Componente ListBox en MATLAB GUI

MATLAB es un entorno informático basado en arrays con su propio lenguaje de programación que es fácil de aprender y usar. Con la ayuda de la interfaz gráfica de usuario GUI de MATLAB, se utiliza para comprender ideas matemáticas complejas y grandes conjuntos de datos.

Los cuadros de lista son elementos de la interfaz de usuario que muestran los elementos de una lista. La apariencia y el comportamiento de un cuadro de lista están controlados por sus propiedades. Para referirse a un objeto o propiedad específica.

Ejemplo 1:

% MATLAB Code
function dataselectionbox
fig = uifigure('Position',[200 200 650 475]);
 
% Making a Numeric Edit Field
ef = uieditfield(fig,'numeric',...
    'Position',[250 180 200 44]);
 
% Making a List Box
lbox = uilistbox(fig,...
    'Items', {'GFG1', 'GFG2', 'GFG3', 'GFG3'},...
    'ItemsData', [0, 25, 40, 100],...
    'Position',[250 240 200 156],...
    'ValueChangedFcn');
 
% Callback to a function that has had its value changed
function selectionChanged(src,event)
    % In the edit field, show the data from the list box.
    ef.Value = src.Value;
end
 
end

Producción:

Seleccione un elemento de la lista con selección de datos. La temperatura vinculada con la selección se actualiza en el cuadro de edición numérico.

Ahora vemos la aplicación basada en GUI de ListBox en MATLAB. Para ello seleccionamos la opción Design App con la opción ListBox en MATLAB.

Ejemplo 2:

% MATLAB code for ListBox GUI
classdef appList < matlab.apps.AppBase
 
    % Properties that correspond to app components
    properties (Access = public)
        UIFigure                matlab.ui.Figure
        ListBoxGUIdemoLabel     matlab.ui.control.Label
        EditField3              matlab.ui.control.NumericEditField
        ResultLabel             matlab.ui.control.Label
        EnterSecondNumberLabel  matlab.ui.control.Label
        EnterFirstNumberLabel   matlab.ui.control.Label
        EditField2              matlab.ui.control.EditField
        EditField               matlab.ui.control.EditField
        ListListBox             matlab.ui.control.ListBox
        ListListBoxLabel        matlab.ui.control.Label
    end
 
    % Callbacks that handle component events
    methods (Access = private)
 
        % Callback function
        function CSESubjectListBoxValueChanged(app, event)
 
        end
 
        % Value changed function: ListListBox
        function List1.ListBoxValueChanged(app, event)
            value = app.List1.ListBox.Value;
             value = get(handles.ListBox,'value');
            A Label = get(handles.edit1.'String');
            B label = get(handles.edit1.'String');
            A Label = Str2num(A);
            B Label = Str2num(B);
        end
    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 = 'MATLAB App';
 
            % Create ListListBoxLabel
            app.ListListBoxLabel = uilabel(app.UIFigure);
            app.ListListBoxLabel.HorizontalAlignment = 'right';
            app.ListListBoxLabel.Position = [73 178 48 22];
            app.ListListBoxLabel.Text = 'List ';
 
            % Create ListListBox
            app.ListListBox = uilistbox(app.UIFigure);
            app.ListListBox.Items = {'Add', 'Sub', 'Multiply', 'Division'};
            app.ListListBox.ValueChangedFcn = createCallbackFcn(app,
            @ListListBoxValueChanged, true);
            app.ListListBox.Position = [186 63 284 149];
            app.ListListBox.Value = 'Add';
 
            % Create EditField
            app.EditField = uieditfield(app.UIFigure, 'text');
            app.EditField.Position = [307 356 163 45];
 
            % Create EditField2
            app.EditField2 = uieditfield(app.UIFigure, 'text');
            app.EditField2.Position = [307 303 163 44];
 
            % Create EnterFirstNumberLabel
            app.EnterFirstNumberLabel = uilabel(app.UIFigure);
            app.EnterFirstNumberLabel.Position = [73 356 156 45];
            app.EnterFirstNumberLabel.Text = 'Enter First Number';
 
            % Create EnterSecondNumberLabel
            app.EnterSecondNumberLabel = uilabel(app.UIFigure);
            app.EnterSecondNumberLabel.Position = [71 303 132 44];
            app.EnterSecondNumberLabel.Text = 'Enter Second Number';
 
            % Create ResultLabel
            app.ResultLabel = uilabel(app.UIFigure);
            app.ResultLabel.Position = [73 242 178 36];
            app.ResultLabel.Text = 'Result';
 
            % Create EditField3
            app.EditField3 = uieditfield(app.UIFigure, 'numeric');
            app.EditField3.Position = [307 231 163 43];
 
            % Create ListBoxGUIdemoLabel
            app.ListBoxGUIdemoLabel = uilabel(app.UIFigure);
            app.ListBoxGUIdemoLabel.BackgroundColor = [0.3922 0.8314 0.0745];
            app.ListBoxGUIdemoLabel.FontWeight = 'bold';
            app.ListBoxGUIdemoLabel.Position = [71 426 420 33];
            app.ListBoxGUIdemoLabel.Text = 'List Box GUI demo';
 
            % Show the figure after all components are created
            app.UIFigure.Visible = 'on';
        end
    end
 
    % App creation and deletion
    methods (Access = public)
 
        % Construct app
        function app = appList
 
            % 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

Producción: