Re: [matplotlib-devel] Canvas HTML5 backend

[John H. <jd...@gm...>]

On Tue, Sep 1, 2009 at 10:32 AM, Michael Thompson<mic...@gm...> wrote:
> Hi,
>  I'm trying to work on the canvas javascript backend I found here
> [1]. I'm trying to add text but the canvas origin is at the top left,
> how can I transform the co-ordinates from the matplotlib to canvas?
>
>    def draw_text(self, gc, x, y, s, prop, angle, ismath=False):
>        ctx = self.ctx
>        ctx.font = "12px Times New Roman";
>        ctx.fillStyle = "Black";
>        ctx.fillText("%r" % s, x, y)
>
> [1] http://bitbucket.org/sanxiyn/matplotlib-canvas/src/80e9abf6d251/backend_canvas.py

The backend canvas should know its height, so height-y should
transform from bottom to top