poison.core.eventargs.changeeventargs source code

1 /**
2 * Module for change event args handling.
3 *
4 * Authors:
5 *   Jacob Jensen
6 * License:
7 *   https://github.com/PoisonEngine/poison-ui/blob/master/LICENSE
8 */
9 module poison.core.eventargs.changeeventargs;
10 
11 import poison.core.eventargs : EventArgs;
12 
13 /// Event args for value changes.
14 class ChangeEventArgs(T) : EventArgs {
15   private:
16   /// The old value.
17   T _oldValue;
18 
19   /// The new value.
20   T _newValue;
21 
22   public:
23   /**
24   * Creates a new change event args.
25   * Params:
26   *   oldValue =  The old value.
27   *   newValue =  The new value.
28   */
29   this(T oldValue, T newValue) {
30     super();
31 
32     _oldValue = oldValue;
33     _newValue = newValue;
34   }
35 
36   @property {
37     /// Gets the old value.
38     T oldValue() { return _oldValue; }
39 
40     /// Gets the new value.
41     T newValue() { return _newValue; }
42   }
43 }