lineformatrenderer.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 PdfSharp.Drawing;
using PdfSharp.Charting;

namespace PdfSharp.Charting.Renderers
{
  /// <summary>
  /// Represents a renderer specialized to draw lines in various styles, colors and widths.
  /// </summary>
  class LineFormatRenderer
  {
    /// <summary>
    /// Initializes a new instance of the LineFormatRenderer class with the specified graphics, line format
    /// and default width.
    /// </summary>
    public LineFormatRenderer(XGraphics gfx, LineFormat lineFormat, double defaultWidth)
    {
      this.gfx = gfx;
      bool visible = false;
      double width = 0;

      if (lineFormat != null)
      {
        width = lineFormat.width;
        if (width == 0 && !lineFormat.Color.IsEmpty)
          width = defaultWidth;
        visible = lineFormat.Visible || width > 0 || !lineFormat.Color.IsEmpty;
      }

      if (visible)
      {
        this.pen = new XPen(lineFormat.Color, width);
        this.pen.DashStyle = lineFormat.DashStyle;
      }
    }

    /// <summary>
    /// Initializes a new instance of the LineFormatRenderer class with the specified graphics and
    /// line format.
    /// </summary>
    public LineFormatRenderer(XGraphics gfx, LineFormat lineFormat) :
      this(gfx, lineFormat, 0)
    {
    }

    /// <summary>
    /// Initializes a new instance of the LineFormatRenderer class with the specified graphics and pen.
    /// </summary>
    public LineFormatRenderer(XGraphics gfx, XPen pen)
    {
      this.gfx = gfx;
      this.pen = pen;
    }

    /// <summary>
    /// Draws a line from point pt0 to point pt1.
    /// </summary>
    public void DrawLine(XPoint pt0, XPoint pt1)
    {
      if (this.pen != null)
        this.gfx.DrawLine(this.pen, pt0, pt1);
    }

    /// <summary>
    /// Draws a line specified by rect.
    /// </summary>
    public void DrawRectangle(XRect rect)
    {
      if (this.pen != null)
        this.gfx.DrawRectangle(this.pen, rect);
    }

    /// <summary>
    /// Draws a line specified by path.
    /// </summary>
    public void DrawPath(XGraphicsPath path)
    {
      if (this.pen != null)
        this.gfx.DrawPath(this.pen, path);
    }

    /// <summary>
    /// Surface to draw the line.
    /// </summary>
    XGraphics gfx;

    /// <summary>
    /// Pen used to draw the line.
    /// </summary>
    XPen pen;
  }
}