在CComboBox的编辑控件中检测键盘热键 [英] Detect keyboard hotkey inside edit control of CComboBox

问题描述

我有此代码:

BOOL CChristianLifeMinistryStudentMaterialDlg::PreTranslateMessage(MSG* pMsg)
{
    BOOL    bNoDispatch, bDealtWith;

    bDealtWith = FALSE;

    if (IsCTRLpressed() &&
        pMsg->message == WM_KEYDOWN && pMsg->wParam == _TINT(_T('I')))
    {
        if (EncodeText(pMsg->hwnd, _T("i")))
        {
            // Eat it.
            bNoDispatch = TRUE;
            bDealtWith = TRUE;
        }
    }
    else if (IsCTRLpressed() &&
        pMsg->message == WM_KEYDOWN && pMsg->wParam == _TINT(_T('B')))
    {
        if (EncodeText(pMsg->hwnd, _T("b")))
        {
            // Eat it.
            bNoDispatch = TRUE;
            bDealtWith = TRUE;
        }
    }

    if (!bDealtWith)
        bNoDispatch = CDialogEx::PreTranslateMessage(pMsg);

    return bNoDispatch;
}

最初，我的对话框中有3个CEdit控件.当您按下此键时，它会对编辑控件中的选择执行上述操作.

Originally, I had 3 CEdit controls on my dialog. When you used this key press it performed an action as above on the selection in the edit controls.

我将控件从CEdit更改为CComboBox.它们是可编辑的类型.我将EncodeText调整为使用GetEditSel和SetEditSel.

I changed the controls from CEdit to CComboBox. They are editable type. I adjusted EncodeText to use GetEditSel and SetEditSel.

现在唯一的问题是当我在组合框中编辑文本时.我选择了一些文本，然后按CTRL + I，但是什么也没有发生.我的对话框的PTM未被拦截.

Only problem is now when I am editing text in the combo box. I select some of the text and press CTRL + I and nothing happens. The PTM of my dialog is not getting intercepted.

在此CEdit控件中，我可以选择文本:

In this CEdit control I can select text:

然后我使用其中一个热键，例如: CTRL + B ，它仍然有效:

Then I use one of the hot keys, eg: CTRL + B and it still works:

但是，当我在可编辑的CComboBox中选择一些文本并使用相同的热键时:

But, when I select some text in the editable CComboBox and use the same hot key:

在这种情况下，它不起作用.

In this case it is not working.

我认为这是因为从技术上讲，我位于组合的嵌入式编辑"控件中.既然我正在组合框中使用选定的文本，如何仍然检测热键?

I have assumed it is because technically I am inside a embedded "Edit" control of the combo. How do I still detect the hot keys now that I am using selected text inside a combo?

推荐答案

我最终创建了一个新类CEncodedCombBox，它是从CComboBox派生的，像这样:

I ended up creating a new class CEncodedCombBox, derived from CComboBox, like this:

// EncodedComboBox.cpp : implementation file
//

#include "stdafx.h"
#include "Meeting Schedule Assistant.h"
#include "EncodedComboBox.h"


// CEncodedComboBox

IMPLEMENT_DYNAMIC(CEncodedComboBox, CComboBox)

CEncodedComboBox::CEncodedComboBox()
{

}

CEncodedComboBox::~CEncodedComboBox()
{
}


BEGIN_MESSAGE_MAP(CEncodedComboBox, CComboBox)
END_MESSAGE_MAP()



// CEncodedComboBox message handlers


BOOL CEncodedComboBox::PreTranslateMessage(MSG* pMsg)
{
    BOOL    bNoDispatch, bDealtWith;
    DWORD   dwSel = GetEditSel();
    CString strCode = _T(""), strText;

    GetWindowText(strText);

    bDealtWith = FALSE;

    if (IsCTRLpressed() &&
        pMsg->message == WM_KEYDOWN && pMsg->wParam == _TINT(_T('I')))
    {
        strCode = _T("i");

        bNoDispatch = TRUE;
        bDealtWith = TRUE;
    }
    else if (IsCTRLpressed() &&
        pMsg->message == WM_KEYDOWN && pMsg->wParam == _TINT(_T('B')))
    {
        strCode = _T("b");

        bNoDispatch = TRUE;
        bDealtWith = TRUE;
    }

    if (bDealtWith)
    {
        CMeetingScheduleAssistantApp::EncodeText(strText, strCode, LOWORD(dwSel), HIWORD(dwSel));
        SetWindowText(strText);
        SetEditSel(HIWORD(dwSel) + 7, HIWORD(dwSel) + 7);
    }

    if (!bDealtWith)
        bNoDispatch = CComboBox::PreTranslateMessage(pMsg);

    return bNoDispatch;
}

如您所见，它包含一个PreTranslateMessage并且有效:

As you can see, it includes a PreTranslateMessage and it works:

如果有更好的方法，那么我欢迎您的评论或回答.

If there is a better way then I welcome your comments or answer.

我必须针对编辑控件句柄进行测试，而不必为自己的CDialog工作而使用组合框句柄:

I had to test against the edit control handle and not to combo box handle for my own CDialog to work:

if (::GetParent(hWnd) == m_cbMaterialAssignment1.GetSafeHwnd())

不再需要派生的组合类.

No derived combo class needed any more.

这篇关于在CComboBox的编辑控件中检测键盘热键的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！