C#漂亮菜單設計

在工程化的應用中, 爲了取得良好的風格或者具有自身特色的界面，一個重要的方面就是要重繪控件，菜單作爲比較重要的資源，經常在軟件中使用，設計漂亮的菜單有助於建立良好的商業化軟件。

C#的提供了MenuStrip菜單控件，爲了重繪菜單，需要進行建立以MenuStrip爲基類的繼承類，而C#中，與菜單相關的重寫函數均位於ToolStripRenderer，也要重寫以ToolStripRenderer作爲基類的繼承類，在菜單MenuStrip繼承類中進行調用。

classCustomMenuStrip : MenuStrip

{

privateColor menu_Color = Color.FromArgb(200, 186, 209, 239);

privateColor selected_Color = Color.FromArgb(200, 175,150,10);

privateColor board_Color = Color.LightGray;

privateColor image_Color = Color.FromArgb(255, 0, 0, 128);

privateColor separator_color = Color.Black;

public CustomMenuStrip()

{

this.Renderer = newCustomProfessionalRenderer(menu_Color, selected_Color, board_Color, image_Color,separator_color);

}

publicvoid SetColor(Color mColor, Color selColor, Color bColor, Color iColor, Color sColor)

{

menu_Color = mColor;

selected_Color = selColor;

board_Color = bColor;

image_Color = iColor;

separator_color = sColor;

this.Renderer = newCustomProfessionalRenderer(menu_Color, selected_Color, board_Color, image_Color,separator_color);

}

下來重點在於重寫基於ToolStripRenderer的類CustomProfessionalRenderer，在該類中，重載OnRenderToolStripBackground進行菜單背景條和菜單下拉項的重繪

protectedoverridevoid OnRenderToolStripBackground(ToolStripRenderEventArgs e)

{

//判斷ToolStrip的類型

ToolStrip tsType = e.ToolStrip;

Graphics g = e.Graphics;

//抗鋸齒

g.SmoothingMode = SmoothingMode.HighQuality;

if (tsType isMenuStrip ||

tsType isToolStripDropDown)

{

//指定填充Menu欄與ToolBar欄的背景色的畫刷,使用線性漸變畫刷

Rectangle rect = newRectangle(newPoint(0,0), newSize(tsType.Width-1,tsType.Height-1));

LinearGradientBrush lgBursh = newLinearGradientBrush(rect, Color.Transparent, Color.Transparent, LinearGradientMode.Vertical);

R0 = menu_color.R;

B0 = menu_color.B;

G0 = menu_color.G;

A0 = menu_color.A;

float[] pos = newfloat[4];

pos[0] = 0.0F;pos[1] = 0.3F; pos[2] = 0.35F; pos[3] = 1.0F;

Color[] colors = newColor[4];

colors[0] =GetColor(0, 35, 24, 9);

colors[1] =GetColor(0, 13, 8, 3);

colors[2] = Color.FromArgb(A0, R0, G0, B0);

colors[3] =GetColor(0, 28, 29, 14);

ColorBlend mix = newColorBlend();

mix.Colors = colors;

mix.Positions = pos;

lgBursh.InterpolationColors = mix;

//填充窗口區域

g.FillRectangle(lgBursh, rect);

if(tsType isMenuStrip)

{

rect = newRectangle(newPoint(1, 1), newSize(tsType.Width - 2, tsType.Height/3 -2));

SolidBrush sBrush = newSolidBrush(Color.FromArgb(100, 255, 255, 255));

g.FillRectangle(sBrush, rect);

sBrush.Dispose();

}

lgBursh.Dispose();

}

elseif (tsType isToolStrip)

{

//指定填充Menu欄與ToolBar欄的背景色的畫刷,使用線性漸變畫刷

LinearGradientBrush lgBursh = newLinearGradientBrush(newPoint(0, 0),

newPoint(0, tsType.Height),

Color.FromArgb(0, Color.White),

Color.FromArgb(150, Color.LightBlue));

GraphicsPath path = newGraphicsPath(FillMode.Winding);

int diameter = 10;//直徑

Rectangle rect = newRectangle(Point.Empty, tsType.Size);

Rectangle arcRect = newRectangle(rect.Location, newSize(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();

//設置控件的窗口區域

tsType.Region = newRegion(path);

//填充窗口區域

g.FillPath(lgBursh,path);

}

else

{

base.OnRenderToolStripBackground(e);

}

protectedoverridevoid OnRenderToolStripBorder(ToolStripRenderEventArgs e)

{

//判斷ToolStrip的類型

ToolStrip tsType = e.ToolStrip;

Graphics g = e.Graphics;

//抗鋸齒

g.SmoothingMode = SmoothingMode.HighQuality;

if (tsType isToolStripDropDown)

{

//設置畫筆

Pen LinePen = newPen(board_Color,0.5F);

Rectangle rect = newRectangle(newPoint(1, 1), newSize(tsType.Width - 3, tsType.Height -3));

//畫邊框

g.DrawRectangle(LinePen, rect);

}

elseif (tsType isToolStrip)

{

//設置畫筆

Pen LinePen = newPen(board_Color, 0.5F);

GraphicsPath path = newGraphicsPath();

Rectangle rect = newRectangle(newPoint(-1, -1), newSize(tsType.Width +1, tsType.Height -1));

path.AddRectangle(rect);

//畫邊框

g.DrawPath(LinePen,path);

}

else

{

base.OnRenderToolStripBorder(e);

}

重載OnRenderMenuItemBackground用於繪製菜單某項被鼠標選中時的狀態

protectedoverridevoid OnRenderMenuItemBackground(ToolStripItemRenderEventArgs e)

{

Graphics g = e.Graphics;

ToolStripItem item = e.Item;

ToolStrip tsType = e.ToolStrip;

g.SmoothingMode = SmoothingMode.HighQuality;

//渲染頂級項

if (tsType isMenuStrip)

{

if (e.Item.Selected)

{

R0 =selected_Color.R;

B0 =selected_Color.B;

G0 =selected_Color.G;

A0 =selected_Color.A;

Rectangle rect = newRectangle(0, 0, item.Size.Width - 1,item.Size.Height - 1);

LinearGradientBrush lgBrush = newLinearGradientBrush(rect, Color.Transparent, Color.Transparent, LinearGradientMode.Vertical);

float[] pos = newfloat[4];

pos[0] = 0.0F;pos[1] = 0.3F; pos[2] = 0.35F; pos[3] = 1.0F;

Color[] colors = newColor[4];

colors[0] =GetColor(0, 0, 50, 100);

colors[1] =GetColor(0, 0, 0, 30);

colors[2] = Color.FromArgb(A0, R0, G0, B0);

colors[3] =GetColor(0, 0, 50, 100);

ColorBlend mix = newColorBlend();

mix.Colors =colors;

mix.Positions =pos;

lgBrush.InterpolationColors = mix;

g.FillRectangle(lgBrush, rect);

lgBrush.Dispose();

rect = newRectangle(newPoint(1, 1), newSize(tsType.Width - 2, tsType.Height / 3- 2));

g.FillRectangle(newSolidBrush(Color.FromArgb(100, 255, 255, 255)),rect);

Pen LinesPen = newPen(board_Color);

Point[] LinePoint = { newPoint(0, 2),

newPoint(item.Size.Width - 1, 2),

newPoint(item.Size.Width - 1,item.Size.Height - 3),

newPoint(0, item.Size.Height - 3),

newPoint(0, 2)};

g.DrawLines(LinesPen, LinePoint);

LinesPen.Dispose();

}

if (item.Pressed)

{

Pen LinesPen = newPen(board_Color,0.9F);//FromArgb(197, 228, 253));

Point[] LinePoint = { newPoint(0, 2),

newPoint(item.Size.Width - 1, 2),

newPoint(item.Size.Width - 1,item.Size.Height - 3),

newPoint(0, item.Size.Height - 3),

newPoint(0, 2)};

g.DrawLines(LinesPen, LinePoint);

LinesPen.Dispose();

}

//渲染下拉項

elseif (tsType isToolStripDropDown)

{

g.SmoothingMode = SmoothingMode.HighQuality;

LinearGradientBrush lgbrush = newLinearGradientBrush(newPoint(0, 0), newPoint(item.Width, item.Height ), Color.FromArgb(250, selected_Color),Color.FromArgb(0, Color.White));

if (item.Selected)

{

GraphicsPath gp = GetRoundedRectPath(newRectangle(0, 0, item.Width, item.Height), 10);

// g.FillPath(lgbrush, gp);

R0 =selected_Color.R;

B0 =selected_Color.B;

G0 = selected_Color.G;

A0 =selected_Color.A;

Rectangle rect = newRectangle(0, 0, item.Size.Width - 1,item.Size.Height - 1);

LinearGradientBrush lgBrush = newLinearGradientBrush(rect, Color.Transparent, Color.Transparent, LinearGradientMode.Vertical);

float[] pos = newfloat[4];

pos[0] = 0.0F;pos[1] = 0.3F; pos[2] = 0.35F; pos[3] = 1.0F;

Color[] colors = newColor[4];

colors[0] =GetColor(0, 0, 50, 100);

colors[1] =GetColor(0, 0, 0, 30);

colors[2] = Color.FromArgb(A0, R0, G0, B0);

colors[3] =GetColor(0, 0, 50, 100);

ColorBlend mix = newColorBlend();

mix.Colors =colors;

mix.Positions =pos;

lgBrush.InterpolationColors = mix;

g.FillRectangle(lgBrush, rect);

lgBrush.Dispose();

rect = newRectangle(newPoint(1, 1), newSize(item.Size.Width - 2,item.Size.Height / 3 - 2));

g.FillRectangle(newSolidBrush(Color.FromArgb(100, 255, 255, 255)),rect);

Pen LinesPen = newPen(board_Color);

Point[] LinePoint = { newPoint(0, 2),

newPoint(item.Size.Width - 1, 2),

newPoint(item.Size.Width - 1,item.Size.Height - 3),

newPoint(0, item.Size.Height - 3),

newPoint(0, 2)};

g.DrawLines(LinesPen, LinePoint);

LinesPen.Dispose();

}

else

{

//base.OnRenderMenuItemBackground(e);

}

繼承OnRenderSeparator函數以便得到Separator的特定效果

protectedoverridevoid OnRenderSeparator(ToolStripSeparatorRenderEventArgs e)

{

Graphics g = e.Graphics;

ToolStrip tsType = e.ToolStrip;

if (tsType isToolStripDropDown)

{

LinearGradientBrush lgbrush = newLinearGradientBrush(newPoint(0, 0),

newPoint(e.Item.Width, 0),

separator_color,

Color.FromArgb(100,separator_color));

g.FillRectangle(lgbrush, newRectangle(25, e.Item.Height / 2, e.Item.Width / 8 * 7, 1));

}

重載OnRenderImageMargin繪製菜單項中右邊的顯示圖標的區域

protectedoverridevoid OnRenderButtonBackground(ToolStripItemRenderEventArgs e)

{

Graphics g = e.Graphics;

g.SmoothingMode = SmoothingMode.HighQuality;

ToolStripItem item = e.Item;

if (item.Selected)

{

Pen LinesPen = newPen(Color.FromArgb(0, 0, 0));

Point[] LinePoint = { newPoint(0, 2),

newPoint(item.Size.Width - 1, 2),

newPoint(item.Size.Width - 1,item.Size.Height - 3),

newPoint(0, item.Size.Height - 3),

newPoint(0, 2)};

g.DrawLines(LinesPen, LinePoint);

SolidBrush brush = newSolidBrush(Color.FromArgb(197, 228, 253));

Rectangle rect = newRectangle(0, 2, item.Size.Width - 1,item.Size.Height - 5);

g.FillRectangle(brush, rect);

}

else

{

base.OnRenderMenuItemBackground(e);

}

至此，就完成了相應的菜單的繪製，得到效果：

具體代碼參見: https://download.csdn.net/download/mr_liyonghong/10308638

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