using System;
using System.ComponentModel;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;
namespace WinCustControls
{
[DefaultEvent("CheckedChanged")]
public partial class USwitch : UserControl
{
public USwitch()
{
InitializeComponent();
SetStyle(ControlStyles.Selectable, true);//控件可以接收焦点
SetStyle(ControlStyles.AllPaintingInWmPaint, true);//忽略窗口消息，减少闪烁
SetStyle(ControlStyles.OptimizedDoubleBuffer, true);//绘制到缓冲区，减少闪烁
SetStyle(ControlStyles.UserPaint, true);//控件由其自身而不是操作系统绘制
SetStyle(ControlStyles.ResizeRedraw, true);//控件调整其大小时重绘
SetStyle(ControlStyles.SupportsTransparentBackColor, true);//支持透明背景
MouseDown += USwitch_MouseDown;
}
///
/// 引发CheckedChanged事件
///
///
///
private void USwitch_MouseDown(object sender, MouseEventArgs e)
{
CheckedChanged?.Invoke(this, new EventArgs());
}
[Description("开关状态值改变时触发")]
public event EventHandler CheckedChanged;
private Color trueColor = Color.DarkTurquoise;
[DefaultValue(typeof(Color), "DarkTurquoise"), Description("状态Checked为True时的背景色")]
public Color TrueColor
{
get { return trueColor; }
set
{
trueColor = value;
Invalidate();
}
}
private Color falseColor = Color.Gray;
[DefaultValue(typeof(Color), "Gray"), Description("状态Checked为False时的背景色")]
public Color FalseColor
{
get { return falseColor; }
set
{
falseColor = value;
Invalidate();
}
}
private bool mChecked = false;
[DefaultValue(typeof(bool), "False"), Description("开关状态值")]
public bool Checked
{
get { return mChecked; }
set
{
mChecked = value;
Invalidate();
}
}
private string[] texts;
[Description("开关两种状态的文本，必须是长度为2的字符串数组")]
public string[] Texts
{
get { return texts; }
set
{
texts = value;
Invalidate();
}
}
private SwitchType switchType = SwitchType.Ellipse;
[DefaultValue(typeof(SwitchType), "Ellipse"), Description("开关样式")]
public SwitchType SwitchType
{
get { return switchType; }
set
{
switchType = value;
Invalidate();
}
}
public override Font Font
{
get => base.Font;
set
{
base.Font = value;
Invalidate();
}
}
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
Graphics g = e.Graphics;
g.SmoothingMode = SmoothingMode.AntiAlias;
//背景填充色
var fillColor = mChecked ? trueColor : falseColor;
//外观形状的路径
GraphicsPath path = new GraphicsPath();
if (switchType == SwitchType.Ellipse)
{
//上边直线
path.AddLine(Height / 2, 1, Width - Height / 2, 1);
//右边半圆弧
path.AddArc(Width - Height - 1, 1, Height - 2, Height - 2, -90, 180);
//下边直线 右----左
path.AddLine(Width - Height / 2, Height - 1, Height / 2, Height - 1);
//左边半圆弧
path.AddArc(1, 1, Height - 2, Height - 2, 90, 180);
g.FillPath(new SolidBrush(fillColor), path);
//开关的文本
string strText = "";
if (texts != null && texts.Length == 2)
{
if (mChecked)
strText = texts[0];
else
strText = texts[1];
}
if (mChecked)
{
//填充右边正圆 直径 Height-2-4
g.FillEllipse(Brushes.White, new Rectangle(Width - Height - 1 + 2, 1 + 2, Height - 2 - 4, Height - 2 - 4));
if (string.IsNullOrEmpty(strText))//没有文本
{
//左边就画一个小圆，边框为白色 直径 ：右边圆的一半
g.DrawEllipse(new Pen(Color.White, 2), new Rectangle((Height - 2 - 4) / 2 - ((Height - 2 - 4) / 4), (Height - 2 - (Height - 2 - 4) / 2) / 2 + 1, (Height - 2 - 4) / 2, (Height - 2 - 4) / 2));
}
else
{
//获取文本尺寸
SizeF sizeF = g.MeasureString(strText.Replace(" ", "A"), Font);
//计算文本绘制的位置的矩形的左上角y坐标值
int textY = (Height - (int)sizeF.Height) / 2 + 2;
//x坐标 1/2半径处
g.DrawString(strText, Font, Brushes.White, new Point((Height - 2 - 4) / 2, textY));
}
}
else //Checked 为False
{
//填充左边正圆
g.FillEllipse(Brushes.White, new Rectangle(1 + 2, 1 + 2, this.Height - 2 - 4, this.Height - 2 - 4));
if (string.IsNullOrEmpty(strText))//没有文本
{
//右边就画一个小圆，边框为白色 直径 ：左边圆的一半
g.DrawEllipse(new Pen(Color.White, 2), new Rectangle(this.Width - 2 - (this.Height - 2 - 4) / 2 - ((this.Height - 2 - 4) / 2) / 2, (this.Height - 2 - (this.Height - 2 - 4) / 2) / 2 + 1, (this.Height - 2 - 4) / 2, (this.Height - 2 - 4) / 2));
}
else
{
//获取文本尺寸
SizeF sizeF = g.MeasureString(strText.Replace(" ", "A"), Font);
//计算文本绘制的位置的矩形的左上角y坐标值
int textY = (Height - (int)sizeF.Height) / 2 + 2;
//x坐标 1/2半径
g.DrawString(strText, Font, Brushes.White, new Point(this.Width - 2 - this.Height / 2 - ((int)sizeF.Width) + 4, textY));
}
}
}
else if (switchType == SwitchType.Quadriateral)//四边形
{
//圆角正方形边长
int intRadius = 5;
//左上角圆弧
path.AddArc(0, 0, intRadius, intRadius, 180f, 90f);
//右上角圆弧
path.AddArc(this.Width - intRadius - 1, 0, intRadius, intRadius, 270f, 90f);
//右下角圆弧
path.AddArc(this.Width - intRadius - 1, this.Height - intRadius - 1, intRadius, intRadius, 0f, 90f);
//左下角圆弧
path.AddArc(0, this.Height - intRadius - 1, intRadius, intRadius, 90f, 90f);
//填充圆角矩形
g.FillPath(new SolidBrush(fillColor), path);
//获取文本
string strText = string.Empty;
if (texts != null && texts.Length == 2)
{
if (mChecked)
{
strText = texts[0];
}
else
{
strText = texts[1];
}
}
if (mChecked)
{
//右边正方形圆角
GraphicsPath path2 = new GraphicsPath();
//左上角圆弧
path2.AddArc(this.Width - this.Height - 1 + 2, 1 + 2, intRadius, intRadius, 180f, 90f);
//右上角圆弧
path2.AddArc(this.Width - 1 - 2 - intRadius, 1 + 2, intRadius, intRadius, 270f, 90f);
//右下角圆弧
path2.AddArc(this.Width - 1 - 2 - intRadius, this.Height - 2 - intRadius - 1, intRadius, intRadius, 0f, 90f);
//右下角圆弧
path2.AddArc(this.Width - this.Height - 1 + 2, this.Height - 2 - intRadius - 1, intRadius, intRadius, 90f, 90f);
//填充圆角正方形
g.FillPath(Brushes.White, path2);
if (string.IsNullOrEmpty(strText))
{
//左边画个小圆
//小圆所在矩形左上角坐标 ：x 1/2边长-1/2小圆半径
//y: 1/2边长-1/2小圆半径+1
//半径：1/2 正方形边长
g.DrawEllipse(new Pen(Color.White, 2), new Rectangle((this.Height - 2 - 4) / 2 - ((this.Height - 2 - 4) / 2) / 2, (this.Height - 2 - (this.Height - 2 - 4) / 2) / 2 + 1, (this.Height - 2 - 4) / 2, (this.Height - 2 - 4) / 2));
}
else
{
//画文本
System.Drawing.SizeF sizeF = g.MeasureString(strText.Replace(" ", "A"), Font);
//y坐标
int intTextY = (this.Height - (int)sizeF.Height) / 2 + 2;
//x:1/2边长处
g.DrawString(strText, Font, Brushes.White, new Point((this.Height - 2 - 4) / 2, intTextY));
}
}
else//画关的外观
{
//圆角正方形路径 左边
GraphicsPath path2 = new GraphicsPath();
path2.AddArc(1 + 2, 1 + 2, intRadius, intRadius, 180f, 90f);
path2.AddArc(this.Height - 2 - intRadius, 1 + 2, intRadius, intRadius, 270f, 90f);
path2.AddArc(this.Height - 2 - intRadius, this.Height - 2 - intRadius - 1, intRadius, intRadius, 0f, 90f);
path2.AddArc(1 + 2, this.Height - 2 - intRadius - 1, intRadius, intRadius, 90f, 90f);
//填充圆角正方形
g.FillPath(Brushes.White, path2);
if (string.IsNullOrEmpty(strText))
{
//无文本，画右边小圆
//小圆所在矩形左上角坐标 ：x 宽度-2-1/2边长-1/2小圆半径
//y: 1/2边长-1/2小圆半径+1
//半径：1/2 正方形边长
g.DrawEllipse(new Pen(Color.White, 2), new Rectangle(this.Width - 2 - (this.Height - 2 - 4) / 2 - ((this.Height - 2 - 4) / 2) / 2, (this.Height - 2 - (this.Height - 2 - 4) / 2) / 2 + 1, (this.Height - 2 - 4) / 2, (this.Height - 2 - 4) / 2));
}
else
{
//画文本
System.Drawing.SizeF sizeF = g.MeasureString(strText.Replace(" ", "A"), Font);
//y坐标
int intTextY = (this.Height - (int)sizeF.Height) / 2 + 2;
//x坐标 宽-2-1/2正方形边长-文字宽度+4
g.DrawString(strText, Font, Brushes.White, new Point(this.Width - 2 - (this.Height - 2 - 4) / 2 - (int)sizeF.Width + 4, intTextY));
}
}
}
else //线型
{
//线高
int intLineHeight = (this.Height - 2 - 4) / 2;
// 上边直线 点 ：高度,(高度-线高)/2 点：宽-高/2, (高度-线高)/2
path.AddLine(new Point(this.Height / 2, (this.Height - intLineHeight) / 2), new Point(this.Width - this.Height / 2, (this.Height - intLineHeight) / 2));
//右边半圆弧 半径是 1/2线高
path.AddArc(new Rectangle(this.Width - this.Height / 2 - intLineHeight - 1, (this.Height - intLineHeight) / 2, intLineHeight, intLineHeight), -90, 180);
//下边直线
path.AddLine(new Point(this.Width - this.Height / 2, (this.Height - intLineHeight) / 2 + intLineHeight), new Point(this.Width - this.Height / 2, (this.Height - intLineHeight) / 2 + intLineHeight));
//左边半圆弧
path.AddArc(new Rectangle(this.Height / 2, (this.Height - intLineHeight) / 2, intLineHeight, intLineHeight), 90, 180);
//填充线
g.FillPath(new SolidBrush(fillColor), path);
if (mChecked)//绘制开时的外观
{
//填充右边外圆
g.FillEllipse(new SolidBrush(fillColor), new Rectangle(this.Width - this.Height - 1 + 2, 1 + 2, this.Height - 2 - 4, this.Height - 2 - 4));
//填充右边内圆
//x坐标：宽-2-1/2外圆半径-1/2内圆半径-4 y坐标：高-2-1/2内圆半径+1
//内圆直径：(this.Height - 2 - 4) / 2 (高-2-4)/2
g.FillEllipse(Brushes.White, new Rectangle(this.Width - 2 - (this.Height - 2 - 4) / 2 - ((this.Height - 2 - 4) / 2) / 2 - 4, (this.Height - 2 - (this.Height - 2 - 4) / 2) / 2 + 1, (this.Height - 2 - 4) / 2, (this.Height - 2 - 4) / 2));
}
else //关时的外观
{
//填充左边外圆
g.FillEllipse(new SolidBrush(fillColor), new Rectangle(1 + 2, 1 + 2, this.Height - 2 - 4, this.Height - 2 - 4));
//填充左贺内圆
//x坐标：1/2外圆半径-1/2内圆半径+4 y坐标：1/2外圆半径-1/2内圆半径+1
//内圆直径：(this.Height - 2 - 4) / 2 (高-2-4)/2
g.FillEllipse(Brushes.White, new Rectangle((this.Height - 2 - 4) / 2 - ((this.Height - 2 - 4) / 2) / 2 + 4, (this.Height - 2 - (this.Height - 2 - 4) / 2) / 2 + 1, (this.Height - 2 - 4) / 2, (this.Height - 2 - 4) / 2));
}
}
}
}
public enum SwitchType
{
//圆形
Ellipse,
//四边形
Quadriateral,
//线形
Line
}
}