C重绘windows窗体标题栏和边框

本文格式为Word版，下载可任意编辑——C重绘windows窗体标题栏和边框C#重绘windows窗体标题栏和边框

摘要

windows桌面应用程序都有标准的标题栏和边框，大部分程序也默认使用这些样式，一些对视觉效果要求较高的程序，如,MSN，迅雷等闲聊工具的样式则与传统的windows程序大不一致，其中迅雷还将他们的BOLT界面引擎开放，使得大家也可以创立类似迅雷一样的界面。那么这些软件的界面是怎样实现的呢，使用C#是否也可以实现类似界面？

重绘方式

常见的自定义标题栏和边框的方式有两种，一种是隐蔽标题栏和边框（称为非客户区），然后在客户区（可以放置控件的空间）使用一些常用的控件和图片来表示边框，这种方式较简单而麻烦，但如标题栏的拖动，边框的拖拽来改变窗体大小等效果，则有需要重新实现，另外有些客户区的鼠标事件，控件布局等也需要注意调整；另一种则是大部分软件实现方式，也较难一些；它利用windows的消息机制，截获windows消息，从而改变消息的行为。即windows的一些消息，会引起窗体绘制或重绘标题栏和边框的行为，因此只要结果这部分消息，然后开发人员自己处理绘制过程，并忽略默认行为，从而达到自定义的目的。C#绘制接口

windows消息对于C#开发新手来说较生疏，原因是.net已经将windows消息机制进行了封装，使得我们很难发现windows消息的踪迹，其实它是以另一个身份存在着--事件。如控件的OnClick，Mouse等事件，都是对windows消息的封装，这样的目的更简单理解，和运用。.net提供了处理消息的接口，常用的方法为Control控件的voidWndProc(refMessagem)方法，该方法用于接收任何发送到该控件的windows消息。那么我们就可以通过重写该方法来截获绘制窗体标题栏和边框的消息了。

找到了截获windows消息的接口，那么就需要知道哪些windows消息会引起窗体标题栏和边框的重绘。使用工具SPY++查看消息，发现windows消息WM_NCPAINT(0x85)和WM_NCACTIVATE(0x86)，WM_NCRBUTTONDOWN(0x00A4)，WM_SETCURSOR(0x0020)，WM_NCLBUTTONUP(0x00A2)，WM_NCLBUTTONDOWN(0xA1)等会重绘标题栏和边框。其中WM_NCPAINT和WM_NCACTIVATE会引起重绘标题栏和边框，消息WM_NCRBUTTONDOWN会触发标题栏的右键菜单，截获该消息可以自定义标题栏的右键菜单；其他消息会引起ConrtolBox(最小化，最大化，关闭按钮区域)的重绘。因此我们可以从截获这些消息入手。如下为WndProc方法的结构：usingSystem;

usingSystem.Collections.Generic;usingSystem.Windows.Forms;

usingSystem.ComponentModel;usingSystem.Drawing;

usingSystem.Drawing.Drawing2D;

usingSystem.Runtime.InteropServices;usingSystem.Diagnostics;

namespaceCaptionBox{

publicclassThemeForm:Form{#regionprivatestructs

struct_NonClientSizeInfo{

publicSizeCaptionButtonSize;publicSizeBorderSize;publicintCaptionHeight;publicRectangleCaptionRect;publicRectangleRect;

publicRectangleClientRect;publicintWidth;publicintHeight;};

#endregion#regionconstants

constintWM_NCACTIVATE=0x86;constintWM_NCPAINT=0x85;

constintWM_NCLBUTTONDOWN=0xA1;constintWM_NCRBUTTONDOWN=0x00A4;constintWM_NCRBUTTONUP=0x00A5;constintWM_NCMOUSEMOVE=0x00A0;constintWM_NCLBUTTONUP=0x00A2;constintWM_NCCALCSIZE=0x0083;constintWM_NCMOUSEHOVER=0x02A0;constintWM_NCMOUSELEAVE=0x02A2;constintWM_NCHITTEST=0x0084;constintWM_NCCREATE=0x0081;//constintWM_RBUTTONUP=0x0205;constintWM_LBUTTONDOWN=0x0201;constintWM_CAPTURECHANGED=0x0215;constintWM_LBUTTONUP=0x0202;constintWM_SETCURSOR=0x0020;constintWM_CLOSE=0x0010;

constintWM_SYSCOMMAND=0x0112;

constintWM_MOUSEMOVE=0x0200;constintWM_SIZE=0x0005;constintWM_SIZING=0x0214;

constintWM_GETMINMAXINFO=0x0024;constintWM_ENTERSIZEMOVE=0x0231;

constintWM_WINDOWPOSCHANGING=0x0046;

//FORWM_SIZINGMSGWPARAMconstintWMSZ_BOTTOM=6;constintWMSZ_BOTTOMLEFT=7;constintWMSZ_BOTTOMRIGHT=8;constintWMSZ_LEFT=1;constintWMSZ_RIGHT=2;constintWMSZ_TOP=3;constintWMSZ_TOPLEFT=4;constintWMSZ_TOPRIGHT=5;//leftmousebuttonisdown.constintMK_LBUTTON=0x0001;constintSC_CLOSE=0xF060;constintSC_MAXIMIZE=0xF030;constintSC_MINIMIZE=0xF020;constintSC_RESTORE=0xF120;constintSC_CONTEXTHELP=0xF180;constintHTCAPTION=2;constintHTCLOSE=20;constintHTHELP=21;constintHTMAXBUTTON=9;constintHTMINBUTTON=8;constintHTTOP=12;constintSM_CYBORDER=6;constintSM_CXBORDER=5;constintSM_CYCAPTION=4;constintCS_DropSHADOW=0x20000;constintGCL_STYLE=(-26);#endregion

#regionwindowsapi

[DllImport(\

privatestaticexternIntPtrGetWindowDC(IntPtrhwnd);[DllImport(\

[return:MarshalAs(UnmanagedType.Bool)]

privatestaticexternboolGetWindowRect(IntPtrhwnd,ref_RECTrect);

[DllImport(\

privatestaticexternintReleaseDC(IntPtrhwnd,IntPtrhdc);[DllImport(\

publicstaticexternintSetClassLong(IntPtrhwnd,intnIndex,intdwNewLong);

[DllImport(\

publicstaticexternintGetClassLong(IntPtrhwnd,intnIndex);#endregion

#regiondefaultconstructor

publicThemeForm(){

Text=\

CloseButtonImage=Properties.Resources.close.ToBitmap();CloseButtonHoverImage=Properties.Resources.close2.ToBitmap();CloseButtonPressDownImage=Properties.Resources.close2.ToBitmap();

MaximumButtonImage=Properties.Resources.max.ToBitmap();MaximumButtonHoverImage=Properties.Resources.max2.ToBitmap();MaximumButtonPressDownImage=Properties.Resources.max2.ToBitmap();MaximumNormalButtonImage

Properties.Resources.maxnorm.ToBitmap();MaximumNormalButtonHoverImageProperties.Resources.maxnorm2.ToBitmap();MaximumNormalButtonPressDownImageProperties.Resources.maxnorm2.ToBitmap();

===

MinimumButtonImage=Properties.Resources.min.ToBitmap();MinimumButtonHoverImage=Properties.Resources.min2.ToBitmap();MinimumButtonPressDownImage=Properties.Resources.min2.ToBitmap();

HelpButtonImage=Properties.Resources.help.ToBitmap();HelpButtonHoverImage=Properties.Resources.help2.ToBitmap();HelpButtonPressDownImage=Properties.Resources.help2.ToBitmap();CaptionColor=Brushes.White;

CaptionBackgroundColor=Color.DimGray;

SetClassLong(this.Handle,GCL_STYLE,GetClassLong(this.Handle,GCL_STYLE)|CS_DropSHADOW);//API函数加载，实现窗体边框阴影效果}

#endregion

[DefaultValue(\[Browsable(true)]

[Category(\publicvirtualContextMenuStripCaptionContextMenu{get;set;}protectedvirtualvoidOnCaptionContextMenu(intx,inty){if(this.CaptionContextMenu!=null)this.CaptionContextMenu.Show(x,y);}

#regionproperties

[Category(\

[Description(\[DisplayName(\[DesignOnly(true)]

publicImageCloseButtonImage{get;set;}

[Category(\[Description(\buttonimagepresseddownincontrolbox.\[DisplayName(\[DesignOnly(true)]

publicImageCloseButtonPressDownImage{get;set;}[Category(\

[Description(\[DisplayName(\[DesignOnly(true)]

publicImageCloseButtonHoverImage{get;set;}

[Category(\

[Description(\[DisplayName(\[DesignOnly(true)]

publicImageMaximumButtonImage{get;set;}

[Category(\

[Description(\[DisplayName(\[DesignOnly(true)]

publicImageMaximumButtonHoverImage{get;set;}

[Category(\

[Description(\buttonpresseddownimageincontrolbox.\

[DisplayName(\[DesignOnly(true)]

publicImageMaximumButtonPressDownImage{get;set;}[Category(\

[Description(\[DisplayName(\[DesignOnly(true)]

publicImageMaximumNormalButtonImage{get;set;}

[Category(\

[Description(\Normalbuttonhoverimageincontrolbox.\

[DisplayName(\[DesignOnly(true)]

publicImageMaximumNormalButtonHoverImage{get;set;}[Category(\

[Description(\Normalbuttonpresseddownimageincontrolbox.\

[DisplayName(\[DesignOnly(true)]

publicImageMaximumNormalButtonPressDownImage{get;set;}[Category(\

[Description(\[DisplayName(\[DesignOnly(true)]

publicImageMinimumButtonImage{get;set;}

[Category(\

[Description(\[DisplayName(\[DesignOnly(true)]

publicImageMinimumButtonHoverImage{get;set;}

[Category(\

[Description(\buttonpresseddownimageincontrolbox.\

[DisplayName(\[DesignOnly(true)]

publicImageMinimumButtonPressDownImage{get;set;}[Category(\

[Description(\[DisplayName(\[DesignOnly(true)]

publicImageHelpButtonImage{get;set;}

[Category(\

[Description(\[DisplayName(\[DesignOnly(true)]

publicImageHelpButtonHoverImage{get;set;}

[Category(\

[Description(\buttonpresseddownimageincontrolbox.\[DisplayName(\[DesignOnly(true)]

publicImageHelpButtonPressDownImage{get;set;}[Category(\

[Description(\[DisplayName(\[DesignOnly(true)]

publicBrushCaptionColor{get;set;}

[Category(\

[Description(\[DisplayName(\[DefaultValue(typeof(Color),\[DesignOnly(true)]

publicColorCaptionBackgroundColor{get;set;}#endregion

#regionhelpmethods

private_NonClientSizeInfoGetNonClientInfo(IntPtrhwnd){_NonClientSizeInfoinfo=new_NonClientSizeInfo();info.CaptionButtonSize=SystemInformation.CaptionButtonSize;

info.CaptionHeight=SystemInformation.CaptionHeight;switch(this.FormBorderStyle){caseSystem.Windows.Forms.FormBorderStyle.Fixed3D:info.BorderSize=SystemInformation.FixedFrameBorderSize;break;caseSystem.Windows.Forms.FormBorderStyle.FixedDialog:info.BorderSize=SystemInformation.FixedFrameBorderSize;break;caseSystem.Windows.Forms.FormBorderStyle.FixedSingle:info.BorderSize=SystemInformation.FixedFrameBorderSize;break;case

System.Windows.Forms.FormBorderStyle.FixedToolWindow:info.BorderSize=SystemInformation.FixedFrameBorderSize;info.CaptionButtonSize=SystemInformation.ToolWindowCaptionButtonSize;info.CaptionHeight=SystemInformation.ToolWindowCaptionHeight;break;caseSystem.Windows.Forms.FormBorderStyle.Sizable:info.BorderSize=SystemInformation.FrameBorderSize;break;case

System.Windows.Forms.FormBorderStyle.SizableToolWindow:info.CaptionButtonSize=SystemInformation.ToolWindowCaptionButtonSize;info.BorderSize=SystemInformation.FrameBorderSize;info.CaptionHeight=SystemInformation.ToolWindowCaptionHeight;break;default:info.BorderSize=SystemInformation.BorderSize;break;}

_RECTareatRect=new_RECT();

GetWindowRect(hwnd,refareatRect);

intwidth=areatRect.right-areatRect.left;intheight=areatRect.bottom-areatRect.top;info.Width=width;info.Height=height;

Pointxy=newPoint(areatRect.left,areatRect.top);xy.Offset(-areatRect.left,-areatRect.top);

info.CaptionRect=newRectangle(xy.X,xy.Y+info.BorderSize.Height,width,info.CaptionHeight);

info.Rect=newRectangle(xy.X,xy.Y,width,height);info.ClientRect=newRectangle(xy.X+info.BorderSize.Width,xy.Y+info.CaptionHeight+info.BorderSize.Height,width-info.BorderSize.Width*2,height-info.CaptionHeight-info.BorderSize.Height*2);

returninfo;}

privatevoidDrawTitle(Graphicsg,_NonClientSizeInfoncInfo,boolactive){

inttitleX;

if(this.ShowIcong.DrawIcon(this.Icon,newRectangle(newPoint(ncInfo.BorderSize.Width,ncInfo.BorderSize.Height+(ncInfo.CaptionHeight-iconSize.Height)/2),iconSize));titleX=ncInfo.BorderSize.Width+iconSize.Width+ncInfo.BorderSize.Width;}else{titleX=ncInfo.BorderSize.Width;}

SizeFcaptionTitleSize=g.MeasureString(this.Text,SystemFonts.CaptionFont);

g.DrawString(this.Text,SystemFonts.CaptionFont,CaptionColor,newRectangleF(titleX,

(ncInfo.BorderSize.Height+ncInfo.CaptionHeight-captionTitleSize.Height)/2,ncInfo.CaptionRect.Width-ncInfo.BorderSize.Width*2-SystemInformation.MinimumWindowSize.Width,ncInfo.CaptionRect.Height),StringFormat.GenericTypographic);}

privatevoidDrawBorder(Graphicsg,_NonClientSizeInfoncInfo,Brushbackground,boolactive){

RectangleborderTop=newRectangle(ncInfo.Rect.Left,ncInfo.Rect.Top,ncInfo.Rect.Left+ncInfo.Rect.Width,ncInfo.Rect.Top+ncInfo.BorderSize.Height);RectangleborderLeft=newRectangle(newPoint(ncInfo.Rect.Location.X,ncInfo.Rect.Location.Y+ncInfo.BorderSize.Height),newSize(ncInfo.BorderSize.Width,ncInfo.ClientRect.Height+ncInfo.CaptionHeight+ncInfo.BorderSize.Height));

RectangleborderRight=newRectangle(ncInfo.Rect.Left+ncInfo.Rect.Width-ncInfo.BorderSize.Width,ncInfo.Rect.Top+ncInfo.BorderSize.Height,ncInfo.BorderSize.Width,ncInfo.ClientRect.Height+ncInfo.CaptionHeight+ncInfo.BorderSize.Height);

RectangleborderBottom=newRectangle(ncInfo.Rect.Left+ncInfo.BorderSize.Width,ncInfo.Rect.Top+ncInfo.Rect.Height-ncInfo.BorderSize.Height,ncInfo.Rect.Width-ncInfo.BorderSize.Width*2,ncInfo.Rect.Height);

//Rectangleleftbottom=newRectangle(newPoint(ncInfo.Rect.Location.X,ncInfo.Rect.Height-ncInfo.BorderSize.Width*2),

//newSize(ncInfo.BorderSize.Width*2,

ncInfo.BorderSize.Width*2));

//g.FillPie(Brushes.Red,leftbottom,90,180);//g.FillRectangle(Brushes.Red,leftbottom);//topborder

g.FillRectangle(background,borderTop);//leftborder

g.FillRectangle(background,borderLeft);//rightborder

g.FillRectangle(background,borderRight);//bottomborder

g.FillRectangle(background,borderBottom);}

privatevoidDrawCaption(IntPtrhwnd,boolactive){IntPtrdc;Graphicsg;SizeiconSize;

_NonClientSizeInfoncInfo;BrushbackgroundColor=SolidBrush(CaptionBackgroundColor);

BrushforegroundColor=CaptionColor;iconSize=SystemInformation.SmallIconSize;dc=GetWindowDC(hwnd);

ncInfo=GetNonClientInfo(hwnd);g=Graphics.FromHdc(dc);

g.FillRectangle(backgroundColor,ncInfo.CaptionRect);DrawBorder(g,ncInfo,backgroundColor,active);DrawTitle(g,ncInfo,active);

DrawControlBox(g,ncInfo,backgroundColor,this.ControlBox,this.MaximizeBox,this.MinimizeBox,this.HelpButton);

g.Dispose();

ReleaseDC(hwnd,dc);}

privatevoidDrawControlBox(Graphicsg,_NonClientSizeInfoinfo,Brushbackground,boolcloseBtn,boolmaxBtn,boolminBtn,boolhelpBtn){

if(this.ControlBox){intcloseBtnPosX=info.CaptionRect.Left+

new

info.CaptionRect.Width-info.BorderSize.Widthinfo.CaptionButtonSize.Width;intmaxBtnPosX=closeBtnPosXinfo.CaptionButtonSize.Width;intminBtnPosX=maxBtnPosXinfo.CaptionButtonSize.Width;intbtnPosY=info.BorderSize.Height(info.CaptionHeight-info.CaptionButtonSize.Height)/2;

---+RectanglebtnRect=newRectangle(newPoint(closeBtnPosX,btnPosY),info.CaptionButtonSize);RectanglemaxRect=newRectangle(newPoint(maxBtnPosX,btnPosY),info.CaptionButtonSize);RectangleminRect=newRectangle(newPoint(minBtnPosX,btnPosY),info.CaptionButtonSize);BrushbackgroundColorSolidBrush(CaptionBackgroundColor);

=

newg.FillRectangle(backgroundColor,btnRect);g.FillRectangle(backgroundColor,maxRect);g.FillRectangle(backgroundColor,minRect);g.DrawImage(CloseButtonImage,btnRect);if(this.MaximizeBox||this.MinimizeBox){if(this.FormBorderStyle!=System.Windows.Forms.FormBorderStyle.FixedToolWindow

}else{

g.DrawImage(MaximumButtonImage,maxRect);}

g.DrawImage(MinimumButtonImage,minRect);}}elseif(this.HelpButton){if(this.FormBorderStyle!=System.Windows.Forms.FormBorderStyle.FixedToolWindow}}}}

#endregion

#regionMajormethodWndProc

privateintLOBYTE(longp){return(int)(p}privateintHIBYTE(longp){return(int)(p>>16);}

protectedoverridevoidWndProc(refMessagem){if(this.FormBorderStyle!=System.Windows.Forms.FormBorderStyle.None){switch(m.Msg){caseWM_NCPAINT:

DrawCaption(m.HWnd,Form.ActiveForm==this);return;caseWM_NCACTIVATE:

DrawCaption(m.HWnd,m.WParam.ToInt32()>0);return;caseWM_NCRBUTTONDOWN:{intposX,posY;

intwp=m.WParam.ToInt32();longlp=m.LParam.ToInt64();posX=LOBYTE(lp);posY=HIBYTE(lp);

if(wp==HTCAPTION){

Pointpt=this.PointToClient(newPoint(posX,posY));

if(this.CaptionContextMenu!=null){this.CaptionContextMenu.Show(posX,posY);return;}}

break;}caseWM_SETCURSOR:

if(this.ControlBox){intposX,posY;

intwp=m.WParam.ToInt32();longlp=m.LParam.ToInt64();

posX=LOBYTE(lp);posY=HIBYTE(lp);

BrushbackgroundColor=SolidBrush(CaptionBackgroundColor);

_NonClientSizeInfoncInfoGetNonClientInfo(m.HWnd);

IntPtrdc=GetWindowDC(m.HWnd);

new=

Graphicsg=Graphics.FromHdc(dc);

intcloseBtnPosX=ncInfo.CaptionRect.Left+ncInfo.CaptionRect.Width-ncInfo.BorderSize.Width-ncInfo.CaptionButtonSize.Width;

intmaxBtnPosX,minBtnPosX;maxBtnPosX=closeBtnPosX-ncInfo.CaptionButtonSiz