ToolTips

[barehawk]

如何在CView的派生类里面实现Tips功能,也就是说象VC的编辑环境那样,当鼠标移动到某个单次上时有提示信息,多谢各位，拜托！

[glhorse]

可能比较麻烦。

[xglcm]

他那个是钩子吧

[han012]

1)在CView的派生类里定义一个CToolTipCtrl成员变量
2)在CView的派生类的OnCreate()函数中创建ToolTip窗口
int CMyView::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
if (CView::OnCreate(lpCreateStruct) == -1)
return -1;

//if(EnableToolTip())
{
// create tooltip window
m_tooltip.Create(this);

RECT rect;
GetClientRect(&rect);
m_tooltip.AddTool(this, LPSTR_TEXTCALLBACK, &rect, 1);
}
return 0;
}
3)在BOOL CMyView::PreTranslateMessage(MSG* pMsg) 中forward mouse message
{
// if(EnableToolTip())
{
switch(pMsg->message){
case WM_MOUSEMOVE:
case WM_LBUTTONDOWN:
case WM_LBUTTONUP:
case WM_MBUTTONDOWN:
case WM_MBUTTONUP:
case WM_RBUTTONDOWN:
case WM_RBUTTONUP:
m_tooltip.RelayEvent(pMsg);
break;
}
}
return CView::PreTranslateMessage(pMsg);
}
4)在void CMyView::OnMouseMove(UINT nFlags, CPoint point)中进行
HitTest,tooltip窗口的显示/更新等操作,这一步比较复杂,要具体要求具体分析
5)完成tooltip的消息响应函数,针对消息TTN_NEEDTEXTW,TTN_NEEDTEXTA
BEGIN_MESSAGE_MAP(CMyView, CView)
//{{AFX_MSG_MAP(CMyView)
ON_WM_CREATE()
ON_WM_MOUSEMOVE()
ON_NOTIFY_EX(TTN_NEEDTEXTW,0,OnToolTipText)
ON_NOTIFY_EX(TTN_NEEDTEXT,0,OnToolTipText)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()

BOOL CMyView::OnToolTipText(UINT nID, NMHDR* pNMHDR, LRESULT* pResult)


关于Tooltip的使用请参见MSDN(有详细的例子):

The CToolTipCtrl class encapsulates the functionality of a “tool tip control,” a small pop-up window that displays a single line of text describing the purpose of a tool in an application. A “tool” is either a window, such as a child window or control, or an application-defined rectangular area within a window’s client area. A tool tip is hidden most of the time, appearing only when the user puts the cursor on a tool and leaves it there for approximately one-half second. The tool tip appears near the cursor and disappears when the user clicks a mouse button or moves the cursor off the tool.

CToolTipCtrl provides the functionality to control the initial time and duration of the tool tip, the margin widths surrounding the tool tip text, the width of the tool tip window itself, and the background and text color of the tool tip. A single tool tip control can provide information for more than one tool.

The CToolTipCtrl class provides the functionality of the Windows common tool tip control. This control (and therefore the CToolTipCtrl class) is available only to programs running under Windows 95 and Windows NT versions 3.51 and later.

For more information about enabling tool tips, seeTool Tips in Visual C++ Programmer’s Guide.

For more information on using CToolTipCtrl, seeControl Topics andUsing CToolTipCtrl in the Visual C++ Programmer’s Guide.

[barehawk]

to 啊毛
谢谢你!