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svg-pan-zoom.js
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svg-pan-zoom.js
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// svg-pan-zoom v3.6.2
// https://github.com/bumbu/svg-pan-zoom
(function(){function r(e,n,t){function o(i,f){if(!n[i]){if(!e[i]){var c="function"==typeof require&&require;if(!f&&c)return c(i,!0);if(u)return u(i,!0);var a=new Error("Cannot find module '"+i+"'");throw a.code="MODULE_NOT_FOUND",a}var p=n[i]={exports:{}};e[i][0].call(p.exports,function(r){var n=e[i][1][r];return o(n||r)},p,p.exports,r,e,n,t)}return n[i].exports}for(var u="function"==typeof require&&require,i=0;i<t.length;i++)o(t[i]);return o}return r})()({1:[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));
// Finally append created element
instance.svg.appendChild(zoomGroup);
// Cache control instance
instance.controlIcons = zoomGroup;
},
_createZoomIn: function(instance) {
var zoomIn = document.createElementNS(SvgUtils.svgNS, "g");
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.createElementNS(SvgUtils.svgNS, "g");
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}],2:[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}],3:[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}],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
// eslint-disable-next-line eqeqeq
if (this.options.customEventsHandler != null) {
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