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zwavegraph3.js
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zwavegraph3.js
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/*
https://github.com/AdamNaj/ZWaveGraphHA
Old: https://gist.github.com/AdamNaj/cbf4d792a22f443fe9d354e4dca4de00
Version 1.0:
- based on the brilliant code by @NigelL - with cosmetic changes mostly about clarity and shaping of nodes based on their function
Version 2.0: (02 July 2019)
- you can now pan the graph by dragging it
- you can now zoom the graph with your mouse wheel
- the graph initially is scaled to fill the full screen width
- added minimap to visualize which part of the graph you can see at the oment on the screen
- added 2 more tree layouts (click on the top-legend) - they didn't necessarily help me make the graph more manageable for me, but may be useful to others in their topology
- added the ability to show all node connections if someone wants to see the full picture of their Z-Wave mesh
- fixed the broken new line in the node tooltips
- you can now click on the node to see the entity dialog
Version 2.1: (20 September 2019)
- added Tools to graph legends so you can easily navigate to Z-Wave Network Management
- fixed (hopefully) the problem with the graph requiring page reload then navigating to it
Version 2.2: (04 October 2019)
- ability to turn off node grouping. Having the nodes grouped requires editing locations defined in the zwcfg_*.cfg
Version 2.3: (03 February 2020)
- Graph background reflects theme background color after page reload
- Fixed problem where some removed nodes lingering in the device registry could cause wrong node info card to be displayed after clicking on nodes with higher ids
Version 3.0: (21 September 2020)
- restructure to accomodate for a breaking change in Home Assistant 0.115
- default graph ranker, edge visibility and grouping settings are now customizable in configuration.yaml
- move from Gist to GitHub - Pull Requests are welcome :)
Version 3.1: (07 October 2020)
- Fix for Javscript Error in Log, blank screen - "Uncaught SyntaxError: Unexpected token '<'" (hopefully)
- Added 'tap' and 'touchstart' event for mobile devices. (Thank you @dennykorsukewitz!)
- Changed the colors of legends and sub legends. #DarkMode (Thank you @dennykorsukewitz!)
Version 3.2: (08 October 2020)
- Pinch to zoom added for the benefit of mobile device users
- Touch has been made somewhat less eager to open the More Info dialog. Doesn't happen on touch start but rather on tap. Otherwise pinch-to-zoom was somewhat of a nightmare.
*/
import {
LitElement,
html,
css,
} from "https://unpkg.com/lit-element@2.4.0/lit-element.js?module";
import "https://d3js.org/d3.v5.min.js";
import "https://cdnjs.cloudflare.com/ajax/libs/dagre-d3/0.6.1/dagre-d3.js";
import "https://cdn.jsdelivr.net/npm/svg-pan-zoom@3.5.0/dist/svg-pan-zoom.min.js";
import "https://hammerjs.github.io/dist/hammer.min.js"
class ZWaveGraphPanel extends LitElement {
static get properties() {
return {
hass: {
type: Object
},
narrow: {
type: Boolean
},
route: {
type: Object
},
panel: {
type: Object
},
};
}
getHtmlTemplate = function () {
var template = this.render();
return template.getHTML();
}
render() {
return html `
<div id="content" class="content" style="background: var(--primary-background-color);">
<svg id="svg" width="100%" height="100%"></svg>
<svg id="scopeContainer" class="thumb">
<g>
<rect id="scope" fill="red" fill-opacity="0.03" stroke="red" stroke-width="1px" stroke-opacity="0.3" x="0"
y="0" width="0" height="0" />
<line id="line1" stroke="red" stroke-width="1px" x1="0" y1="0" x2="0" y2="0" />
<line id="line2" stroke="red" stroke-width="1px" x1="0" y1="0" x2="0" y2="0" />
</g>
</svg>
<svg id="miniSvg" class="thumb" style="background: var(--primary-background-color);"></svg>
</div>
`;
}
static get styles() {
return css `
:host {
background-color: #0a0a0a;
padding: 16px;
display: block;
}
.thumb {
border: 1px solid #ddd;
position: absolute;
bottom: 5px;
right: 5px;
margin: 1px;
padding: 1px;
overflow: hidden;
}
#miniSvg {
z-index: 110;
background: white;
}
#scopeContainer {
z-index: 120;
}
.content {
overflow: hidden;
position: absolute;
left: 0px;
top: 64px;
bottom: 0px;
right: 0px;
padding: 8px;
}
svg>.output {
fill: #3598DB;
stroke: #2470A2;
}
.node>rect {
stroke: black;
}
.node.layer-1>rect,
.edgePath.layer-1>path {
fill: #3598DB;
stroke: #2470A2;
}
.node.layer-1>polygon,
.node.layer-1>rect,
.edgePath.layer-1>path {
fill: #3598DB;
stroke: #2470A2;
}
.node.layer-1 text {
fill: #1E5B84;
}
.node.layer-2>polygon,
.node.layer-2>rect,
.edgePath.layer-2>path {
stroke: #1D8548;
}
.node.layer-2>rect,
.edgePath.layer-2>path {
fill: #1BBC9B;
}
.node.layer-2 text {
fill: #11512C;
}
.node.layer-3>polygon,
.node.layer-3>rect,
.edgePath.layer-3>path {
stroke: #1D8548;
}
.node.layer-3>rect,
.edgePath.layer-3>path {
fill: #2DCC70;
}
.node.layer-3 text {
fill: #1D8548;
}
.node.layer-4>polygon,
.node.layer-4>rect,
.edgePath.layer-4>path {
stroke: #D25400;
}
.node.layer-4>rect,
.edgePath.layer-4>path {
fill: #F1C40F;
}
.node.layer-5>polygon,
.node.layer-4 text {
fill: #D25400;
}
.node.layer-5>polygon,
.node.layer-5>rect,
.edgePath.layer-5>path {
stroke: #D25400;
}
.node.layer-5>rect,
.edgePath.layer-5>path {
fill: #E77E23;
}
.node.layer-5 text {
fill: #D25400;
}
.node.Error>polygon,
.node.Error>rect {
fill: #ff7676;
stroke: darkred;
}
.node.Error text {
fill: darkred;
}
.node.unset>rect {
stroke: #666;
}
.node.unset>polygon,
.node.unset>rect {
stroke: #666;
fill: lightgray;
}
.cluster>rect {
stroke: lightgray;
fill: #f8f8f8;
stroke-width: 1px;
stroke-linecap: round;
}
.cluster>.label {
/* stroke: gray; */
fill: lightgray;
}
.node.unset text {
fill: #666;
}
.node text {
font-size: 12px;
}
.edgePath.layer-1>path {
fill: transparent;
}
.edgePath path {
stroke: #333;
fill: #333;
}
.node>polygon {
opacity: 0.7;
}
.node>rect {
stroke-width: 1px;
stroke-linecap: round;
}
`;
}
firstUpdated() {
// Give the browser a chance to paint then create the graph
var that = this;
setTimeout(function () {
that.paintGraph(that.panel.config.ranker, that.panel.config.edge_visibility, that.panel.config.grouping);
}, 100);
}
paintGraph(ranker, edgeVisibility, grouping) {
var legends = [{
shape: "rect",
color: "#3598DB",
stroke: "#2470A2",
textcolor: "#2470A2",
text: "Hub"
},
{
shape: "rect",
color: "#1BBC9B",
stroke: "#1D8548",
textcolor: "#11512C",
text: "1 hop"
},
{
shape: "rect",
color: "#2DCC70",
stroke: "#1D8548",
textcolor: "#1D8548",
text: "2 hops"
},
{
shape: "rect",
color: "#F1C40F",
stroke: "#D25400",
textcolor: "#D25400",
text: "3 hops"
},
{
shape: "rect",
color: "E77E23",
stroke: "#D25400",
textcolor: "#D25400",
text: "4 hops"
},
{
shape: "rect",
color: "crimson",
stroke: "darkred",
textcolor: "darkred",
text: "Failed Node"
},
{
shape: "rect",
color: "lightgray",
stroke: "#666666",
textcolor: "#666666",
text: "Unconnected"
}
];
var layout = [{
shape: "rect",
color: "var(--primary-color)",
stroke: "#2470A2",
textcolor: "var(--primary-color)",
text: "Network Simplex",
ranker: "network-simplex",
cursor: "pointer"
},
{
shape: "rect",
color: "var(--primary-color)",
stroke: "#2470A2",
textcolor: "var(--primary-color)",
text: "Tight Tree",
ranker: "tight-tree",
cursor: "pointer"
},
{
shape: "rect",
color: "var(--primary-color)",
stroke: "#2470A2",
textcolor: "var(--primary-color)",
text: "Longest Path",
ranker: "longest-path",
cursor: "pointer"
}
];
var edgesLegend = [{
shape: "rect",
color: "var(--primary-color)",
stroke: "#2470A2",
textcolor: "var(--primary-color)",
text: "Relevant Neighbors",
edges: "relevant",
cursor: "pointer"
},
{
shape: "rect",
color: "var(--primary-color)",
stroke: "#2470A2",
textcolor: "var(--primary-color)",
text: "All Neighbors",
edges: "all",
cursor: "pointer"
}
];
var groupingLegend = [{
shape: "rect",
color: "var(--primary-color)",
stroke: "#2470A2",
textcolor: "var(--primary-color)",
text: "Z-Wave Locations",
grouping: "z-wave",
cursor: "pointer"
},
{
shape: "rect",
color: "var(--primary-color)",
stroke: "#2470A2",
textcolor: "var(--primary-color)",
text: "Ungrouped",
grouping: "ungrouped",
cursor: "pointer"
}
];
var links = [{
shape: "rect",
color: "var(--primary-color)",
stroke: "#2470A2",
textcolor: "var(--primary-color)",
text: "Network Management",
cursor: "hand",
url: "/config/zwave",
}, ];
this.$ = this.shadowRoot.querySelector("#content");
this.$.svg = this.shadowRoot.querySelector("#svg");
this.$.miniSvg = this.shadowRoot.querySelector("#miniSvg");
this.$.scope = this.shadowRoot.querySelector("#scope");
this.$.scopeContainer = this.shadowRoot.querySelector("#scopeContainer");
this.$.svg.innerHTML = "";
this.$.miniSvg.innerHTML = "";
this.ranker = ranker;
this.edgeVisibility = edgeVisibility;
this.grouping = grouping;
var data = this.listNodes(this.hass);
var g = new dagreD3.graphlib.Graph({
compound: true
}).setGraph({});
g.graph().rankDir = "BT";
//g.graph().rankDir = 'RL';
g.graph().nodesep = 10;
g.graph().ranker = ranker;
// Create the renderer
var render = new dagreD3.render();
var svg = d3.select(this.$.svg);
var inner = svg.append("g").attr("transform", "translate(20,200)scale(1)");
g.graph().minlen = 0;
// Add our custom shape (a house)
render.shapes().house = this.renderHouse;
render.shapes().battery = this.renderBattery;
var groups = [];
var nodes = data["nodes"];
// Set the parents to define which nodes belong to which cluster
// add nodes to graph
for (var i = 0; i < nodes.length; i++) {
var node = nodes[i];
g.setNode(node.id, node);
if (this.grouping !== "ungrouped" && node.location != "" && node.location != undefined) {
g.setNode(node.location, {
label: node.location,
clusterLabelPos: 'bottom',
class: "group",
entityId: node.entity_id
});
g.setParent(node.id, node.location);
}
}
// add edges to graph
for (var i = 0; i < data["edges"].length; i++) {
var edge = g.setEdge(
data["edges"][i].from,
data["edges"][i].to, {
label: "",
arrowhead: "undirected",
style: data["edges"][i].style,
class: data["edges"][i].class,
curve: d3.curveBundle.beta(0.2)
//curve: d3.curveBasis
})
}
// Run the renderer. This is what draws the final graph.
render(inner, g);
// create battery state gradients
for (let layer = 0; layer < legends.length; layer++) {
for (let percent = 0; percent <= 100; percent += 10) {
var grad = svg.append("defs").append("linearGradient").attr("id", "fill-" + (layer + 1) + "-" + percent)
.attr("x1", "0%").attr("x2", "0%").attr("y1", "0%").attr("y2", "100%");
grad.append("stop").attr("offset", (100 - percent - 10) + "%").style("stop-color", "white");
grad.append("stop").attr("offset", (100 - percent) + "%").style("stop-color", legends[layer].color);
}
}
// Add the title element to be used for a tooltip (SVG functionality)
inner.selectAll("g.node")
.append("title").html(function (d) {
return g.node(d).title;
});
inner.selectAll("g.node")
.attr("layer", function (d) {
return g.node(d).layer;
})
.attr("fill", function (d) {
if (g.node(d).battery_level === 100) {
return "url(#fill-" + g.node(d).layer + "-100)";
}
if (g.node(d).battery_level !== undefined) {
return "url(#fill-" + g.node(d).layer + "-" + Math.floor(g.node(d).battery_level / 10 % 10) + "0)";
}
});
inner.selectAll("g.edgePath")
.attr("layer", function (d) {
return g.edges(d).layer;
});
var that = this;
var handleClick = function (d, i, nodeList) { // Add interactivity
var nodeId = nodeList[i].id;
var node = nodes.find(function (element) {
return element.id == nodeId;
});
that.fire('hass-more-info', {
entityId: node.entity_id
});
};
// append handlers
svg.selectAll(".node")
.on("mouseover", this.handleMouseOver)
.on("mouseout", this.handleMouseOut)
.on("click tap", handleClick);
this.addLegend(this.$, svg, legends, 5, 20, "Node Colors", ranker, this.edgeVisibility, this.grouping);
this.addLegend(this.$, svg, layout, 150, 20, "Tree Layout", ranker, this.edgeVisibility, this.grouping);
this.addLegend(this.$, svg, edgesLegend, 320, 20, "Neighbors", ranker, this.edgeVisibility, this.grouping);
this.addLegend(this.$, svg, groupingLegend, 510, 20, "Grouping", ranker, this.edgeVisibility, this.grouping);
this.addLegend(this.$, svg, links, 700, 20, "Tools", ranker, this.edgeVisibility, this.grouping);
this.$.miniSvg.innerHTML = this.$.svg.innerHTML;
this.bindThumbnail(this.$);
}
listNodes(hass) {
let states = new Array();
for (let state in hass.states) {
states.push({
name: state,
entity: hass.states[state]
});
}
let zwaves = states.filter((s) => {
return s.name.indexOf("zwave.") == 0 && s.entity.attributes["capabilities"] !== undefined
});
let result = {
"edges": [],
"nodes": []
};
let hubNode = 0;
let neighbors = {};
for (let b in zwaves) {
let id = zwaves[b].entity.attributes["node_id"];
let node = zwaves[b].entity;
if (node.attributes["capabilities"].filter(
(s) => {
return s == "primaryController"
}).length > 0) {
hubNode = id;
}
neighbors[id] = node.attributes['neighbors'];
let entities = states.filter((s) => {
return ((s.name.indexOf("zwave.") == -1) &&
(s.entity.attributes["node_id"] == id))
});
let batlev = node.attributes.battery_level;
// create node
let entity = {
"id": id,
"entity_id": node.entity_id,
"label": "[" + id + (node.attributes["is_zwave_plus"] ? "+" : "") + "] " + (node.attributes[
"friendly_name"] + " (" + node.attributes["averageResponseRTT"] + "ms)").replace(/ /g, "\n"),
"class": "unset layer-7",
"layer": 7,
"rx": "6",
"ry": "6",
"neighbors": neighbors[id],
"battery_level": batlev,
"mains": batlev,
"location": node.attributes["location"],
"failed": node.attributes["is_failed"],
"title": "<b>" + node.attributes["node_name"] + "</b>\n" +
"\n Entity ID: " + node.entity_id +
"\n Node: " + id + (node.attributes["is_zwave_plus"] ? "+" : "") +
"\n Product Name: " + node.attributes["product_name"] +
"\n Average Request RTT: " + node.attributes["averageResponseRTT"] + "ms" +
"\n Power source: " + (batlev != undefined ? "battery (" + batlev + "%)" : "mains") +
"\n " + entities.length + " entities" +
"\n Neighbors: " + node.attributes['neighbors'],
"forwards": (node.attributes.is_awake && node.attributes.is_ready && !node.attributes.is_failed &&
node.attributes.capabilities.includes("listening")),
};
entity["shape"] = id === hubNode ? "house" : (entity.forwards || batlev === undefined ? "rect" : "battery");
if (node.attributes["is_failed"]) {
entity.label = "FAILED: " + entity.label;
entity["font.multi"] = true;
entity["title"] = "<b>FAILED: </b>" + entity.title;
entity["group"] = "Failed";
entity["failed"] = true;
entity["class"] = "Error";
}
if (hubNode == id) {
entity.label = "ZWave Hub";
entity.borderWidth = 2;
entity.fixed = true;
}
result.nodes.push(entity);
}
if (hubNode > 0) {
let layer = 0;
let previousRow = [hubNode];
let mappedNodes = [hubNode];
let layers = [];
while (previousRow.length > 0) {
layer = layer + 1;
let nextRow = [];
let layerMembers = []
layers[layer] = layerMembers;
for (let target in previousRow) {
// assign node to layer
result.nodes.filter((n) => {
return ((n.id == previousRow[target]) && (n.group = "unset"))
})
.every((d) => {
d.class = "layer-" + layer;
d.layer = layer;
if (d.failed) {
d.class = d.class + " Error"
}
if (d.neighbors !== undefined) {
d.neighbors.forEach((n) => {
d.class = d.class + " neighbor-" + n
});
}
})
if (result.nodes.filter((n) => {
return ((n.id == previousRow[target]) && (n.forwards))
}).length > 0) {
let row = neighbors[previousRow[target]];
for (let node in row) {
if (neighbors[row[node]] !== undefined) {
if (!mappedNodes.includes(row[node])) {
layerMembers.push(row[node]);
result.edges.push({
"from": row[node],
"to": previousRow[target],
"style": "",
"class": "layer-" + (layer + 1) + " node-" + row[node] + " node-" + previousRow[target],
"layer": layer,
});
nextRow.push(row[node]);
} else {
// uncomment to show edges regardless of rows - mess!
if (this.edgeVisibility === "all") {
result.edges.push({
"from": row[node],
"to": previousRow[target],
"style": "stroke-dasharray: 5, 5; fill:transparent; ", //"stroke: #ddd; stroke-width: 1px; fill:transparent; stroke-dasharray: 5, 5;",
"class": "layer-" + (layer + 1) + " node-" + row[node] + " node-" + previousRow[target]
});
}
}
}
}
}
}
for (let idx in nextRow) {
mappedNodes.push(nextRow[idx]);
}
previousRow = nextRow;
}
}
return result;
}
// Add our custom shape (a house)
renderHouse(parent, bbox, node) {
var w = bbox.width,
h = bbox.height,
points = [{
x: 0,
y: 0
},
{
x: w,
y: 0
},
{
x: w,
y: -h
},
{
x: w / 2,
y: -h * 3 / 2
},
{
x: 0,
y: -h
}
],
shapeSvg = parent.insert("polygon", ":first-child")
.attr("points", points.map(function (d) {
return d.x + "," + d.y;
}).join(" "))
.attr("transform", "translate(" + (-w / 2) + "," + (h * 3 / 4) + ")");
node.intersect = function (point) {
return dagreD3.intersect.polygon(node, points, point);
};
return shapeSvg;
};
renderBattery(parent, bbox, node) {
var w = bbox.width,
h = bbox.height,
points = [{
x: 0,
y: 0
}, // bottom left
{
x: w,
y: 0
}, // bottom line
{
x: w,
y: -h
}, // right line
{
x: w * 7 / 10,
y: -h
}, // top right
{
x: w * 7 / 10,
y: -h * 20 / 17
}, // battery tip - right
{
x: w * 3 / 10,
y: -h * 20 / 17
}, // battery tip
{
x: w * 3 / 10,
y: -h
}, // battery tip - left
{
x: 0,
y: -h
}, // top left
{
x: 0,
y: -h
} // left line
],
shapeSvg = parent.insert("polygon", ":first-child")
.attr("points", points.map(function (d) {
return d.x + "," + d.y;
}).join(" "))
.attr("transform", "translate(" + (-w / 2) + "," + (h * 2 / 4) + ")");
node.intersect = function (point) {
return dagreD3.intersect.polygon(node, points, point);
};
return shapeSvg;
};
handleMouseOver(d, i, nodeList) { // Add interactivity
var svg;
for (let nodeNum in nodeList) {
let node = nodeList[nodeNum];
if (node.style !== undefined && node.id !== d) {
node.style.opacity = 0.1;
svg = node.ownerSVGElement
}
}
// Use D3 to select element, change color and size
svg.querySelectorAll(".edgePath")
.forEach(function (node) {
node.style.opacity = "0.3"
});
var edges = svg.querySelectorAll(".edgePath.node-" + d);
for (let i = 0; i < edges.length; i++) {
edges[i].style.opacity = "1"
edges[i].style['stroke-width'] = "2";
};
var neighbors = svg.querySelectorAll(".node.neighbor-" + d);
for (let i = 0; i < neighbors.length; i++) {
neighbors[i].style.opacity = "0.7"
};
};
handleMouseOut(d, i, nodeList) { // Add interactivity
var svg;
for (let nodeNum in nodeList) {
let node = nodeList[nodeNum];
if (node.style !== undefined && node.id !== d) {
node.style.opacity = 1;
svg = node.ownerSVGElement
}
}
// Use D3 to select element, change color and size
svg.querySelectorAll(".edgePath")
.forEach(function (node) {
node.style.opacity = "1";
node.style['stroke-width'] = "1";
});
};
addLegend($, svg, legends, startX, startY, title, ranker, edges, grouping) {
var that = this;
var handleClick = function (d, i, nodeList) {
if (nodeList[0].dataset.url !== undefined) {
window.location = nodeList[0].dataset.url;
}
var ranker = nodeList[0].dataset.ranker || that.ranker;
var edges = nodeList[0].dataset.edges || that.edgeVisibility;
var grouping = nodeList[0].dataset.grouping || that.grouping;
svg.selectAll("*").remove();
$.innerHTML = that.getHtmlTemplate();
that.paintGraph(ranker, edges, grouping);
}
var shape = svg.append('text')
.attr('x', startX)
.attr('y', startY + 5)
.text(title)
.attr('width', 10)
.attr('height', 10)
.style("fill", "var(--accent-color)")
.style("font-weight", "800");
for (var counter = 0; counter < legends.length; counter++) {
var isLink = legends[counter].url !== undefined;
if (isLink) {
var text = svg.append('text')
.attr("x", startX)
.attr("y", startY + 10 + 20 * (counter + 1))
.attr("class", "textselected")
.attr('data-url', legends[counter].url)
.text(legends[counter].text)
.style("text-anchor", "start")
.style("fill", legends[counter].textcolor)
.style("font-size", 15)
.style("text-decoration", "underline")
.style("cursor", legends[counter].cursor)
.on("click tap", handleClick);
} else {
var shape = svg.append(legends[counter].shape)
.attr('x', startX)
.attr('y', startY + 20 * (counter + 1))
.attr('width', 10)
.attr('height', 10)
.style("stroke", legends[counter].stroke)
.style("fill", legends[counter].color)
.style("cursor", legends[counter].cursor);
var text = svg.append('text')
.attr("x", startX + 20)
.attr("y", startY + 10 + 20 * (counter + 1))
.attr("class", "textselected")
.text(legends[counter].text)
.style("text-anchor", "start")
.style("fill", legends[counter].textcolor)
.style("font-size", 15)
.style("cursor", legends[counter].cursor);
var dataLabel, dataValue, dataState;
if (legends[counter].ranker) {
dataLabel = 'data-ranker';
dataValue = legends[counter].ranker;
dataState = ranker;
}
if (legends[counter].edges) {
dataLabel = 'data-edges';
dataValue = legends[counter].edges;
dataState = edges;
}
if (legends[counter].grouping) {
dataLabel = 'data-grouping';
dataValue = legends[counter].grouping;
dataState = grouping;
}
if (dataLabel !== undefined) {
shape.attr(dataLabel, dataValue)
.on("click tap", handleClick);
text.attr(dataLabel, dataValue)
.on("click tap", handleClick);
if (dataValue !== dataState) {
shape.style("fill", "transparent");
}
}
}
}
}
mainEventsHandler = {
haltEventListeners: ['touchstart', 'touchend', 'touchmove', 'touchleave', 'touchcancel'],
init: function (options) {
var instance = options.instance,
initialScale = 1,
pannedX = 0,
pannedY = 0
// Init Hammer
// Listen only for pointer and touch events
this.hammer = Hammer(options.svgElement, {
inputClass: Hammer.SUPPORT_POINTER_EVENTS ? Hammer.PointerEventInput : Hammer.TouchInput
})
// Enable pinch
this.hammer.get('pinch').set({
enable: true
})
// Handle double tap
this.hammer.on('doubletap', function (ev) {
instance.zoomIn()
})
// Handle pan
this.hammer.on('panstart panmove', function (ev) {
// On pan start reset panned variables
if (ev.type === 'panstart') {
pannedX = 0
pannedY = 0
}
// Pan only the difference
instance.panBy({
x: ev.deltaX - pannedX,
y: ev.deltaY - pannedY
})
pannedX = ev.deltaX
pannedY = ev.deltaY
})
// Handle pinch