（六十三）c#Winform自定义控件-箭头（工业）-HZHControls
官网
前提
入行已经7,8年了，一直想做一套漂亮点的自定义控件，于是就有了本系列文章。
GitHub：https://github.com/kwwwvagaa/NetWinformControl
码云：https://gitee.com/kwwwvagaa/net_winform_custom_control.git
如果觉得写的还行，请点个 star 支持一下吧
欢迎前来交流探讨： 企鹅群568015492 
麻烦博客下方点个【推荐】，谢谢
NuGet
Install-Package HZH_Controls
目录
https://www.cnblogs.com/bfyx/p/11364884.html
用处及效果
准备工作
依然用GDI+，请自行百度了解
开始
添加一个类UCArrow，继承UserControl
添加枚举，控制方向
/// <summary>
/// Enum ArrowDirection
/// </summary>
public enum ArrowDirection
{
/// <summary>
/// The left
/// </summary>
Left,
/// <summary>
/// The right
/// </summary>
Right,
/// <summary>
/// The top
/// </summary>
Top,
/// <summary>
/// The bottom
/// </summary>
Bottom,
/// <summary>
/// The left right
/// </summary>
Left_Right,
/// <summary>
/// The top bottom
/// </summary>
Top_Bottom
}
一些属性
/// <summary>
/// The arrow color
/// </summary>
private Color arrowColor = Color.FromArgb(, , ); /// <summary>
/// Gets or sets the color of the arrow.
/// </summary>
/// <value>The color of the arrow.</value>
[Description("箭头颜色"), Category("自定义")]
public Color ArrowColor
{
get { return arrowColor; }
set
{
arrowColor = value;
Refresh();
}
} /// <summary>
/// The border color
/// </summary>
private Color? borderColor = null; /// <summary>
/// Gets or sets the color of the border.
/// </summary>
/// <value>The color of the border.</value>
[Description("箭头边框颜色，为空则无边框"), Category("自定义")]
public Color? BorderColor
{
get { return borderColor; }
set
{
borderColor = value;
Refresh();
}
} /// <summary>
/// The direction
/// </summary>
private ArrowDirection direction = ArrowDirection.Right; /// <summary>
/// Gets or sets the direction.
/// </summary>
/// <value>The direction.</value>
[Description("箭头方向"), Category("自定义")]
public ArrowDirection Direction
{
get { return direction; }
set
{
direction = value;
ResetPath();
Refresh();
}
}
/// <summary>
/// 获取或设置控件显示的文字的字体。
/// </summary>
/// <value>The font.</value>
/// <PermissionSet>
/// <IPermission class="System.Security.Permissions.EnvironmentPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />
/// <IPermission class="System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />
/// <IPermission class="System.Security.Permissions.SecurityPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Flags="UnmanagedCode, ControlEvidence" />
/// <IPermission class="System.Diagnostics.PerformanceCounterPermission, System, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />
/// </PermissionSet>
public override Font Font
{
get
{
return base.Font;
}
set
{
base.Font = value;
Refresh();
}
}
/// <summary>
/// 获取或设置控件的前景色。
/// </summary>
/// <value>The color of the fore.</value>
/// <PermissionSet>
/// <IPermission class="System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />
/// </PermissionSet>
public override Color ForeColor
{
get
{
return base.ForeColor;
}
set
{
base.ForeColor = value;
Refresh();
}
}
/// <summary>
/// The text
/// </summary>
private string text;
/// <summary>
/// Gets or sets the text.
/// </summary>
/// <value>The text.</value>
[Bindable(true)]
[Browsable(true)]
[DesignerSerializationVisibility(DesignerSerializationVisibility.Visible)]
[EditorBrowsable(EditorBrowsableState.Always)]
[Localizable(true)]
[Description("箭头文字"), Category("自定义")]
public override string Text
{
get
{
return text;
}
set
{
text = value;
Refresh();
}
}
/// <summary>
/// The m path
/// </summary>
GraphicsPath m_path;
根据方向和大小设置path
private void ResetPath()
{
Point[] ps = null;
switch (direction)
{
case ArrowDirection.Left:
ps = new Point[]
{
new Point(,this.Height/),
new Point(,),
new Point(,this.Height/),
new Point(this.Width-,this.Height/),
new Point(this.Width-,this.Height-this.Height/),
new Point(,this.Height-this.Height/),
new Point(,this.Height),
new Point(,this.Height/)
};
break;
case ArrowDirection.Right:
ps = new Point[]
{
new Point(,this.Height/),
new Point(this.Width-,this.Height/),
new Point(this.Width-,),
new Point(this.Width-,this.Height/),
new Point(this.Width-,this.Height),
new Point(this.Width-,this.Height-this.Height/),
new Point(,this.Height-this.Height/),
new Point(,this.Height/)
};
break;
case ArrowDirection.Top:
ps = new Point[]
{
new Point(this.Width/,),
new Point(this.Width,),
new Point(this.Width-this.Width/,),
new Point(this.Width-this.Width/,this.Height-),
new Point(this.Width/,this.Height-),
new Point(this.Width/,),
new Point(,),
new Point(this.Width/,),
};
break;
case ArrowDirection.Bottom:
ps = new Point[]
{
new Point(this.Width-this.Width/,),
new Point(this.Width-this.Width/,this.Height-),
new Point(this.Width,this.Height-),
new Point(this.Width/,this.Height-),
new Point(,this.Height-),
new Point(this.Width/,this.Height-),
new Point(this.Width/,),
new Point(this.Width-this.Width/,),
};
break;
case ArrowDirection.Left_Right:
ps = new Point[]
{
new Point(,this.Height/),
new Point(,),
new Point(,this.Height/),
new Point(this.Width-,this.Height/),
new Point(this.Width-,),
new Point(this.Width-,this.Height/),
new Point(this.Width-,this.Height),
new Point(this.Width-,this.Height-this.Height/),
new Point(,this.Height-this.Height/),
new Point(,this.Height),
new Point(,this.Height/),
};
break;
case ArrowDirection.Top_Bottom:
ps = new Point[]
{
new Point(this.Width/,),
new Point(this.Width,),
new Point(this.Width-this.Width/,),
new Point(this.Width-this.Width/,this.Height-),
new Point(this.Width,this.Height-),
new Point(this.Width/,this.Height-),
new Point(,this.Height-),
new Point(this.Width/,this.Height-),
new Point(this.Width/,),
new Point(,),
new Point(this.Width/,),
};
break;
}
m_path = new GraphicsPath();
m_path.AddLines(ps);
m_path.CloseAllFigures();
}
重绘
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
var g = e.Graphics;
g.SetGDIHigh(); g.FillPath(new SolidBrush(arrowColor), m_path); if (borderColor != null && borderColor != Color.Empty)
g.DrawPath(new Pen(new SolidBrush(borderColor.Value)), m_path);
if (!string.IsNullOrEmpty(text))
{
var size = g.MeasureString(Text, Font);
g.DrawString(Text, Font, new SolidBrush(ForeColor), new PointF((this.Width - size.Width) / , (this.Height - size.Height) / ));
}
}
完整代码
// ***********************************************************************
// Assembly : HZH_Controls
// Created : 2019-09-10
//
// ***********************************************************************
// <copyright file="UCArrow.cs">
// Copyright by Huang Zhenghui(黄正辉) All, QQ group:568015492 QQ:623128629 Email:623128629@qq.com
// </copyright>
//
// Blog: https://www.cnblogs.com/bfyx
// GitHub：https://github.com/kwwwvagaa/NetWinformControl
// gitee：https://gitee.com/kwwwvagaa/net_winform_custom_control.git
//
// If you use this code, please keep this note.
// ***********************************************************************
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.ComponentModel; namespace HZH_Controls.Controls
{
/// <summary>
/// Class UCArrow.
/// Implements the <see cref="System.Windows.Forms.UserControl" />
/// </summary>
/// <seealso cref="System.Windows.Forms.UserControl" />
public class UCArrow : UserControl
{
/// <summary>
/// The arrow color
/// </summary>
private Color arrowColor = Color.FromArgb(, , ); /// <summary>
/// Gets or sets the color of the arrow.
/// </summary>
/// <value>The color of the arrow.</value>
[Description("箭头颜色"), Category("自定义")]
public Color ArrowColor
{
get { return arrowColor; }
set
{
arrowColor = value;
Refresh();
}
} /// <summary>
/// The border color
/// </summary>
private Color? borderColor = null; /// <summary>
/// Gets or sets the color of the border.
/// </summary>
/// <value>The color of the border.</value>
[Description("箭头边框颜色，为空则无边框"), Category("自定义")]
public Color? BorderColor
{
get { return borderColor; }
set
{
borderColor = value;
Refresh();
}
} /// <summary>
/// The direction
/// </summary>
private ArrowDirection direction = ArrowDirection.Right; /// <summary>
/// Gets or sets the direction.
/// </summary>
/// <value>The direction.</value>
[Description("箭头方向"), Category("自定义")]
public ArrowDirection Direction
{
get { return direction; }
set
{
direction = value;
ResetPath();
Refresh();
}
}
/// <summary>
/// 获取或设置控件显示的文字的字体。
/// </summary>
/// <value>The font.</value>
/// <PermissionSet>
/// <IPermission class="System.Security.Permissions.EnvironmentPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />
/// <IPermission class="System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />
/// <IPermission class="System.Security.Permissions.SecurityPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Flags="UnmanagedCode, ControlEvidence" />
/// <IPermission class="System.Diagnostics.PerformanceCounterPermission, System, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />
/// </PermissionSet>
public override Font Font
{
get
{
return base.Font;
}
set
{
base.Font = value;
Refresh();
}
}
/// <summary>
/// 获取或设置控件的前景色。
/// </summary>
/// <value>The color of the fore.</value>
/// <PermissionSet>
/// <IPermission class="System.Security.Permissions.FileIOPermission, mscorlib, Version=2.0.3600.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" version="1" Unrestricted="true" />
/// </PermissionSet>
public override Color ForeColor
{
get
{
return base.ForeColor;
}
set
{
base.ForeColor = value;
Refresh();
}
}
/// <summary>
/// The text
/// </summary>
private string text;
/// <summary>
/// Gets or sets the text.
/// </summary>
/// <value>The text.</value>
[Bindable(true)]
[Browsable(true)]
[DesignerSerializationVisibility(DesignerSerializationVisibility.Visible)]
[EditorBrowsable(EditorBrowsableState.Always)]
[Localizable(true)]
[Description("箭头文字"), Category("自定义")]
public override string Text
{
get
{
return text;
}
set
{
text = value;
Refresh();
}
}
/// <summary>
/// The m path
/// </summary>
GraphicsPath m_path;
/// <summary>
/// Initializes a new instance of the <see cref="UCArrow"/> class.
/// </summary>
public UCArrow()
{
this.SetStyle(ControlStyles.AllPaintingInWmPaint, true);
this.SetStyle(ControlStyles.DoubleBuffer, true);
this.SetStyle(ControlStyles.ResizeRedraw, true);
this.SetStyle(ControlStyles.Selectable, true);
this.SetStyle(ControlStyles.SupportsTransparentBackColor, true);
this.SetStyle(ControlStyles.UserPaint, true);
this.ForeColor = Color.White;
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.None;
this.SizeChanged += UCArrow_SizeChanged;
this.Size = new Size(, );
} /// <summary>
/// Handles the SizeChanged event of the UCArrow control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="EventArgs"/> instance containing the event data.</param>
void UCArrow_SizeChanged(object sender, EventArgs e)
{
ResetPath();
} /// <summary>
/// Resets the path.
/// </summary>
private void ResetPath()
{
Point[] ps = null;
switch (direction)
{
case ArrowDirection.Left:
ps = new Point[]
{
new Point(,this.Height/),
new Point(,),
new Point(,this.Height/),
new Point(this.Width-,this.Height/),
new Point(this.Width-,this.Height-this.Height/),
new Point(,this.Height-this.Height/),
new Point(,this.Height),
new Point(,this.Height/)
};
break;
case ArrowDirection.Right:
ps = new Point[]
{
new Point(,this.Height/),
new Point(this.Width-,this.Height/),
new Point(this.Width-,),
new Point(this.Width-,this.Height/),
new Point(this.Width-,this.Height),
new Point(this.Width-,this.Height-this.Height/),
new Point(,this.Height-this.Height/),
new Point(,this.Height/)
};
break;
case ArrowDirection.Top:
ps = new Point[]
{
new Point(this.Width/,),
new Point(this.Width,),
new Point(this.Width-this.Width/,),
new Point(this.Width-this.Width/,this.Height-),
new Point(this.Width/,this.Height-),
new Point(this.Width/,),
new Point(,),
new Point(this.Width/,),
};
break;
case ArrowDirection.Bottom:
ps = new Point[]
{
new Point(this.Width-this.Width/,),
new Point(this.Width-this.Width/,this.Height-),
new Point(this.Width,this.Height-),
new Point(this.Width/,this.Height-),
new Point(,this.Height-),
new Point(this.Width/,this.Height-),
new Point(this.Width/,),
new Point(this.Width-this.Width/,),
};
break;
case ArrowDirection.Left_Right:
ps = new Point[]
{
new Point(,this.Height/),
new Point(,),
new Point(,this.Height/),
new Point(this.Width-,this.Height/),
new Point(this.Width-,),
new Point(this.Width-,this.Height/),
new Point(this.Width-,this.Height),
new Point(this.Width-,this.Height-this.Height/),
new Point(,this.Height-this.Height/),
new Point(,this.Height),
new Point(,this.Height/),
};
break;
case ArrowDirection.Top_Bottom:
ps = new Point[]
{
new Point(this.Width/,),
new Point(this.Width,),
new Point(this.Width-this.Width/,),
new Point(this.Width-this.Width/,this.Height-),
new Point(this.Width,this.Height-),
new Point(this.Width/,this.Height-),
new Point(,this.Height-),
new Point(this.Width/,this.Height-),
new Point(this.Width/,),
new Point(,),
new Point(this.Width/,),
};
break;
}
m_path = new GraphicsPath();
m_path.AddLines(ps);
m_path.CloseAllFigures();
} /// <summary>
/// 引发 <see cref="E:System.Windows.Forms.Control.Paint" /> 事件。
/// </summary>
/// <param name="e">包含事件数据的 <see cref="T:System.Windows.Forms.PaintEventArgs" />。</param>
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
var g = e.Graphics;
g.SetGDIHigh(); g.FillPath(new SolidBrush(arrowColor), m_path); if (borderColor != null && borderColor != Color.Empty)
g.DrawPath(new Pen(new SolidBrush(borderColor.Value)), m_path);
if (!string.IsNullOrEmpty(text))
{
var size = g.MeasureString(Text, Font);
g.DrawString(Text, Font, new SolidBrush(ForeColor), new PointF((this.Width - size.Width) / , (this.Height - size.Height) / ));
}
}
} /// <summary>
/// Enum ArrowDirection
/// </summary>
public enum ArrowDirection
{
/// <summary>
/// The left
/// </summary>
Left,
/// <summary>
/// The right
/// </summary>
Right,
/// <summary>
/// The top
/// </summary>
Top,
/// <summary>
/// The bottom
/// </summary>
Bottom,
/// <summary>
/// The left right
/// </summary>
Left_Right,
/// <summary>
/// The top bottom
/// </summary>
Top_Bottom
}
}
最后的话
如果你喜欢的话，请到 https://gitee.com/kwwwvagaa/net_winform_custom_control 点个星星吧
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