UpdateContext – change controls properties using “something like” variable
This describes how to simply change control properties from outside - using button (or something similar).
Context is something like variable - but working only on a particular screen.
Let´s show it in this app, where buttons are switching color on "traffic lights".
How to start?
Let´s add three circles and three buttons.
Then, for circles, set their "Fill" property to a variable. Which means - type there some text without quotations. By doing this, you create a variable.
Then for buttons set their OnSelect property to modify values of these variables.
For example this button switches the first red button on and switches the other buttons off.