Editable Multi-line ListBox

• Download demo project - 87 Kb

Introduction

If you take a look at the snapshot and run the .exe file you`ll realise that there`s nothing I need to say here. I needed this control with item editing, insertion, deletion, and moving capabilities and I asked, "why not share it with people?"

Using the Code

It`s very easy to use just add a variable based on the class and that`s all. You work with it like a normal listbox.

//
// powered by NetControl.ro
//
// .............
void CListBoxXP::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct) 
{
    CString szBuf="";
    COLORREF col;
    if(((int)lpDrawItemStruct->itemID==edited)&&(IsWindow(hHelper)))
        return;
    {
        GetText(lpDrawItemStruct->itemID,szBuf);
         SetTextColor(lpDrawItemStruct->hDC,RGB(0,0,0));
         RECT r;
         memcpy((void*)&r,&lpDrawItemStruct->rcItem,sizeof(RECT));
         if(itm==(int)lpDrawItemStruct->itemID)
         {
            HBRUSH br;
            br=::CreateSolidBrush(LightenColor(<BR>                GetSysColor(COLOR_HIGHLIGHT),0.9));
            ::FillRect(lpDrawItemStruct->hDC,<BR>                &lpDrawItemStruct-&gt;rcItem,br);
            ::DeleteObject(br);
         }
         else
         {
             FillRect(lpDrawItemStruct-&gt;hDC,<BR>                &lpDrawItemStruct->rcItem,<BR>                (HBRUSH)GetStockObject(WHITE_BRUSH));
         }<BR>
         r.left+=5;
         r.top+=2;
         col=RGB(255,255,255);
         if(lpDrawItemStruct->itemState & ODS_SELECTED)
         {
            col=RGB(220,220,220);
            HBRUSH br;
            br=::CreateSolidBrush(LightenColor(<BR>                GetSysColor(COLOR_HIGHLIGHT),0.75));
            ::FillRect(lpDrawItemStruct->hDC,<BR>                &lpDrawItemStruct->rcItem,br);
            ::DeleteObject(br);
         }
         if(lpDrawItemStruct-&gt;itemState & ODS_FOCUS)
         {
            HBRUSH br;
            br = ::CreateSolidBrush(LightenColor(<BR>                GetSysColor(COLOR_HIGHLIGHT),0.5));
            ::FrameRect(lpDrawItemStruct->hDC,<BR>                &lpDrawItemStruct->rcItem,br);
            ::DeleteObject(br);
         }
         SetBkMode(lpDrawItemStruct->hDC,TRANSPARENT);<BR>
         r.left-=3;
         r.top-=2;
         if(CountLines(szBuf) > 1)
             DrawText(lpDrawItemStruct->hDC,szBuf,<BR>                strlen(szBuf),&r,<BR>                DT_LEFT|DT_TOP|DT_WORDBREAK);
         else
             DrawText(lpDrawItemStruct->hDC,szBuf,<BR>                strlen(szBuf),&r,<BR>                DT_LEFT|DT_VCENTER|DT_SINGLELINE);
    }
}

void CListBoxXP::MeasureItem(LPMEASUREITEMSTRUCT lpMeasureItemStruct) 
{
    HDC hDC;
    TEXTMETRIC tm;
    char szBuf[512]="";
    ::SendMessage(this->m_hWnd, LB_GETTEXT,<BR>        (WPARAM)lpMeasureItemStruct->itemID,(LPARAM)szBuf);<BR>
    hDC = ::GetDC(this->m_hWnd);
    CRect r;
    GetClientRect(r);
    ::GetTextMetrics(hDC, &tm);
    lpMeasureItemStruct->itemHeight=(tm.tmHeight)*CountLines(szBuf);
    ::ReleaseDC(this->m_hWnd, hDC);
}
// ...<BR>

This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

A list of licenses authors might use can be found here