[Octave-bug-tracker] [bug #58649] axes labeling breaks the axis position property during printing

[Pantxo Diribarne]

Follow-up Comment #2, bug #58649 (project octave):

Unfortunately, annotation objects are drawn on a separate axes so resizing
figures lead to misalignment (and printing happens to involve resizing).

The reason why the misalignment is not visible onscreen is because of bug
#45600. In short text takes relatively more space in printout than onscreen
and this forces the axes to shrink.

Here is a simpler example that shows the effect both onscreen and in
printout:


figure ("position", [50 50 300 300]);
plot (1:10)
hi = annotation ("textbox", get (gca, "position"), ...
                 "string", " Position","fitboxtotext", "off", ...
                 "linestyle", "--", "edgecolor", "b", ...
                 "linewidth", 3, "color", "b", ...
                 "verticalalignment", "bottom", "fontsize", 15);
print /tmp/before_ylabel.png
ylabel ("YLABEL", "fontsize", 40)
print /tmp/after_ylabel.png


The workaround is to add a listener on the axes position property and let it
update the position of your annotations when needed. In the above example it
would look like:


figure ("position", [50 50 300 300]);
plot (1:10)
hi = annotation ("textbox", get (gca, "position"), ...
                 "string", " Position","fitboxtotext", "off", ...
                 "linestyle", "--", "edgecolor", "b", ...
                 "linewidth", 3, "color", "b", ...
                 "verticalalignment", "bottom", "fontsize", 15);
addlistener (gca, "position", @(h) set (hi, "position", get (gca,
"position")))
ylabel ("YLABEL", "fontsize", 40)
 

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