How to bind a LabelMorph/TextMorph to a variable so that the Morph reflects changes of the variable?

Question

• I have an object with a variable containing a String.
• I have a window containing a LabelMorph/TextMorph (or some other Morph that displays Text?).

How do i bind the LabelMorph/TextMorph to the variable, so that the label updates when the String in the variable changes?

• classic Smalltalk-80 dependent/change/update mechanism?
• Pharo Announcement framework?
• something different??

How would i do this? Which Morph should i use?

Answer 1

Depends on what you want to achieve. You might want to take a look at a way to do it with Glamour in a current Moose image. In a workspace, do-it:

GLMBasicExamples new magritte openOn: GLMMagrittePersonExample sampleData 

That shows how to work with announcements on save. The earlier examples are a better way to start understanding how to work with Glamour (and because of the way the examplebrowser is build, the Magritte example doesn't update the list when it is nested):

GLMBasicExamples open

That has several other examples that update on change.