odcombo.cpp

这是一个GPS相关的程序

    int type = event.GetEventType();

    if ( type == wxEVT_MOTION )
    {
        if ( flags & wxPGCC_MF_ON_BUTTON )
        {
            if ( !(m_btnState & wxCONTROL_CURRENT) )
            {
                // Mouse hover begins
                m_btnState |= wxCONTROL_CURRENT;
                if ( HasCapture() ) // Retain pressed state.
                    m_btnState |= wxCONTROL_PRESSED;
                Refresh();
            }
        }
        else if ( (m_btnState & wxCONTROL_CURRENT) )
        {
            // Mouse hover ends
            m_btnState &= ~(wxCONTROL_CURRENT|wxCONTROL_PRESSED);
            Refresh();
        }
    }
//  else if ( type == wxEVT_LEFT_DOWN )	// O.C.: first click on combobox drops down the list immediately !!!!
    else if ( type == wxEVT_LEFT_DOWN || (type == wxEVT_ENTER_WINDOW && event.LeftIsDown()) )
    {
        // Only accept event if it wasn't right after popup dismiss
        //if ( ::wxGetLocalTimeMillis() > m_timeCanClick )
        {
			if( type == wxEVT_ENTER_WINDOW && m_popup )	// O.C.: click again hides the list !!!!
			{
				HidePopup();
			}
			else
            // Need to test this, because it might be outside.
            if ( flags & wxPGCC_MF_ON_BUTTON )
            {
                m_btnState |= wxCONTROL_PRESSED;
                Refresh();

                if ( !(m_iFlags & wxPGCC_POPUP_ON_MOUSE_UP) )
                    OnButtonClick();
                else
                    // If showing popup now, do not capture mouse or there will be interference
                    CaptureMouse();
            }
        }
        /*else
        {
            m_btnState = 0;
        }*/
    }
    else if ( type == wxEVT_LEFT_UP )
    {

        // Only accept event if mouse was left-press was previously accepted
        if ( HasCapture() )
            ReleaseMouse();

        if ( m_btnState & wxCONTROL_PRESSED )
        {
            // If mouse was inside, fire the click event.
            if ( m_iFlags & wxPGCC_POPUP_ON_MOUSE_UP )
            {
                if ( flags & wxPGCC_MF_ON_BUTTON )
                    OnButtonClick();
            }

            m_btnState &= ~(wxCONTROL_PRESSED);
            Refresh();
        }
    }
    else if ( type == wxEVT_LEAVE_WINDOW )
    {
        if ( m_btnState & (wxCONTROL_CURRENT|wxCONTROL_PRESSED) )
        {
            m_btnState &= ~(wxCONTROL_CURRENT);

            // Mouse hover ends
            if ( !m_isPopupShown )
            {
                m_btnState &= ~(wxCONTROL_PRESSED);
                Refresh();
            }
        }
    }
    else
        return false;

    return true;
}

// Conversion to double-clicks and some basic filtering
// returns true if event was consumed or filtered
bool wxPGComboControlBase::PreprocessMouseEvent( wxMouseEvent& event,
                                                 int WXUNUSED(flags) )
{
    wxLongLong t = ::wxGetLocalTimeMillis();
    int evtType = event.GetEventType();

    if ( m_isPopupShown &&
         ( evtType == wxEVT_LEFT_DOWN || evtType == wxEVT_RIGHT_DOWN ) )
    {
        HidePopup();
        return true;
    }

    //
    // Generate our own double-clicks
    // (to allow on-focus dc-event on double-clicks instead of triple-clicks)
    /*if ( (m_windowStyle & wxPGCC_DCLICK_CYCLES) &&
         !m_isPopupShown &&
         //!(handlerFlags & wxPGCC_MF_ON_BUTTON) )
         !(flags & wxPGCC_MF_ON_BUTTON) )
    {
        if ( evtType == wxEVT_LEFT_DOWN )
        {
            // Set value to avoid up-events without corresponding downs
            m_downReceived = true;
        }
        else if ( evtType == wxEVT_LEFT_DCLICK )
        {
            // We'll make our own double-clicks
            //evtType = 0;
            event.SetEventType(0);
            return true;
        }
        else if ( evtType == wxEVT_LEFT_UP )
        {
            if ( m_downReceived || m_timeLastMouseUp == 1 )
            {
                wxLongLong timeFromLastUp = (t-m_timeLastMouseUp);

                if ( timeFromLastUp < DOUBLE_CLICK_CONVERSION_TRESHOLD )
                {
                    //type = wxEVT_LEFT_DCLICK;
                    event.SetEventType(wxEVT_LEFT_DCLICK);
                    m_timeLastMouseUp = 1;
                }
                else
                {
                    m_timeLastMouseUp = t;
                }

                //m_downReceived = false;
            }
        }
    }*/

    // Filter out clicks on button immediately after popup dismiss (Windows like behaviour)
    if ( evtType == wxEVT_LEFT_DOWN && t < m_timeCanAcceptClick )
    {
        event.SetEventType(0);
        return true;
    }

    return false;
}

void wxPGComboControlBase::HandleNormalMouseEvent( wxMouseEvent& event )
{
    int evtType = event.GetEventType();

    if ( (evtType == wxEVT_LEFT_DOWN || evtType == wxEVT_LEFT_DCLICK) &&
         (m_windowStyle & wxCB_READONLY) )
    {
        if ( m_isPopupShown )
        {
    #if !wxUSE_POPUPWIN
        // Normally do nothing - evt handler should close it for us
      #if ALLOW_FAKE_POPUP
        if ( m_fakePopupUsage == 2 )
            HidePopup();
      #endif
    #elif !USE_TRANSIENT_POPUP
            // Click here always hides the popup.
            HidePopup();
    #endif
        }
        else
        {
            if ( !(m_windowStyle & wxPGCC_DCLICK_CYCLES) )
            {
                // In read-only mode, clicking the text is the
                // same as clicking the button.
                OnButtonClick();
            }
            else if ( /*evtType == wxEVT_LEFT_UP || */evtType == wxEVT_LEFT_DCLICK )
            {
                //if ( m_popupInterface->CycleValue() )
                //    Refresh();
                if ( m_popupInterface )
                    m_popupInterface->OnComboDoubleClick();
            }
        }
    }
    else
    if ( m_isPopupShown )
    {
        // relay (some) mouse events to the popup
        if ( evtType == wxEVT_MOUSEWHEEL )
            m_popup->AddPendingEvent(event);
    }
    else if ( evtType )
        event.Skip();
}

void wxPGComboControlBase::OnKeyEvent( wxKeyEvent& event )
{
    int keycode = event.GetKeyCode();

    if ( keycode == WXK_TAB &&
         !IsPopupShown() )
    {
        wxNavigationKeyEvent evt;
        evt.SetFlags(wxNavigationKeyEvent::FromTab|
                     (!event.ShiftDown()?wxNavigationKeyEvent::IsForward:
                                         wxNavigationKeyEvent::IsBackward));
        evt.SetEventObject(this);
        GetParent()->GetEventHandler()->AddPendingEvent(evt);
        return;
    }

    if ( IsPopupShown() )
    {
        // pass it to the popped up control
        GetPopupControl()->AddPendingEvent(event);
    }
    else // no popup
    {
        int comboStyle = GetWindowStyle();
        wxPGComboPopup* popupInterface = GetPopup();

        if ( !popupInterface )
        {
            event.Skip();
            return;
        }

        if ( (comboStyle & wxCB_READONLY) ||
             ( keycode != WXK_RIGHT && keycode != WXK_LEFT )
            )
        {
            // Alternate keys: UP and DOWN show the popup instead of cycling
            if ( (comboStyle & wxPGCC_ALT_KEYS) )
            {
                if ( keycode == WXK_UP || keycode == WXK_DOWN )
                {
                    OnButtonClick();
                    return;
                }
                else
                    event.Skip();
            }
            else
                popupInterface->OnComboKeyEvent(event);
        }
        else
            event.Skip();
    }
}

void wxPGComboControlBase::OnFocusEvent( wxFocusEvent& event )
{
    if ( event.GetEventType() == wxEVT_SET_FOCUS )
    {
        if ( m_text && m_text != ::wxWindow::FindFocus() )
        {
            m_skipTextCtrlFocusEvents++;
            m_text->SetFocus();
        }
    }

    Refresh();
}

void wxPGComboControlBase::OnSysColourChanged(wxSysColourChangedEvent& WXUNUSED(event))
{
    OnThemeChange();
    // indentation may also have changed
    if ( !(m_iFlags & wxPGCC_IFLAG_INDENT_SET) )
        m_absIndent = GetNativeTextIndent();
    RecalcAndRefresh();
}

// ----------------------------------------------------------------------------
// popup handling
// ----------------------------------------------------------------------------

// Create popup window and the child control
void wxPGComboControlBase::CreatePopup()
{
    wxPGComboPopup* popupInterface = m_popupInterface;
    wxWindow* popup;

    if ( !m_winPopup )
        m_winPopup = new wxPGComboPopupWindow( this, wxNO_BORDER );

    popupInterface->Create(m_winPopup);
    m_popup = popup = popupInterface->GetControl();

    m_popupExtraHandler = new wxPGComboPopupExtraEventHandler(this);
    popup->PushEventHandler( m_popupExtraHandler );

    popupInterface->m_iFlags |= wxPGCP_IFLAG_CREATED;
}

void wxPGComboControlBase::SetPopup( wxPGComboPopup* iface )
{
    delete m_popupInterface;
    delete m_winPopup;

    m_popupInterface = iface;

#if ALLOW_FAKE_POPUP
    m_fakePopupUsage = 0;
#endif

    if ( !iface->LazyCreate() || m_winPopup )
    {
        CreatePopup();
        /*
        m_winPopup = new wxPGComboPopupWindow( this, wxNO_BORDER );

        // Create popup right away
        iface->Create(m_winPopup);
        m_popup = iface->GetControl();
        m_popupExtraHandler = new wxPGComboPopupExtraEventHandler(this);
        m_popup->PushEventHandler( m_popupExtraHandler );

        // Add interface as event handler
        //m_popup->PushEventHandler( iface );
        */

        // FIXME: This bypasses wxGTK popupwindow bug
        //   (i.e. window is not initially hidden when it should be)
        m_winPopup->Hide();

#if ALLOW_FAKE_POPUP
        m_fakePopupUsage = 1;
#endif
    }
    else
    {
        m_popup = (wxWindow*) NULL;
    }

    // This must be after creation
    if ( m_valueString )
        iface->SetStringValue(m_valueString);

}

void wxPGComboControlBase::OnButtonClick()
{
    // Derived classes can override this method for totally custom
    // popup action
    ShowPopup();
}

void wxPGComboControlBase::ShowPopup()
{
    wxCHECK_RET( m_popupInterface, wxT("no popup interface set for wxComboControl") );
    wxCHECK_RET( !IsPopupShown(), wxT("popup window already shown") );

    SetFocus();

    // Space above and below
    int screenHeight;
    wxPoint scrPos;
    int spaceAbove;
    int spaceBelow;
    int maxHeightPopup;
    wxSize ctrlSz = GetSize();

#if ALLOW_FAKE_POPUP

    int existingHeight = 200;
    if ( m_popup )
        existingHeight = m_popup->GetSize().y;

    int screenWidth;
    GetParent()->GetClientSize(&screenWidth,&screenHeight);
    screenWidth -= 2;
    scrPos = GetPosition();

    spaceAbove = scrPos.y - 2;
    spaceBelow = screenHeight - spaceAbove - ctrlSz.y - 4;

    maxHeightPopup = spaceBelow;
    if ( spaceAbove > spaceBelow )
        maxHeightPopup = spaceAbove;

    if ( maxHeightPopup >= existingHeight )
    {
        if ( m_winPopup && m_fakePopupUsage!=2 )
        {
            delete m_winPopup;
            m_winPopup = (wxWindow*) NULL;
            m_popup = (wxWindow*) NULL;
        }
        m_fakePopupUsage = 2;
    }
    else
    {
        if ( m_winPopup && m_fakePopupUsage!=1 )
        {
            delete m_winPopup;
            m_winPopup = (wxWindow*) NULL;
            m_popup = (wxWindow*) NULL;
        }
        m_fakePopupUsage = 1;
#else
    {
#endif

        screenHeight = wxSystemSettings::GetMetric( wxSYS_SCREEN_Y );
        scrPos = GetParent()->ClientToScreen(GetPosition());

        spaceAbove = scrPos.y;
        spaceBelow = screenHeight - spaceAbove - ctrlSz.y;

        maxHeightPopup = spaceBelow;
        if ( spaceAbove > spaceBelow )
            maxHeightPopup = spaceAbove;

    }

    // Width
    int widthPopup = ctrlSz.x + m_extLeft + m_extRight;

    if ( widthPopup < m_widthMinPopup )
        widthPopup = m_widthMinPopup;

    wxWindow* winPopup = m_winPopup;
    wxWindow* popup;

    // Need to disable tab traversal of parent
    //
    // NB: This is to fix a bug in wxMSW. In theory it could also be fixed
    //     by, for instance, adding check to window.cpp:wxWindowMSW::MSWProcessMessage
    //     that if transient popup is open, then tab traversal is to be ignored.
    //     However, I think this code would still be needed for cases where
    //     transient popup doesn't work yet (wxWINCE?).
    wxWindow* parent = GetParent();
    int parentFlags = parent->GetWindowStyle();
    if ( parentFlags & wxTAB_TRAVERSAL )
    {
        parent->SetWindowStyle( parentFlags & ~(wxTAB_TRAVERSAL) );
        m_iFlags |= wxPGCC_IFLAG_PARENT_TAB_TRAVERSAL;
    }

    if ( !winPopup )
    {
#if ALLOW_FAKE_POPUP
        if ( m_fakePopupUsage == 2 )
        {
            winPopup = new wxWindow();
        #ifdef __WXMSW__
            // Only wxMSW supports this
            winPopup->Hide();