添加项目文件。
This commit is contained in:
zhusenlin
417
CowainHmi/ucArrowLine.cs
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417
CowainHmi/ucArrowLine.cs
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using PCHMI;
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using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Data;
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using System.Drawing;
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using System.Drawing.Drawing2D;
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using System.Linq;
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using System.Net;
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using System.Text;
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using System.Threading.Tasks;
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using System.Windows.Forms;
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namespace CowainHmi
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{
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public enum LineDirection
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{
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左上右下,
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左下右上,
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水平,
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垂直
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}
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public enum ArrowType
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{
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无箭头,
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结束箭头,
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开始箭头,
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双箭头
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}
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public partial class ucArrowLine : Control
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{
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// 私有字段
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private int _lineWidth = 2;
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private int _arrowWidth = 10;
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private int _arrowHeight = 5;
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private LineDirection _angle = LineDirection.水平;
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private ArrowType _arrowType = ArrowType.无箭头;
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private Color _lineColor = Color.Teal;
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private PointF _startPoint = new PointF(50, 50);
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private PointF _endPoint = new PointF(200, 50);
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// 公共属性
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[Browsable(true), EditorBrowsable(EditorBrowsableState.Always), DesignerSerializationVisibility(DesignerSerializationVisibility.Visible)]
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public int LineWidth
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{
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get { return _lineWidth; }
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set
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{
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_lineWidth = value;
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Draw(); // 触发重绘
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}
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}
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// 公共属性
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[Browsable(true), EditorBrowsable(EditorBrowsableState.Always), DesignerSerializationVisibility(DesignerSerializationVisibility.Visible)]
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public Color LineColor
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{
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get { return _lineColor; }
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set
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{
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_lineColor = value;
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Draw(); // 触发重绘
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}
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}
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[Browsable(true), EditorBrowsable(EditorBrowsableState.Always), DesignerSerializationVisibility(DesignerSerializationVisibility.Visible)]
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public int ArrowWidth
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{
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get { return _arrowWidth; }
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set
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{
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_arrowWidth = value;
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Draw(); // 触发重绘
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}
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}
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[Browsable(true), EditorBrowsable(EditorBrowsableState.Always), DesignerSerializationVisibility(DesignerSerializationVisibility.Visible)]
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public int ArrowHeight
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{
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get { return _arrowHeight; }
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set
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{
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_arrowHeight = value;
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Draw(); // 触发重绘
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}
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}
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[Browsable(true), EditorBrowsable(EditorBrowsableState.Always), DesignerSerializationVisibility(DesignerSerializationVisibility.Visible)]
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public LineDirection Angle
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{
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get { return _angle; }
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set
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{
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_angle = value;
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CalculatePoint(); // 重新计算终点位置
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Draw(); // 触发重绘
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}
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}
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[Browsable(true), EditorBrowsable(EditorBrowsableState.Always), DesignerSerializationVisibility(DesignerSerializationVisibility.Visible)]
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public ArrowType ArrowType
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{
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get { return _arrowType; }
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set
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{
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_arrowType = value;
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CalculatePoint(); // 重新计算终点位置
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Draw(); // 触发重绘
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}
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}
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// 构造函数
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public ucArrowLine()
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{
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InitializeComponent();
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SetStyle(ControlStyles.ResizeRedraw | ControlStyles.SupportsTransparentBackColor, value: true);
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SetStyle(ControlStyles.Selectable, value: false);
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BackColor = Color.Transparent;
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this.Resize += new EventHandler(this.ArrowLineControl_Resize);
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this.Size = new Size(300, 100); // 设置控件大小
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}
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// 控件大小改变时调整
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private void ArrowLineControl_Resize(object sender, EventArgs e)
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{
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CalculatePoint();
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Draw();
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}
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// 根据方向更新起点和终点
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private void CalculatePoint()
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{
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switch (Angle)
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{
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case LineDirection.水平:
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_startPoint = new PointF(0, this.Height / 2);
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_endPoint = new PointF(this.Width - 4, this.Height / 2);
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break;
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case LineDirection.垂直:
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_startPoint = new PointF(this.Width / 2, 0);
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_endPoint = new PointF(this.Width / 2, this.Height);
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break;
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case LineDirection.左上右下:
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_startPoint = new PointF(0, 0);
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_endPoint = new PointF(this.Width, this.Height);
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break;
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case LineDirection.左下右上:
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_startPoint = new PointF(0, this.Height);
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_endPoint = new PointF(this.Width, 0);
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break;
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}
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}
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private Bitmap bmp;
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// 重写OnPaint方法
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private void Draw()
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{
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bmp = new Bitmap(base.Width, base.Height);
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Graphics graphics = Graphics.FromImage(bmp);
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graphics.SmoothingMode = SmoothingMode.AntiAlias;
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graphics.PixelOffsetMode = PixelOffsetMode.HighQuality;
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// 绘制线段
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Pen linePen = new Pen(LineColor, _lineWidth);
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graphics.DrawLine(linePen, _startPoint, _endPoint);
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switch (_arrowType)
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{
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case ArrowType.结束箭头:
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graphics.FillPolygon(linePen.Brush, DrawArrow(graphics, _startPoint, _endPoint, ArrowWidth, ArrowHeight));
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break;
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case ArrowType.开始箭头:
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graphics.FillPolygon(linePen.Brush, DrawArrow(graphics, _endPoint, _startPoint, ArrowWidth, ArrowHeight));
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break;
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case ArrowType.双箭头:
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graphics.FillPolygon(linePen.Brush, DrawArrow(graphics, _startPoint, _endPoint, ArrowWidth, ArrowHeight));
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graphics.FillPolygon(linePen.Brush, DrawArrow(graphics, _endPoint, _startPoint, ArrowWidth, ArrowHeight));
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break;
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default:
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break;
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}
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BackgroundImage = bmp;
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//设置显示区域，区域外透明
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RegionControl(_startPoint, _endPoint);
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linePen.Dispose();
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graphics.Dispose();
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}
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/// <summary>
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/// 获取箭头的三个点
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/// </summary>
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/// <returns></returns>
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private PointF[] DrawArrow(Graphics g, PointF start, PointF end, int arrowWidth, int arrowHeigth)
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{
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double angle = Math.Atan2(end.Y - start.Y, end.X - start.X);
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double left_x = end.X - arrowWidth * Math.Cos(angle);
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double left_y = end.Y - arrowWidth * Math.Sin(angle);
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PointF p1 = end;
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PointF p2 = new PointF
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{
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X = (float)(left_x + (arrowHeigth / 2) * Math.Cos(angle + Math.PI / 2)),
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Y = (float)(left_y + (arrowHeigth / 2) * Math.Sin(angle + Math.PI / 2))
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};
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PointF p3 = new PointF
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{
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X = (float)(left_x - (arrowHeigth / 2) * Math.Cos(angle + Math.PI / 2)),
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Y = (float)(left_y - (arrowHeigth / 2) * Math.Sin(angle + Math.PI / 2))
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};
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return new PointF[] { p1, p2, p3 };
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}
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private void RegionControl(PointF start, PointF end)
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{
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PointF[] points = new PointF[] { };
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//设置区域，区域外透明
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switch (_arrowType)
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{
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case ArrowType.无箭头:
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points = GetNoArrowRegion(_startPoint, _endPoint);
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break;
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case ArrowType.结束箭头:
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points = GetEndArrowRegion(_startPoint, _endPoint);
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break;
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case ArrowType.开始箭头:
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points = GetEndArrowRegion(_endPoint, _startPoint);
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break;
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case ArrowType.双箭头:
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points = GetBothArrowRegion(_startPoint, _endPoint);
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break;
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default:
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break;
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}
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GraphicsPath graphicsPath = new GraphicsPath();
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graphicsPath.AddPolygon(points);
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Region region = new Region(graphicsPath);
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this.Region = region;
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}
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private PointF[] GetNoArrowRegion(PointF start, PointF end)
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{
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double angle = Math.Atan2(end.Y - start.Y, end.X - start.X);
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PointF p1 = new PointF
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{
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X = (float)(start.X - (_lineWidth / 2) * Math.Cos(angle + Math.PI / 2)),
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Y = (float)(start.Y - (_lineWidth / 2) * Math.Sin(angle + Math.PI / 2))
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};
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PointF p2 = new PointF
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{
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X = (float)(start.X + (_lineWidth / 2) * Math.Cos(angle + Math.PI / 2)),
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Y = (float)(start.Y + (_lineWidth / 2) * Math.Sin(angle + Math.PI / 2))
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};
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PointF p3 = new PointF
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{
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X = (float)(end.X + (_lineWidth / 2) * Math.Cos(angle + Math.PI / 2)),
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Y = (float)(end.Y + (_lineWidth / 2) * Math.Sin(angle + Math.PI / 2))
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};
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PointF p4 = new PointF
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{
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X = (float)(end.X - (_lineWidth / 2) * Math.Cos(angle + Math.PI / 2)),
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Y = (float)(end.Y - (_lineWidth / 2) * Math.Sin(angle + Math.PI / 2))
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};
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return new PointF[] { p1, p2, p3, p4 };
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}
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private PointF[] GetEndArrowRegion(PointF start, PointF end)
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{
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double length = Math.Sqrt((end.Y - start.Y) * (end.Y - start.Y) + (end.X - start.X) * (end.X - start.X));
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double angle = Math.Atan2(end.Y - start.Y, end.X - start.X);
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double left_x = end.X - ArrowWidth * Math.Cos(angle);
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double left_y = end.Y - ArrowWidth * Math.Sin(angle);
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PointF p1 = new PointF
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{
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X = (float)(start.X - (_lineWidth / 2) * Math.Cos(angle + Math.PI / 2)),
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Y = (float)(start.Y - (_lineWidth / 2) * Math.Sin(angle + Math.PI / 2))
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};
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PointF p2 = new PointF
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{
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X = (float)(start.X + (_lineWidth / 2) * Math.Cos(angle + Math.PI / 2)),
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Y = (float)(start.Y + (_lineWidth / 2) * Math.Sin(angle + Math.PI / 2))
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};
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PointF p3 = new PointF
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{
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X = (float)(left_x + (_lineWidth / 2) * Math.Cos(angle + Math.PI / 2)),
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Y = (float)(left_y + (_lineWidth / 2) * Math.Sin(angle + Math.PI / 2))
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};
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PointF p4 = new PointF
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{
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X = (float)(left_x + (ArrowHeight / 2) * Math.Cos(angle + Math.PI / 2)),
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Y = (float)(left_y + (ArrowHeight / 2) * Math.Sin(angle + Math.PI / 2))
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};
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PointF p5 = end;
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PointF p6 = new PointF
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{
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X = (float)(left_x - (ArrowHeight / 2) * Math.Cos(angle + Math.PI / 2)),
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Y = (float)(left_y - (ArrowHeight / 2) * Math.Sin(angle + Math.PI / 2))
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};
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PointF p7 = new PointF
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{
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X = (float)(left_x - (_lineWidth / 2) * Math.Cos(angle + Math.PI / 2)),
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Y = (float)(left_y - (_lineWidth / 2) * Math.Sin(angle + Math.PI / 2))
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};
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return new PointF[] { p1, p2, p3, p4, p5, p6, p7 };
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}
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private PointF[] GetBothArrowRegion(PointF start, PointF end)
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{
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double length = Math.Sqrt((end.Y - start.Y) * (end.Y - start.Y) + (end.X - start.X) * (end.X - start.X));
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double angle = Math.Atan2(end.Y - start.Y, end.X - start.X);
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double left_end_x = end.X - ArrowWidth * Math.Cos(angle);
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double left_end_y = end.Y - ArrowWidth * Math.Sin(angle);
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double left_start_x = start.X + ArrowWidth * Math.Cos(angle);
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double left_start_y = start.Y + ArrowWidth * Math.Sin(angle);
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PointF p1 = new PointF
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{
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X = (float)(left_start_x - (_lineWidth / 2) * Math.Cos(angle + Math.PI / 2)),
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Y = (float)(left_start_y - (_lineWidth / 2) * Math.Sin(angle + Math.PI / 2))
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};
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PointF p2 = new PointF
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{
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X = (float)(left_start_x - (ArrowHeight / 2) * Math.Cos(angle + Math.PI / 2)),
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Y = (float)(left_start_y - (ArrowHeight / 2) * Math.Sin(angle + Math.PI / 2))
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};
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PointF p3 = start;
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PointF p4 = new PointF
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{
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X = (float)(left_start_x + (ArrowHeight / 2) * Math.Cos(angle + Math.PI / 2)),
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Y = (float)(left_start_y + (ArrowHeight / 2) * Math.Sin(angle + Math.PI / 2))
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};
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PointF p5 = new PointF
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{
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X = (float)(left_start_x + (_lineWidth / 2) * Math.Cos(angle + Math.PI / 2)),
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Y = (float)(left_start_y + (_lineWidth / 2) * Math.Sin(angle + Math.PI / 2))
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};
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PointF p6 = new PointF
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{
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X = (float)(left_end_x + (_lineWidth / 2) * Math.Cos(angle + Math.PI / 2)),
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Y = (float)(left_end_y + (_lineWidth / 2) * Math.Sin(angle + Math.PI / 2))
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};
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PointF p7 = new PointF
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{
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X = (float)(left_end_x + (ArrowHeight / 2) * Math.Cos(angle + Math.PI / 2)),
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Y = (float)(left_end_y + (ArrowHeight / 2) * Math.Sin(angle + Math.PI / 2))
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};
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PointF p8 = end;
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PointF p9 = new PointF
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{
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X = (float)(left_end_x - (ArrowHeight / 2) * Math.Cos(angle + Math.PI / 2)),
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Y = (float)(left_end_y - (ArrowHeight / 2) * Math.Sin(angle + Math.PI / 2))
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};
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PointF p10 = new PointF
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{
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X = (float)(left_end_x - (_lineWidth / 2) * Math.Cos(angle + Math.PI / 2)),
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Y = (float)(left_end_y - (_lineWidth / 2) * Math.Sin(angle + Math.PI / 2))
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};
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return new PointF[] { p1, p2, p3, p4, p5, p6, p7, p8, p9, p10 };
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}
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private void RegionControl()
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{
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//设置区域，区域外透明
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Point[] points = new Point[4]
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{
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new Point(0, this.Height / 2 + _lineWidth/2),
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new Point(0, this.Height / 2 - _lineWidth/2),
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new Point(this.Width, this.Height / 2 - _lineWidth/2),
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new Point(this.Width, this.Height / 2 + _lineWidth/2)
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};
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switch (Angle)
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{
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case LineDirection.水平:
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points = new Point[4]
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{
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new Point(0, this.Height / 2 + _lineWidth/2),
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new Point(0, this.Height / 2 - _lineWidth/2),
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new Point(this.Width, this.Height / 2 - _lineWidth/2),
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new Point(this.Width, this.Height / 2 + _lineWidth/2)
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};
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break;
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case LineDirection.垂直:
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points = new Point[4]
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{
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new Point(this.Width/2 - _lineWidth/2, 0),
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new Point(this.Width/2 + _lineWidth/2, 0),
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new Point(this.Width/2 + _lineWidth/2, this.Height),
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new Point(this.Width/2 - _lineWidth/2, this.Height)
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};
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break;
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case LineDirection.左上右下:
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points = new Point[4]
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{
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new Point(0, base.Height / 2 + _lineWidth/2),
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new Point(0, base.Height / 2 - _lineWidth/2),
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new Point(base.Width, base.Height / 2 - _lineWidth/2),
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new Point(base.Width, base.Height / 2 + _lineWidth/2)
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};
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break;
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case LineDirection.左下右上:
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points = new Point[4]
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{
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new Point(0, base.Height / 2 + _lineWidth/2),
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new Point(0, base.Height / 2 - _lineWidth/2),
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new Point(base.Width, base.Height / 2 - _lineWidth/2),
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new Point(base.Width, base.Height / 2 + _lineWidth/2)
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};
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break;
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}
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GraphicsPath graphicsPath = new GraphicsPath();
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graphicsPath.AddPolygon(points);
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Region region = new Region(graphicsPath);
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this.Region = region;
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}
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}
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}
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Reference in New Issue
Block a user
