source: stable/HeuristicLab.ExtLibs/HeuristicLab.AvalonEdit/5.0.1/AvalonEdit-5.0.1/CodeCompletion/OverloadViewer.cs

// Copyright (c) 2014 AlphaSierraPapa for the SharpDevelop Team
// 
// 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.

using System;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Globalization;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;

namespace ICSharpCode.AvalonEdit.CodeCompletion
{
  /// <summary>
  /// Represents a text between "Up" and "Down" buttons.
  /// </summary>
  public class OverloadViewer : Control
  {
    static OverloadViewer()
    {
      DefaultStyleKeyProperty.OverrideMetadata(typeof(OverloadViewer),
                                               new FrameworkPropertyMetadata(typeof(OverloadViewer)));
    }
    
    /// <summary>
    /// The text property.
    /// </summary>
    public static readonly DependencyProperty TextProperty =
      DependencyProperty.Register("Text", typeof(string), typeof(OverloadViewer));
    
    /// <summary>
    /// Gets/Sets the text between the Up and Down buttons.
    /// </summary>
    public string Text {
      get { return (string)GetValue(TextProperty); }
      set { SetValue(TextProperty, value); }
    }
    
    /// <inheritdoc/>
    public override void OnApplyTemplate()
    {
      base.OnApplyTemplate();
      
      Button upButton = (Button)this.Template.FindName("PART_UP", this);
      upButton.Click += (sender, e) => {
        e.Handled = true;
        ChangeIndex(-1);
      };
      
      Button downButton = (Button)this.Template.FindName("PART_DOWN", this);
      downButton.Click += (sender, e) => {
        e.Handled = true;
        ChangeIndex(+1);
      };
    }
    
    /// <summary>
    /// The ItemProvider property.
    /// </summary>
    public static readonly DependencyProperty ProviderProperty =
      DependencyProperty.Register("Provider", typeof(IOverloadProvider), typeof(OverloadViewer));
    
    /// <summary>
    /// Gets/Sets the item provider.
    /// </summary>
    public IOverloadProvider Provider {
      get { return (IOverloadProvider)GetValue(ProviderProperty); }
      set { SetValue(ProviderProperty, value); }
    }
    
    /// <summary>
    /// Changes the selected index.
    /// </summary>
    /// <param name="relativeIndexChange">The relative index change - usual values are +1 or -1.</param>
    public void ChangeIndex(int relativeIndexChange)
    {
      IOverloadProvider p = this.Provider;
      if (p != null) {
        int newIndex = p.SelectedIndex + relativeIndexChange;
        if (newIndex < 0)
          newIndex = p.Count - 1;
        if (newIndex >= p.Count)
          newIndex = 0;
        p.SelectedIndex = newIndex;
      }
    }
  }
  
  sealed class CollapseIfSingleOverloadConverter : IValueConverter
  {
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
      return ((int)value < 2) ? Visibility.Collapsed : Visibility.Visible;
    }
    
    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
      throw new NotImplementedException();
    }
  }
}