;(function() {
|
|
'use strict';
|
|
|
|
sigma.utils.pkg('sigma.canvas.edgehovers');
|
|
|
|
/**
|
|
* This hover renderer will display the edge with a different color or size.
|
|
*
|
|
* @param {object} edge The edge object.
|
|
* @param {object} source node The edge source node.
|
|
* @param {object} target node The edge target node.
|
|
* @param {CanvasRenderingContext2D} context The canvas context.
|
|
* @param {configurable} settings The settings function.
|
|
*/
|
|
sigma.canvas.edgehovers.curvedArrow =
|
|
function(edge, source, target, context, settings) {
|
|
var color = edge.color,
|
|
prefix = settings('prefix') || '',
|
|
edgeColor = settings('edgeColor'),
|
|
defaultNodeColor = settings('defaultNodeColor'),
|
|
defaultEdgeColor = settings('defaultEdgeColor'),
|
|
cp = {},
|
|
size = settings('edgeHoverSizeRatio') * (edge[prefix + 'size'] || 1),
|
|
count = edge.count || 0,
|
|
tSize = target[prefix + 'size'],
|
|
sX = source[prefix + 'x'],
|
|
sY = source[prefix + 'y'],
|
|
tX = target[prefix + 'x'],
|
|
tY = target[prefix + 'y'],
|
|
d,
|
|
aSize,
|
|
aX,
|
|
aY,
|
|
vX,
|
|
vY;
|
|
|
|
cp = (source.id === target.id) ?
|
|
sigma.utils.getSelfLoopControlPoints(sX, sY, tSize, count) :
|
|
sigma.utils.getQuadraticControlPoint(sX, sY, tX, tY, count);
|
|
|
|
if (source.id === target.id) {
|
|
d = Math.sqrt(Math.pow(tX - cp.x1, 2) + Math.pow(tY - cp.y1, 2));
|
|
aSize = size * 2.5;
|
|
aX = cp.x1 + (tX - cp.x1) * (d - aSize - tSize) / d;
|
|
aY = cp.y1 + (tY - cp.y1) * (d - aSize - tSize) / d;
|
|
vX = (tX - cp.x1) * aSize / d;
|
|
vY = (tY - cp.y1) * aSize / d;
|
|
}
|
|
else {
|
|
d = Math.sqrt(Math.pow(tX - cp.x, 2) + Math.pow(tY - cp.y, 2));
|
|
aSize = size * 2.5;
|
|
aX = cp.x + (tX - cp.x) * (d - aSize - tSize) / d;
|
|
aY = cp.y + (tY - cp.y) * (d - aSize - tSize) / d;
|
|
vX = (tX - cp.x) * aSize / d;
|
|
vY = (tY - cp.y) * aSize / d;
|
|
}
|
|
|
|
if (!color)
|
|
switch (edgeColor) {
|
|
case 'source':
|
|
color = source.color || defaultNodeColor;
|
|
break;
|
|
case 'target':
|
|
color = target.color || defaultNodeColor;
|
|
break;
|
|
default:
|
|
color = defaultEdgeColor;
|
|
break;
|
|
}
|
|
|
|
if (settings('edgeHoverColor') === 'edge') {
|
|
color = edge.hover_color || color;
|
|
} else {
|
|
color = edge.hover_color || settings('defaultEdgeHoverColor') || color;
|
|
}
|
|
|
|
context.strokeStyle = color;
|
|
context.lineWidth = size;
|
|
context.beginPath();
|
|
context.moveTo(sX, sY);
|
|
if (source.id === target.id) {
|
|
context.bezierCurveTo(cp.x2, cp.y2, cp.x1, cp.y1, aX, aY);
|
|
} else {
|
|
context.quadraticCurveTo(cp.x, cp.y, aX, aY);
|
|
}
|
|
context.stroke();
|
|
|
|
context.fillStyle = color;
|
|
context.beginPath();
|
|
context.moveTo(aX + vX, aY + vY);
|
|
context.lineTo(aX + vY * 0.6, aY - vX * 0.6);
|
|
context.lineTo(aX - vY * 0.6, aY + vX * 0.6);
|
|
context.lineTo(aX + vX, aY + vY);
|
|
context.closePath();
|
|
context.fill();
|
|
};
|
|
})();
|