = DEFAULT_DIFF_LINE_COLOR;
  private int deaLineColor = DEFAULT_DEA_LINE_COLOR;
  private int macdDisplayType = DEFAULT_MACD_DISPLAY_TYPE;

  /**
   * <p>
   * Constructor of MACDChart
   * </p>
   * <p>
   * MACDChart????????
   * </p>
   * <p>
   * MACDChart???????????
   * </p>
   * 
   * @param context
   */
  public MACDChart(Context context) {
    super(context);
    // TODO Auto-generated constructor stub
  }

  /**
   * <p>
   * Constructor of MACDChart
   * </p>
   * <p>
   * MACDChart????????
   * </p>
   * <p>
   * MACDChart???????????
   * </p>
   * 
   * @param context
   * @param attrs
   * @param defStyle
   */
  public MACDChart(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
  }

  /**
   * <p>
   * Constructor of MACDChart
   * </p>
   * <p>
   * MACDChart????????
   * </p>
   * <p>
   * MACDChart???????????
   * </p>
   * 
   * @param context
   * @param attrs
   */
  public MACDChart(Context context, AttributeSet attrs) {
    super(context, attrs);
  }

  @Override
  protected void calcValueRange() {
    if (stickData == null) {
      return;
    }
    if (stickData.size() <= 0) {
      return;
    }
    double maxValue = Double.MIN_VALUE;
    double minValue = Double.MAX_VALUE;

    IMeasurable first = stickData.get(displayFrom);
    maxValue = Math.max(first.getHigh(), maxValue);
    minValue = Math.min(first.getLow(), minValue);
    // ???????????????
    for (int i = displayFrom; i < displayFrom + displayNumber; i++) {
      IMeasurable macd = stickData.get(i);
      maxValue = Math.max(macd.getHigh(), maxValue);
      minValue = Math.min(macd.getLow(), minValue);
    }
    this.maxValue = maxValue;
    this.minValue = minValue;
  }

  @Override
  protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);

    // ?K?????????
    drawLinesData(canvas);
  }

  @Override
  protected void drawSticks(Canvas canvas) {

    if (stickData == null) {
      return;
    }
    if (stickData.size() <= 0) {
      return;
    }

    if (macdDisplayType == MACD_DISPLAY_TYPE_LINE) {
      this.drawMacdLine(canvas);
      return;
    }

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

    float stickWidth = dataQuadrant.getQuadrantPaddingWidth() / displayNumber
        - stickSpacing;
    float stickX = dataQuadrant.getQuadrantPaddingStartX();

    // ???????????????
    for (int i = displayFrom; i < displayFrom + displayNumber; i++) {
      MACDEntity stick = (MACDEntity) stickData.get(i);

      float highY;
      float lowY;
      if (stick.getMacd() == 0) {
        // ???????????
        continue;
      }
      // ???????
      if (stick.getMacd() > 0) {
        mPaintStick.setColor(positiveStickColor);
        highY = (float) ((1 - (stick.getMacd() - minValue)
            / (maxValue - minValue))
            * (dataQuadrant.getQuadrantPaddingHeight()) + dataQuadrant.getQuadrantPaddingStartY());
        lowY = (float) ((1 - (0 - minValue) / (maxValue - minValue))
            * (dataQuadrant.getQuadrantPaddingHeight()) + dataQuadrant.getQuadrantPaddingStartY());

      } else {
        mPaintStick.setColor(negativeStickColor);
        highY = (float) ((1 - (0 - minValue) / (maxValue - minValue))
            * (dataQuadrant.getQuadrantPaddingHeight()) + dataQuadrant.getQuadrantPaddingStartY());

        lowY = (float) ((1 - (stick.getMacd() - minValue)
            / (maxValue - minValue))
            * (dataQuadrant.getQuadrantPaddingHeight()) + dataQuadrant.getQuadrantPaddingStartY());

      }

      if (macdDisplayType == MACD_DISPLAY_TYPE_STICK) {
        // ??????????????????????
        if (stickWidth >= 2) {
          canvas.drawRect(stickX, highY, stickX + stickWidth, lowY,
              mPaintStick);
        } else {
          canvas.drawLine(stickX, highY, stickX, lowY, mPaintStick);
        }
      } else if (macdDisplayType == MACD_DISPLAY_TYPE_LINE_STICK) {
        canvas.drawLine(stickX + stickWidth / 2, highY, stickX
            + stickWidth / 2, lowY, mPaintStick);
      }

      // X???
      stickX = stickX + stickSpacing + stickWidth;
    }
  }

  protected void drawDiffLine(Canvas canvas) {

    if (null == this.stickData) {
      return;
    }
    Paint mPaintStick = new Paint();
    mPaintStick.setAntiAlias(true);
    mPaintStick.setColor(diffLineColor);

    // distance between two points
    float lineLength = dataQuadrant.getQuadrantPaddingWidth() / displayNumber - stickSpacing;
    // start points X
    float startX = dataQuadrant.getQuadrantPaddingStartX() + lineLength / 2;
    // start point
    PointF ptFirst = null;
    for (int i = displayFrom; i < displayFrom + displayNumber; i++) {
      MACDEntity entity = (MACDEntity) stickData.get(i);
      // calculate Y
      float valueY = (float) ((1f - (entity.getDiff() - minValue)
          / (maxValue - minValue)) * dataQuadrant.getQuadrantPaddingHeight())
          + dataQuadrant.getQuadrantPaddingStartY();

      // if is not last point connect to previous point
      if (i > displayFrom) {
        canvas.drawLine(ptFirst.x, ptFirst.y, startX, valueY,
            mPaintStick);
      }
      // reset
      ptFirst = new PointF(startX, valueY);
      startX = startX + stickSpacing + lineLength;
    }
  }

  protected void drawDeaLine(Canvas canvas) {

    Paint mPaintStick = new Paint();
    mPaintStick.setAntiAlias(true);
    mPaintStick.setColor(deaLineColor);
    // distance between two points
    float lineLength = dataQuadrant.getQuadrantPaddingWidth() / displayNumber - stickSpacing;
    // set start points X
    float startX = dataQuadrant.getQuadrantPaddingStartX() + lineLength / 2;
    // start point
    PointF ptFirst = null;
    for (int i = displayFrom; i < displayFrom + displayNumber; i++) {
      MACDEntity entity = (MACDEntity) stickData.get(i);
      // calculate Y
      float valueY = (float) ((1f - (entity.getDea() - minValue)
          / (maxValue - minValue)) * dataQuadrant.getQuadrantPaddingHeight())
          + dataQuadrant.getQuadrantPaddingStartY();

      // if is not last point connect to previous point
      if (i > displayFrom) {
        canvas.drawLine(ptFirst.x, ptFirst.y, startX, valueY,
            mPaintStick);
      }
      // reset
      ptFirst = new PointF(startX, valueY);
      startX = startX + stickSpacing + lineLength;
    }
  }

  protected void drawMacdLine(Canvas canvas) {
    Paint mPaintStick = new Paint();
    mPaintStick.setAntiAlias(true);
    mPaintStick.setColor(macdLineColor);

    // distance between two points
    float lineLength = dataQuadrant.getQuadrantPaddingWidth() / displayNumber - stickSpacing;
    // set start points X
    float startX = dataQuadrant.getQuadrantPaddingStartX() + lineLength / 2;
    // start point
    PointF ptFirst = null;
    for (int i = displayFrom; i < displayFrom + displayNumber; i++) {
      MACDEntity entity = (MACDEntity) stickData.get(i);
      // calculate Y
      float valueY = (float) ((1f - (entity.getMacd() - minValue)
          / (maxValue - minValue)) * dataQuadrant.getQuadrantPaddingHeight())
          + dataQuadrant.getQuadrantPaddingStartY();

      // if is not last point connect to previous point
      if (i > displayFrom) {
        canvas.drawLine(ptFirst.x, ptFirst.y, startX, valueY,
            mPaintStick);
      }
      // reset
      ptFirst = new PointF(startX, valueY);
      startX = startX + stickSpacing + lineLength;
    }
  }

  protected void drawLinesData(Canvas canvas) {

    if (stickData == null) {
      return;
    }
    if (stickData.size() <= 0) {
      return;
    }

    drawDeaLine(canvas);
    drawDiffLine(canvas);
  }

  /**
   * @return the positiveStickColor
   */
  public int getPositiveStickColor() {
    return positiveStickColor;
  }

  /**
   * @param positiveStickColor
   *            the positiveStickColor to set
   */
  public void setPositiveStickColor(int positiveStickColor) {
    this.positiveStickColor = positiveStickColor;
  }

  /**
   * @return the negativeStickColor
   */
  public int getNegativeStickColor() {
    return negativeStickColor;
  }

  /**
   * @param negativeStickColor
   *            the negativeStickColor to set
   */
  public void setNegativeStickColor(int negativeStickColor) {
    this.negativeStickColor = negativeStickColor;
  }

  /**
   * @return the macdLineColor
   */
  public int getMacdLineColor() {
    return macdLineColor;
  }

  /**
   * @param macdLineColor
   *            the macdLineColor to set
   */
  public void setMacdLineColor(int macdLineColor) {
    this.macdLineColor = macdLineColor;
  }

  /**
   * @return the diffLineColor
   */
  public int getDiffLineColor() {
    return diffLineColor;
  }

  /**
   * @param diffLineColor
   *            the diffLineColor to set
   */
  public void setDiffLineColor(int diffLineColor) {
    this.diffLineColor = diffLineColor;
  }

  /**
   * @return the deaLineColor
   */
  public int getDeaLineColor() {
    return deaLineColor;
  }

  /**
   * @param deaLineColor
   *            the deaLineColor to set
   */
  public void setDeaLineColor(int deaLineColor) {
    this.deaLineColor = deaLineColor;
  }

  /**
   * @return the macdDisplayType
   */
  public int getMacdDisplayType() {
    return macdDisplayType;
  }

  /**
   * @param macdDisplayType
   *            the macdDisplayType to set
   */
  public void setMacdDisplayType(int macdDisplayType) {
    this.macdDisplayType = macdDisplayType;
  }

}
Java Source Code List
