[NTG-context] TikZ and wrong drawing order

Mojca Miklavec mojca.miklavec.lists at gmail.com
Thu Jun 11 22:58:11 CEST 2015


On Thu, Jun 11, 2015 at 10:43 PM, Aditya Mahajan wrote:
> On Thu, 11 Jun 2015, Mojca Miklavec wrote:
>> On Thu, Jun 11, 2015 at 7:59 PM, Aditya Mahajan wrote:
>>> On Thu, 11 Jun 2015, Mojca Miklavec wrote:
>>>
>>>> Hi,
>>>>
>>>> I would like to ask for help for either finding a fix or some clever
>>>> workaround for the following problem.
>>>>
>>>> If I use a TikZ picture as item symbol and additionally use background
>>>> text, then the first symbol in itemize environment gets covered by the
>>>> background. Here's an example:
>>>>
>>>
>>> Workaround (though I have no idea why this should work).
>>
>>
>>>    background={foreground,color}
>>
>>
>> While it works in the sense that it gives a consistent look, it
>> doesn't really lead to the desired result, at least not for me. The
>> reason for using background colour in my case was to make text
>> "visible" on a dark background photo. It doesn't really help if the
>> main text gets hidden behind the semi-transparent layer.
>
>
> I have no idea what tikz is doing:
>
> \usemodule[tikz]
>
> \definecolor[light][s=1,a=1,t=0.1]
> \definecolor[dark] [s=1,a=1,t=0.95]
>
> \defineframedtext[normal] [width=4cm, background=color]
> \defineframedtext[reverse][width=4cm, background={foreground,color}]
>
> \startbuffer
> \tikz\fill[color=blue] (0,0) circle (.2cm);
> \startMPcode fill fullcircle scaled (.4cm) withcolor \MPcolor{blue};
> \stopMPcode
> \stopbuffer
>
> \starttext
>
> \startnormal[backgroundcolor=light] \getbuffer \stopnormal
> \startnormal[backgroundcolor=dark] \getbuffer  \stopnormal
>
> \blank[3*line]
>
> \startreverse[backgroundcolor=light] \getbuffer \stopreverse
> \startreverse[backgroundcolor=dark] \getbuffer  \stopreverse
> \stoptext

It's even more weird than that. The colour of the first item behind
the "dark" depends on the colour of "light":

\usemodule[tikz]

\definecolor[extralight][s=1,a=1,t=0.1]
\definecolor[light][s=1,a=1,t=0.6]
\definecolor[dark] [s=1,a=1,t=0.95]

\defineframedtext[normal] [width=6cm, background=color]
\defineframedtext[reverse][width=6cm, background={foreground,color}]

\startbuffer
\tikz\fill[color=blue] (0,0) circle (.2cm);%
\startMPcode fill fullcircle scaled (.4cm) withcolor \MPcolor{blue}; \stopMPcode
\tikz\fill[color=blue] (0,0) circle (.2cm);
\stopbuffer

\starttext

\startnormal[backgroundcolor=light] \getbuffer \stopnormal
\startnormal[backgroundcolor=dark] \getbuffer  \stopnormal

\blank[2*line]

\startreverse[backgroundcolor=light] \getbuffer \stopreverse
\startreverse[backgroundcolor=dark] \getbuffer different \stopreverse

\blank[2*line]

\startreverse[backgroundcolor=extralight] \getbuffer \stopreverse
\startreverse[backgroundcolor=dark] \getbuffer from this one \stopreverse
\stoptext

Mojca


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