How can I share data in nested functions of a GUI?

Hello, I'm not able to share data among nested functions of a GUI using the figure handle, namely the number of clicks on a figure. I'm able to do it only using a global variable. How could I use the handle instead of the global variable? Many thanks! This is my code:

I first define the global variable and then run the function in the workspace:

>>global globalVar >>h = shareData

Then here are the nested functions:

function handle=shareData() fprintf('Starting GUI\n') handle.fig = figure(); global globalVar; globalVar.Nclicks=0; handle.Nclicks=0; fprintf('Before set\n') globalVar handle set(handle.fig,'WindowButtonDownFcn',{@clickPosition,handle})

function handle=clickPosition(hObject, eventdata, handle) global globalVar; get(handle.fig,'CurrentPoint'); globalVar.Nclicks=globalVar.Nclicks+1; handle.Nclicks=handle.Nclicks+1; if globalVar.Nclicks==1 fprintf('After 1 click\n') else fprintf(['After ' , num2str(globalVar.Nclicks), ' clicks\n']) end globalVar handle

[Jan]

Please follow the "? Help" link to learn how to format code in the forum. Thanks!

Answer 1

[Jan]

There are many many threads concerning sharing data between functions of a GUI in this forum. Therefore I suggest to search for "share data gui":

http://www.mathworks.com/matlabcentral/answers/?term=share+data+gui

[Mario]

I should have missed these post before. I'm using the "evalin" and "assignin" functions. Thanks a lot!

[Jan]

EVALIN and ASSIGNIN are a kind of remote control. It is much harder to keep the overview with them and debugging gets extremely hard, because it cannot determined directly, which line of code is responsible for the last changes.

Answer 2

[Arthur]

evalin and assignin are generally speaking not great ways to do this. Have a look at getappdata & setappdata. Have a look at this video:

http://blogs.mathworks.com/videos/2011/11/23/passing-data-between-guide-callbacks-without-globals-in-matlab/