metamaps--metamaps/app/assets/javascripts/Jit/ForceDirected/metamapFD.js

323 lines
13 KiB
JavaScript

var labelType, useGradients, nativeTextSupport, animate, json, fd;
(function() {
var ua = navigator.userAgent,
iStuff = ua.match(/iPhone/i) || ua.match(/iPad/i),
typeOfCanvas = typeof HTMLCanvasElement,
nativeCanvasSupport = (typeOfCanvas == 'object' || typeOfCanvas == 'function'),
textSupport = nativeCanvasSupport
&& (typeof document.createElement('canvas').getContext('2d').fillText == 'function');
//I'm setting this based on the fact that ExCanvas provides text support for IE
//and that as of today iPhone/iPad current text support is lame
labelType = (!nativeCanvasSupport || (textSupport && !iStuff))? 'Native' : 'HTML';
nativeTextSupport = labelType == 'Native';
useGradients = nativeCanvasSupport;
animate = !(iStuff || !nativeCanvasSupport);
})();
var imgArray = new Object();
imgArray['Group'] = new Image(); imgArray['Group'].src = '/assets/group.png';
imgArray['Person'] = new Image(); imgArray['Person'].src = '/assets/person.png';
imgArray['Bizarre'] = new Image(); imgArray['Bizarre'].src = '/assets/bizarre.png';
imgArray['Catalyst'] = new Image(); imgArray['Catalyst'].src = '/assets/catalyst.png';
imgArray['Closed'] = new Image(); imgArray['Closed'].src = '/assets/closed.png';
imgArray['Experience'] = new Image(); imgArray['Experience'].src = '/assets/experience.png';
imgArray['Future Dev'] = new Image(); imgArray['Future Dev'].src = '/assets/futuredev.png';
imgArray['Idea'] = new Image(); imgArray['Idea'].src = '/assets/idea.png';
imgArray['Implication'] = new Image(); imgArray['Implication'].src = '/assets/implication.png';
imgArray['Insight'] = new Image(); imgArray['Insight'].src = '/assets/insight.png';
imgArray['Intention'] = new Image(); imgArray['Intention'].src = '/assets/intention.png';
imgArray['Knowledge'] = new Image(); imgArray['Knowledge'].src = '/assets/knowledge.png';
imgArray['Location'] = new Image(); imgArray['Location'].src = '/assets/location.png';
imgArray['Open Issue'] = new Image(); imgArray['Open Issue'].src = '/assets/openissue.png';
imgArray['Opinion'] = new Image(); imgArray['Opinion'].src = '/assets/opinion.png';
imgArray['Opportunity'] = new Image(); imgArray['Opportunity'].src = '/assets/opportunity.png';
imgArray['Platform'] = new Image(); imgArray['Platform'].src = '/assets/platform.png';
imgArray['Problem'] = new Image(); imgArray['Problem'].src = '/assets/problem.png';
imgArray['Question'] = new Image(); imgArray['Question'].src = '/assets/question.png';
imgArray['Reference'] = new Image(); imgArray['Reference'].src = '/assets/reference.png';
imgArray['Requirement'] = new Image(); imgArray['Requirement'].src = '/assets/requirement.png';
imgArray['Resource'] = new Image(); imgArray['Resource'].src = '/assets/resource.png';
imgArray['Role'] = new Image(); imgArray['Role'].src = '/assets/role.png';
imgArray['Task'] = new Image(); imgArray['Task'].src = '/assets/task.png';
imgArray['Tool'] = new Image(); imgArray['Tool'].src = '/assets/tool.png';
imgArray['Trajectory'] = new Image(); imgArray['Trajectory'].src = '/assets/trajectory.png';
imgArray['Action'] = new Image(); imgArray['Action'].src = '/assets/action.png';
imgArray['Activity'] = new Image(); imgArray['Activity'].src = '/assets/activity.png';
function initFD(){
// init custom node type
$jit.ForceDirected.Plot.NodeTypes.implement({
'customNode': {
'render': function (node, canvas) {
var pos = node.pos.getc(true),
dim = node.getData('dim'),
cat = node.getData('itemcatname'),
ctx = canvas.getCtx();
ctx.drawImage(imgArray[cat], pos.x - dim, pos.y - dim, dim*2, dim*2);
},
'contains': function(node, pos) {
var npos = node.pos.getc(true),
dim = node.getData('dim');
return this.nodeHelper.circle.contains(npos, pos, dim);
}
}
});
//implement an edge type
$jit.ForceDirected.Plot.EdgeTypes.implement({
'customEdge': {
'render': function(adj, canvas) {
//get nodes cartesian coordinates
var pos = adj.nodeFrom.pos.getc(true);
var posChild = adj.nodeTo.pos.getc(true);
var directionCat = adj.getData("category");
//label placement on edges
//plot arrow edge
if (directionCat == "none") {
this.edgeHelper.line.render({ x: pos.x, y: pos.y }, { x: posChild.x, y: posChild.y }, canvas);
}
else if (directionCat == "both") {
this.edgeHelper.arrow.render({ x: pos.x, y: pos.y }, { x: posChild.x, y: posChild.y }, 40, false, canvas);
this.edgeHelper.arrow.render({ x: pos.x, y: pos.y }, { x: posChild.x, y: posChild.y }, 40, true, canvas);
}
else if (directionCat == "from-to") {
var direction = adj.data.$direction;
var inv = (direction && direction.length>1 && direction[0] != adj.nodeFrom.id);
this.edgeHelper.arrow.render({ x: pos.x, y: pos.y }, { x: posChild.x, y: posChild.y }, 40, inv, canvas);
}
//check for edge label in data
var desc = adj.getData("desc") + ' (' + adj.getData("userid") + ',' + adj.getData("id") + ')';
var showDesc = adj.getData("showDesc");
if( desc != "" && showDesc ) {
//now adjust the label placement
var radius = canvas.getSize();
var x = parseInt((pos.x + posChild.x - (desc.length * 5)) /2);
var y = parseInt((pos.y + posChild.y) /2);
canvas.getCtx().fillStyle = '#000';
canvas.getCtx().font = 'bold 14px arial';
//canvas.getCtx().fillText(desc, x, y);
}
}
}
});
// end
// init ForceDirected
fd = new $jit.ForceDirected({
//id of the visualization container
injectInto: 'infovis',
//Enable zooming and panning
//by scrolling and DnD
Navigation: {
enable: true,
type: 'HTML',
//Enable panning events only if we're dragging the empty
//canvas (and not a node).
panning: 'avoid nodes',
zooming: 10 //zoom speed. higher is more sensible
},
// Change node and edge styles such as
// color and width.
// These properties are also set per node
// with dollar prefixed data-properties in the
// JSON structure.
Node: {
overridable: true,
color: '#2D6A5D',
type: 'customNode',
dim: 25
},
Edge: {
overridable: true,
color: '#222222',
type: 'customEdge',
lineWidth: 1
},
//Native canvas text styling
Label: {
type: 'HTML', //Native or HTML
size: 20,
//style: 'bold'
},
//Add Tips
Tips: {
enable: true,
onShow: function(tip, node) {
//count connections
var count = 0;
node.eachAdjacency(function() { count++; });
//display node info in tooltip
tip.innerHTML = "<div class=\"tip-title\">" + node.name + "</div>"
+ "<div class=\"tip-text\">connections: " + count + "</div>";
}
},
// Add node events
Events: {
enable: true,
type: 'HTML',
//Change cursor style when hovering a node
onMouseEnter: function() {
//fd.canvas.getElement().style.cursor = 'move';
},
onMouseLeave: function() {
//fd.canvas.getElement().style.cursor = '';
},
//Update node positions when dragged
onDragMove: function(node, eventInfo, e) {
var pos = eventInfo.getPos();
node.pos.setc(pos.x, pos.y);
fd.plot();
},
//Implement the same handler for touchscreens
onTouchMove: function(node, eventInfo, e) {
$jit.util.event.stop(e); //stop default touchmove event
this.onDragMove(node, eventInfo, e);
},
//Add also a click handler to nodes
onClick: function(node) {
if(!node) return;
//set final styles
fd.graph.eachNode(function(n) {
if(n.id != node.id) delete n.selected;
n.setData('dim', 25, 'end');
n.eachAdjacency(function(adj) {
adj.setDataset('end', {
lineWidth: 0.5,
color: '#222222'
});
adj.setData('showDesc', false, 'current');
});
});
if(!node.selected) {
node.selected = true;
node.setData('dim', 35, 'end');
node.eachAdjacency(function(adj) {
adj.setDataset('end', {
lineWidth: 3,
color: '#FFF'
});
adj.setData('showDesc', true, 'current');
});
} else {
delete node.selected;
}
//trigger animation to final styles
fd.fx.animate({
modes: ['node-property:dim',
'edge-property:lineWidth:color'],
duration: 500
});
// Build the right column relations list.
// This is done by traversing the clicked node connections.
var html =
'<p class="type">' + node.getData("itemcatname") + '</p>' +
'<img alt="' + node.getData("itemcatname") + '" class="icon" height="50" src="' + imgArray[node.getData("itemcatname")].src + '" width="50" />' +
'<div class="scroll"><a href="/users/' + node.getData("userid") + '/items/' + node.id + '" class="title">' + node.name + '</a>' +
'<div class="contributor">Added by: <a href="/users/' + node.getData('userid') + '">' + node.getData('username') + '</a></div>' +
'<div class="desc"><p>' + node.getData('desc') + '</p></div></div>' +
'<a href="' + node.getData('link') + '" class="link" target="_blank">' + node.getData('link') + '</a>';
//append connections information
$jit.id('showcard').innerHTML = '<div class="item" id="item_' + node.id + '"></div>';
$jit.id('item_' + node.id).innerHTML = html;
$("#showcard .scroll").mCustomScrollbar();
}
},
//Number of iterations for the FD algorithm
iterations: 200,
//Edge length
levelDistance: 200,
// Add text to the labels. This method is only triggered
// on label creation and only for DOM labels (not native canvas ones).
onCreateLabel: function(domElement, node){
// Create a 'name' and 'close' buttons and add them
// to the main node label
var nameContainer = document.createElement('span'),
style = nameContainer.style;
nameContainer.className = 'name';
nameContainer.innerHTML = '<div class="label">' + node.name + '</div>';
domElement.appendChild(nameContainer);
style.fontSize = "0.9em";
style.color = "#222222";
//Toggle a node selection when clicking
//its name. This is done by animating some
//node styles like its dimension and the color
//and lineWidth of its adjacencies.
nameContainer.onclick = function() {
//set final styles
fd.graph.eachNode(function(n) {
if(n.id != node.id) delete n.selected;
n.setData('dim', 25, 'end');
n.eachAdjacency(function(adj) {
adj.setDataset('end', {
lineWidth: 0.4,
color: '#222222'
});
adj.setData('showDesc', false, 'current');
});
});
if(!node.selected) {
node.selected = true;
node.setData('dim', 35, 'end');
node.eachAdjacency(function(adj) {
adj.setDataset('end', {
lineWidth: 3,
color: '#FFF'
});
adj.setData('showDesc', true, 'current');
});
} else {
delete node.selected;
}
//trigger animation to final styles
fd.fx.animate({
modes: ['node-property:dim',
'edge-property:lineWidth:color'],
duration: 500
});
// Build the right column relations list.
// This is done by traversing the clicked node connections.
var html =
'<p class="type">' + node.getData("itemcatname") + '</p>' +
'<img alt="' + node.getData("itemcatname") + '" class="icon" height="50" src="' + imgArray[node.getData("itemcatname")].src + '" width="50" />' +
'<div class="scroll"><a href="/users/' + node.getData("userid") + '/items/' + node.id + '" class="title">' + node.name + '</a>' +
'<div class="contributor">Added by: <a href="/users/' + node.getData('userid') + '">' + node.getData('username') + '</a></div>' +
'<div class="desc"><p>' + node.getData('desc') + '</p></div></div>' +
'<a href="' + node.getData('link') + '" class="link" target="_blank">' + node.getData('link') + '</a>';
//append connections information
$jit.id('showcard').innerHTML = '<div class="item" id="item_' + node.id + '"></div>';
$jit.id('item_' + node.id).innerHTML = html;
$("#showcard .scroll").mCustomScrollbar();
};
},
// Change node styles when DOM labels are placed
// or moved.
onPlaceLabel: function(domElement, node){
var style = domElement.style;
var left = parseInt(style.left);
var top = parseInt(style.top);
var w = domElement.offsetWidth;
var dim = node.getData('dim');
style.left = (left - w / 2) + 'px';
style.top = (top + dim) + 'px';
style.display = '';
}
});
// load JSON data.
fd.loadJSON(json);
// compute positions incrementally and animate.
fd.compute()
$(document).ready(function() {
fd.animate({
modes: ['linear'],
transition: $jit.Trans.Elastic.easeOut,
duration: 2500
});
});
// end
}