（四十）c#Winform自定义控件-开关-HZHControls
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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
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目录
https://www.cnblogs.com/bfyx/p/11364884.html
准备工作
GDI+需要有一点了解，不知道的可以百度瞅瞅
开始
添加一个用户控件，命名UCSwitch
添加一个枚举用以控制样式
public enum SwitchType
{
/// <summary>
/// 椭圆
/// </summary>
Ellipse,
/// <summary>
/// 四边形
/// </summary>
Quadrilateral,
/// <summary>
/// 横线
/// </summary>
Line
}
添加属性
[Description("选中改变事件"), Category("自定义")]
public event EventHandler CheckedChanged;
private Color m_trueColor = Color.FromArgb(, , );
[Description("选中时颜色"), Category("自定义")]
public Color TrueColor
{
get { return m_trueColor; }
set
{
m_trueColor = value;
Refresh();
}
}
private Color m_falseColor = Color.FromArgb(, , );
[Description("没有选中时颜色"), Category("自定义")]
public Color FalseColor
{
get { return m_falseColor; }
set
{
m_falseColor = value;
Refresh();
}
}
private bool m_checked;
[Description("是否选中"), Category("自定义")]
public bool Checked
{
get { return m_checked; }
set
{
m_checked = value;
Refresh();
if (CheckedChanged != null)
{
CheckedChanged(this, null);
}
}
}
private string[] m_texts;
[Description("文本值，当选中或没有选中时显示，必须是长度为2的数组"), Category("自定义")]
public string[] Texts
{
get { return m_texts; }
set
{
m_texts = value;
Refresh();
}
}
private SwitchType m_switchType = SwitchType.Ellipse;
[Description("显示类型"), Category("自定义")]
public SwitchType SwitchType
{
get { return m_switchType; }
set
{
m_switchType = value;
Refresh();
}
}
public override Font Font
{
get
{
return base.Font;
}
set
{
base.Font = value;
Refresh();
}
}
重绘
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
var g = e.Graphics;
g.SetGDIHigh();
if (m_switchType == HZH_Controls.Controls.SwitchType.Ellipse)
{
var fillColor = m_checked ? m_trueColor : m_falseColor;
GraphicsPath path = new GraphicsPath();
path.AddLine(new Point(this.Height / , ), new Point(this.Width - this.Height / , ));
path.AddArc(new Rectangle(this.Width - this.Height - , , this.Height - , this.Height - ), -, );
path.AddLine(new Point(this.Width - this.Height / , this.Height - ), new Point(this.Height / , this.Height - ));
path.AddArc(new Rectangle(, , this.Height - , this.Height - ), , );
g.FillPath(new SolidBrush(fillColor), path); string strText = string.Empty;
if (m_texts != null && m_texts.Length == )
{
if (m_checked)
{
strText = m_texts[];
}
else
{
strText = m_texts[];
}
} if (m_checked)
{
g.FillEllipse(Brushes.White, new Rectangle(this.Width - this.Height - + , + , this.Height - - , this.Height - - ));
if (string.IsNullOrEmpty(strText))
{
g.DrawEllipse(new Pen(Color.White, ), new Rectangle((this.Height - - ) / - ((this.Height - - ) / ) / , (this.Height - - (this.Height - - ) / ) / + , (this.Height - - ) / , (this.Height - - ) / ));
}
else
{
System.Drawing.SizeF sizeF = g.MeasureString(strText.Replace(" ", "A"), Font);
int intTextY = (this.Height - (int)sizeF.Height) / + ;
g.DrawString(strText, Font, Brushes.White, new Point((this.Height - - ) / , intTextY));
}
}
else
{
g.FillEllipse(Brushes.White, new Rectangle( + , + , this.Height - - , this.Height - - ));
if (string.IsNullOrEmpty(strText))
{
g.DrawEllipse(new Pen(Color.White, ), new Rectangle(this.Width - - (this.Height - - ) / - ((this.Height - - ) / ) / , (this.Height - - (this.Height - - ) / ) / + , (this.Height - - ) / , (this.Height - - ) / ));
}
else
{
System.Drawing.SizeF sizeF = g.MeasureString(strText.Replace(" ", "A"), Font);
int intTextY = (this.Height - (int)sizeF.Height) / + ;
g.DrawString(strText, Font, Brushes.White, new Point(this.Width - - (this.Height - - ) / - ((this.Height - - ) / ) / - (int)sizeF.Width / , intTextY));
}
}
}
else if (m_switchType == HZH_Controls.Controls.SwitchType.Quadrilateral)
{
var fillColor = m_checked ? m_trueColor : m_falseColor;
GraphicsPath path = new GraphicsPath();
int intRadius = ;
path.AddArc(, , intRadius, intRadius, 180f, 90f);
path.AddArc(this.Width - intRadius - , , intRadius, intRadius, 270f, 90f);
path.AddArc(this.Width - intRadius - , this.Height - intRadius - , intRadius, intRadius, 0f, 90f);
path.AddArc(, this.Height - intRadius - , intRadius, intRadius, 90f, 90f); g.FillPath(new SolidBrush(fillColor), path); string strText = string.Empty;
if (m_texts != null && m_texts.Length == )
{
if (m_checked)
{
strText = m_texts[];
}
else
{
strText = m_texts[];
}
} if (m_checked)
{
GraphicsPath path2 = new GraphicsPath();
path2.AddArc(this.Width - this.Height - + , + , intRadius, intRadius, 180f, 90f);
path2.AddArc(this.Width - - - intRadius, + , intRadius, intRadius, 270f, 90f);
path2.AddArc(this.Width - - - intRadius, this.Height - - intRadius - , intRadius, intRadius, 0f, 90f);
path2.AddArc(this.Width - this.Height - + , this.Height - - intRadius - , intRadius, intRadius, 90f, 90f);
g.FillPath(Brushes.White, path2); if (string.IsNullOrEmpty(strText))
{
g.DrawEllipse(new Pen(Color.White, ), new Rectangle((this.Height - - ) / - ((this.Height - - ) / ) / , (this.Height - - (this.Height - - ) / ) / + , (this.Height - - ) / , (this.Height - - ) / ));
}
else
{
System.Drawing.SizeF sizeF = g.MeasureString(strText.Replace(" ", "A"), Font);
int intTextY = (this.Height - (int)sizeF.Height) / + ;
g.DrawString(strText, Font, Brushes.White, new Point((this.Height - - ) / , intTextY));
}
}
else
{
GraphicsPath path2 = new GraphicsPath();
path2.AddArc( + , + , intRadius, intRadius, 180f, 90f);
path2.AddArc(this.Height - - intRadius, + , intRadius, intRadius, 270f, 90f);
path2.AddArc(this.Height - - intRadius, this.Height - - intRadius - , intRadius, intRadius, 0f, 90f);
path2.AddArc( + , this.Height - - intRadius - , intRadius, intRadius, 90f, 90f);
g.FillPath(Brushes.White, path2); //g.FillEllipse(Brushes.White, new Rectangle(1 + 2, 1 + 2, this.Height - 2 - 4, this.Height - 2 - 4));
if (string.IsNullOrEmpty(strText))
{
g.DrawEllipse(new Pen(Color.White, ), new Rectangle(this.Width - - (this.Height - - ) / - ((this.Height - - ) / ) / , (this.Height - - (this.Height - - ) / ) / + , (this.Height - - ) / , (this.Height - - ) / ));
}
else
{
System.Drawing.SizeF sizeF = g.MeasureString(strText.Replace(" ", "A"), Font);
int intTextY = (this.Height - (int)sizeF.Height) / + ;
g.DrawString(strText, Font, Brushes.White, new Point(this.Width - - (this.Height - - ) / - ((this.Height - - ) / ) / - (int)sizeF.Width / , intTextY));
}
}
}
else
{
var fillColor = m_checked ? m_trueColor : m_falseColor;
int intLineHeight = (this.Height - - ) / ; GraphicsPath path = new GraphicsPath();
path.AddLine(new Point(this.Height / , (this.Height - intLineHeight) / ), new Point(this.Width - this.Height / , (this.Height - intLineHeight) / ));
path.AddArc(new Rectangle(this.Width - this.Height / - intLineHeight - , (this.Height - intLineHeight) / , intLineHeight, intLineHeight), -, );
path.AddLine(new Point(this.Width - this.Height / , (this.Height - intLineHeight) / + intLineHeight), new Point(this.Width - this.Height / , (this.Height - intLineHeight) / + intLineHeight));
path.AddArc(new Rectangle(this.Height / , (this.Height - intLineHeight) / , intLineHeight, intLineHeight), , );
g.FillPath(new SolidBrush(fillColor), path); if (m_checked)
{
g.FillEllipse(new SolidBrush(fillColor), new Rectangle(this.Width - this.Height - + , + , this.Height - - , this.Height - - ));
g.FillEllipse(Brushes.White, new Rectangle(this.Width - - (this.Height - - ) / - ((this.Height - - ) / ) / - , (this.Height - - (this.Height - - ) / ) / + , (this.Height - - ) / , (this.Height - - ) / ));
}
else
{
g.FillEllipse(new SolidBrush(fillColor), new Rectangle( + , + , this.Height - - , this.Height - - ));
g.FillEllipse(Brushes.White, new Rectangle((this.Height - - ) / - ((this.Height - - ) / ) / + , (this.Height - - (this.Height - - ) / ) / + , (this.Height - - ) / , (this.Height - - ) / ));
}
}
}
处理一下点击事件
void UCSwitch_MouseDown(object sender, MouseEventArgs e)
{
Checked = !Checked;
}
完整代码
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Drawing.Drawing2D; namespace HZH_Controls.Controls
{
[DefaultEvent("CheckedChanged")]
public partial class UCSwitch : UserControl
{
[Description("选中改变事件"), Category("自定义")]
public event EventHandler CheckedChanged;
private Color m_trueColor = Color.FromArgb(, , ); [Description("选中时颜色"), Category("自定义")]
public Color TrueColor
{
get { return m_trueColor; }
set
{
m_trueColor = value;
Refresh();
}
} private Color m_falseColor = Color.FromArgb(, , ); [Description("没有选中时颜色"), Category("自定义")]
public Color FalseColor
{
get { return m_falseColor; }
set
{
m_falseColor = value;
Refresh();
}
} private bool m_checked; [Description("是否选中"), Category("自定义")]
public bool Checked
{
get { return m_checked; }
set
{
m_checked = value;
Refresh();
if (CheckedChanged != null)
{
CheckedChanged(this, null);
}
}
} private string[] m_texts; [Description("文本值，当选中或没有选中时显示，必须是长度为2的数组"), Category("自定义")]
public string[] Texts
{
get { return m_texts; }
set
{
m_texts = value;
Refresh();
}
}
private SwitchType m_switchType = SwitchType.Ellipse; [Description("显示类型"), Category("自定义")]
public SwitchType SwitchType
{
get { return m_switchType; }
set
{
m_switchType = value;
Refresh();
}
} public override Font Font
{
get
{
return base.Font;
}
set
{
base.Font = value;
Refresh();
}
} public UCSwitch()
{
InitializeComponent();
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.MouseDown += UCSwitch_MouseDown;
} void UCSwitch_MouseDown(object sender, MouseEventArgs e)
{
Checked = !Checked;
} protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
var g = e.Graphics;
g.SetGDIHigh();
if (m_switchType == HZH_Controls.Controls.SwitchType.Ellipse)
{
var fillColor = m_checked ? m_trueColor : m_falseColor;
GraphicsPath path = new GraphicsPath();
path.AddLine(new Point(this.Height / , ), new Point(this.Width - this.Height / , ));
path.AddArc(new Rectangle(this.Width - this.Height - , , this.Height - , this.Height - ), -, );
path.AddLine(new Point(this.Width - this.Height / , this.Height - ), new Point(this.Height / , this.Height - ));
path.AddArc(new Rectangle(, , this.Height - , this.Height - ), , );
g.FillPath(new SolidBrush(fillColor), path); string strText = string.Empty;
if (m_texts != null && m_texts.Length == )
{
if (m_checked)
{
strText = m_texts[];
}
else
{
strText = m_texts[];
}
} if (m_checked)
{
g.FillEllipse(Brushes.White, new Rectangle(this.Width - this.Height - + , + , this.Height - - , this.Height - - ));
if (string.IsNullOrEmpty(strText))
{
g.DrawEllipse(new Pen(Color.White, ), new Rectangle((this.Height - - ) / - ((this.Height - - ) / ) / , (this.Height - - (this.Height - - ) / ) / + , (this.Height - - ) / , (this.Height - - ) / ));
}
else
{
System.Drawing.SizeF sizeF = g.MeasureString(strText.Replace(" ", "A"), Font);
int intTextY = (this.Height - (int)sizeF.Height) / + ;
g.DrawString(strText, Font, Brushes.White, new Point((this.Height - - ) / , intTextY));
}
}
else
{
g.FillEllipse(Brushes.White, new Rectangle( + , + , this.Height - - , this.Height - - ));
if (string.IsNullOrEmpty(strText))
{
g.DrawEllipse(new Pen(Color.White, ), new Rectangle(this.Width - - (this.Height - - ) / - ((this.Height - - ) / ) / , (this.Height - - (this.Height - - ) / ) / + , (this.Height - - ) / , (this.Height - - ) / ));
}
else
{
System.Drawing.SizeF sizeF = g.MeasureString(strText.Replace(" ", "A"), Font);
int intTextY = (this.Height - (int)sizeF.Height) / + ;
g.DrawString(strText, Font, Brushes.White, new Point(this.Width - - (this.Height - - ) / - ((this.Height - - ) / ) / - (int)sizeF.Width / , intTextY));
}
}
}
else if (m_switchType == HZH_Controls.Controls.SwitchType.Quadrilateral)
{
var fillColor = m_checked ? m_trueColor : m_falseColor;
GraphicsPath path = new GraphicsPath();
int intRadius = ;
path.AddArc(, , intRadius, intRadius, 180f, 90f);
path.AddArc(this.Width - intRadius - , , intRadius, intRadius, 270f, 90f);
path.AddArc(this.Width - intRadius - , this.Height - intRadius - , intRadius, intRadius, 0f, 90f);
path.AddArc(, this.Height - intRadius - , intRadius, intRadius, 90f, 90f); g.FillPath(new SolidBrush(fillColor), path); string strText = string.Empty;
if (m_texts != null && m_texts.Length == )
{
if (m_checked)
{
strText = m_texts[];
}
else
{
strText = m_texts[];
}
} if (m_checked)
{
GraphicsPath path2 = new GraphicsPath();
path2.AddArc(this.Width - this.Height - + , + , intRadius, intRadius, 180f, 90f);
path2.AddArc(this.Width - - - intRadius, + , intRadius, intRadius, 270f, 90f);
path2.AddArc(this.Width - - - intRadius, this.Height - - intRadius - , intRadius, intRadius, 0f, 90f);
path2.AddArc(this.Width - this.Height - + , this.Height - - intRadius - , intRadius, intRadius, 90f, 90f);
g.FillPath(Brushes.White, path2); if (string.IsNullOrEmpty(strText))
{
g.DrawEllipse(new Pen(Color.White, ), new Rectangle((this.Height - - ) / - ((this.Height - - ) / ) / , (this.Height - - (this.Height - - ) / ) / + , (this.Height - - ) / , (this.Height - - ) / ));
}
else
{
System.Drawing.SizeF sizeF = g.MeasureString(strText.Replace(" ", "A"), Font);
int intTextY = (this.Height - (int)sizeF.Height) / + ;
g.DrawString(strText, Font, Brushes.White, new Point((this.Height - - ) / , intTextY));
}
}
else
{
GraphicsPath path2 = new GraphicsPath();
path2.AddArc( + , + , intRadius, intRadius, 180f, 90f);
path2.AddArc(this.Height - - intRadius, + , intRadius, intRadius, 270f, 90f);
path2.AddArc(this.Height - - intRadius, this.Height - - intRadius - , intRadius, intRadius, 0f, 90f);
path2.AddArc( + , this.Height - - intRadius - , intRadius, intRadius, 90f, 90f);
g.FillPath(Brushes.White, path2); //g.FillEllipse(Brushes.White, new Rectangle(1 + 2, 1 + 2, this.Height - 2 - 4, this.Height - 2 - 4));
if (string.IsNullOrEmpty(strText))
{
g.DrawEllipse(new Pen(Color.White, ), new Rectangle(this.Width - - (this.Height - - ) / - ((this.Height - - ) / ) / , (this.Height - - (this.Height - - ) / ) / + , (this.Height - - ) / , (this.Height - - ) / ));
}
else
{
System.Drawing.SizeF sizeF = g.MeasureString(strText.Replace(" ", "A"), Font);
int intTextY = (this.Height - (int)sizeF.Height) / + ;
g.DrawString(strText, Font, Brushes.White, new Point(this.Width - - (this.Height - - ) / - ((this.Height - - ) / ) / - (int)sizeF.Width / , intTextY));
}
}
}
else
{
var fillColor = m_checked ? m_trueColor : m_falseColor;
int intLineHeight = (this.Height - - ) / ; GraphicsPath path = new GraphicsPath();
path.AddLine(new Point(this.Height / , (this.Height - intLineHeight) / ), new Point(this.Width - this.Height / , (this.Height - intLineHeight) / ));
path.AddArc(new Rectangle(this.Width - this.Height / - intLineHeight - , (this.Height - intLineHeight) / , intLineHeight, intLineHeight), -, );
path.AddLine(new Point(this.Width - this.Height / , (this.Height - intLineHeight) / + intLineHeight), new Point(this.Width - this.Height / , (this.Height - intLineHeight) / + intLineHeight));
path.AddArc(new Rectangle(this.Height / , (this.Height - intLineHeight) / , intLineHeight, intLineHeight), , );
g.FillPath(new SolidBrush(fillColor), path); if (m_checked)
{
g.FillEllipse(new SolidBrush(fillColor), new Rectangle(this.Width - this.Height - + , + , this.Height - - , this.Height - - ));
g.FillEllipse(Brushes.White, new Rectangle(this.Width - - (this.Height - - ) / - ((this.Height - - ) / ) / - , (this.Height - - (this.Height - - ) / ) / + , (this.Height - - ) / , (this.Height - - ) / ));
}
else
{
g.FillEllipse(new SolidBrush(fillColor), new Rectangle( + , + , this.Height - - , this.Height - - ));
g.FillEllipse(Brushes.White, new Rectangle((this.Height - - ) / - ((this.Height - - ) / ) / + , (this.Height - - (this.Height - - ) / ) / + , (this.Height - - ) / , (this.Height - - ) / ));
}
}
} } public enum SwitchType
{
/// <summary>
/// 椭圆
/// </summary>
Ellipse,
/// <summary>
/// 四边形
/// </summary>
Quadrilateral,
/// <summary>
/// 横线
/// </summary>
Line
}
}
namespace HZH_Controls.Controls
{
partial class UCSwitch
{
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.IContainer components = null; /// <summary>
/// 清理所有正在使用的资源。
/// </summary>
/// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
} #region 组件设计器生成的代码 /// <summary>
/// 设计器支持所需的方法 - 不要
/// 使用代码编辑器修改此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.SuspendLayout();
//
// UCSwitch
//
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.None;
this.BackColor = System.Drawing.Color.Transparent;
this.Name = "UCSwitch";
this.Size = new System.Drawing.Size(, );
this.ResumeLayout(false); } #endregion
}
}
用处及效果
最后的话
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