学习：Tree Control

/*
D:Visual_Studio_reposMFC7
*/

/*插入*/
void CMy7Dlg::OnBnClickedButton1()
{
	/*
		逻辑顺序：
		1、利用GetSelectedItem函数获取被选中的节点
		2、if判断是否有节点选中，如果没有的话创建一个HTREEITEM结构体作为节点进行插入
		3、插入的顺序为 hInsertAfter = TVI_LAST，节点的名称为EDIT控件的名称
		4、进行插入InsertItem 返回一个新节点的句柄
		5、插入成功后，默认选中插入的节点
	*/
	CString mString;
	GetDlgItemText(IDC_EDIT1,mString);
	HTREEITEM hTree = m_tree_1.GetSelectedItem();
	if (hTree == NULL) {
		hTree = TVI_ROOT;
	}

	TVINSERTSTRUCT tv = { 0 };
	tv.hParent = hTree;
	tv.hInsertAfter = TVI_LAST;
	tv.item.pszText = mString.GetBuffer(); //获取Cstring的字符串的指针
	tv.item.mask = TVIF_TEXT;
	HTREEITEM NewTree = m_tree_1.InsertItem(&tv); // 插入节点
	m_tree_1.SelectItem(NewTree); //插入后 再进行默认选中
}


/*修改*/
void CMy7Dlg::OnBnClickedButton2()
{
	CString mString;
	CString TreeName;
	GetDlgItemText(IDC_EDIT1, mString);
	HTREEITEM hTree = m_tree_1.GetSelectedItem();
	m_tree_1.SetItemText(hTree, mString.GetBuffer());

}


void CMy7Dlg::OnBnClickedButton3()
{
	HTREEITEM hTree = m_tree_1.GetSelectedItem();
	m_tree_1.DeleteItem(hTree);
}

/*实时EDIT节点名*/
void CMy7Dlg::OnTvnSelchangedTree1(NMHDR *pNMHDR, LRESULT *pResult)
{
	LPNMTREEVIEW pNMTreeView = reinterpret_cast<LPNMTREEVIEW>(pNMHDR);
	
	CString mString;
	HTREEITEM hTree = m_tree_1.GetSelectedItem();
	mString = m_tree_1.GetItemText(hTree);
	SetDlgItemText(IDC_EDIT1, mString);
	*pResult = 0;
}