chartrenderer.cs

用C#實現能產生PDF格式文件的源碼

#region PDFsharp Charting - A .NET charting library based on PDFsharp
//
// Authors:
//   Niklas Schneider (mailto:[e-mail])
//
// Copyright (c) 2005-2007 empira Software GmbH, Cologne (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

using System;
using System.Collections;
using System.Diagnostics;
using PdfSharp.Drawing;

namespace PdfSharp.Charting.Renderers
{
  /// <summary>
  /// Represents the base class for all chart renderers.
  /// </summary>
  internal abstract class ChartRenderer : Renderer
  {
    /// <summary>
    /// Initializes a new instance of the ChartRenderer class with the specified renderer parameters.
    /// </summary>
    internal ChartRenderer(RendererParameters parms) : base(parms)
    {
    }

    /// <summary>
    /// Calculates the space used by the legend and returns the remaining space available for the
    /// other parts of the chart.
    /// </summary>
    protected XRect LayoutLegend()
    {
      ChartRendererInfo cri = (ChartRendererInfo)this.rendererParms.RendererInfo;
      XRect remainingRect = this.rendererParms.Box;
      if (cri.legendRendererInfo != null)
      {
        switch (cri.legendRendererInfo.legend.Docking)
        {
          case DockingType.Left:
            cri.legendRendererInfo.X = remainingRect.Left;
            cri.legendRendererInfo.Y = remainingRect.Height / 2 - cri.legendRendererInfo.Height / 2;
            double width = cri.legendRendererInfo.Width + ChartRenderer.LegendSpacing;
            remainingRect.X += width;
            remainingRect.Width -= width;
            break;

          case DockingType.Right:
            cri.legendRendererInfo.X = remainingRect.Right - cri.legendRendererInfo.Width;
            cri.legendRendererInfo.Y = remainingRect.Height / 2 - cri.legendRendererInfo.Height / 2;
            remainingRect.Width -= cri.legendRendererInfo.Width + ChartRenderer.LegendSpacing;
            break;
          
          case DockingType.Top:
            cri.legendRendererInfo.X = remainingRect.Width / 2 - cri.legendRendererInfo.Width / 2;
            cri.legendRendererInfo.Y = remainingRect.Top;
            double height = cri.legendRendererInfo.Height + ChartRenderer.LegendSpacing;
            remainingRect.Y += height;
            remainingRect.Height -= height;
            break;
          
          case DockingType.Bottom:
            cri.legendRendererInfo.X = remainingRect.Width / 2 - cri.legendRendererInfo.Width / 2;
            cri.legendRendererInfo.Y = remainingRect.Bottom - cri.legendRendererInfo.Height;
            remainingRect.Height -= cri.legendRendererInfo.Height + ChartRenderer.LegendSpacing;
            break;
        }
      }
      return remainingRect;
    }

    /// <summary>
    /// Used to separate the legend from the plot area.
    /// </summary>
    private const double LegendSpacing = 0;

    /// <summary>
    /// Represents the default width for all series lines, like borders in column/bar charts.
    /// </summary>
    protected static readonly double DefaultSeriesLineWidth = 0.15;
  }
}