RadioButton.cs :  » PDF » PDF-Clown » it » stefanochizzolini » clown » documents » interaction » forms » C# / CSharp Open Source

/*
  Copyright 2008 Stefano Chizzolini. http://clown.stefanochizzolini.it

  Contributors:
    * Stefano Chizzolini (original code developer, http://www.stefanochizzolini.it)

  This file should be part of the source code distribution of "PDF Clown library"
  (the Program): see the accompanying README files for more info.

  This Program is free software; you can redistribute it and/or modify it under
  the terms of the GNU General Public License as published by the Free Software
  Foundation; either version 2 of the License, or (at your option) any later version.

  This Program is distributed in the hope that it will be useful, but WITHOUT ANY
  WARRANTY, either expressed or implied; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the License for more details.

  You should have received a copy of the GNU General Public License along with this
  Program (see README files); if not, go to the GNU website (http://www.gnu.org/).

  Redistribution and use, with or without modification, are permitted provided that such
  redistributions retain the above copyright notice, license and disclaimer, along with
  this list of conditions.
*/

using it.stefanochizzolini.clown.bytes;
using it.stefanochizzolini.clown.documents;
using it.stefanochizzolini.clown.documents.interaction.annotations;
using it.stefanochizzolini.clown.objects;

using System;

namespace it.stefanochizzolini.clown.documents.interaction.forms{
  /**
    <summary>Radio button field [PDF:1.6:8.6.3].</summary>
  */
  public class RadioButton
    : ButtonField
  {
    #region dynamic
    #region constructors
    /**
      <summary>Creates a new radiobutton within the given document context.</summary>
    */
    public RadioButton(
      string name,
      DualWidget[] widgets,
      string value
      ) : base(
        name,
        widgets[0]
        )
    {
      FlagsEnum flags = Flags; flags |= FlagsEnum.Radio; flags |= FlagsEnum.NoToggleToOff; Flags = flags;

      FieldWidgets fieldWidgets = Widgets;
      for(
        int index = 1,
          length = widgets.Length;
        index < length;
        index++
        )
      {fieldWidgets.Add(widgets[index]);}

      Value = value;
    }

    public RadioButton(
      PdfDirectObject baseObject
      ) : base(baseObject)
    {}
    #endregion

    #region interface
    #region public
    public override object Clone(
      Document context
      )
    {throw new NotImplementedException();}

    /**
      <summary>Gets/Sets whether all the field buttons can be deselected at the same time.</summary>
    */
    public bool Toggleable
    {
      get
      {return !((Flags & FlagsEnum.NoToggleToOff) == FlagsEnum.NoToggleToOff);}
      set
      {
        FlagsEnum flags = Flags;
        if(value)
        {flags ^= FlagsEnum.NoToggleToOff;}
        else
        {flags |= FlagsEnum.NoToggleToOff;}
        Flags = flags;
      }
    }

    public override object Value
    {
      get
      {return base.Value;}
      set
      {
        PdfName selectedWidgetName = new PdfName((string)value);
        bool selected = false;
        // Selecting the current appearance state for each widget...
        foreach(Widget widget in Widgets)
        {
          PdfName currentState;
          if(((DualWidget)widget).WidgetName.Equals(value)) // Selected state.
          {
            selected = true;
            currentState = selectedWidgetName;
          }
          else // Unselected state.
          {currentState = PdfName.Off;}

          widget.BaseDataObject[PdfName.AS] = currentState;
        }
        // Select the current widget!
        BaseDataObject[PdfName.V] = (selected ? selectedWidgetName : null);
      }
    }
    #endregion
    #endregion
    #endregion
  }
}