listbox.cpp

很牛的GUI源码wxWidgets-2.8.0.zip 可在多种平台下运行.

}

int wxListBox::DoListHitTest(const wxPoint& inpoint) const
{
    OSStatus err;

    // There are few reasons why this is complicated:
    // 1) There is no native HitTest function for Mac
    // 2) GetDataBrowserItemPartBounds only works on visible items
    // 3) We can't do it through GetDataBrowserTableView[Item]RowHeight
    //    because what it returns is basically inaccurate in the context
    //    of the coordinates we want here, but we use this as a guess
    //    for where the first visible item lies

    wxPoint point = inpoint;

    // interestingly enough 10.2 (and below?) have GetDataBrowserItemPartBounds
    // giving root window coordinates but 10.3 and above give client coordinates
    // so we only compare using root window coordinates on 10.3 and up
    if ( UMAGetSystemVersion() < 0x1030 )
        MacClientToRootWindow(&point.x, &point.y);

    // get column property ID (req. for call to itempartbounds)
    DataBrowserTableViewColumnID colId = 0;
    err = GetDataBrowserTableViewColumnProperty(m_peer->GetControlRef(), 0, &colId);
    wxCHECK_MSG(err == noErr, wxNOT_FOUND, wxT("Unexpected error from GetDataBrowserTableViewColumnProperty"));

    // OK, first we need to find the first visible item we have -
    // this will be the "low" for our binary search. There is no real
    // easy way around this, as we will need to do a SLOW linear search
    // until we find a visible item, but we can do a cheap calculation
    // via the row height to speed things up a bit
    UInt32 scrollx, scrolly;
    err = GetDataBrowserScrollPosition(m_peer->GetControlRef(), &scrollx, &scrolly);
    wxCHECK_MSG(err == noErr, wxNOT_FOUND, wxT("Unexpected error from GetDataBrowserScrollPosition"));

    UInt16 height;
    err = GetDataBrowserTableViewRowHeight(m_peer->GetControlRef(), &height);
    wxCHECK_MSG(err == noErr, wxNOT_FOUND, wxT("Unexpected error from GetDataBrowserTableViewRowHeight"));

    // these indices are 0-based, as usual, so we need to add 1 to them when
    // passing them to data browser functions which use 1-based indices
    int low = scrolly / height,
        high = GetCount() - 1;

    // search for the first visible item (note that the scroll guess above
    // is the low bounds of where the item might lie so we only use that as a
    // starting point - we should reach it within 1 or 2 iterations of the loop)
    while ( low <= high )
    {
        Rect bounds;
        err = GetDataBrowserItemPartBounds(
            m_peer->GetControlRef(), low + 1, colId,
            kDataBrowserPropertyEnclosingPart,
            &bounds); // note +1 to translate to Mac ID
        if ( err == noErr )
            break;

        // errDataBrowserItemNotFound is expected as it simply means that the
        // item is not currently visible -- but other errors are not
        wxCHECK_MSG( err == errDataBrowserItemNotFound, wxNOT_FOUND,
                     wxT("Unexpected error from GetDataBrowserItemPartBounds") );

        low++;
    }

    // NOW do a binary search for where the item lies, searching low again if
    // we hit an item that isn't visible
    while ( low <= high )
    {
        int mid = (low + high) / 2;

        Rect bounds;
        err = GetDataBrowserItemPartBounds(
            m_peer->GetControlRef(), mid + 1, colId,
            kDataBrowserPropertyEnclosingPart,
            &bounds); //note +1 to trans to mac id
        wxCHECK_MSG( err == noErr || err == errDataBrowserItemNotFound,
                     wxNOT_FOUND,
                     wxT("Unexpected error from GetDataBrowserItemPartBounds") );

        if ( err == errDataBrowserItemNotFound )
        {
            // item not visible, attempt to find a visible one
            // search lower
            high = mid - 1;
        }
        else // visible item, do actual hitttest
        {
            // if point is within the bounds, return this item (since we assume
            // all x coords of items are equal we only test the x coord in
            // equality)
            if ((point.x >= bounds.left && point.x <= bounds.right) &&
                (point.y >= bounds.top && point.y <= bounds.bottom) )
            {
                // found!
                return mid;
            }

            if ( point.y < bounds.top )
                // index(bounds) greater then key(point)
                high = mid - 1;
            else
                // index(bounds) less then key(point)
                low = mid + 1;
        }
    }

    return wxNOT_FOUND;
}

// ============================================================================
// data browser based implementation
// ============================================================================

wxMacListBoxItem::wxMacListBoxItem()
        :wxMacDataItem()
{
}

wxMacListBoxItem::~wxMacListBoxItem()
{
}

void wxMacListBoxItem::Notification(wxMacDataItemBrowserControl *owner ,
    DataBrowserItemNotification message,
    DataBrowserItemDataRef itemData ) const
{
    wxMacDataBrowserListControl *lb = wxDynamicCast(owner,wxMacDataBrowserListControl);

    // we want to depend on as little as possible to make sure tear-down of controls is safe

    if ( message == kDataBrowserItemRemoved)
    {
        if ( lb != NULL && lb->GetClientDataType() == wxClientData_Object )
        {
            delete (wxClientData*) (m_data);
        }

        delete this;
        return;
    }

    wxListBox *list = wxDynamicCast( owner->GetPeer() , wxListBox );
    wxCHECK_RET( list != NULL , wxT("Listbox expected"));

    bool trigger = false;
    wxCommandEvent event( wxEVT_COMMAND_LISTBOX_SELECTED, list->GetId() );
    switch (message)
    {
        case kDataBrowserItemDeselected:
            if ( list->HasMultipleSelection() )
                trigger = !lb->IsSelectionSuppressed();
            break;

        case kDataBrowserItemSelected:
            trigger = !lb->IsSelectionSuppressed();
            break;

        case kDataBrowserItemDoubleClicked:
            event.SetEventType( wxEVT_COMMAND_LISTBOX_DOUBLECLICKED );
            trigger = true;
            break;

        default:
            break;
    }

    if ( trigger )
    {
        event.SetEventObject( list );
        if ( list->HasClientObjectData() )
            event.SetClientObject( (wxClientData*) m_data );
        else if ( list->HasClientUntypedData() )
            event.SetClientData( m_data );
        event.SetString( m_label );
        event.SetInt( owner->GetLineFromItem( this ) );
        event.SetExtraLong( list->HasMultipleSelection() ? message == kDataBrowserItemSelected : true );

        // direct notification is not always having the listbox GetSelection()
        // having in synch with event, so use wxPostEvent instead
        // list->GetEventHandler()->ProcessEvent(event);

        wxPostEvent( list->GetEventHandler(), event );
    }
}

IMPLEMENT_DYNAMIC_CLASS( wxMacDataBrowserListControl , wxMacDataItemBrowserControl )

wxMacDataBrowserListControl::wxMacDataBrowserListControl( wxWindow *peer, const wxPoint& pos, const wxSize& size, long style)
    : wxMacDataItemBrowserControl( peer, pos, size, style )
{
    OSStatus err = noErr;
    m_clientDataItemsType = wxClientData_None;
    if ( style & wxLB_SORT )
        m_sortOrder = SortOrder_Text_Ascending;

    DataBrowserSelectionFlags  options = kDataBrowserDragSelect;
    if ( style & wxLB_MULTIPLE )
    {
        options |= kDataBrowserAlwaysExtendSelection | kDataBrowserCmdTogglesSelection;
    }
    else if ( style & wxLB_EXTENDED )
    {
        options |= kDataBrowserCmdTogglesSelection;
    }
    else
    {
        options |= kDataBrowserSelectOnlyOne;
    }
    err = SetSelectionFlags( options );
    verify_noerr( err );

    DataBrowserListViewColumnDesc columnDesc;
    columnDesc.headerBtnDesc.titleOffset = 0;
    columnDesc.headerBtnDesc.version = kDataBrowserListViewLatestHeaderDesc;

    columnDesc.headerBtnDesc.btnFontStyle.flags =
        kControlUseFontMask | kControlUseJustMask;

    columnDesc.headerBtnDesc.btnContentInfo.contentType = kControlNoContent;
    columnDesc.headerBtnDesc.btnFontStyle.just = teFlushDefault;
    columnDesc.headerBtnDesc.btnFontStyle.font = kControlFontViewSystemFont;
    columnDesc.headerBtnDesc.btnFontStyle.style = normal;
    columnDesc.headerBtnDesc.titleString = NULL;

    columnDesc.headerBtnDesc.minimumWidth = 0;
    columnDesc.headerBtnDesc.maximumWidth = 10000;

    columnDesc.propertyDesc.propertyID = kTextColumnId;
    columnDesc.propertyDesc.propertyType = kDataBrowserTextType;
    columnDesc.propertyDesc.propertyFlags = kDataBrowserTableViewSelectionColumn;
#if MAC_OS_X_VERSION_MAX_ALLOWED > MAC_OS_X_VERSION_10_2
    columnDesc.propertyDesc.propertyFlags |= kDataBrowserListViewTypeSelectColumn;
#endif

    verify_noerr( AddColumn( &columnDesc, kDataBrowserListViewAppendColumn ) );

    columnDesc.headerBtnDesc.minimumWidth = 0;
    columnDesc.headerBtnDesc.maximumWidth = 0;
    columnDesc.propertyDesc.propertyID = kNumericOrderColumnId;
    columnDesc.propertyDesc.propertyType = kDataBrowserPropertyRelevanceRankPart;
    columnDesc.propertyDesc.propertyFlags = kDataBrowserTableViewSelectionColumn;
#if MAC_OS_X_VERSION_MAX_ALLOWED > MAC_OS_X_VERSION_10_2
    columnDesc.propertyDesc.propertyFlags |= kDataBrowserListViewTypeSelectColumn;
#endif

    verify_noerr( AddColumn( &columnDesc, kDataBrowserListViewAppendColumn ) );

    SetDataBrowserSortProperty( m_controlRef , kTextColumnId);
    if ( m_sortOrder == SortOrder_Text_Ascending )
    {
        SetDataBrowserSortProperty( m_controlRef , kTextColumnId);
        SetDataBrowserSortOrder( m_controlRef , kDataBrowserOrderIncreasing);
    }
    else
    {
        SetDataBrowserSortProperty( m_controlRef , kNumericOrderColumnId);
        SetDataBrowserSortOrder( m_controlRef , kDataBrowserOrderIncreasing);
    }

    verify_noerr( AutoSizeColumns() );
    verify_noerr( SetHiliteStyle(kDataBrowserTableViewFillHilite ) );
    verify_noerr( SetHeaderButtonHeight( 0 ) );
    err = SetHasScrollBars( (style & wxHSCROLL) != 0 , true );
#if 0
    // shouldn't be necessary anymore under 10.2
    m_peer->SetData( kControlNoPart, kControlDataBrowserIncludesFrameAndFocusTag, (Boolean)false );
    m_peer->SetNeedsFocusRect( true );
#endif
}

wxMacDataBrowserListControl::~wxMacDataBrowserListControl()
{
}

wxWindow * wxMacDataBrowserListControl::GetPeer() const
{
    return wxDynamicCast( wxMacControl::GetPeer() , wxWindow );
}

wxMacDataItem* wxMacDataBrowserListControl::CreateItem()
{
    return new wxMacListBoxItem();
}

#if 0

// in case we need that one day

// ============================================================================
// HIView owner-draw-based implementation
// ============================================================================

static pascal void ListBoxDrawProc(
    ControlRef browser, DataBrowserItemID item, DataBrowserPropertyID property,
    DataBrowserItemState itemState, const Rect *itemRect, SInt16 depth, Boolean isColorDevice )
{
    CFStringRef cfString;
    ThemeDrawingState themeState;
    long systemVersion;

    GetThemeDrawingState( &themeState );
    cfString = CFStringCreateWithFormat( NULL, NULL, CFSTR("Row %d"), item );

    //  In this sample we handle the "selected" state; all others fall through to our "active" state
    if ( itemState == kDataBrowserItemIsSelected )
    {
        ThemeBrush colorBrushID;

        // TODO: switch over to wxSystemSettingsNative::GetColour() when kThemeBrushSecondaryHighlightColor
        // is incorporated Panther DB starts using kThemeBrushSecondaryHighlightColor
        // for inactive browser highlighting
        Gestalt( gestaltSystemVersion, &systemVersion );
        if ( (systemVersion >= 0x00001030) && !IsControlActive( browser ) )
            colorBrushID = kThemeBrushSecondaryHighlightColor;
        else
            colorBrushID = kThemeBrushPrimaryHighlightColor;

        // First paint the hilite rect, then the text on top
        SetThemePen( colorBrushID, 32, true );
        PaintRect( itemRect );
        SetThemeDrawingState( themeState, false );
    }

    DrawThemeTextBox( cfString, kThemeApplicationFont, kThemeStateActive, true, itemRect, teFlushDefault, NULL );
    SetThemeDrawingState( themeState, true );

    if ( cfString != NULL )
        CFRelease( cfString );
}

#endif


#endif // wxUSE_LISTBOX