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LingosHook：Plugins under wxWidget


    这几天一直在被Plugins折腾，用老办法用wxWidget实现插件方式一直都失败，主要是在DLL中创建的窗口无法获得Application Instance，导致窗口弹出时，直接CORE，很是苦恼。。。后来尝试将主窗口的Instance和Window作为参数传给DLL中的窗口，弹出没有问题，但当窗口关闭是，也会引起主窗口关闭，怀疑是公用消息队列所致，又是苦恼了几天～
    好在现在世界无限大，找来找去，还真发现早有前辈实现了这些，啥也不管了，COPY & PASTE 先，爸爸说的好－－“天下文人是一家”，我觉得程序员亦是如此。。。
    原帖在这，敬请移步－－http://wxforum.shadonet.com/viewtopic.php?t=13178&highlight=plugin

    虽还没有太弄懂其原理，但大体看原帖应该也碰到了和我一样的问题。所以其在DLL创建窗口前，先初始了一个App来接管或者封装住后面的窗口。实在是高人，至少我没有想到这样，用到的那些函数也从没见过，实在是高啊。。。这里我还有些糊涂，此时DLL中的窗口运行在哪个进程中？我还不想在LingosHook中引入锁。。。

    下面是主要的，也是重要的代码。
#ifndef __EXPORTS_H__
#define __EXPORTS_H__

//http://wxforum.shadonet.com/viewtopic.php?t=13178&highlight=plugin

#include "wx/wx.h"
#include "wx/msw/private.h"

#define IMPLEMENT_PLUGIN(name)                                                              \
    extern "C" __declspec(dllexport) ActivityObject* GetActivity() { return new name; }     \
                                                                                            \
    class name##DLLApp : public wxApp                                                       \
    {                                                                                       \
    };                                                                                      \
    IMPLEMENT_APP_NO_MAIN(name##DLLApp)                                                     \
                                                                                            \
    BOOL APIENTRY DllMain(HANDLE hModule, DWORD uCallReason, LPVOID pReserved)              \
    {                                                                                       \
        switch(uCallReason)                                                                 \
        {                                                                                   \
        case DLL_PROCESS_ATTACH:                                                            \
            {                                                                               \
                wxSetInstance((HINSTANCE)hModule);                                          \
                int argc = 0; char* argv = NULL;                                            \
                wxEntryStart(argc, &argv);                                                  \
                return TRUE;                                                                \
            }                                                                               \
            break;                                                                          \
        case DLL_THREAD_ATTACH:                                                             \
            break;                                                                          \
        case DLL_THREAD_DETACH:                                                             \
            break;                                                                          \
        case DLL_PROCESS_DETACH:                                                            \
            wxEntryCleanup();                                                                \
            break;                                                                          \
        default:                                                                            \
            return FALSE;                                                                   \
        };                                                                                  \
                                                                                            \
        return TRUE;                                                                        \
    }                                                                                       \
    

#endif

    上面代码被我去掉了几行，没别的意思，只是感觉么什么用处，当然也可能自己道行还不够，没体会到其中奥秘。不过去掉了还是能正常使用，如下图。有兴趣的，请去看原帖。




<---- 蛋疼的分割线---->

    知道啥叫‘蛋疼’不。。。为了搞定这个Plugins，特意写了Test工程。。。搞死我了。。。

posted on 2011-01-07 18:39 codejie 阅读(1670) 评论(0)  编辑 收藏 引用 所属分类: C++ 、LingosHook


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