[Octave-patch-tracker] [patch #8722] implement impixelinfo and impixelinfoval

[Carnë Draug]

Follow-up Comment #8, patch #8722 (project octave):

As discussed on IRC with andy:

> I just looked at your impixelinfo. I think that should be done as
impixelinfoval. Matlab seems to include the impixelinfoval control inside the
other so it probably impixelinfo calls impixelinfoval.

> carandraug: Do you understand this? "...When created with impixelinfo, the
tool is a uipanel object.... When created with impixelinfoval, the tool is a
uicontrol object...
> I'm not familiar with ui* object and thought a uicontrol style=text is the
same as a panel

> a control is element that you can interact with such as button, piece of
text, dropdown menu, etc. A panel is just a place where you can put stuff
(other panels or a control)
> so what that sentence means is that impixelinfoval will create a uicontrol
with the text only. If you use impixelinfo, then it creates a panel with the
text "Pixel Info" which is followed by a uicontrol (the one that created by
impixelinfoval) that shows the actual pixelinfp 
> this separation of things allows you to place the pixelinfo somewhere else,
in your own uipanel


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