C++ CellParser::GetDC方法代码示例

void FracCell::RecalculateWidths(int fontsize)
{
  CellParser *parser = CellParser::Get();
  double scale = parser->GetScale();
  if (m_isBroken || m_exponent)
  {
    m_num->RecalculateWidthsList(fontsize);
    m_denom->RecalculateWidthsList(fontsize);
  }
  else
  {
    m_num->RecalculateWidthsList(MAX(MC_MIN_SIZE, fontsize - FRAC_DEC));
    m_denom->RecalculateWidthsList(MAX(MC_MIN_SIZE, fontsize - FRAC_DEC));
  }
  if (m_exponent && !m_isBroken)
  {
    wxDC& dc = parser->GetDC();

    int height;
    int fontsize1 = (int) ((double)(fontsize) * scale + 0.5);
    dc.SetFont(wxFont(fontsize1, wxFONTFAMILY_MODERN,
    		wxFONTSTYLE_NORMAL, wxFONTWEIGHT_NORMAL, false,
    		parser->GetFontName(TS_VARIABLE)));
    dc.GetTextExtent(wxT("/"), &m_expDivideWidth, &height);
    m_width = m_num->GetFullWidth(scale) + m_denom->GetFullWidth(scale) + m_expDivideWidth;
  }
  else
  {
    wxDC& dc = parser->GetDC();

    // We want half a space's widh of blank space to separate us from the
    // next minus.
    int dummy = 0;
    int fontsize1 = (int) ((double)(fontsize) * scale + 0.5);
    dc.SetFont(wxFont(fontsize1, wxFONTFAMILY_MODERN,
                      wxFONTSTYLE_NORMAL, wxFONTWEIGHT_NORMAL, false,
                      parser->GetFontName(TS_VARIABLE)));
    dc.GetTextExtent(wxT("X"), &m_horizontalGap, &dummy);
    m_horizontalGap /= 2;

    m_width = MAX(m_num->GetFullWidth(scale), m_denom->GetFullWidth(scale)) + 2 * m_horizontalGap;
  }
  m_open1->RecalculateWidths(fontsize);
  m_close1->RecalculateWidths(fontsize);
  m_open2->RecalculateWidths(fontsize);
  m_close2->RecalculateWidths(fontsize);
  m_divide->RecalculateWidths(fontsize);
  ResetData();
}

void ParenCell::RecalculateSize(CellParser& parser, int fontsize, bool all)
{
    double scale = parser.GetScale();
    m_innerCell->RecalculateSize(parser, fontsize, true);
    m_height = m_innerCell->GetMaxHeight() + SCALE_PX(2, scale);
    m_center = m_innerCell->GetMaxCenter() + SCALE_PX(1, scale);

#if defined __WXMSW__
    if (!parser.CheckTeXFonts())
    {
        wxDC& dc = parser.GetDC();
        int fontsize1 = (int) ((fontsize * scale + 0.5));
        dc.SetFont(wxFont(fontsize1, wxFONTFAMILY_MODERN,
                          false,
                          false,
                          false,
                          parser.GetFontName()));
        dc.GetTextExtent(wxT("("), &m_charWidth1, &m_charHeight1);
    }
#endif

    m_open->RecalculateSize(parser, fontsize, false);
    m_close->RecalculateSize(parser, fontsize, false);
    MathCell::RecalculateSize(parser, fontsize, all);
}

void FracCell::RecalculateWidths(CellParser& parser, int fontsize, bool all)
{
  double scale = parser.GetScale();
  if (m_isBroken || m_exponent)
  {
    m_num->RecalculateWidths(parser, fontsize, true);
    m_denom->RecalculateWidths(parser, fontsize, true);
  }
  else
  {
    m_num->RecalculateWidths(parser, MAX(MC_MIN_SIZE, fontsize - FRAC_DEC), true);
    m_denom->RecalculateWidths(parser, MAX(MC_MIN_SIZE, fontsize - FRAC_DEC), true);
  }
  if (m_exponent && !m_isBroken)
  {
    wxDC& dc = parser.GetDC();
    int height;
    int fontsize1 = (int) ((double)(fontsize) * scale + 0.5);
    dc.SetFont(wxFont(fontsize1, wxFONTFAMILY_MODERN,
                            false, false, false,
                            parser.GetFontName(TS_VARIABLE)));
    dc.GetTextExtent(wxT("/"), &m_expDivideWidth, &height);
    m_width = m_num->GetFullWidth(scale) + m_denom->GetFullWidth(scale) + m_expDivideWidth;
  }
  else
  {
    m_width = MAX(m_num->GetFullWidth(scale), m_denom->GetFullWidth(scale));
  }
  m_open1->RecalculateWidths(parser, fontsize, false);
  m_close1->RecalculateWidths(parser, fontsize, false);
  m_open2->RecalculateWidths(parser, fontsize, false);
  m_close2->RecalculateWidths(parser, fontsize, false);
  m_divide->RecalculateWidths(parser, fontsize, false);
  MathCell::RecalculateWidths(parser, fontsize, all);
}

void SlideShow::Draw(CellParser& parser, wxPoint point, int fontsize, bool all)
{
  if (DrawThisCell(parser, point) && m_bitmaps[m_displayed] != NULL)
  {
    wxDC& dc = parser.GetDC();
    wxMemoryDC bitmapDC;
    double scale = parser.GetScale();
    scale = MAX(scale, 1.0);

    dc.DrawRectangle(wxRect(point.x, point.y - m_center, m_width, m_height));

    if (scale != 1.0)
    {
      wxImage img = m_bitmaps[m_displayed]->ConvertToImage();
      img.Rescale(m_width, m_height);

      wxBitmap bmp = img;
      bitmapDC.SelectObject(bmp);
    }
    else
      bitmapDC.SelectObject(*m_bitmaps[m_displayed]);

    dc.Blit(point.x + 1, point.y - m_center + 1, m_width, m_height, &bitmapDC, 0, 0);
  }
  MathCell::Draw(parser, point, fontsize, all);
}

void ImgCell::Draw(CellParser& parser, wxPoint point, int fontsize)
{
  wxDC& dc = parser.GetDC();

  if (DrawThisCell(parser, point) && m_image != NULL)
  {
    wxMemoryDC bitmapDC;
    double scale = parser.GetScale();
    m_image->ViewportSize(m_canvasSize.x,m_canvasSize.y,scale);
  
    m_height = (m_image->m_height) + 2 * m_imageBorderWidth;
    m_width  = (m_image->m_width)  + 2 * m_imageBorderWidth;

    SetPen(parser);
    if (m_drawRectangle)
      
      dc.DrawRectangle(wxRect(point.x, point.y - m_center, m_width, m_height));  

    wxBitmap bitmap = m_image->GetBitmap();
    bitmapDC.SelectObject(bitmap);
      
    dc.Blit(point.x + m_imageBorderWidth, point.y - m_center + m_imageBorderWidth, m_width - 2 * m_imageBorderWidth, m_height - 2 * m_imageBorderWidth, &bitmapDC, 0, 0);
  }
  else
    // The cell isn't drawn => No need to keep it's image cache for now.
    ClearCache();

  MathCell::Draw(parser, point, fontsize);
}

/***
 * Reset the pen in the device context.
 */
void MathCell::UnsetPen(CellParser& parser)
{
  wxDC& dc = parser.GetDC();
  if (m_type == MC_TYPE_PROMPT || m_type == MC_TYPE_INPUT || m_highlight)
    dc.SetPen(*(wxThePenList->FindOrCreatePen(parser.GetColor(TS_DEFAULT),
                1, wxPENSTYLE_SOLID)));
}

void MathCell::SetForeground(CellParser& parser)
{
  wxColour color;
  wxDC& dc = parser.GetDC();
  if (m_highlight)
  {
    color = parser.GetColor(TS_HIGHLIGHT);
  }
  else {
    switch (m_type)
    {
    case MC_TYPE_PROMPT:
      color = parser.GetColor(TS_OTHER_PROMPT);
      break;
    case MC_TYPE_MAIN_PROMPT:
      color = parser.GetColor(TS_MAIN_PROMPT);
      break;
    case MC_TYPE_ERROR:
      color = wxColour(wxT("red"));
      break;
    case MC_TYPE_LABEL:
      color = parser.GetColor(TS_LABEL);
      break;
    default:
      color = parser.GetColor(m_textStyle);
      break;
    }
  }

  dc.SetTextForeground(color);
}

void SqrtCell::RecalculateWidths(int fontsize)
{
  CellParser *parser = CellParser::Get();
  double scale = parser->GetScale();
  m_innerCell->RecalculateWidthsList(fontsize);
  if (parser->CheckTeXFonts())
  {
    wxDC& dc = parser->GetDC();
    double scale = parser->GetScale();
    m_innerCell->RecalculateSizeList(fontsize);

    m_signFontScale = 1.0;
    int fontsize1 = (int)(SIGN_FONT_SCALE*scale*fontsize*m_signFontScale + 0.5);

    dc.SetFont(wxFont(fontsize1, wxFONTFAMILY_MODERN, wxFONTSTYLE_NORMAL, wxFONTWEIGHT_NORMAL, false, parser->GetTeXCMEX()));
    dc.GetTextExtent(wxT("s"), &m_signWidth, &m_signSize);
    m_signTop = m_signSize / 5;
    m_width = m_innerCell->GetFullWidth(scale) + m_signWidth;

    int size = m_innerCell->GetMaxHeight();

    if  (size <= (m_signSize) / 5)  {
      m_signType = 1;
      m_signFontScale = (5.0 * size) / (1.5 * m_signSize);
    }
    else if (size <= (2*m_signSize) / 5) {
      m_signType = 2;
      m_signFontScale = (5.0 * size) / (2.2 * m_signSize);
    }
    else if (size <= (3*m_signSize) / 5) {
      m_signType = 3;
      m_signFontScale = (5.0 * size) / (3.0 * m_signSize);
    }
    else if (size <= (4*m_signSize) / 5 ) {
      m_signType = 4;
      m_signFontScale = (5.0 * size) / (3.8 * m_signSize);
    }
    else {
      m_signType = 5;
      m_signFontScale = 1.0;
    }

    fontsize1 = (int)(SIGN_FONT_SCALE*scale*fontsize*m_signFontScale + 0.5);
    dc.SetFont(wxFont(fontsize1, wxFONTFAMILY_MODERN, wxFONTSTYLE_NORMAL, wxFONTWEIGHT_NORMAL, false, parser->GetTeXCMEX()));
    dc.GetTextExtent(wxT("s"), &m_signWidth, &m_signSize);
    m_signTop = m_signSize / 5;
    m_width = m_innerCell->GetFullWidth(scale) + m_signWidth;
  }
  else
    m_width = m_innerCell->GetFullWidth(scale) + SCALE_PX(10, scale) +
              3 * SCALE_PX(1, scale) + 1;
  m_open->RecalculateWidthsList(fontsize);
  m_close->RecalculateWidthsList(fontsize);
  ResetData();
}

void SqrtCell::RecalculateWidths(CellParser& parser, int fontsize, bool all)
{
  double scale = parser.GetScale();
  m_innerCell->RecalculateWidths(parser, fontsize, true);
  if (parser.CheckTeXFonts())
  {
    wxDC& dc = parser.GetDC();
    double scale = parser.GetScale();
    m_innerCell->RecalculateSize(parser, fontsize, true);

    m_signFontScale = 1.0;
    int fontsize1 = (int)(SIGN_FONT_SCALE*scale*fontsize*m_signFontScale + 0.5);

    dc.SetFont(wxFont(fontsize1, wxMODERN, false, false, false, parser.GetTeXCMEX()));
    dc.GetTextExtent(wxT("s"), &m_signWidth, &m_signSize);
    m_signTop = m_signSize / 5;
    m_width = m_innerCell->GetFullWidth(scale) + m_signWidth;

    int size = m_innerCell->GetMaxHeight();

    if  (size <= (m_signSize) / 5)  {
      m_signType = 1;
      m_signFontScale = (5.0 * size) / (1.5 * m_signSize);
    }
    else if (size <= (2*m_signSize) / 5) {
      m_signType = 2;
      m_signFontScale = (5.0 * size) / (2.2 * m_signSize);
    }
    else if (size <= (3*m_signSize) / 5) {
      m_signType = 3;
      m_signFontScale = (5.0 * size) / (3.0 * m_signSize);
    }
    else if (size <= (4*m_signSize) / 5 ) {
      m_signType = 4;
      m_signFontScale = (5.0 * size) / (3.8 * m_signSize);
    }
    else {
      m_signType = 5;
      m_signFontScale = 1.0;
    }

    fontsize1 = (int)(SIGN_FONT_SCALE*scale*fontsize*m_signFontScale + 0.5);
    dc.SetFont(wxFont(fontsize1, wxMODERN, false, false, false, parser.GetTeXCMEX()));
    dc.GetTextExtent(wxT("s"), &m_signWidth, &m_signSize);
    m_signTop = m_signSize / 5;
    m_width = m_innerCell->GetFullWidth(scale) + m_signWidth;
  }
  else
    m_width = m_innerCell->GetFullWidth(scale) + SCALE_PX(10, scale) +
              3 * SCALE_PX(1, scale) + 1;
  m_open->RecalculateWidths(parser, fontsize, all);
  m_close->RecalculateWidths(parser, fontsize, all);
  MathCell::RecalculateWidths(parser, fontsize, all);
}

void FracCell::Draw(wxPoint point, int fontsize)
{
  MathCell::Draw(point, fontsize);
  CellParser *parser = CellParser::Get();

  if (DrawThisCell(point) && InUpdateRegion())
  {
    wxDC& dc = parser->GetDC();
    double scale = parser->GetScale();
    wxPoint num, denom;

    if (m_exponent && !m_isBroken)
    {
      double scale = parser->GetScale();
      
      num.x = point.x;
      num.y = point.y;
      denom.x = point.x + m_num->GetFullWidth(scale) + m_expDivideWidth;
      denom.y = num.y;

      m_num->DrawList(num, fontsize);
      m_denom->DrawList(denom, fontsize);

      int fontsize1 = (int) ((double)(fontsize) * scale + 0.5);
      dc.SetFont(wxFont(fontsize1, wxFONTFAMILY_MODERN,
    		  wxFONTSTYLE_NORMAL, wxFONTWEIGHT_NORMAL, false,
    		  parser->GetFontName(TS_VARIABLE)));
      dc.DrawText(wxT("/"),
                  point.x + m_num->GetFullWidth(scale),
                  point.y - m_num->GetMaxCenter() + SCALE_PX(MC_TEXT_PADDING, scale));
    }
    else
    {      
      num.x = point.x + (m_width - m_num->GetFullWidth(scale)) / 2;
      num.y = point.y - m_num->GetMaxHeight() + m_num->GetMaxCenter() -
              SCALE_PX(2, scale);
      m_num->DrawList(num, MAX(MC_MIN_SIZE, fontsize - FRAC_DEC));

      denom.x = point.x + (m_width - m_denom->GetFullWidth(scale)) / 2;
      denom.y = point.y + m_denom->GetMaxCenter() + SCALE_PX(2, scale);
      m_denom->DrawList(denom, MAX(MC_MIN_SIZE, fontsize - FRAC_DEC));
      SetPen();
      if (m_fracStyle != FC_CHOOSE)
        dc.DrawLine(point.x + m_horizontalGap, point.y, point.x + m_width - m_horizontalGap, point.y);
      UnsetPen();
    }
  }
}

void FracCell::Draw(CellParser& parser, wxPoint point, int fontsize, bool all)
{
  if (DrawThisCell(parser, point))
  {
    wxDC& dc = parser.GetDC();
    double scale = parser.GetScale();
    wxPoint num, denom;

    if (m_exponent && !m_isBroken)
    {
      double scale = parser.GetScale();

      num.x = point.x;
      num.y = point.y;
      denom.x = point.x + m_num->GetFullWidth(scale) + m_expDivideWidth;
      denom.y = num.y;

      m_num->Draw(parser, num, fontsize, true);
      m_denom->Draw(parser, denom, fontsize, true);

      int fontsize1 = (int) ((double)(fontsize) * scale + 0.5);
      dc.SetFont(wxFont(fontsize1, wxFONTFAMILY_MODERN,
                              false, false, false,
                              parser.GetFontName(TS_VARIABLE)));
      dc.DrawText(wxT("/"),
                  point.x + m_num->GetFullWidth(scale),
                  point.y - m_num->GetMaxCenter() + SCALE_PX(MC_TEXT_PADDING, scale));
    }
    else
    {
      num.x = point.x + (m_width - m_num->GetFullWidth(scale)) / 2;
      num.y = point.y - m_num->GetMaxHeight() + m_num->GetMaxCenter() -
              SCALE_PX(2, scale);
      m_num->Draw(parser, num, MAX(MC_MIN_SIZE, fontsize - FRAC_DEC), true);

      denom.x = point.x + (m_width - m_denom->GetFullWidth(scale)) / 2;
      denom.y = point.y + m_denom->GetMaxCenter() + SCALE_PX(2, scale);
      m_denom->Draw(parser, denom, MAX(MC_MIN_SIZE, fontsize - FRAC_DEC), true);
      SetPen(parser);
      if (m_fracStyle != FC_CHOOSE)
        dc.DrawLine(point.x, point.y, point.x + m_width, point.y);
      UnsetPen(parser);
    }
  }

  MathCell::Draw(parser, point, fontsize, all);
}

void SlideShow::Draw(wxPoint point, int fontsize)
{
  MathCell::Draw(point, fontsize);

  // TODO: Enable this when unselecting text updates the right region.
  //if (!InUpdateRegion()) return;
  
  CellParser *parser = CellParser::Get();
  wxDC& dc = parser->GetDC();

  if (DrawThisCell(point) && (m_images[m_displayed] != NULL))
  {
    wxMemoryDC bitmapDC;
    double scale = parser->GetScale();
    m_images[m_displayed]->ViewportSize(m_canvasSize.x,m_canvasSize.y,scale);
  
    m_height = (m_images[m_displayed]->m_height) + 2 * m_imageBorderWidth;
    m_width  = (m_images[m_displayed]->m_width)  + 2 * m_imageBorderWidth;
    m_center = m_height / 2;

    // Slide show cells have a red border except if they are selected
    if(m_drawBoundingBox)
      dc.SetBrush( *(wxTheBrushList->FindOrCreateBrush(parser->GetColor(TS_SELECTION))));
    else
      dc.SetPen(*wxRED_PEN);

    // If we need a selection border on another redraw we will be informed by OnPaint() again.
    m_drawBoundingBox = false;

    dc.DrawRectangle(wxRect(point.x, point.y - m_center, m_width, m_height));  

    wxBitmap bitmap = m_images[m_displayed]->GetBitmap();
    bitmapDC.SelectObject(bitmap);
      
    dc.Blit(point.x + m_imageBorderWidth, point.y - m_center + m_imageBorderWidth, m_width - 2 * m_imageBorderWidth, m_height - 2 * m_imageBorderWidth, &bitmapDC, 0, 0);
  }
  else
    // The cell isn't drawn => No need to keep it's image cache for now.
    ClearCache();
}

void ConjugateCell::Draw(CellParser& parser, wxPoint point, int fontsize)
{
  double scale = parser.GetScale();
  wxDC& dc = parser.GetDC();
  if (DrawThisCell(parser, point))
  {
    SetPen(parser);
    wxPoint in;
    in.x = point.x + SCALE_PX(4, scale);
    in.y = point.y;
    m_innerCell->DrawList(parser, in, fontsize);

    dc.DrawLine(point.x + SCALE_PX(2, scale),
                point.y - m_center + SCALE_PX(2, scale),
                point.x + m_width - SCALE_PX(2, scale) - 1,
                point.y - m_center + SCALE_PX(2, scale)
		);
		//                point.y - m_center + m_height - SCALE_PX(2, scale));
    UnsetPen(parser);
  }
  MathCell::Draw(parser, point, fontsize);
}

void ImgCell::Draw(wxPoint point, int fontsize)
{
  MathCell::Draw(point, fontsize);

  // TODO: Enable this when unselecting text updates the right region.
  //if (!InUpdateRegion()) return;

  CellParser *parser = CellParser::Get();
  wxDC& dc = parser->GetDC();
  if (DrawThisCell(point) && (m_image != NULL))
  {
    wxMemoryDC bitmapDC;

    if(m_drawBoundingBox)
      dc.SetBrush( *(wxTheBrushList->FindOrCreateBrush(parser->GetColor(TS_SELECTION))));
    else
      SetPen();
    
    if (m_drawRectangle || m_drawBoundingBox)
      dc.DrawRectangle(wxRect(point.x, point.y - m_center, m_width, m_height));
    
    wxBitmap bitmap = m_image->GetBitmap();
    bitmapDC.SelectObject(bitmap);

    if ((m_drawBoundingBox == false) || (m_imageBorderWidth > 0))
      dc.Blit(point.x + m_imageBorderWidth, point.y - m_center + m_imageBorderWidth, m_width - 2 * m_imageBorderWidth, m_height - 2 * m_imageBorderWidth, &bitmapDC, 0, 0);
    else
      dc.StretchBlit(point.x + 5, point.y - m_center + 5, m_width - 2 * 5, m_height - 2 * 5, &bitmapDC, 0, 0, m_width, m_height);
  }
  else
    // The cell isn't drawn => No need to keep it's image cache for now.
    ClearCache();
  
  // The next time we need to draw a bounding box we will be informed again.
  m_drawBoundingBox = false;
}

void SqrtCell::Draw(CellParser& parser, wxPoint point, int fontsize, bool all)
{
  if (DrawThisCell(parser, point))
  {
    wxDC& dc = parser.GetDC();
    double scale = parser.GetScale();

    wxPoint in(point);

    if (parser.CheckTeXFonts())
    {
      SetPen(parser);

      in.x += m_signWidth;
      double scale = parser.GetScale();

      int fontsize1 = (int)(SIGN_FONT_SCALE*scale*fontsize*m_signFontScale + 0.5);

      dc.SetFont(wxFont(fontsize1, wxMODERN, false, false, false, parser.GetTeXCMEX()));
      SetForeground(parser);
      if (m_signType < 4) {
        dc.DrawText(
            m_signType == 1 ? wxT("p") :
              m_signType == 2 ? wxT("q") :
                m_signType == 3 ? wxT("r") : wxT("s"),
          point.x,
          point.y - m_innerCell->GetMaxCenter() - m_signTop);
      }
      else {
        int yBottom = point.y + m_innerCell->GetMaxDrop() - 3.2*m_signTop;
        int yTop = point.y - m_innerCell->GetMaxCenter() - m_signTop;
        int dy = m_signSize / 10;
        dc.DrawText(wxT("t"),
            point.x,
            yBottom);
        dc.DrawText(wxT("v"),
            point.x,
            yTop);
        while (yTop < yBottom) {
          yTop += dy;
          dc.DrawText(wxT("u"),
                      point.x,
                      yTop);
        }
      }

      dc.DrawLine(point.x + m_signWidth,
                  point.y - m_innerCell->GetMaxCenter(),
                  point.x + m_signWidth + m_innerCell->GetFullWidth(scale),
                  point.y - m_innerCell->GetMaxCenter());

      UnsetPen(parser);
    }
    else
    {
      in.x += SCALE_PX(10, scale) + SCALE_PX(1, scale) + 1;

      SetPen(parser);
      dc.DrawLine(point.x,
                  point.y,
                  point.x + SCALE_PX(3, scale),
                  point.y - SCALE_PX(1, scale));
      dc.DrawLine(point.x + SCALE_PX(3, scale),
                  point.y - SCALE_PX(1, scale),
                  point.x + SCALE_PX(7, scale),
                  point.y + m_height - m_center - SCALE_PX(4, scale));
      dc.DrawLine(point.x + SCALE_PX(3, scale) + 1,
                  point.y - SCALE_PX(1, scale),
                  point.x + SCALE_PX(7, scale) + 1,
                  point.y + m_height - m_center - SCALE_PX(4, scale));
      dc.DrawLine(point.x + SCALE_PX(7, scale) + 1,
                  point.y + m_height - m_center - SCALE_PX(4, scale),
                  point.x + SCALE_PX(10, scale),
                  point.y - m_center + SCALE_PX(2, scale));
      dc.DrawLine(point.x + SCALE_PX(10, scale),
                  point.y - m_center + SCALE_PX(2, scale),
                  point.x + m_width - SCALE_PX(1, scale),
                  point.y - m_center + SCALE_PX(2, scale));
      dc.DrawLine(point.x + m_width - SCALE_PX(1, scale),
                  point.y - m_center + SCALE_PX(2, scale),
                  point.x + m_width - SCALE_PX(1, scale),
                  point.y - m_center + SCALE_PX(6, scale));
      UnsetPen(parser);
    }

    m_innerCell->Draw(parser, in, fontsize, true);
  }
  MathCell::Draw(parser, point, fontsize, all);
}