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From: shaaneahmed Raza on 28 Apr 2010 18:39
HI,
I am working on a GUI.
What I want to do is to click the image and display some text on that location in the image;
The ButtonDownFcn does not work with imshow command
The same code works if I replace imshow with imagesc command.
The code is given below.

i=imread('cameraman.tif');
handles.input=im2double(i);
axes(handles.input_axes);
a = get(gca,'ButtonDownFcn');
h = imshow(handles.input,'Parent',gca);
set(h,'HitTest','off');
set(gca,'ButtonDownFcn',a);

In the ButtonDownFcn I have the following code

a = get(gca,'CurrentPoint' );
text(a(1,1),a(1,2),'A');
From: Matt Fig on 28 Apr 2010 19:01
I don't have the IPT, but if I had to guess I would say you should be setting the buttondownfcn to the image object, not the axes. For example, this works:




function [] = image_prob()
X = load('clown');
IM = ind2rgb(X.X,X.map);
h = image(IM,'Parent',gca); %Also with: h = imagesc(IM,'Parent',gca);
set(h,'ButtonDownFcn',{@ax_bdfcn});

function [] = ax_bdfcn(varargin)
a = get(gca,'CurrentPoint' );
text(a(1,1),a(1,2),'A');
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