gtk.cpp

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

    {
        if ( flags & wxCONTROL_FOCUSED )
        {
            DrawRect(dc, &rect, m_penBlack);
            DrawAntiShadedRect(dc, &rect, m_penDarkGrey, m_penHighlight);
        }
        else // !focused
        {
            DrawInnerShadedRect(dc, &rect);
        }
    }

    if ( rectIn )
        *rectIn = rect;
}

void wxGTKRenderer::DrawButtonLabel(wxDC& dc,
                                    const wxString& label,
                                    const wxBitmap& image,
                                    const wxRect& rect,
                                    int flags,
                                    int alignment,
                                    int indexAccel,
                                    wxRect *rectBounds)
{
    // no focus rect around buttons label in GTK+
    wxStdRenderer::DrawButtonLabel(dc, label, image, rect, flags,
                                   alignment, indexAccel, rectBounds);
}

void wxGTKRenderer::DrawButtonBorder(wxDC& dc,
                                     const wxRect& rectTotal,
                                     int flags,
                                     wxRect *rectIn)
{
    wxRect rect = rectTotal;

    if ( flags & wxCONTROL_PRESSED )
    {
        // button pressed: draw a black border around it and an inward shade
        DrawRect(dc, &rect, m_penBlack);

        DrawInnerShadedRect(dc, &rect);
    }
    else // button not pressed
    {
        if ( flags & wxCONTROL_ISDEFAULT )
        {
            // TODO
        }

        if ( flags & wxCONTROL_FOCUSED )
        {
            // button is currently default: add an extra border around it
            DrawRect(dc, &rect, m_penBlack);
        }

        // now draw a normal button
        DrawShadedRect(dc, &rect, m_penHighlight, m_penBlack);
        DrawAntiShadedRect(dc, &rect, GetBackgroundColour(flags), m_penDarkGrey);
    }

    if ( rectIn )
        *rectIn = rect;
}

// ----------------------------------------------------------------------------
// lines and frames
// ----------------------------------------------------------------------------

void wxGTKRenderer::DrawFrameWithLabel(wxDC& dc,
                                       const wxString& label,
                                       const wxRect& rectFrame,
                                       const wxRect& rectTextOrig,
                                       int flags,
                                       int alignment,
                                       int indexAccel)
{
    wxRect rectText(rectTextOrig);
    rectText.Inflate(1, 0);

    wxRect rectLabel;
    DrawLabel(dc, label, rectText, flags, alignment, indexAccel, &rectLabel);
    rectLabel.x -= 1;
    rectLabel.width += 2;

    DrawFrameWithoutLabel(dc, rectFrame, rectLabel);

    // GTK+ does it like this
    dc.SetPen(m_penHighlight);
    dc.DrawPoint(rectText.x, rectFrame.y);
    dc.DrawPoint(rectText.x + rectLabel.width - 3, rectFrame.y);
}

// ----------------------------------------------------------------------------
// check/radion buttons
// ----------------------------------------------------------------------------

void wxGTKRenderer::DrawCheckItemBitmap(wxDC& dc,
                                        const wxBitmap& bitmap,
                                        const wxRect& rect,
                                        int flags)
{
    // never draw the focus rect around the check indicators here
    DrawCheckButton(dc, wxEmptyString, bitmap, rect, flags & ~wxCONTROL_FOCUSED);
}

void wxGTKRenderer::DrawUndeterminedBitmap(wxDC& dc,
                                           const wxRect& rectTotal,
                                           bool isPressed)
{
    // FIXME: For sure it is not GTK look but it is better than nothing.
    // Show me correct look and I will immediatelly make it better (ABX)
    wxRect rect = rectTotal;

    wxColour col1, col2;

    if ( isPressed )
    {
        col1 = wxSCHEME_COLOUR(m_scheme, SHADOW_DARK);
        col2 = wxSCHEME_COLOUR(m_scheme, CONTROL_PRESSED);
    }
    else
    {
        col1 = wxSCHEME_COLOUR(m_scheme, SHADOW_DARK);
        col2 = wxSCHEME_COLOUR(m_scheme, SHADOW_IN);
    }

    dc.SetPen(*wxTRANSPARENT_PEN);
    dc.SetBrush(col1);
    dc.DrawRectangle(rect);
    rect.Deflate(1);
    dc.SetBrush(col2);
    dc.DrawRectangle(rect);
}

void wxGTKRenderer::DrawUncheckBitmap(wxDC& dc,
                                      const wxRect& rectTotal,
                                      bool isPressed)
{
    wxRect rect = rectTotal;
    DrawAntiRaisedBorder(dc, &rect);

    wxColour col = wxSCHEME_COLOUR(m_scheme, SHADOW_IN);
    dc.SetPen(wxPen(col));
    dc.DrawPoint(rect.GetRight() - 1, rect.GetBottom() - 1);

    if ( isPressed )
        col = wxSCHEME_COLOUR(m_scheme, CONTROL_PRESSED);
    //else: it is SHADOW_IN, leave as is

    dc.SetPen(*wxTRANSPARENT_PEN);
    dc.SetBrush(col);
    dc.DrawRectangle(rect);
}

void wxGTKRenderer::DrawCheckBitmap(wxDC& dc, const wxRect& rectTotal)
{
    wxRect rect = rectTotal;
    DrawAntiShadedRect(dc, &rect, m_penDarkGrey, m_penHighlight);
    DrawShadedRect(dc, &rect, m_penBlack, m_penLightGrey);

    dc.SetPen(*wxTRANSPARENT_PEN);
    dc.SetBrush(wxSCHEME_COLOUR(m_scheme, CONTROL_PRESSED));
    dc.DrawRectangle(rect);
}

void wxGTKRenderer::DrawRadioBitmap(wxDC& dc,
                                    const wxRect& rect,
                                    int flags)
{
    wxCoord x = rect.x,
            y = rect.y,
            xRight = rect.GetRight(),
            yBottom = rect.GetBottom();

    wxCoord yMid = (y + yBottom) / 2;

    // then draw the upper half
    dc.SetPen(flags & wxCONTROL_CHECKED ? m_penDarkGrey : m_penHighlight);
    DrawUpZag(dc, x, xRight, yMid, y);
    DrawUpZag(dc, x + 1, xRight - 1, yMid, y + 1);

    bool drawIt = true;
    if ( flags & wxCONTROL_CHECKED )
        dc.SetPen(m_penBlack);
    else if ( flags & wxCONTROL_PRESSED )
        dc.SetPen(wxPen(wxSCHEME_COLOUR(m_scheme, CONTROL_PRESSED)));
    else // unchecked and unpressed
        drawIt = false;

    if ( drawIt )
        DrawUpZag(dc, x + 2, xRight - 2, yMid, y + 2);

    // and then the lower one
    dc.SetPen(flags & wxCONTROL_CHECKED ? m_penHighlight : m_penBlack);
    DrawDownZag(dc, x, xRight, yMid, yBottom);
    if ( !(flags & wxCONTROL_CHECKED) )
        dc.SetPen(m_penDarkGrey);
    DrawDownZag(dc, x + 1, xRight - 1, yMid, yBottom - 1);

    if ( !(flags & wxCONTROL_CHECKED) )
        drawIt = true; // with the same pen
    else if ( flags & wxCONTROL_PRESSED )
    {
        dc.SetPen(wxPen(wxSCHEME_COLOUR(m_scheme, CONTROL_PRESSED)));
        drawIt = true;
    }
    else // checked and unpressed
        drawIt = false;

    if ( drawIt )
        DrawDownZag(dc, x + 2, xRight - 2, yMid, yBottom - 2);
}

void wxGTKRenderer::DrawUpZag(wxDC& dc,
                              wxCoord x1,
                              wxCoord x2,
                              wxCoord y1,
                              wxCoord y2)
{
    wxCoord xMid = (x1 + x2) / 2;
    dc.DrawLine(x1, y1, xMid, y2);
    dc.DrawLine(xMid, y2, x2 + 1, y1 + 1);
}

void wxGTKRenderer::DrawDownZag(wxDC& dc,
                                wxCoord x1,
                                wxCoord x2,
                                wxCoord y1,
                                wxCoord y2)
{
    wxCoord xMid = (x1 + x2) / 2;
    dc.DrawLine(x1 + 1, y1 + 1, xMid, y2);
    dc.DrawLine(xMid, y2, x2, y1);
}

wxBitmap wxGTKRenderer::GetCheckBitmap(int flags)
{
    if ( !m_bitmapsCheckbox[0][0].Ok() )
    {
        // init the bitmaps once only
        wxRect rect;
        wxSize size = GetCheckBitmapSize();
        rect.width = size.x;
        rect.height = size.y;
        for ( int i = 0; i < 2; i++ )
        {
            for ( int j = 0; j < 3; j++ )
                m_bitmapsCheckbox[i][j].Create(rect.width, rect.height);
        }

        wxMemoryDC dc;

        // normal checked
        dc.SelectObject(m_bitmapsCheckbox[0][0]);
        DrawCheckBitmap(dc, rect);

        // normal unchecked
        dc.SelectObject(m_bitmapsCheckbox[0][1]);
        DrawUncheckBitmap(dc, rect, false);

        // normal undeterminated
        dc.SelectObject(m_bitmapsCheckbox[0][2]);
        DrawUndeterminedBitmap(dc, rect, false);

        // pressed checked
        m_bitmapsCheckbox[1][0] = m_bitmapsCheckbox[0][0];

        // pressed unchecked
        dc.SelectObject(m_bitmapsCheckbox[1][1]);
        DrawUncheckBitmap(dc, rect, true);

        // pressed undeterminated
        dc.SelectObject(m_bitmapsCheckbox[1][2]);
        DrawUndeterminedBitmap(dc, rect, true);
    }

    IndicatorState state;
    IndicatorStatus status;
    GetIndicatorsFromFlags(flags, state, status);

    // disabled looks the same as normal
    if ( state == IndicatorState_Disabled )
        state = IndicatorState_Normal;

    return m_bitmapsCheckbox[state][status];
}

wxBitmap wxGTKRenderer::GetRadioBitmap(int flags)
{
    IndicatorState state;
    IndicatorStatus status;
    GetIndicatorsFromFlags(flags, state, status);

    wxBitmap& bmp = m_bitmapsRadiobtn[state][status];
    if ( !bmp.Ok() )
    {
        const wxSize size = GetRadioBitmapSize();

        wxMemoryDC dc;
        bmp.Create(size.x, size.y);
        dc.SelectObject(bmp);

        DrawRadioBitmap(dc, size, flags);
    }

    return bmp;
}

wxBitmap wxGTKRenderer::GetLineWrapBitmap() const
{
    if ( !m_bmpLineWrap.Ok() )
    {
        // the line wrap bitmap as used by GTK+
        #define line_wrap_width 6
        #define line_wrap_height 9
        static const char line_wrap_bits[] =
        {
          0x1e, 0x3e, 0x30, 0x30, 0x39, 0x1f, 0x0f, 0x0f, 0x1f,
        };

        wxBitmap bmpLineWrap(line_wrap_bits, line_wrap_width, line_wrap_height);
        if ( !bmpLineWrap.Ok() )
        {
            wxFAIL_MSG( _T("Failed to create line wrap XBM") );
        }
        else
        {
            wxConstCast(this, wxGTKRenderer)->m_bmpLineWrap = bmpLineWrap;
        }
    }

    return m_bmpLineWrap;
}

#if wxUSE_TOOLBAR
void wxGTKRenderer::DrawToolBarButton(wxDC& dc,
                                      const wxString& label,
                                      const wxBitmap& bitmap,
                                      const wxRect& rectOrig,
                                      int flags,
                                      long WXUNUSED(style),
                                      int tbarStyle)
{
    // we don't draw the separators at all
    if ( !label.empty() || bitmap.Ok() )
    {
        wxRect rect = rectOrig;
        rect.Deflate(BORDER_THICKNESS);

        if ( flags & wxCONTROL_PRESSED )
        {
            DrawBorder(dc, wxBORDER_SUNKEN, rect, flags, &rect);

            DrawBackground(dc, wxSCHEME_COLOUR(m_scheme, CONTROL_PRESSED), rect);
        }
        else if ( flags & wxCONTROL_CURRENT )
        {
            DrawBorder(dc, wxBORDER_RAISED, rect, flags, &rect);

            DrawBackground(dc, wxSCHEME_COLOUR(m_scheme, CONTROL_CURRENT), rect);
        }

        if(tbarStyle & wxTB_TEXT)
        {
            if(tbarStyle & wxTB_HORIZONTAL)
            {
                dc.DrawLabel(label, bitmap, rect, wxALIGN_CENTRE);
            }
            else
            {
                dc.DrawLabel(label, bitmap, rect, wxALIGN_LEFT|wxALIGN_CENTER_VERTICAL);
            }
        }
        else
        {
            int xpoint = (rect.GetLeft() + rect.GetRight() + 1 - bitmap.GetWidth()) / 2;
            int ypoint = (rect.GetTop() + rect.GetBottom() + 1 - bitmap.GetHeight()) / 2;
            dc.DrawBitmap(bitmap, xpoint, ypoint);
        }
    }
}
#endif // wxUSE_TOOLBAR

// ----------------------------------------------------------------------------
// text control
// ----------------------------------------------------------------------------

#if wxUSE_TEXTCTRL

wxRect wxGTKRenderer::GetTextClientArea(const wxTextCtrl *text,
                                        const wxRect& rect,
                                        wxCoord *extraSpaceBeyond) const
{
    wxRect
      rectText = wxStdRenderer::GetTextClientArea(text, rect, extraSpaceBeyond);

    if ( text->WrapLines() )
    {
        // leave enough for the line wrap bitmap indicator
        wxCoord widthMark = GetLineWrapBitmap().GetWidth() + 2;

        rectText.width -= widthMark;

        if ( extraSpaceBeyond )
            *extraSpaceBeyond = widthMark;
    }

    return rectText;
}

void wxGTKRenderer::DrawLineWrapMark(wxDC& dc, const wxRect& rect)
{
    wxBitmap bmpLineWrap = GetLineWrapBitmap();