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From: andrea on 22 Apr 2010 09:56
Hi at all,

I visulize an image in a figure.
Now I want when the user clicks on the left button of the mouse the point is red; if the user clicks the right button the point is yellow.
How it works?

Thanks in advace

Andrea
From: Steven Lord on 22 Apr 2010 10:20

"andrea " <nacchio1983(a)yahoo.it> wrote in message
news:hqpki4$2gc$1(a)fred.mathworks.com...
> Hi at all,
>
> I visulize an image in a figure. Now I want when the user clicks on the
> left button of the mouse the point is red; if the user clicks the right
> button the point is yellow.
> How it works?

Look at the SelectionType property of the figure and the CurrentPoint
property of the axes to determine which element of your image to modify and
to what color it should be modified, then update the image's CData property
appropriately. If you encounter problems doing so, post your code and a
(small, say 5-by-5) image and explain what problem you're seeing.

--
Steve Lord
slord(a)mathworks.com
comp.soft-sys.matlab (CSSM) FAQ: http://matlabwiki.mathworks.com/MATLAB_FAQ


From: Jan Simon on 22 Apr 2010 10:28
Dear Andrea!

> I visulize an image in a figure.

Please define "image" with more details.

> Now I want when the user clicks on the left button of the mouse the point is red; if the user clicks the right button the point is yellow.

Please define "point" with more details. Do you want to add a point? Is the point a part of a line object?

Kind regards, Jan
From: Beskie on 22 Apr 2010 13:57
Try adjusting this code into your program

function main

axes(handles.axes1);
set(get(handles.axes1,'children'),'hittest','off');
set(handles.axes1,'ButtonDownFcn',{@AxesCallback,handles});

end

function AxesCallback(src,eventdata,handles)

TempPoint = get(handles.axes1,'CurrentPoint');

switch get(gcf,'selectiontype')
case 'normal'%left mouse button click
hold on
plot(TempPoint(1,1),TempPoint(1,1),'o','MarkerSize',
10,'MarkerFaceColor','r')
hold off
case 'alt'%right mouse button click
hold on
plot(TempPoint(1,1),TempPoint(1,1),'o','MarkerSize',
10,'MarkerFaceColor','y')
hold off
end
end
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