How to keep the zoom active as long as a key is pressed?

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Vlad Atanasiu
Vlad Atanasiu 2015-5-30
评论： Walter Roberson 2016-6-5
I want the zoom to be activated by pressing a key and stay active as long as the key is pressed. With the following code, unfortunately, the zoom is activated at key press, then focus is transferred from the figure to the command window, and the pressed key is output at the command line as long as hold down. Any suggestion for a solution?
The utility of keeping the zoom active by key press is to have a faster entry/exit in zoom mode than clicking on the two toolbar icons.
function zoomOnKeyPress()
figure(...
'KeyPressFcn', @KeyPressFcn, ...
'KeyReleaseFcn', @KeyReleaseFcn);
function KeyPressFcn(h,e)
zoom on
hf = gcf;
hf.Color = 'red'; % show that we are here
function KeyReleaseFcn(h,e)
zoom off
hf = gcf;
hf.Color = 'green'; % show that we are here

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回答（1 个）

Walter Roberson
Walter Roberson 2015-5-31
  4 个评论
显示 2更早的评论
Igor
Igor 2016-6-4
编辑：Igor 2016-6-4
If anyone is still looking for an answer - the difference between R2014b and older versions is not very large - the fix is described here. For a more complete example, take a look at this submission.

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