526 lines
18 KiB
JavaScript
526 lines
18 KiB
JavaScript
/*
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* @file
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* This function defines all settings and event callbacks for the JIT graph. Some are found in other files
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* First is the common settings (the same as arranged or chaotic)
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* Then if it's a centred graph additional settings are added.
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*/
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function graphSettings(type, embed) {
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var t = {
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//id of the visualization container
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injectInto: 'infovis',
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//Enable zooming and panning
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//by scrolling and DnD
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Navigation: {
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enable: true,
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type: 'HTML',
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//Enable panning events only if we're dragging the empty
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//canvas (and not a node).
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panning: 'avoid nodes',
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zooming: 15 //zoom speed. higher is more sensible
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},
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// Change node and edge styles such as
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// color and width.
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// These properties are also set per node
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// with dollar prefixed data-properties in the
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// JSON structure.
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Node: {
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overridable: true,
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color: '#2D6A5D',
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type: 'customNode',
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dim: 25
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},
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Edge: {
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overridable: true,
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color: '#222222',
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type: 'customEdge',
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lineWidth: 2,
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alpha: 0.4
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},
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//Native canvas text styling
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Label: {
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type: 'HTML', //Native or HTML
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size: 20,
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//style: 'bold'
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},
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//Add Tips
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Tips: {
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enable: false,
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onShow: function (tip, node) {}
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},
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// Add node events
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Events: {
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enable: true,
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enableForEdges: true,
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type: 'HTML',
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onMouseMove: function(node, eventInfo, e) {
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onMouseMoveHandler(node, eventInfo, e);
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},
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//Update node positions when dragged
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onDragMove: function (node, eventInfo, e) {
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onDragMoveTopicHandler(node, eventInfo, e);
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},
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onDragEnd: function(node, eventInfo, e) {
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onDragEndTopicHandler(node, eventInfo, e, false);
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},
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onDragCancel: function(node, eventInfo, e) {
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onDragCancelHandler(node, eventInfo, e, false);
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},
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//Implement the same handler for touchscreens
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onTouchMove: function (node, eventInfo, e) {
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$jit.util.event.stop(e); //stop default touchmove event
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this.onDragMove(node, eventInfo, e);
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},
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//Add also a click handler to nodes
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onClick: function (node, eventInfo, e) {
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if (e.target.id != "infovis-canvas") return false;
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//topic and synapse editing cards
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hideCards();
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//clicking on a node, or clicking on blank part of canvas?
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if (node.nodeFrom) {
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selectEdgeOnClickHandler(node, e);
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} else if (node && !node.nodeFrom) {
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selectNodeOnClickHandler(node, e);
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} else {
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canvasDoubleClickHandler(eventInfo.getPos(), e);
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}//if
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}
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},
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//Number of iterations for the FD algorithm
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iterations: 200,
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//Edge length
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levelDistance: 200,
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// Add text to the labels. This method is only triggered
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// on label creation and only for DOM labels (not native canvas ones).
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onCreateLabel: function (domElement, node) {
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onCreateLabelHandler(domElement, node);
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},
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// Change node styles when DOM labels are placed or moved.
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onPlaceLabel: function (domElement, node) {
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onPlaceLabelHandler(domElement, node);
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}
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};
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if (embed) {
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t.Edge.type = 'customEdgeEmbed';
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}
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if (type == "centered") {
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t.background = {
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CanvasStyles: {
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strokeStyle: '#333',
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lineWidth: 1.5
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}
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};
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t.Events.enableForEdges = true;
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t.Events.onDragEnd = function(node, eventInfo, e) {
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//different because we can't go realtime
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onDragEndTopicHandler(node, eventInfo, e, false);
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};
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t.Events.onDragCancel = function(node, eventInfo, e) {
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//different because we're centred
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onDragCancelHandler(node, eventInfo, e, true);
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};
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t.Events.onClick = function(node, eventInfo, e) {
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//this is handled mostly differently than in arranged/chaotic
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if (e.target.id != "infovis-canvas") return false;
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//hide synapse and topic editing dialog
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hideCards();
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//clicking on an edge, a node, or clicking on blank part of canvas?
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if (node.nodeFrom) {
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selectEdgeOnClickHandler(node, e);
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} else if (node && !node.nodeFrom) {
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//node is actually a node :)
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if (!Mconsole.busy) {
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$('h1.index').html('Viewing Topic: ' + node.name);
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window.history.pushState(node.name, "Metamaps", "/topics/" + node.id);
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Mconsole.onClick(node.id, {
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hideLabels: false,
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duration: 1000,
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onComplete: function() {
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fetchRelatives(node);
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}
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});
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}
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} else {
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canvasDoubleClickHandler(eventInfo.getPos(), e);
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}
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};
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}//if
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return t;
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}//graphSettings
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function hideCards() {
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$('#edit_synapse').hide();
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hideCurrentCard();
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}
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// defining code to draw edges with arrows pointing in one direction
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var renderMidArrow = function(from, to, dim, swap, canvas){
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var ctx = canvas.getCtx();
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// invert edge direction
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if (swap) {
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var tmp = from;
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from = to;
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to = tmp;
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}
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// vect represents a line from tip to tail of the arrow
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var vect = new $jit.Complex(to.x - from.x, to.y - from.y);
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// scale it
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vect.$scale(dim / vect.norm());
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// compute the midpoint of the edge line
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var midPoint = new $jit.Complex((to.x + from.x) / 2, (to.y + from.y) / 2);
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// move midpoint by half the "length" of the arrow so the arrow is centered on the midpoint
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var arrowPoint = new $jit.Complex((vect.x / 0.7) + midPoint.x, (vect.y / 0.7) + midPoint.y);
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// compute the tail intersection point with the edge line
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var intermediatePoint = new $jit.Complex(arrowPoint.x - vect.x, arrowPoint.y - vect.y);
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// vector perpendicular to vect
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var normal = new $jit.Complex(-vect.y / 2, vect.x / 2);
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var v1 = intermediatePoint.add(normal);
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var v2 = intermediatePoint.$add(normal.$scale(-1));
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//ctx.strokeStyle = "#222222";
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ctx.beginPath();
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ctx.moveTo(from.x, from.y);
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ctx.lineTo(to.x, to.y);
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ctx.stroke();
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ctx.beginPath();
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ctx.moveTo(v1.x, v1.y);
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ctx.lineTo(arrowPoint.x, arrowPoint.y);
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ctx.lineTo(v2.x, v2.y);
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ctx.stroke();
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};
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// defining code to draw edges with arrows pointing in both directions
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var renderMidArrows = function(from, to, dim, swap, canvas){
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var ctx = canvas.getCtx();
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// invert edge direction
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if (swap) {
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var tmp = from;
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from = to;
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to = tmp;
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}
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// vect represents a line from tip to tail of the arrow
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var vect = new $jit.Complex(to.x - from.x, to.y - from.y);
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// scale it
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vect.$scale(dim / vect.norm());
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// compute the midpoint of the edge line
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var midPoint = new $jit.Complex((to.x + from.x) / 2, (to.y + from.y) / 2);
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// move midpoint by half the "length" of the arrow so the arrow is centered on the midpoint
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var arrowPoint = new $jit.Complex((vect.x / 0.7) + midPoint.x, (vect.y / 0.7) + midPoint.y);
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// compute the tail intersection point with the edge line
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var intermediatePoint = new $jit.Complex(arrowPoint.x - vect.x,
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arrowPoint.y - vect.y);
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// vector perpendicular to vect
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var normal = new $jit.Complex(-vect.y / 2, vect.x / 2);
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var v1 = intermediatePoint.add(normal);
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var v2 = intermediatePoint.$add(normal.$scale(-1));
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//ctx.strokeStyle = "#222222";
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ctx.beginPath();
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ctx.moveTo(v1.x, v1.y);
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ctx.lineTo(arrowPoint.x, arrowPoint.y);
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ctx.lineTo(v2.x, v2.y);
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ctx.stroke();
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};
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// defining custom node type
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var nodeSettings = {
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'customNode': {
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'render': function (node, canvas) {
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var pos = node.pos.getc(true),
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dim = node.getData('dim'),
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cat = node.getData('metacode'),
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greenCircle = node.getData('greenCircle'),
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whiteCircle = node.getData('whiteCircle'),
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ctx = canvas.getCtx();
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// if the topic is from the Commons draw a green circle around it
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if (greenCircle) {
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ctx.beginPath();
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ctx.arc(pos.x, pos.y, dim+3, 0, 2 * Math.PI, false);
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ctx.strokeStyle = '#67be5f'; // green
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ctx.lineWidth = 2;
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ctx.stroke();
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}
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// if the topic is on the Canvas draw a white circle around it
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if (whiteCircle) {
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ctx.beginPath();
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ctx.arc(pos.x, pos.y, dim+3, 0, 2 * Math.PI, false);
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if (! MetamapsModel.embed) ctx.strokeStyle = 'white';
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if (MetamapsModel.embed) ctx.strokeStyle = '#999';
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ctx.lineWidth = 2;
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ctx.stroke();
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}
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ctx.drawImage(imgArray[cat], pos.x - dim, pos.y - dim, dim*2, dim*2);
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},
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'contains': function(node, pos) {
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var npos = node.pos.getc(true),
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dim = node.getData('dim');
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return this.nodeHelper.circle.contains(npos, pos, dim);
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}
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}
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}
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var renderEdgeArrows = function(edgeHelper, adj) {
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var canvas = Mconsole.canvas;
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var directionCat = adj.getData('category');
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var direction = adj.getData('direction');
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var pos = adj.nodeFrom.pos.getc(true);
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var posChild = adj.nodeTo.pos.getc(true);
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//plot arrow edge
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if (directionCat == "none") {
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edgeHelper.line.render({ x: pos.x, y: pos.y }, { x: posChild.x, y: posChild.y }, canvas);
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}
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else if (directionCat == "both") {
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renderMidArrow({ x: pos.x, y: pos.y }, { x: posChild.x, y: posChild.y }, 13, true, canvas);
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renderMidArrow({ x: pos.x, y: pos.y }, { x: posChild.x, y: posChild.y }, 13, false, canvas);
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}
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else if (directionCat == "from-to") {
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var direction = adj.data.$direction;
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var inv = (direction && direction.length > 1 && direction[0] != adj.nodeFrom.id);
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renderMidArrow({ x: pos.x, y: pos.y }, { x: posChild.x, y: posChild.y }, 13, inv, canvas);
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}
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}//renderEdgeArrow
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// defining custom edges
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var edgeSettings = {
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'customEdge': {
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'render': function(adj, canvas) {
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//get nodes cartesian coordinates
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var pos = adj.nodeFrom.pos.getc(true);
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var posChild = adj.nodeTo.pos.getc(true);
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var directionCat = adj.getData("category");
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//label placement on edges
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renderEdgeArrows(this.edgeHelper, adj);
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//check for edge label in data
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var desc = adj.getData("desc");
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var showDesc = adj.getData("showDesc");
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if( desc != "" && showDesc ) {
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// '&' to '&'
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desc = decodeEntities(desc);
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//now adjust the label placement
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var ctx = canvas.getCtx();
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var radius = canvas.getSize();
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var x = parseInt((pos.x + posChild.x - (desc.length * 5)) /2);
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var y = parseInt((pos.y + posChild.y) /2);
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ctx.font = 'bold 14px arial';
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//render background
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ctx.fillStyle = '#FFF';
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var margin = 5;
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var height = 14 + margin; //font size + margin
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var CURVE = height / 2; //offset for curvy corners
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var width = ctx.measureText(desc).width + 2 * margin - 2 * CURVE
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var labelX = x - margin + CURVE;
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var labelY = y - height + margin;
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ctx.fillRect(labelX, labelY, width, height);
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//curvy corners woo - circles in place of last CURVE pixels of rect
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ctx.beginPath();
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ctx.arc(labelX, labelY + CURVE, CURVE, 0, 2 * Math.PI, false);
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ctx.arc(labelX + width, labelY + CURVE, CURVE, 0, 2 * Math.PI, false);
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ctx.fill();
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//render text
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ctx.fillStyle = '#000';
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ctx.fillText(desc, x, y);
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}
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}, 'contains' : function(adj, pos) {
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var from = adj.nodeFrom.pos.getc(true),
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to = adj.nodeTo.pos.getc(true);
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return this.edgeHelper.line.contains(from, to, pos, adj.Edge.epsilon);
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}
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}
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}
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var edgeSettingsEmbed = {
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'customEdgeEmbed': {
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'render': function(adj, canvas) {
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//get nodes cartesian coordinates
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var pos = adj.nodeFrom.pos.getc(true);
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var posChild = adj.nodeTo.pos.getc(true);
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var directionCat = adj.getData("category");
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//label placement on edges
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renderEdgeArrows(this.edgeHelper, adj);
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//check for edge label in data
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var desc = adj.getData("desc");
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var showDesc = adj.getData("showDesc");
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if( desc != "" && showDesc ) {
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// '&' to '&'
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desc = decodeEntities(desc);
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//now adjust the label placement
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var ctx = canvas.getCtx();
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var radius = canvas.getSize();
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var x = parseInt((pos.x + posChild.x - (desc.length * 5)) /2);
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var y = parseInt((pos.y + posChild.y) /2);
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ctx.font = 'bold 14px arial';
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//render background
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ctx.fillStyle = '#999';
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var margin = 5;
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var height = 14 + margin; //font size + margin
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var CURVE = height / 2; //offset for curvy corners
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var width = ctx.measureText(desc).width + 2 * margin - 2 * CURVE
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var labelX = x - margin + CURVE;
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var labelY = y - height + margin;
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ctx.fillRect(labelX, labelY, width, height);
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//curvy corners woo - circles in place of last CURVE pixels of rect
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ctx.beginPath();
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ctx.arc(labelX, labelY + CURVE, CURVE, 0, 2 * Math.PI, false);
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ctx.arc(labelX + width, labelY + CURVE, CURVE, 0, 2 * Math.PI, false);
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ctx.fill();
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//render text
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ctx.fillStyle = '#000';
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ctx.fillText(desc, x, y);
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}
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}, 'contains' : function(adj, pos) {
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var from = adj.nodeFrom.pos.getc(true),
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to = adj.nodeTo.pos.getc(true);
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return this.edgeHelper.line.contains(from, to, pos, adj.Edge.epsilon);
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}
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}
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}
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function onMouseMoveHandler(node, eventInfo, e) {
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if (Mconsole.busy) return;
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var node = eventInfo.getNode();
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var edge = eventInfo.getEdge();
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//if we're on top of a node object, act like there aren't edges under it
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if (node != false) {
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if (MetamapsModel.edgeHoveringOver) {
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onMouseLeave(MetamapsModel.edgeHoveringOver);
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}
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return;
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}
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if (edge == false && MetamapsModel.edgeHoveringOver != false) {
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//mouse not on an edge, but we were on an edge previously
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onMouseLeave(MetamapsModel.edgeHoveringOver);
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} else if (edge != false && MetamapsModel.edgeHoveringOver == false) {
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//mouse is on an edge, but there isn't a stored edge
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onMouseEnter(edge);
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} else if (edge != false && MetamapsModel.edgeHoveringOver != edge) {
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//mouse is on an edge, but a different edge is stored
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onMouseLeave(MetamapsModel.edgeHoveringOver)
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onMouseEnter(edge);
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}
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//could be false
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MetamapsModel.edgeHoveringOver = edge;
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}
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function onMouseEnter(edge) {
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$('canvas').css('cursor', 'pointer');
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var showDesc = edge.getData("showDesc");
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if (!showDesc) {
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edge.setDataset('end', {
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lineWidth: 4,
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color: '#222222',
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alpha: 1
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});
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Mconsole.fx.animate({
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modes: ['edge-property:lineWidth:color:alpha'],
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duration: 100
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});
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Mconsole.plot();
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}
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}
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function onMouseLeave(edge) {
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$('canvas').css('cursor', 'default');
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var showDesc = edge.getData("showDesc");
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if (!showDesc) {
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edge.setDataset('end', {
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lineWidth: 2,
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color: '#222222',
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alpha: 0.4
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});
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Mconsole.fx.animate({
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modes: ['edge-property:lineWidth:color:alpha'],
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duration: 100
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});
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}
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Mconsole.plot();
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}
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// this is for hiding one topic from your canvas
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function onDragEndTopicHandler(node, eventInfo, e, allowRealtime) {
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if (tempInit && tempNode2 == null) {
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$('#topic_addSynapse').val("true");
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$('#new_topic').fadeIn('fast');
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addMetacode();
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$('#topic_name').focus();
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} else if (tempInit && tempNode2 != null) {
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$('#topic_addSynapse').val("false");
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$('#synapse_topic1id').val(tempNode.id);
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$('#synapse_topic2id').val(tempNode2.id);
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$('#synapse_desc').autocomplete('enable');
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$('#new_synapse').fadeIn('fast');
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$('#synapse_desc').focus();
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tempNode = null;
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tempNode2 = null;
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tempInit = false;
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} else if (dragged != 0 && goRealtime) {
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//TODO: dragged is invalid if multiple nodes were dragged
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saveLayout(dragged);
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}
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}//onDragEndTopicHandler
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function onDragCancelHandler(node, eventInfo, e, centred) {
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tempNode = null;
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tempNode2 = null;
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tempInit = false;
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//not sure why this doesn't happen for centred graphs
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if (!centred) {
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$('#topic_addSynapse').val("false");
|
|
$('#topic_topic1id').val(0);
|
|
$('#topic_topic2id').val(0);
|
|
}
|
|
Mconsole.plot();
|
|
}
|
|
|
|
function onPlaceLabelHandler(domElement, node) {
|
|
var style = domElement.style;
|
|
var left = parseInt(style.left);
|
|
var top = parseInt(style.top);
|
|
var w = domElement.offsetWidth;
|
|
style.left = (left - w / 2 + 107) + 'px';
|
|
style.top = (top-165) + 'px';
|
|
style.display = '';
|
|
var label = document.getElementById('topic_' + node.id + '_label');
|
|
$(label).show();
|
|
w = label.offsetWidth;
|
|
style = label.style;
|
|
style.left = (-(w / 2 + 106)) + 'px';
|
|
}
|
|
|
|
// thanks to http://stackoverflow.com/questions/4338963/
|
|
// convert-html-character-entities-back-to-regular-text-using-javascript
|
|
function decodeEntities(desc) {
|
|
var str, temp = document.createElement('p');
|
|
temp.innerHTML = desc; //browser handles the entities
|
|
str = temp.textContent || temp.innerText;
|
|
temp = null; //delete the element;
|
|
return str;
|
|
}//decodeEntities
|
|
|