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Updated example

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Dennis Hotson 2014-01-11 06:11:16 +11:00
parent 7e24c1c209
commit e5e66608ba
1 changed files with 8 additions and 6 deletions
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index.html
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@ -117,7 +117,7 @@
<p>It means that springy uses some real world physics to try and figure out how to show a network graph in a way that looks good.</p> <p>It means that springy uses some real world physics to try and figure out how to show a network graph in a way that looks good.</p>
<p>Here's an example:</p> <p>Here's an example:</p>
<canvas id="demo" class="example" width="650" height="288"></canvas> <canvas id="demo" class="example" width="650" height="350"></canvas>
</div> </div>
<!-- Here's a Springy worked example right here in the source. Enjoy! :-) --> <!-- Here's a Springy worked example right here in the source. Enjoy! :-) -->
@ -131,16 +131,18 @@
var node2 = graph.newNode({label: 'Sicilian Fir'}); var node2 = graph.newNode({label: 'Sicilian Fir'});
var node3 = graph.newNode({label: 'Sumatran Pine'}); var node3 = graph.newNode({label: 'Sumatran Pine'});
var node4 = graph.newNode({label: 'Japanese Larch'}); var node4 = graph.newNode({label: 'Japanese Larch'});
var node5 = graph.newNode({label: 'Giant Sequoia'});
// connect them with an edge // connect them with an edge
graph.newEdge(node1, node2); graph.newEdge(node1, node2);
graph.newEdge(node2, node3); graph.newEdge(node2, node3);
graph.newEdge(node2, node4); graph.newEdge(node2, node4);
graph.newEdge(node1, node4); graph.newEdge(node1, node4);
graph.newEdge(node1, node5);
var layout = new Springy.Layout.ForceDirected( var layout = new Springy.Layout.ForceDirected(
graph, graph,
200.0, // Spring stiffness 300.0, // Spring stiffness
400.0, // Node repulsion 400.0, // Node repulsion
0.5 // Damping 0.5 // Damping
); );
@ -150,11 +152,11 @@
var renderer = new Springy.Renderer(layout, var renderer = new Springy.Renderer(layout,
function clear() { function clear() {
ctx.clearRect(0, 0, 650, 300); ctx.clearRect(0, 0, 650, 350);
}, },
function drawEdge(edge, p1, p2) { function drawEdge(edge, p1, p2) {
ctx.save(); ctx.save();
ctx.translate(325, 144); ctx.translate(650/2, 350/2);
ctx.strokeStyle = 'rgba(0,0,0,0.15)'; ctx.strokeStyle = 'rgba(0,0,0,0.15)';
ctx.lineWidth = 3.0; ctx.lineWidth = 3.0;
@ -168,14 +170,14 @@
}, },
function drawNode(node, p) { function drawNode(node, p) {
ctx.save(); ctx.save();
ctx.translate(325, 144); ctx.translate(650/2, 350/2);
ctx.font = "18px 'IM Fell English', 'Times New Roman', serif"; ctx.font = "18px 'IM Fell English', 'Times New Roman', serif";
var width = ctx.measureText(node.data.label).width; var width = ctx.measureText(node.data.label).width;
var x = p.x * 50; var x = p.x * 50;
var y = p.y * 40; var y = p.y * 40;
ctx.clearRect(x - width / 2.0 - 5, y - 12, width + 10, 24); ctx.clearRect(x - width / 2.0 - 2, y - 10, width + 4, 20);
ctx.fillStyle = '#000000'; ctx.fillStyle = '#000000';
ctx.fillText(node.data.label, x - width / 2.0, y + 5); ctx.fillText(node.data.label, x - width / 2.0, y + 5);