check
1.在对话框中添加CTreeCtrl控件并勾选Check Boxes选项,为CTreeCtrl控件添加CTreeCtrl变量m_tree;
2.为CTreeCtrl控件添加NM_CLICK消息响应函数OnClickTree();代码如下:
OnClickTree(NMHDR* pNMHDR, LRESULT* pResult)
{
CPoint point;
UINT uFlag; //接收有关点击测试的信息的整数
HTREEITEM hTree;
BOOL bCheck;
GetCursorPos(&point); //获取屏幕鼠标坐标
m_tree.ScreenToClient(&point); //转化成客户坐标
hTree = m_tree.HitTest(point,&uFlag); //返回与CtreeCtrl关联的光标的当前位置和句柄
if (hTree && (TVHT_ONITEMSTATEICON & uFlag)) //点中复选框
{
bCheck = m_treeSsid.GetCheck(hTree); //获取当前复选状态
SetChildCheck(hTree,!bCheck); //设置子项复选状态
}
*pResult = 0;
}
3.SetChildCheck()函数为自定义的处理函数(响应点击复选框后的具体处理函数):
下面的函数功能为:父项选中或取消选中,子项跟住选中或取消选中;
SetChildCheck(HTREEITEM hTree,BOOL bCheck)
{
hTree = m_tree.GetChildItem(hTree); //获取子项句柄
while (hTree)
{
m_tree.SetCheck(hTree, bCheck);
SetChildCheck(hTree,bCheck); //递归调用
hTree = m_tree.GetNextSiblingItem(hTree); //获取兄弟的句柄
}
}
4.总结:关键是TVHT_ONITEMSTATEICON,它标志鼠标点击的是树形控件的复选框;