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(
                GetSysColor(COLOR_HIGHLIGHT),0.9));
            ::FillRect(lpDrawItemStruct->hDC,
                &lpDrawItemStruct->rcItem,br);
            ::DeleteObject(br);
         }
         else
         {
             FillRect(lpDrawItemStruct->hDC,
                &lpDrawItemStruct->rcItem,
                (HBRUSH)GetStockObject(WHITE_BRUSH));
         }

         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(
                GetSysColor(COLOR_HIGHLIGHT),0.75));
            ::FillRect(lpDrawItemStruct->hDC,
                &lpDrawItemStruct->rcItem,br);
            ::DeleteObject(br);
         }
         if(lpDrawItemStruct->itemState & ODS_FOCUS)
         {
            HBRUSH br;
            br = ::CreateSolidBrush(LightenColor(
                GetSysColor(COLOR_HIGHLIGHT),0.5));
            ::FrameRect(lpDrawItemStruct->hDC,
                &lpDrawItemStruct->rcItem,br);
            ::DeleteObject(br);
         }
         SetBkMode(lpDrawItemStruct->hDC,TRANSPARENT);

         r.left-=3;
         r.top-=2;
         if(CountLines(szBuf) > 1)
             DrawText(lpDrawItemStruct->hDC,szBuf,
                strlen(szBuf),&r,
                DT_LEFT|DT_TOP|DT_WORDBREAK);
         else
             DrawText(lpDrawItemStruct->hDC,szBuf,
                strlen(szBuf),&r,
                DT_LEFT|DT_VCENTER|DT_SINGLELINE);
    }
}

void CListBoxXP::MeasureItem(LPMEASUREITEMSTRUCT lpMeasureItemStruct) 
{
    HDC hDC;
    TEXTMETRIC tm;
    char szBuf[512]="";
    ::SendMessage(this->m_hWnd, LB_GETTEXT,
        (WPARAM)lpMeasureItemStruct->itemID,(LPARAM)szBuf);

    hDC = ::GetDC(this->m_hWnd);
    CRect r;
    GetClientRect(r);
    ::GetTextMetrics(hDC, &tm);
    lpMeasureItemStruct->itemHeight=(tm.tmHeight)*CountLines(szBuf);
    ::ReleaseDC(this->m_hWnd, hDC);
}
// ...