MATLAB: How to write in edit field

app designeredit field

hello

i'm new to matlab can you help me

in app designer i want to write ip address in edit field

here is the showen function, what i have to write inside it?

 function CameraIPEditFieldValueChanged(app, event)
            
        end

thank you

Best Answer

Hi! What you're showing in your question is the callback function for the CamperaIP edit field. This function is called whenever you type something new into that edit field while running your app. If you're interested in storing whatever you type into this field for use in other parts of the app, you could have a property (for example, let's call the property "CameraIP") that you store the edit field value in. Then in the callback function you are showing, you could do the following:

function CameraIPEditFieldValueChanged(app, event)
      app.CameraIP=app.CameraIPEditField.Value;      
end

In this function, the property "CameraIP" will get updated anytime you type something new into this edit field. Then in other places throughout the app, you can reference app.CameraIP to use whatever value is stored in this property.

If you want to have a starting IP address in that edit field, in your startupFcn callback you could do the following:

function startupFcn(app)
    app.CameraIPEditField.value='0.000.00.000';%enter whatever IP address you want here
end

Whenever you run the app, your edit field will start out filled with this IP address.

If you're having trouble writing new values to this edit field, make sure the edit field component is set as "editable." You can field this option in the Component Browser in the Design View within app designer.

Hope this helps!

Related Solutions

MATLAB: CellSelectionCallback-update column name

Well, yes, for what you want to do to work, you need a way to update your UI_Column dialog whenever your CellSelectionCallback is called. At the moment, there's nothing that tells the dialog that the selection has changed.

One way to do that is to keep around the handle to the edit control in that dialog and update it in the CellSelectionCallback:

classdef app2 < matlab.apps.AppBase
    % Properties that correspond to app components
    properties (Access = public)
        UIFigure              matlab.ui.Figure
        Panel                 matlab.ui.container.Panel
        addrowButton          matlab.ui.control.Button
        UITable               matlab.ui.control.Table
        addcolumnButton       matlab.ui.control.Button
        editnamecolumnButton  matlab.ui.control.Button
    end
    properties (Access = private)
        Data_temp=[] % Description
        UI_ColumnOldName;   % UItextarea for Selecting column name to edit
        UI_ColumnNewName;   % UItextarea for input of new column name
    end
    methods (Access = private)   
        function name_col(app,new_name) % new name column

                 app.UITable.ColumnName{(app.Data_temp(2))}=char(new_name.Value);
        end        
        function SetSelectionName(app) % select old name column
            if isgraphics(app.UI_ColumnOldName)   %edit dialog is not live is the handle is not valid
                app.UI_ColumnOldName.Value = app.UITable.ColumnName{(app.Data_temp(2))};
                app.UI_ColumnNewName.Value = app.UI_ColumnOldName.Value;
            end
        end        
    end
    methods (Access = private)
        % Code that executes after component creation
        function startupFcn(app)
            app.UITable.Data=cell(10,3); % default table
            app.UITable.ColumnEditable=true; 
            app.UITable.ColumnName ={'A','B','C'}; % default name
        end
        % Cell selection callback: UITablea
        function UITableCellSelection(app, event)
            app.Data_temp=event.Indices; % salva gli indici nella proprietà Data_temp (creata dall'utente)UITableCellSelection(app);
            app.SetSelectionName;
            
        end
        % Button pushed function: addcolumnButton
        function addcolumn_ButtonPushed(app, ~)
                 app.UITable.Data(:,end+1)={''}; % add column
                 column_name=char(inputdlg('column name'));
                 app.UITable.ColumnName{end+1}=column_name;
        end
        % Button pushed function: addrowButton
        function addrow_ButtonPushed(app, ~)
               app.UITable.Data(end+1,:)={''}; % add row below
        end
        % Button pushed function: editnamecolumnButton
        function editnamecolumn_ButtonPushed(app, ~)
            
            if isempty(app.Data_temp)
                 warndlg('select a cell below the desidered column'); % warning: app.Data_temp is empty
                 
            else
                UI_Column=uifigure('Name','Column Name','Position',[100 100 429 276]);
                app.UI_ColumnOldName=uitextarea(UI_Column,'Position',[100 140 100 22]);
                app.UI_ColumnNewName=uitextarea(UI_Column,'Position',[220 140 100 22]); % new name column
                UI_label=uilabel(UI_Column,'Text','new column name','Position',[220 165 100 22]);
                UI_label_2=uilabel(UI_Column,'Text','old column name','Position',[100 165 100 22]);
                UI_save=uibutton(UI_Column,'Text','Save','Position',[220 100 100 22],'ButtonPushedFcn',@(UI_save,event) name_col(app,new_name)); % change and save new column name                                
                app.SetSelectionName;  %update textarea controls
            end
        end
    end
    % App initialization and construction
    methods (Access = private)
        % Create UIFigure and components
        function createComponents(app)
            % Create UIFigure
            app.UIFigure = uifigure;
            app.UIFigure.Position = [100 100 697 560];
            app.UIFigure.Name = 'UI Figure';
            % Create Panel
            app.Panel = uipanel(app.UIFigure);
            app.Panel.Title = 'Panel';
            app.Panel.Position = [114 113 495 382];
            % Create addrowButton
            app.addrowButton = uibutton(app.Panel, 'push');
            app.addrowButton.ButtonPushedFcn = createCallbackFcn(app, @addrow_ButtonPushed, true);
            app.addrowButton.Position = [23 271 100 22];
            app.addrowButton.Text = 'add row';
            % Create UITable
            app.UITable = uitable(app.Panel);
            app.UITable.ColumnName = {'Column 1'; 'Column 2'};
            app.UITable.RowName = {};
            app.UITable.CellSelectionCallback = createCallbackFcn(app, @UITableCellSelection, true);
            app.UITable.Position = [152 108 302 185];
            % Create addcolumnButton
            app.addcolumnButton = uibutton(app.Panel, 'push');
            app.addcolumnButton.ButtonPushedFcn = createCallbackFcn(app, @addcolumn_ButtonPushed, true);
            app.addcolumnButton.Position = [24 230 100 22];
            app.addcolumnButton.Text = 'add column';
            % Create editnamecolumnButton
            app.editnamecolumnButton = uibutton(app.Panel, 'push');
            app.editnamecolumnButton.ButtonPushedFcn = createCallbackFcn(app, @editnamecolumn_ButtonPushed, true);
            app.editnamecolumnButton.Position = [19 189 112 22];
            app.editnamecolumnButton.Text = 'edit name column';
        end
    end
    methods (Access = public)
        % Construct app
        function app = app2
            % Create and configure components
            createComponents(app)
            % Register the app with App Designer
            registerApp(app, app.UIFigure)
            % Execute the startup function
            runStartupFcn(app, @startupFcn)
            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

MATLAB: App Designer How to “StartUp” within the App

(1) Two possibilities to reset your app to its default state:

https://www.mathworks.com/matlabcentral/answers/489003-reset-or-clear-property-values-in-app-designer#comment_763148

https://www.mathworks.com/matlabcentral/answers/489003-reset-or-clear-property-values-in-app-designer#answer_399598

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.

Best Answer

Related Solutions

MATLAB: CellSelect​ionCallbac​k-update column name

MATLAB: App Designer How to “StartUp” within the App

Related Question

MATLAB: CellSelectionCallback-update column name