SBButton

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

【推广】 免费学中医，健康全家人
原文地址：https://www.cnblogs.com/Dincat/p/13450109.html