c#自定义控件——ImageButton---饼形图的按钮

来自：http://blog.csdn.net/agoodchild/article/details/6698394

 

c#自定义控件——ImageButton

 这段时间做了个小项目，需要用到一个背景透明，只显示图片和文字的Button，没有找到现成的，所以自己写了一个，主要就是重写OnPaint事件

下面是这个Button的代码,

其中，是否有选中状态是指按钮按下之后是否有类似于菜单的那中选中状态，同级别之间是否互斥是指当同一空间内有多个Button时，点击某一个是否取消其他按钮的选中状态

/***********************Created By Liushufeng 2011-08-18********************/using System;using System.Collections.Generic;using System.Text;using System.Windows.Forms;using System.Drawing;using System.ComponentModel;using System.Drawing.Drawing2D;namespace OurControls{    public class OurButton : Label    {        private bool isMouseIn;        private bool isMouseDown;        private bool withBorder = true;        private bool roundCorner = true;        private bool withArrow = true;        private int intervalBetweenTextAndBorder = 2;        private int intervalBetweenTextAndImage = 2;        private Color colorMouseIn = Color.White;        private Color colorMouseDown = Color.White;        private bool haveCheckState = true;        private bool exclusion = true;        private eTextPosition textPosition = eTextPosition.Bottom;        [CategoryAttribute("文字位置"), Browsable(true), DisplayName("文字位置"), DescriptionAttribute("文字位置")]        public eTextPosition TextPosition        {            get { return textPosition; }            set            {                textPosition = value;                this.Invalidate();            }        }        [CategoryAttribute("绘制边框"), Browsable(true), DisplayName("绘制边框"), DescriptionAttribute("绘制边框")]        public bool WithBorder        {            get { return withBorder; }            set            {                withBorder = value;                this.Invalidate();            }        }        [CategoryAttribute("圆角"), Browsable(true), DisplayName("圆角"), DescriptionAttribute("圆角")]        public bool RoundCorner        {            get { return roundCorner; }            set            {                roundCorner = value;                this.Invalidate();            }        }        [CategoryAttribute("带向下的剪头"), Browsable(true), DisplayName("带向下的剪头"), DescriptionAttribute("带向下的剪头")]        public bool WithArrow        {            get { return withArrow; }            set            {                withArrow = value;                this.Invalidate();            }        }        [CategoryAttribute("文字与图像之间的间隔"), Browsable(true), DisplayName("文字与图像之间的间隔"), DescriptionAttribute("文字与图像之间的间隔")]        public int IntervalBetweenTextAndImage        {            get { return intervalBetweenTextAndImage; }            set            {                intervalBetweenTextAndImage = value;                this.Invalidate();            }        }        [CategoryAttribute("文字与边框之间的间隔"), Browsable(true), DisplayName("文字与边框之间的间隔"), DescriptionAttribute("文字与边框之间的间隔")]        public int IntervalBetweenTextAndBorder        {            get { return intervalBetweenTextAndBorder; }            set            {                intervalBetweenTextAndBorder = value;                this.Invalidate();            }        }        [CategoryAttribute("鼠标悬停时的背景色"), Browsable(true), DisplayName("鼠标悬停时的背景色"), DescriptionAttribute("鼠标悬停时的背景色")]        public Color  ColorMouseIn        {            get { return colorMouseIn; }            set { colorMouseIn = value; }        }        [CategoryAttribute("选中状态的背景色"), Browsable(true), DisplayName("选中状态的背景色"), DescriptionAttribute("选中状态的背景色")]        public Color ColorMouseDown        {            get { return colorMouseDown; }            set { colorMouseDown = value; }        }        [CategoryAttribute("是否有选中状态"), Browsable(true), DisplayName("是否有选中状态"), DescriptionAttribute("是否有选中状态")]        public bool CheckState        {            get { return haveCheckState; }            set { haveCheckState = value; }        }        [CategoryAttribute("同级别之间是否互斥"), Browsable(true), DisplayName("同级别之间是否互斥"), DescriptionAttribute("同级别之间是否互斥")]        public bool Exclusion        {            get { return exclusion; }            set { exclusion= value; }        }        protected override void OnClick(EventArgs e)        {            base.OnClick(e);            if (CheckState)            {                isMouseDown = true;                if (exclusion)                {                    if (this.Parent != null)                    {                        int ctlCount = this.Parent.Controls.Count;                        for (int i = 0; i < ctlCount; i++)                        {                            object o = this.Parent.Controls[i];                            if (o.GetType() == this.GetType())                            {                                OurButton button = this.Parent.Controls[i] as OurButton;                                if (button != null)                                {                                    if (button != this)                                    {                                        button.PopUp();                                    }                                }                            }                        }                    }                }            }        }        private void PopUp()        {            this.isMouseDown = false;            this.Invalidate();        }        public override bool AutoSize        {            get            {                return false;            }            set            {                base.AutoSize = value;            }        }        protected override void OnPaint(PaintEventArgs e)        {            Graphics g = e.Graphics;            g.SmoothingMode = SmoothingMode.HighQuality;            float imagex = 0;            float imagey = 0;            float tx = 0; float ty = 0;            float txtHeight = 0;            float txtWidth = 0;            #region 绘制背景            if (isMouseIn || isMouseDown )            {                Color c = colorMouseIn;                if (isMouseDown)                {                    c = colorMouseDown;                }                int arrowHeight = 7;                if (!withArrow)                    arrowHeight = 0;                Rectangle rect = new Rectangle(0, 0, this.Width, this.Height - arrowHeight );                Rectangle rect2 = new Rectangle(0, 0, this.Width - 1, this.Height - arrowHeight);                GraphicsPath path1 = null;                GraphicsPath path2 = null;                if (roundCorner)                {                    if (withArrow)                    {                        path1 = GetRoundRectangleWithArrow(rect, 10);                        path2 = GetRoundRectangleWithArrow(rect2, 10);                    }                    else                    {                        path1 = GetRoundRectangle(rect, 10);                        path2 = GetRoundRectangle(rect2, 10);                    }                    g.FillPath(new SolidBrush(c), path1);                    if (withBorder)                        g.DrawPath(new Pen(Color.Silver, 2), path2);                }                else                {                    g.FillRectangle(new SolidBrush(c), rect);                    g.DrawRectangle(new Pen(c, 2), rect2);                }            }            #endregion            #region 绘制文本            if (this.Text != string.Empty)            {                SizeF sizeoftext = g.MeasureString(this.Text, Font);                txtHeight = (float)(sizeoftext.Height);                txtWidth = (float)(sizeoftext.Width);                switch (TextPosition)                {                    case eTextPosition.Top:                        tx = (float)((this.Width - sizeoftext.Width) / 2.0);                        ty = intervalBetweenTextAndBorder;                        break;                    case eTextPosition.Left:                        ty = (float)((this.Height - sizeoftext.Height) / 2.0);                        tx = intervalBetweenTextAndBorder;                        break;                    case eTextPosition.Right:                        if (Image == null)                            tx = this.Width - sizeoftext.Width - intervalBetweenTextAndBorder;                        else                            tx = intervalBetweenTextAndBorder + Image.Width + intervalBetweenTextAndImage;                        ty = (float)((this.Height - sizeoftext.Height) / 2.0);                        break;                    case eTextPosition.Bottom:                        if (Image != null)                            ty = intervalBetweenTextAndBorder + intervalBetweenTextAndImage + Image.Height;                        else                            ty = IntervalBetweenTextAndBorder;                        tx = (float)((this.Width - txtWidth) / 2.0);                        break;                }                g.DrawString(this.Text, Font, new SolidBrush(ForeColor), tx, ty);            }            #endregion            #region 绘制图片            if (Image != null)            {                switch (TextPosition)                {                    case eTextPosition.Top:                        imagex = (float)((this.Width - Image.Width) / 2.0);                        imagey = ty + txtHeight + intervalBetweenTextAndImage;                        break;                    case eTextPosition.Left:                        imagex = tx + txtWidth + intervalBetweenTextAndImage;                        imagey = (float)((this.Height - Image.Height) / 2.0);                        break;                    case eTextPosition.Right:                        imagex = IntervalBetweenTextAndBorder;                        imagey = (float)((this.Height - Image.Height) / 2.0);                        break;                    case eTextPosition.Bottom:                        imagey = intervalBetweenTextAndBorder;                        imagex = (float)((this.Width - Image.Width) / 2.0);                        break;                }                g.DrawImage(Image, imagex, imagey);            }            #endregion        }        protected override void OnMouseEnter(EventArgs e)        {            base.OnMouseEnter(e);            isMouseIn = true;            this.Invalidate();        }        protected override void OnMouseLeave(EventArgs e)        {            base.OnMouseLeave(e);            isMouseIn = false;            this.Invalidate();        }        private GraphicsPath GetRoundRectangle(Rectangle rectangle, int r)        {            int l = 2 * r;            // 把圆角矩形分成八段直线、弧的组合，依次加到路径中              GraphicsPath gp = new GraphicsPath();            gp.AddLine(new Point(rectangle.X + r, rectangle.Y), new Point(rectangle.Right - r, rectangle.Y));            gp.AddArc(new Rectangle(rectangle.Right - l, rectangle.Y, l, l), 270F, 90F);            gp.AddLine(new Point(rectangle.Right, rectangle.Y + r), new Point(rectangle.Right, rectangle.Bottom - r));            gp.AddArc(new Rectangle(rectangle.Right - l, rectangle.Bottom - l, l, l), 0F, 90F);            gp.AddLine(new Point(rectangle.Right - r, rectangle.Bottom), new Point(rectangle.X + r, rectangle.Bottom));            gp.AddArc(new Rectangle(rectangle.X, rectangle.Bottom - l, l, l), 90F, 90F);            gp.AddLine(new Point(rectangle.X, rectangle.Bottom - r), new Point(rectangle.X, rectangle.Y + r));            gp.AddArc(new Rectangle(rectangle.X, rectangle.Y, l, l), 180F, 90F);            return gp;        }        private GraphicsPath GetRoundRectangleWithArrow(Rectangle rectangle, int r)        {            int l = 2 * r;            // 把圆角矩形分成八段直线、弧的组合，依次加到路径中              GraphicsPath gp = new GraphicsPath();            gp.AddLine(new Point(rectangle.X + r, rectangle.Y), new Point(rectangle.Right - r, rectangle.Y));            gp.AddArc(new Rectangle(rectangle.Right - l, rectangle.Y, l, l), 270F, 90F);            gp.AddLine(new Point(rectangle.Right, rectangle.Y + r), new Point(rectangle.Right, rectangle.Bottom - r));            gp.AddArc(new Rectangle(rectangle.Right - l, rectangle.Bottom - l, l, l), 0F, 90F);            int miniwidth = 5;            int miniheight = 6;            //这是下面的一条线，把它分成四份            //            gp.AddLine(new Point(rectangle.Right - r, rectangle.Bottom), );            //1            gp.AddLine(new Point(rectangle.Right - r, rectangle.Bottom), new Point(rectangle.Width / 2 + miniwidth, rectangle.Bottom));            //2            gp.AddLine(new Point(rectangle.Width / 2 + miniwidth, rectangle.Bottom), new Point(rectangle.Width / 2, rectangle.Bottom + miniheight));            //3            gp.AddLine(new Point(rectangle.Width / 2, rectangle.Bottom + miniheight), new Point(rectangle.Width / 2 - miniwidth, rectangle.Bottom));            //4            gp.AddLine(new Point(rectangle.Width / 2 - miniwidth, rectangle.Bottom), new Point(rectangle.X + r, rectangle.Bottom));            gp.AddArc(new Rectangle(rectangle.X, rectangle.Bottom - l, l, l), 90F, 90F);            gp.AddLine(new Point(rectangle.X, rectangle.Bottom - r), new Point(rectangle.X, rectangle.Y + r));            gp.AddArc(new Rectangle(rectangle.X, rectangle.Y, l, l), 180F, 90F);            return gp;        }    }    public enum eTextPosition    {        Top,        Left,        Right,        Bottom,    }}

下面是按钮的效果：