checklst.cpp

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// send an "item checked" event
void wxCheckListBoxItem::SendEvent()
{
    wxCommandEvent event(wxEVT_COMMAND_CHECKLISTBOX_TOGGLED, m_pParent->GetId());
    event.SetInt(m_nIndex);
    event.SetEventObject(m_pParent);
    m_pParent->ProcessCommand(event);
}

// ----------------------------------------------------------------------------
// implementation of wxCheckListBox class
// ----------------------------------------------------------------------------

// define event table
// ------------------
BEGIN_EVENT_TABLE(wxCheckListBox, wxListBox)
  EVT_KEY_DOWN(wxCheckListBox::OnKeyDown)
  EVT_LEFT_DOWN(wxCheckListBox::OnLeftClick)
END_EVENT_TABLE()

// control creation
// ----------------

// def ctor: use Create() to really create the control
wxCheckListBox::wxCheckListBox()
{
}

// ctor which creates the associated control
wxCheckListBox::wxCheckListBox(wxWindow *parent, wxWindowID id,
                               const wxPoint& pos, const wxSize& size,
                               int nStrings, const wxString choices[],
                               long style, const wxValidator& val,
                               const wxString& name)
{
    Create(parent, id, pos, size, nStrings, choices, style, val, name);
}

wxCheckListBox::wxCheckListBox(wxWindow *parent, wxWindowID id,
                               const wxPoint& pos, const wxSize& size,
                               const wxArrayString& choices,
                               long style, const wxValidator& val,
                               const wxString& name)
{
    Create(parent, id, pos, size, choices, style, val, name);
}

bool wxCheckListBox::Create(wxWindow *parent, wxWindowID id,
                            const wxPoint& pos, const wxSize& size,
                            int n, const wxString choices[],
                            long style,
                            const wxValidator& validator, const wxString& name)
{
    return wxListBox::Create(parent, id, pos, size, n, choices,
                             style | wxLB_OWNERDRAW, validator, name);
}

bool wxCheckListBox::Create(wxWindow *parent, wxWindowID id,
                            const wxPoint& pos, const wxSize& size,
                            const wxArrayString& choices,
                            long style,
                            const wxValidator& validator, const wxString& name)
{
    return wxListBox::Create(parent, id, pos, size, choices,
                             style | wxLB_OWNERDRAW, validator, name);
}

// misc overloaded methods
// -----------------------

void wxCheckListBox::Delete(int N)
{
    wxCHECK_RET( N >= 0 && N < m_noItems,
                 wxT("invalid index in wxListBox::Delete") );

    wxListBox::Delete(N);

    // free memory
    delete m_aItems[N];

    m_aItems.RemoveAt(N);
}

bool wxCheckListBox::SetFont( const wxFont &font )
{
    size_t i;
    for ( i = 0; i < m_aItems.GetCount(); i++ )
        m_aItems[i]->SetFont(font);

    wxListBox::SetFont(font);

    return true;
}

// create/retrieve item
// --------------------

// create a check list box item
wxOwnerDrawn *wxCheckListBox::CreateLboxItem(size_t nIndex)
{
  wxCheckListBoxItem *pItem = new wxCheckListBoxItem(this, nIndex);
  return pItem;
}

// return item size
// ----------------
bool wxCheckListBox::MSWOnMeasure(WXMEASUREITEMSTRUCT *item)
{
  if ( wxListBox::MSWOnMeasure(item) ) {
    MEASUREITEMSTRUCT *pStruct = (MEASUREITEMSTRUCT *)item;

    // save item height
    m_nItemHeight = pStruct->itemHeight;

    // add place for the check mark
    pStruct->itemWidth += wxOwnerDrawn::GetDefaultMarginWidth();

    return true;
  }

  return false;
}

// check items
// -----------

bool wxCheckListBox::IsChecked(size_t uiIndex) const
{
    wxCHECK_MSG( uiIndex < (size_t)GetCount(), false, _T("bad wxCheckListBox index") );

    return GetItem(uiIndex)->IsChecked();
}

void wxCheckListBox::Check(size_t uiIndex, bool bCheck)
{
    wxCHECK_RET( uiIndex < (size_t)GetCount(), _T("bad wxCheckListBox index") );

    GetItem(uiIndex)->Check(bCheck);
}

// process events
// --------------

void wxCheckListBox::OnKeyDown(wxKeyEvent& event)
{
    // what do we do?
    enum
    {
        None,
        Toggle,
        Set,
        Clear
    } oper;

    switch ( event.GetKeyCode() )
    {
        case WXK_SPACE:
            oper = Toggle;
            break;

        case WXK_NUMPAD_ADD:
        case '+':
            oper = Set;
            break;

        case WXK_NUMPAD_SUBTRACT:
        case '-':
            oper = Clear;
            break;

        default:
            oper = None;
    }

    if ( oper != None )
    {
        wxArrayInt selections;
        int count = 0;
        if ( HasMultipleSelection() )
        {
            count = GetSelections(selections);
        }
        else
        {
            int sel = GetSelection();
            if (sel != -1)
            {
                count = 1;
                selections.Add(sel);
            }
        }

        for ( int i = 0; i < count; i++ )
        {
            wxCheckListBoxItem *item = GetItem(selections[i]);
            if ( !item )
            {
                wxFAIL_MSG( _T("no wxCheckListBoxItem?") );
                continue;
            }

            switch ( oper )
            {
                case Toggle:
                    item->Toggle();
                    break;

                case Set:
                case Clear:
                    item->Check( oper == Set );
                    break;

                default:
                    wxFAIL_MSG( _T("what should this key do?") );
            }

            // we should send an event as this has been done by the user and
            // not by the program
            item->SendEvent();
        }
    }
    else // nothing to do
    {
        event.Skip();
    }
}

void wxCheckListBox::OnLeftClick(wxMouseEvent& event)
{
  // clicking on the item selects it, clicking on the checkmark toggles
  if ( event.GetX() <= wxOwnerDrawn::GetDefaultMarginWidth() ) {
    int nItem = HitTest(event.GetX(), event.GetY());

    if ( nItem != wxNOT_FOUND ) {
      wxCheckListBoxItem *item = GetItem(nItem);
      item->Toggle();
      item->SendEvent();
    }
    //else: it's not an error, just click outside of client zone
  }
  else {
    // implement default behaviour: clicking on the item selects it
    event.Skip();
  }
}

int wxCheckListBox::DoHitTestItem(wxCoord x, wxCoord y) const
{
    int nItem = (int)::SendMessage
                             (
                              (HWND)GetHWND(),
                              LB_ITEMFROMPOINT,
                              0,
                              MAKELPARAM(x, y)
                             );

  return nItem >= m_noItems ? wxNOT_FOUND : nItem;
}


wxSize wxCheckListBox::DoGetBestSize() const
{
    wxSize best = wxListBox::DoGetBestSize();
    best.x += wxOwnerDrawn::GetDefaultMarginWidth();  // add room for the checkbox
    CacheBestSize(best);
    return best;
}

#endif