Need to extract data and exit function - my function never ends

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Myles
Myles 2012-6-27
I have a function which allows me to draw a line over top of a current figure. The function begins by plotting a point and then continuously updates a second point to draw a dynamic line which leads to the current mouse location - which then terminates if the user right clicks. My problem is that when I run this function within another script, that script skips over the function before it finishes - in fact I don't think the function is able to end the way I have it written, but I'm still relatively novice at MATLAB and can't figure out how to fix my code for this problem. I'm also extracting the information for the line by using getappdata and setappdata, which probably isn't the best way to do it. Any help would be greatly appreciated, Thanks.
%% ---------------------------------------------------------
function [x,y] = junk
% axis([0 10 0 10])
hold on
f=gcf;
[x,y] = ginput(1);
hl = line(x,y);
ah = gca;
set(ah, 'DrawMode', 'fast');
set(f,'WindowButtonMotionFcn',@movingLine);
function [xdat,ydat] = movingLine(src,~)
[xn,yn] = disp_point(ah);
xdat = [x,xn];
ydat = [y,yn];
set(hl,'XData',xdat,'YData',ydat);
set(f,'WindowButtonDownFcn', @outputLines)
function [xdat,ydat] = outputLines(src,evnt)
if strcmp(get(src,'SelectionType'),'alt')
xdat = [x,xn];
ydat = [y,yn];
set(hl,'Xdata',xdat,'Ydata',ydat)
setappdata(src, 'hLine', hl);
set(f, 'WindowButtonDownFcn','')
set(f, 'WindowButtonMotionFcn','')
end
end
function [x,y] = disp_point(ah)
cp = get(ah,'CurrentPoint');
x = cp(1,1);y = cp(1,2);
end
end

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采纳的回答

Walter Roberson
Walter Roberson 2012-6-27
After your line
set(f,'WindowButtonMotionFcn',@movingLine);
add
uiwait(f, 'WindowButtonMotionFcn')
This tells it to wait until f's WindowButtonMotionFcn property changes, which is something that you do in the callback when you got the data you need.
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Walter Roberson
Walter Roberson 2012-6-27
Darn, and I even had the waitfor() documentation open when I mis-typed that!

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