Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

DLL with UI Threads

Posted on 2001-07-16
5
Medium Priority
?
198 Views
Last Modified: 2013-11-20
I have a CTreeCtrl and a List Box in the DLL.  When implementing the threads, the CTreeCtrl and List Box were destroyed when the control moves back to the main program.
How can I hold the CTreeCtrl and List Box (with data in them)?  Can anyone help?  Thanks.

0
Comment
Question by:cindywan
  • 3
  • 2
5 Comments
 
LVL 6

Accepted Solution

by:
MichaelS earned 100 total points
ID: 6288851
You have to define it like global variables for example.
0
 

Author Comment

by:cindywan
ID: 6288866
I did.  I also use TldSetValue() to set (LPVOID) lParam into memory space, but it doesn't seems to work.
0
 
LVL 6

Expert Comment

by:MichaelS
ID: 6288873
Well, why than you accepted my comment as answer? Anyway, can you show your code?
0
 

Author Comment

by:cindywan
ID: 6292697
// TreeDlg.cpp : implementation file
//

#include "stdafx.h"
#include "RouteDLL2.h"
#include "TreeDlg.h"
#include <string.h>

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif


CString *Arrayx, *tmpRoute;
TVINSERTSTRUCT tvInsert;
HTREEITEM hRoot;
HTREEITEM hItem1, hItem2;
HTREEITEM hParent1, hParent2;
long IdxCnt1 = 0, numNode1 = 0, numNode2 = 0;

DWORD      dwTlsIndex1=0;
DWORD      dwTlsIndex2=0;

/////////////////////////////////////////////////////////////////////////////
// CTreeDlg dialog


CTreeDlg::CTreeDlg(CWnd* pParent /*=NULL*/)
      : CDialog(CTreeDlg::IDD, pParent)
{
      //{{AFX_DATA_INIT(CTreeDlg)
            // NOTE: the ClassWizard will add member initialization here
      //}}AFX_DATA_INIT
}


void CTreeDlg::DoDataExchange(CDataExchange* pDX)
{
      CDialog::DoDataExchange(pDX);
      //{{AFX_DATA_MAP(CTreeDlg)
      DDX_Control(pDX, IDC_BUTTON1, m_pButton1);
      DDX_Control(pDX, IDC_LIST3, m_pList3);
      DDX_Control(pDX, IDC_LIST2, m_pList2);
      DDX_Control(pDX, IDC_LIST1, m_pList1);
      DDX_Control(pDX, IDC_TREE2, m_pTree2);
      DDX_Control(pDX, IDC_TREE1, m_pTree1);
      //}}AFX_DATA_MAP
}


BEGIN_MESSAGE_MAP(CTreeDlg, CDialog)
      //{{AFX_MSG_MAP(CTreeDlg)
      //}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CTreeDlg message handlers

BOOL CTreeDlg::OnInitDialog()
{
      CDialog::OnInitDialog();

      return TRUE;  // return TRUE unless you set the focus to a control
                    // EXCEPTION: OCX Property Pages should return FALSE
}

void CTreeDlg::OnOK()
{
      CDialog::OnOK();
}


long CTreeDlg::StartRoute(long start, long end)
{
      long total;

      ThreadParams * th1 = new ThreadParams;
      ThreadParams * th2 = new ThreadParams;

      // Draw nodes on Tree 1
      tvInsert.hParent = NULL;
      tvInsert.hInsertAfter = NULL;
      tvInsert.item.mask = TVIF_TEXT;
      tvInsert.item.pszText = "Parent";
      hRoot = m_pTree1.InsertItem(&tvInsert);
      m_pTree1.EnsureVisible(hRoot);
                  
      for (IdxCnt1 = 0; IdxCnt1 < 5; IdxCnt1++)
      {
            tvInsert.hParent = hRoot;
            tvInsert.hInsertAfter = NULL;
            tvInsert.item.mask = TVIF_TEXT;
            tvInsert.item.pszText = "Child";
            HTREEITEM hFirst = m_pTree1.InsertItem(&tvInsert);
            if (IdxCnt1 == 0)      hParent1 = hFirst;
            m_pTree1.EnsureVisible(hFirst);
            m_pList1.InsertString(-1, "Child");
            m_pList1.SetCurSel(m_pList1.GetCount()-1);
      }

      // Draw nodes on Tree 2
      tvInsert.hParent = NULL;
      tvInsert.hInsertAfter = NULL;
      tvInsert.item.mask = TVIF_PARAM | TVIF_TEXT;
      tvInsert.item.pszText = "Parent";
      hRoot = m_pTree2.InsertItem(&tvInsert);
      m_pTree2.EnsureVisible(hRoot);
                  
      for (IdxCnt1 = 0; IdxCnt1 < 5; IdxCnt1++)
      {
            tvInsert.hParent = hRoot;
            tvInsert.hInsertAfter = NULL;
            tvInsert.item.mask = TVIF_PARAM | TVIF_TEXT;
            tvInsert.item.pszText = "Child";
            HTREEITEM hSecond = m_pTree2.InsertItem(&tvInsert);
            if (IdxCnt1 == 0)      hParent2 = hSecond;
            m_pTree2.EnsureVisible(hSecond);
            m_pList2.InsertString(-1, "Child");
            m_pList2.SetCurSel(m_pList2.GetCount()-1);
      }

      // threads start
      th1->list1 = &m_pList1;
      th1->list2 = &m_pList2;
      th1->list3 = &m_pList3;
      th1->tree1 = &m_pTree1;
      th1->tree2 = &m_pTree2;
      th1->cs = &mc;
      dwTlsIndex1 = TlsAlloc();
      AfxBeginThread(SubStart, (LPVOID) th1);
      Sleep(2000);
      
      th2->list1 = &m_pList1;
      th2->list2 = &m_pList2;
      th2->list3 = &m_pList3;
      th2->tree1 = &m_pTree1;
      th2->tree2 = &m_pTree2;
      th2->cs = &mc;
      dwTlsIndex2 = TlsAlloc();
      AfxBeginThread(SubEnd, (LPVOID) th2);
      Sleep(2000);

      return total = m_pList1.GetCount();
}


UINT SubStart(LPVOID pParam1)
{
      long s1 = 0, s2 = 0;


      ThreadParams *th1 = (ThreadParams *) pParam1;
      TlsSetValue(dwTlsIndex1, &th1);

      numNode1 = th1->tree1->GetCount();

      if (numNode1 == 0)
      {
            TlsFree(dwTlsIndex1);
            AfxEndThread(WM_QUIT, true);
            return true;
      }

      // Go through each child and add in two children each.
      for (s1 = 0; s1 < numNode1; s1++)
      {
            // higlight the next node
            th1->tree1->SelectItem(th1->tree1->GetNextItem(hParent1, TVGN_NEXT));
            hItem1 = th1->tree1->GetSelectedItem();

            // Add Children
            for (s2 = 0; s2 < 2; s2++)
            {
                  tvInsert.hParent = hParent1;
                  tvInsert.hInsertAfter = hParent1;
                  tvInsert.item.mask = TVIF_PARAM | TVIF_TEXT;
                  tvInsert.item.pszText = "GrandChild";
                  HTREEITEM hFirst = th1->tree1->InsertItem(&tvInsert);
                  th1->tree1->EnsureVisible(hFirst);
                  // Insert into a list box
                  th1->list1->InsertString(-1, "GrandChild");
                  th1->list1->SetCurSel(th1->list1->GetCount() - 1);
            }

            // if there is no next node in the tree
            if (hItem1 == NULL)
            {
                  TlsFree(dwTlsIndex1);
                  AfxEndThread(WM_QUIT, true);
                  return true;
            }
            else
            {
                  hParent1 = hItem1;
            }
      }

      TlsFree(dwTlsIndex1);
      AfxEndThread(WM_QUIT, true);
      return true;
}


UINT SubEnd(LPVOID pParam2)
{
      long e1 = 0, e2 = 0;

      ThreadParams *th2 = (ThreadParams *) pParam2;
      TlsSetValue(dwTlsIndex2, &th2);

      numNode2 = th2->tree2->GetCount();

      if (numNode2 == 0)
      {
            TlsFree(dwTlsIndex2);
            AfxEndThread(WM_QUIT, true);
            return true;
      }

      // Go through each child and add in two children each.
      for (e1 = 0; e1 < 5; e1++)
      {
            // higlight the next node
            th2->tree2->SelectItem(th2->tree2->GetNextItem(hParent2, TVGN_NEXT));
            hItem2 = th2->tree2->GetSelectedItem();

            // Add Children
            for (e2 = 0; e2 < 2; e2++)
            {
                  tvInsert.hParent = hParent2;
                  tvInsert.hInsertAfter = hParent2;
                  tvInsert.item.mask = TVIF_PARAM | TVIF_TEXT;
                  tvInsert.item.pszText = "GrandChild";
                  HTREEITEM hSecond = th2->tree2->InsertItem(&tvInsert);
                  th2->tree2->EnsureVisible(hSecond);
                  // Insert into a list box
                  th2->list2->InsertString(-1, "GrandChild");
                  th2->list2->SetCurSel(th2->list2->GetCount() - 1);
            }

            // if there is no next node in the tree
            if (hItem2 == NULL)
            {
                  TlsFree(dwTlsIndex2);
                  AfxEndThread(WM_QUIT, true);
                  return true;
            }
            else
            {
                  hParent2 = hItem2;
            }
      }

      TlsFree(dwTlsIndex2);
      AfxEndThread(WM_QUIT, true);
      return true;
}
0
 

Author Comment

by:cindywan
ID: 6292708

long __stdcall OFFRoute(long start, long end)
{
      AFX_MANAGE_STATE(AfxGetStaticModuleState());

      long i = 0;
      CTreeDlg dlg;

      dlg.Create(IDD_TREEDLG, NULL);
      dlg.ShowWindow(SW_SHOW);

      i = dlg.StartRoute (start, end);
      return i;
}


// TreeDlg.cpp : implementation file
//
#include "stdafx.h"
#include "RouteDLL2.h"
#include "TreeDlg.h"
#include <string.h>

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif


CString *Arrayx, *tmpRoute;
TVINSERTSTRUCT tvInsert;
HTREEITEM hRoot;
HTREEITEM hItem1, hItem2;
HTREEITEM hParent1, hParent2;
long IdxCnt1 = 0, numNode1 = 0, numNode2 = 0;

DWORD      dwTlsIndex1=0;
DWORD      dwTlsIndex2=0;

/////////////////////////////////////////////////////////////////////////////
// CTreeDlg dialog


CTreeDlg::CTreeDlg(CWnd* pParent /*=NULL*/)
      : CDialog(CTreeDlg::IDD, pParent)
{
      //{{AFX_DATA_INIT(CTreeDlg)
            // NOTE: the ClassWizard will add member initialization here
      //}}AFX_DATA_INIT
}


void CTreeDlg::DoDataExchange(CDataExchange* pDX)
{
      CDialog::DoDataExchange(pDX);
      //{{AFX_DATA_MAP(CTreeDlg)
      DDX_Control(pDX, IDC_BUTTON1, m_pButton1);
      DDX_Control(pDX, IDC_LIST3, m_pList3);
      DDX_Control(pDX, IDC_LIST2, m_pList2);
      DDX_Control(pDX, IDC_LIST1, m_pList1);
      DDX_Control(pDX, IDC_TREE2, m_pTree2);
      DDX_Control(pDX, IDC_TREE1, m_pTree1);
      //}}AFX_DATA_MAP
}


BEGIN_MESSAGE_MAP(CTreeDlg, CDialog)
      //{{AFX_MSG_MAP(CTreeDlg)
      //}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CTreeDlg message handlers

BOOL CTreeDlg::OnInitDialog()
{
      CDialog::OnInitDialog();

      return TRUE;  // return TRUE unless you set the focus to a control
                    // EXCEPTION: OCX Property Pages should return FALSE
}

void CTreeDlg::OnOK()
{
      CDialog::OnOK();
}


long CTreeDlg::StartRoute(long start, long end)
{
      long total;

      ThreadParams * th1 = new ThreadParams;
      ThreadParams * th2 = new ThreadParams;

      // Draw nodes on Tree 1
      tvInsert.hParent = NULL;
      tvInsert.hInsertAfter = NULL;
      tvInsert.item.mask = TVIF_TEXT;
      tvInsert.item.pszText = "Parent";
      hRoot = m_pTree1.InsertItem(&tvInsert);
      m_pTree1.EnsureVisible(hRoot);
                  
      for (IdxCnt1 = 0; IdxCnt1 < 5; IdxCnt1++)
      {
            tvInsert.hParent = hRoot;
            tvInsert.hInsertAfter = NULL;
            tvInsert.item.mask = TVIF_TEXT;
            tvInsert.item.pszText = "Child";
            HTREEITEM hFirst = m_pTree1.InsertItem(&tvInsert);
            if (IdxCnt1 == 0)      hParent1 = hFirst;
            m_pTree1.EnsureVisible(hFirst);
            m_pList1.InsertString(-1, "Child");
            m_pList1.SetCurSel(m_pList1.GetCount()-1);
      }

      // Draw nodes on Tree 2
      tvInsert.hParent = NULL;
      tvInsert.hInsertAfter = NULL;
      tvInsert.item.mask = TVIF_PARAM | TVIF_TEXT;
      tvInsert.item.pszText = "Parent";
      hRoot = m_pTree2.InsertItem(&tvInsert);
      m_pTree2.EnsureVisible(hRoot);
                  
      for (IdxCnt1 = 0; IdxCnt1 < 5; IdxCnt1++)
      {
            tvInsert.hParent = hRoot;
            tvInsert.hInsertAfter = NULL;
            tvInsert.item.mask = TVIF_PARAM | TVIF_TEXT;
            tvInsert.item.pszText = "Child";
            HTREEITEM hSecond = m_pTree2.InsertItem(&tvInsert);
            if (IdxCnt1 == 0)      hParent2 = hSecond;
            m_pTree2.EnsureVisible(hSecond);
            m_pList2.InsertString(-1, "Child");
            m_pList2.SetCurSel(m_pList2.GetCount()-1);
      }

      // threads start
      th1->list1 = &m_pList1;
      th1->list2 = &m_pList2;
      th1->list3 = &m_pList3;
      th1->tree1 = &m_pTree1;
      th1->tree2 = &m_pTree2;
      th1->cs = &mc;
      dwTlsIndex1 = TlsAlloc();
      AfxBeginThread(SubStart, (LPVOID) th1);
      Sleep(2000);
      
      th2->list1 = &m_pList1;
      th2->list2 = &m_pList2;
      th2->list3 = &m_pList3;
      th2->tree1 = &m_pTree1;
      th2->tree2 = &m_pTree2;
      th2->cs = &mc;
      dwTlsIndex2 = TlsAlloc();
      AfxBeginThread(SubEnd, (LPVOID) th2);
      Sleep(2000);

      return total = m_pList1.GetCount();
}


UINT SubStart(LPVOID pParam1)
{
      long s1 = 0, s2 = 0;


      ThreadParams *th1 = (ThreadParams *) pParam1;
      TlsSetValue(dwTlsIndex1, &th1);

      numNode1 = th1->tree1->GetCount();

      if (numNode1 == 0)
      {
            TlsFree(dwTlsIndex1);
            AfxEndThread(WM_QUIT, true);
            return true;
      }

      // Go through each child and add in two children each.
      for (s1 = 0; s1 < numNode1; s1++)
      {
            // higlight the next node
            th1->tree1->SelectItem(th1->tree1->GetNextItem(hParent1, TVGN_NEXT));
            hItem1 = th1->tree1->GetSelectedItem();

            // Add Children
            for (s2 = 0; s2 < 2; s2++)
            {
                  tvInsert.hParent = hParent1;
                  tvInsert.hInsertAfter = hParent1;
                  tvInsert.item.mask = TVIF_PARAM | TVIF_TEXT;
                  tvInsert.item.pszText = "GrandChild";
                  HTREEITEM hFirst = th1->tree1->InsertItem(&tvInsert);
                  th1->tree1->EnsureVisible(hFirst);
                  // Insert into a list box
                  th1->list1->InsertString(-1, "GrandChild");
                  th1->list1->SetCurSel(th1->list1->GetCount() - 1);
            }

            // if there is no next node in the tree
            if (hItem1 == NULL)
            {
                  TlsFree(dwTlsIndex1);
                  AfxEndThread(WM_QUIT, true);
                  return true;
            }
            else
            {
                  hParent1 = hItem1;
            }
      }

      TlsFree(dwTlsIndex1);
      AfxEndThread(WM_QUIT, true);
      return true;
}


UINT SubEnd(LPVOID pParam2)
{
      long e1 = 0, e2 = 0;

      ThreadParams *th2 = (ThreadParams *) pParam2;
      TlsSetValue(dwTlsIndex2, &th2);

      numNode2 = th2->tree2->GetCount();

      if (numNode2 == 0)
      {
            TlsFree(dwTlsIndex2);
            AfxEndThread(WM_QUIT, true);
            return true;
      }

      // Go through each child and add in two children each.
      for (e1 = 0; e1 < 5; e1++)
      {
            // higlight the next node
            th2->tree2->SelectItem(th2->tree2->GetNextItem(hParent2, TVGN_NEXT));
            hItem2 = th2->tree2->GetSelectedItem();

            // Add Children
            for (e2 = 0; e2 < 2; e2++)
            {
                  tvInsert.hParent = hParent2;
                  tvInsert.hInsertAfter = hParent2;
                  tvInsert.item.mask = TVIF_PARAM | TVIF_TEXT;
                  tvInsert.item.pszText = "GrandChild";
                  HTREEITEM hSecond = th2->tree2->InsertItem(&tvInsert);
                  th2->tree2->EnsureVisible(hSecond);
                  // Insert into a list box
                  th2->list2->InsertString(-1, "GrandChild");
                  th2->list2->SetCurSel(th2->list2->GetCount() - 1);
            }

            // if there is no next node in the tree
            if (hItem2 == NULL)
            {
                  TlsFree(dwTlsIndex2);
                  AfxEndThread(WM_QUIT, true);
                  return true;
            }
            else
            {
                  hParent2 = hItem2;
            }
      }

      TlsFree(dwTlsIndex2);
      AfxEndThread(WM_QUIT, true);
      return true;
}

//////////////////
// Test Program //
//////////////////
case IDC_BUTTON1:
{
      
    total = OFFRoute(1, 10);
    if (total >= 0)
      MessageBox(NULL, "Result found", NULL, MB_OK);
    else
      MessageBox(NULL, "No Result found", NULL, MB_OK);
    break;
}
0

Featured Post

Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Here is how to use MFC's automatic Radio Button handling in your dialog boxes and forms.  Beginner programmers usually start with a OnClick handler for each radio button and that's just not the right way to go.  MFC has a very cool system for handli…
Introduction: Database storage, where is the exe actually on the disc? Playing a game selected randomly (how to generate random numbers).  Error trapping with try..catch to help the code run even if something goes wrong. Continuing from the seve…
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.
Look below the covers at a subform control , and the form that is inside it. Explore properties and see how easy it is to aggregate, get statistics, and synchronize results for your data. A Microsoft Access subform is used to show relevant calcul…
Suggested Courses

916 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question