Tree Control

Hi
can any one tell how can i do ,when we click the different child node in tree control, i want to display different bitmap image on the dialog box when i click to each child node as my option
regards
vasanth

Hello,

If I understood your problem correctly, you have a tree control and a bitmap is associated with each of its child item. When the user selects a child item, corresponding bitmap should be displayed in the dialog box. Is it not so?

You can use SetItemData and GetItemData member functions of CTreeCtrl or derived objects to store / retrieve the bitmap IDs.

Here is a sample code for storing the bitmaps as data of each item:

[CODE]HTREEITEM hItem;
m_Tree.SetItemData(hItem = m_Tree.InsertItem("1"), IDB_BITMAP1);
m_Tree.SetItemData(m_Tree.InsertItem("11", hItem), IDB_BITMAP2);
m_Tree.SetItemData(m_Tree.InsertItem("12", hItem), IDB_BITMAP3);
m_Tree.SetItemData(m_Tree.InsertItem("13", hItem), IDB_BITMAP4);
m_Tree.SetItemData(hItem = m_Tree.InsertItem("2"), IDB_BITMAP5);
m_Tree.SetItemData(m_Tree.InsertItem("21", hItem), IDB_BITMAP6);
m_Tree.SetItemData(m_Tree.InsertItem("22", hItem), IDB_BITMAP7);/CODE]

In the event of TVN_SELCHANGED for the tree control, you can write the code to display the appropriate bitmap in the panel.

Code:

---

HTREEITEM hItem = m_Tree.GetSelectedItem();
if (hItem)
{
        CStatic* pPanel = (CStatic*) GetDlgItem(IDC_PANEL);
        UINT ID = m_Tree.GetItemData(hItem);
        CClientDC DC(pPanel);
        CDC MemDC;
        if (MemDC.CreateCompatibleDC(&DC))
        {
                CBitmap Bitmap;
                Bitmap.LoadBitmap(ID);
                BITMAP BM;
                Bitmap.GetBitmap(&BM);
                CBitmap* pBitmap = MemDC.SelectObject(&Bitmap);
                DC.BitBlt(0, 0, BM.bmWidth, BM.bmHeight, &MemDC, 0, 0, SRCCOPY);
                MemDC.SelectObject(pBitmap);
                Bitmap.DeleteObject();
                MemDC.DeleteDC();
        }
}

---

You will be able to view the bitmap associated with each item of the selection.

Regards,
Pravin.