List Control changing sub items image.
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  1. #1
    Join Date
    Oct 2005
    Posts
    27

    How to tell what sub item has been clicked on?

    Hi All,

    I've created a List Control that displays in the following attached image. The checkboxes come from an ImageList, also attached and shown below.

    What I'd like to do now is provide the functionality to do something like an OnItemSelected(). Then see what item and subitem is clicked and if it is the second sub item, isn't one of the disabled images, check or uncheck respectively.

    I've provided all the project code zipped up and the main Dialog and List Item Changed code below

    Code:
    **************** Dialog Init Code ***************
    BOOL CCheckLCDemoDlg::OnInitDialog()
    {
    	CDialog::OnInitDialog();
    
    	// Add "About..." menu item to system menu.
    
    	// IDM_ABOUTBOX must be in the system command range.
    	ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
    	ASSERT(IDM_ABOUTBOX < 0xF000);
    
    	CMenu* pSysMenu = GetSystemMenu(FALSE);
    	if (pSysMenu != NULL)
    	{
    		CString strAboutMenu;
    		strAboutMenu.LoadString(IDS_ABOUTBOX);
    		if (!strAboutMenu.IsEmpty())
    		{
    			pSysMenu->AppendMenu(MF_SEPARATOR);
    			pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
    		}
    	}
    
    	// Set the icon for this dialog.  The framework does this automatically
    	//  when the application's main window is not a dialog
    	SetIcon(m_hIcon, TRUE);			// Set big icon
    	SetIcon(m_hIcon, FALSE);		// Set small icon
    	
    	// TODO: Add extra initialization here
    	CRect rect;
    	m_listCtrl.GetClientRect(rect);
    	m_listCtrl.InsertColumn(0, _T(""), LVCFMT_CENTER, 30);
    	m_listCtrl.InsertColumn(1, _T("Layer"), LVCFMT_LEFT, 150);
    	m_listCtrl.InsertColumn(2, _T("Zoom"), LVCFMT_LEFT, 100);
    	m_listCtrl.InsertColumn(3, _T("Labels"), LVCFMT_LEFT, rect.Width() - 280);
    
    
    	VERIFY( m_checkLCImgList.Create(IDB_CHECKBOXES, 16, 4, RGB(255,0,255)) );
    	int j = m_checkLCImgList.GetImageCount();
    	m_listCtrl.SetImageList(&m_checkLCImgList, LVSIL_SMALL);
    	
    	
    	//Add items
    	int nPos = 0;
    	LV_ITEM lvi;
    
    	ZeroMemory(&lvi, sizeof(lvi));
    	lvi.mask = LVIF_TEXT | LVIF_IMAGE;
    	lvi.pszText = "";
    	lvi.cchTextMax = lstrlen(lvi.pszText);
    	lvi.iImage = 4; // First image from image list
    	nPos = m_listCtrl.InsertItem(&lvi);
    
    	ZeroMemory(&lvi, sizeof(lvi));
    	lvi.mask = LVIF_TEXT;
    	lvi.pszText = "Item 1";
    	lvi.cchTextMax = lstrlen(lvi.pszText);
    	lvi.iItem = nPos;
    	lvi.iSubItem = 1;
    	m_listCtrl.SetItem(&lvi);
    	
    	
    	ZeroMemory(&lvi, sizeof(lvi));
    	lvi.mask = LVIF_TEXT | LVIF_IMAGE;
    	lvi.pszText = "";
    	lvi.cchTextMax = lstrlen(lvi.pszText);
    	lvi.iImage = 3; // First image from image list
    	nPos = m_listCtrl.InsertItem(&lvi);
    
    	ZeroMemory(&lvi, sizeof(lvi));
    	lvi.mask = LVIF_TEXT;
    	lvi.pszText = "Item 1";
    	lvi.cchTextMax = lstrlen(lvi.pszText);
    	lvi.iItem = nPos;
    	lvi.iSubItem = 1;
    	m_listCtrl.SetItem(&lvi);
    	
    	
    	ZeroMemory(&lvi, sizeof(lvi));
    	lvi.mask = LVIF_TEXT | LVIF_IMAGE;
    	lvi.pszText = "";
    	lvi.cchTextMax = lstrlen(lvi.pszText);
    	lvi.iImage = 1; // First image from image list
    	nPos = m_listCtrl.InsertItem(&lvi);
    
    	ZeroMemory(&lvi, sizeof(lvi));
    	lvi.mask = LVIF_TEXT;
    	lvi.pszText = "Item 1";
    	lvi.cchTextMax = lstrlen(lvi.pszText);
    	lvi.iItem = nPos;
    	lvi.iSubItem = 1;
    	m_listCtrl.SetItem(&lvi);
    	
    	
    	ZeroMemory(&lvi, sizeof(lvi));
    	lvi.mask = LVIF_TEXT | LVIF_IMAGE;
    	lvi.pszText = "";
    	lvi.cchTextMax = lstrlen(lvi.pszText);
    	lvi.iImage = 1; // First image from image list
    	nPos = m_listCtrl.InsertItem(&lvi);
    
    	ZeroMemory(&lvi, sizeof(lvi));
    	lvi.mask = LVIF_TEXT;
    	lvi.pszText = "Item 1";
    	lvi.cchTextMax = lstrlen(lvi.pszText);
    	lvi.iItem = nPos;
    	lvi.iSubItem = 1;
    	m_listCtrl.SetItem(&lvi);
    	
    	
    	ZeroMemory(&lvi, sizeof(lvi));
    	lvi.mask = LVIF_TEXT | LVIF_IMAGE;
    	lvi.pszText = "";
    	lvi.cchTextMax = lstrlen(lvi.pszText);
    	lvi.iImage = 2; // First image from image list
    	nPos = m_listCtrl.InsertItem(&lvi);
    
    	ZeroMemory(&lvi, sizeof(lvi));
    	lvi.mask = LVIF_TEXT;
    	lvi.pszText = "Item 1";
    	lvi.cchTextMax = lstrlen(lvi.pszText);
    	lvi.iItem = nPos;
    	lvi.iSubItem = 1;
    	m_listCtrl.SetItem(&lvi);
    	
    	
    	int listOrder[4];
    	listOrder[0] = 1;
    	listOrder[1] = 0;
    	listOrder[2] = 2;
    	listOrder[3] = 3;
    	m_listCtrl.SetColumnOrderArray(4, listOrder);
    	
    
    	m_listCtrl.SetExtendedStyle( m_listCtrl.GetExtendedStyle() | LVS_EX_FULLROWSELECT | LVS_EX_SUBITEMIMAGES);
    	m_listCtrl.Init();
    	
    	return TRUE;  // return TRUE  unless you set the focus to a control
    }
    
    
    void CCheckListCtrl::OnItemChanged(NMHDR* pNMHDR, LRESULT* pResult)
    {
    	NMLISTVIEW* pNMLV = (NMLISTVIEW*)pNMHDR;
    	*pResult = 0;
    
    	if ( m_blInited && LVIF_STATE == pNMLV->uChanged)
    	{
    		//Not sure on how to continue from here
    		//See what item and sub item have been selected if the image is not
    		//disabled then the active check or uncheck box images get displayed
    		//respectively.
    	}
    
    }
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    Attached Files Attached Files
    Last edited by ill_comms; March 22nd, 2009 at 09:21 PM. Reason: Added code tags

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