我的YUV播放器MFC小笔记：右键菜单事件和非标题实现鼠标拖动

鼠标右键弹出菜单代码如下：

// 右键菜单
void CYUVPlayerDlg::OnContextMenu(CWnd* pWnd, CPoint point)
{
// TODO: Add your message handler code here
CMenu popMenu;
CMenu *pPopup;
popMenu.LoadMenu(IDR_MENU2);

pPopup=popMenu.GetSubMenu(0);

pPopup->EnableMenuItem(ID_R_OPEN, MF_BYCOMMAND|MF_ENABLED);
pPopup->EnableMenuItem(ID_R_SETTING, MF_BYCOMMAND|MF_ENABLED);
pPopup->EnableMenuItem(ID_R_EXIT, MF_BYCOMMAND|MF_ENABLED);

//pPopup->EnableMenuItem(ID_R_SETTING,MF_BYCOMMAND|MF_DISABLED|MF_GRAYED);
pPopup->TrackPopupMenu(TPM_LEFTALIGN|TPM_RIGHTBUTTON, point.x,point.y, this);
pPopup->Detach();
popMenu.DestroyMenu();
}

其中IDR_MENU2为右键菜单ID。

一般的窗口，只有标题处才可用鼠标拖动，下面代码实现了非标题也可用鼠标拖动。实质上响应OnNcHitTest事件，代码如下：

// 实现非标题也可用鼠标拖动
LRESULT CYUVPlayerDlg::OnNcHitTest(CPoint point)
{
UINT nHitTest = CDialogEx::OnNcHitTest(point);
if ((nHitTest == HTCLIENT) && (::GetAsyncKeyState (MK_LBUTTON) < 0))
nHitTest = HTCAPTION;
return nHitTest;
//return CDialogEx::OnNcHitTest(point); // not this....
}

2015.8.15晚