openhardwaremonitor/GUI/UserRadioGroup.cs

/*
 
  This Source Code Form is subject to the terms of the Mozilla Public
  License, v. 2.0. If a copy of the MPL was not distributed with this
  file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
  Copyright (C) 2011 Michael Möller <mmoeller@openhardwaremonitor.org>
	
*/

using System;
using System.Collections.Generic;
using System.Windows.Forms;
using OpenHardwareMonitor.Utilities;

namespace OpenHardwareMonitor.GUI {
  public class UserRadioGroup {
    private string name;
    private int value;
    private MenuItem[] menuItems;
    private event EventHandler changed;
    private PersistentSettings settings;

    public UserRadioGroup(string name, int value,
      MenuItem[] menuItems, PersistentSettings settings) {
      this.settings = settings;
      this.name = name;
      if (name != null)
        this.value = settings.GetValue(name, value);
      else
        this.value = value;
      this.menuItems = menuItems;
      this.value = Math.Max(Math.Min(this.value, menuItems.Length - 1), 0);

      for (int i = 0; i < this.menuItems.Length; i++) {
        this.menuItems[i].Checked = i == this.value;
        int index = i;
        this.menuItems[i].Click += delegate(object sender, EventArgs e) {
          this.Value = index;
        };
      }      
    }

    public int Value {
      get { return value; }
      set {
        if (this.value != value) {
          this.value = value;
          if (this.name != null)
            settings.SetValue(name, value);
          for (int i = 0; i < this.menuItems.Length; i++) 
            this.menuItems[i].Checked = i == value;
          if (changed != null)
            changed(this, null);
        }
      }
    }

    public event EventHandler Changed {
      add {
        changed += value;
        if (changed != null)
          changed(this, null);
      }
      remove {
        changed -= value;
      }
    }
  }
}