Re: FLTK refresh required

[Ben Abbott]

On Jul 26, 2013, at 10:07 PM, Ben Abbott wrote:

> On Jul 26, 2013, at 9:13 AM, Ben Abbott wrote:
> 
>> On Jul 25, 2013, at 9:49 PM, Dmitri A. Sergatskov wrote:
>> 
>>> On Thu, Jul 25, 2013 at 2:39 PM, Dmitri A. Sergatskov <address@hidden> 
>>> wrote:
>>> I took a sceenshot and counted pixels. 
>>> The lower left corner of the canvas is at 200,300 from (lower left corner 
>>> of the screen).
>>> The height of the canvas is 420 (+some 30 for the windows decoration).
>>> 
>>> Dmitri.
>>> -- 
>>> Attached is a relevant cutout.
>>> 
>>> Dmitri.
>> 
>> I've reattached your bitmap with the figure's "position" property labeled as 
>> being 560x400 pixels in size.  The toolbar at the bottom is 560x20 and the 
>> title bar is 560x30.
>> 
>> There are 20 pixels missing.  I'll try to determine if the missing pixels 
>> are from the top/bottom margin or from the axes height latter today (when I 
>> have some more free time).
>> 
>> Ben
> 
> I've measured the axes box size of Dimitri's example, and included it in the 
> graphic below.
> 
> <screendump.png>
> 
> Below is a short Octave session run on Mac OSX which indicates the axes box 
> size (marked as 434x310) is the correct fractional size of the figure size 
> (marked as 560x440).
> 
> -------------------------
> figure
> set (gcf, 'position', [130, 436, 560, 380])
> axes
> set (gca, 'units', 'pixels')
> get (gca, 'position')
> ans =
> 
>     73.80000    42.80000   434.00000   309.70000
> -------------------------
> 
> This looks to confirm Michael's hypothesis, which I've included below.
> 
> - Octave creates a figure object with the default position
> - FLTK backend creates the corresponding window and size it to the figure 
> position
> - FLTK backend puts the OpenGL widget *and* the menubar and the statusbar 
> within the allocated window
> - Because of the height of the menubar and statusbar, the OpenGL widget 
> height is less than the default height from the "position" property
> - FLTK event loop processes the move/resize event that is (always) occurring 
> when a window is initially shown
> - FLTK backend updates the position property with the real OpenGL widget size
> 
> On Mac OSX ...
> 
> -------------------------
> figure
> axes
> set (gca, 'units', 'pixels')
> get (gcf, 'position')
> ans =
> 
>    300   200   560   420
> 
> get (gca, 'position')
> ans =
> 
>     73.80000    47.20000   434.00000   342.30000
> -------------------------
> 
> The axes and figure size is what is expected (the FLTK event loop is not 
> modifying them from their default value).  However, while the axes box size 
> is the proper size (see below), the figure' size is too tall by 20 pixels.
> 
> <macosx.png>
> 
> The menu bar is also missing.  I can get that back by adding a clf ().
> 
> <MacOSX-no-axes.png>
> 
> The figure area appears to be rendered on top of the menubar.
> 
> Over the weekend, I'll open a bug report for Linux, and update bug # 39555 
> for Mac OSX.
> 
>       https://savannah.gnu.org/bugs/index.php?39555
> 
> Ben

I've added to bug 39555, and open a new bug for Linux.

        https://savannah.gnu.org/bugs/index.php?39577

Ben