0. Assume the text’s ng-model to be changed is {{someText}}
1. Create a modal.
2. Let there be an input in the modal. The input’s ng-model should not be {{someText}}, but {{anotherText}}
3. Let there be 2 buttons in the modal. One is "cancel", the other is "ok". For "ok’, ng-click = "submitChange()";
4. Let there a button to turn on the modal. Instead of setting "ui-turn-on", use ng-click="showModal()"
5. In function showModal(), do 2 jobs:
a. $scope. anotherText = someText;
b. and $rootScope.Ui.turnOn("the_modal");
6. In function submitChange(), do 2 jobs:
a. send {{anotherText}}’s value to the server side
b. If success, set {{someText}}’s value to {{anotherText}}’s value