#region PDFsharp Charting - A .NET charting library based on PDFsharp
//
// Authors:
//   Niklas Schneider
//
// Copyright (c) 2005-2017 empira Software GmbH, Cologne Area (Germany)
//
// http://www.pdfsharp.com
// http://sourceforge.net/projects/pdfsharp
//
// 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.
#endregion

namespace PdfSharp.Charting.Renderers
{
    /// <summary>
    /// Base class of all renderers.
    /// </summary>
    internal abstract class Renderer
    {
        /// <summary>
        /// Initializes a new instance of the Renderer class with the specified renderer parameters.
        /// </summary>
        internal Renderer(RendererParameters rendererParms)
        {
            _rendererParms = rendererParms;
        }

        /// <summary>
        /// Derived renderer should return an initialized and renderer specific rendererInfo,
        /// e. g. XAxisRenderer returns an new instance of AxisRendererInfo class.
        /// </summary>
        internal virtual RendererInfo Init()
        {
            return null;
        }

        /// <summary>
        /// Layouts and calculates the space used by the renderer's drawing item.
        /// </summary>
        internal virtual void Format()
        {
            // nothing to do
        }

        /// <summary>
        /// Draws the item.
        /// </summary>
        internal abstract void Draw();

        /// <summary>
        /// Holds all necessary rendering information.
        /// </summary>
        protected RendererParameters _rendererParms;
    }
}