App Designer how to set value for edit field (numeric)

Hello,

I'm having issues with the simplest of things. I have an app that opens a "Parameters" window. In this window I should be able to set system parameters, such as:

Carrier Frequency, Carrier Power etc.

I'm trying to edit the initial value from 0, to some default value defined in my main app. I'm not even at a stage of changing this value, just trying to grab the default instead of 0.

From the code view in the app in the "create components function", if I set an initial value manually it adds a line of app.CarrierPowerEditField.Value = 15;

I try to add this line manually at the startup function, but this affects exactly nothing for the actuall app. I still get an edit box with "0".

Only if I add a "set" button, upon press of which it will set app.CarrierPowerEditField.Value = 15 will the value change.

I can add a button for grabbing the default values, but I run into a different issue:

In the main app I create a variable as public property

DefCarPower = 15;

But if I write

app.CarrierPowerEditField.Value = app.DefCarPower;

it says "Unrecognized method, property, or field 'DefCarPower' for class 'SecondWindow'."

What am I doing wrong?

[Kevin Holly]

Is this "Parameters" window a dialog box created with inputdlg?

Is the "Parameters" window an app? If so, which startup function are you editing, this app or the main app?

Do you have code that you can share?

Answer 1

[Kevin Holly]

If the SecondWindow is an app that was called from the mainapp. You will need to call the property value from the mainapp. The current command calls from the SecondWindow app and it does not find it.

It should be something like this:

app.CarrierPowerEditField.Value = app.Callingapp.DefCarPower;

[Egor Liokumovitch]

Thank you so much!

Now this mistery is solved for me. Thank you!

The only minor issue is that if the value of CarrierPower is left at 0, the app.CarrierPowerEditField.Value field is not created and this doesn't work.

If I set it to any value, say 5 - this field is created and then by pressing a button it grabs and edits the value.

But the main thing is that if I put this line in the startup function it immediately grabs the value.

Thank you again!

[Kevin Holly]

When you define the property value DefCarPower in the mainapp, do you initially give it a value?

properties (Access = public)
    DefCarPower = 0;
end    

or do you have it as:

properties (Access = public)
    DefCarPower
end 

[Egor Liokumovitch]

Yes, I have an initial value.

So If I put

app.CarrierPowerEditField.Value = app.Callingapp.DefCarPower;

into a button press callback, it won't grab the value unless I set app.CarrierPowerEditField.Value initialy to something non-zero.

But that is not a huge issue because the plan was to grab all the default values and show them in the second window. Once all of them are shown, the user can decide if he wants to change any of them.

[Kevin Holly]

I am not sure how your app is setup.

My guess so far is that you have a mainapp with a property variable, DefCarPower. The mainapp calls a SecondWindow app, where you want to change editfield's value based on the property variable , DefCarPower, in the mainapp.

Can you confirm if this is the case?

From the information I have, I'm not sure why app.CarrierPowerEditField.Value cannot be zero.

I have another question. Is the property variable, DefCarPower, defined in the UI of the mainapp?

[Egor Liokumovitch]

The Main window was setup like this:

   properties (Access = private)
        ParameterBox % Dialog box app
        PlotBox
    end

    
    properties (Access = public)
           DefCarrierFreq = 700e6;
           DefCarrierPower = 15;
           DefDataCaptureSize = 10e6;
           DefSR = 2.5e6;
           DefInpAtt = 0;
           DefIFGain = 0;
           DefIDC = 0;
           DefQDC = 0;
           DefGainMis = 0;
           DefPhaseMis = 0;
           DefLOMatch = 0;
           FBGInter
           F1, F2, F3, F4, F5, F6, F7, F8, F9, F10, F11
           end
           

In the other windows I was setting the callback for the button:

            % Button pushed function: SetButton
        function SetButtonPushed(app, event)
            app.CarrierPowerEditField.Value = app.CallingApp.DefCarrierPower;
        end
        

For some reason it was saying that CarrierPowerEditField.Value is an unknown, and it was missing from the creation components:

            app.CarrierPowerEditFieldLabel = uilabel(app.UIFigure);
            app.CarrierPowerEditFieldLabel.HorizontalAlignment = 'right';
            app.CarrierPowerEditFieldLabel.FontName = 'Lucida Sans Unicode';
            app.CarrierPowerEditFieldLabel.Position = [23 459 83 22];
            app.CarrierPowerEditFieldLabel.Text = 'Carrier Power';

but the second I manualy set the value of this property to something non zero it was created and became

            app.CarrierPowerEditFieldLabel = uilabel(app.UIFigure);
            app.CarrierPowerEditFieldLabel.HorizontalAlignment = 'right';
            app.CarrierPowerEditFieldLabel.FontName = 'Lucida Sans Unicode';
            app.CarrierPowerEditFieldLabel.Position = [23 459 83 22];
            app.CarrierPowerEditFieldLabel.Text = 'Carrier Power';
            app.CarrierPowerEditField.Value = 5;  %%<---

And then by pressing a button it was running correctly. Maybe there was some other issue in the code.

I just put all the default values in the beggining and it grabs the values perfectly:

            function startupFcn(app, caller, sz, c)
            % Store main app object
            app.CallingApp = caller;
            % Process sz and c inputs
            app.CarrierPowerEditField.Value = app.CallingApp.DefCarrierPower;
            app.CarrierFrequencyEditField.Value = app.CallingApp.DefCarrierFreq;
            ...

[Kevin Holly]

Note, one says CarrierPowerEditFieldLabel and the other CarrierPowerEditField

[Kevin Holly]

Please see the two apps attached.