C#实现自定义单选和复选按钮样式

目录

• 实践过程
• 效果
• 代码

实践过程

效果

代码

public partial class GlorifyCheckBox : CheckBox
    {
        public GlorifyCheckBox()
        {
            InitializeComponent();
            FontAspect = getAspect(); //获取当前控件文本的读取方向
        }

        #region 变量

        private bool FontAspect = false; //判断字体的方向
        private int Measurement = 255; //设置渐变的初始值
        LinearGradientBrush Periphery_br; //外圆的颜色
        LinearGradientBrush Central_br; //移入控件时中圆的颜色
        LinearGradientBrush NoCentral_br; //无操作时中圆的颜色

        #endregion

        #region 添加属性

        public enum StyleSort
        {
            Null = 0, //无
            Integer = 1, //整数
            Decimal = 2, //小数
        }

        private Color TPeripheryColor = Color.DarkBlue;

        [Browsable(true), Category("设置填充颜色"), Description("外圆的颜色")] //在“属性”窗口中显示DataStyle属性
        public Color PeripheryColor
        {
            get { return TPeripheryColor; }
            set
            {
                TPeripheryColor = value;
                this.Invalidate();
            }
        }

        private Color TCentralColor = Color.CornflowerBlue;

        [Browsable(true), Category("设置填充颜色"), Description("移入控件时中圆的颜色")] //在“属性”窗口中显示DataStyle属性
        public Color CentralColor
        {
            get { return TCentralColor; }
            set
            {
                TCentralColor = value;
                this.Invalidate();
            }
        }

        private Color TNoCentralColor = Color.PowderBlue;

        [Browsable(true), Category("设置填充颜色"), Description("无操作时中圆的颜色")] //在“属性”窗口中显示DataStyle属性
        public Color NoCentralColor
        {
            get { return TNoCentralColor; }
            set
            {
                TNoCentralColor = value;
                this.Invalidate();
            }
        }

        private Color TStippleColor = Color.DarkBlue;

        [Browsable(true), Category("设置填充颜色"), Description("选中后内圆的颜色")] //在“属性”窗口中显示DataStyle属性
        public Color StippleColor
        {
            get { return TStippleColor; }
            set
            {
                TStippleColor = value;
                this.Invalidate();
            }
        }

        #endregion

        #region 事件

        /// <summary>
        /// 控件在需要重绘时触发
        /// </summary>
        protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)
        {
            e.Graphics.FillRectangle(SystemBrushes.Control, e.ClipRectangle); //填充矩形
            e.Graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias; //清除锯齿
            //获取左面图标的区域
            Rectangle boxrect = new Rectangle(e.ClipRectangle.X, e.ClipRectangle.Y,
                SystemInformation.SmallIconSize.Width, e.ClipRectangle.Height);
            //获取绘制的文本的区域
            Rectangle strrect = new Rectangle(e.ClipRectangle.X + SystemInformation.SmallIconSize.Width,
                e.ClipRectangle.Y, e.ClipRectangle.Width + 5 - SystemInformation.SmallIconSize.Width,
                e.ClipRectangle.Height);
            if (FontAspect) //判断字体的读取方式
            {
                boxrect.X = e.ClipRectangle.X + e.ClipRectangle.Width - SystemInformation.SmallIconSize.Width; //设置椭圆的位置
                strrect.X = e.ClipRectangle.X; //设置字体位置
            }

            Point MousePos = this.PointToClient(Control.MousePosition); //获取鼠标的位置
            bool Above = e.ClipRectangle.Contains(MousePos); //获取鼠标是否在当前控件上

            DrawBox(e.Graphics, boxrect, Above); //绘制单选图案
            DrawText(e.Graphics, strrect); //绘制文字
            if (!Enabled)
                e.Graphics.FillRectangle(new SolidBrush(Color.FromArgb(127, SystemColors.Control)), e.ClipRectangle);
        }

        /// <summary>
        /// 鼠标移入控件的可见区域时触发
        /// </summary>
        protected override void OnMouseEnter(System.EventArgs e)
        {
            base.OnMouseEnter(e);
            this.Invalidate();
        }

        /// <summary>
        /// 鼠标移出控件的可见区域时触发
        /// </summary>
        protected override void OnMouseLeave(System.EventArgs e)
        {
            base.OnMouseLeave(e);
            this.Invalidate();
        }

        /// <summary>
        /// RightToLeft属性值更改时发生
        /// </summary>
        protected override void OnRightToLeftChanged(System.EventArgs e)
        {
            base.OnRightToLeftChanged(e);
            FontAspect = getAspect();
            this.Invalidate();
        }

        #endregion

        #region 方法

        /// <summary>
        /// 绘制单选控件的图案
        /// </summary>
        /// <param g="Graphics">封装一个绘图的类对象</param>
        /// <param rect="Rectangle">单选图案的绘制区域</param>
        /// <param Above="bool">断判鼠标是否在控件上方</param>
        private void DrawBox(Graphics g, Rectangle rect, bool Above)
        {
            //设置外椭圆的渐变色
            int opacity = Measurement;
            Periphery_br = new LinearGradientBrush(rect, Color.FromArgb(opacity / 2, PeripheryColor),
                Color.FromArgb(opacity, PeripheryColor), LinearGradientMode.ForwardDiagonal);
            //设置中间椭圆形选中时的渐变色
            opacity = (int) (.4f * opacity + .5f);
            Central_br = new LinearGradientBrush(rect, Color.FromArgb(opacity / 10, CentralColor),
                Color.FromArgb(opacity, CentralColor), LinearGradientMode.ForwardDiagonal);
            //设置中间椭圆形无操作时的渐变色
            opacity = (int) (.4f * opacity + .5f);
            NoCentral_br = new LinearGradientBrush(rect, Color.FromArgb(opacity / 10, NoCentralColor),
                Color.FromArgb(opacity, NoCentralColor), LinearGradientMode.ForwardDiagonal);
            int size = this.Font.Height; //获取字体的高度
            //获取外椭圆的区域
            Rectangle box = new Rectangle(rect.X + ((rect.Width - size) / 2), rect.Y + ((rect.Height - size) / 2),
                size - 2, size - 2);
            Rectangle glyph = new Rectangle(box.X + 3, box.Y + 3, box.Width - 6, box.Height - 6); //设置内圆的绘制区域
            Rectangle right = new Rectangle(box.X, box.Y - 1, box.Width + 2, box.Height + 2);
            g.FillEllipse(new SolidBrush(SystemColors.Window), box); //以白色填充单选图案 

            if (this.CheckState != CheckState.Unchecked) //如果是选中状态
            {
                base.ForeColor = Color.DarkBlue;
                ControlPaint.DrawMenuGlyph(g, right, MenuGlyph.Checkmark, this.StippleColor, Color.White); //绘制对号
                g.DrawRectangle(new Pen(new SolidBrush(SystemColors.Control), (float) (3)), box); //绘制外椭圆
            }

            if (this.CheckState == CheckState.Indeterminate)
                g.FillRectangle(new SolidBrush(Color.FromArgb(127, SystemColors.Control)), right);

            if (Above && this.Enabled) //如果鼠标移入该控件
            {
                g.DrawRectangle(new Pen(Central_br, 2),
                    new Rectangle(box.X + 2, box.Y + 2, box.Width - 4, box.Height - 4)); //绘制中心椭圆
            }
            else
            {
                g.DrawRectangle(new Pen(NoCentral_br, 2),
                    new Rectangle(box.X + 2, box.Y + 2, box.Width - 4, box.Height - 4)); //绘制中心椭圆
            }

            g.DrawRectangle(new Pen(Periphery_br, (float) (1.5)), box); //绘制外椭圆
        }

        /// <summary>
        /// 绘制文本
        /// </summary>
        /// <param g="Graphics">封装一个绘图的类对象</param>
        /// <param rect="Rectangle">绘制文本的区域</param>
        private void DrawText(Graphics g, Rectangle rect)
        {
            StringFormat tem_StringF = new StringFormat();
            tem_StringF.Alignment = StringAlignment.Near;
            tem_StringF.LineAlignment = StringAlignment.Center; //文本居中对齐
            if (FontAspect)
                tem_StringF.FormatFlags = StringFormatFlags.DirectionRightToLeft; //按从左到右的顺序显示文本
            //g.DrawString(this.Text, this.Font, SystemBrushes.ControlText, rect, tem_StringF);//绘制文本
            if (!FontAspect)
                g.DrawString(this.Text, this.Font, SystemBrushes.ControlText, rect, tem_StringF); //绘制文本
            else
            {
                rect.X = rect.X - SystemInformation.SmallIconSize.Width / 2 + 2;
                g.DrawString(this.Text, this.Font, SystemBrushes.ControlText, rect, tem_StringF);
            }
        }

        /// <summary>
        /// 获取文本的读取方向
        /// </summary>
        /// <return>布尔型</return>
        private bool getAspect()
        {
            bool tem_Aspect = SystemInformation.RightAlignedMenus;
            if (this.RightToLeft == RightToLeft.Yes) //从右到左进行读取
                tem_Aspect = true;
            if (this.RightToLeft == RightToLeft.No) //从左到右进行读取
                tem_Aspect = false;
            return tem_Aspect;
        }

        #endregion
    }

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