gtk.cpp

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

    // for a mono bitmap he colours it appears in depends on the current text
    // colours, so set them correctly
    wxColour colFgOld;
    if ( bmpLineWrap.GetDepth() == 1 )
    {
        colFgOld = dc.GetTextForeground();

        // FIXME: I wonder what should we do if the background is black too?
        dc.SetTextForeground(*wxBLACK);
    }

    dc.DrawBitmap(bmpLineWrap,
                  rect.x, rect.y + (rect.height - bmpLineWrap.GetHeight())/2);

    if ( colFgOld.Ok() )
    {
        // restore old colour
        dc.SetTextForeground(colFgOld);
    }
}

#endif // wxUSE_TEXTCTRL

// ----------------------------------------------------------------------------
// notebook
// ----------------------------------------------------------------------------

#if wxUSE_NOTEBOOK

void wxGTKRenderer::DrawTab(wxDC& dc,
                            const wxRect& rectOrig,
                            wxDirection dir,
                            const wxString& label,
                            const wxBitmap& bitmap,
                            int flags,
                            int indexAccel)
{
    #define SELECT_FOR_VERTICAL(X,Y) ( isVertical ? Y : X )
    #define REVERSE_FOR_VERTICAL(X,Y) \
        SELECT_FOR_VERTICAL(X,Y)      \
        ,                             \
        SELECT_FOR_VERTICAL(Y,X)

    wxRect rect = rectOrig;

    bool isVertical = ( dir == wxLEFT ) || ( dir == wxRIGHT );

    // the current tab is drawn indented (to the top for default case) and
    // bigger than the other ones
    const wxSize indent = GetTabIndent();
    if ( flags & wxCONTROL_SELECTED )
    {
        rect.Inflate( SELECT_FOR_VERTICAL( indent.x , 0),
                      SELECT_FOR_VERTICAL( 0, indent.y ));
        switch ( dir )
        {
            default:
                wxFAIL_MSG(_T("invaild notebook tab orientation"));
                // fall through

            case wxTOP:
                rect.y -= indent.y;
                // fall through
            case wxBOTTOM:
                rect.height += indent.y;
                break;

            case wxLEFT:
                rect.x -= indent.x;
                // fall through
            case wxRIGHT:
                rect.width += indent.x;
                break;
        }
    }

    // selected tab has different colour
    wxColour col = flags & wxCONTROL_SELECTED
                        ? wxSCHEME_COLOUR(m_scheme, SHADOW_IN)
                        : wxSCHEME_COLOUR(m_scheme, SCROLLBAR);
    DrawSolidRect(dc, col, rect);

    if ( flags & wxCONTROL_FOCUSED )
    {
        // draw the focus rect
        wxRect rectBorder = rect;
        rectBorder.Deflate(4, 3);
        if ( dir == wxBOTTOM )
            rectBorder.Offset(0, -1);
        if ( dir == wxRIGHT )
            rectBorder.Offset(-1, 0);

        DrawRect(dc, &rectBorder, m_penBlack);
    }

    // draw the text, image and the focus around them (if necessary)
    wxRect rectLabel( REVERSE_FOR_VERTICAL(rect.x,rect.y),
                      REVERSE_FOR_VERTICAL(rect.width,rect.height)
                    );
    rectLabel.Deflate(1, 1);
    if ( isVertical )
    {
        // draw it horizontally into memory and rotate for screen
        wxMemoryDC dcMem;
        wxBitmap bitmapRotated,
                 bitmapMem( rectLabel.x + rectLabel.width,
                            rectLabel.y + rectLabel.height );
        dcMem.SelectObject(bitmapMem);
        dcMem.SetBackground(dc.GetBackground());
        dcMem.SetFont(dc.GetFont());
        dcMem.SetTextForeground(dc.GetTextForeground());
        dcMem.Clear();
        bitmapRotated =
#if wxUSE_IMAGE
                        wxBitmap( wxImage( bitmap.ConvertToImage() ).Rotate90(dir==wxLEFT) )
#else
                        bitmap
#endif // wxUSE_IMAGE
                        ;
        dcMem.DrawLabel(label, bitmapRotated, rectLabel, wxALIGN_CENTRE, indexAccel);
        dcMem.SelectObject(wxNullBitmap);
        bitmapMem = bitmapMem.GetSubBitmap(rectLabel);
#if wxUSE_IMAGE
        bitmapMem = wxBitmap(wxImage(bitmapMem.ConvertToImage()).Rotate90(dir==wxRIGHT))
#endif
                    ;

        dc.DrawBitmap(bitmapMem, rectLabel.y, rectLabel.x, false);
    }
    else
    {
        dc.DrawLabel(label, bitmap, rectLabel, wxALIGN_CENTRE, indexAccel);
    }

    // now draw the tab itself
    wxCoord x = SELECT_FOR_VERTICAL(rect.x,rect.y),
            y = SELECT_FOR_VERTICAL(rect.y,rect.x),
            x2 = SELECT_FOR_VERTICAL(rect.GetRight(),rect.GetBottom()),
            y2 = SELECT_FOR_VERTICAL(rect.GetBottom(),rect.GetRight());
    switch ( dir )
    {
        default:
            // default is top
        case wxLEFT:
            // left orientation looks like top but IsVertical makes x and y reversed
        case wxTOP:
            // top is not vertical so use coordinates in written order
            dc.SetPen(m_penHighlight);
            dc.DrawLine(REVERSE_FOR_VERTICAL(x, y2),
                        REVERSE_FOR_VERTICAL(x, y));
            dc.DrawLine(REVERSE_FOR_VERTICAL(x + 1, y),
                        REVERSE_FOR_VERTICAL(x2, y));

            dc.SetPen(m_penBlack);
            dc.DrawLine(REVERSE_FOR_VERTICAL(x2, y2),
                        REVERSE_FOR_VERTICAL(x2, y));

            dc.SetPen(m_penDarkGrey);
            dc.DrawLine(REVERSE_FOR_VERTICAL(x2 - 1, y2),
                        REVERSE_FOR_VERTICAL(x2 - 1, y + 1));

            if ( flags & wxCONTROL_SELECTED )
            {
                dc.SetPen(m_penLightGrey);

                // overwrite the part of the border below this tab
                dc.DrawLine(REVERSE_FOR_VERTICAL(x + 1, y2 + 1),
                            REVERSE_FOR_VERTICAL(x2 - 1, y2 + 1));

                // and the shadow of the tab to the left of us
                dc.DrawLine(REVERSE_FOR_VERTICAL(x + 1, y + 2),
                            REVERSE_FOR_VERTICAL(x + 1, y2 + 1));
            }
            break;

        case wxRIGHT:
            // right orientation looks like bottom but IsVertical makes x and y reversed
        case wxBOTTOM:
            // bottom is not vertical so use coordinates in written order
            dc.SetPen(m_penHighlight);

            // we need to continue one pixel further to overwrite the corner of
            // the border for the selected tab
            dc.DrawLine(REVERSE_FOR_VERTICAL(x, y - (flags & wxCONTROL_SELECTED ? 1 : 0)),
                        REVERSE_FOR_VERTICAL(x, y2));

            // it doesn't work like this (TODO: implement it properly)
#if 0
            // erase the corner of the tab to the right
            dc.SetPen(m_penLightGrey);
            dc.DrawPoint(REVERSE_FOR_VERTICAL(x2 - 1, y - 2));
            dc.DrawPoint(REVERSE_FOR_VERTICAL(x2 - 2, y - 2));
            dc.DrawPoint(REVERSE_FOR_VERTICAL(x2 - 2, y - 1));
#endif // 0

            dc.SetPen(m_penBlack);
            dc.DrawLine(REVERSE_FOR_VERTICAL(x + 1, y2),
                        REVERSE_FOR_VERTICAL(x2, y2));
            dc.DrawLine(REVERSE_FOR_VERTICAL(x2, y),
                        REVERSE_FOR_VERTICAL(x2, y2));

            dc.SetPen(m_penDarkGrey);
            dc.DrawLine(REVERSE_FOR_VERTICAL(x + 2, y2 - 1),
                        REVERSE_FOR_VERTICAL(x2 - 1, y2 - 1));
            dc.DrawLine(REVERSE_FOR_VERTICAL(x2 - 1, y),
                        REVERSE_FOR_VERTICAL(x2 - 1, y2));

            if ( flags & wxCONTROL_SELECTED )
            {
                dc.SetPen(m_penLightGrey);

                // overwrite the part of the (double!) border above this tab
                dc.DrawLine(REVERSE_FOR_VERTICAL(x + 1, y - 1),
                            REVERSE_FOR_VERTICAL(x2 - 1, y - 1));
                dc.DrawLine(REVERSE_FOR_VERTICAL(x + 1, y - 2),
                            REVERSE_FOR_VERTICAL(x2 - 1, y - 2));

                // and the shadow of the tab to the left of us
                dc.DrawLine(REVERSE_FOR_VERTICAL(x + 1, y2 - 1),
                            REVERSE_FOR_VERTICAL(x + 1, y - 1));
            }
            break;
    }
}

#endif // wxUSE_NOTEBOOK

// ----------------------------------------------------------------------------
// slider
// ----------------------------------------------------------------------------

#if wxUSE_SLIDER

wxSize wxGTKRenderer::GetSliderThumbSize(const wxRect& rect,
                                         int lenThumb,
                                         wxOrientation orient) const
{
    static const wxCoord SLIDER_THUMB_LENGTH = 30;

    wxSize size;

    wxRect rectShaft = GetSliderShaftRect(rect, lenThumb, orient);
    if ( orient == wxHORIZONTAL )
    {
        size.x = wxMin(SLIDER_THUMB_LENGTH, rectShaft.width);
        size.y = rectShaft.height;
    }
    else // vertical
    {
        size.y = wxMin(SLIDER_THUMB_LENGTH, rectShaft.height);
        size.x = rectShaft.width;
    }

    return size;
}

wxRect wxGTKRenderer::GetSliderShaftRect(const wxRect& rect,
                                         int WXUNUSED(lenThumb),
                                         wxOrientation WXUNUSED(orient),
                                         long WXUNUSED(style)) const
{
    return rect.Deflate(2*BORDER_THICKNESS, 2*BORDER_THICKNESS);
}

void wxGTKRenderer::DrawSliderShaft(wxDC& dc,
                                    const wxRect& rectOrig,
                                    int WXUNUSED(lenThumb),
                                    wxOrientation WXUNUSED(orient),
                                    int flags,
                                    long WXUNUSED(style),
                                    wxRect *rectShaft)
{
    wxRect rect = rectOrig;

    // draw the border first
    if ( flags & wxCONTROL_FOCUSED )
    {
        DrawRect(dc, &rect, m_penBlack);
    }
    else // not focused, normal
    {
        DrawAntiShadedRect(dc, &rect, m_penDarkGrey, m_penHighlight);
    }

    DrawAntiShadedRect(dc, &rect, m_penBlack, m_penLightGrey);

    // and the background
    DrawSolidRect(dc, wxSCHEME_COLOUR(m_scheme, SCROLLBAR), rect);

    if ( rectShaft )
        *rectShaft = rect;
}

void wxGTKRenderer::DrawSliderThumb(wxDC& dc,
                                    const wxRect& rectOrig,
                                    wxOrientation orient,
                                    int WXUNUSED(flags),
                                    long WXUNUSED(style))
{
    // draw the thumb border
    wxRect rect = rectOrig;
    DrawAntiRaisedBorder(dc, &rect);

    // draw the handle in the middle
    if ( orient == wxVERTICAL )
    {
        rect.height = 2*BORDER_THICKNESS;
        rect.y = rectOrig.y + (rectOrig.height - rect.height) / 2;
    }
    else // horz
    {
        rect.width = 2*BORDER_THICKNESS;
        rect.x = rectOrig.x + (rectOrig.width - rect.width) / 2;
    }

    DrawShadedRect(dc, &rect, m_penDarkGrey, m_penHighlight);
}

#endif // wxUSE_SLIDER

#if wxUSE_MENUS

// ----------------------------------------------------------------------------
// menu and menubar
// ----------------------------------------------------------------------------

// wxGTKMenuGeometryInfo: the wxMenuGeometryInfo used by wxGTKRenderer
class WXDLLEXPORT wxGTKMenuGeometryInfo : public wxMenuGeometryInfo
{
public:
    virtual wxSize GetSize() const { return m_size; }

    wxCoord GetLabelOffset() const { return m_ofsLabel; }
    wxCoord GetAccelOffset() const { return m_ofsAccel; }

    wxCoord GetItemHeight() const { return m_heightItem; }

private:
    // the total size of the menu
    wxSize m_size;

    // the offset of the start of the menu item label
    wxCoord m_ofsLabel;

    // the offset of the start of the accel label
    wxCoord m_ofsAccel;

    // the height of a normal (not separator) item
    wxCoord m_heightItem;

    friend wxMenuGeometryInfo *
        wxGTKRenderer::GetMenuGeometry(wxWindow *, const wxMenu&) const;
};

// FIXME: all constants are hardcoded but shouldn't be
static const wxCoord MENU_LEFT_MARGIN = 9;
static const wxCoord MENU_RIGHT_MARGIN = 6;

static const wxCoord MENU_HORZ_MARGIN = 6;
static const wxCoord MENU_VERT_MARGIN = 3;

// the margin around bitmap/check marks (on each side)
static const wxCoord MENU_BMP_MARGIN = 2;

// the margin between the labels and accel strings
static const wxCoord MENU_ACCEL_MARGIN = 8;

// the separator height in pixels: in fact, strangely enough, the real height
// is 2 but Windows adds one extra pixel in the bottom margin, so take it into
// account here
static const wxCoord MENU_SEPARATOR_HEIGHT = 3;

// the size of the standard checkmark bitmap
static const wxCoord MENU_CHECK_SIZE = 9;

void wxGTKRenderer::DrawMenuBarItem(wxDC& dc,
                                    const wxRect& rect,
                                    const wxString& label,
                                    int flags,
                                    int indexAccel)
{
    DoDrawMenuItem(dc, rect, label, flags, indexAccel);
}

void wxGTKRenderer::DrawMenuItem(wxDC& dc,
                                 wxCoord y,
                                 const wxMenuGeometryInfo& gi,
                                 const wxString& label,
                                 const wxString& accel,
                                 const wxBitmap& bitmap,
                                 int flags,
                                 int indexAccel)
{
    const wxGTKMenuGeometryInfo& geomInfo = (const wxGTKMenuGeometryInfo&)gi;

    wxRect rect;
    rect.x = 0;
    rect.y = y;
    rect.width = geomInfo.GetSize().x;
    rect.height = geomInfo.GetItemHeight();

    DoDrawMenuItem(dc, rect, label, flags, indexAccel, accel, bitmap, &geomInfo);
}

void wxGTKRenderer::DoDrawMenuItem(wxDC& dc,
                                   const wxRect& rectOrig,
                                   const wxString& label,
                                   int flags,
                                   int indexAccel,
                                   const wxString& accel,
                                   const wxBitmap& bitmap,
                                   const wxGTKMenuGeometryInfo *geometryInfo)
{
    wxRect rect = rectOrig;