Re: graphics stacking order

[Shai Ayal]

On Fri, Nov 27, 2009 at 8:16 PM, Ben Abbott <address@hidden> wrote:
>
> On Nov 27, 2009, at 12:43 PM, Shai Ayal wrote:
>
>> Hi,
>>
>> while trying to get colorbar to work, I realized I'm not sure what the
>> graphics stacking order (that is what object should be in front)
>> should be.
>>
>> consider the following code:
>>
>> clf ();
>> ax1 = gca ();
>> sombrero (); # just so that we have something drawn
>> ax2 = axes ("position", [0.3, 0.3, 0.2, 0.2]);
>> ch=get (gcf (), "children")
>>
>> with current tip I see ax1 drawn on top of ax2, (both in gnuplot and
>> fltk) and ch = [ax2;ax1]
>> I couldn't find a reference for what matlab would do. I'm pretty sure
>> that at least ax2 should be drawn on top of a1, but I'm not sure about
>> the order of ch. Can anyone try on matlab and report?
>>
>> Shai
>
>
> Octave orders the objects in the same way as Matlab.
>
> Here's a simple illustration using Matlab.
>
>>> x = 0:1;
>>> plot (x,x,  x,x,  x,x,  x,x,  x,x,  x,x,  x,x)
>>> ch = get (gca, 'children');
>>> cell2mat (get (ch, 'color'))
> ans =
>
>         0.25         0.25         0.25
>         0.75         0.75            0
>         0.75            0         0.75
>            0         0.75         0.75
>            1            0            0
>            0          0.5            0
>            0            0            1
>
>>> get (gca, 'colororder')
>
> ans =
>
>            0            0            1
>            0          0.5            0
>            1            0            0
>            0         0.75         0.75
>         0.75            0         0.75
>         0.75         0.75            0
>         0.25         0.25         0.25
>
I'm sorry for being so dense, but it's too late at night to try to
decipher your example.
Can you please elaborate?
what is the order of the children (i,e, when I add a new child, does
it go before or after the current children in the children vector)?
does the first child get to be on top when drawing?

Shai