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

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?

Answer 1

[Walter Roberson]

Unfortunately you will need to go right back to the figure callbacks.

My tests indicate that WindowButtonMotionFcn and WindowScrollWheelFcn continue to work with imshow()

[Aaron Globisch]

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]

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?