关于CTreeCtrl问题~~~

[snowbirdfly]

我的问题是:
-----当前在线学生
+++用户一
+++用户二
...
其中当前在线学生这个我用的成员函数为~
void CUserView::OnInitialUpdate()
{
CTreeView::OnInitialUpdate();

// TODO: Add your specialized code here and/or call the base class
HICON hIcon[3];
m_imageList.Create(16,16,0,3,3);
//添加小图标到m_imageList中
hIcon[0] = AfxGetApp()->LoadIcon(IDI_TEACHER);
hIcon[1] = AfxGetApp()->LoadIcon(IDI_MALE);
hIcon[2] = AfxGetApp()->LoadIcon(IDI_FEMALE);
for(int n = 0; n < 3;n++)
{
m_imageList.Add(hIcon[n]);
}
CTreeCtrl& tc = GetTreeCtrl();
tc.ModifyStyle(0,TVS_HASBUTTONS | TVS_LINESATROOT | TVS_HASLINES);
//设置背景颜色为绿色和字体颜色为蓝色
tc.SetBkColor(RGB(0,255,255));
tc.SetTextColor(RGB(0,0,255));
tc.SetImageList(&m_imageList,TVSIL_NORMAL);
tvinsert.hParent = NULL;
tvinsert.hInsertAfter = NULL;
tvinsert.item.mask = TVIF_TEXT|TVIF_IMAGE|TVIF_SELECTEDIMAGE;
tvinsert.item.hItem = NULL;
tvinsert.item.state = 0;
tvinsert.item.stateMask = 0;
tvinsert.item.cchTextMax = 6;
tvinsert.item.iSelectedImage = 0;
tvinsert.item.cChildren = 0;
tvinsert.item.lParam = 0;
//top level，最顶层
tvinsert.item.pszText = "当前在线学生";
tvinsert.item.iImage = 0;
hDad = tc.InsertItem(&tvinsert);
}
然后想通过另外一个成员函数来添加学生的姓名~~~
void CUserView::AddItem(short i, char *name, char *text)
{
tvinsert.hParent = hDad;
tvinsert.item.pszText = name;
tvinsert.item.iImage = i;
XXX.InsertItem(&tvinsert);//XXX就是不知道如何获取上面的OnInitialUpdate()里面的tc~
}
因为我使用的是GetTreeCtrl()而不是通过Create()成员函数来创建~~~
那我如何在类中定义CTreeCtrl变量来保存OnInitialUpdate()的tc,然后将该参数传递到AddItem中~~~

[snowbirdfly]

已经解决了~~
感谢楼上~~~

[snowbirdfly]

问题就是如何动态添加用户,使用的是树状控件~~~
就像QQ一样~~
但有用户上线时,就会自动的添加一个列表示该用户上线了`~~~

[mynamelj]

定义成员:
CTreeCtrl* m_pTreeCtrl;


CXXView::CXXView()
{
m_pTreeCtrl = NULL; // 构造清空
}

BOOL CXXView::OnInitialUpdate()
{
...
m_pTreeCtrl = &GetTreeCtrl();
...
}

这样你就可以随时用m_pTreeCtrl来访问CTreeCtrl控件

[snowbirdfly]

恩~~
感谢回答~~~
对了~~~
我用你的方法(实际上之前我也想过~)
void CUserView::OnInitialUpdate()
{
CTreeView::OnInitialUpdate();

// TODO: Add your specialized code here and/or call the base class
HICON hIcon[3];
m_imageList.Create(16,16,0,3,3);
//添加小图标到m_imageList中
hIcon[0] = AfxGetApp()->LoadIcon(IDI_TEACHER);
hIcon[1] = AfxGetApp()->LoadIcon(IDI_MALE);
hIcon[2] = AfxGetApp()->LoadIcon(IDI_FEMALE);
for(int n = 0; n < 3;n++)
{
m_imageList.Add(hIcon[n]);
}
CTreeCtrl& tc = GetTreeCtrl();
tc.ModifyStyle(0,TVS_HASBUTTONS | TVS_LINESATROOT | TVS_HASLINES);
//设置背景颜色为绿色和字体颜色为蓝色
tc.SetBkColor(RGB(0,255,255));
tc.SetTextColor(RGB(0,0,255));
tc.SetImageList(&m_imageList,TVSIL_NORMAL);
tvinsert.hParent = NULL;
tvinsert.hInsertAfter = NULL;
tvinsert.item.mask = TVIF_TEXT|TVIF_IMAGE|TVIF_SELECTEDIMAGE;
tvinsert.item.hItem = NULL;
tvinsert.item.state = 0;
tvinsert.item.stateMask = 0;
tvinsert.item.cchTextMax = 6;
tvinsert.item.iSelectedImage = 0;
tvinsert.item.cChildren = 0;
tvinsert.item.lParam = 0;
//top level，最顶层
tvinsert.item.pszText = "当前在线学生";
tvinsert.item.iImage = 0;
hDad = tc.InsertItem(&tvinsert);
m_pTreeCtrl = &tc;
}


void CUserView::AddItem(short i, char *name, char *text)
{
tvinsert.hParent = hDad;//出错
tvinsert.item.pszText = name;
tvinsert.item.iImage = i;
m_pTreeCtrl->InsertItem(&tvinsert);
}
问题是 hDad和tvinsert我都定义为类的成员变量~~~
所以运行的时候,运行到tvinsert.hParent = hDad;会出现异常~

[T97102003]

在成员函数里也可以用
CTreeCtrl& tc = GetTreeCtrl();

[snowbirdfly]

楼上是什么意思啊~~
是不是也在AddItem(short i, char *name, char *text)里面使用CTreeCtrl& tc = GetTreeCtrl();
阿???
这样是不行的~~~

[T97102003]

从上面的代码看,函数AddItem是CUserView的成员函数,而CUserView继承自CTreeView,
所以CTreeCtrl& tc = GetTreeCtrl();在 AddItem 里是没问题的。

另外:
void CUserView::AddItem(short i, char *name, char *text)
{
tvinsert.hParent = hDad;//出错
tvinsert.item.pszText = name;
tvinsert.item.iImage = i;
m_pTreeCtrl->InsertItem(&tvinsert);
}
问题是 hDad和tvinsert我都定义为类的成员变量~~~
所以运行的时候,运行到tvinsert.hParent = hDad;会出现异常~
============

把tvinsert定义成AddItem的局部变量

[snowbirdfly]

定义成局部变量也出现问题~~
还是tvinsert.hParent = hDad;//还是出错~~~
void CUserView::AddItem(short i, char *name, char *text)
{
TV_INSERTSTRUCT tvinsert;
tvinsert.hParent = hDad;
tvinsert.item.pszText = name;
tvinsert.item.iImage = i;
m_pTreeCtrl->InsertItem(&tvinsert);
}

[T97102003]

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