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Support lasso in webgl rendering. #400

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Support lasso in webgl rendering. #400

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9deb1d4
Enable lasso on webgl rendering.
jaejaejae Aug 7, 2017
3ca33b3
Enable lasso selection on webgl rendering.
jaejaejae Aug 7, 2017
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51 changes: 24 additions & 27 deletions plugins/sigma.plugins.lasso/sigma.plugins.lasso.js
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Original file line number Diff line number Diff line change
Expand Up @@ -14,8 +14,8 @@
// Initialize package:
sigma.utils.pkg('sigma.plugins');

var _body = undefined,
_instances = {};
var _body = undefined,
_instances = {};

/**
* Lasso Object
Expand All @@ -24,20 +24,10 @@
* @param {renderer} renderer The sigma instance renderer.
* @param {sigma.classes.configurable} settings A settings class
*/
function Lasso (sigmaInstance, renderer, settings) {
function Lasso(sigmaInstance, renderer, settings) {
// Lasso is also an event dispatcher
sigma.classes.dispatcher.extend(this);

// A quick hardcoded rule to prevent people from using this plugin with the
// WebGL renderer (which is impossible at the moment):
if (
sigma.renderers.webgl &&
renderer instanceof sigma.renderers.webgl
)
throw new Error(
'The sigma.plugins.lasso is not compatible with the WebGL renderer'
);

this.sigmaInstance = sigmaInstance;
this.renderer = renderer;
this.drawingCanvas = undefined;
Expand All @@ -56,7 +46,7 @@
'fillWhileDrawing': false,
'fillStyle': 'rgba(200, 200, 200, 0.25)',
'cursor': 'crosshair'
}, settings || {});
}, settings || {});
};

/**
Expand Down Expand Up @@ -216,8 +206,8 @@
function onDrawing (event) {
if (this.isActive && this.isDrawing) {
var x = 0,
y = 0,
drawingRectangle = this.drawingCanvas.getBoundingClientRect();
y = 0,
drawingRectangle = this.drawingCanvas.getBoundingClientRect();
switch (event.type) {
case 'touchmove':
x = event.touches[0].clientX;
Expand Down Expand Up @@ -246,14 +236,14 @@
// Redraw the complete path for a smoother effect
// Even smoother with quadratic curves
var sourcePoint = this.drewPoints[0],
destinationPoint = this.drewPoints[1],
pointsLength = this.drewPoints.length,
getMiddlePointCoordinates = function (firstPoint, secondPoint) {
return {
x: firstPoint.x + (secondPoint.x - firstPoint.x) / 2,
y: firstPoint.y + (secondPoint.y - firstPoint.y) / 2
};
destinationPoint = this.drewPoints[1],
pointsLength = this.drewPoints.length,
getMiddlePointCoordinates = function (firstPoint, secondPoint) {
return {
x: firstPoint.x + (secondPoint.x - firstPoint.x) / 2,
y: firstPoint.y + (secondPoint.y - firstPoint.y) / 2
};
};

this.drawingContext.beginPath();
this.drawingContext.moveTo(sourcePoint.x, sourcePoint.y);
Expand All @@ -280,18 +270,25 @@
function onDrawingEnd (event) {
if (this.isActive && this.isDrawing) {
this.isDrawing = false;

// Select the nodes inside the path
var nodes = this.renderer.nodesOnScreen,
var nodes = this.sigmaInstance.graph.nodes(),
nodesLength = nodes.length,
i = 0,
prefix = this.renderer.options.prefix || '';

if (
sigma.renderers.webgl &&
this.renderer instanceof sigma.renderers.webgl
) {
// Remove 'read_'
prefix = prefix.slice(5);
}

// Loop on all nodes and check if they are in the path
while (nodesLength--) {
var node = nodes[nodesLength],
x = node[prefix + 'x'],
y = node[prefix + 'y'];
x = node[prefix + 'x'],
y = node[prefix + 'y'];

if (this.drawingContext.isPointInPath(x, y) && !node.hidden) {
this.selectedNodes.push(node);
Expand Down