RangeBaseAutomationPeer.cs :  » 2.6.4-mono-.net-core » System.Windows » System » Windows » Automation » Peers » C# / CSharp Open Source

//
// System.Windows.Automation.Peers.RangeBaseAutomationPeer
//
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//
// Copyright (C) 2009 Novell, Inc (http://www.novell.com)
//
// 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
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//

using System;
using System.Windows.Automation.Peers;
using System.Windows.Automation.Provider;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;

namespace System.Windows.Automation.Peers{

  public class RangeBaseAutomationPeer : FrameworkElementAutomationPeer, IRangeValueProvider {

    public RangeBaseAutomationPeer (RangeBase owner)
      : base (owner)
    {
      // UIA Event RangeValuePatternIdentifiers.ValueProperty
      // Raised by RangeBase.OnValuePropertyChanged()
      owner.IsEnabledChanged += (o, e) => {
        RaisePropertyChangedEvent (RangeValuePatternIdentifiers.IsReadOnlyProperty, 
                                   e.OldValue, 
                 e.NewValue);
      };
      owner.UIAPropertyChanged += (o, e) => {
        AutomationProperty property = null;
        switch (e.Change) {
        case RangeBase.Change.Large: 
          property = RangeValuePatternIdentifiers.LargeChangeProperty;
          break;
        case RangeBase.Change.Small: 
          property = RangeValuePatternIdentifiers.SmallChangeProperty;
          break;
        case RangeBase.Change.Maximum: 
          property = RangeValuePatternIdentifiers.MaximumProperty;
          break;
        case RangeBase.Change.Minimum: 
          property = RangeValuePatternIdentifiers.MinimumProperty;
          break;
        }
        RaisePropertyChangedEvent (property,
                                   e.OldValue, 
                 e.NewValue);
      };
    }

    public override object GetPattern (PatternInterface patternInterface)
    {
      if (patternInterface == PatternInterface.RangeValue)
        return this;
      return base.GetPattern (patternInterface);
    }


    bool IRangeValueProvider.IsReadOnly {
      get { return !(Owner as RangeBase).IsEnabled; }
    }

    double IRangeValueProvider.LargeChange {
      get { return (Owner as RangeBase).LargeChange; }
    }

    double IRangeValueProvider.Maximum {
      get { return (Owner as RangeBase).Maximum; }
    }

    double IRangeValueProvider.Minimum {
      get { return (Owner as RangeBase).Minimum; }
    }

    double IRangeValueProvider.SmallChange {
      get { return (Owner as RangeBase).SmallChange; }
    }

    double IRangeValueProvider.Value {
      get { return (Owner as RangeBase).Value; }
    }

    void IRangeValueProvider.SetValue (double value)
    {
      RangeBase rangeBase = (RangeBase) Owner;
      if (!rangeBase.IsEnabled)
        throw new ElementNotEnabledException ();

      rangeBase.Value = value;
    }
  }
}