odcombo.cpp

这是一个GPS相关的程序

}

void wxPGComboPopup::OnComboDoubleClick()
{
}

void wxPGComboPopup::SetStringValue( const wxString& WXUNUSED(value) )
{
}

bool wxPGComboPopup::LazyCreate()
{
    return false;
}

void wxPGComboPopup::Dismiss()
{
    m_combo->HidePopup();
}

// ----------------------------------------------------------------------------
// wxPGVListBoxComboPopup is a wxVListBox customized to act as a popup control
//
// ----------------------------------------------------------------------------


BEGIN_EVENT_TABLE(wxPGVListBoxComboPopup, wxVListBox)
    EVT_MOTION(wxPGVListBoxComboPopup::OnMouseMove)
    EVT_KEY_DOWN(wxPGVListBoxComboPopup::OnKey)
    EVT_LEFT_UP(wxPGVListBoxComboPopup::OnLeftClick)
END_EVENT_TABLE()


wxPGVListBoxComboPopup::wxPGVListBoxComboPopup(wxPGComboControl* combo)
                                           : wxVListBox(), wxPGComboPopup(combo)
{
    //m_callback = callback;
    m_widestWidth = 0;
    m_avgCharWidth = 0;
    m_baseImageWidth = 0;
    m_itemHeight = 0;
    m_value = -1;
    m_itemHover = -1;
    m_clientDataItemsType = wxClientData_None;
}

bool wxPGVListBoxComboPopup::Create(wxWindow* parent)
{
    if ( !wxVListBox::Create(parent,
                             wxID_ANY,
                             wxDefaultPosition,
                             wxDefaultSize,
                             wxBORDER_SIMPLE | wxLB_INT_HEIGHT | wxWANTS_CHARS) )
        return false;

    m_font = m_combo->GetFont();

    wxVListBox::SetItemCount(m_strings.GetCount());

    // TODO: Move this to SetFont
    m_itemHeight = GetCharHeight() + 0;

    return true;
}

wxPGVListBoxComboPopup::~wxPGVListBoxComboPopup()
{
    Clear();
}

bool wxPGVListBoxComboPopup::LazyCreate()
{
    // NB: There is a bug with wxVListBox that can be avoided by creating
    //     it later (bug causes empty space to be shown if initial selection
    //     is at the end of a list longer than the control can show at once).
    return true;
}

// paint the control itself
void wxPGVListBoxComboPopup::PaintComboControl( wxDC& dc, const wxRect& rect )
{
    if ( !(m_combo->GetWindowStyle() & wxODCB_STD_CONTROL_PAINT) )
    {
        m_combo->DrawFocusBackground(dc,rect,0);
        if ( m_combo->OnDrawListItem(dc,rect,m_value,wxPGCC_PAINTING_CONTROL) )
            return;
    }

    wxPGComboPopup::PaintComboControl(dc,rect);
}

void wxPGVListBoxComboPopup::OnDrawItem( wxDC& dc, const wxRect& rect, size_t n) const
{
    dc.SetFont(m_font);

    bool isHilited = wxVListBox::GetSelection() == (int) n;

    // Set correct text colour for selected items
    // (must always set the correct colour - atleast GTK may have lost it
    // in between calls).
    if ( isHilited )
        dc.SetTextForeground( wxSystemSettings::GetColour(wxSYS_COLOUR_HIGHLIGHTTEXT) );
    else
        dc.SetTextForeground( wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT) );

    if ( !m_combo->OnDrawListItem(dc,rect,(int)n,0) )
        dc.DrawText( GetString(n), rect.x + 2, rect.y );
}

wxCoord wxPGVListBoxComboPopup::OnMeasureItem(size_t n) const
{
    int itemHeight = m_combo->OnMeasureListItem(n);
    if ( itemHeight < 0 )
        itemHeight = m_itemHeight;

    return itemHeight;
}

void wxPGVListBoxComboPopup::OnDrawBackground(wxDC& dc, const wxRect& rect, size_t n) const
{
    // we need to render selected and current items differently
    if ( IsCurrent(n) )
    {
        m_combo->DrawFocusBackground( dc, rect, wxCONTROL_ISSUBMENU|wxCONTROL_SELECTED );
    }
    //else: do nothing for the normal items
}

void wxPGVListBoxComboPopup::DismissWithEvent()
{
    int selection = wxVListBox::GetSelection();

    Dismiss();

    if ( selection != wxNOT_FOUND )
        m_stringValue = m_strings[selection];
    else
        m_stringValue = wxEmptyString;

    if ( m_stringValue != m_combo->GetValue() )
        m_combo->SetValue(m_stringValue);

    m_value = selection;

    SendComboBoxEvent(selection);
}

void wxPGVListBoxComboPopup::SendComboBoxEvent( int selection )
{
    wxCommandEvent evt(wxEVT_COMMAND_COMBOBOX_SELECTED,m_combo->GetId());

    evt.SetEventObject(m_combo);

    evt.SetInt(selection);

    // Set client data, if any
    if ( selection >= 0 && (int)m_clientDatas.GetCount() > selection )
    {
        void* clientData = m_clientDatas[selection];
        if ( m_clientDataItemsType == wxClientData_Object )
            evt.SetClientObject((wxClientData*)clientData);
        else
            evt.SetClientData(clientData);
    }

    m_combo->GetEventHandler()->AddPendingEvent(evt);
}

// returns true if key was consumed
bool wxPGVListBoxComboPopup::HandleKey( int keycode, bool saturate )
{
    int value = m_value;
    int itemCount = GetCount();

    if ( keycode == WXK_DOWN || keycode == WXK_RIGHT )
    {
        value++;
    }
    else if ( keycode == WXK_UP || keycode == WXK_LEFT )
    {
        value--;
    }
    else if ( keycode == WXK_PAGEDOWN )
    {
        value+=10;
    }
    else if ( keycode == WXK_PAGEUP )
    {
        value-=10;
    }
    /*
    else if ( keycode == WXK_END )
    {
        value = itemCount-1;
    }
    else if ( keycode == WXK_HOME )
    {
        value = 0;
    }
    */
    else
        return false;

    if ( saturate )
    {
        if ( value >= itemCount )
            value = itemCount - 1;
        else if ( value < 0 )
            value = 0;
    }
    else
    {
        if ( value >= itemCount )
            value -= itemCount;
        else if ( value < 0 )
            value += itemCount;
    }

    if ( value == m_value )
        // Even if value was same, don't skip the event
        // (good for consistency)
        return true;

    m_value = value;

    wxString valStr;
    if ( value >= 0 )
        m_combo->SetValue(m_strings[value]);

    SendComboBoxEvent(m_value);

    return true;
}

void wxPGVListBoxComboPopup::OnComboDoubleClick()
{
    // Cycle on dclick (disable saturation to allow true cycling).
    if ( !::wxGetKeyState(WXK_SHIFT) )
        HandleKey(WXK_DOWN,false);
    else
        HandleKey(WXK_UP,false);
}

void wxPGVListBoxComboPopup::OnComboKeyEvent( wxKeyEvent& event )
{
    // Saturated key movement on
    if ( !HandleKey(event.GetKeyCode(),true) )
        event.Skip();
}

void wxPGVListBoxComboPopup::OnPopup()
{
    // *must* set value after size is set (this is because of a vlbox bug)
    wxVListBox::SetSelection(m_value);
}

void wxPGVListBoxComboPopup::OnMouseMove(wxMouseEvent& event)
{
    // Move selection to cursor if it is inside the popup
    int itemHere = GetItemAtPosition(event.GetPosition());
    if ( itemHere >= 0 )
        wxVListBox::SetSelection(itemHere);

    event.Skip();
}

void wxPGVListBoxComboPopup::OnLeftClick(wxMouseEvent& WXUNUSED(event))
{
    DismissWithEvent();
}

void wxPGVListBoxComboPopup::OnKey(wxKeyEvent& event)
{
    // Select item if ENTER is pressed
    if ( event.GetKeyCode() == WXK_RETURN || event.GetKeyCode() == WXK_NUMPAD_ENTER )
    {
        DismissWithEvent();
    }
    // Hide popup if ESC is pressed
    else if ( event.GetKeyCode() == WXK_ESCAPE )
        Dismiss();
    else
        event.Skip();
}

void wxPGVListBoxComboPopup::CheckWidth( int pos )
{
    wxCoord x = m_combo->OnMeasureListItemWidth(pos);

    if ( x < 0 )
    {
        if ( !m_font.Ok() )
            m_font = m_combo->GetFont();

        wxCoord y;
        m_combo->GetTextExtent(m_strings[pos], &x, &y, 0, 0, &m_font);
        x += 4;
    }

    if ( m_widestWidth < x )
    {
        m_widestWidth = x;
    }
}

void wxPGVListBoxComboPopup::Insert( const wxString& item, int pos )
{
    // Need to change selection?
    wxString strValue;
    if ( !(m_combo->GetWindowStyle() & wxCB_READONLY) &&
         m_combo->GetValue() == item )
        m_value = pos;
    else if ( m_value >= pos )
        m_value++;

    m_strings.Insert(item,pos);

    if ( IsCreated() )
        wxVListBox::SetItemCount( wxVListBox::GetItemCount()+1 );

    // Calculate width
    CheckWidth(pos);
}

int wxPGVListBoxComboPopup::Append(const wxString& item)
{
    int pos = (int)m_strings.GetCount();

    if ( m_combo->GetWindowStyle() & wxCB_SORT )
    {
        // Find position
        // TODO: Could be optimized with binary search
        wxArrayString strings = m_strings;
        unsigned int i;

        for ( i=0; i<strings.GetCount(); i++ )
        {
            if ( item.Cmp(strings.Item(i)) < 0 )
            {
                pos = (int)i;
                break;
            }
        }
    }

    Insert(item,pos);

    return pos;
}

void wxPGVListBoxComboPopup::Clear()
{
    wxASSERT(m_combo);

    m_strings.Empty();

    ClearClientDatas();

    if ( IsCreated() )
        wxVListBox::SetItemCount(0);
}

void wxPGVListBoxComboPopup::ClearClientDatas()
{
    if ( m_clientDataItemsType == wxClientData_Object )
    {
        size_t i;
        for ( i=0; i<m_clientDatas.GetCount(); i++ )
            delete (wxClientData*) m_clientDatas[i];
    }

    m_clientDatas.Empty();
}

void wxPGVListBoxComboPopup::SetItemClientData( wxODCIndex n,
                                              void* clientData,
                                              wxClientDataType clientDataItemsType )
{
    // It should be sufficient to update this variable only here
    m_clientDataItemsType = clientDataItemsType;

    m_clientDatas.SetCount(n+1,NULL);
    m_clientDatas[n] = clientData;
}

void* wxPGVListBoxComboPopup::GetItemClientData(wxODCIndex n) const
{
    if ( ((wxODCIndex)m_clientDatas.GetCount()) > n )
        return m_clientDatas[n];

    return NULL;
}

void wxPGVListBoxComboPopup::Delete( wxODCIndex item )
{
    // Remove client data, if set
    if ( m_clientDatas.GetCount() )
    {
        if ( m_clientDataItemsType == wxClientData_Object )
            delete (wxClientData*) m_clientDatas[item];

        m_clientDatas.RemoveAt(item);
    }

    m_strings.RemoveAt(item);

    int sel = GetSelection();

    if ( IsCreated() )
        wxVListBox::SetItemCount( wxVListBox::GetItemCount()-1 );

    if ( (int)item < sel )
        SetSelection(sel-1);
    else if ( (int)item == sel )
        SetSelection(wxNOT_FOUND);
}

int wxPGVListBoxComboPopup::FindString(const wxString& s) const
{
    return m_strings.Index(s);
}

wxODCCount wxPGVListBoxComboPopup::GetCount() const
{
    return m_strings.GetCount();
}

wxString wxPGVListBoxComboPopup::GetString( int item ) const
{
    return m_strings[item];
}

void wxPGVListBoxComboPopup::SetString( int item, const wxString& str )
{
    m_strings[item] = str;
}

wxString wxPGVListBoxComboPopup::GetStringValue() const
{
    return m_stringValue;
}

void wxPGVListBoxComboPopup::SetSelection( int item )
{
    // This seems to be necessary (2.5.3 w/ MingW atleast)
    if ( item < -1 || item >= (int)m_strings.GetCount() )
        item = -1;

    m_value = item;
    if ( item >= 0 )
        m_stringValue = m_strings[item];
    else
        m_stringValue = wxEmptyString;

    if ( IsCreated() )
        wxVListBox::SetSelection(item);
}

int wxPGVListBoxComboPopup::GetSelection() const
{
    return m_value;
}

void wxPGVListBoxComboPopup::SetStringValue( const wxString& value )
{