187 lines
7.2 KiB
C#
187 lines
7.2 KiB
C#
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//
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// PDFsharp - A library for processing PDF
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//
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// Authors:
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// Klaus Potzesny
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//
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// Copyright (c) 2005-2017 empira Software GmbH, Cologne Area (Germany)
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//
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// http://www.pdfsharp.com
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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using System;
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namespace PdfSharp.Drawing.BarCodes
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{
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/// <summary>
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/// Internal base class for several bar code types.
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/// </summary>
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public abstract class ThickThinBarCode : BarCode // TODO: The name is not optimal
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{
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/// <summary>
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/// Initializes a new instance of the <see cref="ThickThinBarCode"/> class.
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/// </summary>
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public ThickThinBarCode(string code, XSize size, CodeDirection direction)
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: base(code, size, direction)
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{ }
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internal override void InitRendering(BarCodeRenderInfo info)
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{
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base.InitRendering(info);
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CalcThinBarWidth(info);
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info.BarHeight = Size.Height;
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// HACK in ThickThinBarCode
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if (TextLocation != TextLocation.None)
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info.BarHeight *= 4.0 / 5;
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#if DEBUG_
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XColor back = XColors.LightSalmon;
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back.A = 0.3;
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XSolidBrush brush = new XSolidBrush(back);
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info.Gfx.DrawRectangle(brush, new XRect(info.Center - size / 2, size));
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#endif
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switch (Direction)
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{
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case CodeDirection.RightToLeft:
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info.Gfx.RotateAtTransform(180, info.Position);
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break;
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case CodeDirection.TopToBottom:
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info.Gfx.RotateAtTransform(90, info.Position);
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break;
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case CodeDirection.BottomToTop:
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info.Gfx.RotateAtTransform(-90, info.Position);
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break;
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}
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}
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/// <summary>
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/// Gets or sets the ration between thick an thin lines. Must be between 2 and 3.
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/// Optimal and also default value is 2.6.
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/// </summary>
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public override double WideNarrowRatio
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{
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get { return _wideNarrowRatio; }
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set
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{
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if (value > 3 || value < 2)
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throw new ArgumentOutOfRangeException("value", BcgSR.Invalid2of5Relation);
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_wideNarrowRatio = value;
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}
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}
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double _wideNarrowRatio = 2.6;
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/// <summary>
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/// Renders a thick or thin line for the bar code.
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/// </summary>
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/// <param name="info"></param>
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/// <param name="isThick">Determines whether a thick or a thin line is about to be rendered.</param>
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internal void RenderBar(BarCodeRenderInfo info, bool isThick)
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{
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double barWidth = GetBarWidth(info, isThick);
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double height = Size.Height;
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double xPos = info.CurrPos.X;
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double yPos = info.CurrPos.Y;
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switch (TextLocation)
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{
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case TextLocation.AboveEmbedded:
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height -= info.Gfx.MeasureString(Text, info.Font).Height;
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yPos += info.Gfx.MeasureString(Text, info.Font).Height;
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break;
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case TextLocation.BelowEmbedded:
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height -= info.Gfx.MeasureString(Text, info.Font).Height;
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break;
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}
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XRect rect = new XRect(xPos, yPos, barWidth, height);
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info.Gfx.DrawRectangle(info.Brush, rect);
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info.CurrPos.X += barWidth;
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}
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/// <summary>
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/// Renders a thick or thin gap for the bar code.
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/// </summary>
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/// <param name="info"></param>
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/// <param name="isThick">Determines whether a thick or a thin gap is about to be rendered.</param>
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internal void RenderGap(BarCodeRenderInfo info, bool isThick)
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{
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info.CurrPos.X += GetBarWidth(info, isThick);
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}
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/// <summary>
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/// Renders a thick bar before or behind the code.
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/// </summary>
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internal void RenderTurboBit(BarCodeRenderInfo info, bool startBit)
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{
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if (startBit)
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info.CurrPos.X -= 0.5 + GetBarWidth(info, true);
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else
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info.CurrPos.X += 0.5; //GetBarWidth(info, true);
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RenderBar(info, true);
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if (startBit)
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info.CurrPos.X += 0.5; //GetBarWidth(info, true);
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}
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internal void RenderText(BarCodeRenderInfo info)
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{
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if (info.Font == null)
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info.Font = new XFont("Courier New", Size.Height / 6);
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XPoint center = info.Position + CalcDistance(Anchor, AnchorType.TopLeft, Size);
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switch (TextLocation)
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{
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case TextLocation.Above:
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center = new XPoint(center.X, center.Y - info.Gfx.MeasureString(Text, info.Font).Height);
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info.Gfx.DrawString(Text, info.Font, info.Brush, new XRect(center, Size), XStringFormats.TopCenter);
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break;
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case TextLocation.AboveEmbedded:
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info.Gfx.DrawString(Text, info.Font, info.Brush, new XRect(center, Size), XStringFormats.TopCenter);
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break;
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case TextLocation.Below:
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center = new XPoint(center.X, info.Gfx.MeasureString(Text, info.Font).Height + center.Y);
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info.Gfx.DrawString(Text, info.Font, info.Brush, new XRect(center, Size), XStringFormats.BottomCenter);
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break;
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case TextLocation.BelowEmbedded:
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info.Gfx.DrawString(Text, info.Font, info.Brush, new XRect(center, Size), XStringFormats.BottomCenter);
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break;
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}
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}
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/// <summary>
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/// Gets the width of a thick or a thin line (or gap). CalcLineWidth must have been called before.
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/// </summary>
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/// <param name="info"></param>
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/// <param name="isThick">Determines whether a thick line's with shall be returned.</param>
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internal double GetBarWidth(BarCodeRenderInfo info, bool isThick)
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{
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if (isThick)
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return info.ThinBarWidth * _wideNarrowRatio;
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return info.ThinBarWidth;
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}
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internal abstract void CalcThinBarWidth(BarCodeRenderInfo info);
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}
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}
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