使用C#创建自定义背景色/形状的菜单栏与工具栏

C#对于菜单栏与工具栏都提供了统一的背景色,形状的渲染类,即ToolStripRenderer类，同时根据不同的情形，提供了多个继承类，分别是ToolStripProfessionalRender，ToolStripSystemRenderer，本片文章将通过继承ToolStripProfessionalRender来实现菜单与工具栏的自定义

1.通过VS2008创建一个C#类，并命名为CustomProfessionalRenderer.cs

2.在CustomProfessionalRenderer.cs文件中加入以下引用

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Drawing;
using System.Drawing.Drawing2D;

3.定义CustomProfessionalRenderer类的控件颜色的全局变量

//默认的绘制背景色的颜色
private Color menu_color = Color.Red;      //菜单的背景色
private Color toolbar_color = Color.Red;   //工具栏的背景色
private Color image_color = Color.Red;     //菜单图片栏的背景色
private Color separator_color = Color.Red; //菜单分割条的背景色

4.定义CustomProfessionalRenderer类的构造函数

public CustomProfessionalRenderer()
            : base()
{
}

public CustomProfessionalRenderer(Color mColor, Color iColor, Color sColor)
            : base()
{
    menu_color = mColor;
    image_color = iColor;
    separator_color = sColor;
}

public CustomProfessionalRenderer(Color tColor)
            :base()
{
    toolbar_color = tColor;
}

5.重写绘制菜单栏和工具栏背景色的函数，如下所示

protected override void OnRenderToolStripBackground(ToolStripRenderEventArgs e)
        {
            //判断ToolStrip的类型
            ToolStrip tsType = e.ToolStrip;
            Graphics g = e.Graphics;
            //抗锯齿
            g.SmoothingMode = SmoothingMode.HighQuality;            

            if (tsType is MenuStrip ||                
                tsType is ToolStripDropDown)
            {
                //指定填充Menu栏与ToolBar栏的背景色的画刷,使用线性渐变画刷
                LinearGradientBrush lgBursh = new LinearGradientBrush(new Point(0, 0),
                                                                      new Point(0, tsType.Height),
                                                                      Color.FromArgb(255, Color.White),
                                                                      Color.FromArgb(150, menu_color));
                GraphicsPath path = new GraphicsPath(FillMode.Winding);
                int diameter = 10;//直径                
                Rectangle rect = new Rectangle(Point.Empty, tsType.Size);
                Rectangle arcRect = new Rectangle(rect.Location, new Size(diameter, diameter));

                path.AddLine(0, 0, 10, 0);
                // 右上角
                arcRect.X = rect.Right - diameter;
                path.AddArc(arcRect, 270, 90);

                // 右下角
                arcRect.Y = rect.Bottom - diameter;
                path.AddArc(arcRect, 0, 90);

                // 左下角
                arcRect.X = rect.Left;
                path.AddArc(arcRect, 90, 90);
                path.CloseFigure();

                //设置控件的窗口区域
                tsType.Region = new Region(path);

                //填充窗口区域
                g.FillPath(lgBursh, path);
            }
            else if (tsType is ToolStrip)
            {
                //指定填充Menu栏与ToolBar栏的背景色的画刷,使用线性渐变画刷
                LinearGradientBrush lgBursh = new LinearGradientBrush(new Point(0, 0),
                                                                      new Point(0, tsType.Height),
                                                                      Color.FromArgb(255, Color.White),
                                                                      Color.FromArgb(150, toolbar_color));
                GraphicsPath path = new GraphicsPath(FillMode.Winding);
                int diameter = 10;//直径                
                Rectangle rect = new Rectangle(Point.Empty, tsType.Size);
                Rectangle arcRect = new Rectangle(rect.Location, new Size(diameter, diameter));

                path.AddLine(0, 0, 10, 0);
                // 右上角
                arcRect.X = rect.Right - diameter;
                path.AddArc(arcRect, 270, 90);

                // 右下角
                arcRect.Y = rect.Bottom - diameter;
                path.AddArc(arcRect, 0, 90);

                // 左下角
                arcRect.X = rect.Left;
                path.AddArc(arcRect, 90, 90);
                path.CloseFigure();

                //设置控件的窗口区域
                tsType.Region = new Region(path);

                //填充窗口区域
                g.FillPath(lgBursh, path);
            }
            else
            {
                base.OnRenderToolStripBackground(e);
            }
        }

6.重写绘制菜单栏和工具栏边框的函数，如下所示

protected override void OnRenderToolStripBorder(ToolStripRenderEventArgs e)
        {
            //判断ToolStrip的类型
            ToolStrip tsType = e.ToolStrip;
            Graphics g = e.Graphics;
            //抗锯齿
            g.SmoothingMode = SmoothingMode.HighQuality;                        

            if (tsType is MenuStrip ||
                tsType is ToolStripDropDown)
            {
                //设置画笔
                Pen LinePen = new Pen(menu_color);
                GraphicsPath path = new GraphicsPath(FillMode.Winding);
                int diameter = 10;//直径                
                Rectangle rect = new Rectangle(Point.Empty, tsType.Size);
                Rectangle arcRect = new Rectangle(rect.Location, new Size(diameter, diameter));

                path.AddLine(0, 0, 10, 0);
                // 右上角
                arcRect.X = rect.Right - diameter;
                path.AddArc(arcRect, 270, 90);

                // 右下角
                arcRect.Y = rect.Bottom - diameter;
                path.AddArc(arcRect, 0, 90);

                // 左下角
                arcRect.X = rect.Left;
                path.AddArc(arcRect, 90, 90);
                path.CloseFigure();

                //画边框
                g.DrawPath(LinePen, path);
            }
            else if (tsType is ToolStrip)
            {
                //设置画笔
                Pen LinePen = new Pen(toolbar_color);
                GraphicsPath path = new GraphicsPath(FillMode.Winding);
                int diameter = 10;//直径                
                Rectangle rect = new Rectangle(Point.Empty, tsType.Size);
                Rectangle arcRect = new Rectangle(rect.Location, new Size(diameter, diameter));

                path.AddLine(0, 0, 10, 0);
                // 右上角
                arcRect.X = rect.Right - diameter;
                path.AddArc(arcRect, 270, 90);

                // 右下角
                arcRect.Y = rect.Bottom - diameter;
                path.AddArc(arcRect, 0, 90);

                // 左下角
                arcRect.X = rect.Left;
                path.AddArc(arcRect, 90, 90);
                path.CloseFigure();

                //画边框
                g.DrawPath(LinePen, path);
            }
            else
            {
                base.OnRenderToolStripBorder(e);
            }
        }

7.当菜单上存在多级目录时，会显示相应的小箭头，想修改，请重写如下函数

protected override void OnRenderArrow(ToolStripArrowRenderEventArgs e)
        {
            e.ArrowColor = menu_color;
            base.OnRenderArrow(e);
        }

8.重写子菜单的渲染函数，如下所示

protected override void OnRenderMenuItemBackground(ToolStripItemRenderEventArgs e)
        {
            Graphics g = e.Graphics;
            ToolStripItem item = e.Item;
            ToolStrip tsType = e.ToolStrip;

            g.SmoothingMode = SmoothingMode.HighQuality;

            //渲染顶级项
            if (tsType is MenuStrip)
            {                
                if (e.Item.Selected)
                {
                    Pen LinesPen = new Pen(Color.FromArgb(205, 226, 252));
                    Point[] LinePoint = { new Point(0, 2),
                                           new Point(item.Size.Width - 1, 2),
                                           new Point(item.Size.Width - 1, item.Size.Height - 3),
                                           new Point(0, item.Size.Height - 3),
                                           new Point(0, 2)};
                    g.DrawLines(LinesPen, LinePoint);

                    SolidBrush brush = new SolidBrush(Color.FromArgb(197, 228, 253));
                    Rectangle rect = new Rectangle(0, 2, item.Size.Width - 1, item.Size.Height - 5);
                    g.FillRectangle(brush, rect);
                }
                if (item.Pressed)
                {
                    Pen LinesPen = new Pen(Color.FromArgb(197, 228, 253));
                    Point[] LinePoint = { new Point(0, 2),
                                           new Point(item.Size.Width - 1, 2),
                                           new Point(item.Size.Width - 1, item.Size.Height - 3),
                                           new Point(0, item.Size.Height - 3),
                                           new Point(0, 2)};
                    g.DrawLines(LinesPen, LinePoint);
                }
            }
            //渲染下拉项
            else if (tsType is ToolStripDropDown)
            {
                g.SmoothingMode = SmoothingMode.HighQuality;
                LinearGradientBrush lgbrush = new LinearGradientBrush(new Point(0, 0), new Point(item.Width, 0), Color.FromArgb(200, menu_color), Color.FromArgb(0, Color.White));
                if (item.Selected)
                {
                    GraphicsPath gp = GetRoundedRectPath(new Rectangle(0, 0, item.Width, item.Height), 10);
                    g.FillPath(lgbrush, gp);
                }
            }
            else
            {
                base.OnRenderMenuItemBackground(e);
            }
        }

9.重写菜单上分割线的函数，如下所示

protected override void OnRenderSeparator(ToolStripSeparatorRenderEventArgs e)
        {
            Graphics g = e.Graphics;

            ToolStrip tsType = e.ToolStrip;

            if ( tsType is ToolStripDropDown)
            {
                LinearGradientBrush lgbrush = new LinearGradientBrush(new Point(0, 0),
                                                                  new Point(e.Item.Width, 0),
                                                                  separator_color,
                                                                  Color.FromArgb(0, separator_color));
                g.FillRectangle(lgbrush, new Rectangle(33, e.Item.Height / 2, e.Item.Width / 4 * 3, 1));
            }                                                
        }

10.重写菜单上左边放置图片的区域，如下所示

protected override void OnRenderImageMargin(ToolStripRenderEventArgs e)
        {
            //base.OnRenderImageMargin(e);
            //屏蔽掉左边图片竖条

            Graphics g = e.Graphics;
            g.SmoothingMode = SmoothingMode.HighQuality;
            Rectangle image_rect = e.AffectedBounds;

            //SolidBrush brush = new SolidBrush(image_color);
            LinearGradientBrush lgbrush = new LinearGradientBrush(new Point(0, 0), 
                                                                  new Point(image_rect.Width, 0),
                                                                  Color.FromArgb(200, image_color), 
                                                                  Color.FromArgb(0, Color.White));
            Rectangle rect = new Rectangle(0, 0, image_rect.Width, image_rect.Height);
            g.FillRectangle(lgbrush, rect);
        }

11.重写绘制工具栏上BUTTON按钮背景色的函数，如下所示

protected override void OnRenderButtonBackground(ToolStripItemRenderEventArgs e)
        {
            Graphics g = e.Graphics;
            g.SmoothingMode = SmoothingMode.HighQuality;
            ToolStripItem item = e.Item;

            if (item.Selected)
            {
                Pen LinesPen = new Pen(Color.FromArgb(205, 226, 252));
                Point[] LinePoint = { new Point(0, 2),
                                           new Point(item.Size.Width - 1, 2),
                                           new Point(item.Size.Width - 1, item.Size.Height - 3),
                                           new Point(0, item.Size.Height - 3),
                                           new Point(0, 2)};
                g.DrawLines(LinesPen, LinePoint);

                SolidBrush brush = new SolidBrush(Color.FromArgb(197, 228, 253));
                Rectangle rect = new Rectangle(0, 2, item.Size.Width - 1, item.Size.Height - 5);
                g.FillRectangle(brush, rect);
            }
            else
            {
                base.OnRenderMenuItemBackground(e);
            }
        }

12.另在代码上加入以下函数

public static GraphicsPath GetRoundedRectPath(Rectangle rect, int radius)
        {
            int diameter = radius;
            Rectangle arcRect = new Rectangle(rect.Location, new Size(diameter, diameter));
            GraphicsPath path = new GraphicsPath();

            // 左上角
            path.AddArc(arcRect, 180, 90);

            // 右上角
            arcRect.X = rect.Right - diameter;
            path.AddArc(arcRect, 270, 90);

            // 右下角
            arcRect.Y = rect.Bottom - diameter;
            path.AddArc(arcRect, 0, 90);

            // 左下角
            arcRect.X = rect.Left;
            path.AddArc(arcRect, 90, 90);
            path.CloseFigure();

            return path;
        }

到此为止，已经写好了菜单与工具栏的渲染类，下面就是如何调用了

1.菜单栏的调用

class CustomMenuStrip : MenuStrip
{
    private Color menu_Color = Color.Gray;
    private Color image_Color = Color.Gray;
    private Color separator_color = Color.Gray;

    public CustomMenuStrip()
    {
        this.Renderer = new CustomProfessionalRenderer(menu_Color, image_Color, separator_color);
    }

    public void SetColor(Color mColor, Color iColor, Color sColor)
    {
        menu_Color = mColor;
        image_Color = iColor;
        separator_color = sColor;
        this.Renderer = new CustomProfessionalRenderer(menu_Color, image_Color, separator_color);
    }
}

2.工具栏的调用

class CunstomToolStrip : ToolStrip
{
    private Color _themeColor = Color.Gray;

    public CunstomToolStrip()
    {            
        this.Renderer = new CustomProfessionalRenderer(_themeColor);
    }

    public Color ThemeColor
    {
        get { return _themeColor; }
        set
        {
            _themeColor = value;
            this.Renderer = new CustomProfessionalRenderer(_themeColor);
        }
    }
}

按照上述方式使用之后,大家可以看到如下的菜单/工具栏界面