c++ - 如何向父对话框通知按钮按下消息

我想为CButton子类化以处理ON_WM_LBUTTONDOWN消息。

DownButton.cpp:

#include "stdafx.h"
#include "DownButton.h"

//CDownButton

IMPLEMENT_DYNAMIC(CDownButton, CButton)

CDownButton::CDownButton()
{
}

CDownButton::~CDownButton()
{
}


BEGIN_MESSAGE_MAP(CDownButton, CButton)
    ON_WM_LBUTTONDOWN()
END_MESSAGE_MAP()



// CDownButton message handlers

void CDownButton::OnLButtonDown(UINT nFlags, CPoint point)
{
}

DownButton.h

#pragma once


// CDownButton

class CDownButton : public CButton
{
    DECLARE_DYNAMIC(CDownButton)

public:
    CDownButton();
    virtual ~CDownButton();

protected:
    DECLARE_MESSAGE_MAP()
public:
    afx_msg void OnLButtonDown(UINT nFlags, CPoint point);
};

但是如何通知包含此按钮的对话框呢？似乎唯一可以接收的消息是ON_BN_CLICKED。

最佳答案

您需要在OnLButtonDown-事件中将消息重新发送给父级:

void CDownButton::OnLButtonDown(UINT nFlags, CPoint point)
{
   // do what you want to do ...

   GetParent()->SendMessage(WM_COMMAND, GetDlgCtrlID() | WM_LBUTTONDOWN << 16, (LONG) GetSafeHwnd());
}

关于c++ - 如何向父对话框通知按钮按下消息，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/31704562/