(1) Two possibilities to reset your app to its default state:
I prefer the first. A simple example using a function called resetComponents:
classdef app1 < matlab.apps.AppBase
% Properties that correspond to app components
properties (Access = public)
UIFigure matlab.ui.Figure
EditFieldLabel matlab.ui.control.Label
EditField matlab.ui.control.EditField
Button matlab.ui.control.Button
end
% Component initialization
methods (Access = private)
% Create UIFigure and components
function createComponents(app)
% Create UIFigure and hide until all components are created
app.UIFigure = uifigure('Visible', 'off');
app.UIFigure.Position = [100 100 640 480];
app.UIFigure.Name = 'UI Figure';
% Create EditFieldLabel
app.EditFieldLabel = uilabel(app.UIFigure);
app.EditFieldLabel.HorizontalAlignment = 'right';
app.EditFieldLabel.Position = [382 282 56 22];
app.EditFieldLabel.Text = 'Edit Field';
% Create EditField
app.EditField = uieditfield(app.UIFigure, 'text');
app.EditField.Position = [453 282 100 22];
% Create Button
app.Button = uibutton(app.UIFigure, 'push');
app.Button.Position = [129 282 100 22];
app.Button.Text = 'Reset';
app.Button.ButtonPushedFcn = @app.resetButtonCallback;
% Show the figure after all components are created
app.UIFigure.Visible = 'on';
end
function resetComponents(app)
% Create EditFieldLabel
app.EditFieldLabel = uilabel(app.UIFigure);
app.EditFieldLabel.HorizontalAlignment = 'right';
app.EditFieldLabel.Position = [382 282 56 22];
app.EditFieldLabel.Text = 'Edit Field';
% Create EditField
app.EditField = uieditfield(app.UIFigure, 'text');
app.EditField.Position = [453 282 100 22];
% Create Button
app.Button = uibutton(app.UIFigure, 'push');
app.Button.Position = [129 282 100 22];
app.Button.Text = 'Reset';
app.Button.ButtonPushedFcn = @app.resetButtonCallback;
% Or, alternatively, instead of redefining each component, just figure out all
% properties which could be changed by the user and reset them to their
% defaults:
%
% app.EditField.Value = '';
%
% Simpler here, but takes more work for more complicated apps.
end
function resetButtonCallback(app, ~, ~)
resetComponents(app);
end
end
% App creation and deletion
methods (Access = public)
% Construct app
function app = app1
% Create UIFigure and components
createComponents(app)
% Register the app with App Designer
registerApp(app, app.UIFigure)
if nargout == 0
clear app
end
end
% Code that executes before app deletion
function delete(app)
% Delete UIFigure when app is deleted
delete(app.UIFigure)
end
end
end
(2) You can access a callback function if you have access to an instance of the app and you are calling from a location allowed by the function's Access attribute (e.g. Public, Private, etc).
Example 1: You cannot call a callback function from within a static method, because the static method does not have access to an instance of the app.
Example 2: You cannot call a callback function externally if its Access attribute is Private.
