Re: bounds on position for text()

[Ben Abbott]

On Feb 6, 2011, at 6:35 PM, Michael D Godfrey wrote:

> On 02/06/2011 03:21 PM, Konstantinos Poulios wrote:
>> On Mon, Feb 7, 2011 at 12:16 AM, Michael D Godfrey
>> 
>> <address@hidden>
>>  wrote:
>> 
>>> > 
>>> On 02/06/2011 02:49 PM, logari81 wrote:
>>> 
>>> >
>>> > 
>>> On Sun, 2011-02-06 at 17:21 -0500, Ben Abbott wrote:
>>> 
>>> >
>>>> >> 
>>>> On Feb 6, 2011, at 4:02 PM, Michael D Godfrey wrote:
>>>> 
>>>> >>
>>> >
>>>>> >> > 
>>>>> A short while ago I created a bug report
>>>>> 
>>>>> >> > 
>>>>> (32311) which pointed out the fact that
>>>>> 
>>>>> >> > 
>>>>> text(x,y,"xxx') only works for x,y within the
>>>>> 
>>>>> >> > 
>>>>> axes. Matlab and legend allow writing the
>>>>> 
>>>>> >> > 
>>>>> string anywhere in the window.
>>>>> 
>>>>> >> >
>>>>> >> > 
>>>>> Since you just fixed legend, any chance
>>>>> 
>>>>> >> > 
>>>>> you could look at this?  Quite a lot of Matlab
>>>>> 
>>>>> >> > 
>>>>> code write annotations on plots using text
>>>>> 
>>>>> >> > 
>>>>> and positions this outside the axes.
>>>>> 
>>>>> >> >
>>>>> >> > 
>>>>> Michael
>>>>> 
>>> >
>>>> >>
>>>> >> 
>>>> I notice this work for the gnuplot backend, but not for the FLTK backend.
>>>> 
>>>> >>
>>>> >> 
>>>> It looks to me like something is checking the x/ydata values and not
>>>> 
>>>> >> 
>>>> rendering the result if it is outsize the axis limits.
>>>> 
>>>> >>
>>>> >> 
>>>> I'd expect this to be done in gl_render.cc, but don't see where it is.
>>>> 
>>>> >> 
>>>> I've cc'd Kostas, in case he knows where this is done.
>>>> 
>>>> >>
>>>> >> 
>>>> Ben
>>>> 
>>>> >>
>>> >
>>> > 
>>> printing of text objects is done in draw_axes_children in gl-render.cc
>>> 
>>> > 
>>> after the clipping property is checked.
>>> 
>>> >
>>> > 
>>> So it works if you just set clipping off, like:
>>> 
>>> >
>>> > 
>>> set(ht,'clipping','off')
>>> 
>>> >
>>> > 
>>> If it would make sense we could change the default clipping to on.
>>> 
>>> >
>>> > 
>>> Kostas
>>> 
>>> >
>>> > 
>>> I just tried this.  It does not work.
>>> 
>>> > 
>>> octave:1> ht=plot(1:200)
>>> 
>>> > 
>>> ht = -19.142
>>> 
>>> > 
>>> octave:2> set(ht,'clipping','off');
>>> 
>>> > 
>>> octave:3> text(200,-2,'this is it')
>>> 
>>> > 
>>> octave:4> set(ht,'clipping','on');
>>> 
>>> > 
>>> octave:5> text(200,-2,'this is it')
>>> 
>>> > 
>>> octave:6> text(200,2,'this is it')
>>> 
>>> > 
>>> octave:7> text(200,20,'this is it')
>>> 
>>> > 
>>> octave:8> text(201,20,'this is it')
>>> 
>>> > 
>>> octave:9>
>>> 
>>> > 
>>> =========================
>>> 
>>> > 
>>> None of the text commands with x,y outside axes prints.
>>> 
>>> >
>>> >
>> the clipping property refers to the text object, so just try:
>> 
>> ht=text(200,-2,'this is it');
>> set(ht,'clipping','on');
>> 
>> Kostas
>> 
>> 
> Right. Now it "works."  Except, where you say above 'on'
> you really need 'off'.   But, it is not like Matlab and it is a bit of
> work to obtain the text handle and set 'off' for each text use.
> So, how about default  'off.'?    Someday it might be useful
> to have a global on/off, but maybe after the release?
> 
> Michael

Matlab R2010b has the default set to "off".

I recommend we do the same.

Ben