MATLAB: Zooming resizes axes

guizoom

Dear all,
I am working on my first GUI and already [edited] beginning to love it [until here] 🙂 I am not managing it to obtain stable axes. Here is my code [now edited again, sorry].
Take this as input:
[X,Y] = meshgrid(1:200,1:100);
A = [peaks(100) peaks(100)];
This is the function:
function [] = mygui(X,Y,A)
% place data in structure array so that it is available to each subfunction
S.data.X = X;
S.data.Y = Y;
S.data.A = A;
% set up figure
S.fh = figure('units','pixels',...
              'position',[100 100 800 600],...
              'menubar','none',...
              'name','Manual carving tool',...
              'numbertitle','off',...
              'resize','off',...
              'toolbar','figure');
% set up zoom toolbar
S.tbh  = findall(S.fh,'Type','uitoolbar');  
S.tbhb = findall(S.tbh);
delete(S.tbhb([2:9 13:end]));
S.tbhb = S.tbhb(10:12);
% axes
S.ax = axes('parent',S.fh,...
            'Units','pixels',...
            'DataAspectRatio',[1 1 1],...
            'DataAspectRatioMode','manual',...           
            'OuterPosition',[0 0 600 600],...
            'Position',[0 0 600 600],...
            'Xlimmode','auto',...
            'Ylimmode','auto',...
            'PlotBoxAspectRatio',[1 1 1],...
            'PlotBoxAspectRatioMode','manual',...
            'Visible','on',...
            'Layer','top',...
            'Box','on',...
            'Visible','on');
% display A in axes
S.im = image('parent',S.ax,...
             'XData',X(1,:),...
             'YData',Y(:,1),...
             'CData',A,...
             'CDataMapping','scaled',...
             'visible','on');
So if I now zoom in, the axes position remains at [0 0 600 600], then, if I zoom out and the image extent becomes smaller than the axes, the axes tighten around the image. If I doubleclick on the image, the original position of the axes appears again. However, I would like the axes to remain at the same position always, disregarding the "zoom history". I am using R2011b on Windows.
Thanks for your help, Anon

Best Answer

UPDATE Add this to the bottom of your mfile:
%Setup         
set(S.ax,'ylimmode','auto','xlimmode','auto'); %reset after image detroyed
h = zoom(S.ax); %build zoom object
zoom reset; %store current setting
set(h,'ActionPostCallback',{@mypostcallback,h}); %set callback
function mypostcallback(~,~,h) 
zdir = get(h); get the handle
if(strcmp(zdir.Direction,'out')) %is it going out?
    set(h,'ActionPostCallback',[]); %disable the call back to zoom out
    zoom('out'); %zoom to original spot
    set(h,'ActionPostCallback',{@mypostcallback,h}); %re-enable the callback
end
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