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svg-pan-zoom.js
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svg-pan-zoom.js
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// svg-pan-zoom v3.6.0
// https://github.com/ariutta/svg-pan-zoom
(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
var svgPanZoom = require('./svg-pan-zoom.js');
// UMD module definition
(function(window, document){
// AMD
if (typeof define === 'function' && define.amd) {
define('svg-pan-zoom', function () {
return svgPanZoom;
});
// CMD
} else if (typeof module !== 'undefined' && module.exports) {
module.exports = svgPanZoom;
// Browser
// Keep exporting globally as module.exports is available because of browserify
window.svgPanZoom = svgPanZoom;
}
})(window, document)
},{"./svg-pan-zoom.js":4}],2:[function(require,module,exports){
var SvgUtils = require('./svg-utilities');
module.exports = {
enable: function(instance) {
// Select (and create if necessary) defs
var defs = instance.svg.querySelector('defs')
if (!defs) {
defs = document.createElementNS(SvgUtils.svgNS, 'defs')
instance.svg.appendChild(defs)
}
// Check for style element, and create it if it doesn't exist
var styleEl = defs.querySelector('style#svg-pan-zoom-controls-styles');
if (!styleEl) {
var style = document.createElementNS(SvgUtils.svgNS, 'style')
style.setAttribute('id', 'svg-pan-zoom-controls-styles')
style.setAttribute('type', 'text/css')
style.textContent = '.svg-pan-zoom-control { cursor: pointer; fill: black; fill-opacity: 0.333; } .svg-pan-zoom-control:hover { fill-opacity: 0.8; } .svg-pan-zoom-control-background { fill: white; fill-opacity: 0.5; } .svg-pan-zoom-control-background { fill-opacity: 0.8; }'
defs.appendChild(style)
}
// Zoom Group
var zoomGroup = document.createElementNS(SvgUtils.svgNS, 'g');
zoomGroup.setAttribute('id', 'svg-pan-zoom-controls');
zoomGroup.setAttribute('transform', 'translate(' + ( instance.width - 70 ) + ' ' + ( instance.height - 76 ) + ') scale(0.75)');
zoomGroup.setAttribute('class', 'svg-pan-zoom-control');
// Control elements
// zoomGroup.appendChild(this._createZoomIn(instance))
// zoomGroup.appendChild(this._createZoomReset(instance))
// zoomGroup.appendChild(this._createZoomOut(instance))
// instead of appending stuff, just run the creator...
this._createZoomIn(instance)
this._createZoomOut(instance)
// Finally append created element
instance.svg.appendChild(zoomGroup)
// Cache control instance
instance.controlIcons = zoomGroup
}
, _createZoomIn: function(instance) {
var zoomIn = document.getElementById('zoom-in')
// zoomIn.setAttribute('id', 'svg-pan-zoom-zoom-in');
// zoomIn.setAttribute('transform', 'translate(30.5 5) scale(0.015)');
// zoomIn.setAttribute('class', 'svg-pan-zoom-control');
zoomIn.addEventListener('click', function() {instance.getPublicInstance().zoomIn()}, false)
zoomIn.addEventListener('touchstart', function() {instance.getPublicInstance().zoomIn()}, false)
// var zoomInBackground = document.createElementNS(SvgUtils.svgNS, 'rect'); // TODO change these background space fillers to rounded rectangles so they look prettier
// zoomInBackground.setAttribute('x', '0');
// zoomInBackground.setAttribute('y', '0');
// zoomInBackground.setAttribute('width', '1500'); // larger than expected because the whole group is transformed to scale down
// zoomInBackground.setAttribute('height', '1400');
// zoomInBackground.setAttribute('class', 'svg-pan-zoom-control-background');
// zoomIn.appendChild(zoomInBackground);
// var zoomInShape = document.createElementNS(SvgUtils.svgNS, 'path');
// zoomInShape.setAttribute('d', 'M1280 576v128q0 26 -19 45t-45 19h-320v320q0 26 -19 45t-45 19h-128q-26 0 -45 -19t-19 -45v-320h-320q-26 0 -45 -19t-19 -45v-128q0 -26 19 -45t45 -19h320v-320q0 -26 19 -45t45 -19h128q26 0 45 19t19 45v320h320q26 0 45 19t19 45zM1536 1120v-960 q0 -119 -84.5 -203.5t-203.5 -84.5h-960q-119 0 -203.5 84.5t-84.5 203.5v960q0 119 84.5 203.5t203.5 84.5h960q119 0 203.5 -84.5t84.5 -203.5z');
// zoomInShape.setAttribute('class', 'svg-pan-zoom-control-element');
// zoomIn.appendChild(zoomInShape);
return zoomIn
}
, _createZoomReset: function(instance){
// reset
var resetPanZoomControl = document.createElementNS(SvgUtils.svgNS, 'g');
resetPanZoomControl.setAttribute('id', 'svg-pan-zoom-reset-pan-zoom');
resetPanZoomControl.setAttribute('transform', 'translate(5 35) scale(0.4)');
resetPanZoomControl.setAttribute('class', 'svg-pan-zoom-control');
resetPanZoomControl.addEventListener('click', function() {instance.getPublicInstance().reset()}, false);
resetPanZoomControl.addEventListener('touchstart', function() {instance.getPublicInstance().reset()}, false);
var resetPanZoomControlBackground = document.createElementNS(SvgUtils.svgNS, 'rect'); // TODO change these background space fillers to rounded rectangles so they look prettier
resetPanZoomControlBackground.setAttribute('x', '2');
resetPanZoomControlBackground.setAttribute('y', '2');
resetPanZoomControlBackground.setAttribute('width', '182'); // larger than expected because the whole group is transformed to scale down
resetPanZoomControlBackground.setAttribute('height', '58');
resetPanZoomControlBackground.setAttribute('class', 'svg-pan-zoom-control-background');
resetPanZoomControl.appendChild(resetPanZoomControlBackground);
var resetPanZoomControlShape1 = document.createElementNS(SvgUtils.svgNS, 'path');
resetPanZoomControlShape1.setAttribute('d', 'M33.051,20.632c-0.742-0.406-1.854-0.609-3.338-0.609h-7.969v9.281h7.769c1.543,0,2.701-0.188,3.473-0.562c1.365-0.656,2.048-1.953,2.048-3.891C35.032,22.757,34.372,21.351,33.051,20.632z');
resetPanZoomControlShape1.setAttribute('class', 'svg-pan-zoom-control-element');
resetPanZoomControl.appendChild(resetPanZoomControlShape1);
var resetPanZoomControlShape2 = document.createElementNS(SvgUtils.svgNS, 'path');
resetPanZoomControlShape2.setAttribute('d', 'M170.231,0.5H15.847C7.102,0.5,0.5,5.708,0.5,11.84v38.861C0.5,56.833,7.102,61.5,15.847,61.5h154.384c8.745,0,15.269-4.667,15.269-10.798V11.84C185.5,5.708,178.976,0.5,170.231,0.5z M42.837,48.569h-7.969c-0.219-0.766-0.375-1.383-0.469-1.852c-0.188-0.969-0.289-1.961-0.305-2.977l-0.047-3.211c-0.03-2.203-0.41-3.672-1.142-4.406c-0.732-0.734-2.103-1.102-4.113-1.102h-7.05v13.547h-7.055V14.022h16.524c2.361,0.047,4.178,0.344,5.45,0.891c1.272,0.547,2.351,1.352,3.234,2.414c0.731,0.875,1.31,1.844,1.737,2.906s0.64,2.273,0.64,3.633c0,1.641-0.414,3.254-1.242,4.84s-2.195,2.707-4.102,3.363c1.594,0.641,2.723,1.551,3.387,2.73s0.996,2.98,0.996,5.402v2.32c0,1.578,0.063,2.648,0.19,3.211c0.19,0.891,0.635,1.547,1.333,1.969V48.569z M75.579,48.569h-26.18V14.022h25.336v6.117H56.454v7.336h16.781v6H56.454v8.883h19.125V48.569z M104.497,46.331c-2.44,2.086-5.887,3.129-10.34,3.129c-4.548,0-8.125-1.027-10.731-3.082s-3.909-4.879-3.909-8.473h6.891c0.224,1.578,0.662,2.758,1.316,3.539c1.196,1.422,3.246,2.133,6.15,2.133c1.739,0,3.151-0.188,4.236-0.562c2.058-0.719,3.087-2.055,3.087-4.008c0-1.141-0.504-2.023-1.512-2.648c-1.008-0.609-2.607-1.148-4.796-1.617l-3.74-0.82c-3.676-0.812-6.201-1.695-7.576-2.648c-2.328-1.594-3.492-4.086-3.492-7.477c0-3.094,1.139-5.664,3.417-7.711s5.623-3.07,10.036-3.07c3.685,0,6.829,0.965,9.431,2.895c2.602,1.93,3.966,4.73,4.093,8.402h-6.938c-0.128-2.078-1.057-3.555-2.787-4.43c-1.154-0.578-2.587-0.867-4.301-0.867c-1.907,0-3.428,0.375-4.565,1.125c-1.138,0.75-1.706,1.797-1.706,3.141c0,1.234,0.561,2.156,1.682,2.766c0.721,0.406,2.25,0.883,4.589,1.43l6.063,1.43c2.657,0.625,4.648,1.461,5.975,2.508c2.059,1.625,3.089,3.977,3.089,7.055C108.157,41.624,106.937,44.245,104.497,46.331z M139.61,48.569h-26.18V14.022h25.336v6.117h-18.281v7.336h16.781v6h-16.781v8.883h19.125V48.569z M170.337,20.14h-10.336v28.43h-7.266V20.14h-10.383v-6.117h27.984V20.14z');
resetPanZoomControlShape2.setAttribute('class', 'svg-pan-zoom-control-element');
resetPanZoomControl.appendChild(resetPanZoomControlShape2);
return resetPanZoomControl
}
, _createZoomOut: function(instance){
// zoom out
var zoomOut = document.getElementById('zoom-out')
// zoomOut.setAttribute('id', 'svg-pan-zoom-zoom-out');
// zoomOut.setAttribute('transform', 'translate(30.5 70) scale(0.015)');
// zoomOut.setAttribute('class', 'svg-pan-zoom-control');
zoomOut.addEventListener('click', function() {instance.getPublicInstance().zoomOut()}, false);
zoomOut.addEventListener('touchstart', function() {instance.getPublicInstance().zoomOut()}, false);
// var zoomOutBackground = document.createElementNS(SvgUtils.svgNS, 'rect'); // TODO change these background space fillers to rounded rectangles so they look prettier
// zoomOutBackground.setAttribute('x', '0');
// zoomOutBackground.setAttribute('y', '0');
// zoomOutBackground.setAttribute('width', '1500'); // larger than expected because the whole group is transformed to scale down
// zoomOutBackground.setAttribute('height', '1400');
// zoomOutBackground.setAttribute('class', 'svg-pan-zoom-control-background');
// zoomOut.appendChild(zoomOutBackground);
// var zoomOutShape = document.createElementNS(SvgUtils.svgNS, 'path');
// zoomOutShape.setAttribute('d', 'M1280 576v128q0 26 -19 45t-45 19h-896q-26 0 -45 -19t-19 -45v-128q0 -26 19 -45t45 -19h896q26 0 45 19t19 45zM1536 1120v-960q0 -119 -84.5 -203.5t-203.5 -84.5h-960q-119 0 -203.5 84.5t-84.5 203.5v960q0 119 84.5 203.5t203.5 84.5h960q119 0 203.5 -84.5 t84.5 -203.5z');
// zoomOutShape.setAttribute('class', 'svg-pan-zoom-control-element');
// zoomOut.appendChild(zoomOutShape);
return zoomOut
}
, disable: function(instance) {
if (instance.controlIcons) {
instance.controlIcons.parentNode.removeChild(instance.controlIcons)
instance.controlIcons = null
}
}
}
},{"./svg-utilities":5}],3:[function(require,module,exports){
var SvgUtils = require('./svg-utilities')
, Utils = require('./utilities')
;
var ShadowViewport = function(viewport, options){
this.init(viewport, options)
}
/**
* Initialization
*
* @param {SVGElement} viewport
* @param {Object} options
*/
ShadowViewport.prototype.init = function(viewport, options) {
// DOM Elements
this.viewport = viewport
this.options = options
// State cache
this.originalState = {zoom: 1, x: 0, y: 0}
this.activeState = {zoom: 1, x: 0, y: 0}
this.updateCTMCached = Utils.proxy(this.updateCTM, this)
// Create a custom requestAnimationFrame taking in account refreshRate
this.requestAnimationFrame = Utils.createRequestAnimationFrame(this.options.refreshRate)
// ViewBox
this.viewBox = {x: 0, y: 0, width: 0, height: 0}
this.cacheViewBox()
// Process CTM
var newCTM = this.processCTM()
// Update viewport CTM and cache zoom and pan
this.setCTM(newCTM)
// Update CTM in this frame
this.updateCTM()
}
/**
* Cache initial viewBox value
* If no viewBox is defined, then use viewport size/position instead for viewBox values
*/
ShadowViewport.prototype.cacheViewBox = function() {
var svgViewBox = this.options.svg.getAttribute('viewBox')
if (svgViewBox) {
var viewBoxValues = svgViewBox.split(/[\s\,]/).filter(function(v){return v}).map(parseFloat)
// Cache viewbox x and y offset
this.viewBox.x = viewBoxValues[0]
this.viewBox.y = viewBoxValues[1]
this.viewBox.width = viewBoxValues[2]
this.viewBox.height = viewBoxValues[3]
var zoom = Math.min(this.options.width / this.viewBox.width, this.options.height / this.viewBox.height)
// Update active state
this.activeState.zoom = zoom
this.activeState.x = (this.options.width - this.viewBox.width * zoom) / 2
this.activeState.y = (this.options.height - this.viewBox.height * zoom) / 2
// Force updating CTM
this.updateCTMOnNextFrame()
this.options.svg.removeAttribute('viewBox')
} else {
this.simpleViewBoxCache()
}
}
/**
* Recalculate viewport sizes and update viewBox cache
*/
ShadowViewport.prototype.simpleViewBoxCache = function() {
var bBox = this.viewport.getBBox()
this.viewBox.x = bBox.x
this.viewBox.y = bBox.y
this.viewBox.width = bBox.width
this.viewBox.height = bBox.height
}
/**
* Returns a viewbox object. Safe to alter
*
* @return {Object} viewbox object
*/
ShadowViewport.prototype.getViewBox = function() {
return Utils.extend({}, this.viewBox)
}
/**
* Get initial zoom and pan values. Save them into originalState
* Parses viewBox attribute to alter initial sizes
*
* @return {CTM} CTM object based on options
*/
ShadowViewport.prototype.processCTM = function() {
var newCTM = this.getCTM()
if (this.options.fit || this.options.contain) {
var newScale;
if (this.options.fit) {
newScale = Math.min(this.options.width/this.viewBox.width, this.options.height/this.viewBox.height);
} else {
newScale = Math.max(this.options.width/this.viewBox.width, this.options.height/this.viewBox.height);
}
newCTM.a = newScale; //x-scale
newCTM.d = newScale; //y-scale
newCTM.e = -this.viewBox.x * newScale; //x-transform
newCTM.f = -this.viewBox.y * newScale; //y-transform
}
if (this.options.center) {
var offsetX = (this.options.width - (this.viewBox.width + this.viewBox.x * 2) * newCTM.a) * 0.5
, offsetY = (this.options.height - (this.viewBox.height + this.viewBox.y * 2) * newCTM.a) * 0.5
newCTM.e = offsetX
newCTM.f = offsetY
}
// Cache initial values. Based on activeState and fix+center opitons
this.originalState.zoom = newCTM.a
this.originalState.x = newCTM.e
this.originalState.y = newCTM.f
return newCTM
}
/**
* Return originalState object. Safe to alter
*
* @return {Object}
*/
ShadowViewport.prototype.getOriginalState = function() {
return Utils.extend({}, this.originalState)
}
/**
* Return actualState object. Safe to alter
*
* @return {Object}
*/
ShadowViewport.prototype.getState = function() {
return Utils.extend({}, this.activeState)
}
/**
* Get zoom scale
*
* @return {Float} zoom scale
*/
ShadowViewport.prototype.getZoom = function() {
return this.activeState.zoom
}
/**
* Get zoom scale for pubilc usage
*
* @return {Float} zoom scale
*/
ShadowViewport.prototype.getRelativeZoom = function() {
return this.activeState.zoom / this.originalState.zoom
}
/**
* Compute zoom scale for pubilc usage
*
* @return {Float} zoom scale
*/
ShadowViewport.prototype.computeRelativeZoom = function(scale) {
return scale / this.originalState.zoom
}
/**
* Get pan
*
* @return {Object}
*/
ShadowViewport.prototype.getPan = function() {
return {x: this.activeState.x, y: this.activeState.y}
}
/**
* Return cached viewport CTM value that can be safely modified
*
* @return {SVGMatrix}
*/
ShadowViewport.prototype.getCTM = function() {
var safeCTM = this.options.svg.createSVGMatrix()
// Copy values manually as in FF they are not itterable
safeCTM.a = this.activeState.zoom
safeCTM.b = 0
safeCTM.c = 0
safeCTM.d = this.activeState.zoom
safeCTM.e = this.activeState.x
safeCTM.f = this.activeState.y
return safeCTM
}
/**
* Set a new CTM
*
* @param {SVGMatrix} newCTM
*/
ShadowViewport.prototype.setCTM = function(newCTM) {
var willZoom = this.isZoomDifferent(newCTM)
, willPan = this.isPanDifferent(newCTM)
if (willZoom || willPan) {
// Before zoom
if (willZoom) {
// If returns false then cancel zooming
if (this.options.beforeZoom(this.getRelativeZoom(), this.computeRelativeZoom(newCTM.a)) === false) {
newCTM.a = newCTM.d = this.activeState.zoom
willZoom = false
} else {
this.updateCache(newCTM);
this.options.onZoom(this.getRelativeZoom())
}
}
// Before pan
if (willPan) {
var preventPan = this.options.beforePan(this.getPan(), {x: newCTM.e, y: newCTM.f})
// If prevent pan is an object
, preventPanX = false
, preventPanY = false
// If prevent pan is Boolean false
if (preventPan === false) {
// Set x and y same as before
newCTM.e = this.getPan().x
newCTM.f = this.getPan().y
preventPanX = preventPanY = true
} else if (Utils.isObject(preventPan)) {
// Check for X axes attribute
if (preventPan.x === false) {
// Prevent panning on x axes
newCTM.e = this.getPan().x
preventPanX = true
} else if (Utils.isNumber(preventPan.x)) {
// Set a custom pan value
newCTM.e = preventPan.x
}
// Check for Y axes attribute
if (preventPan.y === false) {
// Prevent panning on x axes
newCTM.f = this.getPan().y
preventPanY = true
} else if (Utils.isNumber(preventPan.y)) {
// Set a custom pan value
newCTM.f = preventPan.y
}
}
// Update willPan flag
// Check if newCTM is still different
if ((preventPanX && preventPanY) || !this.isPanDifferent(newCTM)) {
willPan = false
} else {
this.updateCache(newCTM);
this.options.onPan(this.getPan());
}
}
// Check again if should zoom or pan
if (willZoom || willPan) {
this.updateCTMOnNextFrame()
}
}
}
ShadowViewport.prototype.isZoomDifferent = function(newCTM) {
return this.activeState.zoom !== newCTM.a
}
ShadowViewport.prototype.isPanDifferent = function(newCTM) {
return this.activeState.x !== newCTM.e || this.activeState.y !== newCTM.f
}
/**
* Update cached CTM and active state
*
* @param {SVGMatrix} newCTM
*/
ShadowViewport.prototype.updateCache = function(newCTM) {
this.activeState.zoom = newCTM.a
this.activeState.x = newCTM.e
this.activeState.y = newCTM.f
}
ShadowViewport.prototype.pendingUpdate = false
/**
* Place a request to update CTM on next Frame
*/
ShadowViewport.prototype.updateCTMOnNextFrame = function() {
if (!this.pendingUpdate) {
// Lock
this.pendingUpdate = true
// Throttle next update
this.requestAnimationFrame.call(window, this.updateCTMCached)
}
}
/**
* Update viewport CTM with cached CTM
*/
ShadowViewport.prototype.updateCTM = function() {
var ctm = this.getCTM()
// Updates SVG element
SvgUtils.setCTM(this.viewport, ctm, this.defs)
// Free the lock
this.pendingUpdate = false
// Notify about the update
if(this.options.onUpdatedCTM) {
this.options.onUpdatedCTM(ctm)
}
}
module.exports = function(viewport, options){
return new ShadowViewport(viewport, options)
}
},{"./svg-utilities":5,"./utilities":7}],4:[function(require,module,exports){
var Wheel = require('./uniwheel')
, ControlIcons = require('./control-icons')
, Utils = require('./utilities')
, SvgUtils = require('./svg-utilities')
, ShadowViewport = require('./shadow-viewport')
var SvgPanZoom = function(svg, options) {
this.init(svg, options)
}
var optionsDefaults = {
viewportSelector: '.svg-pan-zoom_viewport' // Viewport selector. Can be querySelector string or SVGElement
, panEnabled: true // enable or disable panning (default enabled)
, controlIconsEnabled: false // insert icons to give user an option in addition to mouse events to control pan/zoom (default disabled)
, zoomEnabled: true // enable or disable zooming (default enabled)
, dblClickZoomEnabled: true // enable or disable zooming by double clicking (default enabled)
, mouseWheelZoomEnabled: true // enable or disable zooming by mouse wheel (default enabled)
, preventMouseEventsDefault: true // enable or disable preventDefault for mouse events
, zoomScaleSensitivity: 0.1 // Zoom sensitivity
, minZoom: 0.5 // Minimum Zoom level
, maxZoom: 10 // Maximum Zoom level
, fit: true // enable or disable viewport fit in SVG (default true)
, contain: false // enable or disable viewport contain the svg (default false)
, center: true // enable or disable viewport centering in SVG (default true)
, refreshRate: 'auto' // Maximum number of frames per second (altering SVG's viewport)
, beforeZoom: null
, onZoom: null
, beforePan: null
, onPan: null
, customEventsHandler: null
, eventsListenerElement: null
, onUpdatedCTM: null
}
var passiveListenerOption = {passive: true};
SvgPanZoom.prototype.init = function(svg, options) {
var that = this
this.svg = svg
this.defs = svg.querySelector('defs')
// Add default attributes to SVG
SvgUtils.setupSvgAttributes(this.svg)
// Set options
this.options = Utils.extend(Utils.extend({}, optionsDefaults), options)
// Set default state
this.state = 'none'
// Get dimensions
var boundingClientRectNormalized = SvgUtils.getBoundingClientRectNormalized(svg)
this.width = boundingClientRectNormalized.width
this.height = boundingClientRectNormalized.height
// Init shadow viewport
this.viewport = ShadowViewport(SvgUtils.getOrCreateViewport(this.svg, this.options.viewportSelector), {
svg: this.svg
, width: this.width
, height: this.height
, fit: this.options.fit
, contain: this.options.contain
, center: this.options.center
, refreshRate: this.options.refreshRate
// Put callbacks into functions as they can change through time
, beforeZoom: function(oldScale, newScale) {
if (that.viewport && that.options.beforeZoom) {return that.options.beforeZoom(oldScale, newScale)}
}
, onZoom: function(scale) {
if (that.viewport && that.options.onZoom) {return that.options.onZoom(scale)}
}
, beforePan: function(oldPoint, newPoint) {
if (that.viewport && that.options.beforePan) {return that.options.beforePan(oldPoint, newPoint)}
}
, onPan: function(point) {
if (that.viewport && that.options.onPan) {return that.options.onPan(point)}
}
, onUpdatedCTM: function(ctm) {
if (that.viewport && that.options.onUpdatedCTM) {return that.options.onUpdatedCTM(ctm)}
}
})
// Wrap callbacks into public API context
var publicInstance = this.getPublicInstance()
publicInstance.setBeforeZoom(this.options.beforeZoom)
publicInstance.setOnZoom(this.options.onZoom)
publicInstance.setBeforePan(this.options.beforePan)
publicInstance.setOnPan(this.options.onPan)
publicInstance.setOnUpdatedCTM(this.options.onUpdatedCTM)
if (this.options.controlIconsEnabled) {
ControlIcons.enable(this)
}
// Init events handlers
this.lastMouseWheelEventTime = Date.now()
this.setupHandlers()
}
/**
* Register event handlers
*/
SvgPanZoom.prototype.setupHandlers = function() {
var that = this
, prevEvt = null // use for touchstart event to detect double tap
;
this.eventListeners = {
// Mouse down group
mousedown: function(evt) {
var result = that.handleMouseDown(evt, prevEvt);
prevEvt = evt
return result;
}
, touchstart: function(evt) {
var result = that.handleMouseDown(evt, prevEvt);
prevEvt = evt
return result;
}
// Mouse up group
, mouseup: function(evt) {
return that.handleMouseUp(evt);
}
, touchend: function(evt) {
return that.handleMouseUp(evt);
}
// Mouse move group
, mousemove: function(evt) {
return that.handleMouseMove(evt);
}
, touchmove: function(evt) {
return that.handleMouseMove(evt);
}
// Mouse leave group
, mouseleave: function(evt) {
return that.handleMouseUp(evt);
}
, touchleave: function(evt) {
return that.handleMouseUp(evt);
}
, touchcancel: function(evt) {
return that.handleMouseUp(evt);
}
}
// Init custom events handler if available
if (this.options.customEventsHandler != null) { // jshint ignore:line
this.options.customEventsHandler.init({
svgElement: this.svg
, eventsListenerElement: this.options.eventsListenerElement
, instance: this.getPublicInstance()
})
// Custom event handler may halt builtin listeners
var haltEventListeners = this.options.customEventsHandler.haltEventListeners
if (haltEventListeners && haltEventListeners.length) {
for (var i = haltEventListeners.length - 1; i >= 0; i--) {
if (this.eventListeners.hasOwnProperty(haltEventListeners[i])) {
delete this.eventListeners[haltEventListeners[i]]
}
}
}
}
// Bind eventListeners
for (var event in this.eventListeners) {
// Attach event to eventsListenerElement or SVG if not available
(this.options.eventsListenerElement || this.svg)
.addEventListener(event, this.eventListeners[event], !this.options.preventMouseEventsDefault ? passiveListenerOption : false)
}
// Zoom using mouse wheel
if (this.options.mouseWheelZoomEnabled) {
this.options.mouseWheelZoomEnabled = false // set to false as enable will set it back to true
this.enableMouseWheelZoom()
}
}
/**
* Enable ability to zoom using mouse wheel
*/
SvgPanZoom.prototype.enableMouseWheelZoom = function() {
if (!this.options.mouseWheelZoomEnabled) {
var that = this
// Mouse wheel listener
this.wheelListener = function(evt) {
return that.handleMouseWheel(evt);
}
// Bind wheelListener
var isPassiveListener = !this.options.preventMouseEventsDefault
Wheel.on(this.options.eventsListenerElement || this.svg, this.wheelListener, isPassiveListener)
this.options.mouseWheelZoomEnabled = true
}
}
/**
* Disable ability to zoom using mouse wheel
*/
SvgPanZoom.prototype.disableMouseWheelZoom = function() {
if (this.options.mouseWheelZoomEnabled) {
var isPassiveListener = !this.options.preventMouseEventsDefault
Wheel.off(this.options.eventsListenerElement || this.svg, this.wheelListener, isPassiveListener)
this.options.mouseWheelZoomEnabled = false
}
}
/**
* Handle mouse wheel event
*
* @param {Event} evt
*/
SvgPanZoom.prototype.handleMouseWheel = function(evt) {
if (!this.options.zoomEnabled || this.state !== 'none') {
return;
}
if (this.options.preventMouseEventsDefault){
if (evt.preventDefault) {
evt.preventDefault();
} else {
evt.returnValue = false;
}
}
// Default delta in case that deltaY is not available
var delta = evt.deltaY || 1
, timeDelta = Date.now() - this.lastMouseWheelEventTime
, divider = 3 + Math.max(0, 30 - timeDelta)
// Update cache
this.lastMouseWheelEventTime = Date.now()
// Make empirical adjustments for browsers that give deltaY in pixels (deltaMode=0)
if ('deltaMode' in evt && evt.deltaMode === 0 && evt.wheelDelta) {
delta = evt.deltaY === 0 ? 0 : Math.abs(evt.wheelDelta) / evt.deltaY
}
delta = -0.3 < delta && delta < 0.3 ? delta : (delta > 0 ? 1 : -1) * Math.log(Math.abs(delta) + 10) / divider
var inversedScreenCTM = this.svg.getScreenCTM().inverse()
, relativeMousePoint = SvgUtils.getEventPoint(evt, this.svg).matrixTransform(inversedScreenCTM)
, zoom = Math.pow(1 + this.options.zoomScaleSensitivity, (-1) * delta); // multiplying by neg. 1 so as to make zoom in/out behavior match Google maps behavior
this.zoomAtPoint(zoom, relativeMousePoint)
}
/**
* Zoom in at a SVG point
*
* @param {SVGPoint} point
* @param {Float} zoomScale Number representing how much to zoom
* @param {Boolean} zoomAbsolute Default false. If true, zoomScale is treated as an absolute value.
* Otherwise, zoomScale is treated as a multiplied (e.g. 1.10 would zoom in 10%)
*/
SvgPanZoom.prototype.zoomAtPoint = function(zoomScale, point, zoomAbsolute) {
var originalState = this.viewport.getOriginalState()
if (!zoomAbsolute) {
// Fit zoomScale in set bounds
if (this.getZoom() * zoomScale < this.options.minZoom * originalState.zoom) {
zoomScale = (this.options.minZoom * originalState.zoom) / this.getZoom()
} else if (this.getZoom() * zoomScale > this.options.maxZoom * originalState.zoom) {
zoomScale = (this.options.maxZoom * originalState.zoom) / this.getZoom()
}
} else {
// Fit zoomScale in set bounds
zoomScale = Math.max(this.options.minZoom * originalState.zoom, Math.min(this.options.maxZoom * originalState.zoom, zoomScale))
// Find relative scale to achieve desired scale
zoomScale = zoomScale/this.getZoom()
}
var oldCTM = this.viewport.getCTM()
, relativePoint = point.matrixTransform(oldCTM.inverse())
, modifier = this.svg.createSVGMatrix().translate(relativePoint.x, relativePoint.y).scale(zoomScale).translate(-relativePoint.x, -relativePoint.y)
, newCTM = oldCTM.multiply(modifier)
if (newCTM.a !== oldCTM.a) {
this.viewport.setCTM(newCTM)
}
}
/**
* Zoom at center point
*
* @param {Float} scale
* @param {Boolean} absolute Marks zoom scale as relative or absolute
*/
SvgPanZoom.prototype.zoom = function(scale, absolute) {
this.zoomAtPoint(scale, SvgUtils.getSvgCenterPoint(this.svg, this.width, this.height), absolute)
}
/**
* Zoom used by public instance
*
* @param {Float} scale
* @param {Boolean} absolute Marks zoom scale as relative or absolute
*/
SvgPanZoom.prototype.publicZoom = function(scale, absolute) {
if (absolute) {
scale = this.computeFromRelativeZoom(scale)
}
this.zoom(scale, absolute)
}
/**
* Zoom at point used by public instance
*
* @param {Float} scale
* @param {SVGPoint|Object} point An object that has x and y attributes
* @param {Boolean} absolute Marks zoom scale as relative or absolute
*/
SvgPanZoom.prototype.publicZoomAtPoint = function(scale, point, absolute) {
if (absolute) {
// Transform zoom into a relative value
scale = this.computeFromRelativeZoom(scale)
}
// If not a SVGPoint but has x and y then create a SVGPoint
if (Utils.getType(point) !== 'SVGPoint') {
if('x' in point && 'y' in point) {
point = SvgUtils.createSVGPoint(this.svg, point.x, point.y)
} else {
throw new Error('Given point is invalid')
}
}
this.zoomAtPoint(scale, point, absolute)
}
/**
* Get zoom scale
*
* @return {Float} zoom scale
*/
SvgPanZoom.prototype.getZoom = function() {
return this.viewport.getZoom()
}
/**
* Get zoom scale for public usage
*
* @return {Float} zoom scale
*/
SvgPanZoom.prototype.getRelativeZoom = function() {
return this.viewport.getRelativeZoom()
}
/**
* Compute actual zoom from public zoom
*
* @param {Float} zoom
* @return {Float} zoom scale
*/
SvgPanZoom.prototype.computeFromRelativeZoom = function(zoom) {
return zoom * this.viewport.getOriginalState().zoom
}
/**
* Set zoom to initial state
*/
SvgPanZoom.prototype.resetZoom = function() {
var originalState = this.viewport.getOriginalState()
this.zoom(originalState.zoom, true);
}
/**
* Set pan to initial state
*/
SvgPanZoom.prototype.resetPan = function() {
this.pan(this.viewport.getOriginalState());
}
/**
* Set pan and zoom to initial state
*/
SvgPanZoom.prototype.reset = function() {
this.resetZoom()
this.resetPan()
}
/**
* Handle double click event
* See handleMouseDown() for alternate detection method
*
* @param {Event} evt
*/
SvgPanZoom.prototype.handleDblClick = function(evt) {
if (this.options.preventMouseEventsDefault) {
if (evt.preventDefault) {
evt.preventDefault()
} else {
evt.returnValue = false
}
}
// Check if target was a control button
if (this.options.controlIconsEnabled) {
var targetClass = evt.target.getAttribute('class') || ''
if (targetClass.indexOf('svg-pan-zoom-control') > -1) {
return false
}
}
var zoomFactor
if (evt.shiftKey) {
zoomFactor = 1/((1 + this.options.zoomScaleSensitivity) * 2) // zoom out when shift key pressed
} else {
zoomFactor = (1 + this.options.zoomScaleSensitivity) * 2
}
var point = SvgUtils.getEventPoint(evt, this.svg).matrixTransform(this.svg.getScreenCTM().inverse())
this.zoomAtPoint(zoomFactor, point)
}
/**
* Handle click event
*
* @param {Event} evt
*/
SvgPanZoom.prototype.handleMouseDown = function(evt, prevEvt) {
if (this.options.preventMouseEventsDefault) {
if (evt.preventDefault) {
evt.preventDefault()
} else {
evt.returnValue = false
}
}
Utils.mouseAndTouchNormalize(evt, this.svg)
// Double click detection; more consistent than ondblclick
if (this.options.dblClickZoomEnabled && Utils.isDblClick(evt, prevEvt)){
this.handleDblClick(evt)
} else {
// Pan mode
this.state = 'pan'
this.firstEventCTM = this.viewport.getCTM()
this.stateOrigin = SvgUtils.getEventPoint(evt, this.svg).matrixTransform(this.firstEventCTM.inverse())
}
}
/**
* Handle mouse move event
*
* @param {Event} evt
*/
SvgPanZoom.prototype.handleMouseMove = function(evt) {
if (this.options.preventMouseEventsDefault) {
if (evt.preventDefault) {
evt.preventDefault()
} else {
evt.returnValue = false
}
}
if (this.state === 'pan' && this.options.panEnabled) {
// Pan mode
var point = SvgUtils.getEventPoint(evt, this.svg).matrixTransform(this.firstEventCTM.inverse())
, viewportCTM = this.firstEventCTM.translate(point.x - this.stateOrigin.x, point.y - this.stateOrigin.y)
this.viewport.setCTM(viewportCTM)
}
}
/**
* Handle mouse button release event
*
* @param {Event} evt
*/
SvgPanZoom.prototype.handleMouseUp = function(evt) {
if (this.options.preventMouseEventsDefault) {
if (evt.preventDefault) {
evt.preventDefault()
} else {
evt.returnValue = false
}
}
if (this.state === 'pan') {
// Quit pan mode
this.state = 'none'
}
}
/**
* Adjust viewport size (only) so it will fit in SVG
* Does not center image
*/
SvgPanZoom.prototype.fit = function() {
var viewBox = this.viewport.getViewBox()
, newScale = Math.min(this.width/viewBox.width, this.height/viewBox.height)
this.zoom(newScale, true)
}
/**
* Adjust viewport size (only) so it will contain the SVG
* Does not center image