How to Update Label Text from Custom Function in AppDesigner?

Question

Arda Kayaalp 2022-10-3

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1816365-how-to-update-label-text-from-custom-function-in-appdesigner

评论： Ergin Sezgin 2022-10-3

Hello everyone! I have custom analysing function that analyses the directory. I am calling this function from the main GUI app in AppDesigner. The function that I am calling from the main app has the following structure,

    function analyse_result = analyse(path_dir)
        objects = objects_in_dir(path_dir)
        for ii = 1:length(objects)
            do_something
        end
    end

Now I've added a label text on the gui and called ProgressLabel. What I want to do is to update this label inside the function body, so I've updated the function like so,

    function analyse_result = analyse(path_dir,app.ProgressLabel.Text)
        objects = objects_in_dir(path_dir)
        for ii = 1:length(objects)
            do_something
            app.ProgressLabel.Text = sprintf("Iteration: %%u",(ii/length(objects))*100)
        end
    end
    
    

But when I'm calling this updated function from the main gui with added new variable, nothing changes on the text label. How can I solve this issuse?

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Ergin Sezgin 2022-10-3

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1816365-how-to-update-label-text-from-custom-function-in-appdesigner#answer_1065525

在 MATLAB Online 中打开

Hello Arda,

Try using drawnow to update figures and callbacks as the following:

    function analyse_result = analyse(path_dir,app.ProgressLabel.Text)
        objects = objects_in_dir(path_dir)
        for ii = 1:length(objects)
            do_something
            app.ProgressLabel.Text = sprintf("Iteration: %%u",(ii/length(objects))*100)
            drawnow
        end
    end
    

Same is necessary for other operations such as while loop terminations via a button.

6 个评论
显示 4更早的评论隐藏 4更早的评论

Arda Kayaalp 2022-10-3

编辑：Arda Kayaalp 2022-10-3

在 MATLAB Online 中打开

Hello Ergin, thanks for the quick reply. I used % delibaretely to include % sign. Objects variable is not empty and for loop works through all of the iterations. But I think there is a problem where I pass the input variables for the function. I inserted breakpoints in the mainapp to see the workspace variables and saw that the app.ProgressLabel.Text variable does not pass through. How can I solve this? app.ProgressLabel.Text is global, I changed the function input as,

function analyse_result = analyse(path_dir,progressObject)
    objects = objects_in_dir(path_dir)
    for ii = 1:length(objects)
        do_something
        progressObject = sprintf("Iteration: %%u",(ii/length(objects))*100)
        drawnow
    end
end

and tried again. In the main gui I passed variables to the function as

analyse(path_dir,app.ProgressLabel.Text)

But this didn't solve the issue. progressObject shows empty in the workspace. I cannot pass through a global GUI variable to function variable.

Arda Kayaalp 2022-10-3

Silly of me, I couldn't see the app structure. Thanks a lot, it worked!

Ergin Sezgin 2022-10-3

I'm happy that it worked, you are welcome.

请先登录，再进行评论。

How to Update Label Text from Custom Function in AppDesigner?

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

采纳的回答

6 个评论
显示 4更早的评论隐藏 4更早的评论

更多回答（0 个）

另请参阅

类别

标签

产品

版本

Community Treasure Hunt

How to Update Label Text from Custom Function in AppDesigner?

0 个评论 显示 -2更早的评论隐藏 -2更早的评论

采纳的回答

6 个评论 显示 4更早的评论隐藏 4更早的评论

更多回答（0 个）

另请参阅

类别

标签

产品

版本

Community Treasure Hunt

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

6 个评论
显示 4更早的评论隐藏 4更早的评论