divided.cpp

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

/////////////////////////////////////////////////////////////////////////////
// Name:        divided.cpp
// Purpose:     wxDividedShape class
// Author:      Julian Smart
// Modified by:
// Created:     12/07/98
// RCS-ID:      $Id: divided.cpp,v 1.19 2005/10/06 18:17:21 ABX Exp $
// Copyright:   (c) Julian Smart
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"

#ifdef __BORLANDC__
#pragma hdrstop
#endif

#ifndef WX_PRECOMP
#include "wx/wx.h"
#endif

#if wxUSE_PROLOGIO
#include "wx/deprecated/wxexpr.h"
#endif

#include "wx/ogl/ogl.h"


class wxDividedShapeControlPoint: public wxControlPoint
{
 DECLARE_DYNAMIC_CLASS(wxDividedShapeControlPoint)
 private:
  int regionId;
 public:
  wxDividedShapeControlPoint() { regionId = 0; }
  wxDividedShapeControlPoint(wxShapeCanvas *the_canvas, wxShape *object, int region,
                            double size, double the_xoffset, double the_yoffset, int the_type);
  ~wxDividedShapeControlPoint();

  void OnDragLeft(bool draw, double x, double y, int keys=0, int attachment = 0);
  void OnBeginDragLeft(double x, double y, int keys=0, int attachment = 0);
  void OnEndDragLeft(double x, double y, int keys=0, int attachment = 0);
};

IMPLEMENT_DYNAMIC_CLASS(wxDividedShapeControlPoint, wxControlPoint)

/*
 * Divided object
 *
 */

IMPLEMENT_DYNAMIC_CLASS(wxDividedShape, wxRectangleShape)

wxDividedShape::wxDividedShape(double w, double h): wxRectangleShape(w, h)
{
  ClearRegions();
}

wxDividedShape::~wxDividedShape()
{
}

void wxDividedShape::OnDraw(wxDC& dc)
{
  wxRectangleShape::OnDraw(dc);
}

void wxDividedShape::OnDrawContents(wxDC& dc)
{
  double defaultProportion = (double)(GetRegions().GetCount() > 0 ? (1.0/((double)(GetRegions().GetCount()))) : 0.0);
  double currentY = (double)(m_ypos - (m_height / 2.0));
  double maxY = (double)(m_ypos + (m_height / 2.0));

  double leftX = (double)(m_xpos - (m_width / 2.0));
  double rightX = (double)(m_xpos + (m_width / 2.0));

  if (m_pen) dc.SetPen(* m_pen);

  dc.SetTextForeground(m_textColour);

#ifdef __WXMSW__
  // For efficiency, don't do this under X - doesn't make
  // any visible difference for our purposes.
  if (m_brush)
    dc.SetTextBackground(m_brush->GetColour());
#endif
/*
  if (!formatted)
  {
    FormatRegionText();
    formatted = true;
  }
*/
  if (GetDisableLabel()) return;

  double xMargin = 2;
  double yMargin = 2;
  dc.SetBackgroundMode(wxTRANSPARENT);

  wxObjectList::compatibility_iterator node = GetRegions().GetFirst();
  while (node)
  {
    wxShapeRegion *region = (wxShapeRegion *)node->GetData();
    dc.SetFont(* region->GetFont());
    dc.SetTextForeground(region->GetActualColourObject());

    double proportion =
      region->m_regionProportionY < 0.0 ? defaultProportion : region->m_regionProportionY;

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

    double centreX = m_xpos;
    double centreY = (double)(currentY + (actualY - currentY)/2.0);

    oglDrawFormattedText(dc, &region->m_formattedText,
             (double)(centreX), (double)(centreY), (double)(m_width-2*xMargin), (double)(actualY - currentY - 2*yMargin),
             region->m_formatMode);
    if ((y <= maxY) && (node->GetNext()))
    {
      wxPen *regionPen = region->GetActualPen();
      if (regionPen)
      {
        dc.SetPen(* regionPen);
        dc.DrawLine(WXROUND(leftX), WXROUND(y), WXROUND(rightX), WXROUND(y));
      }
    }

    currentY = actualY;

    node = node->GetNext();
  }
}

void wxDividedShape::SetSize(double w, double h, bool WXUNUSED(recursive))
{
  SetAttachmentSize(w, h);
  m_width = w;
  m_height = h;
  SetRegionSizes();
}

void wxDividedShape::SetRegionSizes()
{
  if (GetRegions().GetCount() == 0)
    return;

  double defaultProportion = (double)(GetRegions().GetCount() > 0 ? (1.0/((double)(GetRegions().GetCount()))) : 0.0);
  double currentY = (double)(m_ypos - (m_height / 2.0));
  double maxY = (double)(m_ypos + (m_height / 2.0));

//  double leftX = (double)(m_xpos - (m_width / 2.0));
//  double rightX = (double)(m_xpos + (m_width / 2.0));

  wxObjectList::compatibility_iterator node = GetRegions().GetFirst();
  while (node)
  {
    wxShapeRegion *region = (wxShapeRegion *)node->GetData();
    double proportion =
      region->m_regionProportionY <= 0.0 ? defaultProportion : region->m_regionProportionY;

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

    double centreY = (double)(currentY + (actualY - currentY)/2.0);

    region->SetSize(m_width, sizeY);
    region->SetPosition(0.0, (double)(centreY - m_ypos));
    currentY = actualY;
    node = node->GetNext();
  }
}

// Attachment points correspond to regions in the divided box
bool wxDividedShape::GetAttachmentPosition(int attachment, double *x, double *y, int nth, int no_arcs,
  wxLineShape *line)
{
  int totalNumberAttachments = (GetRegions().GetCount() * 2) + 2;
  if ((GetAttachmentMode() == ATTACHMENT_MODE_NONE) || (attachment >= totalNumberAttachments))
  {
    return wxShape::GetAttachmentPosition(attachment, x, y, nth, no_arcs);
  }

  int n = GetRegions().GetCount();
  bool isEnd = (line && line->IsEnd(this));

  double left = (double)(m_xpos - m_width/2.0);
  double right = (double)(m_xpos + m_width/2.0);
  double top = (double)(m_ypos - m_height/2.0);
  double bottom = (double)(m_ypos + m_height/2.0);

  // Zero is top, n+1 is bottom.
  if (attachment == 0)
  {
    *y = top;
    if (m_spaceAttachments)
    {
      if (line && (line->GetAlignmentType(isEnd) == LINE_ALIGNMENT_TO_NEXT_HANDLE))
      {
        // Align line according to the next handle along
        wxRealPoint *point = line->GetNextControlPoint(this);
        if (point->x < left)
          *x = left;
        else if (point->x > right)
          *x = right;
        else
          *x = point->x;
      }
      else
        *x = left + (nth + 1)*m_width/(no_arcs + 1);
    }
    else
      *x = m_xpos;
  }
  else if (attachment == (n+1))
  {
    *y = bottom;
    if (m_spaceAttachments)
    {
      if (line && (line->GetAlignmentType(isEnd) == LINE_ALIGNMENT_TO_NEXT_HANDLE))
      {
        // Align line according to the next handle along
        wxRealPoint *point = line->GetNextControlPoint(this);
        if (point->x < left)
          *x = left;
        else if (point->x > right)
          *x = right;
        else
          *x = point->x;
      }
      else
        *x = left + (nth + 1)*m_width/(no_arcs + 1);
    }
    else
      *x = m_xpos;
  }
  // Left or right.
  else
  {
    bool isLeft = !(attachment < (n+1));
    int i = (isLeft) ? (totalNumberAttachments - attachment - 1) : (attachment-1);
    wxObjectList::compatibility_iterator node = GetRegions().Item(i);
    if (node)
    {
      wxShapeRegion *region = (wxShapeRegion *)node->GetData();

      if (isLeft)
        *x = left;
      else
        *x = right;

      // Calculate top and bottom of region
      top = (double)((m_ypos + region->m_y) - (region->m_height/2.0));
      bottom = (double)((m_ypos + region->m_y) + (region->m_height/2.0));

      // Assuming we can trust the absolute size and
      // position of these regions...
      if (m_spaceAttachments)
      {
        if (line && (line->GetAlignmentType(isEnd) == LINE_ALIGNMENT_TO_NEXT_HANDLE))
        {
          // Align line according to the next handle along
          wxRealPoint *point = line->GetNextControlPoint(this);
          if (point->y < bottom)
            *y = bottom;
          else if (point->y > top)
            *y = top;
          else
            *y = point->y;
        }
        else
//          *y = (double)(((m_ypos + region->m_y) - (region->m_height/2.0)) + (nth + 1)*region->m_height/(no_arcs+1));
          *y = (double)(top + (nth + 1)*region->m_height/(no_arcs+1));
      }
      else
        *y = (double)(m_ypos + region->m_y);
    }
    else
    {
      *x = m_xpos;
      *y = m_ypos;
      return false;
    }
  }
  return true;
}

int wxDividedShape::GetNumberOfAttachments() const
{
  // There are two attachments for each region (left and right),
  // plus one on the top and one on the bottom.
  int n = (GetRegions().GetCount() * 2) + 2;

  int maxN = n - 1;
  wxObjectList::compatibility_iterator node = m_attachmentPoints.GetFirst();
  while (node)
  {
    wxAttachmentPoint *point = (wxAttachmentPoint *)node->GetData();
    if (point->m_id > maxN)
      maxN = point->m_id;
    node = node->GetNext();
  }
  return maxN + 1;
}

bool wxDividedShape::AttachmentIsValid(int attachment) const
{
  int totalNumberAttachments = (GetRegions().GetCount() * 2) + 2;
  if (attachment >= totalNumberAttachments)
  {
    return wxShape::AttachmentIsValid(attachment);
  }
  else if (attachment >= 0)
    return true;
  else
    return false;
}

void wxDividedShape::Copy(wxShape& copy)
{
  wxRectangleShape::Copy(copy);
}

// Region operations

void wxDividedShape::MakeControlPoints()
{
  wxRectangleShape::MakeControlPoints();

  MakeMandatoryControlPoints();
}

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

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

    double proportion = region->m_regionProportionY;

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

    if (node->GetNext())