/// <summary>
/// Subsequent changes of the same property on the same object are consolidated into one action
/// </summary>
/// <param name="followingAction">Subsequent action that is being recorded</param>
/// <returns>true if it agreed to merge with the next action,
/// false if the next action should be recorded separately</returns>
public override bool TryToMerge(IAction followingAction)
{
SetPropertyAction next = followingAction as SetPropertyAction;
if (next != null && next.ParentObject == this.ParentObject && next.Property == this.Property)
{
Value = next.Value;
Property.SetValue(ParentObject, Value, null);
return(true);
}
return(false);
}
public void SetPropertyActionWorks()
{
var instance = new Exception();
SetPropertyAction action = new SetPropertyAction(instance, "Source", "foo");
ActionManager am = new ActionManager();
am.RecordAction(action);
Assert.AreEqual("foo", instance.Source);
am.Undo();
Assert.AreEqual(null, instance.Source);
am.Redo();
Assert.AreEqual("foo", instance.Source);
}
public static void SetProperty(this ActionManager actionManager, object instance, string propertyName, object value)
{
SetPropertyAction action = new SetPropertyAction(instance, propertyName, value);
Execute(actionManager, action);
}
/// <summary>
/// API to update the object model from the UI
/// Creates an action and registers it with the action manager
/// This is the interesting part of the demo
/// </summary>
void SetProperty(string propertyName, object propertyValue)
{
if (reentrancyGuard)
{
return;
}
SetPropertyAction action = new SetPropertyAction(joe, propertyName, propertyValue);
actionManager.RecordAction(action);
UpdateUndoRedoButtons();
}