Nebula3 in CLR-优快云博客

本文分享了将Nebula3 (N3) 和 .Net CLR 结合用于界面开发的经验，包括解决命名空间冲突、链接错误及初始化问题的方法。

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有用N3 + CLR做界面的冲动

新建一个CLR WinForm工程, 直接引入N3的头文件和库进行编译........

编译不过, 找了半天才发现原因

晕死, .Net和N3都有个System命名空间, 没法改Microsoft的东西, 只好把N3的System改成了NSystem

然后就是链接不过

一是__fastcall不被CLR支持, 改成__cdecl (/Gd)重遍

二是Multi-threaded Debug (/MTd)跟/clr冲突, 改成Multi-threaded Debug DLL (/MDd)

终于链接过了.............

启动程序, Crash掉

拿着关键字就去问google, 没想到MSDN论坛上还真有解决方法(感谢我的先驱们, 我成功是了站在你们的"尸体"上)

原因是N3的对象系统在ImplementClass时定义了一些静态对象, 如果直接用CLR会导致不能正解地进行初始化

解决方案(引用原文):

WorkaroundSteps:
Intheprojectproperties:
1.SetLinker/Advanced/EntryPointto""(emptystring)
2.SetLinker/System/SubsystemtoNotSet
Step1:MakessurethattheCRTstartupcodeisinvoked.Thisisbecause,ifnoentrypointisspecified,thelinkerwillautomaticallyusemainCRTStartup,whichisdefinedintheCRTlibraries.mainCRTStartupwillmakesurethattheglobalobjectisinitializedcorrectly.
Step2:Makessurethatthelinkerwilllookforthesymbol“main”.Thelinkerlooksfor“main”becausemainCRTStartupcallsmain()initsbody.ThedefaultoptionforaWinformsapplicationisSubsystem:WindowsandthismakesthelinkerlookforWinMain().
Thanks
SaritaBafna
VisualC++team

测试程序:

//N3CLR.cpp:mainprojectfile. 

#include"stdafx.h" 

#include"MainForm.h" 

#include"stdneb.h" 

#include"core/coreserver.h" 

#include"io/ioserver.h" 

usingnamespaceN3CLR;
[STAThreadAttribute]

intmain(array<System::String^>^args)
{

//EnablingWindowsXPvisualeffectsbeforeanycontrolsarecreated 
Application::EnableVisualStyles();

Application::SetCompatibleTextRenderingDefault(false);
Ptr<Core::CoreServer>coreServer=Core::CoreServer::Create();
coreServer->Open();

n_printf("HelloCLR!");
coreServer->Close();
coreServer=NULL;

//Createthemainwindowandrunit 
Application::Run(gcnewMainForm());

return0;
}

如果想嵌入到WinForm中的话, 需要更改DisplayDevice中的hWnd,我的做法是把DisplayDevice创建的窗口做为WinForm的子窗口.

注意InputDevice需要最顶层的窗口句柄来创建:

//setthecooperativelevelofthedevice,we'refriendly 

//note:useWin32'sFindWindow()tofindourtoplevelwindowbecause 

//theDisplayDevicemayberunninginadifferentthread 

HWNDhWnd=FindWindow(NEBULA3_WINDOW_CLASS,NULL);

if(0==hWnd)
{
hWnd=DisplayDevice::Instance()->GetParentWnd();
}
n_assert(0!=hWnd);