Re: [changeset] Missing ScreenSize & ScreenPixelsPerInch properties

[Ben Abbott]

On Nov 12, 2008, at 11:47 PM, Shai Ayal wrote:

> properties are defined in src/graphics.h.in thsi file is preprocessed
> by the genprops.awk script to produce graphics.h
> you properties are defined between BEGIN_PROPERTIES/END_PROPERTIES
> line.s Each object type has these (e.g. there is a pair for
> figure/axes/....) the properties are defined there and you can add
> properties and define their initial value there
>
> Shai

Thanks Shai!

This changeset adds the properties "screensize" and  
"screenpixelsperinch" to the root object.

To set the property values local to my machine I've added the lines  
below to my ~/.octaverc

        set (0, "screensize", [1 1 1440 900])
        set (0, "screenpixelsperinch", 74.951])

Those value correspond to my Mac PowerBook. The defaults should  
probably be;

        set (0, "screensize", [1 1 1024 768])
        set (0, "screenpixelsperinch", 72])

One other change I've included is to make the figure property  
"papersize" writable.

< 2354       array_property papersize r , Matrix (1, 2, 0)
> 2354       array_property papersize , Matrix (1, 2, 0)

I need that so to allow users to specify custom pagersizes for  
printing. By that I imply that I'll follow up with a changeset for the  
gnuplot backend which respects the figure size (i.e. position(3:4))  
for x11, aqua, windows, etc, and respects the papersize when printing.

As there is no low level capability to translate changes in size/type  
to their recpective type/size, I thought I'd add a short term solution  
to gnuplot_drawnow and make sure it doesn't break print(). My solution  
to do this translation is below.

papertypes = {"usletter", "uslegal",
              "a0", "a1", "a2", "a3", "a4", "a5",
              "b0", "b1", "b2", "b3", "b4", "b5",
              "arch-a", "arch-b", "arch-c", "arch-d", "arch-e",
              "a", "b", "c", "d", "e",
              "tabloid", "<custom>"};
papersizes = [ 8.500,  8.500
              33.135, 23.404
              16.548, 11.694
               8.268,  5.847
              40.543, 28.683
              20.252, 14.342
              10.126,  7.171
               9.000, 12.000
              18.000, 24.000
              36.000,  8.500
              11.000, 17.000
              22.000, 34.000
              11.000,  8.500
              11.000, 14.000
              46.847, 33.135
              23.404, 16.528
              11.693,  8.264
              57.366, 40.503
              28.683, 20.252
              14.342, 10.126
              12.000, 18.000
              24.000, 36.000
              48.000, 11.000
              17.000, 22.000
              34.000, 44.000
              17.000, 11.000];

if (strcmpi (get (h, "papertype"), "<custom>"))
  ## if the type is custom but the size is a standard, then set the  
standard type.
  papersize = get (h, "papersize");
  n = find (all (round (1000 * ones ([size(papersizes, 1), 1]) *  
papersize) - 1000 * papersizes) == 0, 2));
  if (! isempty (n))
    set (h, "papertype", papertypes{n});
  endif
else
  n = strcmpi (papertypes, get (h, "papertype"));
  set (h, "papersize", papersizes(n,:));
endif

Once the low level functionality is in place, this should be removed.

Ben

screensize.patch
Description: Binary data