Re: 'paperpositionmode' change to rid gnuplot_set_term: size is zero

[Ben Abbott]

On Monday, January 05, 2009, at 07:52AM, "Michael Goffioul" <address@hidden> 
wrote:
>On Mon, Jan 5, 2009 at 12:20 PM, Ben Abbott <address@hidden> wrote:
>> Michael/others,
>>
>> I've essentially mimicked prior examples in order to set the defaults for
>> ...
>>
>> axes.xticks
>> axes.yticks
>> axes.zticks
>> figure.papersize
>> figure.paperposition
>> root.screensize
>>
>> I've also attempted to add the "character" unit to
>> graphics:convert_positon(...)
>>
>> There is a typo for the radio value "pixels" for the property text.fontunits
>> which is fixed as well.
>>
>> I'd appreciate some advice/critque regarding the attached changeset.
>>
>> Beyond these changes, I'd also like to see the axes.xticklabel / yticklabel
>> / zticklabel updated when the xtick / ytick / ztick is set.  I have not
>> looked into how the listeners are handled on the c++ side yet, so I can't
>> ask any intelligent questions. However, it appears to me that it would be
>> proper to set the initial axes.xticklabel / yticklabel / zticklabel default
>> values. However, I have been unable to figure that out.
>>
>> Is it possible to set the ticklabels using a function (in graphics.cc) as is
>> done for numeric values (for example the one below)
>>
>>  static Matrix
>> default_axes_tick (void)
>> {
>>  Matrix m (1, 6, 0.0);
>>  m(0) = 0.0;
>>  m(1) = 0.2;
>>  m(2) = 0.4;
>>  m(3) = 0.6;
>>  m(4) = 0.8;
>>  m(5) = 1.0;
>>  return m;
>> }
>>
>> Where graphics.h.in would then have
>>
>>      row_vector_property xtick m , default_axes_tick ()
>>      row_vector_property ytick m , default_axes_tick ()
>>      row_vector_property ztick m , default_axes_tick ()
>>
>> My naive guess would be to replace "Matrix" with "octave_value" (which I'd
>> bet is wrong, because I can't find any such examples in the code). Beyond
>> that I have no clue how to specify a cell array of strings.
>
>You can use Cell class for that. But in this specific case, I wouldn't
>try to add a default_axes_ticklabel() function, but instead provide
>a function that can create the cell array of strings from the numerical
>values and use it in the init() method and in the tick updater methods.
>Schematically (untested), this would look like:
>
>Cell compute_ticklabels(const Matrix& ticks)
>{
>  ...
>}
>
>void init(void)
>{
>  ...
>  xticklabel = compute_ticklabels(xtick.get().matrix_value());
>  ...
>}
>
>void update_xtick(void)
>{
>  if (xticklabelmode.is("auto")
>    xticklabel = compute_ticklabels(xtick.get().matrix_value());
>}
>
>void update_xticklabelmode(void)
>{
>  if (xticklabelmode.is("auto")
>    xticklabel = compute_ticklabels(xtick.get().matrix_value());
>}
>
>I hope you get the logic.
>
>Michael.
>

Thanks Michael,

I'll study the sources and return with an implementation or more questions.

Ben