Get Zoom Handle for UIAxes/Axes when using App Designer

I am developing an application using App Designer, and I am unable to obtain the zoom handle when using 'zoom'.

out = zoom(UIFigurehandle)

Returns the exception 'UI figure not supported as an input to zoom. Specify UIAxes or Axes in a UI figure instead.'

out = zoom(UIAxeshandle) 

or

out = zoom(Axeshandle) 

Returns the exception 'Incorrect number of input arguments.'

I can enable zoom using:

zoom(UIAxeshandle, 'on')

Which works as expected, but as per the documentation it wont return an output (it throws 'Output argument "out" (and maybe others) not assigned during call to "zoom".' if I try).

Using simply:

out = zoom()

Opens a new figure, but returns the handle.

How can I obtain the zoom handle when using app designer? I need it to be able to set the callback and other options, but right now I cannot find a way to do so.

[Ned]

try using

zoom(app.UIFigurehandle)

where UIFigurehandle is the figure name.

[RichardW]

Thank you, but that is what I used in my example above. Within app designer both my call to the figure handle and uiaxes/axes handles are contained within 'app'.

[Ankit]

zoom(app.UIFigurehandle) throws an error as already mentioned by Richard.

Answer 1

[Ned]

You can't. As at 2017a pertaining to UIAxes, "zoom only supports the 'on' , 'off', and factor arguments."

[RichardW]

That is disapointing. I have created my own zoom but it is very slow and redundant. Would be good to have these features rather than having to reinvent the wheel.

[Ned]

Have you considered using axtoolbar ? Or changing the toolbar property of the UIAxes object? Or does this not suit your needs?

[RichardW]

I need access to a callback in relation to zoom functionality, so I don't think axtoolbar or toolbar properties will help. axtoolbar callbacks seem to be in relation to button selection, whereas I want a callback to be flagged while zoom is being performed.