divided.cpp

wxGTK 是 wxWidgets 的 linux GTK+ (>2.2.3)版本。wxWidgets 是一个跨平台的 GUI 框架

    {
      wxDividedShapeControlPoint *controlPoint =
        new wxDividedShapeControlPoint(m_canvas, this, i, CONTROL_POINT_SIZE, 0.0, (double)(actualY - GetY()), 0);
      m_canvas->AddShape(controlPoint);
      m_controlPoints.Append(controlPoint);
    }
    currentY = actualY;
    i ++;
    node = node->GetNext();
  }
}

void wxDividedShape::ResetControlPoints()
{
  // May only have the region handles, (n - 1) of them.
  if (m_controlPoints.GetCount() > (GetRegions().GetCount() - 1))
    wxRectangleShape::ResetControlPoints();

  ResetMandatoryControlPoints();
}

void wxDividedShape::ResetMandatoryControlPoints()
{
  double currentY = (double)(GetY() - (m_height / 2.0));
  double maxY = (double)(GetY() + (m_height / 2.0));

  wxObjectList::compatibility_iterator node = m_controlPoints.GetFirst();
  int i = 0;
  while (node)
  {
    wxControlPoint *controlPoint = (wxControlPoint *)node->GetData();
    if (controlPoint->IsKindOf(CLASSINFO(wxDividedShapeControlPoint)))
    {
      wxObjectList::compatibility_iterator node1 = GetRegions().Item(i);
      wxShapeRegion *region = (wxShapeRegion *)node1->GetData();

      double proportion = region->m_regionProportionY;

      double y = currentY + m_height*proportion;
      double actualY = (double)(maxY < y ? maxY : y);

      controlPoint->m_xoffset = 0.0;
      controlPoint->m_yoffset = (double)(actualY - GetY());
      currentY = actualY;
      i ++;
    }
    node = node->GetNext();
  }
}

#if wxUSE_PROLOGIO
void wxDividedShape::WriteAttributes(wxExpr *clause)
{
  wxRectangleShape::WriteAttributes(clause);
}

void wxDividedShape::ReadAttributes(wxExpr *clause)
{
  wxRectangleShape::ReadAttributes(clause);
}
#endif

/*
 * Edit the division colour/style
 *
 */

void wxDividedShape::EditRegions()
{
  wxMessageBox(wxT("EditRegions() is unimplemented."), wxT("OGL"), wxOK);

  // TODO
#if 0
  if (GetRegions().GetCount() < 2)
    return;

  wxBeginBusyCursor();

  GraphicsForm *form = new GraphicsForm("Divided nodes");
  // Need an array to store all the style strings,
  // since they need to be converted to integers
  char **styleStrings = new char *[GetRegions().GetCount()];
  for (int j = 0; j < GetRegions().GetCount(); j++)
    styleStrings[j] = NULL;

  int i = 0;
  wxNode *node = GetRegions().GetFirst();
  while (node && node->GetNext())
  {
    wxShapeRegion *region = (wxShapeRegion *)node->GetData();
    char buf[50];
    sprintf(buf, "Region %d", (i+1));
    form->Add(wxMakeFormMessage(buf));
    form->Add(wxMakeFormNewLine());

    form->Add(wxMakeFormString("Colour", &region->penColour, wxFORM_CHOICE,
              new wxList(wxMakeConstraintStrings(
    "Invisible"        ,
    "BLACK"            ,
    "BLUE"             ,
    "BROWN"            ,
    "CORAL"            ,
    "CYAN"             ,
    "DARK GREY"        ,
    "DARK GREEN"       ,
    "DIM GREY"         ,
    "GREY"             ,
    "GREEN"            ,
    "LIGHT BLUE"       ,
    "LIGHT GREY"       ,
    "MAGENTA"          ,
    "MAROON"           ,
    "NAVY"             ,
    "ORANGE"           ,
    "PURPLE"           ,
    "RED"              ,
    "TURQUOISE"        ,
    "VIOLET"           ,
    "WHITE"            ,
    "YELLOW"           ,
    NULL),
    NULL), NULL, wxVERTICAL, 150));

    char *styleString = NULL;
    switch (region->penStyle)
    {
      case wxSHORT_DASH:
        styleString = "Short Dash";
        break;
      case wxLONG_DASH:
        styleString = "Long Dash";
        break;
      case wxDOT:
        styleString = "Dot";
        break;
      case wxDOT_DASH:
        styleString = "Dot Dash";
        break;
      case wxSOLID:
      default:
        styleString = "Solid";
        break;
    }
    styleStrings[i] = copystring(styleString);
    form->Add(wxMakeFormString("Style", &(styleStrings[i]), wxFORM_CHOICE,
              new wxList(wxMakeConstraintStrings(
    "Solid"            ,
    "Short Dash"       ,
    "Long Dash"        ,
    "Dot"              ,
    "Dot Dash"         ,
    NULL),
    NULL), NULL, wxVERTICAL, 100));
    node = node->GetNext();
    i ++;
    if (node && node->GetNext())
      form->Add(wxMakeFormNewLine());
  }
  wxDialogBox *dialog = new wxDialogBox(m_canvas->GetParent(), "Divided object properties", 10, 10, 500, 500);
  if (GraphicsLabelFont)
    dialog->SetLabelFont(GraphicsLabelFont);
  if (GraphicsButtonFont)
    dialog->SetButtonFont(GraphicsButtonFont);
  form->AssociatePanel(dialog);
  form->dialog = dialog;

  dialog->Fit();
  dialog->Centre(wxBOTH);

  wxEndBusyCursor();

  dialog->Show(true);

  node = GetRegions().GetFirst();
  i = 0;
  while (node)
  {
    wxShapeRegion *region = (wxShapeRegion *)node->GetData();

    if (styleStrings[i])
    {
      if (strcmp(styleStrings[i], "Solid") == 0)
        region->penStyle = wxSOLID;
      else if (strcmp(styleStrings[i], "Dot") == 0)
        region->penStyle = wxDOT;
      else if (strcmp(styleStrings[i], "Short Dash") == 0)
        region->penStyle = wxSHORT_DASH;
      else if (strcmp(styleStrings[i], "Long Dash") == 0)
        region->penStyle = wxLONG_DASH;
      else if (strcmp(styleStrings[i], "Dot Dash") == 0)
        region->penStyle = wxDOT_DASH;
      delete[] styleStrings[i];
    }
    region->m_actualPenObject = NULL;
    node = node->GetNext();
    i ++;
  }
  delete[] styleStrings;
  Draw(dc);
#endif
}

void wxDividedShape::OnRightClick(double x, double y, int keys, int attachment)
{
  if (keys & KEY_CTRL)
  {
    EditRegions();
  }
  else
  {
    wxRectangleShape::OnRightClick(x, y, keys, attachment);
  }
}

wxDividedShapeControlPoint::wxDividedShapeControlPoint(wxShapeCanvas *the_canvas, wxShape *object,
  int region, double size, double the_m_xoffset, double the_m_yoffset, int the_type):
    wxControlPoint(the_canvas, object, size, the_m_xoffset, the_m_yoffset, the_type)
{
  regionId = region;
}

wxDividedShapeControlPoint::~wxDividedShapeControlPoint()
{
}

// Implement resizing of divided object division
void wxDividedShapeControlPoint::OnDragLeft(bool WXUNUSED(draw), double WXUNUSED(x), double y, int WXUNUSED(keys), int WXUNUSED(attachment))
{
    wxClientDC dc(GetCanvas());
    GetCanvas()->PrepareDC(dc);

    dc.SetLogicalFunction(OGLRBLF);
    wxPen dottedPen(*wxBLACK, 1, wxDOT);
    dc.SetPen(dottedPen);
    dc.SetBrush((* wxTRANSPARENT_BRUSH));

    wxDividedShape *dividedObject = (wxDividedShape *)m_shape;
    double x1 = (double)(dividedObject->GetX() - (dividedObject->GetWidth()/2.0));
    double y1 = y;
    double x2 = (double)(dividedObject->GetX() + (dividedObject->GetWidth()/2.0));
    double y2 = y;
    dc.DrawLine(WXROUND(x1), WXROUND(y1), WXROUND(x2), WXROUND(y2));
}

void wxDividedShapeControlPoint::OnBeginDragLeft(double WXUNUSED(x), double y, int WXUNUSED(keys), int WXUNUSED(attachment))
{
    wxClientDC dc(GetCanvas());
    GetCanvas()->PrepareDC(dc);

    wxDividedShape *dividedObject = (wxDividedShape *)m_shape;
    dc.SetLogicalFunction(OGLRBLF);
    wxPen dottedPen(*wxBLACK, 1, wxDOT);
    dc.SetPen(dottedPen);
    dc.SetBrush((* wxTRANSPARENT_BRUSH));

    double x1 = (double)(dividedObject->GetX() - (dividedObject->GetWidth()/2.0));
    double y1 = y;
    double x2 = (double)(dividedObject->GetX() + (dividedObject->GetWidth()/2.0));
    double y2 = y;
    dc.DrawLine(WXROUND(x1), WXROUND(y1), WXROUND(x2), WXROUND(y2));
    m_canvas->CaptureMouse();
}

void wxDividedShapeControlPoint::OnEndDragLeft(double WXUNUSED(x), double y, int WXUNUSED(keys), int WXUNUSED(attachment))
{
    wxClientDC dc(GetCanvas());
    GetCanvas()->PrepareDC(dc);

    wxDividedShape *dividedObject = (wxDividedShape *)m_shape;
    wxObjectList::compatibility_iterator node = dividedObject->GetRegions().Item(regionId);
    if (!node)
    return;

    wxShapeRegion *thisRegion = (wxShapeRegion *)node->GetData();
    wxShapeRegion *nextRegion = NULL; // Region below this one

    dc.SetLogicalFunction(wxCOPY);

    m_canvas->ReleaseMouse();

    // Find the old top and bottom of this region,
    // and calculate the new proportion for this region
    // if legal.

    double currentY = (double)(dividedObject->GetY() - (dividedObject->GetHeight() / 2.0));
    double maxY = (double)(dividedObject->GetY() + (dividedObject->GetHeight() / 2.0));

    // Save values
    double thisRegionTop = 0.0;
    double nextRegionBottom = 0.0;

    node = dividedObject->GetRegions().GetFirst();
    while (node)
    {
      wxShapeRegion *region = (wxShapeRegion *)node->GetData();

      double proportion = region->m_regionProportionY;
      double yy = currentY + (dividedObject->GetHeight()*proportion);
      double actualY = (double)(maxY < yy ? maxY : yy);

      if (region == thisRegion)
      {
        thisRegionTop = currentY;
        if (node->GetNext())
          nextRegion = (wxShapeRegion *)node->GetNext()->GetData();
      }
      if (region == nextRegion)
      {
        nextRegionBottom = actualY;
      }

      currentY = actualY;
      node = node->GetNext();
    }
    if (!nextRegion)
      return;

    // Check that we haven't gone above this region or below
    // next region.
    if ((y <= thisRegionTop) || (y >= nextRegionBottom))
    return;

    dividedObject->EraseLinks(dc);

    // Now calculate the new proportions of this region and the next region.
    double thisProportion = (double)((y - thisRegionTop)/dividedObject->GetHeight());
    double nextProportion = (double)((nextRegionBottom - y)/dividedObject->GetHeight());
    thisRegion->SetProportions(0.0, thisProportion);
    nextRegion->SetProportions(0.0, nextProportion);
    m_yoffset = (double)(y - dividedObject->GetY());

    // Now reformat text
    int i = 0;
    node = dividedObject->GetRegions().GetFirst();
    while (node)
    {
        wxShapeRegion *region = (wxShapeRegion *)node->GetData();
        if (region->GetText())
        {
        wxString s(region->GetText());
        dividedObject->FormatText(dc, s.c_str(), i);
        }
        node = node->GetNext();
        i++;
    }
    dividedObject->SetRegionSizes();
    dividedObject->Draw(dc);
    dividedObject->GetEventHandler()->OnMoveLinks(dc);
}