介绍 SBButton控件是从一组控件(Sysbytes控件)中创建的一个按钮控件，用于我正在编写的应用程序。这个按钮控件几乎可以用户喜欢的任何方式定制。你可以为这个控件的不同状态使用不同的样式，例如:DefaultStyle, MouseOverStyle, MouseDownStyle和DisabledStyle。 它是如何工作的 此控件从控件类和IButtonControl接口继承，并使用OnPaint事件使用GDI+绘制控件。这个控件使用了一些与。net提供的按钮控件不同的属性。以下是它的特性: DefaultStyleMouseOverStyleMouseDownStyleDisabledStyleRoundedCornersShowFocusCueImageImageAlignmentFocusCueColor 属性DefaultStyle、MouseOverStyle、MouseDownStyle和DisabledStyle派生自一个名为SBButtonAppearance的类，而且所有这些属性都有一些通用的子属性。它们是: BackColor1BackColor2HighLightColorGlowColorInnerBorderColorOuterBorderColorTextColorFillModeFontHighLightOpacity1HighLightOpacity2GlowOpacityInnerBorderOpacity 源代码 源代码的sbbuttonappearance anceclass如下: 隐藏,收缩,复制Code
[Serializable()] [TypeConverter(typeof(ExpandableObjectConverter))] public class SBButtonAppearance { public event EventHandler<EventArgs> SBButtonAppearanceChanged; private Color _backColor1 = SystemColors.ButtonFace; public Color BackColor1 { get { return _backColor1; } set { _backColor1 = value; AppearanceChanged(); } } private Color _backColor2 = SystemColors.ButtonFace; public Color BackColor2 { get { return _backColor2; } set { _backColor2 = value; AppearanceChanged(); } } private Color _outerBorderColor = SystemColors.ControlDarkDark; public Color OuterBorderColor { get { return _outerBorderColor; } set { _outerBorderColor = value; AppearanceChanged(); } } private Color _innerBorderColor = SystemColors.ControlLightLight; public Color InnerBorderColor { get { return _innerBorderColor; } set { _innerBorderColor = value; AppearanceChanged(); } } private Color _glowColor = SystemColors.ControlLightLight; public Color GlowColor { get { return _glowColor; } set { _glowColor = value; AppearanceChanged(); } } private Color _highLightColor = SystemColors.ControlLightLight; public Color HighLightColor { get { return _highLightColor; } set { _highLightColor = value; AppearanceChanged(); } } private Color _textColor = SystemColors.ControlText; public Color TextColor { get { return _textColor; } set { _textColor = value; AppearanceChanged(); } } private Font _font = SystemFonts.DefaultFont; public Font Font { get { return _font; } set { _font = value; AppearanceChanged(); } } private LinearGradientMode _fillMode = LinearGradientMode.Horizontal; public LinearGradientMode FillMode { get { return _fillMode; } set { _fillMode = value; AppearanceChanged(); } } private int _innerBorderOpacity = 200; public int InnerBorderOpacity { get { return _innerBorderOpacity; } set { if (value > 255) value = 255; if (value < 0) value = 0; _innerBorderOpacity = value; AppearanceChanged(); } } private int _highLightOpacity1 = 200; public int HightLightOpacity1 { get { return _highLightOpacity1; } set { if (value > 255) value = 255; if (value < 0) value = 0; _highLightOpacity1 = value; AppearanceChanged(); } } private int _highLightOpacity2 = 150; public int HightLightOpacity2 { get { return _highLightOpacity2; } set { if (value > 255) value = 255; if (value < 0) value = 0; _highLightOpacity2 = value; AppearanceChanged(); } } private int _glowOpacity = 120; public int GlowOpacity { get { return _glowOpacity; } set { if (value > 255) value = 255; if (value < 0) value = 0; _glowOpacity = value; AppearanceChanged(); } } public override string ToString() { return null; } private void AppearanceChanged() { EventHandler<EventArgs> temp = SBButtonAppearanceChanged; if (temp != null) temp(this, new EventArgs()); } }
绘制按钮代码: 隐藏,收缩,复制Code
protected override void OnPaint(PaintEventArgs e) { e.Graphics.SmoothingMode = SmoothingMode.HighQuality; e.Graphics.TextRenderingHint = System.Drawing.Text.TextRenderingHint.SystemDefault; if(!isMouseIn && !isMouseDown && this.Enabled) this.DrawDefault(e); if (isMouseIn && !isMouseDown && this.Enabled) this.DrawMouseOver(e); if (isMouseIn && isMouseDown && this.Enabled) this.DrawMouseDown(e); if (!isMouseIn && isMouseDown && this.Enabled) this.DrawMouseDown(e); if (!this.Enabled) this.DrawDisabled(e); if (this.Focused && this.ShowFocusCue && this.Enabled) ControlPaint.DrawBorder(e.Graphics, new Rectangle( 2, 2, this.Width - 4, this.Height - 4), this.FocusCueColor, ButtonBorderStyle.Dashed); } private void DrawDefault(PaintEventArgs e) { LinearGradientBrush brBackground = new LinearGradientBrush( this.ClientRectangle, this.DefaultStyle.BackColor1, this.DefaultStyle.BackColor2, this.DefaultStyle.FillMode); LinearGradientBrush brHighlight = new LinearGradientBrush(new Rectangle( 2, 2, this.Width - 5, this.Height / 2), Color.FromArgb(this.DefaultStyle.HightLightOpacity1, this.DefaultStyle.HighLightColor), Color.FromArgb(this.DefaultStyle.HightLightOpacity2, this.DefaultStyle.HighLightColor), LinearGradientMode.Vertical); LinearGradientBrush brGlow = new LinearGradientBrush(new Rectangle( 0, this.Height - this.Height / 4 - 1, this.Width - 1, this.Height / 4), Color.Transparent, Color.FromArgb(this.DefaultStyle.GlowOpacity, this.DefaultStyle.GlowColor), LinearGradientMode.Vertical); Pen pnOuterBorder = new Pen(this.DefaultStyle.OuterBorderColor, 1); Pen pnInnerBorder = new Pen(Color.FromArgb(DefaultStyle.InnerBorderOpacity, this.DefaultStyle.InnerBorderColor)); GraphicsPath gpBackground = Common.RoundedRect(new Rectangle( 0, 0, this.Width - 1, this.Height - 1), 3); GraphicsPath gpGlow = Common.RoundedRect(new Rectangle( 1, this.Height - this.Height / 4, this.Width - 3, this.Height / 4), 1,1,3,3); GraphicsPath gpHighlight = Common.RoundedRect(new Rectangle( 2, 2, this.Width - 5, this.Height / 2 - 1), 3, 3, 1, 1); GraphicsPath gpOuterBorder = Common.RoundedRect(new Rectangle( 0, 0, this.Width - 1, this.Height - 1), 3); GraphicsPath gpInnerBorder = Common.RoundedRect(new Rectangle( 1, 1, this.Width - 3, this.Height - 3), 3); Rectangle rectBackground = new Rectangle(0, 0, this.Width - 1, this.Height - 1); Rectangle rectGlow = new Rectangle(1, this.Height - this.Height / 4, this.Width - 3, this.Height / 4); Rectangle rectHighlight = new Rectangle(2, 2, this.Width - 5, this.Height / 2 - 1); Rectangle rectOuterBorder = new Rectangle(0, 0, this.Width - 1, this.Height - 1); Rectangle rectInnerBorder = new Rectangle(1, 1, this.Width - 3, this.Height - 3); Size textSize = TextRenderer.MeasureText(this.Text, this.DefaultStyle.Font); Point textPos = new Point(this.Width / 2 - textSize.Width / 2, this.Height / 2 - textSize.Height / 2); Point imagePos = new Point(); switch (this.ImageAlignment) { case Alignment.Right: if (this.Image != null) { textPos = new Point(5, this.Height / 2 - textSize.Height / 2); imagePos = new Point(this.Width - this.Image.Width - 5, this.Height / 2 - this.Image.Size.Height / 2); } break; case Alignment.Left: if (this.Image != null) { textPos = new Point(this.Width - textSize.Width - 5, this.Height / 2 - textSize.Height / 2); imagePos = new Point(5, this.Height / 2 - this.Image.Size.Height / 2); } break; } if (this.RoundedCorners) { e.Graphics.FillPath(brBackground, gpBackground); e.Graphics.FillPath(brGlow, gpGlow); e.Graphics.FillPath(brHighlight, gpHighlight); e.Graphics.DrawPath(pnOuterBorder, gpOuterBorder); e.Graphics.DrawPath(pnInnerBorder, gpInnerBorder); } else { e.Graphics.FillRectangle(brBackground, rectBackground); e.Graphics.FillRectangle(brGlow, rectGlow); e.Graphics.FillRectangle(brHighlight, rectHighlight); e.Graphics.DrawRectangle(pnOuterBorder, rectOuterBorder); e.Graphics.DrawRectangle(pnInnerBorder, rectInnerBorder); } if (this.Image != null) e.Graphics.DrawImage(this.Image, imagePos.X, imagePos.Y, this.Image.Width, this.Image.Height); TextRenderer.DrawText(e.Graphics, this.Text, this.DefaultStyle.Font, textPos, this.DefaultStyle.TextColor); }
方法DrawMouseOver、DrawMouseDown和DrawDisabled与DrawDefault相同，只是它们使用的颜色和不透明度值不同。您可能已经注意到，该方法调用了一个函数Common.RoundedRect。这个函数将返回一个带有圆角的矩形作为GraphicsPath。 下面是这个函数的代码: 隐藏,收缩,复制Code
public static System.Drawing.Drawing2D.GraphicsPath RoundedRect( System.Drawing.Rectangle baseRect, int topLeftRadius, int topRightRadius, int bottomLeftRadius, int bottomRightRadius) { int topLeftDiameter = topLeftRadius * 2; int topRightDiameter = topRightRadius * 2; int bottomLeftDiameter = bottomLeftRadius * 2; int bottomRightDiameter = bottomRightRadius * 2; System.Drawing.Drawing2D.GraphicsPath gp = new System.Drawing.Drawing2D.GraphicsPath(); System.Drawing.Rectangle rectTopLeft = new System.Drawing.Rectangle( baseRect.Left, baseRect.Top, topLeftDiameter, topLeftDiameter); System.Drawing.Rectangle rectTopRight = new System.Drawing.Rectangle( baseRect.Right - topRightDiameter, baseRect.Top, topRightDiameter, topRightDiameter); System.Drawing.Rectangle rectBottomLeft = new System.Drawing.Rectangle( baseRect.Left, baseRect.Bottom - bottomLeftDiameter, bottomLeftDiameter, bottomLeftDiameter); System.Drawing.Rectangle rectBottomRight = new System.Drawing.Rectangle( baseRect.Right - bottomRightDiameter, baseRect.Bottom - bottomRightDiameter, bottomRightDiameter, bottomRightDiameter); gp.AddArc(rectTopLeft, 180, 90); gp.AddArc(rectTopRight, 270, 90); gp.AddArc(rectBottomRight, 0, 90); gp.AddArc(rectBottomLeft, 90, 90); gp.CloseFigure(); return gp; } public static System.Drawing.Drawing2D.GraphicsPath RoundedRect( System.Drawing.Rectangle baseRect, int cornerRadius) { int diameter = cornerRadius * 2; System.Drawing.Drawing2D.GraphicsPath gp = new System.Drawing.Drawing2D.GraphicsPath(); System.Drawing.Rectangle rectTopLeft = new System.Drawing.Rectangle( baseRect.Left, baseRect.Top, diameter, diameter); System.Drawing.Rectangle rectTopRight = new System.Drawing.Rectangle( baseRect.Right - diameter, baseRect.Top, diameter, diameter); System.Drawing.Rectangle rectBottomLeft = new System.Drawing.Rectangle( baseRect.Left, baseRect.Bottom - diameter, diameter, diameter); System.Drawing.Rectangle rectBottomRight = new System.Drawing.Rectangle( baseRect.Right - diameter, baseRect.Bottom - diameter, diameter, diameter); gp.AddArc(rectTopLeft, 180, 90); gp.AddArc(rectTopRight, 270, 90); gp.AddArc(rectBottomRight, 0, 90); gp.AddArc(rectBottomLeft, 90, 90); gp.CloseFigure(); return gp; }
的兴趣点 此控件支持图像，并且只能向右或向左对齐。如果没有图像，文本将始终与控件的中心对齐。通过编辑DrawDefault、DrawMouseOver、DrawMouseDown和DrawDisabled这些方法，你可以非常容易地修改这些行为。 本文转载于：http://www.diyabc.com/frontweb/news446.html