odcombo.cpp

这是一个GPS相关的程序

    int index = m_strings.Index(value);

    m_stringValue = value;

    if ( index >= 0 && index < (int)wxVListBox::GetItemCount() )
    {
        wxVListBox::SetSelection(index);
        m_value = index;
    }
}

wxSize wxPGVListBoxComboPopup::GetAdjustedSize( int minWidth, int prefHeight, int maxHeight )
{
    int height = 250;

    if ( m_strings.GetCount() )
    {
        if ( prefHeight > 0 )
            height = prefHeight;

        if ( height > maxHeight )
            height = maxHeight;

        int totalHeight = GetTotalHeight(); // + 3;
        if ( height >= totalHeight )
        {
            height = totalHeight;
        }
        else
        {
            // Adjust height to a multiple of the height of the first item
            // NB: Calculations that take variable height into account
            //     are unnecessary.
            int fih = GetLineHeight(0);
            int shown = height/fih;
            height = shown * fih;
        }
    }
    else
        height = 50;

    // Take scrollbar into account in width calculations
    int widestWidth = m_widestWidth + wxSystemSettings::GetMetric(wxSYS_VSCROLL_X);
    return wxSize(minWidth > widestWidth ? minWidth : widestWidth,
                  height+2);
}

void wxPGVListBoxComboPopup::Populate( int n, const wxString choices[] )
{
    int i;

    for ( i=0; i<n; i++ )
    {
        const wxString& item = choices[i];
        m_strings.Add(item);
        CheckWidth(i);
    }

    if ( IsCreated() )
        wxVListBox::SetItemCount(n);

    // Sort the initial choices
    if ( m_combo->GetWindowStyle() & wxCB_SORT )
        m_strings.Sort();

    // Find initial selection
    wxString strValue = m_combo->GetValue();
    if ( strValue.Length() )
        m_value = m_strings.Index(strValue);
}

// ----------------------------------------------------------------------------
// input handling
// ----------------------------------------------------------------------------

//
// This is pushed to the event handler queue of either combo box
// or its textctrl (latter if not readonly combo).
//
class wxPGComboBoxTextCtrlHandler : public wxEvtHandler
{
public:

    wxPGComboBoxTextCtrlHandler( wxPGComboControlBase* combo )
        : wxEvtHandler()
    {
        m_combo = combo;
    }
    ~wxPGComboBoxTextCtrlHandler() { }
    void OnKey(wxKeyEvent& event);
    void OnFocus(wxFocusEvent& event);

protected:
    wxPGComboControlBase*   m_combo;

private:
    DECLARE_EVENT_TABLE()
};


BEGIN_EVENT_TABLE(wxPGComboBoxTextCtrlHandler, wxEvtHandler)
    EVT_KEY_DOWN(wxPGComboBoxTextCtrlHandler::OnKey)
    EVT_SET_FOCUS(wxPGComboBoxTextCtrlHandler::OnFocus)
END_EVENT_TABLE()


void wxPGComboBoxTextCtrlHandler::OnKey(wxKeyEvent& event)
{
    // Let the wxComboCtrl event handler have a go first.
    wxPGComboControlBase* combo = m_combo;
    wxObject* prevObj = event.GetEventObject();

    event.SetId(combo->GetId());
    event.SetEventObject(combo);
    combo->GetEventHandler()->ProcessEvent(event);

    event.SetId(((wxWindow*)prevObj)->GetId());
    event.SetEventObject(prevObj);
}

void wxPGComboBoxTextCtrlHandler::OnFocus(wxFocusEvent& event)
{
    // FIXME: This code does run when control is clicked,
    //        yet on Windows it doesn't select all the text.
    if ( !(m_combo->GetInternalFlags() & wxPGCC_NO_TEXT_AUTO_SELECT) )
    {
        if ( m_combo->GetTextCtrl() )
            m_combo->GetTextCtrl()->SelectAll();
        else
            m_combo->SetSelection(-1,-1);
    }

    // Send focus indication to parent.
    // NB: This is needed for cases where the textctrl gets focus
    //     instead of its parent. We'll check if the focus came from
    //     in order to prevent a possible infinite recursion.
    if ( m_combo->ConsumingTextCtrlFocusEvent() )
    {
        wxFocusEvent evt2(wxEVT_SET_FOCUS,m_combo->GetId());
        evt2.SetEventObject(m_combo);
        m_combo->GetEventHandler()->ProcessEvent(evt2);
    }

    event.Skip();
}


//
// This is pushed to the event handler queue of the control in popup.
//

class wxPGComboPopupExtraEventHandler : public wxEvtHandler
{
public:

    wxPGComboPopupExtraEventHandler( wxPGComboControlBase* combo )
        : wxEvtHandler()
    {
        m_combo = combo;
        m_beenInside = false;
    }
    ~wxPGComboPopupExtraEventHandler() { }

    void OnMouseEvent( wxMouseEvent& event );

    // Called from wxPGComboControlBase::OnPopupDismiss
    void OnPopupDismiss()
    {
        m_beenInside = false;
    }

protected:
    wxPGComboControlBase*     m_combo;

    bool                      m_beenInside;

private:
    DECLARE_EVENT_TABLE()
};


BEGIN_EVENT_TABLE(wxPGComboPopupExtraEventHandler, wxEvtHandler)
    EVT_MOUSE_EVENTS(wxPGComboPopupExtraEventHandler::OnMouseEvent)
END_EVENT_TABLE()


void wxPGComboPopupExtraEventHandler::OnMouseEvent( wxMouseEvent& event )
{
    wxPoint pt = event.GetPosition();
    wxSize sz = m_combo->GetPopupControl()->GetClientSize();
    int evtType = event.GetEventType();
    bool isInside = pt.x >= 0 && pt.y >= 0 && pt.x < sz.x && pt.y < sz.y;

    if ( evtType == wxEVT_MOTION ||
         evtType == wxEVT_LEFT_DOWN ||
         evtType == wxEVT_RIGHT_DOWN )
    {
        // Block motion and click events outside the popup
        if ( !isInside )
        {
            event.Skip(false);
            return;
        }
    }
    else if ( evtType == wxEVT_LEFT_UP )
    {
        // Don't let left-down events in if outside
        if ( evtType == wxEVT_LEFT_DOWN )
        {
            if ( !isInside )
                return;
        }

        if ( !m_beenInside )
        {
            if ( isInside )
            {
                m_beenInside = true;
            }
            else
            {
                //
                // Some mouse events to popup that happen outside it, before cursor
                // has been inside the popu, need to be ignored by it but relayed to
                // the dropbutton.
                //
                wxWindow* btn = m_combo->GetButton();
                if ( btn )
                    btn->GetEventHandler()->AddPendingEvent(event);
                else
                    m_combo->GetEventHandler()->AddPendingEvent(event);

                return;
            }

            event.Skip();
        }
    }

    event.Skip();
}

// ----------------------------------------------------------------------------
// wxPGComboControlBase
// ----------------------------------------------------------------------------


BEGIN_EVENT_TABLE(wxPGComboControlBase, wxControl)
    EVT_TEXT(wxID_ANY,wxPGComboControlBase::OnTextCtrlEvent)
    EVT_SIZE(wxPGComboControlBase::OnSizeEvent)
    EVT_KEY_DOWN(wxPGComboControlBase::OnKeyEvent)
    EVT_SET_FOCUS(wxPGComboControlBase::OnFocusEvent)
    EVT_KILL_FOCUS(wxPGComboControlBase::OnFocusEvent)
    //EVT_BUTTON(wxID_ANY,wxPGComboControlBase::OnButtonClickEvent)
    EVT_TEXT_ENTER(wxID_ANY,wxPGComboControlBase::OnTextCtrlEvent)
    EVT_SYS_COLOUR_CHANGED(wxPGComboControlBase::OnSysColourChanged)
END_EVENT_TABLE()


IMPLEMENT_ABSTRACT_CLASS(wxPGComboControlBase, wxControl)

// Have global double buffer - should be enough for multiple combos
static wxBitmap* gs_doubleBuffer = (wxBitmap*) NULL;

void wxPGComboControlBase::Init()
{
    m_winPopup = (wxWindow *)NULL;
    m_popup = (wxWindow *)NULL;
    m_isPopupShown = false;
    m_btn = (wxWindow*) NULL;
    m_text = (wxTextCtrl*) NULL;
    m_popupInterface = (wxPGComboPopup*) NULL;

    m_popupExtraHandler = (wxEvtHandler*) NULL;
    m_textEvtHandler = (wxEvtHandler*) NULL;

#if INSTALL_TOPLEV_HANDLER
    m_toplevEvtHandler = (wxEvtHandler*) NULL;
#endif

    m_heightPopup = -1;

    m_widthMinPopup = -1;

    m_widthCustomPaint = 0;

    m_widthCustomBorder = 0;

    m_btnState = 0;

    m_btnWidDefault = 0;

    m_blankButtonBg = false;

    m_btnWid = m_btnHei = 0;
    m_btnSide = wxRIGHT;
    m_btnSpacingX = 0;

    m_extLeft = 0;
    m_extRight = 0;

    m_absIndent = -1;

    m_iFlags = 0;

    m_fakePopupUsage = 0;
    m_skipTextCtrlFocusEvents = 0;

    m_timeCanAcceptClick = 0;
}

bool wxPGComboControlBase::Create(wxWindow *parent,
                                    wxWindowID id,
                                    const wxString& value,
                                    const wxPoint& pos,
                                    const wxSize& size,
                                    long style,
                                    const wxValidator& validator,
                                    const wxString& name)
{
    if ( !wxControl::Create(parent,
                            id,
                            pos,
                            size,
                            style | wxWANTS_CHARS,
                            validator,
                            name) )
        return false;

    m_valueString = value;

    // Get colours
    OnThemeChange();
    m_absIndent = GetNativeTextIndent();

    return true;
}

void wxPGComboControlBase::InstallInputHandlers()
{
    if ( m_text )
    {
        m_textEvtHandler = new wxPGComboBoxTextCtrlHandler(this);
        m_text->PushEventHandler(m_textEvtHandler);
    }
}

void wxPGComboControlBase::CreateTextCtrl( int extraStyle, const wxValidator& validator )
{
    if ( !(m_windowStyle & wxCB_READONLY) )
    {
        m_text = new wxTextCtrl(this,
                                12345,
                                m_valueString,
                                wxDefaultPosition,
                                wxDefaultSize,
                                // wxTE_PROCESS_TAB is needed because on Windows, wxTAB_TRAVERSAL is
                                // not used by the wxPropertyGrid and therefore the tab is
                                // processed by looking at ancestors to see if they have
                                // wxTAB_TRAVERSAL. The navigation event is then sent to
                                // the wrong window.
                                wxTE_PROCESS_TAB |
                                wxTE_PROCESS_ENTER |
                                //wxWANTS_CHARS |
                                extraStyle,
                                validator);

    #if defined(__WXMSW__) && !defined(__WXWINCE__)
        ::SendMessage(GetHwndOf(m_text), EM_SETMARGINS, EC_LEFTMARGIN | EC_RIGHTMARGIN, MAKELONG(3, 3));
    #endif

        // This is required for some platforms (GTK+ atleast)
        m_text->SetSizeHints(2,4);
    }
}

void wxPGComboControlBase::OnThemeChange()
{
    SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
}

bool wxPGComboControlBase::Destroy()
{
    return wxControl::Destroy();
}

wxPGComboControlBase::~wxPGComboControlBase()
{
    if ( HasCapture() )
        ReleaseMouse();

    HidePopup();

    delete gs_doubleBuffer;
    gs_doubleBuffer = (wxBitmap*) NULL;

#if INSTALL_TOPLEV_HANDLER
    delete ((wxPGComboFrameEventHandler*)m_toplevEvtHandler);
    m_toplevEvtHandler = (wxEvtHandler*) NULL;
#endif

    if ( m_popup )
        m_popup->RemoveEventHandler(m_popupExtraHandler);

    delete m_popupExtraHandler;

    delete m_popupInterface;
    delete m_winPopup;

    if ( m_text )
        m_text->RemoveEventHandler(m_textEvtHandler);

    delete m_textEvtHandler;
}


// ----------------------------------------------------------------------------
// geometry stuff
// ----------------------------------------------------------------------------

// Recalculates button and textctrl areas
void wxPGComboControlBase::CalculateAreas( int btnWidth )
{
    wxSize sz = GetClientSize();
    int customBorder = m_widthCustomBorder;
    bool buttonOutside;
    int btnBorder; // border for button only

    if ( ( (m_iFlags & wxPGCC_BUTTON_OUTSIDE_BORDER) || m_blankButtonBg ) &&
         m_btnSpacingX == 0 && m_btnWid == 0 && m_btnHei == 0 &&
         (!m_bmpNormal.Ok() || m_blankButtonBg) )
    {
        buttonOutside = true;
        m_iFlags |= wxPGCC_IFLAG_BUTTON_OUTSIDE;
        btnBorder = 0;
    }
    else
    {
        buttonOutside = false;
        m_iFlags &= ~(wxPGCC_IFLAG_BUTTON_OUTSIDE);
        btnBorder = customBorder;
    }

    // Defaul indentation
    if ( m_absIndent < 0 )
        m_absIndent = GetNativeTextIndent();

    int butWidth = btnWidth;

    if ( butWidth <= 0 )
        butWidth = m_btnWidDefault;
    else
        m_btnWidDefault = butWidth;

    if ( butWidth <= 0 )
        return;

    // Adjust button width
    if ( m_btnWid < 0 )
        butWidth += m_btnWid;
    else if ( m_btnWid > 0 )
        butWidth = m_btnWid;

    int butHeight = sz.y;