How to only show image when button is pushed?

Hello all, I am trying to display several images in AppDesigner, depending on what button is pushed (both buttons should be able to be pushed at the same time).

I have two state button 'app.Button' and 'app.Button2'. I also have an Image 'app.Image'.

When 'Button' is pushed, I want 'pepper.png' to appear, and when 'Button2' is pushed, I want 'cucumber.png' to appear. For those purposes, I have created the following callbacks:

function ButtonValueChanged(app, event)
     value = app.Button.Value;
     app.Image.ImageSource = 'pepper.png';
end

function Button2ValueChanged(app, event)
     value = app.Button2.Value;
     app.Image.ImageSource = 'cucumber.png';
end

So far, this code works.

Now, I want the image 'pepper&cucumber.png' to appear if both Buttons are pushed.

Additionnally, if I deselect 'Button', I want 'pepper.png' to disappear (which is currently not the case, it just stays).

Thanks in advance for all your advice!

[Rik]

You have two functions that are dependent on eachother. You explain in words that button 1 must do this:

• if it was not pressed and button 2 was not, show pepper.png
• if it was pressed and button 2 was not, hide the image
• if it was not pressed and button 2 was , show pepper&cucumber.png
• if it was pressed and button 2 was , show cucumber.png

Do you see this behavior in your code?

[DGM]

Your callbacks are executed every time the button state changes

Each CBF records the state of the button, but never uses it (in this scope)

instead, it draws the selected picture regardless of button state.

Consider that what gets drawn needs to be a function of both button states. How you handle that is up to you.

EDIT:

I don't use AppDesigner, but for something simple like this, I'd normally just make one CBF that's used by both buttons. Check the states of both buttons and then use some conditional control structure to do whatever needs to be done to display each particular image or to clear the axes.

[elevonm]

Thank you both for the help!

Answer 1

[elevonm]

Ok this helped a lot, thank you! I defined a function in the methods that contains all the above if statements, and then I called this function in my callbacks.

Thank you so much!!