metamaps--metamaps/app/assets/javascripts/Jit/graphsettings.js
2014-03-03 16:58:03 -08:00

628 lines
22 KiB
JavaScript

/*
* @file
* This function defines all settings and event callbacks for the JIT graph. Some are found in other files
* First is the common settings (the same as arranged or chaotic)
* Then if it's a centred graph additional settings are added.
*/
function graphSettings(type, embed) {
var t = {
//id of the visualization container
injectInto: 'infovis',
//Enable zooming and panning
//by scrolling and DnD
Navigation: {
enable: true,
//Enable panning events only if we're dragging the empty
//canvas (and not a node).
panning: 'avoid nodes',
zooming: 28 //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: 2,
alpha: 0.4
},
//Native canvas text styling
Label: {
type: 'Native', //Native or HTML
size: 20,
family: 'arial',
textBaseline: 'hanging',
color:'#DDD'
//style: 'bold'
},
//Add Tips
Tips: {
enable: false,
onShow: function (tip, node) {}
},
// Add node events
Events: {
enable: true,
enableForEdges: true,
onMouseMove: function(node, eventInfo, e) {
onMouseMoveHandler(node, eventInfo, e);
},
//Update node positions when dragged
onDragMove: function (node, eventInfo, e) {
onDragMoveTopicHandler(node, eventInfo, e);
},
onDragEnd: function(node, eventInfo, e) {
onDragEndTopicHandler(node, eventInfo, e, false);
},
onDragCancel: function(node, eventInfo, e) {
onDragCancelHandler(node, eventInfo, e, false);
},
//Implement the same handler for touchscreens
onTouchStart: function (node, eventInfo, e) {
//$jit.util.event.stop(e); //stop default touchmove event
//Mconsole.events.onMouseDown(e, null, eventInfo);
Mconsole.events.touched = true;
touchPos = eventInfo.getPos();
var canvas = Mconsole.canvas,
ox = canvas.translateOffsetX;
oy = canvas.translateOffsetY,
sx = canvas.scaleOffsetX,
sy = canvas.scaleOffsetY;
touchPos.x *= sx;
touchPos.y *= sy;
touchPos.x += ox;
touchPos.y += oy;
touchDragNode = node;
},
//Implement the same handler for touchscreens
onTouchMove: function (node, eventInfo, e) {
if (touchDragNode) onDragMoveTopicHandler(touchDragNode, eventInfo, e);
else {
touchPanZoomHandler(eventInfo, e);
Mconsole.labels.hideLabel(Mconsole.graph.getNode(MetamapsModel.showcardInUse));
}
},
//Implement the same handler for touchscreens
onTouchEnd: function (node, eventInfo, e) {
},
//Implement the same handler for touchscreens
onTouchCancel: function (node, eventInfo, e) {
},
//Add also a click handler to nodes
onClick: function (node, eventInfo, e) {
if (MetamapsModel.boxStartCoordinates) {
Mconsole.busy = false;
MetamapsModel.boxEndCoordinates = eventInfo.getPos();
selectNodesWithBox();
return;
}
if (e.target.id != "infovis-canvas") return false;
//clicking on a edge, node, or clicking on blank part of canvas?
if (node.nodeFrom) {
selectEdgeOnClickHandler(node, e);
} else if (node && !node.nodeFrom) {
selectNodeOnClickHandler(node, e);
} else {
//topic and synapse editing cards
if (!MetamapsModel.didPan) {
hideCards();
}
canvasDoubleClickHandler(eventInfo.getPos(), e);
}//if
},
onRightClick: function (node, eventInfo, e) {
e.preventDefault();
e.stopPropagation();
if (node && !node.nodeFrom) {
selectNodeOnRightClickHandler(node, e);
}
else if (node && node.nodeFrom) { // the variable 'node' is actually an edge/adjacency
// open right click menu
selectEdgeOnRightClickHandler(node, e);
}
else {
// right click on open canvas, options here?
}
}
},
//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) {
// onCreateLabelHandler(type, domElement, node);
//},
// Change node styles when DOM labels are placed or moved.
//onPlaceLabel: function (domElement, node) {
// onPlaceLabelHandler(domElement, node);
//}
};
if (embed) {
t.Edge.type = 'customEdgeEmbed';
}
if (type == "centered") {
t.background = {
CanvasStyles: {
strokeStyle: '#333',
lineWidth: 1.5
}
};
t.levelDistance = 280;
t.Events.enableForEdges = true;
t.Events.onDragEnd = function(node, eventInfo, e) {
//different because we can't go realtime
onDragEndTopicHandler(node, eventInfo, e, false);
};
t.Events.onDragCancel = function(node, eventInfo, e) {
//different because we're centred
onDragCancelHandler(node, eventInfo, e, true);
};
/*t.Events.onClick = function(node, eventInfo, e) {
//this is handled mostly differently than in arranged/chaotic
if (e.target.id != "infovis-canvas") return false;
//hide synapse and topic editing dialog
hideCards();
//clicking on an edge, a node, or clicking on blank part of canvas?
if (node.nodeFrom) {
selectEdgeOnClickHandler(node, e);
} else if (node && !node.nodeFrom) {
//node is actually a node :)
selectNodeOnClickHandler(node, e);
} else {
canvasDoubleClickHandler(eventInfo.getPos(), e);
}
};*/
}//if
return t;
}//graphSettings
function hideCards() {
$('#edit_synapse').hide();
MetamapsModel.edgecardInUse = null;
hideCurrentCard();
// delete right click menu
$('.rightclickmenu').remove();
}
// defining code to draw edges with arrows pointing in one direction
var renderMidArrow = function(from, to, dim, swap, canvas, placement, newSynapse){
var ctx = canvas.getCtx();
// invert edge direction
if (swap) {
var tmp = from;
from = to;
to = tmp;
}
// vect represents a line from tip to tail of the arrow
var vect = new $jit.Complex(to.x - from.x, to.y - from.y);
// scale it
vect.$scale(dim / vect.norm());
// compute the midpoint of the edge line
var newX = (to.x - from.x) * placement + from.x;
var newY = (to.y - from.y) * placement + from.y;
var midPoint = new $jit.Complex(newX, newY);
// move midpoint by half the "length" of the arrow so the arrow is centered on the midpoint
var arrowPoint = new $jit.Complex((vect.x / 0.7) + midPoint.x, (vect.y / 0.7) + midPoint.y);
// compute the tail intersection point with the edge line
var intermediatePoint = new $jit.Complex(arrowPoint.x - vect.x, arrowPoint.y - vect.y);
// vector perpendicular to vect
var normal = new $jit.Complex(-vect.y / 2, vect.x / 2);
var v1 = intermediatePoint.add(normal);
var v2 = intermediatePoint.$add(normal.$scale(-1));
if (newSynapse) {
ctx.strokeStyle = "#222222";
ctx.lineWidth = 2;
ctx.globalAlpha = 0.4;
}
ctx.beginPath();
ctx.moveTo(from.x, from.y);
ctx.lineTo(to.x, to.y);
ctx.stroke();
ctx.beginPath();
ctx.moveTo(v1.x, v1.y);
ctx.lineTo(arrowPoint.x, arrowPoint.y);
ctx.lineTo(v2.x, v2.y);
ctx.stroke();
};
// defining custom node type
var nodeSettings = {
'customNode': {
'render': function (node, canvas) {
var pos = node.pos.getc(true),
dim = node.getData('dim'),
cat = node.getData('metacode'),
greenCircle = node.getData('greenCircle'),
whiteCircle = node.getData('whiteCircle'),
ctx = canvas.getCtx();
// if the topic is from the Commons draw a green circle around it
if (greenCircle) {
ctx.beginPath();
ctx.arc(pos.x, pos.y, dim+3, 0, 2 * Math.PI, false);
ctx.strokeStyle = '#67be5f'; // green
ctx.lineWidth = 2;
ctx.stroke();
}
// if the topic is on the Canvas draw a white circle around it
if (whiteCircle) {
ctx.beginPath();
ctx.arc(pos.x, pos.y, dim+3, 0, 2 * Math.PI, false);
if (! MetamapsModel.embed) ctx.strokeStyle = 'white';
if (MetamapsModel.embed) ctx.strokeStyle = '#999';
ctx.lineWidth = 2;
ctx.stroke();
}
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);
}
}
}
var renderEdgeArrows = function(edgeHelper, adj) {
var canvas = Mconsole.canvas;
var directionCat = adj.getData('category');
var direction = adj.getData('direction');
var pos = adj.nodeFrom.pos.getc(true);
var posChild = adj.nodeTo.pos.getc(true);
//plot arrow edge
if (directionCat == "none") {
edgeHelper.line.render({ x: pos.x, y: pos.y }, { x: posChild.x, y: posChild.y }, canvas);
}
else if (directionCat == "both") {
renderMidArrow({ x: pos.x, y: pos.y }, { x: posChild.x, y: posChild.y }, 13, true, canvas, 0.7);
renderMidArrow({ x: pos.x, y: pos.y }, { x: posChild.x, y: posChild.y }, 13, false, canvas, 0.7);
}
else if (directionCat == "from-to") {
var direction = adj.data.$direction;
var inv = (direction && direction.length > 1 && direction[0] != adj.nodeFrom.id);
renderMidArrow({ x: pos.x, y: pos.y }, { x: posChild.x, y: posChild.y }, 13, inv, canvas, 0.7);
renderMidArrow({ x: pos.x, y: pos.y }, { x: posChild.x, y: posChild.y }, 13, inv, canvas, 0.3);
}
}//renderEdgeArrow
// defining custom edges
var edgeSettings = {
'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
renderEdgeArrows(this.edgeHelper, adj);
//check for edge label in data
var desc = adj.getData("desc");
var showDesc = adj.getData("showDesc");
if( desc != "" && showDesc ) {
// '&' to '&'
desc = decodeEntities(desc);
//now adjust the label placement
var ctx = canvas.getCtx();
ctx.font = 'bold 14px arial';
ctx.fillStyle = '#FFF';
ctx.textBaseline = 'hanging';
// helper function to determine how many lines are needed
// Line Splitter Function
// copyright Stephen Chapman, 19th April 2006
// you may copy this code but please keep the copyright notice as well
function splitLine(st,n) {var b = ''; var s = st;while (s.length > n) {var c = s.substring(0,n);var d = c.lastIndexOf(' ');var e =c.lastIndexOf('\n');if (e != -1) d = e; if (d == -1) d = n; b += c.substring(0,d) + '\n';s = s.substring(d+1);}return b+s;}
var arrayOfLabelLines = splitLine(desc,30).split('\n');
var index, lineWidths = [];
for (index = 0; index < arrayOfLabelLines.length; ++index) {
lineWidths.push( ctx.measureText( arrayOfLabelLines[index] ).width )
}
var width = Math.max.apply(null, lineWidths) + 8;
var height = (16 * arrayOfLabelLines.length) + 8;
var x = (pos.x + posChild.x - width)/2;
var y = ((pos.y + posChild.y) /2) - height/2;
var radius = 5;
//render background
ctx.beginPath();
ctx.moveTo(x + radius, y);
ctx.lineTo(x + width - radius, y);
ctx.quadraticCurveTo(x + width, y, x + width, y + radius);
ctx.lineTo(x + width, y + height - radius);
ctx.quadraticCurveTo(x + width, y + height, x + width - radius, y + height);
ctx.lineTo(x + radius, y + height);
ctx.quadraticCurveTo(x, y + height, x, y + height - radius);
ctx.lineTo(x, y + radius);
ctx.quadraticCurveTo(x, y, x + radius, y);
ctx.closePath();
ctx.fill();
//render text
ctx.fillStyle = '#222222';
ctx.textAlign = 'center';
for (index = 0; index < arrayOfLabelLines.length; ++index) {
ctx.fillText(arrayOfLabelLines[index], x + (width/2), y + 5 + (16*index));
}
}
}, 'contains' : function(adj, pos) {
var from = adj.nodeFrom.pos.getc(true),
to = adj.nodeTo.pos.getc(true);
return this.edgeHelper.line.contains(from, to, pos, adj.Edge.epsilon);
}
}
}
var edgeSettingsEmbed = {
'customEdgeEmbed': {
'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
renderEdgeArrows(this.edgeHelper, adj);
//check for edge label in data
var desc = adj.getData("desc");
var showDesc = adj.getData("showDesc");
if( desc != "" && showDesc ) {
// '&amp;' to '&'
desc = decodeEntities(desc);
//now adjust the label placement
var ctx = canvas.getCtx();
var radius = canvas.getSize();
var x = parseInt((pos.x + posChild.x - (desc.length * 5)) /2);
var y = parseInt((pos.y + posChild.y) /2);
ctx.font = 'bold 14px arial';
//render background
ctx.fillStyle = '#999';
var margin = 5;
var height = 14 + margin; //font size + margin
var CURVE = height / 2; //offset for curvy corners
var width = ctx.measureText(desc).width + 2 * margin - 2 * CURVE
var labelX = x - margin + CURVE;
var labelY = y - height + margin;
ctx.fillRect(labelX, labelY, width, height);
//curvy corners woo - circles in place of last CURVE pixels of rect
ctx.beginPath();
ctx.arc(labelX, labelY + CURVE, CURVE, 0, 2 * Math.PI, false);
ctx.arc(labelX + width, labelY + CURVE, CURVE, 0, 2 * Math.PI, false);
ctx.fill();
//render text
ctx.fillStyle = '#000';
ctx.fillText(desc, x, y);
}
}, 'contains' : function(adj, pos) {
var from = adj.nodeFrom.pos.getc(true),
to = adj.nodeTo.pos.getc(true);
return this.edgeHelper.line.contains(from, to, pos, adj.Edge.epsilon);
}
}
}
function drawSelectBox(eventInfo, e) {
Mconsole.plot();
var ctx=Mconsole.canvas.getCtx();
var startX = MetamapsModel.boxStartCoordinates.x,
startY = MetamapsModel.boxStartCoordinates.y,
currX = eventInfo.getPos().x,
currY = eventInfo.getPos().y;
Mconsole.plot();
ctx.beginPath();
ctx.moveTo(startX, startY);
ctx.lineTo(startX, currY);
ctx.lineTo(currX, currY);
ctx.lineTo(currX, startY);
ctx.lineTo(startX, startY);
ctx.strokeStyle = "black";
ctx.stroke();
}
function selectNodesWithBox() {
var sX = MetamapsModel.boxStartCoordinates.x,
sY = MetamapsModel.boxStartCoordinates.y,
eX = MetamapsModel.boxEndCoordinates.x,
eY = MetamapsModel.boxEndCoordinates.y;
Mconsole.graph.eachNode(function (n) {
var x = gType == "centered" ? n.pos.toComplex().x : n.pos.x,
y = gType == "centered" ? n.pos.toComplex().y : n.pos.y;
if ((sX < x && x < eX && sY < y && y < eY) || (sX > x && x > eX && sY > y && y > eY) || (sX > x && x > eX && sY < y && y < eY) || (sX < x && x < eX && sY > y && y > eY)) {
var nodeIsSelected = MetamapsModel.selectedNodes.indexOf(n);
if (nodeIsSelected == -1) selectNode(n); // the node is not selected, so select it
else if (nodeIsSelected != -1) deselectNode(n); // the node is selected, so deselect it
}
});
MetamapsModel.boxStartCoordinates = false;
MetamapsModel.boxEndCoordinates = false;
Mconsole.plot();
}
function onMouseMoveHandler(node, eventInfo, e) {
if (Mconsole.busy) return;
var node = eventInfo.getNode();
var edge = eventInfo.getEdge();
//if we're on top of a node object, act like there aren't edges under it
if (node != false) {
if (MetamapsModel.edgeHoveringOver) {
onMouseLeave(MetamapsModel.edgeHoveringOver);
}
$('canvas').css('cursor', 'pointer');
return;
}
if (edge == false && MetamapsModel.edgeHoveringOver != false) {
//mouse not on an edge, but we were on an edge previously
onMouseLeave(MetamapsModel.edgeHoveringOver);
} else if (edge != false && MetamapsModel.edgeHoveringOver == false) {
//mouse is on an edge, but there isn't a stored edge
onMouseEnter(edge);
} else if (edge != false && MetamapsModel.edgeHoveringOver != edge) {
//mouse is on an edge, but a different edge is stored
onMouseLeave(MetamapsModel.edgeHoveringOver)
onMouseEnter(edge);
}
//could be false
MetamapsModel.edgeHoveringOver = edge;
if (!node && !edge) {
$('canvas').css('cursor', 'default');
}
}
function onMouseEnter(edge) {
$('canvas').css('cursor', 'pointer');
var edgeIsSelected = MetamapsModel.selectedEdges.indexOf(edge);
//following if statement only executes if the edge being hovered over is not selected
if (edgeIsSelected == -1) {
edge.setData('showDesc', true, 'current');
edge.setDataset('end', {
lineWidth: 4,
alpha: 1
});
Mconsole.fx.animate({
modes: ['edge-property:lineWidth:color:alpha'],
duration: 100
});
Mconsole.plot();
}
}
function onMouseLeave(edge) {
$('canvas').css('cursor', 'default');
var edgeIsSelected = MetamapsModel.selectedEdges.indexOf(edge);
//following if statement only executes if the edge being hovered over is not selected
if (edgeIsSelected == -1) {
edge.setData('showDesc', false, 'current');
edge.setDataset('end', {
lineWidth: 2,
alpha: 0.4
});
Mconsole.fx.animate({
modes: ['edge-property:lineWidth:color:alpha'],
duration: 100
});
}
Mconsole.plot();
}
// this is for hiding one topic from your canvas
function onDragEndTopicHandler(node, eventInfo, e, allowRealtime) {
if (tempInit && tempNode2 == null) {
$('#topic_addSynapse').val("true");
$('#new_topic').fadeIn('fast');
$('#topic_name').focus();
} else if (tempInit && tempNode2 != null) {
$('#topic_addSynapse').val("false");
$('#synapse_topic1id').val(tempNode.id);
$('#synapse_topic2id').val(tempNode2.id);
$('#new_synapse').fadeIn('fast');
$('#synapse_desc').typeahead('setQuery','').focus();
tempNode = null;
tempNode2 = null;
tempInit = false;
} else if (dragged && dragged != 0 && goRealtime) {
saveLayout(dragged);
for (var i = 0; i < MetamapsModel.selectedNodes.length; i++) {
saveLayout(MetamapsModel.selectedNodes[i].id);
}
}
}//onDragEndTopicHandler
function onDragCancelHandler(node, eventInfo, e, centred) {
tempNode = null;
tempNode2 = null;
tempInit = false;
//not sure why this doesn't happen for centred graphs
if (!centred) {
$('#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 = $('#topic_' + node.id + '_label').width();
style.left = (left - w / 2) + 'px';
style.top = (top+20) + 'px';
style.display = '';
// now position the showcard
if (MetamapsModel.showcardInUse != null) {
top = $('#' + MetamapsModel.showcardInUse).css('top');
left = parseInt($('#' + MetamapsModel.showcardInUse).css('left'));
if (0 != $('#topic_' + MetamapsModel.showcardInUse + '_label').width()) {
MetamapsModel.widthOfLabel = $('#topic_' + MetamapsModel.showcardInUse + '_label').width();
}
w = MetamapsModel.widthOfLabel/2;
left = (left + w) + 'px';
$('#showcard').css('top', top);
$('#showcard').css('left', left);
Mconsole.labels.hideLabel(Mconsole.graph.getNode(MetamapsModel.showcardInUse));
}
}
// 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