Callback to edit box to update variable

13 次查看（过去 30 天）
Mckenna Relling
Mckenna Relling 2022-2-21
回答： Voss 2022-2-22
I have begun my program by defining a variable Ground, where Ground=40. I have a ui text field corresponding to this variable, and when a user edits the text field by typing a number, I want my callback function to update the value of the Ground variable in my workspace. How can this be done? Below is what I have written, which does not work.
Ground=40;
ground_control=uicontrol('Style','edit', 'String', num2str(Ground), 'Position', [315, 70, 70, 20], 'Callback', {@change_ground});
function [Ground] =change_ground(hObject, eventdata, handles)
Ground=str2double(hObject);
end

请先登录，再回答此问题。

回答（1 个）

Voss
Voss 2022-2-22
It's not typically necessary (or a good idea) to have data in a UI mirrored in the base workspace, but here's how you can do it (for educational purposes).
Ground=40;
ground_control=uicontrol('Style','edit', 'String', num2str(Ground), 'Position', [315, 70, 70, 20], 'Callback', {@change_ground});
function change_ground(hObject, eventdata, handles)
Ground = str2double(get(hObject,'String'));
assignin('base','Ground',Ground);
end
Typically your uicontrol would be part of a larger GUI that would be handling all the data, so that's why you wouldn't need to do this.

类别

在 Help Center 和 File Exchange 中查找有关 Environment and Settings 的更多信息

标签

产品


版本

R2019b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by