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971
mondumas/static/dist/drawingboard/drawingboard.nocontrol.js
vendored
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971
mondumas/static/dist/drawingboard/drawingboard.nocontrol.js
vendored
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@@ -0,0 +1,971 @@
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/* drawingboard.js v0.4.6 - https://github.com/Leimi/drawingboard.js
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* Copyright (c) 2015 Emmanuel Pelletier
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* Licensed MIT */
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(function() {
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'use strict';
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/**
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* SimpleUndo is a very basic javascript undo/redo stack for managing histories of basically anything.
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*
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* options are: {
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* * `provider` : required. a function to call on `save`, which should provide the current state of the historized object through the given "done" callback
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* * `maxLength` : the maximum number of items in history
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* * `opUpdate` : a function to call to notify of changes in history. Will be called on `save`, `undo`, `redo` and `clear`
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* }
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*
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*/
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var SimpleUndo = function(options) {
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var settings = options ? options : {};
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var defaultOptions = {
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provider: function() {
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throw new Error("No provider!");
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},
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maxLength: 30,
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onUpdate: function() {}
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};
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this.provider = (typeof settings.provider != 'undefined') ? settings.provider : defaultOptions.provider;
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this.maxLength = (typeof settings.maxLength != 'undefined') ? settings.maxLength : defaultOptions.maxLength;
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this.onUpdate = (typeof settings.onUpdate != 'undefined') ? settings.onUpdate : defaultOptions.onUpdate;
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this.initialItem = null;
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this.clear();
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};
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function truncate (stack, limit) {
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while (stack.length > limit) {
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stack.shift();
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}
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}
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SimpleUndo.prototype.initialize = function(initialItem) {
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this.stack[0] = initialItem;
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this.initialItem = initialItem;
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};
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SimpleUndo.prototype.clear = function() {
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this.stack = [this.initialItem];
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this.position = 0;
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this.onUpdate();
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};
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SimpleUndo.prototype.save = function() {
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this.provider(function(current) {
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truncate(this.stack, this.maxLength);
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this.position = Math.min(this.position,this.stack.length - 1);
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this.stack = this.stack.slice(0, this.position + 1);
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this.stack.push(current);
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this.position++;
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this.onUpdate();
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}.bind(this));
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};
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SimpleUndo.prototype.undo = function(callback) {
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if (this.canUndo()) {
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var item = this.stack[--this.position];
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this.onUpdate();
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if (callback) {
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callback(item);
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}
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}
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};
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SimpleUndo.prototype.redo = function(callback) {
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if (this.canRedo()) {
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var item = this.stack[++this.position];
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this.onUpdate();
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if (callback) {
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callback(item);
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}
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}
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};
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SimpleUndo.prototype.canUndo = function() {
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return this.position > 0;
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};
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SimpleUndo.prototype.canRedo = function() {
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return this.position < this.count();
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};
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SimpleUndo.prototype.count = function() {
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return this.stack.length - 1; // -1 because of initial item
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};
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//exports
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// node module
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if (typeof module != 'undefined') {
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module.exports = SimpleUndo;
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}
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// browser global
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if (typeof window != 'undefined') {
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window.SimpleUndo = SimpleUndo;
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}
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})();
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window.DrawingBoard = typeof DrawingBoard !== "undefined" ? DrawingBoard : {};
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DrawingBoard.Utils = {};
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/*!
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* Tim (lite)
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* github.com/premasagar/tim
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*//*
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A tiny, secure JavaScript micro-templating script.
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*/
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DrawingBoard.Utils.tpl = (function(){
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"use strict";
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var start = "{{",
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end = "}}",
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path = "[a-z0-9_][\\.a-z0-9_]*", // e.g. config.person.name
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pattern = new RegExp(start + "\\s*("+ path +")\\s*" + end, "gi"),
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undef;
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return function(template, data){
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// Merge data into the template string
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return template.replace(pattern, function(tag, token){
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var path = token.split("."),
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len = path.length,
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lookup = data,
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i = 0;
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for (; i < len; i++){
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lookup = lookup[path[i]];
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// Property not found
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if (lookup === undef){
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throw "tim: '" + path[i] + "' not found in " + tag;
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}
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// Return the required value
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if (i === len - 1){
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return lookup;
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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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* https://github.com/jeromeetienne/microevent.js
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* MicroEvent - to make any js object an event emitter (server or browser)
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*
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* - pure javascript - server compatible, browser compatible
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* - dont rely on the browser doms
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* - super simple - you get it immediatly, no mistery, no magic involved
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*
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* - create a MicroEventDebug with goodies to debug
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* - make it safer to use
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*/
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DrawingBoard.Utils.MicroEvent = function(){};
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DrawingBoard.Utils.MicroEvent.prototype = {
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bind : function(event, fct){
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this._events = this._events || {};
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this._events[event] = this._events[event] || [];
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this._events[event].push(fct);
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},
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unbind : function(event, fct){
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this._events = this._events || {};
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if( event in this._events === false ) return;
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this._events[event].splice(this._events[event].indexOf(fct), 1);
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},
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trigger : function(event /* , args... */){
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this._events = this._events || {};
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if( event in this._events === false ) return;
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for(var i = 0; i < this._events[event].length; i++){
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this._events[event][i].apply(this, Array.prototype.slice.call(arguments, 1));
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}
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}
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};
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//I know.
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DrawingBoard.Utils._boxBorderSize = function($el, withPadding, withMargin, direction) {
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withPadding = !!withPadding || true;
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withMargin = !!withMargin || false;
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var width = 0,
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props;
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if (direction == "width") {
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props = ['border-left-width', 'border-right-width'];
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if (withPadding) props.push('padding-left', 'padding-right');
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if (withMargin) props.push('margin-left', 'margin-right');
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} else {
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props = ['border-top-width', 'border-bottom-width'];
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if (withPadding) props.push('padding-top', 'padding-bottom');
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if (withMargin) props.push('margin-top', 'margin-bottom');
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}
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for (var i = props.length - 1; i >= 0; i--)
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width += parseInt($el.css(props[i]).replace('px', ''), 10);
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return width;
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};
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DrawingBoard.Utils.boxBorderWidth = function($el, withPadding, withMargin) {
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return DrawingBoard.Utils._boxBorderSize($el, withPadding, withMargin, 'width');
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};
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DrawingBoard.Utils.boxBorderHeight = function($el, withPadding, withMargin) {
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return DrawingBoard.Utils._boxBorderSize($el, withPadding, withMargin, 'height');
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};
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DrawingBoard.Utils.isColor = function(string) {
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if (!string || !string.length) return false;
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return (/(^#[0-9A-F]{6}$)|(^#[0-9A-F]{3}$)/i).test(string) || $.inArray(string.substring(0, 3), ['rgb', 'hsl']) !== -1;
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};
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/**
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* Packs an RGB color into a single integer.
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*/
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DrawingBoard.Utils.RGBToInt = function(r, g, b) {
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var c = 0;
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c |= (r & 255) << 16;
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c |= (g & 255) << 8;
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c |= (b & 255);
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return c;
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};
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/**
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* Returns informations on the pixel located at (x,y).
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*/
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DrawingBoard.Utils.pixelAt = function(image, x, y) {
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var i = (y * image.width + x) * 4;
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var c = DrawingBoard.Utils.RGBToInt(
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image.data[i],
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image.data[i + 1],
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image.data[i + 2]
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);
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return [
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i, // INDEX
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x, // X
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y, // Y
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c // COLOR
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];
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};
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/**
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* Compares two colors with the given tolerance (between 0 and 255).
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*/
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DrawingBoard.Utils.compareColors = function(a, b, tolerance) {
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if (tolerance === 0) {
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return (a === b);
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}
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var ra = (a >> 16) & 255, rb = (b >> 16) & 255,
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ga = (a >> 8) & 255, gb = (b >> 8) & 255,
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ba = a & 255, bb = b & 255;
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return (Math.abs(ra - rb) <= tolerance)
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&& (Math.abs(ga - gb) <= tolerance)
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&& (Math.abs(ba - bb) <= tolerance);
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};
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(function() {
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var lastTime = 0;
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var vendors = ['ms', 'moz', 'webkit', 'o'];
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for(var x = 0; x < vendors.length && !window.requestAnimationFrame; ++x) {
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window.requestAnimationFrame = window[vendors[x]+'RequestAnimationFrame'];
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window.cancelAnimationFrame = window[vendors[x]+'CancelAnimationFrame'] || window[vendors[x]+'CancelRequestAnimationFrame'];
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}
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}());
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window.DrawingBoard = typeof DrawingBoard !== "undefined" ? DrawingBoard : {};
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/**
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* pass the id of the html element to put the drawing board into
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* and some options : {
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* controls: array of controls to initialize with the drawingboard. 'Colors', 'Size', and 'Navigation' by default
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* instead of simple strings, you can pass an object to define a control opts
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* ie ['Color', { Navigation: { reset: false }}]
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* controlsPosition: "top left" by default. Define where to put the controls: at the "top" or "bottom" of the canvas, aligned to "left"/"right"/"center"
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* background: background of the drawing board. Give a hex color or an image url "#ffffff" (white) by default
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* color: pencil color ("#000000" by default)
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* size: pencil size (3 by default)
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* webStorage: 'session', 'local' or false ('session' by default). store the current drawing in session or local storage and restore it when you come back
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* droppable: true or false (false by default). If true, dropping an image on the canvas will include it and allow you to draw on it,
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* errorMessage: html string to put in the board's element on browsers that don't support canvas.
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* stretchImg: default behavior of image setting on the canvas: set to the canvas width/height or not? false by default
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* }
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*/
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DrawingBoard.Board = function(id, opts) {
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this.opts = this.mergeOptions(opts);
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this.ev = new DrawingBoard.Utils.MicroEvent();
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this.id = id;
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this.$el = $(document.getElementById(id));
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if (!this.$el.length)
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return false;
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||||
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||||
var tpl = '<div class="drawing-board-canvas-wrapper"></canvas><canvas class="drawing-board-canvas"></canvas><div class="drawing-board-cursor drawing-board-utils-hidden"></div></div>';
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if (this.opts.controlsPosition.indexOf("bottom") > -1) tpl += '<div class="drawing-board-controls"></div>';
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else tpl = '<div class="drawing-board-controls"></div>' + tpl;
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||||
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this.$el.addClass('drawing-board').append(tpl);
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this.dom = {
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$canvasWrapper: this.$el.find('.drawing-board-canvas-wrapper'),
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$canvas: this.$el.find('.drawing-board-canvas'),
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$cursor: this.$el.find('.drawing-board-cursor'),
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||||
$controls: this.$el.find('.drawing-board-controls')
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||||
};
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||||
|
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$.each(['left', 'right', 'center'], $.proxy(function(n, val) {
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if (this.opts.controlsPosition.indexOf(val) > -1) {
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this.dom.$controls.attr('data-align', val);
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return false;
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}
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||||
}, this));
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||||
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||||
this.canvas = this.dom.$canvas.get(0);
|
||||
this.ctx = this.canvas && this.canvas.getContext && this.canvas.getContext('2d') ? this.canvas.getContext('2d') : null;
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||||
this.color = this.opts.color;
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||||
if (!this.ctx) {
|
||||
if (this.opts.errorMessage)
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this.$el.html(this.opts.errorMessage);
|
||||
return false;
|
||||
}
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||||
|
||||
this.storage = this._getStorage();
|
||||
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||||
this.initHistory();
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//init default board values before controls are added (mostly pencil color and size)
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||||
this.reset({ webStorage: false, history: false, background: false });
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||||
//init controls (they will need the default board values to work like pencil color and size)
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||||
this.initControls();
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||||
//set board's size after the controls div is added
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||||
this.resize();
|
||||
//reset the board to take all resized space
|
||||
this.reset({ webStorage: false, history: false, background: true });
|
||||
this.restoreWebStorage();
|
||||
this.initDropEvents();
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||||
this.initDrawEvents();
|
||||
};
|
||||
|
||||
|
||||
|
||||
DrawingBoard.Board.defaultOpts = {
|
||||
controls: ['Color', 'DrawingMode', 'Size', 'Navigation'],
|
||||
controlsPosition: "top left",
|
||||
color: "#000000",
|
||||
size: 1,
|
||||
background: "#fff",
|
||||
eraserColor: "background",
|
||||
fillTolerance: 100,
|
||||
fillHack: true, //try to prevent issues with anti-aliasing with a little hack by default
|
||||
webStorage: 'session',
|
||||
droppable: false,
|
||||
enlargeYourContainer: false,
|
||||
errorMessage: "<p>It seems you use an obsolete browser. <a href=\"http://browsehappy.com/\" target=\"_blank\">Update it</a> to start drawing.</p>",
|
||||
stretchImg: false //when setting the canvas img, strech the image at the whole canvas size when this opt is true
|
||||
};
|
||||
|
||||
|
||||
|
||||
DrawingBoard.Board.prototype = {
|
||||
|
||||
mergeOptions: function(opts) {
|
||||
opts = $.extend({}, DrawingBoard.Board.defaultOpts, opts);
|
||||
if (!opts.background && opts.eraserColor === "background")
|
||||
opts.eraserColor = "transparent";
|
||||
return opts;
|
||||
},
|
||||
|
||||
/**
|
||||
* Canvas reset/resize methods: put back the canvas to its default values
|
||||
*
|
||||
* depending on options, can set color, size, background back to default values
|
||||
* and store the reseted canvas in webstorage and history queue
|
||||
*
|
||||
* resize values depend on the `enlargeYourContainer` option
|
||||
*/
|
||||
|
||||
reset: function(opts) {
|
||||
opts = $.extend({
|
||||
color: this.opts.color,
|
||||
size: this.opts.size,
|
||||
webStorage: true,
|
||||
history: true,
|
||||
background: false
|
||||
}, opts);
|
||||
|
||||
this.setMode('pencil');
|
||||
|
||||
if (opts.background) {
|
||||
this.resetBackground(this.opts.background, $.proxy(function() {
|
||||
if (opts.history) this.saveHistory();
|
||||
}, this));
|
||||
}
|
||||
|
||||
if (opts.color) this.setColor(opts.color);
|
||||
if (opts.size) this.ctx.lineWidth = opts.size;
|
||||
|
||||
this.ctx.lineCap = "round";
|
||||
this.ctx.lineJoin = "round";
|
||||
// this.ctx.clearRect(0, 0, this.ctx.canvas.width, this.ctx.canvas.width);
|
||||
|
||||
if (opts.webStorage) this.saveWebStorage();
|
||||
|
||||
// if opts.background we already dealt with the history
|
||||
if (opts.history && !opts.background) this.saveHistory();
|
||||
|
||||
this.blankCanvas = this.getImg();
|
||||
|
||||
this.ev.trigger('board:reset', opts);
|
||||
},
|
||||
|
||||
resetBackground: function(background, callback) {
|
||||
background = background || this.opts.background;
|
||||
|
||||
var bgIsColor = DrawingBoard.Utils.isColor(background);
|
||||
var prevMode = this.getMode();
|
||||
this.setMode('pencil');
|
||||
this.ctx.clearRect(0, 0, this.ctx.canvas.width, this.ctx.canvas.height);
|
||||
if (bgIsColor) {
|
||||
this.ctx.fillStyle = background;
|
||||
this.ctx.fillRect(0, 0, this.ctx.canvas.width, this.ctx.canvas.height);
|
||||
this.history.initialize(this.getImg());
|
||||
if (callback) callback();
|
||||
} else if (background)
|
||||
this.setImg(background, {
|
||||
callback: $.proxy(function() {
|
||||
this.history.initialize(this.getImg());
|
||||
if (callback) callback();
|
||||
}, this)
|
||||
});
|
||||
this.setMode(prevMode);
|
||||
},
|
||||
|
||||
resize: function() {
|
||||
this.dom.$controls.toggleClass('drawing-board-controls-hidden', (!this.controls || !this.controls.length));
|
||||
|
||||
var canvasWidth, canvasHeight;
|
||||
var widths = [
|
||||
this.$el.width(),
|
||||
DrawingBoard.Utils.boxBorderWidth(this.$el),
|
||||
DrawingBoard.Utils.boxBorderWidth(this.dom.$canvasWrapper, true, true)
|
||||
];
|
||||
var heights = [
|
||||
this.$el.height(),
|
||||
DrawingBoard.Utils.boxBorderHeight(this.$el),
|
||||
this.dom.$controls.height(),
|
||||
DrawingBoard.Utils.boxBorderHeight(this.dom.$controls, false, true),
|
||||
DrawingBoard.Utils.boxBorderHeight(this.dom.$canvasWrapper, true, true)
|
||||
];
|
||||
var that = this;
|
||||
var sum = function(values, multiplier) { //make the sum of all array values
|
||||
multiplier = multiplier || 1;
|
||||
var res = values[0];
|
||||
for (var i = 1; i < values.length; i++) {
|
||||
res = res + (values[i]*multiplier);
|
||||
}
|
||||
return res;
|
||||
};
|
||||
var sub = function(values) { return sum(values, -1); }; //substract all array values from the first one
|
||||
|
||||
if (this.opts.enlargeYourContainer) {
|
||||
canvasWidth = this.$el.width();
|
||||
canvasHeight = this.$el.height();
|
||||
|
||||
this.$el.width( sum(widths) );
|
||||
this.$el.height( sum(heights) );
|
||||
} else {
|
||||
canvasWidth = sub(widths);
|
||||
canvasHeight = sub(heights);
|
||||
}
|
||||
|
||||
this.dom.$canvasWrapper.css('width', canvasWidth + 'px');
|
||||
this.dom.$canvasWrapper.css('height', canvasHeight + 'px');
|
||||
|
||||
this.dom.$canvas.css('width', canvasWidth + 'px');
|
||||
this.dom.$canvas.css('height', canvasHeight + 'px');
|
||||
|
||||
this.canvas.width = canvasWidth;
|
||||
this.canvas.height = canvasHeight;
|
||||
},
|
||||
|
||||
|
||||
|
||||
/**
|
||||
* Controls:
|
||||
* the drawing board can has various UI elements to control it.
|
||||
* one control is represented by a class in the namespace DrawingBoard.Control
|
||||
* it must have a $el property (jQuery object), representing the html element to append on the drawing board at initialization.
|
||||
*
|
||||
*/
|
||||
|
||||
initControls: function() {
|
||||
this.controls = [];
|
||||
if (!this.opts.controls.length || !DrawingBoard.Control) return false;
|
||||
for (var i = 0; i < this.opts.controls.length; i++) {
|
||||
var c = null;
|
||||
if (typeof this.opts.controls[i] == "string")
|
||||
c = new window['DrawingBoard']['Control'][this.opts.controls[i]](this);
|
||||
else if (typeof this.opts.controls[i] == "object") {
|
||||
for (var controlName in this.opts.controls[i]) break;
|
||||
c = new window['DrawingBoard']['Control'][controlName](this, this.opts.controls[i][controlName]);
|
||||
}
|
||||
if (c) {
|
||||
this.addControl(c);
|
||||
}
|
||||
}
|
||||
},
|
||||
|
||||
//add a new control or an existing one at the position you want in the UI
|
||||
//to add a totally new control, you can pass a string with the js class as 1st parameter and control options as 2nd ie "addControl('Navigation', { reset: false }"
|
||||
//the last parameter (2nd or 3rd depending on the situation) is always the position you want to place the control at
|
||||
addControl: function(control, optsOrPos, pos) {
|
||||
if (typeof control !== "string" && (typeof control !== "object" || !control instanceof DrawingBoard.Control))
|
||||
return false;
|
||||
|
||||
var opts = typeof optsOrPos == "object" ? optsOrPos : {};
|
||||
pos = pos ? pos*1 : (typeof optsOrPos == "number" ? optsOrPos : null);
|
||||
|
||||
if (typeof control == "string")
|
||||
control = new window['DrawingBoard']['Control'][control](this, opts);
|
||||
|
||||
if (pos)
|
||||
this.dom.$controls.children().eq(pos).before(control.$el);
|
||||
else
|
||||
this.dom.$controls.append(control.$el);
|
||||
|
||||
if (!this.controls)
|
||||
this.controls = [];
|
||||
this.controls.push(control);
|
||||
this.dom.$controls.removeClass('drawing-board-controls-hidden');
|
||||
},
|
||||
|
||||
|
||||
|
||||
/**
|
||||
* History methods: undo and redo drawed lines
|
||||
*/
|
||||
|
||||
initHistory: function() {
|
||||
this.history = new SimpleUndo({
|
||||
maxLength: 30,
|
||||
provider: $.proxy(function(done) {
|
||||
done(this.getImg());
|
||||
}, this),
|
||||
onUpdate: $.proxy(function() {
|
||||
this.ev.trigger('historyNavigation');
|
||||
}, this)
|
||||
});
|
||||
},
|
||||
|
||||
saveHistory: function() {
|
||||
this.history.save();
|
||||
},
|
||||
|
||||
restoreHistory: function(image) {
|
||||
this.setImg(image, {
|
||||
callback: $.proxy(function() {
|
||||
this.saveWebStorage();
|
||||
}, this)
|
||||
});
|
||||
},
|
||||
|
||||
goBackInHistory: function() {
|
||||
this.history.undo($.proxy(this.restoreHistory, this));
|
||||
},
|
||||
|
||||
goForthInHistory: function() {
|
||||
this.history.redo($.proxy(this.restoreHistory, this));
|
||||
},
|
||||
|
||||
/**
|
||||
* Image methods: you can directly put an image on the canvas, get it in base64 data url or start a download
|
||||
*/
|
||||
|
||||
setImg: function(src, opts) {
|
||||
opts = $.extend({
|
||||
stretch: this.opts.stretchImg,
|
||||
callback: null
|
||||
}, opts);
|
||||
|
||||
var ctx = this.ctx;
|
||||
var img = new Image();
|
||||
var oldGCO = ctx.globalCompositeOperation;
|
||||
img.onload = function() {
|
||||
ctx.globalCompositeOperation = "source-over";
|
||||
ctx.clearRect(0, 0, ctx.canvas.width, ctx.canvas.height);
|
||||
|
||||
if (opts.stretch) {
|
||||
ctx.drawImage(img, 0, 0, ctx.canvas.width, ctx.canvas.height);
|
||||
} else {
|
||||
ctx.drawImage(img, 0, 0);
|
||||
}
|
||||
|
||||
ctx.globalCompositeOperation = oldGCO;
|
||||
|
||||
if (opts.callback) {
|
||||
opts.callback();
|
||||
}
|
||||
};
|
||||
img.src = src;
|
||||
},
|
||||
|
||||
getImg: function() {
|
||||
return this.canvas.toDataURL("image/png");
|
||||
},
|
||||
|
||||
downloadImg: function() {
|
||||
var img = this.getImg();
|
||||
img = img.replace("image/png", "image/octet-stream");
|
||||
window.location.href = img;
|
||||
},
|
||||
|
||||
|
||||
|
||||
/**
|
||||
* WebStorage handling : save and restore to local or session storage
|
||||
*/
|
||||
|
||||
saveWebStorage: function() {
|
||||
if (window[this.storage]) {
|
||||
window[this.storage].setItem('drawing-board-' + this.id, this.getImg());
|
||||
this.ev.trigger('board:save' + this.storage.charAt(0).toUpperCase() + this.storage.slice(1), this.getImg());
|
||||
}
|
||||
},
|
||||
|
||||
restoreWebStorage: function() {
|
||||
if (window[this.storage] && window[this.storage].getItem('drawing-board-' + this.id) !== null) {
|
||||
this.setImg(window[this.storage].getItem('drawing-board-' + this.id));
|
||||
this.ev.trigger('board:restore' + this.storage.charAt(0).toUpperCase() + this.storage.slice(1), window[this.storage].getItem('drawing-board-' + this.id));
|
||||
}
|
||||
},
|
||||
|
||||
clearWebStorage: function() {
|
||||
if (window[this.storage] && window[this.storage].getItem('drawing-board-' + this.id) !== null) {
|
||||
window[this.storage].removeItem('drawing-board-' + this.id);
|
||||
this.ev.trigger('board:clear' + this.storage.charAt(0).toUpperCase() + this.storage.slice(1));
|
||||
}
|
||||
},
|
||||
|
||||
_getStorage: function() {
|
||||
if (!this.opts.webStorage || !(this.opts.webStorage === 'session' || this.opts.webStorage === 'local')) return false;
|
||||
return this.opts.webStorage + 'Storage';
|
||||
},
|
||||
|
||||
|
||||
|
||||
/**
|
||||
* Drop an image on the canvas to draw on it
|
||||
*/
|
||||
|
||||
initDropEvents: function() {
|
||||
if (!this.opts.droppable)
|
||||
return false;
|
||||
|
||||
this.dom.$canvas.on('dragover dragenter drop', function(e) {
|
||||
e.stopPropagation();
|
||||
e.preventDefault();
|
||||
});
|
||||
|
||||
this.dom.$canvas.on('drop', $.proxy(this._onCanvasDrop, this));
|
||||
},
|
||||
|
||||
_onCanvasDrop: function(e) {
|
||||
e = e.originalEvent ? e.originalEvent : e;
|
||||
var files = e.dataTransfer.files;
|
||||
if (!files || !files.length || files[0].type.indexOf('image') == -1 || !window.FileReader)
|
||||
return false;
|
||||
var fr = new FileReader();
|
||||
fr.readAsDataURL(files[0]);
|
||||
fr.onload = $.proxy(function(ev) {
|
||||
this.setImg(ev.target.result, {
|
||||
callback: $.proxy(function() {
|
||||
this.saveHistory();
|
||||
}, this)
|
||||
});
|
||||
this.ev.trigger('board:imageDropped', ev.target.result);
|
||||
this.ev.trigger('board:userAction');
|
||||
}, this);
|
||||
},
|
||||
|
||||
|
||||
|
||||
/**
|
||||
* set and get current drawing mode
|
||||
*
|
||||
* possible modes are "pencil" (draw normally), "eraser" (draw transparent, like, erase, you know), "filler" (paint can)
|
||||
*/
|
||||
|
||||
setMode: function(newMode, silent) {
|
||||
silent = silent || false;
|
||||
newMode = newMode || 'pencil';
|
||||
|
||||
this.ev.unbind('board:startDrawing', $.proxy(this.fill, this));
|
||||
|
||||
if (this.opts.eraserColor === "transparent")
|
||||
this.ctx.globalCompositeOperation = newMode === "eraser" ? "destination-out" : "source-over";
|
||||
else {
|
||||
if (newMode === "eraser") {
|
||||
if (this.opts.eraserColor === "background" && DrawingBoard.Utils.isColor(this.opts.background))
|
||||
this.ctx.strokeStyle = this.opts.background;
|
||||
else if (DrawingBoard.Utils.isColor(this.opts.eraserColor))
|
||||
this.ctx.strokeStyle = this.opts.eraserColor;
|
||||
} else if (!this.mode || this.mode === "eraser") {
|
||||
this.ctx.strokeStyle = this.color;
|
||||
}
|
||||
|
||||
if (newMode === "filler")
|
||||
this.ev.bind('board:startDrawing', $.proxy(this.fill, this));
|
||||
}
|
||||
this.mode = newMode;
|
||||
if (!silent)
|
||||
this.ev.trigger('board:mode', this.mode);
|
||||
},
|
||||
|
||||
getMode: function() {
|
||||
return this.mode || "pencil";
|
||||
},
|
||||
|
||||
setColor: function(color) {
|
||||
var that = this;
|
||||
color = color || this.color;
|
||||
if (!DrawingBoard.Utils.isColor(color))
|
||||
return false;
|
||||
this.color = color;
|
||||
if (this.opts.eraserColor !== "transparent" && this.mode === "eraser") {
|
||||
var setStrokeStyle = function(mode) {
|
||||
if (mode !== "eraser")
|
||||
that.strokeStyle = that.color;
|
||||
that.ev.unbind('board:mode', setStrokeStyle);
|
||||
};
|
||||
this.ev.bind('board:mode', setStrokeStyle);
|
||||
} else
|
||||
this.ctx.strokeStyle = this.color;
|
||||
},
|
||||
|
||||
/**
|
||||
* Fills an area with the current stroke color.
|
||||
*/
|
||||
fill: function(e) {
|
||||
if (this.getImg() === this.blankCanvas) {
|
||||
this.ctx.clearRect(0, 0, this.ctx.canvas.width, this.ctx.canvas.height);
|
||||
this.ctx.fillStyle = this.color;
|
||||
this.ctx.fillRect(0, 0, this.ctx.canvas.width, this.ctx.canvas.height);
|
||||
return;
|
||||
}
|
||||
|
||||
var img = this.ctx.getImageData(0, 0, this.canvas.width, this.canvas.height);
|
||||
|
||||
// constants identifying pixels components
|
||||
var INDEX = 0, X = 1, Y = 2, COLOR = 3;
|
||||
|
||||
// target color components
|
||||
var stroke = this.ctx.strokeStyle;
|
||||
var r = parseInt(stroke.substr(1, 2), 16);
|
||||
var g = parseInt(stroke.substr(3, 2), 16);
|
||||
var b = parseInt(stroke.substr(5, 2), 16);
|
||||
|
||||
// starting point
|
||||
var start = DrawingBoard.Utils.pixelAt(img, parseInt(e.coords.x, 10), parseInt(e.coords.y, 10));
|
||||
var startColor = start[COLOR];
|
||||
var tolerance = this.opts.fillTolerance;
|
||||
var useHack = this.opts.fillHack; //see https://github.com/Leimi/drawingboard.js/pull/38
|
||||
|
||||
// no need to continue if starting and target colors are the same
|
||||
if (DrawingBoard.Utils.compareColors(startColor, DrawingBoard.Utils.RGBToInt(r, g, b), tolerance))
|
||||
return;
|
||||
|
||||
// pixels to evaluate
|
||||
var queue = [start];
|
||||
|
||||
// loop vars
|
||||
var pixel, x, y;
|
||||
var maxX = img.width - 1;
|
||||
var maxY = img.height - 1;
|
||||
|
||||
function updatePixelColor(pixel) {
|
||||
img.data[pixel[INDEX]] = r;
|
||||
img.data[pixel[INDEX] + 1] = g;
|
||||
img.data[pixel[INDEX] + 2] = b;
|
||||
}
|
||||
|
||||
while ((pixel = queue.pop())) {
|
||||
if (useHack)
|
||||
updatePixelColor(pixel);
|
||||
|
||||
if (DrawingBoard.Utils.compareColors(pixel[COLOR], startColor, tolerance)) {
|
||||
if (!useHack)
|
||||
updatePixelColor(pixel);
|
||||
if (pixel[X] > 0) // west
|
||||
queue.push(DrawingBoard.Utils.pixelAt(img, pixel[X] - 1, pixel[Y]));
|
||||
if (pixel[X] < maxX) // east
|
||||
queue.push(DrawingBoard.Utils.pixelAt(img, pixel[X] + 1, pixel[Y]));
|
||||
if (pixel[Y] > 0) // north
|
||||
queue.push(DrawingBoard.Utils.pixelAt(img, pixel[X], pixel[Y] - 1));
|
||||
if (pixel[Y] < maxY) // south
|
||||
queue.push(DrawingBoard.Utils.pixelAt(img, pixel[X], pixel[Y] + 1));
|
||||
}
|
||||
}
|
||||
|
||||
this.ctx.putImageData(img, 0, 0);
|
||||
},
|
||||
|
||||
|
||||
/**
|
||||
* Drawing handling, with mouse or touch
|
||||
*/
|
||||
|
||||
initDrawEvents: function() {
|
||||
this.isDrawing = false;
|
||||
this.isMouseHovering = false;
|
||||
this.coords = {};
|
||||
this.coords.old = this.coords.current = this.coords.oldMid = { x: 0, y: 0 };
|
||||
|
||||
this.dom.$canvas.on('mousedown touchstart', $.proxy(function(e) {
|
||||
this._onInputStart(e, this._getInputCoords(e) );
|
||||
}, this));
|
||||
|
||||
this.dom.$canvas.on('mousemove touchmove', $.proxy(function(e) {
|
||||
this._onInputMove(e, this._getInputCoords(e) );
|
||||
}, this));
|
||||
|
||||
this.dom.$canvas.on('mousemove', $.proxy(function(e) {
|
||||
|
||||
}, this));
|
||||
|
||||
this.dom.$canvas.on('mouseup touchend', $.proxy(function(e) {
|
||||
this._onInputStop(e, this._getInputCoords(e) );
|
||||
}, this));
|
||||
|
||||
this.dom.$canvas.on('mouseover', $.proxy(function(e) {
|
||||
this._onMouseOver(e, this._getInputCoords(e) );
|
||||
}, this));
|
||||
|
||||
this.dom.$canvas.on('mouseout', $.proxy(function(e) {
|
||||
this._onMouseOut(e, this._getInputCoords(e) );
|
||||
|
||||
}, this));
|
||||
|
||||
$('body').on('mouseup touchend', $.proxy(function(e) {
|
||||
this.isDrawing = false;
|
||||
}, this));
|
||||
|
||||
if (window.requestAnimationFrame) requestAnimationFrame( $.proxy(this.draw, this) );
|
||||
},
|
||||
|
||||
draw: function() {
|
||||
//if the pencil size is big (>10), the small crosshair makes a friend: a circle of the size of the pencil
|
||||
//todo: have the circle works on every browser - it currently should be added only when CSS pointer-events are supported
|
||||
//we assume that if requestAnimationFrame is supported, pointer-events is too, but this is terribad.
|
||||
if (window.requestAnimationFrame && this.ctx.lineWidth > 10 && this.isMouseHovering) {
|
||||
this.dom.$cursor.css({ width: this.ctx.lineWidth + 'px', height: this.ctx.lineWidth + 'px' });
|
||||
var transform = DrawingBoard.Utils.tpl("translateX({{x}}px) translateY({{y}}px)", { x: this.coords.current.x-(this.ctx.lineWidth/2), y: this.coords.current.y-(this.ctx.lineWidth/2) });
|
||||
this.dom.$cursor.css({ 'transform': transform, '-webkit-transform': transform, '-ms-transform': transform });
|
||||
this.dom.$cursor.removeClass('drawing-board-utils-hidden');
|
||||
} else {
|
||||
this.dom.$cursor.addClass('drawing-board-utils-hidden');
|
||||
}
|
||||
|
||||
if (this.isDrawing) {
|
||||
var currentMid = this._getMidInputCoords(this.coords.current);
|
||||
this.ctx.beginPath();
|
||||
this.ctx.moveTo(currentMid.x, currentMid.y);
|
||||
this.ctx.quadraticCurveTo(this.coords.old.x, this.coords.old.y, this.coords.oldMid.x, this.coords.oldMid.y);
|
||||
this.ctx.stroke();
|
||||
|
||||
this.coords.old = this.coords.current;
|
||||
this.coords.oldMid = currentMid;
|
||||
}
|
||||
|
||||
if (window.requestAnimationFrame) requestAnimationFrame( $.proxy(function() { this.draw(); }, this) );
|
||||
},
|
||||
|
||||
_onInputStart: function(e, coords) {
|
||||
this.coords.current = this.coords.old = coords;
|
||||
this.coords.oldMid = this._getMidInputCoords(coords);
|
||||
this.isDrawing = true;
|
||||
|
||||
if (!window.requestAnimationFrame) this.draw();
|
||||
|
||||
this.ev.trigger('board:startDrawing', {e: e, coords: coords});
|
||||
e.stopPropagation();
|
||||
e.preventDefault();
|
||||
},
|
||||
|
||||
_onInputMove: function(e, coords) {
|
||||
this.coords.current = coords;
|
||||
this.ev.trigger('board:drawing', {e: e, coords: coords});
|
||||
|
||||
if (!window.requestAnimationFrame) this.draw();
|
||||
|
||||
e.stopPropagation();
|
||||
e.preventDefault();
|
||||
},
|
||||
|
||||
_onInputStop: function(e, coords) {
|
||||
if (this.isDrawing && (!e.touches || e.touches.length === 0)) {
|
||||
this.isDrawing = false;
|
||||
|
||||
this.saveWebStorage();
|
||||
this.saveHistory();
|
||||
|
||||
this.ev.trigger('board:stopDrawing', {e: e, coords: coords});
|
||||
this.ev.trigger('board:userAction');
|
||||
e.stopPropagation();
|
||||
e.preventDefault();
|
||||
}
|
||||
},
|
||||
|
||||
_onMouseOver: function(e, coords) {
|
||||
this.isMouseHovering = true;
|
||||
this.coords.old = this._getInputCoords(e);
|
||||
this.coords.oldMid = this._getMidInputCoords(this.coords.old);
|
||||
|
||||
this.ev.trigger('board:mouseOver', {e: e, coords: coords});
|
||||
},
|
||||
|
||||
_onMouseOut: function(e, coords) {
|
||||
this.isMouseHovering = false;
|
||||
|
||||
this.ev.trigger('board:mouseOut', {e: e, coords: coords});
|
||||
},
|
||||
|
||||
_getInputCoords: function(e) {
|
||||
e = e.originalEvent ? e.originalEvent : e;
|
||||
var
|
||||
rect = this.canvas.getBoundingClientRect(),
|
||||
width = this.dom.$canvas.width(),
|
||||
height = this.dom.$canvas.height()
|
||||
;
|
||||
var x, y;
|
||||
if (e.touches && e.touches.length == 1) {
|
||||
x = e.touches[0].pageX;
|
||||
y = e.touches[0].pageY;
|
||||
} else {
|
||||
x = e.pageX;
|
||||
y = e.pageY;
|
||||
}
|
||||
x = x - this.dom.$canvas.offset().left;
|
||||
y = y - this.dom.$canvas.offset().top;
|
||||
x *= (width / rect.width);
|
||||
y *= (height / rect.height);
|
||||
return {
|
||||
x: x,
|
||||
y: y
|
||||
};
|
||||
},
|
||||
|
||||
_getMidInputCoords: function(coords) {
|
||||
return {
|
||||
x: this.coords.old.x + coords.x>>1,
|
||||
y: this.coords.old.y + coords.y>>1
|
||||
};
|
||||
}
|
||||
};
|
||||
Reference in New Issue
Block a user