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Is there a possibility to recognize right clicks in image objects?

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Aaron Globisch
Aaron Globisch 2016-11-26
评论： Walter Roberson 2016-11-27
I am trying to dispay a DICOM stack so that the user can go through the stack one by one. My problem is, I cant figure out how I get information about the user using right or left clicks, mouse wheel up and down or arrow keys. The program is supposed to pull the user input in a while loop and either increments or decrements the current_slice variable.
while 1
for current_slice = 1:slices
current_figure = imshow(squeezed_data(:,:,current_slice), [0 global_max]);
while 1
% magic happens here
break;
end
end
close all;
break;
end
I know there is the implay() function, but it does not display the slices as good as imshow() or imtool(). Unfortunately, as far as I know, imtool() has no properties I clould access while imshow() just offers 'ButtonDownFcn' what causes a leftclick callback. Since using imshow() it changes my figure properties to image properties, so I can't use the Keyboard or Mouse Controll functions. Otherwise I could use set() to get key presses etc. Is there a a possibillity to get user input or something similar?

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回答（1 个）

Walter Roberson
Walter Roberson 2016-11-27
Unfortunately you will need to go right back to the figure callbacks.
My tests indicate that WindowButtonMotionFcn and WindowScrollWheelFcn continue to work with imshow()
  2 个评论
Aaron Globisch
Aaron Globisch 2016-11-27
Hello Walter, first of all thank you for helping me.
Now I am just trying to get used to callbacks but I keep getting this error message:
Function 'subsindex' is not defined for values of class 'function_handle'.
Error in new_program (line 31)
current_figure('WindowScrollWheelFcn', @mwheel_callback);
I know subsindex converts an object into an integer index but this doesn't help me. I built my callback like
function mwheel_callback( object, callbackdata )
if callbackdata.VerticalScrollCount < 0
disp('Yet I dont know how but this should return -1');
elseif callback.VerticalScrollCount > 0
disp('+1');
% value = +1;
end
end
it is built in the example aviable in WindowScrollWheelFcn — Mouse-scroll-wheel callback in the figure documentation.
My input loop now looks just like this:
while 1
current_figure('WindowScrollWheelFcn', @mwheel_callback);
end
Do you know why it throws this error?
Walter Roberson
Walter Roberson 2016-11-27
Your current_figure is an array so it thinks the handle reference is a subscript attempt.
I do not recognize what "current_figure" is intended to do?

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