TextField click changes Switch in flutter - dart

Question

As soon as a TextField gets focused, an object which stores if it's enabled changes so that the TextField gets disabled immediately. This also happens when another TextField above gets focused.
The TextField is placed inside a StatefulWidget and a Category object contains another object called Goal which contains a bool variable if it's enabled or disabled. This variable is also used to enable or disable the TextField.
TextField(
controller: _goalAmountController,
enabled: widget.category.goal.enabled,
decoration: InputDecoration(
labelText: "Goal Amount",
border: OutlineInputBorder(),
),
onChanged: (value) {
try {
widget.category.goal.amount = double.parse(value);
} on Exception {
//TODO display error message
print("Invalid Goal-Amount");
}
},
),
There's also a switch below the TextField to enable or disable the Goal by setting it's enabled variable.
SwitchListTile(
value: widget.category.goal.enabled,
title: Text("Enable Goal"),
onChanged: (value) {
setState(
() {
widget.category.goal.enabled = value;
},
);
},
),
I found out that it seems as if the click on a TextField would replace the Goal object with a new one which has false as the default value for enabled.

Answer 1

Try to use FocusNodes instead :
FocusNode textNode = FocusNode();
TextField(
focusNode: textNode,
controller: _goalAmountController,
enabled: widget.category.goal.enabled,
decoration: InputDecoration(
labelText: "Goal Amount",
border: OutlineInputBorder(),
),
later when you want to disable this textField when the user interact with another widget you can call:
textNode.unfocus() ;