ObjectARX动态添加AutoCAD传统下拉菜单入门篇(一)

ObjectARX动态添加传统下拉菜单入门篇 图文by edata  , 转载注明出处 http://www.cnblogs.com/edata

AutoCAD 添加传统下拉菜单有很多种方式，比较典型的就是制作菜单文件mnu文本，加载（下拉菜单有的可能需要写弹出代码才能添加到菜单栏才能显示，工具条加载就能显示)。

还有另外一种方式就是使用com接口来动态添加，而com接口的使用在objectARX编程中主要有两种应用方式，代码编写不同。

下面介绍的就是com接口的第二种方式，使用#import导入tlb类型库，这种方式不用加入额外的cpp文件。

以下参考arxdev.chm的相关章节完成 ，编程测试环境，vs2010+vs2008，AutoCAD2011。

图文开始：

此处的波浪线也是因为vs还未导入tlb类型库，编译后会将tlb导出一个tlh文件，就不会提示波浪线了

后记：com虽然可以动态添加菜单，但是现在的CAD菜单都是带有图标的，貌似这种动态不能实现。

篇幅有限，仅仅概述了com动态加载菜单的一种方式，该代码还有一些问题，如有机会，再详细介绍。

附源码一份

// (C) Copyright 2002-2007 by Autodesk, Inc.
//
// Permission to use, copy, modify, and distribute this software in
// object code form for any purpose and without fee is hereby granted,
// provided that the above copyright notice appears in all copies and
// that both that copyright notice and the limited warranty and
// restricted rights notice below appear in all supporting
// documentation.
//
// AUTODESK PROVIDES THIS PROGRAM "AS IS" AND WITH ALL FAULTS.
// AUTODESK SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTY OF
// MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE.  AUTODESK, INC.
// DOES NOT WARRANT THAT THE OPERATION OF THE PROGRAM WILL BE
// UNINTERRUPTED OR ERROR FREE.
//
// Use, duplication, or disclosure by the U.S. Government is subject to
// restrictions set forth in FAR 52.227-19 (Commercial Computer
// Software - Restricted Rights) and DFAR 252.227-7013(c)(1)(ii)
// (Rights in Technical Data and Computer Software), as applicable.
//

//-----------------------------------------------------------------------------
//----- acrxEntryPoint.cpp
//-----------------------------------------------------------------------------
#include "StdAfx.h"
#include "resource.h"

//-----------------------------------------------------------------------------
#define szRDS _RXST("sk_")

static bool bIsMenuLoaded = false;

#import "acax18ENU.tlb" no_implementation raw_interfaces_only named_guids

//-----------------------------------------------------------------------------
//----- ObjectARX EntryPoint
class CArxUseComCreateMenuApp : public AcRxArxApp {

public:
	CArxUseComCreateMenuApp () : AcRxArxApp () {}

	virtual AcRx::AppRetCode On_kInitAppMsg (void *pkt) {
		// TODO: Load dependencies here

		// You *must* call On_kInitAppMsg here
		AcRx::AppRetCode retCode =AcRxArxApp::On_kInitAppMsg (pkt) ;

		// TODO: Add your initialization code here

		return (retCode) ;
	}

	virtual AcRx::AppRetCode On_kUnloadAppMsg (void *pkt) {
		// TODO: Add your code here

		// You *must* call On_kUnloadAppMsg here
		AcRx::AppRetCode retCode =AcRxArxApp::On_kUnloadAppMsg (pkt) ;

		// TODO: Unload dependencies here

		return (retCode) ;
	}

	virtual void RegisterServerComponents () {
	}

	// - sk_ArxUseComCreateMenu.AdeskComMenu command (do not rename)
	static void sk_ArxUseComCreateMenuAdeskComMenu(void)
	{
		// Add your code for command sk_ArxUseComCreateMenu.AdeskComMenu here
		AutoCAD::IAcadApplication *pAcad;
		AutoCAD::IAcadMenuBar *pMenuBar;
		AutoCAD::IAcadMenuGroups *pMenuGroups;
		AutoCAD::IAcadMenuGroup *pMenuGroup;
		AutoCAD::IAcadPopupMenus *pPopUpMenus;
		AutoCAD::IAcadPopupMenu *pPopUpMenu;
		AutoCAD::IAcadPopupMenuItem *pPopUpMenuItem;
		HRESULT hr = NOERROR;
		LPUNKNOWN pUnk = NULL;
		LPDISPATCH pAcadDisp = acedGetIDispatch(TRUE);
		hr = pAcadDisp->QueryInterface(AutoCAD::IID_IAcadApplication,(void**)&pAcad);
		pAcadDisp->Release();
		if (FAILED(hr))
			return;
		pAcad->put_Visible(true);
		pAcad->get_MenuBar(&pMenuBar);
		pAcad->get_MenuGroups(&pMenuGroups);
		pAcad->Release();
		long numberOfMenus;
		pMenuBar->get_Count(&numberOfMenus);
		pMenuBar->Release();
		VARIANT index;
		VariantInit(&index);
		V_VT(&index) = VT_I4;
		V_I4(&index) = 0;
		pMenuGroups->Item(index, &pMenuGroup);
		pMenuGroups->Release();
		pMenuGroup->get_Menus(&pPopUpMenus);
		pMenuGroup->Release();
		WCHAR wstrMenuName[256];
		MultiByteToWideChar(CP_ACP, MB_PRECOMPOSED,  "AsdkComAccess", -1, wstrMenuName, 256);
		if (!bIsMenuLoaded)
		{
			pPopUpMenus->Add(wstrMenuName, &pPopUpMenu);
			if (pPopUpMenu != NULL)
			{
				pPopUpMenu->put_Name(wstrMenuName);
				WCHAR wstrMenuItemName[256];
				MultiByteToWideChar(CP_ACP, 0,"&Add A ComCircle",-1, wstrMenuItemName, 256);
				WCHAR wstrMenuItemMacro[256];
				MultiByteToWideChar(CP_ACP, 0, "AsdkComCircle ",-1, wstrMenuItemMacro, 256);
				VariantInit(&index); V_VT(&index) = VT_I4; V_I4(&index) = 0;
				pPopUpMenu->AddMenuItem(index, wstrMenuItemName,wstrMenuItemMacro, &pPopUpMenuItem);
				VariantInit(&index);
				V_VT(&index) = VT_I4;
				V_I4(&index) = 1;
				pPopUpMenu->AddSeparator(index, &pPopUpMenuItem);
				MultiByteToWideChar(CP_ACP, 0,"Auto&LISP Example", -1,wstrMenuItemName, 256);
				MultiByteToWideChar(CP_ACP, 0,"(prin1 \"Hello\") ", -1,wstrMenuItemMacro, 256);
				VariantInit(&index);
				V_VT(&index) = VT_I4;
				V_I4(&index) = 2;
				pPopUpMenu->AddMenuItem(index, wstrMenuItemName,wstrMenuItemMacro, &pPopUpMenuItem);
				VariantInit(&index);
				V_VT(&index) = VT_I4;
				V_I4(&index) = numberOfMenus - 2;
				pPopUpMenu->InsertInMenuBar(index);
				pPopUpMenu->Release();
				pPopUpMenuItem->Release();
				bIsMenuLoaded = true;
			}
			else
			{
				acutPrintf(_T("\nMenu not created."));
			}
		}
		else
		{
			VariantInit(&index);
			V_VT(&index) = VT_BSTR;
			V_BSTR(&index) = wstrMenuName;
			pPopUpMenus->RemoveMenuFromMenuBar(index);
			VariantClear(&index);
			bIsMenuLoaded = false;
		}
		pPopUpMenus->Release();
	}
} ;

//-----------------------------------------------------------------------------
IMPLEMENT_ARX_ENTRYPOINT(CArxUseComCreateMenuApp)

ACED_ARXCOMMAND_ENTRY_AUTO(CArxUseComCreateMenuApp, sk_ArxUseComCreateMenu, AdeskComMenu, ComMenu, ACRX_CMD_TRANSPARENT, NULL)