935 lines
26 KiB
JavaScript
935 lines
26 KiB
JavaScript
'version:2025-06-24 (6.22)';
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//
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// o---------------------------------------------------------------------------------o
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// | This file is part of the RGraph package - you can learn more at: |
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// | |
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// | https://www.rgraph.net/license.html |
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// | |
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// | RGraph is dual-licensed under the Open Source GPL license. That means that it's |
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// | free to use and there are no restrictions on what you can use RGraph for! |
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// | If the GPL license does not suit you however, then there's an inexpensive |
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// | commercial license option available. See the URL above for more details. |
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// o---------------------------------------------------------------------------------o
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//
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// Having this here means that the RGraph libraries can be included in any order, instead of you having
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// to include the common core library first.
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//
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// Define the RGraph global variable
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RGraph = window.RGraph || {isrgraph:true,isRGraph: true,rgraph:true};
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RGraph.Drawing = RGraph.Drawing || {};
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//
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// The constructor. This function sets up the object.
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//
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RGraph.Drawing.Image = function (conf)
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{
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var id = conf.id,
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canvas = document.getElementById(id),
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x = conf.x,
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y = conf.y,
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src = conf.src;
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// id, x, y
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this.id = id;
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this.canvas = document.getElementById(this.id);
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this.context = this.canvas.getContext('2d');
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this.colorsParsed = false;
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this.canvas.__object__ = this;
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this.alignmentProcessed = false;
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this.original_colors = [];
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this.firstDraw = true; // After the first draw this will be false
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//
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// Store the properties
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//
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this.x = x;
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this.y = y;
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this.src = src;
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this.img = new Image();
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this.img.src = this.src;
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//
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// This defines the type of this shape
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//
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this.type = 'drawing.image';
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//
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// This facilitates easy object identification, and should always be true
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//
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this.isRGraph = true;
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this.isrgraph = true;
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this.rgraph = true;
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//
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// This adds a uid to the object that you can use for identification purposes
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//
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this.uid = RGraph.createUID();
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//
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// This adds a UID to the canvas for identification purposes
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//
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this.canvas.uid = this.canvas.uid ? this.canvas.uid : RGraph.createUID();
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//
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// Some example background properties
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//
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this.properties =
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{
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marginTop: 35, // Used for clipping
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marginBottom: 35, // Used for clipping
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marginLeft: 35, // Used for clipping
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marginRight: 35, // Used for clipping
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src: null,
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width: null,
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height: null,
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halign: 'left',
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valign: 'top',
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shadow: false,
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shadowColor: 'gray',
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shadowOffsetx: 3,
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shadowOffsety: 3,
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shadowBlur: 5,
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tooltips: null,
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tooltipsHighlight: true,
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tooltipsCssClass: 'RGraph_tooltip',
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tooltipsCss: null,
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tooltipsEffect: 'slide',
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tooltipsEvent: 'onclick',
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tooltipsPersistent: false,
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tooltipsFormattedPoint: '.',
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tooltipsFormattedThousand: ',',
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tooltipsFormattedDecimals: 0,
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tooltipsFormattedUnitsPre: '',
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tooltipsFormattedUnitsPost: '',
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tooltipsFormattedListType: 'ul',
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tooltipsFormattedListItems: null,
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tooltipsPointer: true,
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tooltipsPointerOffsetx: 0,
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tooltipsPointerOffsety: 0,
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tooltipsPositionStatic: true,
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highlightStroke: 'rgba(0,0,0,0)',
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highlightFill: 'rgba(255,255,255,0.7)',
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colorsAlpha: 1,
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border: false,
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borderColor: 'black',
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borderLinewidth: 1,
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borderRadius: 0,
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backgroundColor: 'rgba(0,0,0,0)',
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text: null,
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clearto: 'rgba(0,0,0,0)',
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clip: null,
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events: {}
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}
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//
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// Add the reverse look-up table for property names
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// so that property names can be specified in any case.
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//
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this.properties_lowercase_map = [];
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for (var i in this.properties) {
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if (typeof i === 'string') {
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this.properties_lowercase_map[i.toLowerCase()] = i;
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}
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}
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//
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// A simple check that the browser has canvas support
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//
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if (!this.canvas) {
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alert('[DRAWING.IMAGE] No canvas support');
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return;
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}
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//
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// This can be used to store the coordinates of shapes on the graph
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//
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this.coords = [];
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//
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// Create the dollar object so that functions can be added to them
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//
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this.$0 = {};
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// Easy access to properties and the path function
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var properties = this.properties;
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this.path = RGraph.pathObjectFunction;
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//
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// "Decorate" the object with the generic effects if the effects library has been included
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//
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if (RGraph.Effects && typeof RGraph.Effects.decorate === 'function') {
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RGraph.Effects.decorate(this);
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}
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//
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// A setter method for setting graph properties. It can be used like this: obj.set('colorsStroke', '#666');
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//
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// @param name string The name of the property to set OR it can be a map
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// of name/value settings like what you set in the constructor
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//
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this.set = function (name)
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{
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var value = typeof arguments[1] === 'undefined' ? null : arguments[1];
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// Go through all of the properties and make sure
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// that they're using the correct capitalisation
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if (typeof name === 'string') {
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name = this.properties_lowercase_map[name.toLowerCase()] || name;
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}
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// Set the colorsParsed flag to false if the colors
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// property is being set
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if (
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name === 'colorsBackground'
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|| name === 'highlightFill'
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|| name === 'highlightStroke'
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) {
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this.colorsParsed = false;
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}
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// the number of arguments is only one and it's an
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// object - parse it for configuration data and return.
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if (arguments.length === 1 && typeof arguments[0] === 'object') {
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for (i in arguments[0]) {
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if (typeof i === 'string') {
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this.set(i, arguments[0][i]);
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}
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}
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return this;
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}
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properties[name] = value;
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return this;
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};
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//
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// A getter method for retrieving graph properties. It can be used like this: obj.get('colorsStroke');
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//
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// @param name string The name of the property to get
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//
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this.get = function (name)
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{
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// Go through all of the properties and make sure
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// that they're using the correct capitalisation
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name = this.properties_lowercase_map[name.toLowerCase()] || name;
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return properties[name];
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};
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//
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// Draws the circle
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//
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this.draw = function ()
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{
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//
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// Fire the onbeforedraw event
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//
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RGraph.fireCustomEvent(this, 'onbeforedraw');
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//
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// Install clipping
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//
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// MUST be the first thing that's done after the
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// beforedraw event
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//
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if (!RGraph.isNullish(this.properties.clip)) {
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RGraph.clipTo.start(this, this.properties.clip);
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}
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// Translate half a pixel for antialiasing purposes - but only if it hasn't been
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// done already
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//
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// MUST be the first thing done!
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//
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if (!this.canvas.__rgraph_aa_translated__) {
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this.context.translate(0.5,0.5);
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this.canvas.__rgraph_aa_translated__ = true;
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}
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//
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// Parse the colors. This allows for simple gradient syntax
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//
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var obj = this;
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this.img.onload = function ()
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{
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if (!obj.colorsParsed) {
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obj.parseColors();
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// Don't want to do this again
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obj.colorsParsed = true;
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}
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obj.width = this.width;
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obj.height = this.height;
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if (!obj.alignmentProcessed) {
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var customWidthHeight = (typeof obj.properties.width == 'number' && typeof obj.properties.width == 'number');
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// Horizontal alignment
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if (obj.properties.halign === 'center') {
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obj.x -= customWidthHeight ? (obj.properties.width / 2) : (this.width / 2);
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} else if (obj.properties.halign == 'right') {
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obj.x -= customWidthHeight ? obj.properties.width : this.width;
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}
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// Vertical alignment
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if (obj.properties.valign === 'center') {
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obj.y -= customWidthHeight ? (obj.properties.height / 2) : (this.height / 2);
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} else if (obj.properties.valign == 'bottom') {
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obj.y -= customWidthHeight ? obj.properties.height : this.height;
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}
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// Don't do this again
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obj.alignmentProcessed = true;
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}
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}
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// The onload event doesn't always fire - so call it manually as well
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if (this.img.complete || this.img.readyState === 4) {
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this.img.onload();
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}
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//
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// Draw the image here
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//
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if (properties.shadow) {
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RGraph.setShadow(
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this,
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properties.shadowColor,
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properties.shadowOffsetx,
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properties.shadowOffsety,
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properties.shadowBlur
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);
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}
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var oldAlpha = this.context.globalAlpha;
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this.context.globalAlpha = properties.colorsAlpha;
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//
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// Draw a border around the image
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//
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if (properties.border) {
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this.context.strokeStyle = properties.borderColor;
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this.context.lineWidth = properties.borderLinewidth;
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var borderRadius = 0;
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// Work out the borderRadius only if the image has been loaded
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if (this.width || this.height) {
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borderRadius = Math.min(this.width / 2, this.height / 2)
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}
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if ((properties.width / 2) > borderRadius && (properties.height / 2) > borderRadius) {
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borderRadius = Math.min((properties.width / 2), (properties.height / 2))
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}
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if (properties.borderRadius < borderRadius) {
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borderRadius = properties.borderRadius;
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}
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this.context.beginPath();
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this.roundedRect(
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Math.round(this.x) - Math.round(this.context.lineWidth / 2),
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Math.round(this.y) - Math.round(this.context.lineWidth / 2),
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(properties.width || this.img.width) + this.context.lineWidth,
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(properties.height || this.img.height) + this.context.lineWidth,
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borderRadius
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);
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}
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if (borderRadius) {
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this.context.save();
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// Draw the rect that casts the shadow
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// Draw the background color
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this.drawBackgroundColor(borderRadius);
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// Clip the canvas
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this.context.beginPath();
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this.roundedRect(
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Math.round(this.x) - Math.round(this.context.lineWidth / 2),
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Math.round(this.y) - Math.round(this.context.lineWidth / 2),
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(properties.width || this.img.width) + this.context.lineWidth,
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(properties.height || this.img.height) + this.context.lineWidth,
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borderRadius
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);
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this.context.clip();
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} else {
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// Draw the background color
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this.drawBackgroundColor(0);
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}
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if (typeof properties.height === 'number' || typeof properties.width === 'number') {
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this.context.drawImage(
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this.img,
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Math.round(this.x),
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Math.round(this.y),
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properties.width || this.width,
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properties.height || this.height
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);
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} else {
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this.context.drawImage(
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this.img,
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Math.round(this.x),
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Math.round(this.y)
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);
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}
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// If borderRadius is enabled restore the canvas to it's pre-clipped state
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if (borderRadius) {
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this.context.restore();
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}
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RGraph.noShadow(this);
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// If the border is enabled need a stroke so that the border is drawn
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if (properties.border) {
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this.context.stroke();
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}
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this.context.globalAlpha = oldAlpha;
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var obj = this;
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this.img.onload = function ()
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{
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RGraph.redrawCanvas(obj.canvas);
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obj.coords[0] = [
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Math.round(obj.x),
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Math.round(obj.y),
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typeof properties.width === 'number' ? properties.width : this.width, typeof properties.height == 'number' ? properties.height : this.height
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];
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}
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RGraph.noShadow(this);
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//
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// Add custom text thats specified
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//
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RGraph.addCustomText(this);
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//
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// This installs the event listeners
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//
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RGraph.installEventListeners(this);
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//
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// End clipping
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//
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if (!RGraph.isNullish(this.properties.clip)) {
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RGraph.clipTo.end();
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}
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//
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// Fire the onfirstdraw event
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//
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if (this.firstDraw) {
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this.firstDraw = false;
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RGraph.fireCustomEvent(this, 'onfirstdraw');
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this.firstDrawFunc();
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}
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//
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// Fire the draw event
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//
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RGraph.fireCustomEvent(this, 'ondraw');
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return this;
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};
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//
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// Used in chaining. Runs a function there and then - not waiting for
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// the events to fire (eg the onbeforedraw event)
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//
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// @param function func The function to execute
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//
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this.exec = function (func)
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{
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func(this);
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return this;
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};
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//
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// The getObjectByXY() worker method
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//
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this.getObjectByXY = function (e)
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{
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var mouseXY = RGraph.getMouseXY(e);
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if (this.getShape(e)) {
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return this;
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}
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};
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//
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// Not used by the class during creating the shape, but is used by event handlers
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// to get the coordinates (if any) of the selected bar
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//
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// @param object e The event object
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// @param object OPTIONAL You can pass in the bar object instead of the
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// function using "this"
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//
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this.getShape = function (e)
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{
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var mouseXY = RGraph.getMouseXY(e),
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mouseX = mouseXY[0],
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mouseY = mouseXY[1];
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if ( this.coords
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&& this.coords[0]
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&& mouseXY[0] >= this.coords[0][0]
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&& mouseXY[0] <= (this.coords[0][0] + this.coords[0][2])
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&& mouseXY[1] >= this.coords[0][1]
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&& mouseXY[1] <= (this.coords[0][1] + this.coords[0][3])
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&& (this.properties.clip ? RGraph.clipTo.test(this, mouseX, mouseY) : true)
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) {
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if (RGraph.parseTooltipText && properties.tooltips) {
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var tooltip = RGraph.parseTooltipText(properties.tooltips, 0);
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}
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return {
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object: this,
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x: this.coords[0][0],
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y: this.coords[0][1],
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width: this.coords[0][2],
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height: this.coords[0][3],
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dataset: 0,
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index: 0,
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sequentialIndex: 0,
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tooltip: typeof tooltip === 'string' ? tooltip : null
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};
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}
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return null;
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};
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//
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// Each object type has its own Highlight() function which highlights the appropriate shape
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//
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// @param object shape The shape to highlight
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|
//
|
|
this.highlight = function (shape)
|
|
{
|
|
if (properties.tooltipsHighlight) {
|
|
if (typeof properties.highlightStyle === 'function') {
|
|
(properties.highlightStyle)(shape);
|
|
} else {
|
|
this.path(
|
|
'b r % % % % f % s %',
|
|
this.coords[0][0],this.coords[0][1],this.coords[0][2],this.coords[0][3],
|
|
properties.highlightFill, properties.highlightStroke
|
|
);
|
|
}
|
|
}
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
//
|
|
// This allows for easy specification of gradients
|
|
//
|
|
this.parseColors = function ()
|
|
{
|
|
// Save the original colors so that they can be restored when the canvas is reset
|
|
if (this.original_colors.length === 0) {
|
|
this.original_colors.colorsBackground = RGraph.arrayClone(properties.colorsBackground);
|
|
this.original_colors.highlightStroke = RGraph.arrayClone(properties.highlightStroke);
|
|
this.original_colors.highlightFill = RGraph.arrayClone(properties.highlightFill);
|
|
}
|
|
|
|
|
|
|
|
|
|
//
|
|
// Parse various properties for colors
|
|
//
|
|
properties.colorsBackground = this.parseSingleColorForGradient(properties.colorsBackground);
|
|
properties.highlightStroke = this.parseSingleColorForGradient(properties.highlightStroke);
|
|
properties.highlightFill = this.parseSingleColorForGradient(properties.highlightFill);
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
//
|
|
// Use this function to reset the object to the post-constructor state. Eg reset colors if
|
|
// need be etc
|
|
//
|
|
this.reset = function ()
|
|
{
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
//
|
|
// This parses a single color value
|
|
//
|
|
this.parseSingleColorForGradient = function (color)
|
|
{
|
|
if (!color) {
|
|
return color;
|
|
}
|
|
|
|
|
|
if (typeof color === 'string' && color.match(/^gradient\((.*)\)$/i)) {
|
|
|
|
// Allow for JSON gradients
|
|
if (color.match(/^gradient\(({.*})\)$/i)) {
|
|
return RGraph.parseJSONGradient({object: this, def: RegExp.$1});
|
|
}
|
|
|
|
var parts = RegExp.$1.split(':'),
|
|
grad = this.context.createLinearGradient(this.x, this.y, this.x + this.img.width, this.y),
|
|
diff = 1 / (parts.length - 1);
|
|
|
|
grad.addColorStop(0, RGraph.trim(parts[0]));
|
|
|
|
for (var j=1; j<parts.length; ++j) {
|
|
grad.addColorStop(j * diff, RGraph.trim(parts[j]));
|
|
}
|
|
}
|
|
|
|
return grad ? grad : color;
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
//
|
|
// Using a function to add events makes it easier to facilitate method chaining
|
|
//
|
|
// @param string type The type of even to add
|
|
// @param function func
|
|
//
|
|
this.on = function (type, func)
|
|
{
|
|
if (type.substr(0,2) !== 'on') {
|
|
type = 'on' + type;
|
|
}
|
|
|
|
if (typeof this[type] !== 'function') {
|
|
this[type] = func;
|
|
} else {
|
|
RGraph.addCustomEventListener(this, type, func);
|
|
}
|
|
|
|
return this;
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
//
|
|
// This function runs once only
|
|
// (put at the end of the file (before any effects))
|
|
//
|
|
this.firstDrawFunc = function ()
|
|
{
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
//
|
|
// This draws a rectangle for the border of the image with optional rounded corners
|
|
//
|
|
this.roundedRect = function (x, y, width, height, radius)
|
|
{
|
|
// Save the existing state of the canvas so that it can be restored later
|
|
this.context.save();
|
|
|
|
// Translate to the given X/Y coordinates
|
|
this.context.translate(x, y);
|
|
|
|
// Move to the center of the top horizontal line
|
|
this.context.moveTo(width / 2,0);
|
|
|
|
// Draw the rounded corners. The connecting lines in between them are drawn automatically
|
|
this.context.arcTo(width,0,width,height, Math.min(height / 2, radius));
|
|
this.context.arcTo(width, height, 0, height, Math.min(width / 2, radius));
|
|
this.context.arcTo(0, height, 0, 0, Math.min(height / 2, radius));
|
|
this.context.arcTo(0, 0, radius, 0, Math.min(width / 2, radius));
|
|
|
|
// Draw a line back to the start coordinates
|
|
this.context.lineTo(width / 2,0);
|
|
|
|
// Restore the state of the canvas to as it was before the save()
|
|
this.context.restore();
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
//
|
|
//
|
|
//
|
|
this.drawBackgroundColor = function (borderRadius)
|
|
{
|
|
this.context.beginPath();
|
|
this.context.fillStyle = properties.backgroundColor;
|
|
this.roundedRect(
|
|
Math.round(this.x) - Math.round(this.context.lineWidth / 2),
|
|
Math.round(this.y) - Math.round(this.context.lineWidth / 2),
|
|
(properties.width || this.img.width) + this.context.lineWidth,
|
|
(properties.height || this.img.height) + this.context.lineWidth,
|
|
borderRadius
|
|
);
|
|
this.context.fill();
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
//
|
|
// A worker function that handles Bar chart specific tooltip substitutions
|
|
//
|
|
this.tooltipSubstitutions = function (opt)
|
|
{
|
|
return {
|
|
index: 0,
|
|
dataset: 0,
|
|
sequentialIndex: 0,
|
|
value: null
|
|
};
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
//
|
|
// This allows for static tooltip positioning
|
|
//
|
|
this.positionTooltipStatic = function (args)
|
|
{
|
|
var obj = args.object,
|
|
e = args.event,
|
|
tooltip = args.tooltip,
|
|
index = args.index,
|
|
canvasXY = RGraph.getCanvasXY(obj.canvas);
|
|
|
|
// Position the tooltip in the X direction
|
|
args.tooltip.style.left = (
|
|
canvasXY[0] // The X coordinate of the canvas
|
|
+ this.x // The X coordinate of the image
|
|
+ ((properties.width || this.img.width) / 2) // Add half of the image width
|
|
- (tooltip.offsetWidth / 2) // Subtract half of the tooltip width
|
|
+ obj.properties.tooltipsOffsetx // Add any user defined offset
|
|
) + 'px';
|
|
|
|
args.tooltip.style.top = (
|
|
canvasXY[1] // The Y coordinate of the canvas
|
|
- tooltip.offsetHeight // The height of the tooltip
|
|
+ obj.properties.tooltipsOffsety // Add any user defined offset
|
|
+ this.y // Add the Y coordinate
|
|
- 10 // An arbitrary amount
|
|
) + 'px';
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
//
|
|
// Objects are now always registered so that the chart is redrawn if need be.
|
|
//
|
|
RGraph.register(this);
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
//
|
|
// This is the 'end' of the constructor so if the first argument
|
|
// contains configuration data - handle that.
|
|
//
|
|
RGraph.parseObjectStyleConfig(this, conf.options);
|
|
}; |