using System;
using System.ComponentModel;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Runtime.InteropServices;
using System.Text;
using System.Web.UI;
using System.Web.UI.WebControls;
[assembly:TagPrefix("SignNameCustomControl", "relay")]
namespace SignNameCustomControl
{
/// <summary>
/// Summary description for SignNameControl.
/// </summary>
[DefaultProperty("Text"),
ToolboxData("<{0}:SignNameControl runat=server></{0}:SignNameControl>")]
public class SignNameControl : System.Web.UI.WebControls.WebControl
{
#region Const fields
private const int MM_ANISOTROPIC = 8;
#endregion
#region Enumerations
public enum PenSizeEnum
{
/// <summary>
/// ??????
/// </summary>
Fine = 1,
/// <summary>
/// ????
/// </summary>
Bold = 2
}
/// <summary>
/// ????(?????)
/// </summary>
public enum DisplayModeEnum
{
Edit = 1,
View = 2
}
/// <summary>
/// ????????
/// </summary>
private enum EmfToWmfBitsFlags
{
/// <summary>
///Use the default conversion
/// </summary>
EmfToWmfBitsFlagsDefault = 0x00000000,
/// <summary>
/// Embedded the source of the EMF metafiel within the resulting WMF metafile
/// </summary>
EmfToWmfBitsFlagsEmbedEmf = 0x00000001,
/// <summary>
/// Place a 22-byte header in the resulting WMF file. The header is required for the metafile to be considered placeable.
/// </summary>
EmfToWmfBitsFlagsIncludePlaceable = 0x00000002,
/// <summary>
/// Don't simulate clipping by using the XOR operator.
/// </summary>
EmfToWmfBitsFlagsNoXORClip = 0x00000004
}
#endregion
#region Private Variables
private string _signatureHex = string.Empty;
private string _signatureCoordinate = string.Empty;
private int _signatureWidth = 400;
private int _signatureHeight = 120;
private PenSizeEnum _penSize = PenSizeEnum.Fine;
private DisplayModeEnum _mode = DisplayModeEnum.View;
#endregion
#region Public properties
/// <summary>
/// ????????????,?????: "x1~y1:x2~y2"
/// </summary>
public string SignatureCoordinate
{
get{return txtCoords.Text.ToString();}
set{txtCoords.Text = value;}
}
/// <summary>
/// ????
/// </summary>
public int SignatureWidth
{
get{return _signatureWidth;}
set{_signatureWidth = value;}
}
/// <summary>
/// ????
/// </summary>
public int SignatureHeight
{
get{return _signatureHeight;}
set{_signatureHeight = value;}
}
/// <summary>
/// ???????
/// </summary>
public PenSizeEnum PenSize
{
get{return _penSize;}
set{_penSize = value;}
}
/// <summary>
/// ?????16????
/// </summary>
public string signatureHex
{
get{return convertCoordinatesToHex();}
set{_signatureHex = value;}
}
/// <summary>
/// ????????
/// </summary>
public DisplayModeEnum DisplayMode
{
get{return _mode;}
set{_mode = value;}
}
#endregion
#region Member Variables
private TextBox txtCoords;
#endregion
#region Private Methods
[DllImportAttribute("gdiplus.dll")]
private static extern uint GdipEmfToWmfBits( IntPtr _hEmf, uint _bufferSize, byte[] _buffer, int _mappingMode, EmfToWmfBitsFlags _flags );
private string convertCoordinatesToHex()
{
string signatureHex = string.Empty;
if( SignatureCoordinate.Length > 0 )
{
StringBuilder signatureHexVaule = new StringBuilder();
MemoryStream memoryStream = new MemoryStream();
System.Drawing.Image signatureTemplateImg = new System.Drawing.Bitmap( SignatureWidth, SignatureHeight, System.Drawing.Imaging.PixelFormat.Format24bppRgb );
Graphics SignatureGraphs = Graphics.FromImage( signatureTemplateImg );
SignatureGraphs.FillRectangle( Brushes.White, 0, 0, signatureTemplateImg.Width, signatureTemplateImg.Height );
Metafile signatureMetaFile = null;
IntPtr hdc;
try
{
using( SignatureGraphs = Graphics.FromImage( signatureTemplateImg ) )
{
hdc = SignatureGraphs.GetHdc();
signatureMetaFile = new Metafile( memoryStream, hdc );
SignatureGraphs.ReleaseHdc( hdc );
}
using( SignatureGraphs = Graphics.FromImage( signatureMetaFile ) )
{
SignatureGraphs.DrawImage( signatureTemplateImg, new System.Drawing.Rectangle( 0, 0, signatureTemplateImg.Width, signatureTemplateImg.Height ) );
SignatureGraphs.DrawRectangle(new Pen(Color.White, 1), 0, 0, SignatureWidth, SignatureHeight);
Pen pen = new Pen( Color.Black, 1 );
string []points = SignatureCoordinate.Split( ':' );
string []point = null;
for( int i = 0; i < points.Length - 1 ; i++ )
{
point = points[i].Split( '~' );
if( point.Length == 4 )
{
SignatureGraphs.DrawRectangle( pen, float.Parse( point[0] ), float.Parse( point[1] ), float.Parse( point[2] ), float.Parse( point[3] ) );
}
}
}
IntPtr hEmf = signatureMetaFile.GetHenhmetafile();
uint bufferSize = GdipEmfToWmfBits( hEmf, 0, null, MM_ANISOTROPIC, EmfToWmfBitsFlags.EmfToWmfBitsFlagsDefault );
byte[] buffer = new byte[bufferSize];
GdipEmfToWmfBits( hEmf, bufferSize, buffer, MM_ANISOTROPIC, EmfToWmfBitsFlags.EmfToWmfBitsFlagsDefault );
for( int i = 0; i < buffer.Length; ++i )
{
signatureHexVaule.Append( String.Format( "{0:X2}", buffer[i] ) );
}
signatureHex = signatureHexVaule.ToString();
}
finally
{
if( SignatureGraphs != null )
{
SignatureGraphs.Dispose();
}
if( signatureMetaFile != null )
{
signatureMetaFile.Dispose();
}
if( memoryStream != null )
{
memoryStream.Close();
}
}
}
return signatureHex;
}
#endregion
#region Protected Members
/// <summary>
/// ??????TextBox???????
/// </summary>
/// <param name="e">EventArgs</param>
protected override void OnInit( EventArgs e )
{
txtCoords = new TextBox();
txtCoords.ID = "txtCoords";
txtCoords.Style.Add( "display", "none" );
Controls.Add( txtCoords );
base.OnInit( e );
}
protected override void Render(HtmlTextWriter writer)
{
if( this._mode == DisplayModeEnum.Edit )
{
writer.WriteLine( "<style type=\"text/css\">" );
writer.WriteLine( ".point {position: absolute; background-color: black; color: black; width: 1px; height: 1px;font-size: "+ Convert.ToInt16( _penSize ) * 2 + "px}" );
writer.WriteLine( "</style>" );
writer.WriteLine( "<table border=\"1\" cellpadding=\"0\" cellspacing=\"10\" ID=\"Panel\">" );
writer.WriteLine( "<tr>" );
writer.WriteLine( "<td height=\"40\" width=\"120\">" );
writer.WriteLine( "<div id=\"Canvas\" style=\"background-color: white; width: " + _signatureWidth +"px; height: " + _signatureHeight + "px\"></div>" );
writer.WriteLine( "</td>" );
writer.WriteLine( "</tr>" );
writer.WriteLine( "</table>\n" );
string applicationDirectory = this.Page.Request.PhysicalApplicationPath;
writer.WriteLine( "<script language='JavaScript' src='" + applicationDirectory + "JS/SignatureCapture.js'></script>" );
writer.WriteLine( "<script language='JavaScript'>" );
writer.WriteLine( "window.onload = initialize" );
writer.WriteLine( "function initialize(){" );
writer.WriteLine( " load('" + txtCoords.ClientID + "');}");
writer.WriteLine( "</script>" );
}
else
{
writer.WriteLine( "<img src ='DisplayImage.aspx'" + " width=" + _signatureWidth + " height=" + _signatureHeight + " />" );
}
base.Render ( writer );
}
#endregion
}
}
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