C ++ / CLI：将MFC嵌入WinForm

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您好，

几个星期以来，我们试图将MFC对话框转换为可以嵌入到WinForm用户控件中的 MFC表单 。

Since a few weeks, we are trying to "transform" a MFC dialog into a "MFC form" which can be embedded into a WinForm User Control.

我们成功做到了：

• 我们制作了WinForm用户控件，称为 Dlg_WU_MFC_Container
• 创建后，UC会创建名为 CDlgEdgeType
• 然后，每次调整UC大小或移动UC时，我们也会移动并调整MFC表单的大小

下面是代码（试图删除很多不必要的东西..）：

Here is the code (I tried to remove a lot of unnecessary stuff..):

Dlg_WU_MFC_Container.h：

Dlg_WU_MFC_Container.h:

#pragma once public ref class Dlg_WU_MFC_Container : public System::Windows::Forms::UserControl { private: CDlgEdgeType* _dialog; CWnd *_wnd; private: //---Local Controls System::ComponentModel::IContainer^ components; public: Dlg_WU_MFC_Container(); ~Dlg_WU_MFC_Container(); !Dlg_WU_MFC_Container(); template<class T, class HP> void InitializeContainer() { CDlgEdgeType = } private: void RefreshEmbeddedSize(); #pragma region Windows Form Designer generated code /// <summary> /// Required method for Designer support - do not modify /// the contents of this method with the code editor. /// </summary> void InitializeComponent(void) { this->SuspendLayout(); // // Dlg_WU_MFC_Container // this->AutoScaleDimensions = System::Drawing::SizeF(96, 96); this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Dpi; this->ForeColor = System::Drawing::SystemColors::WindowText; this->Margin = System::Windows::Forms::Padding(0); this->Name = L"Dlg_WU_MFC_Container"; this->Size = System::Drawing::Size(816, 480); this->SizeChanged += gcnew System::EventHandler(this, &Dlg_WU_MFC_Container::evSizeChanged); this->VisibleChanged += gcnew System::EventHandler(this, &Dlg_WU_MFC_Container::evVisibleChanged); this->ResumeLayout(false); } #pragma endregion private: System::Void evSizeChanged(System::Object^ sender, System::EventArgs^ e); private: System::Void evVisibleChanged(System::Object^ sender, System::EventArgs^ e); };

Dlg_WU_MFC_Container.cpp：

Dlg_WU_MFC_Container.cpp:

#include "Dlg_WU_MFC_Container.h" #include "DlgEdgeType.h" Dlg_WU_MFC_Container::Dlg_WU_MFC_Container() { InitializeComponent(); _wnd = NULL; _dialog = new CDlgEdgeType(); } Dlg_WU_MFC_Container::~Dlg_WU_MFC_Container() { if (components) { delete components; } this->!Dlg_WU_MFC_Container(); } Dlg_WU_MFC_Container::!Dlg_WU_MFC_Container() { // We need to detach the handle to free it for other usage if (_wnd) { _wnd->Detach(); delete _wnd; _wnd = NULL; } if (_dialog) { delete _dialog; _dialog = NULL; } } System::Void Dlg_WU_MFC_Container::evSizeChanged(System::Object^ sender, System::EventArgs^ e) { RefreshEmbeddedSize(); } // Inform the embedded form to adapt to its new size void Dlg_WU_MFC_Container::RefreshEmbeddedSize() { if (_dialog && _isShown) { CRect containerWnd; containerWnd.left = this->Left; containerWnd.right = this->Right; containerWnd.top = this->Top; containerWnd.bottom = this->Bottom; _dialog->ReplaceEmbeddedForm(containerWnd); } } System::Void Dlg_WU_MFC_Container::evVisibleChanged(System::Object^ sender, System::EventArgs^ e) { // _isShown basically useless.. ! if (Visible != _isShown) { _isShown = Visible; if (_dialog) { if (Visible) { void *handle = Handle.ToPointer(); if (handle) { // We need to create a new CWnd which will contain // the handle of the current WinForm control where // the embedded MFC will be contained _wnd = new CWnd(); _wnd->Attach((HWND)handle); _dialog->Create(_wnd); RefreshEmbeddedSize(); } } else { // When the control is not shown anymore, we need to free // the handle so another control can use it (the handle // is stored in the MFC permanent map) _wnd->Detach(); _dialog->DestroyWindow(); delete _wnd; _wnd = NULL; } } } }

CDlgEdgeType .cpp：

CDlgEdgeType.cpp:

void CDlgEdgeType::ReplaceEmbeddedForm(CRect &rect) { if (!GetSafeHwnd()) { return; } SetWindowPos(NULL, rect.left, rect.top, rect.Width(), rect.Height(), SWP_NOMOVE | SWP_NOACTIVATE | SWP_NOZORDER); }

这些东西很棒： CDlgEdgeType 可以很好地显示在我们的应用程序中，并且在调整应用程序大小或移动应用程序时，一切正常。

This stuff is working "great" : CDlgEdgeType is well shown in our application and when the application is resized or moved, everything goes well.

这是我的问题： CDlgEdgeType 具有 Dlg_WU_MFC_Container 作为父级，太好了。但是后者不知道MFC表单是子级 ..因此焦点有点丢失，箭头键和Tab键根本不起作用。

Here is my issue: CDlgEdgeType has Dlg_WU_MFC_Container as parent, great. But the latter doesn't know that the MFC form is a "child".. so the focus is kind of lost and the Arrow keys and the Tab keys simply do not work.

您应该知道的是，已将 Dlg_WU_MFC_Container 添加到自定义 TabControl 的 TabPages 中。因此，如果用户尝试通过MFC窗体的控件进行导航，或者他尝试使用方向键通过TreeView进行导航，则TabControl似乎将接管焦点并更改选项卡。.这不方便D：

A thing you should know is that Dlg_WU_MFC_Container is added to TabPages of a custom TabControl. So, if the user tries to navigate through MFC form's controls or he tries to navigate through a TreeView with the Arrow keys, the TabControl seems to take over the focus and will change tab.. which is not convenient D:

我也不知道如何解决这个问题，我的同事们也不知道。

I have no idea how to solve that issue, neither my colleagues.

也许我们集成MFC的方式是错误的，但是没有真正的话题（我们看到更多将WinForm表单嵌入MFC）。另外，由于我们的软件历史悠久，因此我们不能简单地重新创建CDlgEdgeType。这是一个很大的对话框，实际上，我们有7个这样的对话框，代码实现了模板，但是为了清楚起见，我删除了它们。.

Maybe the way we integrate the MFC is wrong, but there are no really topics about that (we see more "Embedding WinForm forms into MFC"..). Also, as our software has a big history, we cannot simply recreate CDlgEdgeType. It's a big dialog and, in fact, we have 7 dialogs like that, the code implements template but I removed them for the clarity of this message..

谢谢！

Sbizz。

推荐答案

好吧，我们找到了出路。

Well, we find a way out.. this may not be the best way to do it, but it is working (or at least, it seems to work !).

起初，我已经设法做到这一点。将键发送到MFC表单：

At first, I've managed to send the keys to the MFC form:

bool Dlg_WU_MFC_Container::ProcessDialogKey(Keys keyData) { ::SendMessage(CWnd::GetFocus()->GetSafeHwnd(), WM_KEYDOWN, (WPARAM)keyData, (LPARAM)0); return true; }

由于TabControl正在通过WM_ACTIVATE进行控制，因此我们试图覆盖，同时将WM_ACTIVATE发送到MFC表单，因此结果如下：

Since the TabControl is taking the control through an WM_ACTIVATE, we tried to "override" it by sending also WM_ACTIVATE to the MFC form, so the result is the following:

bool Dlg_WU_MFC_Container::ProcessDialogKey(Keys keyData) { ::SendMessage(CWnd::GetFocus()->GetSafeHwnd(), WM_ACTIVATE, MAKEWPARAM(WA_ACTIVE, 0), (LPARAM)0); ::SendMessage(CWnd::GetFocus()->GetSafeHwnd(), WM_KEYDOWN, (WPARAM)keyData, (LPARAM)0); return true; }

唯一的问题是 Tab键似乎不起作用但是经过调查，我们的用户并不需要它，所以...：D但是我认为它仅与WM_ACTIVATE（先前的控件）的第三个参数有关。必须使用它来知道在按下Tab后必须聚焦哪个控件。

The only thing is that the "Tab" key doesn't seems to work but after investigation, it is not needed by our users, so... :D But I think it's just related to the third parameter of WM_ACTIVATE (previous control). It must be used to know which control must be focused after Tab is pressed.

Sbizz