1 | using System;
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2 | using System.Collections.Generic;
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3 | using System.Text;
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4 | using System.Drawing;
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5 | using System.Windows.Forms;
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6 | using System.Drawing.Drawing2D;
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7 |
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8 | namespace Netron.Diagramming.Core
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9 | {
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10 | public class Grid
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11 | {
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12 | // ------------------------------------------------------------------
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13 | /// <summary>
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14 | /// Constructor.
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15 | /// </summary>
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16 | // ------------------------------------------------------------------
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17 | public Grid()
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18 | {
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19 | }
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20 |
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21 | public static void Paint(
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22 | Graphics g,
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23 | RectangleF area,
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24 | float horizontalSpacing,
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25 | float verticalSpacing,
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26 | float penWidth)
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27 | {
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28 | //ControlPaint.DrawGrid(
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29 | // g,
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30 | // area,
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31 | // new Size(20, 20),
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32 | // Color.Wheat);
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33 |
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34 | //g.SmoothingMode = SmoothingMode.HighQuality;
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35 | //g.CompositingQuality = CompositingQuality.HighQuality;
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36 | //g.InterpolationMode = InterpolationMode.HighQualityBicubic;
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37 | g.SetClip(area);
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38 | float sideLength = Math.Min(area.Width, area.Height);
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39 | float horizSpacing = sideLength / horizontalSpacing;
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40 | float vertSpacing = sideLength / verticalSpacing;
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41 |
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42 | Pen majorPen = new Pen(Color.DarkGray);
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43 | majorPen.Width = penWidth;
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44 | majorPen.DashStyle = DashStyle.Dot;
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45 |
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46 | float top = area.Top; // The top y coord.
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47 | float bottom = area.Bottom; // The bottom y coord.
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48 | float left = area.Left; // The left y coord.
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49 | float right = area.Right; // The right y coord.
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50 | PointF p1; // The starting point for the grid line.
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51 | PointF p2; // The end point for the grid line.
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52 |
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53 | // Draw the horizontal lines, starting at the top.
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54 | for (float i = top; i <= bottom; i += horizontalSpacing)
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55 | {
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56 | p1 = new PointF(left, i);
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57 | p2 = new PointF(right, i);
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58 | g.DrawLine(majorPen, p1, p2);
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59 | }
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60 |
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61 | // Draw the major vertical lines, starting at the left edge.
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62 | for (float i = left; i <= right; i += verticalSpacing)
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63 | {
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64 | p1 = new PointF(i, top);
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65 | p2 = new PointF(i, bottom);
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66 | g.DrawLine(majorPen, p1, p2);
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67 | }
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68 | g.ResetClip();
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69 | }
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70 | }
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71 | }
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