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

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Mario 2013-9-11

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https://ww2.mathworks.cn/matlabcentral/answers/86887-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

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Jan 2013-9-11

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

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Answer 1

Jan 2013-9-11

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/86887-how-can-i-share-data-in-nested-functions-of-a-gui#answer_96433

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

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Mario 2013-9-11

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

Jan 2013-9-12

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.

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