www.pudn.com > neuroocr_src.zip > PaintBoard.cs
// Neural Network OCR
//
// Copyright © Andrew Kirillov, 2005
// andrew.kirillov@gmail.com
//
using System;
using System.Collections;
using System.ComponentModel;
using System.Drawing;
using System.Drawing.Imaging;
using System.Data;
using System.Windows.Forms;
using AForge.Imaging;
using AForge.Imaging.Filters;
namespace NeuroOCR
{
///
/// Summary description for PaintBoard.
///
public class PaintBoard : System.Windows.Forms.Control
{
private Bitmap image;
private bool showReceptors = false;
private bool scaleImage = false;
private Receptors receptors = null;
private Shrink shrinkFilter = new Shrink(Color.FromArgb(255, 255, 255));
private Resize resizeFilter = new Resize();
private bool tracking = false;
///
/// Required designer variable.
///
private System.ComponentModel.Container components = null;
// ShowReceptors property
[DefaultValue(false)]
public bool ShowReceptors
{
get { return showReceptors; }
set
{
showReceptors = value;
Invalidate();
}
}
// ScaleImage property
[DefaultValue(false)]
public bool ScaleImage
{
get { return scaleImage; }
set { scaleImage = value; }
}
// Receptors collection
[Browsable(false)]
public Receptors Receptors
{
get { return receptors; }
set
{
receptors = value;
Invalidate();
}
}
// Area size property
public Size AreaSize
{
get { return new Size(ClientRectangle.Width - 2, ClientRectangle.Height - 2); }
}
// Constructor
public PaintBoard()
{
// This call is required by the Windows.Forms Form Designer.
InitializeComponent();
SetStyle(ControlStyles.AllPaintingInWmPaint | ControlStyles.DoubleBuffer |
ControlStyles.ResizeRedraw | ControlStyles.UserPaint, true);
resizeFilter.Method = InterpolationMethod.NearestNeighbor;
}
///
/// Clean up any resources being used.
///
protected override void Dispose( bool disposing )
{
if( disposing )
{
if( components != null )
components.Dispose();
}
base.Dispose( disposing );
}
#region Component Designer generated code
///
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
///
private void InitializeComponent()
{
//
// PaintBoard
//
this.MouseUp += new System.Windows.Forms.MouseEventHandler(this.PaintBoard_MouseUp);
this.MouseMove += new System.Windows.Forms.MouseEventHandler(this.PaintBoard_MouseMove);
this.MouseDown += new System.Windows.Forms.MouseEventHandler(this.PaintBoard_MouseDown);
}
#endregion
// Paint the control
protected override void OnPaint(PaintEventArgs pe)
{
Graphics g = pe.Graphics;
Rectangle rc = ClientRectangle;
Pen blackPen = new Pen(Color.Black, 1);
Pen bluePen = new Pen(Color.Blue, 1);
Brush whiteBrush = new SolidBrush(Color.White);
// draw border
g.DrawRectangle(blackPen, 0, 0, rc.Width - 1, rc.Height - 1);
// fill rectangle
g.FillRectangle(whiteBrush, 1, 1, rc.Width - 2, rc.Height - 2);
// draw image
if (image != null)
{
g.DrawImage(image, 1, 1, image.Width, image.Height);
}
// draw receptors
if ((showReceptors) && (receptors != null))
{
foreach (Receptor r in receptors)
{
g.DrawLine(bluePen,
r.X1 + 1, r.Y1 + 1,
r.X2 + 1, r.Y2 + 1);
}
}
blackPen.Dispose();
bluePen.Dispose();
whiteBrush.Dispose();
base.OnPaint(pe);
}
// Clear image
public void ClearImage()
{
int width = this.ClientRectangle.Width - 2;
int height = this.ClientRectangle.Height - 2;
Brush whiteBrush = new SolidBrush(Color.White);
if (image != null)
image.Dispose();
// create new image
image = new Bitmap(width, height, PixelFormat.Format24bppRgb);
// create graphics
Graphics g = Graphics.FromImage(image);
// fill rectangle
g.FillRectangle(whiteBrush, 0, 0, width, height);
g.Dispose();
whiteBrush.Dispose();
Invalidate();
}
// Draw letter
public void DrawLetter(char c, string fontName, float size, bool italic)
{
DrawLetter(c, fontName, size, italic, true);
}
public void DrawLetter(char c, string fontName, float size, bool italic, bool invalidate)
{
int width = this.ClientRectangle.Width - 2;
int height = this.ClientRectangle.Height - 2;
Brush blackBrush = new SolidBrush(Color.Black);
Brush whiteBrush = new SolidBrush(Color.White);
// free previous image
if (image != null)
image.Dispose();
// create new image
image = new Bitmap(width, height, PixelFormat.Format24bppRgb);
// create graphics
Graphics g = Graphics.FromImage(image);
// fill rectangle
g.FillRectangle(whiteBrush, 0, 0, width, height);
// draw letter
string str = new string(c, 1);
Font font = new Font(fontName, size, (italic) ? FontStyle.Italic : FontStyle.Regular);
g.DrawString(str, font, blackBrush, new Rectangle(0, 0, width, height));
g.Dispose();
font.Dispose();
blackBrush.Dispose();
whiteBrush.Dispose();
if (invalidate)
Invalidate();
}
// Get image
public Bitmap GetImage()
{
return GetImage(true);
}
public Bitmap GetImage(bool invalidate)
{
if (image == null)
ClearImage();
// scale image
if (scaleImage)
{
// shrink image
Bitmap tempImage = shrinkFilter.Apply(image);
// image dimenstoin
int width = image.Width;
int height = image.Height;
// shrinked image dimension
int tw = tempImage.Width;
int th = tempImage.Height;
// resize factors
float fx = (float) width / (float) tw;
float fy = (float) height / (float) th;
if (fx > fy)
fx = fy;
// set new size of shrinked image
int nw = (int) Math.Round(fx * tw);
int nh = (int) Math.Round(fy * th);
resizeFilter.NewWidth = nw;
resizeFilter.NewHeight = nh;
// resize image
Bitmap tempImage2 = resizeFilter.Apply(tempImage);
//
Brush whiteBrush = new SolidBrush(Color.White);
// create graphics
Graphics g = Graphics.FromImage(image);
// fill rectangle
g.FillRectangle(whiteBrush, 0, 0, width, height);
int x = 0;
int y = 0;
if (nw > nh)
{
y = (height - nh) / 2;
}
else
{
x = (width - nw) / 2;
}
g.DrawImage(tempImage2, x, y, nw, nh);
g.Dispose();
whiteBrush.Dispose();
// release temp images
tempImage.Dispose();
tempImage2.Dispose();
}
// should we repaint the control
if (invalidate)
Invalidate();
return image;
}
// On mouse down
private void PaintBoard_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
{
if ((!tracking) && (e.Button == MouseButtons.Left))
{
Capture = true;
tracking = true;
// creat a blank image
if (image == null)
ClearImage();
}
}
// On mouse up
private void PaintBoard_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e)
{
if ((tracking) && (e.Button == MouseButtons.Left))
{
Capture = false;
tracking = false;
}
}
// On mouse move
private void PaintBoard_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
{
if (tracking)
{
int x = e.X - 1;
int y = e.Y - 1;
if ((x > 0) && (y > 0) && (x < image.Width) && (y < image.Height))
{
using (Brush brush = new SolidBrush(Color.Black))
{
Graphics g = Graphics.FromImage(image);
// draw a point
g.FillEllipse(brush, x - 5, y - 5, 11, 11);
g.Dispose();
}
Invalidate();
}
}
}
}
}