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443 lines
14 KiB
PHP
443 lines
14 KiB
PHP
<?php
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/* Libchart - PHP chart library
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* Copyright (C) 2005-2011 Jean-Marc Trémeaux (jm.tremeaux at gmail.com)
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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/**
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* The plot holds graphical attributes, and is responsible for computing the layout of the graph.
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* The layout is quite simple right now, with 4 areas laid out like that:
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* (of course this is subject to change in the future).
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*
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* output area------------------------------------------------|
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* | (outer padding) |
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* | image area--------------------------------------------| |
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* | | (title padding) | |
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* | | title area----------------------------------------| | |
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* | | |-------------------------------------------------| | |
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* | | | |
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* | | (graph padding) (caption padding) | |
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* | | graph area----------------| caption area---------| | |
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* | | | | | | | |
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* | | | | | | | |
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* | | | | | | | |
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* | | | | | | | |
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* | | | | | | | |
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* | | |-------------------------| |--------------------| | |
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* | | | |
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* | |-----------------------------------------------------| |
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* | |
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* |----------------------------------------------------------|
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*
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* All area dimensions are known in advance , and the optional logo is drawn in absolute coordinates.
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*
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* @author Jean-Marc Trémeaux (jm.tremeaux at gmail.com)
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* Created on 27 july 2007
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*/
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class Plot {
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// Style properties
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protected $title;
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/**
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* Location of the logo. Can be overriden to your personalized logo.
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*/
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protected $logoFileName;
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/**
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* Outer area, whose dimension is the same as the PNG returned.
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*/
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protected $outputArea;
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/**
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* Outer padding surrounding the whole image, everything outside is blank.
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*/
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protected $outerPadding;
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/**
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* Coordinates of the area inside the outer padding.
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*/
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protected $imageArea;
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/**
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* Fixed title height in pixels.
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*/
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protected $titleHeight;
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/**
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* Padding of the title area.
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*/
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protected $titlePadding;
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/**
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* Coordinates of the title area.
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*/
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protected $titleArea;
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/**
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* True if the plot has a caption.
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*/
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protected $hasCaption;
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/**
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* Ratio of graph/caption in width.
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*/
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protected $graphCaptionRatio;
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/**
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* Padding of the graph area.
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*/
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protected $graphPadding;
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/**
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* Coordinates of the graph area.
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*/
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protected $graphArea;
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/**
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* Padding of the caption area.
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*/
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protected $captionPadding;
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/**
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* Coordinates of the caption area.
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*/
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protected $captionArea;
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/**
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* Text writer.
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*/
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protected $text;
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/**
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* Color palette.
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*/
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protected $palette;
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/**
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* GD image
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*/
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protected $img;
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/**
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* Drawing primitives
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*/
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protected $primitive;
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protected $backGroundColor;
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protected $textColor;
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/**
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* Constructor of Plot.
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*
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* @param integer width of the image
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* @param integer height of the image
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*/
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public function Plot($width, $height) {
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$this->width = $width;
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$this->height = $height;
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$this->text = new Text();
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$this->palette = new Palette();
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// Default layout
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$this->outputArea = new Rectangle(0, 0, $width - 1, $height - 1);
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$this->outerPadding = new Padding(5);
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$this->titleHeight = 26;
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$this->titlePadding = new Padding(5);
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$this->hasCaption = false;
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$this->graphCaptionRatio = 0.50;
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$this->graphPadding = new Padding(50);
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$this->captionPadding = new Padding(15);
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}
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/**
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* Compute the area inside the outer padding (outside is white).
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*/
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private function computeImageArea() {
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$this->imageArea = $this->outputArea->getPaddedRectangle($this->outerPadding);
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}
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/**
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* Compute the title area.
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*/
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private function computeTitleArea() {
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$titleUnpaddedBottom = $this->imageArea->y1 + $this->titleHeight + $this->titlePadding->top + $this->titlePadding->bottom;
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$titleArea = new Rectangle(
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$this->imageArea->x1,
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$this->imageArea->y1,
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$this->imageArea->x2,
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$titleUnpaddedBottom - 1
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);
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$this->titleArea = $titleArea->getPaddedRectangle($this->titlePadding);
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}
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/**
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* Compute the graph area.
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*/
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private function computeGraphArea() {
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$titleUnpaddedBottom = $this->imageArea->y1 + $this->titleHeight + $this->titlePadding->top + $this->titlePadding->bottom;
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$graphArea = null;
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if ($this->hasCaption) {
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$graphUnpaddedRight = $this->imageArea->x1 + ($this->imageArea->x2 - $this->imageArea->x1) * $this->graphCaptionRatio
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+ $this->graphPadding->left + $this->graphPadding->right;
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$graphArea = new Rectangle(
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$this->imageArea->x1,
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$titleUnpaddedBottom,
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$graphUnpaddedRight - 1,
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$this->imageArea->y2
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);
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} else {
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$graphArea = new Rectangle(
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$this->imageArea->x1,
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$titleUnpaddedBottom,
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$this->imageArea->x2,
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$this->imageArea->y2
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);
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}
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$this->graphArea = $graphArea->getPaddedRectangle($this->graphPadding);
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}
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/**
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* Compute the caption area.
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*/
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private function computeCaptionArea() {
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$graphUnpaddedRight = $this->imageArea->x1 + ($this->imageArea->x2 - $this->imageArea->x1) * $this->graphCaptionRatio
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+ $this->graphPadding->left + $this->graphPadding->right;
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$titleUnpaddedBottom = $this->imageArea->y1 + $this->titleHeight + $this->titlePadding->top + $this->titlePadding->bottom;
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$captionArea = new Rectangle(
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$graphUnpaddedRight,
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$titleUnpaddedBottom,
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$this->imageArea->x2,
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$this->imageArea->y2
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);
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$this->captionArea = $captionArea->getPaddedRectangle($this->captionPadding);
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}
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/**
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* Compute the layout of all areas of the graph.
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*/
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public function computeLayout() {
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$this->computeImageArea();
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$this->computeTitleArea();
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$this->computeGraphArea();
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if ($this->hasCaption) {
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$this->computeCaptionArea();
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}
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}
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/**
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* Creates and initialize the image.
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*/
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public function createImage() {
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$this->img = imagecreatetruecolor($this->width, $this->height);
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$this->primitive = new Primitive($this->img);
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$this->backGroundColor = new Color(255, 255, 255);
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$this->textColor = new Color(0, 0, 0);
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// White background
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imagefilledrectangle($this->img, 0, 0, $this->width - 1, $this->height - 1, $this->backGroundColor->getColor($this->img));
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//imagerectangle($this->img, $this->imageArea->x1, $this->imageArea->y1, $this->imageArea->x2, $this->imageArea->y2, $this->palette->red->getColor($this->img));
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}
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/**
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* Print the title to the image.
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*/
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public function printTitle() {
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$yCenter = $this->titleArea->y1 + ($this->titleArea->y2 - $this->titleArea->y1) / 2;
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$this->text->printCentered($this->img, $yCenter, $this->textColor, $this->title, $this->text->fontCondensedBold);
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}
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/**
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* Print the logo image to the image.
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*/
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public function printLogo() {
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@$logoImage = imageCreateFromPNG($this->logoFileName);
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if ($logoImage) {
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imagecopymerge($this->img, $logoImage, 2 * $this->outerPadding->left, $this->outerPadding->top, 0, 0, imagesx($logoImage), imagesy($logoImage), 100);
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}
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}
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/**
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* Renders to a file or to standard output.
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*
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* @param fileName File name (optional)
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*/
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public function render($fileName) {
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if (isset($fileName)) {
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imagepng($this->img, $fileName);
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} else {
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imagepng($this->img);
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}
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}
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/**
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* Sets the title.
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*
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* @param string New title
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*/
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public function setTitle($title) {
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$this->title = $title;
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}
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/**
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* Sets the logo image file name.
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*
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* @param string New logo image file name
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*/
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public function setLogoFileName($logoFileName) {
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$this->logoFileName = $logoFileName;
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}
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/**
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* Return the GD image.
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*
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* @return GD Image
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*/
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public function getImg() {
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return $this->img;
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}
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/**
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* Return the palette.
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*
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* @return palette
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*/
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public function getPalette() {
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return $this->palette;
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}
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/**
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* Return the text.
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*
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* @return text
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*/
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public function getText() {
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return $this->text;
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}
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/**
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* Return the primitive.
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*
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* @return primitive
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*/
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public function getPrimitive() {
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return $this->primitive;
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}
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/**
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* Return the outer padding.
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*
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* @param integer Outer padding value in pixels
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*/
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public function getOuterPadding() {
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return $outerPadding;
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}
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/**
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* Set the outer padding.
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*
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* @param integer Outer padding value in pixels
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*/
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public function setOuterPadding($outerPadding) {
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$this->outerPadding = $outerPadding;
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}
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/**
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* Return the title height.
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*
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* @param integer title height
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*/
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public function setTitleHeight($titleHeight) {
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$this->titleHeight = $titleHeight;
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}
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/**
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* Return the title padding.
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*
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* @param integer title padding
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*/
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public function setTitlePadding($titlePadding) {
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$this->titlePadding = $titlePadding;
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}
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/**
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* Return the graph padding.
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*
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* @param integer graph padding
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*/
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public function setGraphPadding($graphPadding) {
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$this->graphPadding = $graphPadding;
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}
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/**
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* Set if the graph has a caption.
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*
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* @param boolean graph has a caption
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*/
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public function setHasCaption($hasCaption) {
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$this->hasCaption = $hasCaption;
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}
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/**
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* Set the caption padding.
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*
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* @param integer caption padding
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*/
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public function setCaptionPadding($captionPadding) {
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$this->captionPadding = $captionPadding;
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}
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/**
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* Set the graph/caption ratio.
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*
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* @param integer caption padding
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*/
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public function setGraphCaptionRatio($graphCaptionRatio) {
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$this->graphCaptionRatio = $graphCaptionRatio;
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}
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/**
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* Return the graph area.
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*
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* @return graph area
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*/
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public function getGraphArea() {
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return $this->graphArea;
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}
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/**
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* Return the caption area.
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*
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* @return caption area
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*/
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public function getCaptionArea() {
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return $this->captionArea;
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}
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/**
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* Return the text color.
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*
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* @return text color
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*/
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public function getTextColor() {
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return $this->textColor;
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}
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}
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?>
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