132 lines
4.8 KiB
C#
132 lines
4.8 KiB
C#
using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Drawing;
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using System.Data;
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using System.Linq;
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using System.Text;
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using System.Windows.Forms;
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using System.Drawing.Drawing2D;
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using System.Diagnostics;
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namespace WindowsFormsApp
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{
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public partial class PenDraw : UserControl
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{
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//GDI+
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Graphics DrawGraphic = null;
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//笔画坐标点
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private List<Point> Stroke=new List<Point>();
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//定义画布高792
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private const int IMG_HEIGHT = 792;
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//定义画布宽560
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private const int IMG_WIDHT = 560;
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//本示例适用于A4点阵纸书写，相关尺寸根据A4点阵纸进行了缩放
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//不同尺寸点阵纸点阵宽高尺寸计算方法为：纸张物理尺寸（毫米）/0.3 *8,详见 开发必读.pdf 文档
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//A4点阵纸点阵高度
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private const int A4_DOT_HEIGHT = 7920;
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//A4点阵纸点阵宽度
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private const int A4_DOT_WIDTH = 5600;
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//序列号
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private string PenSerial = string.Empty;
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public PenDraw(string penSerial)
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{
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PenSerial = penSerial;
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InitializeComponent();
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InitDraw();
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this.Width = 280;
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this.Height = 396;
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}
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private void InitDraw()
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{
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Bitmap bitmap = new Bitmap(IMG_WIDHT, IMG_HEIGHT);
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DrawGraphic = Graphics.FromImage(bitmap);
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double scale = IMG_HEIGHT * 1.0 / A4_DOT_HEIGHT;
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DrawGraphic.FillRectangle(Brushes.AliceBlue, 0, 0, IMG_WIDHT, IMG_HEIGHT);
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DrawGraphic.DrawString(PenSerial, new Font("宋体", 45), Brushes.Black, 0, 0);
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pictureBox.Image = bitmap;
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DrawGraphic.ScaleTransform((float)scale, (float)scale);
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DrawGraphic.SmoothingMode = SmoothingMode.AntiAlias;
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}
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public void OnPenDown(ulong time, string penSerial, int penType)
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{
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}
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//抬笔后将坐标一次性画出
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public void OnPenUp(ulong time, string penSerial, int penType)
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{
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if (this.InvokeRequired)
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{
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Action<ulong, string, int> action = new Action<ulong, string, int>(OnPenUp);
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this.Invoke(action, new object[] { time, penSerial, penType });
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}
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else
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{
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int leftPoints = Stroke.Count % 3;
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if (0 != leftPoints)
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{
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int from = Stroke.Count - leftPoints - 1;
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if (from < 0)
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from = 0;
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int to = Stroke.Count - 1;
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DrawCoordinates(from, to);
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}
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Stroke.Clear();
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}
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}
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private void DrawCoordinates(int from, int to)
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{
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if (pictureBox.InvokeRequired)
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{
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Action<int, int> action = new Action<int, int>(DrawCoordinates);
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this.Invoke(action, new object[] { from, to });
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}
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else
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{
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Point[] points = new Point[to - from + 1];
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int l = Stroke[from].X, r = Stroke[from].X, t = Stroke[from].Y, b = Stroke[to].Y;
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for (int i = from; i <= to; i++)
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{
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points[i - from] = Stroke[i];
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l = Math.Min(l, Stroke[i].X);
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r = Math.Max(r, Stroke[i].X);
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t = Math.Min(t, Stroke[i].Y);
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b = Math.Max(b, Stroke[i].Y);
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}
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Pen pen = new Pen(new SolidBrush(Color.Blue), 3);
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if (points.Length == 1)
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DrawGraphic.DrawLine(pen, points[0], points[0]);
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else if (points.Length == 2)
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DrawGraphic.DrawLine(pen, points[0], points[1]);
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else
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DrawGraphic.DrawCurve(pen, points);
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pen.Dispose();
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l = (int)(1.0 * l / A4_DOT_WIDTH * pictureBox.Width) - 5;
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r = (int)(1.0 * r / A4_DOT_WIDTH * pictureBox.Width) + 5;
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t = (int)(1.0 * t / A4_DOT_HEIGHT * pictureBox.Height) - 5;
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b = (int)(1.0 * b / A4_DOT_HEIGHT * pictureBox.Height) + 5;
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Rectangle rec = new Rectangle(l, t, r - l, b - t);
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pictureBox.Invalidate(rec);
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}
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}
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public void OnPenCoordinate(ulong time, string penSerial, int penType, string pageSerial, int cx, int cy, ushort force)
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{
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Stroke.Add(new Point(cx, cy));
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if (Stroke.Count % 3 == 0)
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{
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int from = Stroke.Count - 3 - 1;
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if (from < 0)
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from = 0;
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int to = Stroke.Count - 1;
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DrawCoordinates(from, to);
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}
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}
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}
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}
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