Zabbix

<?php

/*

** Copyright (C) 2001-2025 Zabbix SIA

**

** This program is free software: you can redistribute it and/or modify it under the terms of

** the GNU Affero General Public License as published by the Free Software Foundation, version 3.

**

** This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;

** without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

** See the GNU Affero General Public License for more details.

**

** You should have received a copy of the GNU Affero General Public License along with this program.

** If not, see <https://www.gnu.org/licenses/>.

**/

​

​

abstract class CGraphDraw {

​

    protected $stime;

    protected $fullSizeX;

    protected $fullSizeY;

    protected $m_minY;

    protected $m_maxY;

    protected $data;

    protected $items;

    private $header;

    protected $from_time;

    protected $to_time;

    private $colors;

    protected $colorsrgb;

    protected $im;

    protected $period;

    protected $sizeX;

    protected $sizeY;

    protected $shiftXleft;

    protected $shiftXright;

    protected $num;

    protected $type;

    protected $drawLegend;

    protected $graphtheme;

    protected $shiftY;

​

    /**

     * Default top padding including header label height and vertical padding.

     */

    const DEFAULT_HEADER_PADDING_TOP = 36;

    /**

     * Default font size for header label text.

     */

    const DEFAULT_HEADER_LABEL_FONT_SIZE = 11;

    /**

     * Default value for top and bottom padding.

     */

    const DEFAULT_TOP_BOTTOM_PADDING = 12;

​

    /**

     * Header label visibility.

     */

    public $draw_header = true;

    /**

     * Use top and bottom padding for graph image.

     */

    public $with_vertical_padding = true;

​

    public function __construct($type = GRAPH_TYPE_NORMAL) {

        $this->stime = null;

        $this->fullSizeX = null;

        $this->fullSizeY = null;

        $this->m_minY = null;

        $this->m_maxY = null;

        $this->data = [];

        $this->items = [];

        $this->header = null;

        $this->from_time = null;

        $this->to_time = null;

        $this->colors = null;

        $this->colorsrgb = null;

        $this->im = null;

        $this->period = SEC_PER_HOUR;

        $this->sizeX = 900; // default graph size X

        $this->sizeY = 200; // default graph size Y

        $this->shiftXleft = 100;

        $this->shiftXright = 50;

        $this->num = 0;

        $this->type = $type; // graph type

        $this->drawLegend = 1;

        $this->graphtheme = getUserGraphTheme();

        $this->shiftY = 0;

    }

​

    /**