如何在不绑定工具的情况下使用Windows ToolTip Control [英] How to use Windows ToolTip Control without bounding to a tool
问题描述
我想使用本机Windows工具提示控件（纯Win32 API，没有MFC的东西）。
I want to use the native windows tooltip control (pure Win32 API, no MFC stuff).
我读了doc，看来我必须发送TTM_ADDTOOL消息将工具绑定到工具提示控件。只有在那之后，我可以发送TTM_TRACKACTIVATE& TTM_TRACKPOSITION以显示工具提示。
I read the doc, it seems that I have to send a TTM_ADDTOOL message to bond a tool to the tooltip control. Only after that can I send TTM_TRACKACTIVATE & TTM_TRACKPOSITION to show the tooltip.
但我想在任何我想要的地方显示工具提示。例如，当鼠标悬停在我窗口的一个区域上时。这个区域在Windows眼中不是一个工具，它只是我窗口中的一个区域。
But I want to display the tooltip anywhere I want it to be. For example, when the mouse hovers over a region of my window. This region is not a tool in the eye of Windows, it's just a region in my window.
也许我可以将窗口绑定到工具提示控件，但是，这意味着我必须将每个窗口绑定到工具提示控件？
Perhaps I can bond the window to the tooltip control, but, doesn't this mean that I have to bond every window I created to the tooltip control?
有一个简单的解决方案，所以我不必发送TTM_ADDTOOL消息为每个窗口？
Is there an easy solution so that I don't have to send TTM_ADDTOOL messages for every window?
我实际上已经写了一些代码，但工具提示没有出现。安德斯的答案实际上解决了一些问题。
I actually have written some code, but the tooltip just doesn't appear. Anders' answer solves some questions actually. And after I poke around my code, I make it work.
如果有人想知道它的工作原理：
In case someone wants to know how it work:
HWND toolTipWnd = ::CreateWindowExW(WS_EX_TOPMOST,
TOOLTIPS_CLASSW,0,WS_POPUP | TTS_NOPREFIX | TTS_ALWAYSTIP,
CW_USEDEFAULT, CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,
0,0,appHandle,0);
TOOLINFOW ti = {};
ti.cbSize = sizeof(TOOLINFOW);
ti.uFlags = TTF_ABSOLUTE | TTF_IDISHWND /* | TTF_TRACK */; // Don't specify TTF_TRACK here. Otherwise the tooltip won't show up.
ti.hwnd = toolTipWnd; // By doing this, you don't have to create another window.
ti.hinst = NULL;
ti.uId = (UINT)toolTipWnd;
ti.lpszText = L"";
::SendMessageW(toolTipWnd, TTM_ADDTOOLW, 0, (LPARAM)&ti);
::SendMessageW(toolTipWnd, TTM_SETMAXTIPWIDTH,0, (LPARAM)350);
这将创建一个不绑定到任何其他窗口的工具提示窗口。
所以当你想显示工具提示（例如，响应WM_MOUSEHOVER消息），调用这个：
This will create a tooltip window which is not bound to any other window. So when you want to show the tooltip (e.g. in responds to WM_MOUSEHOVER message), call this:
TOOLINFOW ti = {};
ti.cbSize = sizeof(TOOLINFOW);
ti.hwnd = toolTipWnd;
ti.uId = (UINT)toolTipWnd;
ti.lpszText = L"Sample Tip Text";
::SendMessageW(toolTipWnd,TTM_UPDATETIPTEXTW,0,(LPARAM)&ti); // This will update the tooltip content.
::SendMessageW(toolTipWnd,TTM_TRACKACTIVATE,(WPARAM)TRUE,(LPARAM)&ti);
::SendMessageW(toolTipWnd, TTM_TRACKPOSITION,0,(LPARAM)MAKELONG(x,y)); // Update the position of your tooltip. Screen coordinate.
//::SendMessageW(toolTipWnd,TTM_POPUP,0,0); // TTM_POPUP not working.. Don't know why.
推荐答案
您需要至少调用TTM_ADDTOOL一次， 't调用TTM_SETTOOLINFO或获取TTN_GETDISPINFO没有它AFAIK。
You need to call TTM_ADDTOOL at least once, you can't call TTM_SETTOOLINFO or get TTN_GETDISPINFO without it AFAIK.
如果你的目标它XP +你可以使用TTM_POPUP显示提示在任何位置和任何时间但是你需要自己处理初始延迟，除非你想要一个跟踪工具提示）
If your target it XP+ you can get away with using TTM_POPUP to display the tip at any position and at any time (But you need to handle the initial delay yourself unless you want a tracking tooltip)
通常你调用TTM_ADDTOOL并将它与矩形（TOOLINFO.rect）或子窗口，或者您可以将文本设置为LPSTR_TEXTCALLBACK，并处理TTN_GETDISPINFO，如果一切都有提示。 MSDN有一些示例代码，您应该看看。 ..
Generally you call TTM_ADDTOOL and associate it with a rectangle (TOOLINFO.rect) or a child window, or you can set the text to LPSTR_TEXTCALLBACK and handle TTN_GETDISPINFO if everything has a tip. MSDN has some sample code you should take a look at...
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