get on click coordinates from a plot (multiple times)

Heyho,

the function [x,y]= ginput (n) gives back the x and y data of the curse position while clicking. The Problem: I want to give the user the possibility to click multiple times in a row. However, I need the click to have a direct effect.

So if n>1 the function waits for n clicks to be done before returning the x/y Data.I want to click --> get Values --> click --> get values --> click on the button --> finish. My idea was to use a Pushbutton which sets the ginput into an eternal loop, which can be broken be clicking agian.

function CollectePointsButton_Callback(hObject, eventdata, handles) 

           Counter = getappdata(hObject,'Counter');
           if isempty(Counter) == 1;
           Counter = 0;
           end

           Data = findobj('type','axes');

           set(Data,'buttondownfcn',@ClickToCollecte); 
           Counter = Counter +1;
           setappdata(handles.CollectePointsButton,'Counter',Counter);

 function ClickToCollecte (gcbo,evendata,handles) 

                          Data = findobj('tag','CollectePointsButton');
                          Counter = getappdata(Data,'Counter') 

                           while mod(Counter,2) == 1

                           Data = findobj('tag','CollectePointsButton');
                           Counter = getappdata(Data,'Counter') 

                           [x,y] = ginput(1);
                            end

Answer 1

[Mischa Kim]

Hello Max, check out this answer.

It uses left-mouse clicks to collect data and a right-mouse click to finish collecting data.

[Max Müller]

this Code is really good. I guess i can us it this way:

button = 1;
 while sum(button) <=1   % read ginputs until a mouse right-button occurs
   [x,y,button] = ginput(1)
 end

Can u pls explain me why it works ? So i can use it more often,

[Mischa Kim]

ginput reads position values as long as you keep using the left-mouse button ( button = 1 ). As soon as you use the right-mouse button, button = 3, and the loop is exited.

[Max Müller]

cool thanks