Flot draw additional vertical grid line - flot

Question

I can't get rid of vertical line in the end of graph.
I have replicated problem here:
http://jsfiddle.net/63BPw/4/
Color of grid lines is darkred and it's setted only in this part of js code:
grid: {
aboveData: false,
hoverable: true,
clickable: true,
color: "darkred",
borderWidth: {
top: 0,
bottom: 1,
left: 0,
right: 0
}
}
Console do not throw any errors. I don't use any margins from inside javascript file or external css files.

Answer 1

I think this is probably a bug.
The problem isn't in your grid setup, but in the drawing of each axis. Specifically, you setup 2 y-axes, one on the left and one on the right. Deep in the flot code, it decides whether to draw a "bar" to attach the ticks to based on whether the axis is the "innermost" or not. When you have 2 yaxes, it is incorrectly deciding that your right-positioned yaxis is not innermost, and therefore drawing a tick bar.
Relevant code, both bits are called per-axis:
In allocateAxisBoxFirstPhase:
/*note this is only called for axes that have tickLength set
but later it is checked as true/false, not undefined
(which is what you'd get if you set your yaxis tickLength = 0) */
var sameDirection = $.grep(all, function (a) {
return a && a.reserveSpace;
});
innermost = $.inArray(axis, sameDirection) == 0;
In drawGrid:
if (!axis.innermost) {
//in here it draws the tick bar
}
Workaround:
Find that !axis.innermost bit and change it to axis.innermost == false. Set tickLength = 0 in your 2nd yaxis. That's it.
I've implemented those two changes here: http://jsfiddle.net/63BPw/5/
Also, FYI I filed a bug about this: https://github.com/flot/flot/issues/1056