zoom2cursor

Dynamic, scalable zoom following the motion of the cursor; also displays the current position.

Description

% FUNCTION ZOOM2CURSOR
% ZOOM2CURSOR, without arguments, will activate the current axis, create a text box showing the current position of the mouse pointer (similar to pixval), and automatically zoom the image to the location of the cursor as it is moved. The zoomed display dynamically scrolls with the motion of the cursor.
%
% By default, the function zooms to 50% of the image in the axis.
%
% BUTTON CLICKS:
% Left-clicking will zoom in further, and right-clicking will zoom out.
% Shift-clicking (or simultaneously clicking the left and right mouse buttons) at any point will display the original (un-zoomed) image, as will moving the cursor outside of the current axis. The zoom percentage is restored when the mouse is moved.
% Double-clicking zooms out to the original image, modifying the zoom percentage.
%
% Tested under R12.1 and R13.
%
% Written by Brett Shoelson, Ph.D. ([e-mail], [e-mail])
% 12/26/02
% 2/16/03; Rev 2: Program is more robust; fixes a bug when window is resized.
%Incremental increase/decrease in zoom percent (on mouseclick) has been reduced.
%ALSO: Now works with images, surfaces, lines (and thus plots), and patches (rather than just images)

• Acknowledgements: This submission has inspired the following:; zinput
• MATLAB release: MATLAB 6.5 (R13)

[Paul Koola]

Excellent feature for Visual data exploration.

[Berthold Käferstein]

Very cool utility to simplify the work with plots!

[Andy Bliss]

Very nice! I was contemplating writing something like this, but I was glad to find that someone else had already accomplished the daunting task.

[Anne Carpenter]

Nice work! Just what I needed, and it works great on R14 on a Mac.

[Plamen Stoyanov]

 

[paul calvert]

VERY VERY VERY nice!!
A nice improvement would be to have an 'escape' mode to allow selecting a different figure or subplot ..or just plain 'exit' of the function....

[Engamba Bobin]

Very good work. Will help me greatly.
How do you exit, assuming you can? Or do you just have to close the figure?

[Moshe Ufnik]

Very elegant

[Ahmad Samy]

Excellent usage of figure handles.
Waiting for your next work

[Charles Attard]

Very useful, thanks.
For those wondering how to exit the function, just click on 'X'.

I've found useful to create a 'exit_zoom2cursor' function.
If you're interested, comment the statement 'endbutton = ...'
And call this function:

function exit_zoom2cursor
zoomparams = getappdata(gcf,'zoomparams');
if isempty(zoomparams)
    return;
end;
set(gcf,'windowbuttonmotionfcn',zoomparams.oldwbmf);
set(zoomparams.currax,'units',zoomparams.oldaxunits,'xlim',zoomparams.oldxlim,'ylim',zoomparams.oldylim);
set(get(zoomparams.currax,'children'),'buttondownfcn',zoomparams.bdfcnold,'busyaction',zoomparams.baold);
set(gcf,'pointer',zoomparams.oldpointer,'doublebuffer',zoomparams.dbold);