MFC::菜单/光标

1.菜单

1.01 菜单栏

// 注册目录测试函数
ON_COMMAND(ID_INSERT_MENU, OnMenuTest)

void CMainFrame::OnMenuTest() 
{
	//获得主菜单
	CMenu* pMenu = GetMenu();
	//获得子菜单
	CMenu* pSubMenu = pMenu->GetSubMenu(4);

	if (pSubMenu->GetMenuItemCount() == 4)
	{
		//在菜单末端添加菜单项
		pSubMenu->AppendMenu(MF_STRING, ID_TEST_MENU, _T("New"));
	
		//在菜单指定位置添加菜单项
		//pSubMenu->InsertMenu(4, MF_BYPOSITION, ID_TEST_MENU, _T("add"));

		//移除菜单项
 		//pSubMenu->RemoveMenu(4, MF_BYPOSITION);
		
		//删除菜单项
 		//pSubMenu->DeleteMenu(4, MF_BYPOSITION);

		//重画菜单
		DrawMenuBar();
	}
}

void CMainFrame::OnUpdateTestMenu1(CCmdUI* pCmdUI) 
{
	//启用或禁用菜单1
	pCmdUI->Enable(m_bEnable1);	
}

void CMainFrame::OnUpdateTestMenu(CCmdUI* pCmdUI) 
{
	//设置菜单项检查状态
	pCmdUI->SetCheck(m_nCheck);	
}

1.02 右键菜单

//获得系统菜单
CMenu* pMenu = GetSystemMenu(FALSE);
if (pMenu)
{
	//删除系统菜单项
	pMenu->RemoveMenu(SC_MOVE, MF_STRING);

	//添加菜单项
	pMenu->InsertMenu(0, MF_BYPOSITION, ID_TEST_MENU,_T("测试菜单项"));

	//禁用关闭按钮
	pMenu->EnableMenuItem(SC_CLOSE, MF_BYCOMMAND | MF_GRAYED);

	//重画菜单
	DrawMenuBar();
}

1.03 获得光标坐标

void CDemoView::OnMouseMove(UINT nFlags, CPoint point) 
{
	//保存光标坐标
	m_Point	= point;

	//刷新客户区
	Invalidate();

	CView::OnMouseMove(nFlags, point);
}

void CDemoView::OnDraw(CDC* pDC)
{
	//获得客户区坐标
	CRect rect;
	GetClientRect(rect);

	//绘制十字光标
	pDC->MoveTo(0, m_Point.y);
	pDC->LineTo(rect.Width(), m_Point.y);
	pDC->MoveTo(m_Point.x, 0);
	pDC->LineTo(m_Point.x, rect.Height());

	//输出光标坐标
	CString strText = _T("");
	strText.Format(_T("%d, %d"), m_Point.x, m_Point.y);
	pDC->SetBkMode(TRANSPARENT);
	pDC->SetTextAlign(TA_RIGHT | TA_BOTTOM);
	pDC->TextOut(m_Point.x, m_Point.y, strText);
}

1.03 限制光标异动范围

void CDemoView::OnLButtonDown(UINT nFlags, CPoint point) 
{
	//获得客户区坐标
	CRect rect;
	GetClientRect(rect);

	rect.left = rect.left + rect.Width() / 4;
	rect.right = rect.right - rect.Width() / 4;
	rect.top = rect.top + rect.Height() / 4;
	rect.bottom = rect.bottom - rect.Height() / 4;

	//映射屏幕坐标
	ClientToScreen(rect);

	//限制光标移动范围
	ClipCursor(&rect);

	CView::OnLButtonDown(nFlags, point);
}

void CDemoView::OnLButtonUp(UINT nFlags, CPoint point) 
{
	//光标自由移动
	ClipCursor(NULL);

	CView::OnLButtonUp(nFlags, point);
}

1.04 预定义光标

OnCreate是在窗体创建时调用的。
OnInitialUpdate视图窗口完全建立后第一个被框架调用的函数。
// 定义光标对象
HCURSOR m_hCursor;
/* 初始化光标 */
void CDemoView::OnInitialUpdate()
{
	CView::OnInitialUpdate();
	//加载光标
	m_hCursor = AfxGetApp()->LoadStandardCursor(IDC_WAIT);
}
/* 添加SetCursor事件 */
BOOL CDemoView::OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message)
{
	//设置光标
	::SetCursor(m_hCursor);
	return TRUE;
	//return CView::OnSetCursor(pWnd, nHitTest, message);
}
/* 切换光标 */
void CDemoView::OnLButtonUp(UINT nFlags, CPoint point)
{
	//加载光标
	m_hCursor = AfxGetApp()->LoadStandardCursor(IDC_SIZENWSE);
	//设置光标
	::SetCursor(m_hCursor);
	CView::OnLButtonUp(nFlags, point);
}
void CDemoView::OnLButtonDown(UINT nFlags, CPoint point)
{
	//加载光标
	m_hCursor = AfxGetApp()->LoadStandardCursor(IDC_CROSS);
	//设置光标
	::SetCursor(m_hCursor);
	CView::OnLButtonDown(nFlags, point);
}

1.05 使用自定义光标

添加资源文件 Cursor1.cur
添加资源文件 Cursor2.cur
/* 切换光标 */
void CDemoView::OnLButtonUp(UINT nFlags, CPoint point)
{
	//加载光标
	m_hCursor = AfxGetApp()->LoadCursor(IDC_CURSOR1);
	//设置光标
	::SetCursor(m_hCursor);
	CView::OnLButtonDown(nFlags, point);
}
void CDemoView::OnLButtonDown(UINT nFlags, CPoint point)
{
//加载光标
	m_hCursor = AfxGetApp()->LoadCursor(IDC_CURSOR2);
	//设置光标
	::SetCursor(m_hCursor);
	CView::OnLButtonDown(nFlags, point);
}

1.06 设置光标等待

void CDemoView::OnLButtonDown(UINT nFlags, CPoint point) 
{
	//启动等待光标
	BeginWaitCursor();
	//休眠
	Sleep(5000);
	//结束等待光标
	EndWaitCursor();
	CView::OnLButtonDown(nFlags, point);
}