WebSVN – Moodle – /blocks/configurable_reports/lib/pChart2/class/pSurface.class.php

<?php
/*
pSurface - class to draw surface charts

Version     : 2.1.4
Made by     : Jean-Damien POGOLOTTI
Last Update : 19/01/2014

This file can be distributed under the license you can find at :

http://www.pchart.net/license

You can find the whole class documentation on the pChart web site.
*/
define("UNKNOWN", 0.123456789);
define("IGNORED", -1);
define("LABEL_POSITION_LEFT", 880001);
define("LABEL_POSITION_RIGHT", 880002);
define("LABEL_POSITION_TOP", 880003);
define("LABEL_POSITION_BOTTOM", 880004);

/* pStock class definition */
class pSurface
{
        var $pChartObject;
        var $GridSizeX;
        var $GridSizeY;
        var $Points = [];
        /* Class creator */
        function __construct($pChartObject)
        {
                $this->pChartObject = $pChartObject;
                #$this->GridSize = 10; # UNUSED
        }

        /* Define the grid size and initialise the 2D matrix */
        function setGrid($XSize = 10, $YSize = 10)
        {
                for ($X = 0; $X <= $XSize; $X++) {
                        for ($Y = 0; $Y <= $YSize; $Y++) {
                                $this->Points[$X][$Y] = UNKNOWN;
                        }
                }

                $this->GridSizeX = $XSize;
                $this->GridSizeY = $YSize;
        }

        /* Add a point on the grid */
        function addPoint($X, $Y, $Value, $Force = TRUE)
        {
                if ($X < 0 || $X > $this->GridSizeX) {
                        return 0;
                }

                if ($Y < 0 || $Y > $this->GridSizeY) {
                        return 0;
                }

                if ($this->Points[$X][$Y] == UNKNOWN || $Force) {
                        $this->Points[$X][$Y] = $Value;
                } elseif ($this->Points[$X][$Y] == UNKNOWN) {
                        $this->Points[$X][$Y] = $Value;
                } else {
                        $this->Points[$X][$Y] = ($this->Points[$X][$Y] + $Value) / 2;
                }
        }

        /* Write the X labels */
        function writeXLabels(array $Format = [])
        {
                $R = $this->pChartObject->FontColorR;
                $G = $this->pChartObject->FontColorG;
                $B = $this->pChartObject->FontColorB;
                $Alpha = $this->pChartObject->FontColorA;
                $Angle = 0;
                $Padding = 5;
                $Position = LABEL_POSITION_TOP;
                $Labels = NULL;
                $CountOffset = 0;
                
                /* Override defaults */
                extract($Format);
                
                if ($Labels != NULL && !is_array($Labels)) {
                        $Labels = [$Labels];
                }

                $X0 = $this->pChartObject->GraphAreaX1;
                $XSize = ($this->pChartObject->GraphAreaX2 - $this->pChartObject->GraphAreaX1) / ($this->GridSizeX + 1);
                $Settings = ["Angle" => $Angle,"R" => $R,"G" => $G,"B" => $B,"Alpha" => $Alpha];
                if ($Position == LABEL_POSITION_TOP) {
                        $YPos = $this->pChartObject->GraphAreaY1 - $Padding;
                        $Settings["Align"] = ($Angle == 0) ? TEXT_ALIGN_BOTTOMMIDDLE : TEXT_ALIGN_MIDDLELEFT;
                        
                } elseif ($Position == LABEL_POSITION_BOTTOM) {
                        $YPos = $this->pChartObject->GraphAreaY2 + $Padding;
                        $Settings["Align"] = ($Angle == 0) ? TEXT_ALIGN_TOPMIDDLE : TEXT_ALIGN_MIDDLERIGHT;
                        
                } else {
                        return -1;
                }

                for ($X = 0; $X <= $this->GridSizeX; $X++) {
                        $XPos = floor($X0 + $X * $XSize + $XSize / 2);
                        $Value = ($Labels == NULL || !isset($Labels[$X])) ? $X + $CountOffset : $Labels[$X];
                        $this->pChartObject->drawText($XPos, $YPos, $Value, $Settings);
                }
        }

        /* Write the Y labels */
        function writeYLabels(array $Format = [])
        {
                $R = $this->pChartObject->FontColorR;
                $G = $this->pChartObject->FontColorG;
                $B = $this->pChartObject->FontColorB;
                $Alpha = $this->pChartObject->FontColorA;
                $Angle = 0;
                $Padding = 5;
                $Position = LABEL_POSITION_LEFT;
                $Labels = NULL;
                $CountOffset = 0;
                
                /* Override defaults */
                extract($Format);
                
                if ($Labels != NULL && !is_array($Labels)) {
                        $Labels = [$Labels];
                }

                $Y0 = $this->pChartObject->GraphAreaY1;
                $YSize = ($this->pChartObject->GraphAreaY2 - $this->pChartObject->GraphAreaY1) / ($this->GridSizeY + 1);
                $Settings = ["Angle" => $Angle,"R" => $R,"G" => $G,"B" => $B,"Alpha" => $Alpha];
                
                if ($Position == LABEL_POSITION_LEFT) {
                        $XPos = $this->pChartObject->GraphAreaX1 - $Padding;
                        $Settings["Align"] = TEXT_ALIGN_MIDDLERIGHT;
                } elseif ($Position == LABEL_POSITION_RIGHT) {
                        $XPos = $this->pChartObject->GraphAreaX2 + $Padding;
                        $Settings["Align"] = TEXT_ALIGN_MIDDLELEFT;
                } else {
                        return -1;
                }

                for ($Y = 0; $Y <= $this->GridSizeY; $Y++) {
                        $YPos = floor($Y0 + $Y * $YSize + $YSize / 2);
                        $Value = ($Labels == NULL || !isset($Labels[$Y])) ? $Y + $CountOffset : $Labels[$Y];
                        $this->pChartObject->drawText($XPos, $YPos, $Value, $Settings);
                }
        }

        /* Draw the area arround the specified Threshold */
        function drawContour($Threshold, array $Format = [])
        {
                $R = 0;
                $G = 0;
                $B = 0;
                $Alpha = 100;
                $Ticks = 3;
                $Padding = 0;
                
                /* Override defaults */
                extract($Format);
                
                $X0 = $this->pChartObject->GraphAreaX1;
                $Y0 = $this->pChartObject->GraphAreaY1;
                $XSize = ($this->pChartObject->GraphAreaX2 - $this->pChartObject->GraphAreaX1) / ($this->GridSizeX + 1);
                $YSize = ($this->pChartObject->GraphAreaY2 - $this->pChartObject->GraphAreaY1) / ($this->GridSizeY + 1);
                $Color = ["R" => $R,"G" => $G,"B" => $B,"Alpha" => $Alpha,"Ticks" => $Ticks];
                for ($X = 0; $X <= $this->GridSizeX; $X++) {
                        for ($Y = 0; $Y <= $this->GridSizeY; $Y++) {
                                $Value = $this->Points[$X][$Y];
                                if ($Value != UNKNOWN && $Value != IGNORED && $Value >= $Threshold) {
                                        $X1 = floor($X0 + $X * $XSize) + $Padding;
                                        $Y1 = floor($Y0 + $Y * $YSize) + $Padding;
                                        $X2 = floor($X0 + $X * $XSize + $XSize);
                                        $Y2 = floor($Y0 + $Y * $YSize + $YSize);
                                        if ($X > 0 && $this->Points[$X - 1][$Y] != UNKNOWN && $this->Points[$X - 1][$Y] != IGNORED && $this->Points[$X - 1][$Y] < $Threshold){
                                                $this->pChartObject->drawLine($X1, $Y1, $X1, $Y2, $Color);
                                        }
                                        if ($Y > 0 && $this->Points[$X][$Y - 1] != UNKNOWN && $this->Points[$X][$Y - 1] != IGNORED && $this->Points[$X][$Y - 1] < $Threshold){
                                                $this->pChartObject->drawLine($X1, $Y1, $X2, $Y1, $Color);
                                        }
                                        if ($X < $this->GridSizeX && $this->Points[$X + 1][$Y] != UNKNOWN && $this->Points[$X + 1][$Y] != IGNORED && $this->Points[$X + 1][$Y] < $Threshold){
                                                $this->pChartObject->drawLine($X2, $Y1, $X2, $Y2, $Color);
                                        }
                                        if ($Y < $this->GridSizeY && $this->Points[$X][$Y + 1] != UNKNOWN && $this->Points[$X][$Y + 1] != IGNORED && $this->Points[$X][$Y + 1] < $Threshold){
                                                $this->pChartObject->drawLine($X1, $Y2, $X2, $Y2, $Color);
                                        }
                                }
                        }
                }
        }

        /* Draw the surface chart */
        function drawSurface(array $Format = [])
        {
                $Palette = NULL;
                $ShadeR1 = 77;
                $ShadeG1 = 205;
                $ShadeB1 = 21;
                $ShadeA1 = 40;
                $ShadeR2 = 227;
                $ShadeG2 = 135;
                $ShadeB2 = 61;
                $ShadeA2 = 100;
                $Border = FALSE;
                $BorderR = 0;
                $BorderG = 0;
                $BorderB = 0;
                $Surrounding = -1;
                $Padding = 1;
                
                /* Override defaults */
                extract($Format);
                
                $X0 = $this->pChartObject->GraphAreaX1;
                $Y0 = $this->pChartObject->GraphAreaY1;
                $XSize = ($this->pChartObject->GraphAreaX2 - $this->pChartObject->GraphAreaX1) / ($this->GridSizeX + 1);
                $YSize = ($this->pChartObject->GraphAreaY2 - $this->pChartObject->GraphAreaY1) / ($this->GridSizeY + 1);
                for ($X = 0; $X <= $this->GridSizeX; $X++) {
                        for ($Y = 0; $Y <= $this->GridSizeY; $Y++) {
                                $Value = $this->Points[$X][$Y];
                                if ($Value != UNKNOWN && $Value != IGNORED) {
                                        
                                        $X1 = floor($X0 + $X * $XSize) + $Padding;
                                        $Y1 = floor($Y0 + $Y * $YSize) + $Padding;
                                        $X2 = floor($X0 + $X * $XSize + $XSize);
                                        $Y2 = floor($Y0 + $Y * $YSize + $YSize);
                                        
                                        if ($Palette != NULL) {
                                                $R = (isset($Palette[$Value]) && isset($Palette[$Value]["R"])) ? $Palette[$Value]["R"] : 0;
                                                $G = (isset($Palette[$Value]) && isset($Palette[$Value]["G"])) ? $Palette[$Value]["G"] : 0;
                                                $B = (isset($Palette[$Value]) && isset($Palette[$Value]["B"])) ? $Palette[$Value]["B"] : 0;
                                                $Alpha = (isset($Palette[$Value]) && isset($Palette[$Value]["Alpha"])) ? $Palette[$Value]["Alpha"] : 1000;
                                                
                                        } else {
                                                $R = (($ShadeR2 - $ShadeR1) / 100) * $Value + $ShadeR1;
                                                $G = (($ShadeG2 - $ShadeG1) / 100) * $Value + $ShadeG1;
                                                $B = (($ShadeB2 - $ShadeB1) / 100) * $Value + $ShadeB1;
                                                $Alpha = (($ShadeA2 - $ShadeA1) / 100) * $Value + $ShadeA1;
                                        }

                                        $Settings = ["R" => $R,"G" => $G,"B" => $B,"Alpha" => $Alpha];
                                        
                                        if ($Border) {
                                                $Settings["BorderR"] = $BorderR;
                                                $Settings["BorderG"] = $BorderG;
                                                $Settings["BorderB"] = $BorderB;
                                        }

                                        if ($Surrounding != - 1) {
                                                $Settings["BorderR"] = $R + $Surrounding;
                                                $Settings["BorderG"] = $G + $Surrounding;
                                                $Settings["BorderB"] = $B + $Surrounding;
                                        }

                                        $this->pChartObject->drawFilledRectangle($X1, $Y1, $X2 - 1, $Y2 - 1, $Settings);
                                }
                        }
                }
        }

        /* Compute the missing points */
        function computeMissing()
        {
                $Missing = [];
                for ($X = 0; $X <= $this->GridSizeX; $X++) {
                        for ($Y = 0; $Y <= $this->GridSizeY; $Y++) {
                                if ($this->Points[$X][$Y] == UNKNOWN) {
                                        $Missing[] = [$X, $Y];
                                }
                        }
                }

                shuffle($Missing);
                foreach($Missing as $Pos) {
                        $X = $Pos[0];
                        $Y = $Pos[1];
                        if ($this->Points[$X][$Y] == UNKNOWN) {
                                $NearestNeighbor = $this->getNearestNeighbor($X, $Y);
                                $Value = 0;
                                $Points = 0;
                                for ($Xi = $X - $NearestNeighbor; $Xi <= $X + $NearestNeighbor; $Xi++) {
                                        for ($Yi = $Y - $NearestNeighbor; $Yi <= $Y + $NearestNeighbor; $Yi++) {
                                                if ($Xi >= 0 && $Yi >= 0 && $Xi <= $this->GridSizeX && $Yi <= $this->GridSizeY && $this->Points[$Xi][$Yi] != UNKNOWN && $this->Points[$Xi][$Yi] != IGNORED) {
                                                        $Value = $Value + $this->Points[$Xi][$Yi];
                                                        $Points++;
                                                }
                                        }
                                }

                                if ($Points != 0) {
                                        $this->Points[$X][$Y] = $Value / $Points;
                                }
                        }
                }
        }

        /* Return the nearest Neighbor distance of a point */
        function getNearestNeighbor($Xp, $Yp)
        {
                $Nearest = UNKNOWN;
                for ($X = 0; $X <= $this->GridSizeX; $X++) {
                        for ($Y = 0; $Y <= $this->GridSizeY; $Y++) {
                                if ($this->Points[$X][$Y] != UNKNOWN && $this->Points[$X][$Y] != IGNORED) {
                                        $DistanceX = max($Xp, $X) - min($Xp, $X);
                                        $DistanceY = max($Yp, $Y) - min($Yp, $Y);
                                        $Distance = max($DistanceX, $DistanceY);
                                        if ($Distance < $Nearest || $Nearest == UNKNOWN) {
                                                $Nearest = $Distance;
                                        }
                                }
                        }
                }

                return $Nearest;
        }
}

?>
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