C++编写PowerPoint插件（四）：集成DuiLib

本系列描述的是如何使用C++/COM来编写PowerPoint插件，使用的开发工具是 Visual Studio 2017。

Step 1：工程中引入DuiLib

将编译好的duilib（包括头文件、lib、dll）拷贝到工程所在目录下
右键NativePPTAddin工程节点，属性->VC++目录->包含目录和库目录中加入duilib所在目录，加入后大概长这样：

build-cplusplus-addin-for-ppt-18.png

由于Duilib的头文件中包含了StdAfx.h，如果工程中没有这个文件，需要新建一个，留空白即可

在pch.h中引入DuiLib

#include "UIlib.h"
using namespace DuiLib;
#ifdef _DEBUG
#   ifdef _UNICODE
#       pragma comment(lib, "DuiLib_d.lib")
#   else
#       pragma comment(lib, "DuiLibA_d.lib")
#   endif
#else
#   ifdef _UNICODE
#       pragma comment(lib, "DuiLib.lib")
#   else
#       pragma comment(lib, "DuiLibA.lib")
#   endif
#endif

Step 2：添加DuiLib的XML界面到资源

我们以登录框为例，添加一个XML到当前工程，取名叫LoginDialog.xml

将LoginDialog.xml导入到资源中，资源类型为DUILIB

<?xml version="1.0" encoding="utf-8" ?>
<Window size="400,320" caption="0,0,0,60" bktrans="true">
  <VerticalLayout>
    <HorizontalLayout height="52" bkcolor="#FF0288D1">
      <Label text="登录测试框" textcolor="0xFFFFFFFF" padding="20,0,0,0" font="1" />
      <Control />
      <Button name="minBtn" width="10" height="10" padding="0,21,20,0" normalimage="images\minimize.png" />
      <Button name="closeBtn" width="10" height="10" padding="0,21,20,0" normalimage="images\close.png" />
    </HorizontalLayout>
    <VerticalLayout bkcolor="0xFFFFFFFF">
      <Edit name="usernameEdit" height="48" font="3" padding="20,30,20,0" bordercolor="0xFF808080" bottombordersize="1" />
      <Edit name="passwordEdit" height="48" password="true" font="3" padding="20,20,20,0" bordercolor="0xFF808080" bottombordersize="1" />
      <Button name="loginBtn" text="登   录" height="50" bkcolor="#FF0277BD" textcolor="0xFFFFFFFF" font="2" padding="20,40,20,0" />
    </VerticalLayout>
  </VerticalLayout>
</Window>

添加资源后，资源列表大概长这样：

build-cplusplus-addin-for-ppt-19.png

Step 3：C++实现LoginDialog

在NativePPTAddin工程节点，添加->新建项，选择"C++类"

build-cplusplus-addin-for-ppt-20.png

修改LoginDialog类，让它继承自WindowImplBase
```
class LoginDialog : public WindowImplBase
```

实现基类WindowImplBase的几个虚函数

DuiLib::CDuiString LoginDialog::GetSkinType()
{
    return _T("DUILIB");
}

CDuiString LoginDialog::GetSkinFile()
{
    DuiLib::CDuiString dsResID;
    dsResID.Format(_T("%d"), IDR_DUILIB_LOGIN);
    return dsResID;
}

这表示LoginDialog将从资源中获取界面，资源类型为DUILIB，资源ID为IDR_DUILIB_LOGIN。

再简单实现最小化、关闭、登录按钮的事件处理

DUI_BEGIN_MESSAGE_MAP(LoginDialog, WindowImplBase)
DUI_ON_MSGTYPE_CTRNAME(DUI_MSGTYPE_CLICK, _T("closeBtn"), onCloseBtnClick)
DUI_ON_MSGTYPE_CTRNAME(DUI_MSGTYPE_CLICK, _T("minBtn"), onMinBtnClick)
DUI_ON_MSGTYPE_CTRNAME(DUI_MSGTYPE_CLICK, _T("loginBtn"), onLoginBtnClick)
DUI_END_MESSAGE_MAP()
    
void LoginDialog::onCloseBtnClick(TNotifyUI & msg)
{
    CWindowWnd::SendMessage(WM_CLOSE);
}

void LoginDialog::onMinBtnClick(TNotifyUI & msg)
{
    CWindowWnd::SendMessage(WM_SYSCOMMAND, SC_MINIMIZE, 0);
}

void LoginDialog::onLoginBtnClick(TNotifyUI & msg)
{
    CEditUI *usernameEdit = static_cast<CEditUI *>(m_pm.FindControl(_T("usernameEdit")));
    CEditUI *passwordEdit = static_cast<CEditUI *>(m_pm.FindControl(_T("passwordEdit")));
    if (usernameEdit == nullptr || passwordEdit == nullptr)
        return;
    TCHAR tmp[1024] = { 0 };
    swprintf_s(tmp, _T("您输入的用户名是 %s, 密码是 %s"), usernameEdit->GetText().GetData(), passwordEdit->GetText().GetData());
    ::MessageBox(m_hWnd, tmp, _T("提示"), MB_OK);
}

Step 4：添加获取应用实例和窗口句柄的全局变量

在dllmain.cpp中定义全局变量
```
HINSTANCE g_hInstance;
```
在pch.h中添加一个extern声明
```
extern HINSTANCE g_hInstance;
```

修改DllMain入口函数，给g_hInstance赋值

extern "C" BOOL WINAPI DllMain(HINSTANCE hInstance, DWORD dwReason, LPVOID lpReserved)
{
    g_hInstance = hInstance;
 return _AtlModule.DllMain(dwReason, lpReserved);
}

在dllmain.cpp再定义一个全局变量，表示PowerPoint的窗口句柄

我们可以通过GetCurrentProcessId拿到当前进程ID，再用EnumWindows枚举窗口，结合GetWindowThreadProcessId拿到PowerPoint的窗口句柄。

struct _TempHandleData {
    unsigned long processId;
    HWND windowHandle;
};

BOOL isMainWindow(HWND handle)
{
    return ::GetWindow(handle, GW_OWNER) == (HWND)0 && ::IsWindowVisible(handle);
}

BOOL CALLBACK enumWindowsCallback(HWND handle, LPARAM lParam)
{
    _TempHandleData& data = *(_TempHandleData*)lParam;
    unsigned long process_id = 0;
    ::GetWindowThreadProcessId(handle, &process_id);
    if (data.processId != process_id || !isMainWindow(handle))
        return TRUE;
    data.windowHandle = handle;
    return FALSE;
}

HWND GetMainWindow(unsigned long process_id)
{
    _TempHandleData data;
    data.processId = process_id;
    data.windowHandle = 0;
    ::EnumWindows(enumWindowsCallback, (LPARAM)&data);
    return data.windowHandle;
}

extern "C" BOOL WINAPI DllMain(HINSTANCE hInstance, DWORD dwReason, LPVOID lpReserved)
{
    g_hInstance = hInstance;
    g_hWnd = GetMainWindow(::GetCurrentProcessId());
    return _AtlModule.DllMain(dwReason, lpReserved);
}

Step 5：在Connect中添加弹出对话框的处理

将Connect.cpp中原登录按钮的代码删除

添加弹出登录对话框的函数

void ShowLoginDialog()
{
    DuiLib::CPaintManagerUI::SetInstance(g_hInstance);
    TCHAR szPath[MAX_PATH] = { 0 };
    GetModuleFileName(g_hInstance, szPath, _countof(szPath));
    *_tcsrchr(szPath, _T('\\')) = 0;
    DuiLib::CPaintManagerUI::SetResourcePath(szPath);
    LoginDialog dialog;
    dialog.Create(g_hWnd, _T("登录"), UI_WNDSTYLE_FRAME, WS_EX_WINDOWEDGE);
    dialog.CenterWindow();
    dialog.ShowModal();
}

重新实现Connect的ButtonClicked

STDMETHODIMP_(HRESULT __stdcall) CConnect::ButtonClicked(IDispatch * control)
{
    CComQIPtr<IRibbonControl> ribbonCtl(control);
    CComBSTR idStr;
    if (ribbonCtl->get_Id(&idStr) != S_OK)
        return S_FALSE;
    if (idStr == OLESTR("loginButton")) {
        ShowLoginDialog();
    } else if (idStr == OLESTR("uploadButton")) {
        WCHAR msg[64];
        swprintf_s(msg, L"I am uploadButton");
        MessageBoxW(NULL, msg, L"NativePPTAddin", MB_OK);
    }
    return S_OK;
}

启动调试，点击登录后，大概长这样：

build-cplusplus-addin-for-ppt-21.png

下一篇我们将介绍如何部署。

完整的代码在这里。

C++编写PowerPoint插件（四）：集成DuiLib

C++编写PowerPoint插件（四）：集成DuiLib

Step 1：工程中引入DuiLib

Step 2：添加DuiLib的XML界面到资源

Step 3：C++实现LoginDialog

Step 4：添加获取应用实例和窗口句柄的全局变量

Step 5：在Connect中添加弹出对话框的处理

Reference

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