在MFC中使用TreeView进行事件管理的问题 [英] Problem with event management with TreeView in MFC

问题描述

我在MFC中有一个TreeView控件.

我所做的是，我以某种方式将某些元素放入该树中，使得depth0元素是字母，而深度一个元素是数字，如下所示:-

|
MyTree
| A
| | --1
| | --2
| | --3
|
| --- B
| | --4
| | --5
| | --6
|
| --- C
| | --7
| | --8
| | --9

现在，我想，当我双击字母时，它会显示消息，选择该字母，如果我双击数字，它会显示消息，则选择该数字.

我什至不知道如何在其项目上实现双击事件.如何在...中实现整个过程.

I have a TreeView Control in MFC.

what i did is, i put some elements in a way into that tree such that, the depth0 elements are alphabets and the depth one elements are numbers as below:-

|
MyTree
| A
| |--1
| |--2
| |--3
|
|---B
| |--4
| |--5
| |--6
|
|---C
| |--7
| |--8
| |--9

Now, i want, when i double click the alphabets, it displays message, that alphabet is chosen, and if i double click numbers, it displays message, that number is chosen.

I even dont know, how to implement the double click event on its items. How to implement this whole thing in..??

推荐答案

您需要处理TVN_SELCHANGING和TVN_SELCHANGED通知消息.项目选择的解释如下:
http://msdn.microsoft.com/en-us/library/a9a9f1t7％28v = vs.100％29.aspx [ ^ ].

此处的示例显示如何获取当前选定的项目:
http://www.codersource.net/MFC/MFCTutorials/MFCTreeusageandexample.aspx [ ^ ].

基本上，这就是您所需要的.现在，当您知道要查找的内容(用于Web搜索的关键字)时，可以尝试查找一些更详细的代码示例.

祝你好运，

—SA

You need to handle TVN_SELCHANGING and TVN_SELCHANGED notification messages. Item selection is explained here:
http://msdn.microsoft.com/en-us/library/a9a9f1t7%28v=vs.100%29.aspx[^].

The example here shows how you get the currently selected item:
http://www.codersource.net/MFC/MFCTutorials/MFCTreeusageandexample.aspx[^].

Basically, that''s all you need. Now when you know what to look for (keywords for Web search), you can try to find some more detailed code samples.

Good luck,

—SA

SAKryukov给了您一些非常重要的信息，我想在此添加一些信息:
您可以处理WM_NOTIFY Windows消息和NM_CLICK操作，可以获得正确的树对象

这是一个简单的示例:

SAKryukov gave you some very important information, I want to add some with this:
You can Process WM_NOTIFY windows message and NM_CLICK action, you can get the proper Tree Object

here is a simple example:

case WM_NOTIFY:
NMHDR *nmhdr;
nmhdr=(NMHDR *)lParam;
switch(nmhdr->code)
{
  case NM_CLICK:
  TVHITTESTINFO tv;
  HTREEITEM htr,htr_tblName;
  RECT rc_tree;
  POINT ms_pt;
  GetCursorPos(&ms_pt);
  GetWindowRect(nmhdr->hwndFrom, &rc_tree);
  tv.pt.x=ms_pt.x-rc_tree.left;
  tv.pt.y=ms_pt.y-rc_tree.top;
  htr=TreeView_HitTest(nmhdr->hwndFrom,&tv); //here is the object of the leaf that got clicked
  
}

祝你好运

good luck

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