/// <summary>/// 表示 Windows 的按钮控/// </summary>[Description("表示 Windows 的按钮控件"), DefaultEvent("Click"), ToolboxBitmap(typeof (System.Windows.Forms.Button))]public class Button : Control{public Button(){SetStyle(ControlStyles.AllPaintingInWmPaint, true);SetStyle(ControlStyles.DoubleBuffer, true);SetStyle(ControlStyles.ResizeRedraw, true);SetStyle(ControlStyles.Selectable, true);SetStyle(ControlStyles.SupportsTransparentBackColor, true);SetStyle(ControlStyles.UserPaint, true);_fadeIn.Interval = 30;_fadeOut.Interval = 30;_fadeIn.Tick += FadeIn_Tick;_fadeOut.Tick += FadeOut_Tick;}/// <summary>/// 淡出/// </summary>private void FadeOut_Tick(object sender, EventArgs e){if (ButtonStyle == Style.Flat){_glowAlpha = 0;}if (_glowAlpha - 30 <= 0){_glowAlpha = 0;_fadeOut.Stop();}else{_glowAlpha -= 30;}Invalidate();}/// <summary>/// 淡入/// </summary>private void FadeIn_Tick(object sender, EventArgs e){if (ButtonStyle == Style.Flat){_glowAlpha = 0;}if (_glowAlpha + 30 >= 255){_glowAlpha = 255;_fadeIn.Stop();}else{_glowAlpha += 30;}Invalidate();}private readonly Color[] _colorArray ={Color.White, Color.FromArgb(172, 168, 153), Color.White,Color.FromArgb(236, 233, 216)};private float _radius = 3;private Style _mButtonStyle = Style.Default;private State _mButtonState = State.None;private readonly Timer _fadeIn = new Timer();private readonly Timer _fadeOut = new Timer();private int _glowAlpha;private ContentAlignment _mTextAlign = ContentAlignment.MiddleCenter;private ContentAlignment _mImageAlign = ContentAlignment.BottomCenter;private Size _mImageSize = new Size(24, 24);private Image _mImage;private Image _backImage;/// <summary>/// 高亮颜色/// </summary>[Category("Appearance"), Description("高亮颜色"), DefaultValue(typeof(Color), "White"), Browsable(true)]public Color LightColor{set{_colorArray[0] = value;Invalidate();}get { return _colorArray[0]; }}/// <summary>/// 底色/// </summary>[Category("Appearance"), Description("底色"), DefaultValue(typeof(Color), "172, 168, 153"), Browsable(true)]public Color PrimaryColor{set{_colorArray[1] = value;Invalidate();}get { return _colorArray[1]; }}/// <summary>/// 亮点颜色/// </summary>[Category("Appearance"), Description("亮点颜色"), DefaultValue(typeof(Color), "White"), Browsable(true)]public Color GlowColor{set{_colorArray[2] = value;Invalidate();}get { return _colorArray[2]; }}/// <summary>/// 基本色/// </summary>[Category("Appearance"), Description("基本色"), DefaultValue(typeof(Color), "236, 233, 216"), Browsable(true)]public Color BaseColor{set{_colorArray[3] = value;Invalidate();}get { return _colorArray[3]; }}/// <summary>/// 角的度数/// </summary>[Category("Appearance"), Description("角的度数"), DefaultValue(typeof (float), "8"), Browsable(true)]public float CornerRadius{set{_radius = value;Invalidate();}get { return _radius; }}/// <summary>/// 角的度数/// </summary>[Category("Appearance"), Description("角的度数"), DefaultValue(typeof (Style), "Default"), Browsable(true)]public Style ButtonStyle{get { return _mButtonStyle; }set{_mButtonStyle = value;Invalidate();}}/// <summary>/// 按钮文本的对其方式/// </summary>[Category("Text"), Description("按钮文本的对其方式"), DefaultValue(typeof (Style), "MiddleCenter"), Browsable(true)]public ContentAlignment TextAlign{get { return _mTextAlign; }set{_mTextAlign = value;Invalidate();}}/// <summary>/// 图片的对齐方式/// </summary>[Category("图像"), Description("图片的对齐方式"), DefaultValue(typeof (ContentAlignment), "MiddleLeft"),Browsable(true)]public ContentAlignment ImageAlign{set{_mImageAlign = value;Invalidate();}get { return _mImageAlign; }}/// <summary>/// 图片的高度和宽度/// </summary>[Category("图像"), Description("图片的高度和宽度"), DefaultValue(typeof(ContentAlignment), "24,24"), Browsable(true)]public Size ImageSize{set{_mImageSize = value;Invalidate();}get { return _mImageSize; }}/// <summary>/// 图片/// </summary>[Category("图像"), Description("图片"), DefaultValue(null), Browsable(true)]public Image Image{set{_mImage = value;Invalidate();}get { return _mImage; }}[Category("Appearance"), Description("背景图"), DefaultValue(null), Browsable(true)]public Image BackImage{set{_backImage = value;Invalidate();}get { return _backImage; }}/// <summary>/// 获取绘制区域路径/// </summary>/// <param name="r">区域</param>/// <param name="r1">角1度数</param>/// <param name="r2">角2度数</param>/// <param name="r3">角3度数</param>/// <param name="r4">角4度数</param>/// <returns></returns>private GraphicsPath RoundRect(RectangleF r, float r1, float r2, float r3, float r4){float x = r.X, y = r.Y, w = r.Width, h = r.Height;var gp = new GraphicsPath();gp.AddBezier(x, y + r1, x, y, x + r1, y, x + r1, y);gp.AddLine(x + r1, y, x + w - r2, y);gp.AddBezier(x + w - r2, y, x + w, y, x + w, y + r2, x + w, y + r2);gp.AddLine(x + w, y + r2, x + w, y + h - r3);gp.AddBezier(x + w, y + h - r3, x + w, y + h, x + w - r3, y + h, x + w - r3, y + h);gp.AddLine(x + w - r3, y + h, x + r4, y + h);gp.AddBezier(x + r4, y + h, x, y + h, x, y + h - r4, x, y + h - r4);gp.AddLine(x, y + h - r4, x, y + r1);return gp;}/// <summary>/// 获取绘制文本的方式/// </summary>/// <returns></returns>private StringFormat StringFormatAlignment(){var sf = new StringFormat();switch (TextAlign){case ContentAlignment.TopLeft:case ContentAlignment.TopCenter:case ContentAlignment.TopRight:sf.LineAlignment = StringAlignment.Near;break;case ContentAlignment.MiddleLeft:case ContentAlignment.MiddleCenter:case ContentAlignment.MiddleRight:sf.LineAlignment = StringAlignment.Center;break;case ContentAlignment.BottomLeft:case ContentAlignment.BottomCenter:case ContentAlignment.BottomRight:sf.LineAlignment = StringAlignment.Far;break;}switch (TextAlign){case ContentAlignment.TopLeft:case ContentAlignment.MiddleLeft:case ContentAlignment.BottomLeft:sf.Alignment = StringAlignment.Near;break;case ContentAlignment.TopCenter:case ContentAlignment.MiddleCenter:case ContentAlignment.BottomCenter:sf.Alignment = StringAlignment.Center;break;case ContentAlignment.TopRight:case ContentAlignment.MiddleRight:case ContentAlignment.BottomRight:sf.Alignment = StringAlignment.Far;break;}return sf;}/// <summary>/// 绘制外部/// </summary>/// <param name="g"></param>private void DrawOuterStroke(Graphics g){if (ButtonStyle == Style.Flat && _mButtonState == State.None){return;}Rectangle r = ClientRectangle;r.Width -= 1;r.Height -= 1;using (GraphicsPath rr = RoundRect(r, CornerRadius, CornerRadius, CornerRadius, CornerRadius)){using (var p = new Pen(PrimaryColor)){g.DrawPath(p, rr);}}}/// <summary>/// 绘制内部/// </summary>/// <param name="g"></param>private void DrawInnerStroke(Graphics g){if (ButtonStyle == Style.Flat && _mButtonState == State.None){return;}Rectangle r = ClientRectangle;r.X++;r.Y++;r.Width -= 3;r.Height -= 3;using (GraphicsPath rr = RoundRect(r, CornerRadius, CornerRadius, CornerRadius, CornerRadius)){using (var p = new Pen(LightColor)){g.DrawPath(p, rr);}}}/// <summary>/// 绘制背景/// </summary>/// <param name="g"></param>private void DrawBackground(Graphics g){if (ButtonStyle == Style.Flat && _mButtonState == State.None){return;}int alpha = (_mButtonState == State.Pressed) ? 204 : 127;Rectangle r = ClientRectangle;r.Width--;r.Height--;using (GraphicsPath rr = RoundRect(r, CornerRadius, CornerRadius, CornerRadius, CornerRadius)){using (var sb = new SolidBrush(BaseColor)){g.FillPath(sb, rr);}SetClip(g);if (BackImage != null){g.DrawImage(BackImage, ClientRectangle);}g.ResetClip();using (var sb = new SolidBrush(Color.FromArgb(alpha, PrimaryColor))){g.FillPath(sb, rr);}}}/// <summary>/// 绘制高亮/// </summary>/// <param name="g"></param>private void DrawHighlight(Graphics g){if (ButtonStyle == Style.Flat && _mButtonState == State.None){return;}int alpha = (_mButtonState == State.Pressed) ? 60 : 150;var rect = new Rectangle(0, 0, Width, Height/2);using (GraphicsPath r = RoundRect(rect, CornerRadius, CornerRadius, 0, 0)){using (var lg = new LinearGradientBrush(r.GetBounds(),Color.FromArgb(alpha, LightColor),Color.FromArgb(alpha/3, LightColor),LinearGradientMode.Vertical)){g.FillPath(lg, r);}}}/// <summary>/// 绘制亮点/// </summary>/// <param name="g"></param>private void DrawGlow(Graphics g){if (_mButtonState == State.Pressed){return;}SetClip(g);using (var glow = new GraphicsPath()){glow.AddEllipse(-5, Height/2 - 10, Width + 11, Height + 11);using (var gl = new PathGradientBrush(glow)){gl.CenterColor = Color.FromArgb(_glowAlpha, GlowColor);gl.SurroundColors = new[] {Color.FromArgb(0, GlowColor)};g.FillPath(gl, glow);}}g.ResetClip();}/// <summary>/// 绘制剪辑区域/// </summary>/// <param name="g"></param>private void SetClip(Graphics g){Rectangle r = ClientRectangle;r.X++;r.Y++;r.Width -= 3;r.Height -= 3;using (GraphicsPath rr = RoundRect(r, CornerRadius, CornerRadius, CornerRadius, CornerRadius)){g.SetClip(rr);}}/// <summary>/// 绘制文本/// </summary>/// <param name="g"></param>private void DrawText(Graphics g){StringFormat sf = StringFormatAlignment();var s = g.MeasureString(Text, Font);var x = (int) ((Width - s.Width - 1)/2);var y = (int) ((Height - s.Height - 1)/3*2);var r = new Rectangle(x, y, (int) s.Width + 1, (int) s.Height + 1);g.DrawString(Text, Font, new SolidBrush(ForeColor), r, sf);}/// <summary>/// 绘制图片/// </summary>/// <param name="g"></param>private void DrawImage(Graphics g){if (Image == null){return;}var r = new Rectangle(8, 8, ImageSize.Width, ImageSize.Height);switch (ImageAlign){case ContentAlignment.TopCenter:r = new Rectangle(Width/2 - ImageSize.Width/2, 8, ImageSize.Width, ImageSize.Height);break;case ContentAlignment.TopRight:r = new Rectangle(Width - 8 - ImageSize.Width, 8, ImageSize.Width, ImageSize.Height);break;case ContentAlignment.MiddleLeft:r = new Rectangle(8, Height/2 - ImageSize.Height/2, ImageSize.Width, ImageSize.Height);break;case ContentAlignment.MiddleCenter:r = new Rectangle(Width/2 - ImageSize.Width/2, Height/2 - ImageSize.Height/2, ImageSize.Width,ImageSize.Height);break;case ContentAlignment.MiddleRight:r = new Rectangle(Width - 8 - ImageSize.Width, Height/2 - ImageSize.Height/2, ImageSize.Width,ImageSize.Height);break;case ContentAlignment.BottomLeft:r = new Rectangle(8, Height - 8 - ImageSize.Height, ImageSize.Width, ImageSize.Height);break;case ContentAlignment.BottomCenter:r = new Rectangle(Width/2 - ImageSize.Width/2, Height - 8 - ImageSize.Height, ImageSize.Width,ImageSize.Height);break;case ContentAlignment.BottomRight:r = new Rectangle(Width - 8 - ImageSize.Width, Height - 8 - ImageSize.Height, ImageSize.Width,ImageSize.Height);break;}g.DrawImage(Image, r);}/// <summary>/// 重绘按钮/// </summary>/// <param name="pevent"></param>protected override void OnPaint(PaintEventArgs pevent){base.OnPaint(pevent);pevent.Graphics.SmoothingMode = SmoothingMode.AntiAlias;pevent.Graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;DrawBackground(pevent.Graphics);DrawHighlight(pevent.Graphics);DrawImage(pevent.Graphics);DrawText(pevent.Graphics);DrawGlow(pevent.Graphics);DrawOuterStroke(pevent.Graphics);DrawInnerStroke(pevent.Graphics);}/// <summary>/// 鼠标移入/// </summary>/// <param name="e"></param>protected override void OnMouseEnter(EventArgs e){_mButtonState = State.Hover;_fadeOut.Stop();_fadeIn.Start();base.OnMouseEnter(e);}/// <summary>/// 鼠标移出/// </summary>/// <param name="e"></param>protected override void OnMouseLeave(EventArgs e){_mButtonState = State.None;if (_mButtonStyle == Style.Flat){_glowAlpha = 0;}_fadeIn.Stop();_fadeOut.Start();base.OnMouseLeave(e);}/// <summary>/// 鼠标按下/// </summary>/// <param name="mevent"></param>protected override void OnMouseDown(MouseEventArgs mevent){if (mevent.Button == MouseButtons.Left){_mButtonState = State.Pressed;if (_mButtonStyle != Style.Flat){_glowAlpha = 255;}_fadeIn.Stop();_fadeOut.Stop();Invalidate();}base.OnMouseDown(mevent);}/// <summary>/// 鼠标弹起/// </summary>/// <param name="mevent"></param>protected override void OnMouseUp(MouseEventArgs mevent){if (mevent.Button == MouseButtons.Left){_mButtonState = State.Hover;_fadeIn.Stop();_fadeOut.Stop();Invalidate();}base.OnMouseUp(mevent);}/// <summary>/// 按钮变化/// </summary>/// <param name="e"></param>protected override void OnResize(EventArgs e){Rectangle r = ClientRectangle;r.X -= 1;r.Y -= 1;r.Width += 2;r.Height += 2;using (GraphicsPath rr = RoundRect(r, CornerRadius, CornerRadius, CornerRadius, CornerRadius)){Region = new Region(rr);}base.OnResize(e);}/// <summary>/// 鼠标活动类别/// </summary>public enum State{/// <summary>/// 正常状态/// </summary>
            None,/// <summary>/// 鼠标悬浮状态/// </summary>
            Hover,/// <summary>/// 鼠标按下/// </summary>
            Pressed}/// <summary>/// 绘制样式/// </summary>public enum Style{/// <summary>/// 只画背景的鼠标/// </summary>
            Default,/// <summary>/// 绘制按钮作为正常/// </summary>
            Flat};}