重绘MenuStrip控件
效果如图：
首先添加 CustomProfessionalRenderer类 用于重绘控件菜单样式
/// <summary>
/// 自定义MenuStrip 控件菜单样式类
/// </summary>
public class CustomProfessionalRenderer : ToolStripProfessionalRenderer
{
private Color _startColor = Color.White;//选中的渐变开始颜色
private Color _endCoolor = Color.Blue;//选中的渐变颜色结束值
public CustomProfessionalRenderer()
: base()
{
}
////public CustomProfessionalRenderer(Color startColor, Color endColor)
//// : base()
////{
//// _startColor = startColor;
//// _endCoolor = endColor;
////} public Color StartColor
{
get { return _startColor; }
set
{
_startColor = value;
}
} public Color EndColor
{
get { return _endCoolor; }
set
{
_endCoolor = value;
}
} /// <summary>
/// 获取圆角矩形区域 radius=直径
/// </summary>
/// <param name="rect"></param>
/// <param name="radius"></param>
/// <returns></returns>
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, , ); // 右上角
arcRect.X = rect.Right - diameter;
path.AddArc(arcRect, , ); // 右下角
arcRect.Y = rect.Bottom - diameter;
path.AddArc(arcRect, , ); // 左下角
arcRect.X = rect.Left;
path.AddArc(arcRect, , );
path.CloseFigure();
return path;
} /// <summary>
/// 渲染背景 包括menustrip背景 toolstripDropDown背景
/// </summary>
/// <param name="e"></param>
protected override void OnRenderToolStripBackground(ToolStripRenderEventArgs e)
{
ToolStrip toolStrip = e.ToolStrip;
Graphics g = e.Graphics;
g.SmoothingMode = SmoothingMode.HighQuality;//抗锯齿
Rectangle bounds = e.AffectedBounds;
LinearGradientBrush lgbrush = new LinearGradientBrush(new Point(, ), new Point(, toolStrip.Height), Color.FromArgb(, _startColor), Color.FromArgb(, _endCoolor));
if (toolStrip is MenuStrip)
{
//由menuStrip的Paint方法定义 这里不做操作 }
else if (toolStrip is ToolStripDropDown)
{
int diameter = ;//直径
GraphicsPath path = new GraphicsPath();
Rectangle rect = new Rectangle(Point.Empty, toolStrip.Size);
Rectangle arcRect = new Rectangle(rect.Location, new Size(diameter, diameter)); path.AddLine(, , , );
// 右上角
arcRect.X = rect.Right - diameter;
path.AddArc(arcRect, , ); // 右下角
arcRect.Y = rect.Bottom - diameter;
path.AddArc(arcRect, , ); // 左下角
arcRect.X = rect.Left;
path.AddArc(arcRect, , );
path.CloseFigure();
toolStrip.Region = new Region(path);
g.FillPath(lgbrush, path);
}
else
{
base.OnRenderToolStripBackground(e);
}
} //渲染边框 不绘制边框
protected override void OnRenderToolStripBorder(ToolStripRenderEventArgs e)
{
//不调用基类的方法 屏蔽掉该方法 去掉边框
} //渲染箭头 更改箭头颜色
protected override void OnRenderArrow(ToolStripArrowRenderEventArgs e)
{
e.ArrowColor = _endCoolor;
base.OnRenderArrow(e);
} /// <summary>
/// 渲染项 不调用基类同名方法
/// </summary>
/// <param name="e"></param>
protected override void OnRenderMenuItemBackground(ToolStripItemRenderEventArgs e)
{
Graphics g = e.Graphics;
ToolStripItem item = e.Item;
ToolStrip toolstrip = e.ToolStrip; //渲染顶级项
if (toolstrip is MenuStrip)
{
LinearGradientBrush lgbrush = new LinearGradientBrush(new Point(, ), new Point(, item.Height), Color.FromArgb(, _endCoolor), Color.FromArgb(, _startColor));
if (e.Item.Selected)//选中
{
GraphicsPath gp = GetRoundedRectPath(new Rectangle(new Point(, ), item.Size), );
g.FillPath(lgbrush, gp);
}
if (item.Pressed)//按下
{
//创建上面左右2圆角的矩形路径
GraphicsPath path = new GraphicsPath();
int diameter = ;
Rectangle rect = new Rectangle(Point.Empty, item.Size);
Rectangle arcRect = new Rectangle(rect.Location, new Size(diameter, diameter));
// 左上角
path.AddArc(arcRect, , );
// 右上角
arcRect.X = rect.Right - diameter;
path.AddArc(arcRect, , );
path.AddLine(new Point(rect.Width, rect.Height), new Point(, rect.Height));
path.CloseFigure();
//填充路径
g.FillPath(lgbrush, path);
//g.FillRectangle(Brushes.White, new Rectangle(Point.Empty, item.Size));
}
}
else if (toolstrip is ToolStripDropDown)//渲染下拉项
{
g.SmoothingMode = SmoothingMode.HighQuality;
LinearGradientBrush lgbrush = new LinearGradientBrush(new Point(, ), new Point(item.Width, ), Color.FromArgb(, _startColor), Color.FromArgb(, _endCoolor));
if (item.Selected)
{
GraphicsPath gp = GetRoundedRectPath(new Rectangle(, , item.Width, item.Height), );
g.FillPath(lgbrush, gp);
}
}
else
{
base.OnRenderMenuItemBackground(e);
}
} /// <summary>
/// 渲染分界线
/// </summary>
/// <param name="e"></param>
protected override void OnRenderSeparator(ToolStripSeparatorRenderEventArgs e)
{
Graphics g = e.Graphics;
LinearGradientBrush lgbrush = new LinearGradientBrush(new Point(, ), new Point(e.Item.Width, ), _startColor, Color.FromArgb(, _endCoolor));
g.FillRectangle(lgbrush, new Rectangle(, e.Item.Height / , e.Item.Width, ));
//base.OnRenderSeparator(e);
} /// <summary>
/// 渲染图片区域 下拉菜单左边的图片区域
/// </summary>
/// <param name="e"></param>
protected override void OnRenderImageMargin(ToolStripRenderEventArgs e)
{
// base.OnRenderImageMargin(e);
//屏蔽掉左边图片竖条
} }
其次添加类 CustomMenuStripControl 继承MenuStrip类
public partial class CustomMenuStripControl : MenuStrip
{
private Color _startColor = Color.White;//选中的渐变开始颜色
private Color _endCoolor = Color.Blue;//选中的渐变颜色结束值
private CustomProfessionalRenderer render;
public CustomMenuStripControl()
{
render = new CustomProfessionalRenderer();
this.Renderer = render;
} [Category("wyl")]
[Description("选中渐变开始的颜色")]
public Color StartColor
{
get { return _startColor; }
set
{
_startColor = value;
render.StartColor = value;
base.Invalidate();
}
} [Category("wyl")]
[Description("选中渐变结束的颜色")]
public Color EndColor
{
get { return _endCoolor; }
set
{
_endCoolor = value;
render.EndColor = value;
base.Invalidate();
}
}
}