listctrl.cpp

电驴的MAC源代码

    wxListItemData *item = node->GetData();
    return item->GetAttr();
}

void wxListLineData::SetAttr(wxListItemAttr *attr)
{
    wxListItemDataList::compatibility_iterator node = m_items.GetFirst();
    wxCHECK_RET( node, _T("invalid column index in SetAttr()") );

    wxListItemData *item = node->GetData();
    item->SetAttr(attr);
}

bool wxListLineData::SetAttributes(wxDC *dc,
                                   const wxListItemAttr *attr,
                                   bool highlighted)
{
    wxWindow *listctrl = m_owner->GetParent();

    // fg colour

    // don't use foreground colour for drawing highlighted items - this might
    // make them completely invisible (and there is no way to do bit
    // arithmetics on wxColour, unfortunately)
    wxColour colText;
    if ( highlighted )
#ifdef __WXMAC__
    {
        if (m_owner->HasFocus()
#ifdef __WXMAC__
                && IsControlActive( (ControlRef)m_owner->GetHandle() )
#endif
        )
            colText = *wxWHITE;
        else
            colText = *wxBLACK;
    }
#else
        colText = wxSystemSettings::GetColour(wxSYS_COLOUR_HIGHLIGHTTEXT);
#endif
    else if ( attr && attr->HasTextColour() )
        colText = attr->GetTextColour();
    else
        colText = listctrl->GetForegroundColour();

    dc->SetTextForeground(colText);

    // font
    wxFont font;
    if ( attr && attr->HasFont() )
        font = attr->GetFont();
    else
        font = listctrl->GetFont();

    dc->SetFont(font);

    // bg colour
    bool hasBgCol = attr && attr->HasBackgroundColour();
    if ( highlighted || hasBgCol )
    {
        if ( highlighted )
            dc->SetBrush( *m_owner->GetHighlightBrush() );
        else
            dc->SetBrush(wxBrush(attr->GetBackgroundColour(), wxSOLID));

        dc->SetPen( *wxTRANSPARENT_PEN );

        return true;
    }

    return false;
}

void wxListLineData::Draw( wxDC *dc )
{
    wxListItemDataList::compatibility_iterator node = m_items.GetFirst();
    wxCHECK_RET( node, _T("no subitems at all??") );

    bool highlighted = IsHighlighted();

    wxListItemAttr *attr = GetAttr();

    if ( SetAttributes(dc, attr, highlighted) )
#if ( !defined(__WXGTK20__) && !defined(__WXMAC__) )
    {
        dc->DrawRectangle( m_gi->m_rectHighlight );
    }
#else
    {
        if (highlighted)
        {
            int flags = wxCONTROL_SELECTED;
            if (m_owner->HasFocus()
#ifdef __WXMAC__
                && IsControlActive( (ControlRef)m_owner->GetHandle() )
#endif
            )
                flags |= wxCONTROL_FOCUSED;
            wxRendererNative::Get().DrawItemSelectionRect( m_owner, *dc, m_gi->m_rectHighlight, flags );

        }
        else
        {
            dc->DrawRectangle( m_gi->m_rectHighlight );
        }
    }
#endif

    // just for debugging to better see where the items are
#if 0
    dc->SetPen(*wxRED_PEN);
    dc->SetBrush(*wxTRANSPARENT_BRUSH);
    dc->DrawRectangle( m_gi->m_rectAll );
    dc->SetPen(*wxGREEN_PEN);
    dc->DrawRectangle( m_gi->m_rectIcon );
#endif

    wxListItemData *item = node->GetData();
    if (item->HasImage())
    {
        // centre the image inside our rectangle, this looks nicer when items
        // ae aligned in a row
        const wxRect& rectIcon = m_gi->m_rectIcon;

        m_owner->DrawImage(item->GetImage(), dc, rectIcon.x, rectIcon.y);
    }

    if (item->HasText())
    {
        const wxRect& rectLabel = m_gi->m_rectLabel;

        wxDCClipper clipper(*dc, rectLabel);
        dc->DrawText(item->GetText(), rectLabel.x, rectLabel.y);
    }
}

void wxListLineData::DrawInReportMode( wxDC *dc,
                                       const wxRect& rect,
                                       const wxRect& rectHL,
                                       bool highlighted )
{
    // TODO: later we should support setting different attributes for
    //       different columns - to do it, just add "col" argument to
    //       GetAttr() and move these lines into the loop below
    wxListItemAttr *attr = GetAttr();
    if ( SetAttributes(dc, attr, highlighted) )
#if ( !defined(__WXGTK20__) && !defined(__WXMAC__) )
    {
        dc->DrawRectangle( rectHL );
    }
#else
    {
        if (highlighted)
        {
            int flags = wxCONTROL_SELECTED;
            if (m_owner->HasFocus()
#ifdef __WXMAC__
                && IsControlActive( (ControlRef)m_owner->GetHandle() )
#endif
            )
                flags |= wxCONTROL_FOCUSED;
            wxRendererNative::Get().DrawItemSelectionRect( m_owner, *dc, rectHL, flags );
        }
        else
        {
            dc->DrawRectangle( rectHL );
        }
    }
#endif

    wxCoord x = rect.x + HEADER_OFFSET_X,
            yMid = rect.y + rect.height/2;
#ifdef __WXGTK__
    // This probably needs to be done
    // on all platforms as the icons
    // otherwise nearly touch the border
    x += 2;
#endif

    size_t col = 0;
    for ( wxListItemDataList::compatibility_iterator node = m_items.GetFirst();
          node;
          node = node->GetNext(), col++ )
    {
        wxListItemData *item = node->GetData();

        int width = m_owner->GetColumnWidth(col);
        int xOld = x;
        x += width;

	// Fix for a bug in wxWidgets.
	// This has been reported as patch 1898914:
	// http://sourceforge.net/tracker/index.php?func=detail&aid=1898914&group_id=9863&atid=309863
	//
        // Prevents the drawing of images into the
        // next collumn, in case of small widths.
        wxDCClipper clipper(*dc, xOld, rect.y, width - 8, rect.height);

        if ( item->HasImage() )
        {
            int ix, iy;
            m_owner->GetImageSize( item->GetImage(), ix, iy );
            m_owner->DrawImage( item->GetImage(), dc, xOld, yMid - iy/2 );

            ix += IMAGE_MARGIN_IN_REPORT_MODE;

            xOld += ix;
            width -= ix;
        }

        if ( item->HasText() )
            DrawTextFormatted(dc, item->GetText(), col, xOld, yMid, width - 8);
    }
}

void wxListLineData::DrawTextFormatted(wxDC *dc,
                                       const wxString& textOrig,
                                       int col,
                                       int x,
                                       int yMid,
                                       int width)
{
    // we don't support displaying multiple lines currently (and neither does
    // wxMSW FWIW) so just merge all the lines
    wxString text(textOrig);
    text.Replace(_T("\n"), _T(" "));

    wxCoord w, h;
    dc->GetTextExtent(text, &w, &h);

    const wxCoord y = yMid - (h + 1)/2;

    wxDCClipper clipper(*dc, x, y, width, h);

    // determine if the string can fit inside the current width
    if (w <= width)
    {
        // it can, draw it using the items alignment
        wxListItem item;
        m_owner->GetColumn(col, item);
        switch ( item.GetAlign() )
        {
            case wxLIST_FORMAT_LEFT:
                // nothing to do
                break;

            case wxLIST_FORMAT_RIGHT:
                x += width - w;
                break;

            case wxLIST_FORMAT_CENTER:
                x += (width - w) / 2;
                break;

            default:
                wxFAIL_MSG( _T("unknown list item format") );
                break;
        }

        dc->DrawText(text, x, y);
    }
    else // otherwise, truncate and add an ellipsis if possible
    {
        // determine the base width
        wxString ellipsis(wxT("..."));
        wxCoord base_w;
        dc->GetTextExtent(ellipsis, &base_w, &h);

        // continue until we have enough space or only one character left
        wxCoord w_c, h_c;
        size_t len = text.length();
        wxString drawntext = text.Left(len);
        while (len > 1)
        {
            dc->GetTextExtent(drawntext.Last(), &w_c, &h_c);
            drawntext.RemoveLast();
            len--;
            w -= w_c;
            if (w + base_w <= width)
                break;
        }

        // if still not enough space, remove ellipsis characters
        while (ellipsis.length() > 0 && w + base_w > width)
        {
            ellipsis = ellipsis.Left(ellipsis.length() - 1);
            dc->GetTextExtent(ellipsis, &base_w, &h);
        }

        // now draw the text
        dc->DrawText(drawntext, x, y);
        dc->DrawText(ellipsis, x + w, y);
    }
}

bool wxListLineData::Highlight( bool on )
{
    wxCHECK_MSG( !IsVirtual(), false, _T("unexpected call to Highlight") );

    if ( on == m_highlighted )
        return false;

    m_highlighted = on;

    return true;
}

void wxListLineData::ReverseHighlight( void )
{
    Highlight(!IsHighlighted());
}

//-----------------------------------------------------------------------------
//  wxListHeaderWindow
//-----------------------------------------------------------------------------

BEGIN_EVENT_TABLE(wxListHeaderWindow,wxWindow)
    EVT_PAINT         (wxListHeaderWindow::OnPaint)
    EVT_MOUSE_EVENTS  (wxListHeaderWindow::OnMouse)
    EVT_SET_FOCUS     (wxListHeaderWindow::OnSetFocus)
END_EVENT_TABLE()

void wxListHeaderWindow::Init()
{
    m_currentCursor = (wxCursor *) NULL;
    m_isDragging = false;
    m_dirty = false;
}

wxListHeaderWindow::wxListHeaderWindow()
{
    Init();

    m_owner = (wxListMainWindow *) NULL;
    m_resizeCursor = (wxCursor *) NULL;
}

wxListHeaderWindow::wxListHeaderWindow( wxWindow *win,
                                        wxWindowID id,
                                        wxListMainWindow *owner,
                                        const wxPoint& pos,
                                        const wxSize& size,
                                        long style,
                                        const wxString &name )
                  : wxWindow( win, id, pos, size, style, name )
{
    Init();

    m_owner = owner;
    m_resizeCursor = new wxCursor( wxCURSOR_SIZEWE );

#if _USE_VISATTR
    wxVisualAttributes attr = wxPanel::GetClassDefaultAttributes();
    SetOwnForegroundColour( attr.colFg );
    SetOwnBackgroundColour( attr.colBg );
    if (!m_hasFont)
        SetOwnFont( attr.font );
#else
    SetOwnForegroundColour( wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT));
    SetOwnBackgroundColour( wxSystemSettings::GetColour(wxSYS_COLOUR_BTNFACE));
    if (!m_hasFont)
        SetOwnFont( wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT ));
#endif
}

wxListHeaderWindow::~wxListHeaderWindow()
{
    delete m_resizeCursor;
}

#ifdef __WXUNIVERSAL__
#include <wx/univ/renderer.h>
#include <wx/univ/theme.h>
#endif

// shift the DC origin to match the position of the main window horz
// scrollbar: this allows us to always use logical coords
void wxListHeaderWindow::AdjustDC(wxDC& dc)
{
    int xpix;
    m_owner->GetScrollPixelsPerUnit( &xpix, NULL );

    int view_start;
    m_owner->GetViewStart( &view_start, NULL );


    int org_x = 0;
    int org_y = 0;
    dc.GetDeviceOrigin( &org_x, &org_y );

    // account for the horz scrollbar offset
#ifdef __WXGTK__
    if (GetLayoutDirection() == wxLayout_RightToLeft)
    {
        // Maybe we just have to check for m_signX
        // in the DC, but I leave the #ifdef __WXGTK__
        // for now
        dc.SetDeviceOrigin( org_x + (view_start * xpix), org_y );
    }
    else
#endif
        dc.SetDeviceOrigin( org_x - (view_start * xpix), org_y );
}

void wxListHeaderWindow::OnPaint( wxPaintEvent &WXUNUSED(event) )
{
    wxPaintDC dc( this );

    PrepareDC( dc );
    AdjustDC( dc );

    dc.SetFont( GetFont() );

    // width and height of the entire header window
    int w, h;
    GetClientSize( &w, &h );
    m_owner->CalcUnscrolledPosition(w, 0, &w, NULL);

    dc.SetBackgroundMode(wxTRANSPARENT);
    dc.SetTextForeground(GetForegroundColour());

    int x = HEADER_OFFSET_X;
    int numColumns = m_owner->GetColumnCount();
    wxListItem item;
    for ( int i = 0; i < numColumns && x < w; i++ )
    {
        m_owner->GetColumn( i, item );
        int wCol = item.m_width;

        int cw = wCol;
        int ch = h;

        int flags = 0;
        if (!m_parent->IsEnabled())
            flags |= wxCONTROL_DISABLED;

// NB: The code below is not really Mac-specific, but since we are close
// to 2.8 release and I don't have time to test on other platforms, I
// defined this only for wxMac. If this behavior is desired on
// other platforms, please go ahead and revise or remove the #ifdef.
#ifdef __WXMAC__
        if ( !m_owner->IsVirtual() && (item.m_mask & wxLIST_MASK_STATE) &&
                (item.m_state & wxLIST_STATE_SELECTED) )
            flags |= wxCONTROL_SELECTED;
#endif

        wxRendererNative::Get().DrawHeaderButton
                                (
                                    this,
                                    dc,
                                    wxRect(x, HEADER_OFFSET_Y, cw, ch),
                                    flags
                                );

        // see if we have enough space for the column label

        // for this we need the width of the text
        wxCoord wLabel;
        wxCoord hLabel;
        dc.GetTextExtent(item.GetText(), &wLabel, &hLabel);
        wLabel += 2 * EXTRA_WIDTH;