Created
June 21, 2010 17:56
-
-
Save rklancer/447218 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
/*globals $ Raphael */ | |
// make these accessible at the Firebug/Web Inspector console | |
var r, group; | |
$(function () { | |
var notHighlighted = { | |
stroke: "#aaaaaa", | |
fill: "#aaaaaa" | |
}, | |
highlighted = { | |
stroke: "#aa0000", | |
fill: "#aa0000" | |
}, | |
notClicked = { | |
opacity: 0.5, | |
r: 6 | |
}, | |
clicked = { | |
opacity: 1.0, | |
r: 8 | |
}; | |
var $container = $("#container"), | |
w = $container.width(), | |
h = $container.height(); | |
// set up the Raphael 'canvas' and add 3 horizontally-alighted points to it. | |
r = Raphael($container[0]); | |
var points = [r.circle(w/2 + 50, h/2), r.circle(w/2, h/2), r.circle(w/2 - 50, h/2)]; | |
$.each(points, function (index, point) { point.attr(notClicked).attr(notHighlighted); }); | |
// interpose a group node (using SVG or VML semantics as appropriate) between the canvas & the 3 points | |
group = r.raphael.vml ? | |
document.createElement("vml:group") : | |
document.createElementNS("http://www.w3.org/2000/svg", "g"); // (jQuery can't create namespaced DOM nodes) | |
var $group = $(group); | |
$(r.canvas).append($group); | |
$.each(points, function (index, point) { $group.append($(point.node)); }); | |
// and attach event handlers to the group node | |
var addHighlight = function (index, point) { | |
point.attr(highlighted); | |
}; | |
var removeHighlight = function (index, point) { | |
point.attr(notHighlighted); | |
}; | |
$group.mousedown(function (evt) { | |
$.each(points, addHighlight); // highlight all the points | |
evt.target.raphael.attr(clicked); // but call out the clicked node (this is event delegation) | |
return false; | |
}); | |
var done = function (evt) { | |
$.each(points, removeHighlight); | |
evt.target.raphael.attr(notClicked); | |
return false; | |
}; | |
$group.mouseup(done); | |
$group.mouseleave(done); | |
}); |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment