<?php

namespace PhpOffice\PhpSpreadsheet\Chart;

class TrendLine extends Properties
{
    const TRENDLINE_EXPONENTIAL = 'exp';
    const TRENDLINE_LINEAR = 'linear';
    const TRENDLINE_LOGARITHMIC = 'log';
    const TRENDLINE_POLYNOMIAL = 'poly'; // + 'order'
    const TRENDLINE_POWER = 'power';
    const TRENDLINE_MOVING_AVG = 'movingAvg'; // + 'period'
    const TRENDLINE_TYPES = [
        self::TRENDLINE_EXPONENTIAL,
        self::TRENDLINE_LINEAR,
        self::TRENDLINE_LOGARITHMIC,
        self::TRENDLINE_POLYNOMIAL,
        self::TRENDLINE_POWER,
        self::TRENDLINE_MOVING_AVG,
    ];

    /** @var string */
    private $trendLineType = 'linear'; // TRENDLINE_LINEAR

    /** @var int */
    private $order = 2;

    /** @var int */
    private $period = 3;

    /** @var bool */
    private $dispRSqr = false;

    /** @var bool */
    private $dispEq = false;

    /** @var string */
    private $name = '';

    /** @var float */
    private $backward = 0.0;

    /** @var float */
    private $forward = 0.0;

    /** @var float */
    private $intercept = 0.0;

    /**
     * Create a new TrendLine object.
     */
    public function __construct(
        string $trendLineType = '',
        ?int $order = null,
        ?int $period = null,
        bool $dispRSqr = false,
        bool $dispEq = false,
        ?float $backward = null,
        ?float $forward = null,
        ?float $intercept = null,
        ?string $name = null
    ) {
        parent::__construct();
        $this->setTrendLineProperties(
            $trendLineType,
            $order,
            $period,
            $dispRSqr,
            $dispEq,
            $backward,
            $forward,
            $intercept,
            $name
        );
    }

    public function getTrendLineType(): string
    {
        return $this->trendLineType;
    }

    public function setTrendLineType(string $trendLineType): self
    {
        $this->trendLineType = $trendLineType;

        return $this;
    }

    public function getOrder(): int
    {
        return $this->order;
    }

    public function setOrder(int $order): self
    {
        $this->order = $order;

        return $this;
    }

    public function getPeriod(): int
    {
        return $this->period;
    }

    public function setPeriod(int $period): self
    {
        $this->period = $period;

        return $this;
    }

    public function getDispRSqr(): bool
    {
        return $this->dispRSqr;
    }

    public function setDispRSqr(bool $dispRSqr): self
    {
        $this->dispRSqr = $dispRSqr;

        return $this;
    }

    public function getDispEq(): bool
    {
        return $this->dispEq;
    }

    public function setDispEq(bool $dispEq): self
    {
        $this->dispEq = $dispEq;

        return $this;
    }

    public function getName(): string
    {
        return $this->name;
    }

    public function setName(string $name): self
    {
        $this->name = $name;

        return $this;
    }

    public function getBackward(): float
    {
        return $this->backward;
    }

    public function setBackward(float $backward): self
    {
        $this->backward = $backward;

        return $this;
    }

    public function getForward(): float
    {
        return $this->forward;
    }

    public function setForward(float $forward): self
    {
        $this->forward = $forward;

        return $this;
    }

    public function getIntercept(): float
    {
        return $this->intercept;
    }

    public function setIntercept(float $intercept): self
    {
        $this->intercept = $intercept;

        return $this;
    }

    public function setTrendLineProperties(
        ?string $trendLineType = null,
        ?int $order = 0,
        ?int $period = 0,
        ?bool $dispRSqr = false,
        ?bool $dispEq = false,
        ?float $backward = null,
        ?float $forward = null,
        ?float $intercept = null,
        ?string $name = null
    ): self {
        if (!empty($trendLineType)) {
            $this->setTrendLineType($trendLineType);
        }
        if ($order !== null) {
            $this->setOrder($order);
        }
        if ($period !== null) {
            $this->setPeriod($period);
        }
        if ($dispRSqr !== null) {
            $this->setDispRSqr($dispRSqr);
        }
        if ($dispEq !== null) {
            $this->setDispEq($dispEq);
        }
        if ($backward !== null) {
            $this->setBackward($backward);
        }
        if ($forward !== null) {
            $this->setForward($forward);
        }
        if ($intercept !== null) {
            $this->setIntercept($intercept);
        }
        if ($name !== null) {
            $this->setName($name);
        }

        return $this;
    }
}

• [D] Renderer
• [F] Axis.php
  Delete
• [F] AxisText.php
  Delete
• [F] Chart.php
  Delete
• [F] ChartColor.php
  Delete
• [F] DataSeries.php
  Delete
• [F] DataSeriesValues.php
  Delete
• [F] Exception.php
  Delete
• [F] GridLines.php
  Delete
• [F] Layout.php
  Delete
• [F] Legend.php
  Delete
• [F] PlotArea.php
  Delete
• [F] Properties.php
  Delete
• [F] Title.php
  Delete
• [F] TrendLine.php
  Delete

Contact Section

Get in Touch with Us for Any Questions or Support

We’d love to hear from you! Whether you have questions, feedback, or need support, our team is here to help. Reach out to us via email, phone, or visit our office. We’re committed to providing you with exceptional service and ensuring your experience with NFC Pay is seamless and satisfying. Let’s connect!

Name*

Email*

Message*

Send Message

Our Location

20-22 Wenlock Road, England, N1 7GU

Call us on: +03601 885399

Our office hours Monday–Friday, 9am - 9pm

Email us directly

support@example.com