AutoWeight/AutoWeightServer/UI/FrmSign.cs

using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;

namespace EC.AutoWeightServer.UI
{
	public partial class FrmSign : Form
	{
		private GraphicsPath mousePath = new GraphicsPath();

		//画笔透明度
		private int myAlpha = 100;

		//画笔颜色对象
		private Color myUserColor = new Color();

		//画笔宽度
		private int myPenWidth = 5;

		//签名的图片对象
		public Bitmap SavedBitmap;

		public bool isSign = false;

		public FrmSign()
		{
			InitializeComponent();
		}

		private void pictureBox1_MouseMove(object sender, MouseEventArgs e)
		{
			if (e.Button == MouseButtons.Left)
			{
				try
				{
					mousePath.AddLine(e.X, e.Y, e.X, e.Y);
				}
				catch (Exception ex)
				{
					MessageBox.Show(ex.Message);
				}
			}
			pictureBox1.Invalidate();
		}

		private void pictureBox1_MouseDown(object sender, MouseEventArgs e)
		{
			if (e.Button == MouseButtons.Left)
			{
				isSign = true;
				mousePath.StartFigure();
			}
		}

		private void pictureBox1_MouseUp(object sender, MouseEventArgs e)
		{
		}

		private void pictureBox1_Paint(object sender, PaintEventArgs e)
		{
			try
			{
				myUserColor = System.Drawing.Color.Blue;
				myAlpha = 255;
				Pen CurrentPen = new Pen(Color.FromArgb(myAlpha, myUserColor), myPenWidth);
				e.Graphics.DrawPath(CurrentPen, mousePath);
			}
			catch { }
		}

		private void btnClear_Click(object sender, EventArgs e)
		{
			isSign = false;
			pictureBox1.CreateGraphics().Clear(Color.White);
			mousePath.Reset();
		}

		private void btnOk_Click(object sender, EventArgs e)
		{
			SavedBitmap = new Bitmap(pictureBox1.Width, pictureBox1.Height);
			pictureBox1.DrawToBitmap(SavedBitmap, new Rectangle(0, 0, pictureBox1.Width, pictureBox1.Height));
			this.DialogResult = System.Windows.Forms.DialogResult.OK;
		}
	}
}