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// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
// Copyright (c) 2008 Novell, Inc. (http://www.novell.com)
//
// Authors:
// Mario Carrion <mcarrion@novell.com>
//
using System;
using System.Windows.Automation;
using System.Windows.Automation.Provider;
namespace Mono.UIAutomation.Winforms.Events
{
internal abstract class BaseAutomationPropertyEvent : ProviderEvent
{
#region Constructors
protected BaseAutomationPropertyEvent (SimpleControlProvider provider,
AutomationProperty property)
: base (provider)
{
this.property = property;
OldValue = Provider.GetPropertyValue (Property.Id);
}
#endregion
#region Public Properties
public AutomationProperty Property {
get { return property; }
}
public object OldValue {
get { return oldValue; }
private set { oldValue = value; }
}
#endregion
#region Protected Methods
protected virtual object GetNewPropertyValue ()
{
return Provider.GetPropertyValue (Property.Id);
}
protected void RaiseAutomationPropertyChangedEvent ()
{
if (AutomationInteropProvider.ClientsAreListening == true) {
object newValue = GetNewPropertyValue ();
if (object.Equals (OldValue, newValue) == false) {
AutomationPropertyChangedEventArgs args =
new AutomationPropertyChangedEventArgs (Property,
OldValue,
newValue);
AutomationInteropProvider.RaiseAutomationPropertyChangedEvent (Provider,
args);
OldValue = newValue;
}
}
}
#endregion
#region Private fields
private object oldValue;
private AutomationProperty property;
#endregion
}
}
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