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最近需要做了菜单栏，替换多文档试图结构的菜单栏。最后需模拟一个，参照了网上的资料，完成了所需菜单栏，谢谢goodboyws在论坛的帖子， 展示如下： 首先在窗口的任意一个区域画出菜单的效果，这个区域我们称为菜单区，我们把每个菜单项在窗口中的位置保存下来
CRect m_rcMenu[3];
程序主要要处理三个消息: WM_LBUTTONDOWN、WM_MOUSEMOVE、WM_ENTERIDLE
BEGIN_MESSAGE_MAP(CMyDlg, CDialog)
//{{AFX_MSG_MAP(CMyDlg)
ON_WM_LBUTTONDOWN( )
ON_WM_MOUSEMOVE()
ON_WM_ENTERIDLE()
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
当鼠标在菜单区内按下的时候，开始用弹出菜单模拟窗口菜单。
void CMyDlg::OnLButtonDown(UINT nFlags, CPoint ptStart)
{
for (i=0 ;i<3; i++)
{
if (PtInRect(m_rcMenu[i], point))
{
if (!PtInRect(m_rcMenu[m_iMenuIndex], point))
{
InvalidateRect(&m_rcMenu[m_iMenuIndex], TRUE);
UpdateWindow();
}
//这个是菜单索引，用它来标示显示那个菜单
m_iMenuIndex = i;
m_bShowMenu = TRUE;
//菜单显示,如果m_bMenuContinue为TRUE, 不断显示新的菜单,旧的在WM_ENTERIDLE中清除，之所以做这样的处理，是因为窗口菜单要求当菜单弹出时，随着鼠标在菜单区的移动，菜单变更为相应的子菜单
do
{
//画菜单的按下效果
CDC* pDC = GetDC();
pDC->Draw3dRect(&m_rcMenu[m_iMenuIndex], RGB(100, 100, 100), RGB(160, 160, 160));
ReleaseDC(pDC);
m_bMenuContinue = FALSE;
ShowMenu();
} while(m_bMenuContinue);
InvalidateRect(&m_rcMenu[m_iMenuIndex], TRUE);
UpdateWindow();
m_bShowMenu = FALSE;
CWnd::OnLButtonDown(nFlags, point);
return;
}
}
if ( i== 3)
m_iMenuIndex = -1;
CDialog::OnLButtonDown(nFlags, point);
}
然后在OnMouseMove里更新菜单索引
void CMyDlg::OnMouseMove(UINT nFlags, CPoint point)
{
// TODO: Add your message handler code here and/or call default
//把原来的菜单按下效果清除掉
if (m_iMenuIndex != -1)
{
if (!PtInRect(m_rcMenu[m_iMenuIndex], point))
InvalidateRect(&m_rcMenu[m_iMenuIndex], TRUE);
}
UpdateWindow();
m_iMenuIndex = -1;
for (i=0 ;i<3; i++)
{
if (PtInRect(m_rcMenu[i], point))
{
//确定当前菜单索引
m_iMenuIndex = i;
//画菜单的抬起效果
CDC* pDC = GetDC();
pDC->Draw3dRect(&m_rcMenu[i], RGB(160, 160, 160), RGB(100, 100, 100));
ReleaseDC(pDC);
break;
}
}
CDialog::OnMouseMove(nFlags, point);
}
在OnEnterIdle将菜单取消并重新显示
void CGameBoxShell::OnEnterIdle(UINT nWhy, CWnd* pWho)
{
CWnd::OnEnterIdle(nWhy, pWho);
// TODO: Add your message handler code here
if (nWhy == MSGF_MENU)
{
if (!m_bShowMenu)
return;
CPoint point;
GetCursorPos(&point);
ScreenToClient(&point);
for (int i=0 ;i<3; i++)
{
if (PtInRect(m_rcMenu[i], point))
{
if (m_iMenuIndex != i)
{
if (m_iMenuIndex != -1)
{
if (!PtInRect(m_rcMenu[m_iMenuIndex], point))
{
InvalidateRect(&m_rcMenu[m_iMenuIndex], TRUE);
UpdateWindow();
}
}
m_iMenuIndex = i;
m_bMenuContinue = TRUE;
SendMessage(WM_CANCELMODE);
}
break;
}
}
}
}
最后,把显示菜单的代码补充完整
void CMyDlg::ShowMenu()
{
if (m_PopupMenu.GetSafeHmenu())
m_PopupMenu.DestroyMenu();
m_PopupMenu.LoadMenu(IDR_POPUP);
CMenu* pSub = m_PopupMenu.GetSubMenu(m_iMenuIndex);
CPoint pt(m_rcMenu[m_iMenuIndex].left, m_rcMenu[m_iMenuIndex].bottom+2);
ClientToScreen(&pt);
TrackPopupMenu(pSub->GetSafeHmenu(), TPM_LEFTALIGN |
TPM_LEFTBUTTON, pt.x, pt.y, NULL, m_hWnd, NULL);
}
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