metal.cpp

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

                    x1++;
                    x2++;
                }
                else
                {
                    x1--;
                    x2--;
                }
            }
        }

        // draw the shadow for the disabled one
        dcDisabled.SetPen(m_penHighlight);
        switch ( n )
        {
            case Arrow_Left:
                y1 += 2;
                dcDisabled.DrawLine(x1, y1, x2, y2);
                break;

            case Arrow_Right:
                x1 = ARROW_LENGTH - 1;
                y1 = (ARROW_WIDTH - 1)/2 + 1;
                x2 = 0;
                y2 = ARROW_WIDTH;
                dcDisabled.DrawLine(x1, y1, x2, y2);
                dcDisabled.DrawLine(++x1, y1, x2, ++y2);
                break;

            case Arrow_Up:
                x1 += 2;
                dcDisabled.DrawLine(x1, y1, x2, y2);
                break;

            case Arrow_Down:
                x1 = ARROW_WIDTH - 1;
                y1 = 1;
                x2 = (ARROW_WIDTH - 1)/2;
                y2 = ARROW_LENGTH;
                dcDisabled.DrawLine(x1, y1, x2, y2);
                dcDisabled.DrawLine(++x1, y1, x2, ++y2);
                break;

        }

        // create the inverted bitmap but only for the right arrow as we only
        // use it for the menus
        if ( n == Arrow_Right )
        {
            m_bmpArrows[Arrow_Inverted][n].Create(w, h);
            dcInverse.SelectObject(m_bmpArrows[Arrow_Inverted][n]);
            dcInverse.Clear();
            dcInverse.Blit(0, 0, w, h,
                          &dcNormal, 0, 0,
                          wxXOR);
            dcInverse.SelectObject(wxNullBitmap);

            mask = new wxMask(m_bmpArrows[Arrow_Inverted][n], *wxBLACK);
            m_bmpArrows[Arrow_Inverted][n].SetMask(mask);

            m_bmpArrows[Arrow_InvertedDisabled][n].Create(w, h);
            dcInverse.SelectObject(m_bmpArrows[Arrow_InvertedDisabled][n]);
            dcInverse.Clear();
            dcInverse.Blit(0, 0, w, h,
                          &dcDisabled, 0, 0,
                          wxXOR);
            dcInverse.SelectObject(wxNullBitmap);

            mask = new wxMask(m_bmpArrows[Arrow_InvertedDisabled][n], *wxBLACK);
            m_bmpArrows[Arrow_InvertedDisabled][n].SetMask(mask);
        }

        dcNormal.SelectObject(wxNullBitmap);
        dcDisabled.SelectObject(wxNullBitmap);

        mask = new wxMask(m_bmpArrows[Arrow_Normal][n], *wxWHITE);
        m_bmpArrows[Arrow_Normal][n].SetMask(mask);
        mask = new wxMask(m_bmpArrows[Arrow_Disabled][n], *wxWHITE);
        m_bmpArrows[Arrow_Disabled][n].SetMask(mask);

        m_bmpArrows[Arrow_Pressed][n] = m_bmpArrows[Arrow_Normal][n];
    }
}

void wxMetalRenderer::DrawScrollbarThumb(wxDC& dc,
                                         wxOrientation WXUNUSED(orient),
                                         const wxRect& rect,
                                         int WXUNUSED(flags))
{
    // we don't use the flags, the thumb never changes appearance
    wxRect rectThumb = rect;
    DrawArrowBorder(dc, &rectThumb);
    DrawMetal(dc, rectThumb);
}

void wxMetalRenderer::DrawScrollbarShaft(wxDC& dc,
                                         wxOrientation WXUNUSED(orient),
                                         const wxRect& rectBar,
                                         int WXUNUSED(flags))
{
    DrawMetal(dc, rectBar);
}

void wxMetalRenderer::GetComboBitmaps(wxBitmap *bmpNormal,
                                      wxBitmap * WXUNUSED(bmpFocus),
                                      wxBitmap *bmpPressed,
                                      wxBitmap *bmpDisabled)
{
    static const wxCoord widthCombo = 16;
    static const wxCoord heightCombo = 17;

    wxMemoryDC dcMem;

    if ( bmpNormal )
    {
        bmpNormal->Create(widthCombo, heightCombo);
        dcMem.SelectObject(*bmpNormal);
        DrawArrowButton(dcMem, wxRect(0, 0, widthCombo, heightCombo),
                        Arrow_Down, Arrow_Normal);
    }

    if ( bmpPressed )
    {
        bmpPressed->Create(widthCombo, heightCombo);
        dcMem.SelectObject(*bmpPressed);
        DrawArrowButton(dcMem, wxRect(0, 0, widthCombo, heightCombo),
                        Arrow_Down, Arrow_Pressed);
    }

    if ( bmpDisabled )
    {
        bmpDisabled->Create(widthCombo, heightCombo);
        dcMem.SelectObject(*bmpDisabled);
        DrawArrowButton(dcMem, wxRect(0, 0, widthCombo, heightCombo),
                        Arrow_Down, Arrow_Disabled);
    }
}

void wxMetalRenderer::DrawArrow(wxDC& dc,
                                wxDirection dir,
                                const wxRect& rect,
                                int flags)
{
    // get the bitmap for this arrow
    wxArrowDirection arrowDir;
    switch ( dir )
    {
        case wxLEFT:    arrowDir = Arrow_Left; break;
        case wxRIGHT:   arrowDir = Arrow_Right; break;
        case wxUP:      arrowDir = Arrow_Up; break;
        case wxDOWN:    arrowDir = Arrow_Down; break;

        default:
            wxFAIL_MSG(_T("unknown arrow direction"));
            return;
    }

    wxArrowStyle arrowStyle;
    if ( flags & wxCONTROL_PRESSED )
    {
        // can't be pressed and disabled
        arrowStyle = Arrow_Pressed;
    }
    else
    {
        arrowStyle = flags & wxCONTROL_DISABLED ? Arrow_Disabled : Arrow_Normal;
    }

    DrawArrowButton(dc, rect, arrowDir, arrowStyle);
}

//
// protected functions
//

void wxMetalRenderer::DrawArrowButton(wxDC& dc,
                                      const wxRect& rectAll,
                                      wxArrowDirection arrowDir,
                                      wxArrowStyle arrowStyle)
{
    wxRect rect = rectAll;
    DrawMetal( dc, rect );
    DrawArrowBorder(dc, &rect, arrowStyle == Arrow_Pressed);
    DrawArrow(dc, rect, arrowDir, arrowStyle);
}

void wxMetalRenderer::DrawRect(wxDC& dc, wxRect *rect, const wxPen& pen)
{
    // draw
    dc.SetPen(pen);
    dc.SetBrush(*wxTRANSPARENT_BRUSH);
    dc.DrawRectangle(*rect);

    // adjust the rect
    rect->Inflate(-1);
}

void wxMetalRenderer::DrawShadedRect(wxDC& dc, wxRect *rect,
                                     const wxPen& pen1, const wxPen& pen2)
{
    // draw the rectangle
    dc.SetPen(pen1);
    dc.DrawLine(rect->GetLeft(), rect->GetTop(),
                rect->GetLeft(), rect->GetBottom());
    dc.DrawLine(rect->GetLeft() + 1, rect->GetTop(),
                rect->GetRight(), rect->GetTop());
    dc.SetPen(pen2);
    dc.DrawLine(rect->GetRight(), rect->GetTop(),
                rect->GetRight(), rect->GetBottom());
    dc.DrawLine(rect->GetLeft(), rect->GetBottom(),
                rect->GetRight() + 1, rect->GetBottom());

    // adjust the rect
    rect->Inflate(-1);
}

void wxMetalRenderer::DrawArrowBorder(wxDC& dc, wxRect *rect, bool isPressed)
{
    if ( isPressed )
    {
        DrawRect(dc, rect, m_penDarkGrey);

        // the arrow is usually drawn inside border of width 2 and is offset by
        // another pixel in both directions when it's pressed - as the border
        // in this case is more narrow as well, we have to adjust rect like
        // this:
        rect->Inflate(-1);
        rect->x++;
        rect->y++;
    }
    else
    {
        DrawShadedRect(dc, rect, m_penLightGrey, m_penBlack);
        DrawShadedRect(dc, rect, m_penHighlight, m_penDarkGrey);
    }
}

void wxMetalRenderer::DrawArrow(wxDC& dc,
                                const wxRect& rect,
                                wxArrowDirection arrowDir,
                                wxArrowStyle arrowStyle)
{
    const wxBitmap& bmp = m_bmpArrows[arrowStyle][arrowDir];

    // under Windows the arrows always have the same size so just centre it in
    // the provided rectangle
    wxCoord x = rect.x + (rect.width - bmp.GetWidth()) / 2,
            y = rect.y + (rect.height - bmp.GetHeight()) / 2;

    // Windows does it like this...
    if ( arrowDir == Arrow_Left )
        x--;

    // draw it
    dc.DrawBitmap(bmp, x, y, true /* use mask */);
}

// ----------------------------------------------------------------------------
// metal gradient
// ----------------------------------------------------------------------------

void wxMetalRenderer::DrawMetal(wxDC &dc, const wxRect &rect )
{
    dc.SetPen(*wxTRANSPARENT_PEN);
    for (int y = rect.y; y < rect.height+rect.y; y++)
    {
       unsigned char intens = (unsigned char)(230 + 80 * (rect.y-y) / rect.height);
       dc.SetBrush( wxBrush( wxColour(intens,intens,intens), wxSOLID ) );
       dc.DrawRectangle( rect.x, y, rect.width, 1 );
    }
}

#endif // wxUSE_THEME_METAL