mathplot.cpp

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// Name: mathplot.cpp
// Purpose: Framework for plotting in wxWindows
// Original Author: David Schalig
// Maintainer: Davide Rondini
// Contributors: Jose Luis Blanco, Val Greene, Maciej Suminski, Tomasz Wlostowski
// Created: 21/07/2003
// Last edit: 25/08/2016
// Copyright: (c) David Schalig, Davide Rondini
// Licence: wxWindows licence

#include <wx/window.h>

// Comment out for release operation:
// (Added by J.L.Blanco, Aug 2007)
//#define MATHPLOT_DO_LOGGING

#ifdef __BORLANDC__
#pragma hdrstop
#endif

#ifndef WX_PRECOMP
#include "wx/object.h"
#include "wx/font.h"
#include "wx/colour.h"
#include "wx/sizer.h"
#include "wx/intl.h"
#include "wx/dcclient.h"
#include "wx/cursor.h"
#endif

#include <widgets/mathplot.h>
#include <wx/module.h>
#include <wx/image.h>

#include <cmath>
#include <cstdio> // used only for debug
#include <ctime> // used for representation of x axes involving date
#include <set>

// Memory leak debugging
#ifdef _DEBUG
#define new DEBUG_NEW
#endif

// Legend margins
#define mpLEGEND_MARGIN 5
#define mpLEGEND_LINEWIDTH 10

// Number of pixels to scroll when scrolling by a line
#define mpSCROLL_NUM_PIXELS_PER_LINE 10

// See doxygen comments.
double mpWindow::zoomIncrementalFactor = 1.1;

// -----------------------------------------------------------------------------
// mpLayer
// -----------------------------------------------------------------------------

IMPLEMENT_ABSTRACT_CLASS( mpLayer, wxObject )

mpLayer::mpLayer() : m_type( mpLAYER_UNDEF )
{
 SetPen( (wxPen&) *wxBLACK_PEN );
 SetFont( (wxFont&) *wxNORMAL_FONT );
 m_continuous = false; // Default
 m_showName = true; // Default
 m_drawOutsideMargins = false;
 m_visible = true;
}


wxBitmap mpLayer::GetColourSquare( int side ) const
{
 wxBitmap square( side, side, -1 );
 wxColour filler = m_pen.GetColour();
 wxBrush brush( filler, wxBRUSHSTYLE_SOLID );
 wxMemoryDC dc;

 dc.SelectObject( square );
 dc.SetBackground( brush );
 dc.Clear();
 dc.SelectObject( wxNullBitmap );
 return square;
}


// -----------------------------------------------------------------------------
// mpInfoLayer
// -----------------------------------------------------------------------------
IMPLEMENT_DYNAMIC_CLASS( mpInfoLayer, mpLayer )

mpInfoLayer::mpInfoLayer()
{
 m_dim = wxRect( 0, 0, 1, 1 );
 m_brush = *wxTRANSPARENT_BRUSH;
 m_reference.x = 0; m_reference.y = 0;
 m_winX = 1; // parent->GetScrX();
 m_winY = 1; // parent->GetScrY();
 m_type = mpLAYER_INFO;
}


mpInfoLayer::mpInfoLayer( wxRect rect, const wxBrush* brush ) : m_dim( rect )
{
 m_brush = *brush;
 m_reference.x = rect.x;
 m_reference.y = rect.y;
 m_winX = 1; // parent->GetScrX();
 m_winY = 1; // parent->GetScrY();
 m_type = mpLAYER_INFO;
}


mpInfoLayer::~mpInfoLayer()
{
}


void mpInfoLayer::UpdateInfo( mpWindow& w, wxEvent& event )
{
}


bool mpInfoLayer::Inside( wxPoint& point )
{
 return m_dim.Contains( point );
}


void mpInfoLayer::Move( wxPoint delta )
{
 m_dim.SetX( m_reference.x + delta.x );
 m_dim.SetY( m_reference.y + delta.y );
}


void mpInfoLayer::UpdateReference()
{
 m_reference.x = m_dim.x;
 m_reference.y = m_dim.y;
}


void mpInfoLayer::Plot( wxDC& dc, mpWindow& w )
{
 if( m_visible )
 {
 // Adjust relative position inside the window
 int scrx = w.GetScrX();
 int scry = w.GetScrY();

 // Avoid dividing by 0
 if( scrx == 0 )
 scrx = 1;

 if( scry == 0 )
 scry = 1;

 if( (m_winX != scrx) || (m_winY != scry) )
 {
 if( m_winX > 1 )
 m_dim.x = (int) floor( (double) (m_dim.x * scrx / m_winX) );

 if( m_winY > 1 )
 {
 m_dim.y = (int) floor( (double) (m_dim.y * scry / m_winY) );
 UpdateReference();
 }

 // Finally update window size
 m_winX = scrx;
 m_winY = scry;
 }

 dc.SetPen( m_pen );
 // wxImage image0(wxT("pixel.png"), wxBITMAP_TYPE_PNG);
 // wxBitmap image1(image0);
 // wxBrush semiWhite(image1);
 dc.SetBrush( m_brush );
 dc.DrawRectangle( m_dim.x, m_dim.y, m_dim.width, m_dim.height );
 }
}


wxPoint mpInfoLayer::GetPosition() const
{
 return m_dim.GetPosition();
}


wxSize mpInfoLayer::GetSize() const
{
 return m_dim.GetSize();
}


mpInfoCoords::mpInfoCoords() : mpInfoLayer()
{
}


mpInfoCoords::mpInfoCoords( wxRect rect, const wxBrush* brush ) : mpInfoLayer( rect, brush )
{
}


mpInfoCoords::~mpInfoCoords()
{
}


void mpInfoCoords::UpdateInfo( mpWindow& w, wxEvent& event )
{
 if( event.GetEventType() == wxEVT_MOTION )
 {
 /* It seems that Windows port of wxWidgets don't support multi-line test to be drawn in a wxDC.
 * wxGTK instead works perfectly with it.
 * Info on wxForum: http://wxforum.shadonet.com/viewtopic.php?t=3451&highlight=drawtext+eol */
#ifdef _WINDOWS
 // FIXME m_content.Printf(wxT("x = %f y = %f"), XScale().P2x(w, mouseX), YScale().P2x(w, mouseY));
#else
 // FIXME m_content.Printf(wxT("x = %f\ny = %f"), XScale().P2x(w, mouseX), YScale().P2x(w, mouseY));
#endif
 }
}


void mpInfoCoords::Plot( wxDC& dc, mpWindow& w )
{
 if( m_visible )
 {
 // Adjust relative position inside the window
 int scrx = w.GetScrX();
 int scry = w.GetScrY();

 if( (m_winX != scrx) || (m_winY != scry) )
 {
 if( m_winX > 1 )
 m_dim.x = (int) floor( (double) (m_dim.x * scrx / m_winX) );

 if( m_winY > 1 )
 {
 m_dim.y = (int) floor( (double) (m_dim.y * scry / m_winY) );
 UpdateReference();
 }

 // Finally update window size
 m_winX = scrx;
 m_winY = scry;
 }

 dc.SetPen( m_pen );
 // wxImage image0(wxT("pixel.png"), wxBITMAP_TYPE_PNG);
 // wxBitmap image1(image0);
 // wxBrush semiWhite(image1);
 dc.SetBrush( m_brush );
 dc.SetFont( m_font );
 int textX, textY;
 dc.GetTextExtent( m_content, &textX, &textY );

 if( m_dim.width < textX + 10 )
 m_dim.width = textX + 10;

 if( m_dim.height < textY + 10 )
 m_dim.height = textY + 10;

 dc.DrawRectangle( m_dim.x, m_dim.y, m_dim.width, m_dim.height );
 dc.DrawText( m_content, m_dim.x + 5, m_dim.y + 5 );
 }
}


mpInfoLegend::mpInfoLegend() : mpInfoLayer()
{
}


mpInfoLegend::mpInfoLegend( wxRect rect, const wxBrush* brush ) : mpInfoLayer( rect, brush )
{
}


mpInfoLegend::~mpInfoLegend()
{
}


void mpInfoLegend::UpdateInfo( mpWindow& w, wxEvent& event )
{
}


void mpInfoLegend::Plot( wxDC& dc, mpWindow& w )
{
 if( m_visible )
 {
 // Adjust relative position inside the window
 int scrx = w.GetScrX();
 int scry = w.GetScrY();

 if( (m_winX != scrx) || (m_winY != scry) )
 {
 if( m_winX > 1 )
 m_dim.x = (int) floor( (double) (m_dim.x * scrx / m_winX) );

 if( m_winY > 1 )
 {
 m_dim.y = (int) floor( (double) (m_dim.y * scry / m_winY) );
 UpdateReference();
 }

 // Finally update window size
 m_winX = scrx;
 m_winY = scry;
 }

 // wxImage image0(wxT("pixel.png"), wxBITMAP_TYPE_PNG);
 // wxBitmap image1(image0);
 // wxBrush semiWhite(image1);
 dc.SetBrush( m_brush );
 dc.SetFont( m_font );
 const int baseWidth = (mpLEGEND_MARGIN * 2 + mpLEGEND_LINEWIDTH);
 int textX = baseWidth, textY = mpLEGEND_MARGIN;
 int plotCount = 0;
 int posY = 0;
 int tmpX = 0, tmpY = 0;
 mpLayer* ly = NULL;
 wxPen lpen;
 wxString label;

 for( unsigned int p = 0; p < w.CountAllLayers(); p++ )
 {
 ly = w.GetLayer( p );

 if( (ly->GetLayerType() == mpLAYER_PLOT) && ( ly->IsVisible() ) )
 {
 label = ly->GetName();
 dc.GetTextExtent( label, &tmpX, &tmpY );
 textX =
 ( textX > (tmpX + baseWidth) ) ? textX : (tmpX + baseWidth + mpLEGEND_MARGIN);
 textY += (tmpY);
 }
 }

 dc.SetPen( m_pen );
 dc.SetBrush( m_brush );
 m_dim.width = textX;

 if( textY != mpLEGEND_MARGIN ) // Don't draw any thing if there are no visible layers
 {
 textY += mpLEGEND_MARGIN;
 m_dim.height = textY;
 dc.DrawRectangle( m_dim.x, m_dim.y, m_dim.width, m_dim.height );

 for( unsigned int p2 = 0; p2 < w.CountAllLayers(); p2++ )
 {
 ly = w.GetLayer( p2 );

 if( (ly->GetLayerType() == mpLAYER_PLOT) && ( ly->IsVisible() ) )
 {
 label = ly->GetName();
 lpen = ly->GetPen();
 dc.GetTextExtent( label, &tmpX, &tmpY );
 dc.SetPen( lpen );
 // textX = (textX > (tmpX + baseWidth)) ? textX : (tmpX + baseWidth);
 // textY += (tmpY + mpLEGEND_MARGIN);
 posY = m_dim.y + mpLEGEND_MARGIN + plotCount * tmpY + (tmpY >> 1);
 dc.DrawLine( m_dim.x + mpLEGEND_MARGIN, // X start coord
 posY, // Y start coord
 m_dim.x + mpLEGEND_LINEWIDTH + mpLEGEND_MARGIN, // X end coord
 posY );
 // dc.DrawRectangle(m_dim.x + 5, m_dim.y + 5 + plotCount*tmpY, 5, 5);
 dc.DrawText( label,
 m_dim.x + baseWidth,
 m_dim.y + mpLEGEND_MARGIN + plotCount * tmpY );
 plotCount++;
 }
 }
 }
 }
}


// -----------------------------------------------------------------------------
// mpLayer implementations - functions
// -----------------------------------------------------------------------------

IMPLEMENT_ABSTRACT_CLASS( mpFX, mpLayer )

mpFX::mpFX( const wxString& name, int flags )
{
 SetName( name );
 m_flags = flags;
 m_type = mpLAYER_PLOT;
}


void mpFX::Plot( wxDC& dc, mpWindow& w )
{
 if( m_visible )
 {
 dc.SetPen( m_pen );

 wxCoord startPx = m_drawOutsideMargins ? 0 : w.GetMarginLeft();
 wxCoord endPx = m_drawOutsideMargins ? w.GetScrX() : w.GetScrX() - w.GetMarginRight();
 wxCoord minYpx = m_drawOutsideMargins ? 0 : w.GetMarginTop();
 wxCoord maxYpx = m_drawOutsideMargins ? w.GetScrY() : w.GetScrY() - w.GetMarginBottom();

 wxCoord iy = 0;

 if( m_pen.GetWidth() <= 1 )
 {
 for( wxCoord i = startPx; i < endPx; ++i )
 {
 iy = w.y2p( GetY( w.p2x( i ) ) );

 // Draw the point only if you can draw outside margins or if the point is inside margins
 if( m_drawOutsideMargins || ( (iy >= minYpx) && (iy <= maxYpx) ) )
 dc.DrawPoint( i, iy ); // (wxCoord) ((w.GetPosY() - GetY( (double)i / w.GetScaleX() + w.GetPosX()) ) * w.GetScaleY()));
 }
 }
 else
 {
 for( wxCoord i = startPx; i < endPx; ++i )
 {
 iy = w.y2p( GetY( w.p2x( i ) ) );

 // Draw the point only if you can draw outside margins or if the point is inside margins
 if( m_drawOutsideMargins || ( (iy >= minYpx) && (iy <= maxYpx) ) )
 dc.DrawLine( i, iy, i, iy );

 // wxCoord c = YScale().X2p( GetY(XScale().P2x(i)) );
 //(wxCoord) ((w.GetPosY() - GetY( (double)i / w.GetScaleX() + w.GetPosX()) ) * w.GetScaleY());
 }
 }

 if( !m_name.IsEmpty() && m_showName )
 {
 dc.SetFont( m_font );

 wxCoord tx, ty;
 dc.GetTextExtent( m_name, &tx, &ty );

 /*if ((m_flags & mpALIGNMASK) == mpALIGN_RIGHT)
 * tx = (w.GetScrX()>>1) - tx - 8;
 * else if ((m_flags & mpALIGNMASK) == mpALIGN_CENTER)
 * tx = -tx/2;
 * else
 * tx = -(w.GetScrX()>>1) + 8;
 */
 if( (m_flags & mpALIGNMASK) == mpALIGN_RIGHT )
 tx = (w.GetScrX() - tx) - w.GetMarginRight() - 8;
 else if( (m_flags & mpALIGNMASK) == mpALIGN_CENTER )
 tx = ( (w.GetScrX() - w.GetMarginRight() - w.GetMarginLeft() - tx) / 2 ) +
 w.GetMarginLeft();
 else
 tx = w.GetMarginLeft() + 8;

 dc.DrawText( m_name, tx, w.y2p( GetY( w.p2x( tx ) ) ) );
 }
 }
}


IMPLEMENT_ABSTRACT_CLASS( mpFY, mpLayer )

mpFY::mpFY( const wxString& name, int flags )
{
 SetName( name );
 m_flags = flags;
 m_type = mpLAYER_PLOT;
}


void mpFY::Plot( wxDC& dc, mpWindow& w )
{
 if( m_visible )
 {
 dc.SetPen( m_pen );

 wxCoord i, ix;

 wxCoord startPx = m_drawOutsideMargins ? 0 : w.GetMarginLeft();
 wxCoord endPx = m_drawOutsideMargins ? w.GetScrX() : w.GetScrX() - w.GetMarginRight();
 wxCoord minYpx = m_drawOutsideMargins ? 0 : w.GetMarginTop();
 wxCoord maxYpx = m_drawOutsideMargins ? w.GetScrY() : w.GetScrY() - w.GetMarginBottom();

 if( m_pen.GetWidth() <= 1 )
 {
 for( i = minYpx; i < maxYpx; ++i )
 {
 ix = w.x2p( GetX( w.p2y( i ) ) );

 if( m_drawOutsideMargins || ( (ix >= startPx) && (ix <= endPx) ) )
 dc.DrawPoint( ix, i );
 }
 }
 else
 {
 for( i = 0; i< w.GetScrY(); ++i )
 {
 ix = w.x2p( GetX( w.p2y( i ) ) );

 if( m_drawOutsideMargins || ( (ix >= startPx) && (ix <= endPx) ) )
 dc.DrawLine( ix, i, ix, i );

 // wxCoord c = XScale().X2p(GetX(YScale().P2x(i)));
 //(wxCoord) ((GetX( (double)i / w.GetScaleY() + w.GetPosY()) - w.GetPosX()) * w.GetScaleX());
 // dc.DrawLine(c, i, c, i);
 }
 }

 if( !m_name.IsEmpty() && m_showName )
 {
 dc.SetFont( m_font );

 wxCoord tx, ty;
 dc.GetTextExtent( m_name, &tx, &ty );

 if( (m_flags & mpALIGNMASK) == mpALIGN_TOP )
 ty = w.GetMarginTop() + 8;
 else if( (m_flags & mpALIGNMASK) == mpALIGN_CENTER )
 ty = ( (w.GetScrY() - w.GetMarginTop() - w.GetMarginBottom() - ty) / 2 ) +
 w.GetMarginTop();
 else
 ty = w.GetScrY() - 8 - ty - w.GetMarginBottom();

 dc.DrawText( m_name, w.x2p( GetX( w.p2y( ty ) ) ), ty ); // (wxCoord) ((GetX( (double)i / w.GetScaleY() + w.GetPosY()) - w.GetPosX()) * w.GetScaleX()), -ty);
 }
 }
}


IMPLEMENT_ABSTRACT_CLASS( mpFXY, mpLayer )

mpFXY::mpFXY( const wxString& name, int flags )
{
 SetName( name );
 m_flags = flags;
 m_type = mpLAYER_PLOT;
 m_scaleX = NULL;
 m_scaleY = NULL;

 // Avoid not initialized members:
 maxDrawX = minDrawX = maxDrawY = minDrawY = 0;
}


void mpFXY::UpdateViewBoundary( wxCoord xnew, wxCoord ynew )
{
 // Keep track of how many points have been drawn and the bounding box
 maxDrawX = (xnew > maxDrawX) ? xnew : maxDrawX;
 minDrawX = (xnew < minDrawX) ? xnew : minDrawX;
 maxDrawY = (maxDrawY > ynew) ? maxDrawY : ynew;
 minDrawY = (minDrawY < ynew) ? minDrawY : ynew;
 // drawnPoints++;
}


void mpFXY::Plot( wxDC& dc, mpWindow& w )
{
 if( m_visible )
 {
 dc.SetPen( m_pen );

 double x, y;
 // Do this to reset the counters to evaluate bounding box for label positioning
 Rewind(); GetNextXY( x, y );
 maxDrawX = x; minDrawX = x; maxDrawY = y; minDrawY = y;
 // drawnPoints = 0;
 Rewind();

 wxCoord startPx = m_drawOutsideMargins ? 0 : w.GetMarginLeft();
 wxCoord endPx = m_drawOutsideMargins ? w.GetScrX() : w.GetScrX() - w.GetMarginRight();
 wxCoord minYpx = m_drawOutsideMargins ? 0 : w.GetMarginTop();
 wxCoord maxYpx = m_drawOutsideMargins ? w.GetScrY() : w.GetScrY() - w.GetMarginBottom();

 dc.SetClippingRegion( startPx, minYpx, endPx - startPx + 1, maxYpx - minYpx + 1 );

 if( !m_continuous )
 {
 bool first = true;
 wxCoord ix = 0;
 std::set<wxCoord> ys;

 while( GetNextXY( x, y ) )
 {
 double px = m_scaleX->TransformToPlot( x );
 double py = m_scaleY->TransformToPlot( y );
 wxCoord newX = w.x2p( px );

 if( first )
 {
 ix = newX;
 first = false;
 }

 if( newX == ix ) // continue until a new X coordinate is reached
 {
 // collect all unique points
 ys.insert( w.y2p( py ) );
 continue;
 }

 for( auto& iy: ys )
 {
 if( m_drawOutsideMargins
 || ( (ix >= startPx) && (ix <= endPx) && (iy >= minYpx)
 && (iy <= maxYpx) ) )
 {
 // for some reason DrawPoint does not use the current pen,
 // so we use DrawLine for fat pens
 if( m_pen.GetWidth() <= 1 )
 {
 dc.DrawPoint( ix, iy );
 }
 else
 {
 dc.DrawLine( ix, iy, ix, iy );
 }

 UpdateViewBoundary( ix, iy );
 }
 }

 ys.clear();
 ix = newX;
 ys.insert( w.y2p( py ) );
 }
 }
 else
 {
 int count = 0;
 int x0=0; // X position of merged current vertical line
 int ymin0=0; // y min coord of merged current vertical line
 int ymax0=0; // y max coord of merged current vertical line
 int dupx0 = 0; // count of currently merged vertical lines
 wxPoint line_start; // starting point of the current line to draw

 // A buffer to store coordinates of lines to draw
 std::vector<wxPoint>pointList;
 pointList.reserve( endPx - startPx + 1 );

 // Note: we can use dc.DrawLines() only for a reasonable number or points (<10000),
 // because at least on Windows dc.DrawLines() can hang for a lot of points.
 // (> 10000 points) (can happens when a lot of points is calculated)
 // To avoid long draw time (and perhaps hanging) one plot only not redundant lines.
 // To avoid artifacts when skipping points to the same x coordinate, for each
 // group of points at a give, x coordinate we also draw a vertical line at this coord,
 // from the ymin to the ymax vertical coordinates of skipped points
 while( GetNextXY( x, y ) )
 {
 double px = m_scaleX->TransformToPlot( x );
 double py = m_scaleY->TransformToPlot( y );

 wxCoord x1 = w.x2p( px );
 wxCoord y1 = w.y2p( py );

 // Store only points on the drawing area, to speed up the drawing time
 // Note: x1 is a value truncated from px by w.x2p(). So to be sure the
 // first point is drawn, the x1 low limit is startPx-1 in plot coordinates
 if( x1 >= startPx-1 && x1 <= endPx )
 {
 if( !count || line_start.x != x1 )
 {
 if( count && dupx0 > 1 && ymin0 != ymax0 )
 {
 // Vertical points are merged, draw the pending vertical line
 // However, if the line is one pixel length, it is not drawn,
 // because the main trace show this point
 dc.DrawLine( x0, ymin0, x0, ymax0 );
 }

 x0 = x1;
 ymin0 = ymax0 = y1;
 dupx0 = 0;

 pointList.emplace_back( wxPoint( x1, y1 ) );

 line_start.x = x1;
 line_start.y = y1;
 count++;
 }
 else
 {
 ymin0 = std::min( ymin0, y1 );
 ymax0 = std::max( ymax0, y1 );
 x0 = x1;
 dupx0++;
 }
 }
 }

 if( pointList.size() > 1 )
 {
 // For a better look (when using dashed lines) and more optimization,
 // try to merge horizontal segments, in order to plot longer lines
 // we are merging horizontal segments because this is easy,
 // and horizontal segments are a frequent cases
 std::vector<wxPoint> drawPoints;
 drawPoints.reserve( endPx - startPx + 1 );

 drawPoints.push_back( pointList[0] ); // push the first point in list

 for( size_t ii = 1; ii < pointList.size()-1; ii++ )
 {
 // Skip intermediate points between the first point and the last
 // point of the segment candidate
 if( drawPoints.back().y == pointList[ii].y &&
 drawPoints.back().y == pointList[ii+1].y )
 continue;
 else
 drawPoints.push_back( pointList[ii] );
 }

 // push the last point to draw in list
 if( drawPoints.back() != pointList.back() )
 drawPoints.push_back( pointList.back() );

 dc.DrawLines( drawPoints.size(), &drawPoints[0] );
 }
 }

 if( !m_name.IsEmpty() && m_showName )
 {
 dc.SetFont( m_font );

 wxCoord tx, ty;
 dc.GetTextExtent( m_name, &tx, &ty );

 // xxx implement else ... if (!HasBBox())
 {
 // const int sx = w.GetScrX();
 // const int sy = w.GetScrY();

 if( (m_flags & mpALIGNMASK) == mpALIGN_NW )
 {
 tx = minDrawX + 8;
 ty = maxDrawY + 8;
 }
 else if( (m_flags & mpALIGNMASK) == mpALIGN_NE )
 {
 tx = maxDrawX - tx - 8;
 ty = maxDrawY + 8;
 }
 else if( (m_flags & mpALIGNMASK) == mpALIGN_SE )
 {
 tx = maxDrawX - tx - 8;
 ty = minDrawY - ty - 8;
 }
 else
 {
 // mpALIGN_SW
 tx = minDrawX + 8;
 ty = minDrawY - ty - 8;
 }
 }

 dc.DrawText( m_name, tx, ty );
 }
 }

 dc.DestroyClippingRegion();
}


// -----------------------------------------------------------------------------
// mpProfile implementation
// -----------------------------------------------------------------------------

IMPLEMENT_ABSTRACT_CLASS( mpProfile, mpLayer )

mpProfile::mpProfile( const wxString& name, int flags )
{
 SetName( name );
 m_flags = flags;
 m_type = mpLAYER_PLOT;
}


void mpProfile::Plot( wxDC& dc, mpWindow& w )
{
 if( m_visible )
 {
 dc.SetPen( m_pen );

 wxCoord startPx = m_drawOutsideMargins ? 0 : w.GetMarginLeft();
 wxCoord endPx = m_drawOutsideMargins ? w.GetScrX() : w.GetScrX() - w.GetMarginRight();
 wxCoord minYpx = m_drawOutsideMargins ? 0 : w.GetMarginTop();
 wxCoord maxYpx = m_drawOutsideMargins ? w.GetScrY() : w.GetScrY() - w.GetMarginBottom();

 // Plot profile linking subsequent point of the profile, instead of mpFY, which plots simple points.
 for( wxCoord i = startPx; i < endPx; ++i )
 {
 wxCoord c0 = w.y2p( GetY( w.p2x( i ) ) ); // (wxCoord) ((w.GetYpos() - GetY( (double)i / w.GetXscl() + w.GetXpos()) ) * w.GetYscl());
 wxCoord c1 = w.y2p( GetY( w.p2x( i + 1 ) ) ); // (wxCoord) ((w.GetYpos() - GetY( (double)(i+1) / w.GetXscl() + (w.GetXpos() ) ) ) * w.GetYscl());

 // c0 = (c0 <= maxYpx) ? ((c0 >= minYpx) ? c0 : minYpx) : maxYpx;
 // c1 = (c1 <= maxYpx) ? ((c1 >= minYpx) ? c1 : minYpx) : maxYpx;
 if( !m_drawOutsideMargins )
 {
 c0 = (c0 <= maxYpx) ? ( (c0 >= minYpx) ? c0 : minYpx ) : maxYpx;
 c1 = (c1 <= maxYpx) ? ( (c1 >= minYpx) ? c1 : minYpx ) : maxYpx;
 }

 dc.DrawLine( i, c0, i + 1, c1 );
 }

 ;

 if( !m_name.IsEmpty() )
 {
 dc.SetFont( m_font );

 wxCoord tx, ty;
 dc.GetTextExtent( m_name, &tx, &ty );

 if( (m_flags & mpALIGNMASK) == mpALIGN_RIGHT )
 tx = (w.GetScrX() - tx) - w.GetMarginRight() - 8;
 else if( (m_flags & mpALIGNMASK) == mpALIGN_CENTER )
 tx = ( (w.GetScrX() - w.GetMarginRight() - w.GetMarginLeft() - tx) / 2 ) +
 w.GetMarginLeft();
 else
 tx = w.GetMarginLeft() + 8;

 dc.DrawText( m_name, tx, w.y2p( GetY( w.p2x( tx ) ) ) ); // (wxCoord) ((w.GetPosY() - GetY( (double)tx / w.GetScaleX() + w.GetPosX())) * w.GetScaleY()) );
 }
 }
}


// -----------------------------------------------------------------------------
// mpLayer implementations - furniture (scales, ...)
// -----------------------------------------------------------------------------

#define mpLN10 2.3025850929940456840179914546844

void mpScaleX::recalculateTicks( wxDC& dc, mpWindow& w )
{
 double minV, maxV, minVvis, maxVvis;

 GetDataRange( minV, maxV );
 getVisibleDataRange( w, minVvis, maxVvis );

 m_absVisibleMaxV = std::max( std::abs( minVvis ), std::abs( maxVvis ) );

 m_tickValues.clear();
 m_tickLabels.clear();

 double minErr = 1000000000000.0;
 double bestStep = 1.0;

 for( int i = 10; i <= 20; i += 2 )
 {
 double curr_step = fabs( maxVvis - minVvis ) / (double) i;
 double base = pow( 10, floor( log10( curr_step ) ) );
 double stepInt = floor( curr_step / base ) * base;
 double err = fabs( curr_step - stepInt );

 if( err < minErr )
 {
 minErr = err;
 bestStep = stepInt;
 }
 }


 double v = floor( minVvis / bestStep ) * bestStep;

 double zeroOffset = 100000000.0;

 while( v < maxVvis )
 {
 m_tickValues.push_back( v );

 if( fabs( v ) < zeroOffset )
 zeroOffset = fabs( v );

 v += bestStep;
 }

 if( zeroOffset <= bestStep )
 {
 for( double& t : m_tickValues )
 t -= zeroOffset;
 }

 for( double t : m_tickValues )
 {
 m_tickLabels.emplace_back( t );
 }

 updateTickLabels( dc, w );
}


mpScaleBase::mpScaleBase()
{
 m_rangeSet = false;
 m_nameFlags = mpALIGN_BORDER_BOTTOM;

 // initialize these members mainly to avoid not initialized values
 m_offset = 0.0;
 m_scale = 1.0;
 m_absVisibleMaxV = 0.0;
 m_flags = 0; // Flag for axis alignment
 m_ticks = true; // Flag to toggle between ticks or grid
 m_minV = 0.0;
 m_maxV = 0.0;
 m_maxLabelHeight = 1;
 m_maxLabelWidth = 1;
}


void mpScaleBase::computeLabelExtents( wxDC& dc, mpWindow& w )
{
 m_maxLabelHeight = 0;
 m_maxLabelWidth = 0;

 for( int n = 0; n < labelCount(); n++ )
 {
 int tx, ty;
 const wxString s = getLabel( n );

 dc.GetTextExtent( s, &tx, &ty );
 m_maxLabelHeight = std::max( ty, m_maxLabelHeight );
 m_maxLabelWidth = std::max( tx, m_maxLabelWidth );
 }
}


void mpScaleBase::updateTickLabels( wxDC& dc, mpWindow& w )
{
 formatLabels();
 computeLabelExtents( dc, w );

 // int gap = IsHorizontal() ? m_maxLabelWidth + 10 : m_maxLabelHeight + 5;

 // if ( m_tickLabels.size() <= 2)
 // return;

 /*
 * fixme!
 *
 * for ( auto &l : m_tickLabels )
 * {
 * double p = TransformToPlot ( l.pos );
 *
 * if ( !IsHorizontal() )
 * l.pixelPos = (int)(( w.GetPosY() - p ) * w.GetScaleY());
 * else
 * l.pixelPos = (int)(( p - w.GetPosX()) * w.GetScaleX());
 * }
 *
 *
 * for (int i = 1; i < m_tickLabels.size() - 1; i++)
 * {
 * int dist_prev;
 *
 * for(int j = i-1; j >= 1; j--)
 * {
 * if( m_tickLabels[j].visible)
 * {
 * dist_prev = abs( m_tickLabels[j].pixelPos - m_tickLabels[i].pixelPos );
 * break;
 * }
 * }
 *
 * if (dist_prev < gap)
 * m_tickLabels[i].visible = false;
 * }
 */
}


void mpScaleY::getVisibleDataRange( mpWindow& w, double& minV, double& maxV )
{
 wxCoord minYpx = m_drawOutsideMargins ? 0 : w.GetMarginTop();
 wxCoord maxYpx = m_drawOutsideMargins ? w.GetScrY() : w.GetScrY() - w.GetMarginBottom();

 double pymin = w.p2y( minYpx );
 double pymax = w.p2y( maxYpx );

 minV = TransformFromPlot( pymax );
 maxV = TransformFromPlot( pymin );
}


void mpScaleY::computeSlaveTicks( mpWindow& w )
{
 if( m_masterScale->m_tickValues.size() == 0 )
 return;

 m_tickValues.clear();
 m_tickLabels.clear();

 double p0 = m_masterScale->TransformToPlot( m_masterScale->m_tickValues[0] );
 double p1 = m_masterScale->TransformToPlot( m_masterScale->m_tickValues[1] );

 m_scale = 1.0 / ( m_maxV - m_minV );
 m_offset = -m_minV;

 double y_slave0 = p0 / m_scale;
 double y_slave1 = p1 / m_scale;

 double dy_slave = (y_slave1 - y_slave0);
 double exponent = floor( log10( dy_slave ) );
 double base = dy_slave / pow( 10.0, exponent );

 double dy_scaled = ceil( 2.0 * base ) / 2.0 * pow( 10.0, exponent );

 double minvv, maxvv;

 getVisibleDataRange( w, minvv, maxvv );

 minvv = floor( minvv / dy_scaled ) * dy_scaled;

 m_scale = 1.0 / ( m_maxV - m_minV );
 m_scale *= dy_slave / dy_scaled;

 m_offset = p0 / m_scale - minvv;

 m_tickValues.clear();

 double m;

 m_absVisibleMaxV = 0;

 for( unsigned int i = 0; i < m_masterScale->m_tickValues.size(); i++ )
 {
 m = TransformFromPlot( m_masterScale->TransformToPlot( m_masterScale->m_tickValues[i] ) );
 m_tickValues.push_back( m );
 m_tickLabels.emplace_back( m );
 m_absVisibleMaxV = std::max( m_absVisibleMaxV, fabs( m ) );
 }
}


void mpScaleY::recalculateTicks( wxDC& dc, mpWindow& w )
{
 if( m_masterScale )
 {
 computeSlaveTicks( w );
 updateTickLabels( dc, w );

 return;
 }

 double minV, maxV, minVvis, maxVvis;
 GetDataRange( minV, maxV );
 getVisibleDataRange( w, minVvis, maxVvis );

 m_absVisibleMaxV = std::max( std::abs( minVvis ), std::abs( maxVvis ) );
 m_tickValues.clear();
 m_tickLabels.clear();

 double minErr = 1000000000000.0;
 double bestStep = 1.0;

 for( int i = 10; i <= 20; i += 2 )
 {
 double curr_step = fabs( maxVvis - minVvis ) / (double) i;
 double base = pow( 10, floor( log10( curr_step ) ) );
 double stepInt = floor( curr_step / base ) * base;
 double err = fabs( curr_step - stepInt );

 if( err< minErr )
 {
 minErr = err;
 bestStep = stepInt;
 }
 }


 double v = floor( minVvis / bestStep ) * bestStep;

 double zeroOffset = 100000000.0;

 const int iterLimit = 1000;
 int i = 0;

 while( v < maxVvis && i < iterLimit )
 {
 m_tickValues.push_back( v );

 if( fabs( v ) < zeroOffset )
 zeroOffset = fabs( v );

 v += bestStep;
 i++;
 }


 // something weird happened...
 if( i == iterLimit )
 {
 m_tickValues.clear();
 }

 if( zeroOffset <= bestStep )
 {
 for( double& t : m_tickValues )
 t -= zeroOffset;
 }

 for( double t : m_tickValues )
 m_tickLabels.emplace_back( t );


 // n0 = floor(minVvis / bestStep) * bestStep;
 // end = n0 +

 // n0 = floor( (w.GetPosX() ) / step ) * step ;
 updateTickLabels( dc, w );

 // labelStep = ceil(((double) m_maxLabelWidth + mpMIN_X_AXIS_LABEL_SEPARATION)/(w.GetScaleX()*step))*step;
}


void mpScaleXBase::getVisibleDataRange( mpWindow& w, double& minV, double& maxV )
{
 wxCoord startPx = m_drawOutsideMargins ? 0 : w.GetMarginLeft();
 wxCoord endPx = m_drawOutsideMargins ? w.GetScrX() : w.GetScrX() - w.GetMarginRight();
 double pxmin = w.p2x( startPx );
 double pxmax = w.p2x( endPx );

 minV = TransformFromPlot( pxmin );
 maxV = TransformFromPlot( pxmax );
}


void mpScaleXLog::recalculateTicks( wxDC& dc, mpWindow& w )
{
 double minV, maxV, minVvis, maxVvis;

 GetDataRange( minV, maxV );
 getVisibleDataRange( w, minVvis, maxVvis );

 // double decades = log( maxV / minV ) / log(10);
 double minDecade = pow( 10, floor( log10( minV ) ) );
 double maxDecade = pow( 10, ceil( log10( maxV ) ) );
 double visibleDecades = log( maxVvis / minVvis ) / log( 10 );

 double d;

 m_tickValues.clear();
 m_tickLabels.clear();

 if( minDecade == 0.0 )
 return;


 for( d = minDecade; d<=maxDecade; d *= 10.0 )
 {
 m_tickLabels.emplace_back( d );

 for( double dd = d; dd < d * 10; dd += d )
 {
 if( visibleDecades < 2 )
 m_tickLabels.emplace_back( dd );

 m_tickValues.push_back( dd );
 }
 }

 updateTickLabels( dc, w );
}


IMPLEMENT_ABSTRACT_CLASS( mpScaleXBase, mpLayer )
IMPLEMENT_DYNAMIC_CLASS( mpScaleX, mpScaleXBase )
IMPLEMENT_DYNAMIC_CLASS( mpScaleXLog, mpScaleXBase )

mpScaleXBase::mpScaleXBase( const wxString& name, int flags, bool ticks, unsigned int type )
{
 SetName( name );
 SetFont( (wxFont&) *wxSMALL_FONT );
 SetPen( (wxPen&) *wxGREY_PEN );
 m_flags = flags;
 m_ticks = ticks;
 // m_labelType = type;
 m_type = mpLAYER_AXIS;
}


mpScaleX::mpScaleX( const wxString& name, int flags, bool ticks, unsigned int type ) :
 mpScaleXBase( name, flags, ticks, type )
{
}


mpScaleXLog::mpScaleXLog( const wxString& name, int flags, bool ticks, unsigned int type ) :
 mpScaleXBase( name, flags, ticks, type )
{
}


void mpScaleXBase::Plot( wxDC& dc, mpWindow& w )
{
 int tx, ty;

 m_offset = -m_minV;
 m_scale = 1.0 / ( m_maxV - m_minV );

 recalculateTicks( dc, w );

 if( m_visible )
 {
 dc.SetPen( m_pen );
 dc.SetFont( m_font );
 int orgy = 0;

 const int extend = w.GetScrX(); 

 if( m_flags == mpALIGN_CENTER )
 orgy = w.y2p( 0 ); // (int)(w.GetPosY() * w.GetScaleY());

 if( m_flags == mpALIGN_TOP )
 {
 if( m_drawOutsideMargins )
 orgy = X_BORDER_SEPARATION;
 else
 orgy = w.GetMarginTop();
 }

 if( m_flags == mpALIGN_BOTTOM )
 {
 if( m_drawOutsideMargins )
 orgy = X_BORDER_SEPARATION;
 else
 orgy = w.GetScrY() - w.GetMarginBottom();
 }

 if( m_flags == mpALIGN_BORDER_BOTTOM )
 orgy = w.GetScrY() - 1; // dc.LogicalToDeviceY(0) - 1;

 if( m_flags == mpALIGN_BORDER_TOP )
 orgy = 1; // -dc.LogicalToDeviceY(0);

 // dc.DrawLine( 0, orgy, w.GetScrX(), orgy);

 wxCoord startPx = m_drawOutsideMargins ? 0 : w.GetMarginLeft();
 wxCoord endPx = m_drawOutsideMargins ? w.GetScrX() : w.GetScrX() - w.GetMarginRight();
 wxCoord minYpx = m_drawOutsideMargins ? 0 : w.GetMarginTop();
 wxCoord maxYpx = m_drawOutsideMargins ? w.GetScrY() : w.GetScrY() - w.GetMarginBottom();

 // int tmp=-65535;
 int labelH = m_maxLabelHeight; // Control labels height to decide where to put axis name (below labels or on top of axis)

 // int maxExtent = tc.MaxLabelWidth();
 for( int n = 0; n < tickCount(); n++ )
 {
 double tp = getTickPos( n );

 // double xlogmin = log10 ( m_minV );
 // double xlogmax = log10 ( m_maxV );

 double px = TransformToPlot( tp ); // ( log10 ( tp ) - xlogmin) / (xlogmax - xlogmin);

 const int p = (int) ( ( px - w.GetPosX() ) * w.GetScaleX() );

 if( (p >= startPx) && (p <= endPx) )
 {
 if( m_ticks ) // draw axis ticks
 {
 if( m_flags == mpALIGN_BORDER_BOTTOM )
 dc.DrawLine( p, orgy, p, orgy - 4 );
 else
 dc.DrawLine( p, orgy, p, orgy + 4 );
 }
 else // draw grid dotted lines
  {
 m_pen.SetStyle( wxPENSTYLE_DOT );
 dc.SetPen( m_pen );

 if( (m_flags == mpALIGN_BOTTOM) && !m_drawOutsideMargins )
 {
 m_pen.SetStyle( wxPENSTYLE_DOT );
 dc.SetPen( m_pen );
 dc.DrawLine( p, orgy + 4, p, minYpx );
 m_pen.SetStyle( wxPENSTYLE_SOLID );
 dc.SetPen( m_pen );
 dc.DrawLine( p, orgy + 4, p, orgy - 4 );
 }
 else
 {
 if( (m_flags == mpALIGN_TOP) && !m_drawOutsideMargins )
 {
 dc.DrawLine( p, orgy - 4, p, maxYpx );
 }
 else
 {
 dc.DrawLine( p, minYpx, p, maxYpx ); // 0/*-w.GetScrY()*/, p, w.GetScrY() );
 }
 }

 m_pen.SetStyle( wxPENSTYLE_SOLID );
 dc.SetPen( m_pen );
 }
 }
 }

 m_pen.SetStyle( wxPENSTYLE_SOLID );
 dc.SetPen( m_pen );
 dc.DrawLine( startPx, minYpx, endPx, minYpx );
 dc.DrawLine( startPx, maxYpx, endPx, maxYpx );

 // Actually draw labels, taking care of not overlapping them, and distributing them
 // regularly
 for( int n = 0; n < labelCount(); n++ )
 {
 double tp = getLabelPos( n );

 if( !m_tickLabels[n].visible )
 continue;

 // double xlogmin = log10 ( m_minV );
 // double xlogmax = log10 ( m_maxV );

 double px = TransformToPlot( tp ); // ( log10 ( tp ) - xlogmin) / (xlogmax - xlogmin);

 const int p = (int) ( ( px - w.GetPosX() ) * w.GetScaleX() );

 if( (p >= startPx) && (p <= endPx) )
 {
 // Write ticks labels in s string
 wxString s = m_tickLabels[n].label;

 dc.GetTextExtent( s, &tx, &ty );

 if( (m_flags == mpALIGN_BORDER_BOTTOM) || (m_flags == mpALIGN_TOP) )
 {
 dc.DrawText( s, p - tx / 2, orgy - 4 - ty );
 }
 else
 {
 dc.DrawText( s, p - tx / 2, orgy + 4 );
 }
 }
 }

 // Draw axis name
 dc.GetTextExtent( m_name, &tx, &ty );

 switch( m_nameFlags )
 {
 case mpALIGN_BORDER_BOTTOM:
 dc.DrawText( m_name, extend - tx - 4, orgy - 8 - ty - labelH );
 break;

 case mpALIGN_BOTTOM:
 {
 dc.DrawText( m_name, (endPx + startPx) / 2 - tx / 2, orgy + 6 + labelH );
 }
 break;

 case mpALIGN_CENTER:
 dc.DrawText( m_name, extend - tx - 4, orgy - 4 - ty );
 break;

 case mpALIGN_TOP:
 {
 if( (!m_drawOutsideMargins) && ( w.GetMarginTop() > (ty + labelH + 8) ) )
 {
 dc.DrawText( m_name, (endPx - startPx - tx) >> 1, orgy - 6 - ty - labelH );
 }
 else
 {
 dc.DrawText( m_name, extend - tx - 4, orgy + 4 );
 }
 }
 break;

 case mpALIGN_BORDER_TOP:
  dc.DrawText( m_name, extend - tx - 4, orgy + 6 + labelH );
 break;

 default:
 break;
 }
 }
}


IMPLEMENT_DYNAMIC_CLASS( mpScaleY, mpLayer )

mpScaleY::mpScaleY( const wxString& name, int flags, bool ticks )
{
 SetName( name );
 SetFont( (wxFont&) *wxSMALL_FONT );
 SetPen( (wxPen&) *wxGREY_PEN );
 m_flags = flags;
 m_ticks = ticks;
 m_type = mpLAYER_AXIS;
 m_masterScale = NULL;
 m_nameFlags = mpALIGN_BORDER_LEFT;
}


void mpScaleY::Plot( wxDC& dc, mpWindow& w )
{
 m_offset = -m_minV;
 m_scale = 1.0 / ( m_maxV - m_minV );

 recalculateTicks( dc, w );

 if( m_visible )
 {
 dc.SetPen( m_pen );
 dc.SetFont( m_font );

 int orgx = 0;

 // const int extend = w.GetScrY(); // /2;
 if( m_flags == mpALIGN_CENTER )
 orgx = w.x2p( 0 ); // (int)(w.GetPosX() * w.GetScaleX());

 if( m_flags == mpALIGN_LEFT )
 {
 if( m_drawOutsideMargins )
 orgx = Y_BORDER_SEPARATION;
 else
 orgx = w.GetMarginLeft();
 }

 if( m_flags == mpALIGN_RIGHT )
 {
 if( m_drawOutsideMargins )
 orgx = w.GetScrX() - Y_BORDER_SEPARATION;
 else
 orgx = w.GetScrX() - w.GetMarginRight();
 }

 if( m_flags == mpALIGN_BORDER_RIGHT )
 orgx = w.GetScrX() - 1; // dc.LogicalToDeviceX(0) - 1;

 if( m_flags == mpALIGN_BORDER_LEFT )
 orgx = 1; // -dc.LogicalToDeviceX(0);

 wxCoord endPx = m_drawOutsideMargins ? w.GetScrX() : w.GetScrX() - w.GetMarginRight();
 wxCoord minYpx = m_drawOutsideMargins ? 0 : w.GetMarginTop();
 wxCoord maxYpx = m_drawOutsideMargins ? w.GetScrY() : w.GetScrY() - w.GetMarginBottom();
 // Draw line
 dc.DrawLine( orgx, minYpx, orgx, maxYpx );


 wxCoord tx, ty;
 wxString s;
 wxString fmt;
 int n = 0;


 int labelW = 0;
 // Before staring cycle, calculate label height
 int labelHeight = 0;
 s.Printf( fmt, n );
 dc.GetTextExtent( s, &tx, &labelHeight );

 for( n = 0; n < tickCount(); n++ )
 {
 double tp = getTickPos( n );

 double py = TransformToPlot( tp ); // ( log10 ( tp ) - xlogmin) / (xlogmax - xlogmin);
 const int p = (int) ( ( w.GetPosY() - py ) * w.GetScaleY() );


 if( (p >= minYpx) && (p <= maxYpx) )
 {
 if( m_ticks ) // Draw axis ticks
 {
 if( m_flags == mpALIGN_BORDER_LEFT )
 {
 dc.DrawLine( orgx, p, orgx + 4, p );
 }
 else
 {
 dc.DrawLine( orgx - 4, p, orgx, p ); // ( orgx, p, orgx+4, p);
 }
 }
 else
 {
 dc.DrawLine( orgx - 4, p, orgx + 4, p );

 m_pen.SetStyle( wxPENSTYLE_DOT );
 dc.SetPen( m_pen );

 dc.DrawLine( orgx - 4, p, endPx, p );

 m_pen.SetStyle( wxPENSTYLE_SOLID );
 dc.SetPen( m_pen );
 }

 // Print ticks labels
 }
 }

 for( n = 0; n < labelCount(); n++ )
 {
 double tp = getLabelPos( n );

 double py = TransformToPlot( tp ); // ( log10 ( tp ) - xlogmin) / (xlogmax - xlogmin);
 const int p = (int) ( ( w.GetPosY() - py ) * w.GetScaleY() );

 if( !m_tickLabels[n].visible )
 continue;

 if( (p >= minYpx) && (p <= maxYpx) )
 {
 s = getLabel( n );
 dc.GetTextExtent( s, &tx, &ty );

 if( (m_flags == mpALIGN_BORDER_LEFT) || (m_flags == mpALIGN_RIGHT) )
 dc.DrawText( s, orgx + 4, p - ty / 2 );
 else
 dc.DrawText( s, orgx - 4 - tx, p - ty / 2 ); // ( s, orgx+4, p-ty/2);
 }
 }

 // Draw axis name
 // Draw axis name

 dc.GetTextExtent( m_name, &tx, &ty );

 switch( m_nameFlags )
 {
 case mpALIGN_BORDER_LEFT:
 dc.DrawText( m_name, labelW + 8, 4 );
 break;

 case mpALIGN_LEFT:
 {
 // if ((!m_drawOutsideMargins) && (w.GetMarginLeft() > (ty + labelW + 8))) {
 // dc.DrawRotatedText( m_name, orgx - 6 - labelW - ty, (maxYpx + minYpx) / 2 + tx / 2, 90);
 // } else {
 dc.DrawText( m_name, orgx + 4, minYpx - ty - 4 );
 // }
 }
 break;

 case mpALIGN_CENTER:
 dc.DrawText( m_name, orgx + 4, 4 );
 break;

 case mpALIGN_RIGHT:
 {
 // dc.DrawRotatedText( m_name, orgx + 6, (maxYpx + minYpx) / 2 + tx / 2, 90);

 /*if ((!m_drawOutsideMargins) && (w.GetMarginRight() > (ty + labelW + 8))) {
 * dc.DrawRotatedText( m_name, orgx + 6 + labelW, (maxYpx - minYpx + tx)>>1, 90);
 * } else {*/
 dc.DrawText( m_name, orgx - tx - 4, minYpx - ty - 4 );
 // }
 }
 break;

 case mpALIGN_BORDER_RIGHT:
 dc.DrawText( m_name, orgx - 6 - tx - labelW, 4 );
 break;

 default:
 break;
 }
 }
}


// -----------------------------------------------------------------------------
// mpWindow
// -----------------------------------------------------------------------------

IMPLEMENT_DYNAMIC_CLASS( mpWindow, wxWindow )

BEGIN_EVENT_TABLE( mpWindow, wxWindow )
EVT_PAINT( mpWindow::OnPaint )
EVT_SIZE( mpWindow::OnSize )
EVT_SCROLLWIN_THUMBTRACK( mpWindow::OnScrollThumbTrack )
EVT_SCROLLWIN_PAGEUP( mpWindow::OnScrollPageUp )
EVT_SCROLLWIN_PAGEDOWN( mpWindow::OnScrollPageDown )
EVT_SCROLLWIN_LINEUP( mpWindow::OnScrollLineUp )
EVT_SCROLLWIN_LINEDOWN( mpWindow::OnScrollLineDown )
EVT_SCROLLWIN_TOP( mpWindow::OnScrollTop )
EVT_SCROLLWIN_BOTTOM( mpWindow::OnScrollBottom )

EVT_MIDDLE_DOWN( mpWindow::OnMouseMiddleDown ) // JLB
EVT_RIGHT_UP( mpWindow::OnShowPopupMenu )
EVT_MOUSEWHEEL( mpWindow::OnMouseWheel ) // JLB
#if wxCHECK_VERSION( 3, 1, 0 ) || defined( USE_OSX_MAGNIFY_EVENT )
EVT_MAGNIFY( mpWindow::OnMagnify )
#endif
EVT_MOTION( mpWindow::OnMouseMove ) // JLB
EVT_LEFT_DOWN( mpWindow::OnMouseLeftDown )
EVT_LEFT_UP( mpWindow::OnMouseLeftRelease )

EVT_MENU( mpID_CENTER, mpWindow::OnCenter )
EVT_MENU( mpID_FIT, mpWindow::OnFit )
EVT_MENU( mpID_ZOOM_IN, mpWindow::OnZoomIn )
EVT_MENU( mpID_ZOOM_OUT, mpWindow::OnZoomOut )
EVT_MENU( mpID_LOCKASPECT, mpWindow::OnLockAspect )
END_EVENT_TABLE()

mpWindow::mpWindow() : wxWindow(),
 m_lockaspect( false ),
 m_minX( 0.0 ),
 m_maxX( 0.0 ),
 m_minY( 0.0 ),
 m_maxY( 0.0 ),
 m_scaleX( 1.0 ),
 m_scaleY( 1.0 ),
 m_posX( 0.0 ),
 m_posY( 0.0 ),
 m_scrX( 64 ),
 m_scrY( 64 ),
 m_clickedX( 0 ),
 m_clickedY( 0 ),
 m_desiredXmin( 0.0 ),
 m_desiredXmax( 1.0 ),
 m_desiredYmin( 0.0 ),
 m_desiredYmax( 1.0 ),
 m_marginTop( 0 ),
 m_marginRight( 0 ),
 m_marginBottom( 0 ),
 m_marginLeft( 0 ),
 m_last_lx( 0 ),
 m_last_ly( 0 ),
 m_buff_bmp( nullptr ),
 m_enableDoubleBuffer( false ),
 m_enableMouseNavigation( true ),
 m_enableMouseWheelPan( false ),
 m_enableLimitedView( false ),
 m_enableScrollBars( false ),
  m_movingInfoLayer( nullptr ),
 m_zooming( false )
{
}

mpWindow::mpWindow( wxWindow* parent,
 wxWindowID id,
 const wxPoint& pos,
 const wxSize& size,
 long flag )
 : wxWindow( parent, id, pos, size, flag, wxT( "mathplot" ) )
{
 m_zooming = false;
 m_scaleX = m_scaleY = 1.0;
 m_posX = m_posY = 0;
 m_desiredXmin = m_desiredYmin = 0;
 m_desiredXmax = m_desiredYmax = 1;
 m_scrX = m_scrY = 64; // Fixed from m_scrX = m_scrX = 64;
 m_minX = m_minY = 0;
 m_maxX = m_maxY = 0;
 m_last_lx = m_last_ly = 0;
 m_buff_bmp = NULL;
 m_enableDoubleBuffer = false;
 m_enableMouseNavigation = true;
 m_enableLimitedView = false;
 m_movingInfoLayer = NULL;
 // Set margins to 0
 m_marginTop = 0; m_marginRight = 0; m_marginBottom = 0; m_marginLeft = 0;


 m_lockaspect = false;

 m_popmenu.Append( mpID_CENTER, _( "Center" ), _( "Center plot view to this position" ) );
 m_popmenu.Append( mpID_FIT, _( "Fit on Screen" ), _( "Set plot view to show all items" ) );
 m_popmenu.Append( mpID_ZOOM_IN, _( "Zoom In" ), _( "Zoom in plot view." ) );
 m_popmenu.Append( mpID_ZOOM_OUT, _( "Zoom Out" ), _( "Zoom out plot view." ) );
 // m_popmenu.AppendCheckItem( mpID_LOCKASPECT, _("Lock aspect"), _("Lock horizontal and vertical zoom aspect."));
 // m_popmenu.Append( mpID_HELP_MOUSE, _("Show mouse commands..."), _("Show help about the mouse commands."));

 m_layers.clear();
 SetBackgroundColour( *wxWHITE );
 m_bgColour = *wxWHITE;
 m_fgColour = *wxBLACK;

 m_enableScrollBars = false;
 SetSizeHints( 128, 128 );

 // J.L.Blanco: Eliminates the "flick" with the double buffer.
 SetBackgroundStyle( wxBG_STYLE_CUSTOM );

 UpdateAll();
}


mpWindow::~mpWindow()
{
 // Free all the layers:
 DelAllLayers( true, false );

 if( m_buff_bmp )
 {
 delete m_buff_bmp;
 m_buff_bmp = NULL;
 }
}


// Mouse handler, for detecting when the user drag with the right button or just "clicks" for the menu
// JLB
void mpWindow::OnMouseMiddleDown( wxMouseEvent& event )
{
 m_mouseMClick.x = event.GetX();
 m_mouseMClick.y = event.GetY();
}


#if wxCHECK_VERSION( 3, 1, 0 ) || defined( USE_OSX_MAGNIFY_EVENT )
void mpWindow::OnMagnify( wxMouseEvent& event )
{
 if( !m_enableMouseNavigation )
 {
 event.Skip();
 return;
 }

 float zoom = event.GetMagnification() + 1.0f;
 wxPoint pos( event.GetX(), event.GetY() );
 if( zoom > 1.0f )
 ZoomIn( pos, zoom );
 else if( zoom < 1.0f )
 ZoomOut( pos, 1.0f / zoom );
}
#endif


// Process mouse wheel events
// JLB
void mpWindow::OnMouseWheel( wxMouseEvent& event )
{
 if( !m_enableMouseNavigation )
 {
 event.Skip();
 return;
 }

 int change = event.GetWheelRotation();
 const int axis = event.GetWheelAxis();
 double changeUnitsX = change / m_scaleX;
 double changeUnitsY = change / m_scaleY;

 if( ( !m_enableMouseWheelPan && ( event.ControlDown() || event.ShiftDown() ) )
 || ( m_enableMouseWheelPan && !event.ControlDown() ) )
 {
 // Scrolling
 if( m_enableMouseWheelPan )
 {
 if( axis == wxMOUSE_WHEEL_HORIZONTAL || event.ShiftDown() )
 SetXView( m_posX + changeUnitsX, m_desiredXmax + changeUnitsX,
 m_desiredXmin + changeUnitsX );
 else
 SetYView( m_posY + changeUnitsY, m_desiredYmax + changeUnitsY,
 m_desiredYmin + changeUnitsY );
 }
 else
 {
 if( event.ControlDown() )
 SetXView( m_posX + changeUnitsX, m_desiredXmax + changeUnitsX,
 m_desiredXmin + changeUnitsX );
 else
 SetYView( m_posY + changeUnitsY, m_desiredYmax + changeUnitsY,
 m_desiredYmin + changeUnitsY );
 }

 UpdateAll();
 }
 else
 {
 // zoom in/out
 wxPoint clickPt( event.GetX(), event.GetY() );

 if( event.GetWheelRotation() > 0 )
 ZoomIn( clickPt );
 else
 ZoomOut( clickPt );

 return;
 }
}


// If the user "drags" with the right button pressed, do "pan"
// JLB
void mpWindow::OnMouseMove( wxMouseEvent& event )
{
 if( !m_enableMouseNavigation )
 {
 event.Skip();
 return;
 }

 if( event.m_middleDown )
 {
 // The change:
 int Ax = m_mouseMClick.x - event.GetX();
 int Ay = m_mouseMClick.y - event.GetY();

 // For the next event, use relative to this coordinates.
 m_mouseMClick.x = event.GetX();
 m_mouseMClick.y = event.GetY();

 double Ax_units = Ax / m_scaleX;
 double Ay_units = -Ay / m_scaleY;

 bool updateRequired = false;
 updateRequired |= SetXView( m_posX + Ax_units,
 m_desiredXmax + Ax_units,
 m_desiredXmin + Ax_units );
 updateRequired |= SetYView( m_posY + Ay_units,
 m_desiredYmax + Ay_units,
 m_desiredYmin + Ay_units );

 if( updateRequired )
 UpdateAll();
 }
 else
 {
 if( event.m_leftDown )
 {
 if( m_movingInfoLayer == NULL )
 {
 wxClientDC dc( this );
 wxPen pen( m_fgColour, 1, wxPENSTYLE_DOT );
 dc.SetPen( pen );
 dc.SetBrush( *wxTRANSPARENT_BRUSH );
 dc.DrawRectangle( m_mouseLClick.x, m_mouseLClick.y,
 event.GetX() - m_mouseLClick.x, event.GetY() - m_mouseLClick.y );
 m_zooming = true;
 m_zoomRect.x = m_mouseLClick.x;
 m_zoomRect.y = m_mouseLClick.y;
 m_zoomRect.width = event.GetX() - m_mouseLClick.x;
 m_zoomRect.height = event.GetY() - m_mouseLClick.y;
 }
 else
 {
 wxPoint moveVector( event.GetX() - m_mouseLClick.x, event.GetY() - m_mouseLClick.y );
 m_movingInfoLayer->Move( moveVector );
 m_zooming = false;
 }

 UpdateAll();
 }
 else
 {
#if 0
 wxLayerList::iterator li;

 for( li = m_layers.begin(); li != m_layers.end(); li++ )
 {
 if( (*li)->IsInfo() && (*li)->IsVisible() )
 {
 mpInfoLayer* tmpLyr = (mpInfoLayer*) (*li);
 tmpLyr->UpdateInfo( *this, event );
 // UpdateAll();
 RefreshRect( tmpLyr->GetRectangle() );
 }
 }

#endif
 /* if (m_coordTooltip) {
 * wxString toolTipContent;
 * toolTipContent.Printf( "X = %f\nY = %f", p2x(event.GetX()), p2y(event.GetY()));
 * wxTipWindow** ptr = NULL;
 * wxRect rectBounds(event.GetX(), event.GetY(), 5, 5);
 * wxTipWindow* tip = new wxTipWindow(this, toolTipContent, 100, ptr, &rectBounds);
 *
 * } */
 }
 }

 event.Skip();
}


void mpWindow::OnMouseLeftDown( wxMouseEvent& event )
{
 m_mouseLClick.x = event.GetX();
 m_mouseLClick.y = event.GetY();
 m_zooming = true;
 wxPoint pointClicked = event.GetPosition();
 m_movingInfoLayer = IsInsideInfoLayer( pointClicked );

 event.Skip();
}


void mpWindow::OnMouseLeftRelease( wxMouseEvent& event )
{
 wxPoint release( event.GetX(), event.GetY() );
 wxPoint press( m_mouseLClick.x, m_mouseLClick.y );

 m_zooming = false;

 if( m_movingInfoLayer != NULL )
 {
 m_movingInfoLayer->UpdateReference();
 m_movingInfoLayer = NULL;
 }
 else
 {
 if( release != press )
 ZoomRect( press, release );
 }

 event.Skip();
}


void mpWindow::Fit()
{
 if( UpdateBBox() )
 Fit( m_minX, m_maxX, m_minY, m_maxY );
}


// JL
void mpWindow::Fit( double xMin, double xMax, double yMin, double yMax,
 wxCoord* printSizeX, wxCoord* printSizeY )
{
 // Save desired borders:
 m_desiredXmin = xMin; m_desiredXmax = xMax;
 m_desiredYmin = yMin; m_desiredYmax = yMax;

 // Give a small margin to plot area
 double xExtra = fabs( xMax - xMin ) * 0.00;
 double yExtra = fabs( yMax - yMin ) * 0.03;

 xMin -= xExtra;
 xMax += xExtra;
 yMin -= yExtra;
 yMax += yExtra;

 if( printSizeX != NULL && printSizeY != NULL )
 {
 // Printer:
 m_scrX = *printSizeX;
 m_scrY = *printSizeY;
 }
 else
 {
 // Normal case (screen):
 GetClientSize( &m_scrX, &m_scrY );
 }

 double Ax, Ay;

 Ax = xMax - xMin;
 Ay = yMax - yMin;

 m_scaleX = (Ax != 0) ? (m_scrX - m_marginLeft - m_marginRight) / Ax : 1; // m_scaleX = (Ax != 0) ? m_scrX / Ax : 1;
 m_scaleY = (Ay != 0) ? (m_scrY - m_marginTop - m_marginBottom) / Ay : 1; // m_scaleY = (Ay != 0) ? m_scrY / Ay : 1;

 if( m_lockaspect )
 {
 // Keep the lowest "scale" to fit the whole range required by that axis (to actually
 // "fit"!):
 double s = m_scaleX < m_scaleY ? m_scaleX : m_scaleY;
 m_scaleX = s;
 m_scaleY = s;
 }

 // Adjusts corner coordinates: This should be simply:
 // m_posX = m_minX;
 // m_posY = m_maxY;
 // But account for centering if we have lock aspect:
 m_posX = (xMin + xMax) / 2 - ( (m_scrX - m_marginLeft - m_marginRight) / 2 + m_marginLeft ) /
 m_scaleX; // m_posX = (xMin+xMax)/2 - (m_scrX/2)/m_scaleX;
 // m_posY = (yMin+yMax)/2 + ((m_scrY - m_marginTop - m_marginBottom)/2 - m_marginTop)/m_scaleY; // m_posY = (yMin+yMax)/2 + (m_scrY/2)/m_scaleY;
 m_posY = (yMin + yMax) / 2 + ( (m_scrY - m_marginTop - m_marginBottom) / 2 + m_marginTop ) /
 m_scaleY; // m_posY = (yMin+yMax)/2 + (m_scrY/2)/m_scaleY;

 // It is VERY IMPORTANT to DO NOT call Refresh if we are drawing to the printer!!
 // Otherwise, the DC dimensions will be those of the window instead of the printer device
 if( printSizeX == NULL || printSizeY == NULL )
 UpdateAll();
}


// Patch ngpaton
void mpWindow::DoZoomInXCalc( const int staticXpixel )
{
 // Preserve the position of the clicked point:
 double staticX = p2x( staticXpixel );

 // Zoom in:
 m_scaleX = m_scaleX * zoomIncrementalFactor;
 // Adjust the new m_posx
 m_posX = staticX - (staticXpixel / m_scaleX);
 // Adjust desired
 m_desiredXmin = m_posX;
 m_desiredXmax = m_posX + ( m_scrX - (m_marginLeft + m_marginRight) ) / m_scaleX;
}


void mpWindow::AdjustLimitedView()
{
 if( !m_enableLimitedView )
 return;

 // m_min and m_max are plot limits for curves
 // xMin, xMax, yMin, yMax are the full limits (plot limit + margin)
 const double xMin = m_minX - m_marginLeft / m_scaleX;
 const double xMax = m_maxX + m_marginRight / m_scaleX;
 const double yMin = m_minY - m_marginTop / m_scaleY;
 const double yMax = m_maxY + m_marginBottom / m_scaleY;

 if( m_desiredXmin < xMin )
 {
 double diff = xMin - m_desiredXmin;
 m_posX += diff;
 m_desiredXmax += diff;
 m_desiredXmin = xMin;
 }

 if( m_desiredXmax > xMax )
 {
 double diff = m_desiredXmax - xMax;
 m_posX -= diff;
 m_desiredXmin -= diff;
 m_desiredXmax = xMax;
 }

 if( m_desiredYmin < yMin )
 {
 double diff = yMin - m_desiredYmin;
 m_posY += diff;
 m_desiredYmax += diff;
 m_desiredYmin = yMin;
 }

 if( m_desiredYmax > yMax )
 {
 double diff = m_desiredYmax - yMax;
 m_posY -= diff;
 m_desiredYmin -= diff;
 m_desiredYmax = yMax;
 }
}


bool mpWindow::SetXView( double pos, double desiredMax, double desiredMin )
{
 // if(!CheckXLimits(desiredMax, desiredMin))
 // return false;

 m_posX = pos;
 m_desiredXmax = desiredMax;
 m_desiredXmin = desiredMin;
 AdjustLimitedView();

 return true;
}


bool mpWindow::SetYView( double pos, double desiredMax, double desiredMin )
{
 // if(!CheckYLimits(desiredMax, desiredMin))
 // return false;

 m_posY = pos;
 m_desiredYmax = desiredMax;
 m_desiredYmin = desiredMin;
 AdjustLimitedView();

 return true;
}


void mpWindow::ZoomIn( const wxPoint& centerPoint )
{
 ZoomIn( centerPoint, zoomIncrementalFactor );
}


void mpWindow::ZoomIn( const wxPoint& centerPoint, double zoomFactor )
{
 wxPoint c( centerPoint );

 if( c == wxDefaultPosition )
 {
 GetClientSize( &m_scrX, &m_scrY );
 c.x = (m_scrX - m_marginLeft - m_marginRight) / 2 + m_marginLeft; // c.x = m_scrX/2;
 c.y = (m_scrY - m_marginTop - m_marginBottom) / 2 - m_marginTop; // c.y = m_scrY/2;
 }
 else
 {
 c.x = std::max( c.x, m_marginLeft );
 c.x = std::min( c.x, m_scrX - m_marginRight );
 c.y = std::max( c.y, m_marginTop );
 c.y = std::min( c.y, m_scrY - m_marginBottom );
 }

 // Preserve the position of the clicked point:
 double prior_layer_x = p2x( c.x );
 double prior_layer_y = p2y( c.y );

 // Zoom in:
 const double MAX_SCALE = 1e6;
 double newScaleX = m_scaleX * zoomFactor;
 double newScaleY = m_scaleY * zoomFactor;

 // Baaaaad things happen when you zoom in too much..
 if( newScaleX <= MAX_SCALE && newScaleY <= MAX_SCALE )
 {
 m_scaleX = newScaleX;
 m_scaleY = newScaleY;
 }
 else
 {
 return;
 }

 // Adjust the new m_posx/y:
 m_posX = prior_layer_x - c.x / m_scaleX;
 m_posY = prior_layer_y + c.y / m_scaleY;

 m_desiredXmin = m_posX;
 m_desiredXmax = m_posX + (m_scrX - m_marginLeft - m_marginRight) / m_scaleX; // m_desiredXmax = m_posX + m_scrX / m_scaleX;
 m_desiredYmax = m_posY;
 m_desiredYmin = m_posY - (m_scrY - m_marginTop - m_marginBottom) / m_scaleY; // m_desiredYmin = m_posY - m_scrY / m_scaleY;
 AdjustLimitedView();
 UpdateAll();
}


void mpWindow::ZoomOut( const wxPoint& centerPoint )
{
 ZoomOut( centerPoint, zoomIncrementalFactor );
}


void mpWindow::ZoomOut( const wxPoint& centerPoint, double zoomFactor )
{
 wxPoint c( centerPoint );

 if( c == wxDefaultPosition )
 {
 GetClientSize( &m_scrX, &m_scrY );
 c.x = (m_scrX - m_marginLeft - m_marginRight) / 2 + m_marginLeft; // c.x = m_scrX/2;
 c.y = (m_scrY - m_marginTop - m_marginBottom) / 2 - m_marginTop; // c.y = m_scrY/2;
 }

 // Preserve the position of the clicked point:
 double prior_layer_x = p2x( c.x );
 double prior_layer_y = p2y( c.y );

 // Zoom out:
 m_scaleX = m_scaleX / zoomFactor;
 m_scaleY = m_scaleY / zoomFactor;

 // Adjust the new m_posx/y:
 m_posX = prior_layer_x - c.x / m_scaleX;
 m_posY = prior_layer_y + c.y / m_scaleY;

 m_desiredXmin = m_posX;
 m_desiredXmax = m_posX + (m_scrX - m_marginLeft - m_marginRight) / m_scaleX; // m_desiredXmax = m_posX + m_scrX / m_scaleX;
 m_desiredYmax = m_posY;
 m_desiredYmin = m_posY - (m_scrY - m_marginTop - m_marginBottom) / m_scaleY; // m_desiredYmin = m_posY - m_scrY / m_scaleY;

 if( !CheckXLimits( m_desiredXmax,
 m_desiredXmin ) || !CheckYLimits( m_desiredYmax, m_desiredYmin ) )
 {
 Fit();
 }

 UpdateAll();
}


void mpWindow::ZoomInX()
{
 m_scaleX = m_scaleX * zoomIncrementalFactor;
 UpdateAll();
}


void mpWindow::ZoomRect( wxPoint p0, wxPoint p1 )
{
 // Compute the 2 corners in graph coordinates:
 double p0x = p2x( p0.x );
 double p0y = p2y( p0.y );
 double p1x = p2x( p1.x );
 double p1y = p2y( p1.y );

 // Order them:
 double zoom_x_min = p0x<p1x ? p0x : p1x;
 double zoom_x_max = p0x>p1x ? p0x : p1x;
 double zoom_y_min = p0y<p1y ? p0y : p1y;
 double zoom_y_max = p0y>p1y ? p0y : p1y;

 Fit( zoom_x_min, zoom_x_max, zoom_y_min, zoom_y_max );
 AdjustLimitedView();
}


void mpWindow::LockAspect( bool enable )
{
 m_lockaspect = enable;
 m_popmenu.Check( mpID_LOCKASPECT, enable );

 // Try to fit again with the new config:
 Fit( m_desiredXmin, m_desiredXmax, m_desiredYmin, m_desiredYmax );
}


void mpWindow::OnShowPopupMenu( wxMouseEvent& event )
{
 m_clickedX = event.GetX();
 m_clickedY = event.GetY();
 PopupMenu( &m_popmenu, event.GetX(), event.GetY() );
}


void mpWindow::OnLockAspect( wxCommandEvent& WXUNUSED( event ) )
{
 LockAspect( !m_lockaspect );
}


void mpWindow::OnFit( wxCommandEvent& WXUNUSED( event ) )
{
 Fit();
}


void mpWindow::OnCenter( wxCommandEvent& WXUNUSED( event ) )
{
 GetClientSize( &m_scrX, &m_scrY );
 int centerX = (m_scrX - m_marginLeft - m_marginRight) / 2; // + m_marginLeft; // c.x = m_scrX/2;
 int centerY = (m_scrY - m_marginTop - m_marginBottom) / 2; // - m_marginTop; // c.y = m_scrY/2;
 SetPos( p2x( m_clickedX - centerX ), p2y( m_clickedY - centerY ) );
 // SetPos( p2x(m_clickedX-m_scrX/2), p2y(m_clickedY-m_scrY/2) ); //SetPos( (double)(m_clickedX-m_scrX/2) / m_scaleX + m_posX, (double)(m_scrY/2-m_clickedY) / m_scaleY + m_posY);
}


void mpWindow::OnZoomIn( wxCommandEvent& WXUNUSED( event ) )
{
 ZoomIn( wxPoint( m_mouseMClick.x, m_mouseMClick.y ) );
}


void mpWindow::OnZoomOut( wxCommandEvent& WXUNUSED( event ) )
{
 ZoomOut();
}


void mpWindow::OnSize( wxSizeEvent& WXUNUSED( event ) )
{
 // Try to fit again with the new window size:
 Fit( m_desiredXmin, m_desiredXmax, m_desiredYmin, m_desiredYmax );
}


bool mpWindow::AddLayer( mpLayer* layer, bool refreshDisplay )
{
 if( layer != NULL )
 {
 m_layers.push_back( layer );

 if( refreshDisplay )
 UpdateAll();

 return true;
 }

 ;
 return false;
}


bool mpWindow::DelLayer( mpLayer* layer,
 bool alsoDeleteObject,
 bool refreshDisplay )
{
 wxLayerList::iterator layIt;

 for( layIt = m_layers.begin(); layIt != m_layers.end(); layIt++ )
 {
 if( *layIt == layer )
 {
 // Also delete the object?
 if( alsoDeleteObject )
 delete *layIt;

 m_layers.erase( layIt ); // this deleted the reference only

 if( refreshDisplay )
 UpdateAll();

 return true;
 }
 }

 return false;
}


void mpWindow::DelAllLayers( bool alsoDeleteObject, bool refreshDisplay )
{
 while( m_layers.size()>0 )
 {
 // Also delete the object?
 if( alsoDeleteObject )
 delete m_layers[0];

 m_layers.erase( m_layers.begin() ); // this deleted the reference only
 }

 if( refreshDisplay )
 UpdateAll();
}


void mpWindow::OnPaint( wxPaintEvent& WXUNUSED( event ) )
{
 wxPaintDC dc( this );

 dc.GetSize( &m_scrX, &m_scrY ); // This is the size of the visible area only!

 // Selects direct or buffered draw:
 wxDC* trgDc;

 // J.L.Blanco @ Aug 2007: Added double buffer support
 if( m_enableDoubleBuffer )
 {
 if( m_last_lx != m_scrX || m_last_ly != m_scrY )
 {
 if( m_buff_bmp )
 delete m_buff_bmp;

 m_buff_bmp = new wxBitmap( m_scrX, m_scrY );
 m_buff_dc.SelectObject( *m_buff_bmp );
 m_last_lx = m_scrX;
 m_last_ly = m_scrY;
 }

 trgDc = &m_buff_dc;
 }
 else
 {
 trgDc = &dc;
 }

 // Draw background:
 // trgDc->SetDeviceOrigin(0,0);
 trgDc->SetPen( *wxTRANSPARENT_PEN );
 wxBrush brush( GetBackgroundColour() );
 trgDc->SetBrush( brush );
 trgDc->SetTextForeground( m_fgColour );
 trgDc->DrawRectangle( 0, 0, m_scrX, m_scrY );

 // Draw all the layers:
 // trgDc->SetDeviceOrigin( m_scrX>>1, m_scrY>>1); // Origin at the center
 wxLayerList::iterator li;

 for( li = m_layers.begin(); li != m_layers.end(); li++ )
 (*li)->Plot( *trgDc, *this );

 if( m_zooming )
 {
 wxPen pen( m_fgColour, 1, wxPENSTYLE_DOT );
 trgDc->SetPen( pen );
 trgDc->SetBrush( *wxTRANSPARENT_BRUSH );
 trgDc->DrawRectangle( m_zoomRect );
 }

 // If doublebuffer, draw now to the window:
 if( m_enableDoubleBuffer )
 {
 // trgDc->SetDeviceOrigin(0,0);
 // dc.SetDeviceOrigin(0,0); // Origin at the center
 dc.Blit( 0, 0, m_scrX, m_scrY, trgDc, 0, 0 );
 }

 // If scrollbars are enabled, refresh them
 if( m_enableScrollBars )
 {
 /* m_scroll.x = (int) floor((m_posX - m_minX)*m_scaleX);
 * m_scroll.y = (int) floor((m_maxY - m_posY )*m_scaleY);
 * Scroll(m_scroll.x, m_scroll.y);*/
 // Scroll(x2p(m_posX), y2p(m_posY));
 // SetVirtualSize((int) ((m_maxX - m_minX)*m_scaleX), (int) ((m_maxY - m_minY)*m_scaleY));
 // int centerX = (m_scrX - m_marginLeft - m_marginRight)/2; // + m_marginLeft; // c.x = m_scrX/2;
 // int centerY = (m_scrY - m_marginTop - m_marginBottom)/2; // - m_marginTop; // c.y = m_scrY/2;
 /*SetScrollbars(1, 1, (int) ((m_maxX - m_minX)*m_scaleX), (int) ((m_maxY - m_minY)*m_scaleY));*/ // , x2p(m_posX + centerX/m_scaleX), y2p(m_posY - centerY/m_scaleY), true);
 }
}


bool mpWindow::UpdateBBox()
{
 m_minX = 0.0;
 m_maxX = 1.0;
 m_minY = 0.0;
 m_maxY = 1.0;

 return true;
}


void mpWindow::UpdateAll()
{
 if( UpdateBBox() )
 {
 if( m_enableScrollBars )
 {
 int cx, cy;
 GetClientSize( &cx, &cy );
 // Do x scroll bar
 {
 // Convert margin sizes from pixels to coordinates
 double leftMargin = m_marginLeft / m_scaleX;
 // Calculate the range in coords that we want to scroll over
  double maxX = (m_desiredXmax > m_maxX) ? m_desiredXmax : m_maxX;
 double minX = (m_desiredXmin < m_minX) ? m_desiredXmin : m_minX;

 if( (m_posX + leftMargin) < minX )
 minX = m_posX + leftMargin;

 // Calculate scroll bar size and thumb position
 int sizeX = (int) ( (maxX - minX) * m_scaleX );
 int thumbX = (int) ( ( (m_posX + leftMargin) - minX ) * m_scaleX );
 SetScrollbar( wxHORIZONTAL, thumbX, cx - (m_marginRight + m_marginLeft), sizeX );
 }
 // Do y scroll bar
 {
 // Convert margin sizes from pixels to coordinates
 double topMargin = m_marginTop / m_scaleY;
 // Calculate the range in coords that we want to scroll over
 double maxY = (m_desiredYmax > m_maxY) ? m_desiredYmax : m_maxY;

 if( (m_posY - topMargin) > maxY )
 maxY = m_posY - topMargin;

 double minY = (m_desiredYmin < m_minY) ? m_desiredYmin : m_minY;
 // Calculate scroll bar size and thumb position
 int sizeY = (int) ( (maxY - minY) * m_scaleY );
 int thumbY = (int) ( ( maxY - (m_posY - topMargin) ) * m_scaleY );
 SetScrollbar( wxVERTICAL, thumbY, cy - (m_marginTop + m_marginBottom), sizeY );
 }
 }
 }

 Refresh( false );
}


void mpWindow::DoScrollCalc( const int position, const int orientation )
{
 if( orientation == wxVERTICAL )
 {
 // Y axis
 // Get top margin in coord units
 double topMargin = m_marginTop / m_scaleY;
 // Calculate maximum Y coord to be shown in the graph
 double maxY = m_desiredYmax > m_maxY ? m_desiredYmax : m_maxY;
 // Set new position
 SetPosY( ( maxY - (position / m_scaleY) ) + topMargin );
 }
 else
 {
 // X Axis
 // Get left margin in coord units
 double leftMargin = m_marginLeft / m_scaleX;
 // Calculate minimum X coord to be shown in the graph
 double minX = (m_desiredXmin < m_minX) ? m_desiredXmin : m_minX;
 // Set new position
 SetPosX( ( minX + (position / m_scaleX) ) - leftMargin );
 }
}


void mpWindow::OnScrollThumbTrack( wxScrollWinEvent& event )
{
 DoScrollCalc( event.GetPosition(), event.GetOrientation() );
}


void mpWindow::OnScrollPageUp( wxScrollWinEvent& event )
{
 int scrollOrientation = event.GetOrientation();
 // Get position before page up
 int position = GetScrollPos( scrollOrientation );
 // Get thumb size
 int thumbSize = GetScrollThumb( scrollOrientation );

 // Need to adjust position by a page
 position -= thumbSize;

 if( position < 0 )
 position = 0;

 DoScrollCalc( position, scrollOrientation );
}


void mpWindow::OnScrollPageDown( wxScrollWinEvent& event )
{
 int scrollOrientation = event.GetOrientation();
 // Get position before page up
 int position = GetScrollPos( scrollOrientation );
 // Get thumb size
 int thumbSize = GetScrollThumb( scrollOrientation );
 // Get scroll range
 int scrollRange = GetScrollRange( scrollOrientation );

 // Need to adjust position by a page
 position += thumbSize;

 if( position > (scrollRange - thumbSize) )
 position = scrollRange - thumbSize;

 DoScrollCalc( position, scrollOrientation );
}


void mpWindow::OnScrollLineUp( wxScrollWinEvent& event )
{
 int scrollOrientation = event.GetOrientation();
 // Get position before page up
 int position = GetScrollPos( scrollOrientation );

 // Need to adjust position by a line
 position -= mpSCROLL_NUM_PIXELS_PER_LINE;

 if( position < 0 )
 position = 0;

 DoScrollCalc( position, scrollOrientation );
}


void mpWindow::OnScrollLineDown( wxScrollWinEvent& event )
{
 int scrollOrientation = event.GetOrientation();
 // Get position before page up
 int position = GetScrollPos( scrollOrientation );
 // Get thumb size
 int thumbSize = GetScrollThumb( scrollOrientation );
 // Get scroll range
 int scrollRange = GetScrollRange( scrollOrientation );

 // Need to adjust position by a page
 position += mpSCROLL_NUM_PIXELS_PER_LINE;

 if( position > (scrollRange - thumbSize) )
 position = scrollRange - thumbSize;

 DoScrollCalc( position, scrollOrientation );
}


void mpWindow::OnScrollTop( wxScrollWinEvent& event )
{
 DoScrollCalc( 0, event.GetOrientation() );
}


void mpWindow::OnScrollBottom( wxScrollWinEvent& event )
{
 int scrollOrientation = event.GetOrientation();
 // Get thumb size
 int thumbSize = GetScrollThumb( scrollOrientation );
 // Get scroll range
 int scrollRange = GetScrollRange( scrollOrientation );

 DoScrollCalc( scrollRange - thumbSize, scrollOrientation );
}


// End patch ngpaton

void mpWindow::SetScaleX( double scaleX )
{
 if( scaleX != 0 )
 m_scaleX = scaleX;

 UpdateAll();
}


// New methods implemented by Davide Rondini

unsigned int mpWindow::CountLayers() const
{
 unsigned int layerNo = 0;

 for( const mpLayer* layer : m_layers )
 {
 if( layer->HasBBox() )
 layerNo++;
 }

 return layerNo;
}


mpLayer* mpWindow::GetLayer( int position ) const
{
 if( ( position >= (int) m_layers.size() ) || position < 0 )
 return NULL;

 return m_layers[position];
}


const mpLayer* mpWindow::GetLayerByName( const wxString& name ) const
{
 for( const mpLayer* layer : m_layers )
 {
 if( !layer->GetName().Cmp( name ) )
 return layer;
 }

 return NULL; // Not found
}


void mpWindow::GetBoundingBox( double* bbox ) const
{
 bbox[0] = m_minX;
 bbox[1] = m_maxX;
 bbox[2] = m_minY;
 bbox[3] = m_maxY;
}


bool mpWindow::SaveScreenshot( const wxString& filename, wxBitmapType type, wxSize imageSize,
 bool fit )
{
 int sizeX, sizeY;
 int bk_scrX, bk_scrY;

 if( imageSize == wxDefaultSize )
 {
 sizeX = m_scrX;
 sizeY = m_scrY;
 }
 else
 {
 sizeX = imageSize.x;
 sizeY = imageSize.y;
 bk_scrX = m_scrX;
 bk_scrY = m_scrY;
 SetScr( sizeX, sizeY );
 }

 wxBitmap screenBuffer( sizeX, sizeY );
 wxMemoryDC screenDC;
 screenDC.SelectObject( screenBuffer );
 screenDC.SetPen( *wxWHITE_PEN );
 screenDC.SetTextForeground( m_fgColour );
 wxBrush brush( GetBackgroundColour() );
 screenDC.SetBrush( brush );
 screenDC.DrawRectangle( 0, 0, sizeX, sizeY );

 if( fit )
 Fit( m_minX, m_maxX, m_minY, m_maxY, &sizeX, &sizeY );
 else
 Fit( m_desiredXmin, m_desiredXmax, m_desiredYmin, m_desiredYmax, &sizeX, &sizeY );

 // Draw all the layers:
 for( mpLayer* layer : m_layers )
 layer->Plot( screenDC, *this );

 if( imageSize != wxDefaultSize )
 {
 // Restore dimensions
 SetScr( bk_scrX, bk_scrY );
 Fit( m_desiredXmin, m_desiredXmax, m_desiredYmin, m_desiredYmax, &bk_scrX, &bk_scrY );
 UpdateAll();
 }

 // Once drawing is complete, actually save screen shot
 wxImage screenImage = screenBuffer.ConvertToImage();
 return screenImage.SaveFile( filename, type );
}


void mpWindow::SetMargins( int top, int right, int bottom, int left )
{
 m_marginTop = top;
 m_marginRight = right;
 m_marginBottom = bottom;
 m_marginLeft = left;
}


mpInfoLayer* mpWindow::IsInsideInfoLayer( wxPoint& point )
{
 for( mpLayer* layer : m_layers )
 {
 if( layer->IsInfo() )
 {
 mpInfoLayer* tmpLyr = static_cast<mpInfoLayer*>( layer );

 if( tmpLyr->Inside( point ) )
 return tmpLyr;
 }
 }

 return NULL;
}


void mpWindow::SetLayerVisible( const wxString& name, bool viewable )
{
 mpLayer* lx = GetLayerByName( name );

 if( lx )
 {
 lx->SetVisible( viewable );
 UpdateAll();
 }
}


bool mpWindow::IsLayerVisible( const wxString& name ) const
{
 const mpLayer* lx = GetLayerByName( name );

 return lx ? lx->IsVisible() : false;
}


void mpWindow::SetLayerVisible( const unsigned int position, bool viewable )
{
 mpLayer* lx = GetLayer( position );

 if( lx )
 {
 lx->SetVisible( viewable );
 UpdateAll();
 }
}


bool mpWindow::IsLayerVisible( unsigned int position ) const
{
 mpLayer* lx = GetLayer( position );

 return (lx) ? lx->IsVisible() : false;
}


void mpWindow::SetColourTheme( const wxColour& bgColour, const wxColour& drawColour,
 const wxColour& axesColour )
{
 SetBackgroundColour( bgColour );
 SetForegroundColour( drawColour );
 m_bgColour = bgColour;
 m_fgColour = drawColour;
 m_axColour = axesColour;

 // Cycle between layers to set colours and properties to them
 for( mpLayer* layer : m_layers )
 {
 if( layer->GetLayerType() == mpLAYER_AXIS )
 {
 wxPen axisPen = layer->GetPen(); // Get the old pen to modify only colour, not style or width
 axisPen.SetColour( axesColour );
 layer->SetPen( axisPen );
 }

 if( layer->GetLayerType() == mpLAYER_INFO )
 {
 wxPen infoPen = layer->GetPen(); // Get the old pen to modify only colour, not style or width
 infoPen.SetColour( drawColour );
 layer->SetPen( infoPen );
 }
 }
}


// -----------------------------------------------------------------------------
// mpFXYVector implementation - by Jose Luis Blanco (AGO-2007)
// -----------------------------------------------------------------------------

IMPLEMENT_DYNAMIC_CLASS( mpFXYVector, mpFXY )

// Constructor
mpFXYVector::mpFXYVector( const wxString& name, int flags ) : mpFXY( name, flags )
{
 m_index = 0;
 m_minX = -1;
 m_maxX = 1;
 m_minY = -1;
 m_maxY = 1;
 m_type = mpLAYER_PLOT;
}


double mpScaleX::TransformToPlot( double x ) const
{
 return (x + m_offset) * m_scale;
}


double mpScaleX::TransformFromPlot( double xplot ) const
{
 return xplot / m_scale - m_offset;
}


double mpScaleY::TransformToPlot( double x ) const
{
 return (x + m_offset) * m_scale;
}


double mpScaleY::TransformFromPlot( double xplot ) const
{
 return xplot / m_scale - m_offset;
}


double mpScaleXLog::TransformToPlot( double x ) const
{
 double xlogmin = log10( m_minV );
 double xlogmax = log10( m_maxV );

 return ( log10( x ) - xlogmin) / (xlogmax - xlogmin);
}


double mpScaleXLog::TransformFromPlot( double xplot ) const
{
 double xlogmin = log10( m_minV );
 double xlogmax = log10( m_maxV );

 return pow( 10.0, xplot * (xlogmax - xlogmin) + xlogmin );
}


#if 0
mpFSemiLogXVector::mpFSemiLogXVector( wxString name, int flags ) :
 mpFXYVector( name, flags )
{
}


IMPLEMENT_DYNAMIC_CLASS( mpFSemiLogXVector, mpFXYVector )
#endif // 0

void mpFXYVector::Rewind()
{
 m_index = 0;
}

size_t mpFXYVector::GetCount() const
{
 return m_xs.size();
}


bool mpFXYVector::GetNextXY( double& x, double& y )
{
 if( m_index >= m_xs.size() )
 {
 return false;
 }
 else
 {
 x = m_xs[m_index];
 y = m_ys[m_index++];
 return m_index <= m_xs.size();
 }
}


void mpFXYVector::Clear()
{
 m_xs.clear();
 m_ys.clear();
}


void mpFXYVector::SetData( const std::vector<double>& xs, const std::vector<double>& ys )
{
 // Check if the data vectors are of the same size
 if( xs.size() != ys.size() )
 return;

 // Copy the data:
 m_xs = xs;
 m_ys = ys;

 // Update internal variables for the bounding box.
 if( xs.size() > 0 )
 {
 m_minX = xs[0];
 m_maxX = xs[0];
 m_minY = ys[0];
 m_maxY = ys[0];

  for( const double x : xs )
 {
 if( x < m_minX )
 m_minX = x;

 if( x > m_maxX )
 m_maxX = x;
 }

 for( const double y : ys )
 {
 if( y < m_minY )
 m_minY = y;

 if( y > m_maxY )
 m_maxY = y;
 }
 }
 else
 {
 m_minX = -1;
 m_maxX = 1;
 m_minY = -1;
 m_maxY = 1;
 }
}


// -----------------------------------------------------------------------------
// mpText - provided by Val Greene
// -----------------------------------------------------------------------------

IMPLEMENT_DYNAMIC_CLASS( mpText, mpLayer )



mpText::mpText( const wxString& name, int offsetx, int offsety )
{
 SetName( name );

 if( offsetx >= 0 && offsetx <= 100 )
 m_offsetx = offsetx;
 else
 m_offsetx = 5;

 if( offsety >= 0 && offsety <= 100 )
 m_offsety = offsety;
 else
 m_offsety = 50;

 m_type = mpLAYER_INFO;
}


void mpText::Plot( wxDC& dc, mpWindow& w )
{
 if( m_visible )
 {
 dc.SetPen( m_pen );
 dc.SetFont( m_font );

 wxCoord tw = 0, th = 0;
 dc.GetTextExtent( GetName(), &tw, &th );

 // int left = -dc.LogicalToDeviceX(0);
 // int width = dc.LogicalToDeviceX(0) - left;
 // int bottom = dc.LogicalToDeviceY(0);
 // int height = bottom - -dc.LogicalToDeviceY(0);

 /* dc.DrawText( GetName(),
 * (int)((((float)width/100.0) * m_offsety) + left - (tw/2)),
 * (int)((((float)height/100.0) * m_offsetx) - bottom) );*/
 int px = m_offsetx * ( w.GetScrX() - w.GetMarginLeft() - w.GetMarginRight() ) / 100;
 int py = m_offsety * ( w.GetScrY() - w.GetMarginTop() - w.GetMarginBottom() ) / 100;
 dc.DrawText( GetName(), px, py );
 }
}


// -----------------------------------------------------------------------------
// mpPrintout - provided by Davide Rondini
// -----------------------------------------------------------------------------

mpPrintout::mpPrintout( mpWindow* drawWindow, const wxChar* title ) : wxPrintout( title )
{
 drawn = false;
 plotWindow = drawWindow;
}


bool mpPrintout::OnPrintPage( int page )
{
 wxDC* trgDc = GetDC();

 if( (trgDc) && (page == 1) )
 {
 wxCoord m_prnX, m_prnY;
 int marginX = 50;
 int marginY = 50;
 trgDc->GetSize( &m_prnX, &m_prnY );

 m_prnX -= (2 * marginX);
 m_prnY -= (2 * marginY);
 trgDc->SetDeviceOrigin( marginX, marginY );

 // Set the scale according to the page:
 plotWindow->Fit(
 plotWindow->GetDesiredXmin(),
 plotWindow->GetDesiredXmax(),
 plotWindow->GetDesiredYmin(),
 plotWindow->GetDesiredYmax(),
 &m_prnX,
 &m_prnY );

 // Get the colours of the plotWindow to restore them ath the end
 wxColour oldBgColour = plotWindow->GetBackgroundColour();
 wxColour oldFgColour = plotWindow->GetForegroundColour();
 wxColour oldAxColour = plotWindow->GetAxesColour();

 // Draw background, ensuring to use white background for printing.
 trgDc->SetPen( *wxTRANSPARENT_PEN );
 // wxBrush brush( plotWindow->GetBackgroundColour() );
 wxBrush brush = *wxWHITE_BRUSH;
 trgDc->SetBrush( brush );
 trgDc->DrawRectangle( 0, 0, m_prnX, m_prnY );

 // Draw all the layers:
 // trgDc->SetDeviceOrigin( m_prnX>>1, m_prnY>>1); // Origin at the center
 mpLayer* layer;

 for( unsigned int li = 0; li < plotWindow->CountAllLayers(); li++ )
 {
 layer = plotWindow->GetLayer( li );
 layer->Plot( *trgDc, *plotWindow );
 }

 ;
 // Restore device origin
 // trgDc->SetDeviceOrigin(0, 0);
 // Restore colours
 plotWindow->SetColourTheme( oldBgColour, oldFgColour, oldAxColour );
 // Restore drawing
 plotWindow->Fit( plotWindow->GetDesiredXmin(),
 plotWindow->GetDesiredXmax(), plotWindow->GetDesiredYmin(),
 plotWindow->GetDesiredYmax(), NULL, NULL );
 plotWindow->UpdateAll();
 }

 return true;
}


bool mpPrintout::HasPage( int page )
{
 return page == 1;
}


// -----------------------------------------------------------------------------
// mpMovableObject - provided by Jose Luis Blanco
// -----------------------------------------------------------------------------
void mpMovableObject::TranslatePoint( double x, double y, double& out_x, double& out_y )
{
 double ccos = cos( m_reference_phi ); // Avoid computing cos/sin twice.
 double csin = sin( m_reference_phi );

 out_x = m_reference_x + ccos * x - csin * y;
 out_y = m_reference_y + csin * x + ccos * y;
}


// This method updates the buffers m_trans_shape_xs/ys, and the precomputed bounding box.
void mpMovableObject::ShapeUpdated()
{
 // Just in case...
 if( m_shape_xs.size() != m_shape_ys.size() )
 {
 }
 else
 {
 double ccos = cos( m_reference_phi ); // Avoid computing cos/sin twice.
 double csin = sin( m_reference_phi );

 m_trans_shape_xs.resize( m_shape_xs.size() );
 m_trans_shape_ys.resize( m_shape_xs.size() );

 std::vector<double>::iterator itXi, itXo;
 std::vector<double>::iterator itYi, itYo;

 m_bbox_min_x = 1e300;
 m_bbox_max_x = -1e300;
 m_bbox_min_y = 1e300;
 m_bbox_max_y = -1e300;

 for( itXo = m_trans_shape_xs.begin(),
 itYo = m_trans_shape_ys.begin(), itXi = m_shape_xs.begin(), itYi = m_shape_ys.begin();
 itXo!=m_trans_shape_xs.end(); itXo++, itYo++, itXi++, itYi++ )
 {
 *itXo = m_reference_x + ccos * (*itXi) - csin * (*itYi);
 *itYo = m_reference_y + csin * (*itXi) + ccos * (*itYi);

 // Keep BBox:
 if( *itXo < m_bbox_min_x )
 m_bbox_min_x = *itXo;

 if( *itXo > m_bbox_max_x )
 m_bbox_max_x = *itXo;

 if( *itYo < m_bbox_min_y )
 m_bbox_min_y = *itYo;

 if( *itYo > m_bbox_max_y )
 m_bbox_max_y = *itYo;
 }
 }
}


void mpMovableObject::Plot( wxDC& dc, mpWindow& w )
{
 if( m_visible )
 {
 dc.SetPen( m_pen );


 std::vector<double>::iterator itX = m_trans_shape_xs.begin();
 std::vector<double>::iterator itY = m_trans_shape_ys.begin();

 if( !m_continuous )
 {
 // for some reason DrawPoint does not use the current pen,
 // so we use DrawLine for fat pens
 if( m_pen.GetWidth() <= 1 )
 {
 while( itX!=m_trans_shape_xs.end() )
 {
 dc.DrawPoint( w.x2p( *(itX++) ), w.y2p( *(itY++) ) );
 }
 }
 else
 {
 while( itX!=m_trans_shape_xs.end() )
 {
 wxCoord cx = w.x2p( *(itX++) );
  wxCoord cy = w.y2p( *(itY++) );
 dc.DrawLine( cx, cy, cx, cy );
 }
 }
 }
 else
 {
 wxCoord cx0 = 0, cy0 = 0;
 bool first = true;

 while( itX != m_trans_shape_xs.end() )
 {
 wxCoord cx = w.x2p( *(itX++) );
 wxCoord cy = w.y2p( *(itY++) );

 if( first )
 {
 first = false;
 cx0 = cx; cy0 = cy;
 }

 dc.DrawLine( cx0, cy0, cx, cy );
 cx0 = cx; cy0 = cy;
 }
 }

 if( !m_name.IsEmpty() && m_showName )
 {
 dc.SetFont( m_font );

 wxCoord tx, ty;
 dc.GetTextExtent( m_name, &tx, &ty );

 if( HasBBox() )
 {
 wxCoord sx = (wxCoord) ( ( m_bbox_max_x - w.GetPosX() ) * w.GetScaleX() );
 wxCoord sy = (wxCoord) ( (w.GetPosY() - m_bbox_max_y ) * w.GetScaleY() );

 tx = sx - tx - 8;
 ty = sy - 8 - ty;
 }
 else
 {
 const int sx = w.GetScrX() >> 1;
 const int sy = w.GetScrY() >> 1;

 if( (m_flags & mpALIGNMASK) == mpALIGN_NE )
 {
 tx = sx - tx - 8;
 ty = -sy + 8;
 }
 else if( (m_flags & mpALIGNMASK) == mpALIGN_NW )
 {
 tx = -sx + 8;
 ty = -sy + 8;
 }
 else if( (m_flags & mpALIGNMASK) == mpALIGN_SW )
 {
 tx = -sx + 8;
 ty = sy - 8 - ty;
 }
 else
 {
 tx = sx - tx - 8;
 ty = sy - 8 - ty;
 }
 }

 dc.DrawText( m_name, tx, ty );
 }
 }
}


// -----------------------------------------------------------------------------
// mpCovarianceEllipse - provided by Jose Luis Blanco
// -----------------------------------------------------------------------------

// Called to update the m_shape_xs, m_shape_ys vectors, whenever a parameter changes.
void mpCovarianceEllipse::RecalculateShape()
{
 m_shape_xs.clear();
 m_shape_ys.clear();

 // Preliminary checks:
 if( m_quantiles < 0 )
 return;

 if( m_cov_00 < 0 )
 return;

 if( m_cov_11 < 0 )
 return;

 m_shape_xs.resize( m_segments, 0 );
 m_shape_ys.resize( m_segments, 0 );

 // Compute the two eigenvalues of the covariance:
 // -------------------------------------------------
 double b = -m_cov_00 - m_cov_11;
 double c = m_cov_00 * m_cov_11 - m_cov_01 * m_cov_01;

 double D = b * b - 4 * c;

 if( D < 0 )
 return;

 double eigenVal0 = 0.5 * ( -b + sqrt( D ) );
 double eigenVal1 = 0.5 * ( -b - sqrt( D ) );

 // Compute the two corresponding eigenvectors:
 // -------------------------------------------------
 double eigenVec0_x, eigenVec0_y;
 double eigenVec1_x, eigenVec1_y;

 if( fabs( eigenVal0 - m_cov_00 ) > 1e-6 )
 {
 double k1x = m_cov_01 / ( eigenVal0 - m_cov_00 );
 eigenVec0_y = 1;
 eigenVec0_x = eigenVec0_y * k1x;
 }
 else
 {
 double k1y = m_cov_01 / ( eigenVal0 - m_cov_11 );
 eigenVec0_x = 1;
 eigenVec0_y = eigenVec0_x * k1y;
 }

 if( fabs( eigenVal1 - m_cov_00 ) > 1e-6 )
 {
 double k2x = m_cov_01 / ( eigenVal1 - m_cov_00 );
 eigenVec1_y = 1;
 eigenVec1_x = eigenVec1_y * k2x;
 }
 else
 {
 double k2y = m_cov_01 / ( eigenVal1 - m_cov_11 );
 eigenVec1_x = 1;
 eigenVec1_y = eigenVec1_x * k2y;
 }

 // Normalize the eigenvectors:
 double len = sqrt( eigenVec0_x * eigenVec0_x + eigenVec0_y * eigenVec0_y );
 eigenVec0_x /= len; // It *CANNOT* be zero
 eigenVec0_y /= len;

 len = sqrt( eigenVec1_x * eigenVec1_x + eigenVec1_y * eigenVec1_y );
 eigenVec1_x /= len; // It *CANNOT* be zero
 eigenVec1_y /= len;


 // Take the sqrt of the eigenvalues (required for the ellipse scale):
 eigenVal0 = sqrt( eigenVal0 );
 eigenVal1 = sqrt( eigenVal1 );

 // Compute the 2x2 matrix M = diag(eigVal) * (~eigVec) (each eigen vector is a row):
 double M_00 = eigenVec0_x * eigenVal0;
 double M_01 = eigenVec0_y * eigenVal0;

 double M_10 = eigenVec1_x * eigenVal1;
 double M_11 = eigenVec1_y * eigenVal1;

 // The points of the 2D ellipse:
 double ang;
 double Aang = 6.283185308 / (m_segments - 1);
 int i;

 for( i = 0, ang = 0; i < m_segments; i++, ang += Aang )
 {
 double ccos = cos( ang );
 double csin = sin( ang );

 m_shape_xs[i] = m_quantiles * (ccos * M_00 + csin * M_10 );
 m_shape_ys[i] = m_quantiles * (ccos * M_01 + csin * M_11 );
 } // end for points on ellipse

 ShapeUpdated();
}


// -----------------------------------------------------------------------------
// mpPolygon - provided by Jose Luis Blanco
// -----------------------------------------------------------------------------
void mpPolygon::setPoints( const std::vector<double>& points_xs,
 const std::vector<double>& points_ys,
 bool closedShape )
{
 if( points_xs.size() == points_ys.size() )
 {
 m_shape_xs = points_xs;
 m_shape_ys = points_ys;

 if( closedShape && !points_xs.empty() )
 {
 m_shape_xs.push_back( points_xs[0] );
 m_shape_ys.push_back( points_ys[0] );
 }

 ShapeUpdated();
 }
}


// -----------------------------------------------------------------------------
// mpBitmapLayer - provided by Jose Luis Blanco
// -----------------------------------------------------------------------------
void mpBitmapLayer::GetBitmapCopy( wxImage& outBmp ) const
{
 if( m_validImg )
 outBmp = m_bitmap;
}


void mpBitmapLayer::SetBitmap( const wxImage& inBmp, double x, double y, double lx, double ly )
{
 if( inBmp.Ok() )
 {
 m_bitmap = inBmp; // .GetSubBitmap( wxRect(0, 0, inBmp.GetWidth(), inBmp.GetHeight()));
 m_min_x = x;
 m_min_y = y;
 m_max_x = x + lx;
 m_max_y = y + ly;
 m_validImg = true;
 }
}


void mpBitmapLayer::Plot( wxDC& dc, mpWindow& w )
{
 if( m_visible && m_validImg )
 {
 /* 1st: We compute (x0,y0)-(x1,y1), the pixel coordinates of the real outer limits
 * of the image rectangle within the (screen) mpWindow. Note that these coordinates
 * might fall well far away from the real view limits when the user zoom in.
 *
 * 2nd: We compute (dx0,dy0)-(dx1,dy1), the pixel coordinates the rectangle that will
 * be actually drawn into the mpWindow, i.e. the clipped real rectangle that
 * avoids the non-visible parts. (offset_x,offset_y) are the pixel coordinates
 * that correspond to the window point (dx0,dy0) within the image "m_bitmap", and
 * (b_width,b_height) is the size of the bitmap patch that will be drawn.
 *
 * (x0,y0) ................. (x1,y0)
 * . .
 * . .
 * (x0,y1) ................ (x1,y1)
 * (In pixels!!)
 */

 // 1st step -------------------------------
 wxCoord x0 = w.x2p( m_min_x );
 wxCoord y0 = w.y2p( m_max_y );
 wxCoord x1 = w.x2p( m_max_x );
 wxCoord y1 = w.y2p( m_min_y );

 // 2nd step -------------------------------
 // Precompute the size of the actual bitmap pixel on the screen (e.g. will be >1 if zoomed in)
 double screenPixelX = ( x1 - x0 ) / (double) m_bitmap.GetWidth();
 double screenPixelY = ( y1 - y0 ) / (double) m_bitmap.GetHeight();

 // The minimum number of pixels that the stretched image will overpass the actual mpWindow borders:
 wxCoord borderMarginX = (wxCoord) (screenPixelX + 1); // ceil
 wxCoord borderMarginY = (wxCoord) (screenPixelY + 1); // ceil

 // The actual drawn rectangle (dx0,dy0)-(dx1,dy1) is (x0,y0)-(x1,y1) clipped:
 wxCoord dx0 = x0, dx1 = x1, dy0 = y0, dy1 = y1;

 if( dx0 < 0 )
 dx0 = -borderMarginX;

 if( dy0 < 0 )
 dy0 = -borderMarginY;

 if( dx1 > w.GetScrX() )
 dx1 = w.GetScrX() + borderMarginX;

 if( dy1 > w.GetScrY() )
 dy1 = w.GetScrY() + borderMarginY;

 // For convenience, compute the width/height of the rectangle to be actually drawn:
 wxCoord d_width = dx1 - dx0 + 1;
 wxCoord d_height = dy1 - dy0 + 1;

 // Compute the pixel offsets in the internally stored bitmap:
 wxCoord offset_x = (wxCoord) ( (dx0 - x0) / screenPixelX );
 wxCoord offset_y = (wxCoord) ( (dy0 - y0) / screenPixelY );

 // and the size in pixel of the area to be actually drawn from the internally stored bitmap:
 wxCoord b_width = (wxCoord) ( (dx1 - dx0 + 1) / screenPixelX );
 wxCoord b_height = (wxCoord) ( (dy1 - dy0 + 1) / screenPixelY );

 // Is there any visible region?
 if( d_width>0 && d_height>0 )
 {
 // Build the scaled bitmap from the image, only if it has changed:
 if( m_scaledBitmap.GetWidth()!=d_width
 || m_scaledBitmap.GetHeight()!=d_height
 || m_scaledBitmap_offset_x != offset_x
 || m_scaledBitmap_offset_y != offset_y )
 {
 wxRect r( wxRect( offset_x, offset_y, b_width, b_height ) );

 // Just for the case....
 if( r.x < 0 )
 r.x = 0;

 if( r.y < 0 )
 r.y = 0;

 if( r.width>m_bitmap.GetWidth() )
 r.width = m_bitmap.GetWidth();

 if( r.height>m_bitmap.GetHeight() )
 r.height = m_bitmap.GetHeight();

 m_scaledBitmap = wxBitmap(
 wxBitmap( m_bitmap ).GetSubBitmap( r ).ConvertToImage()
 .Scale( d_width, d_height ) );
 m_scaledBitmap_offset_x = offset_x;
 m_scaledBitmap_offset_y = offset_y;
 }

 // Draw it:
 dc.DrawBitmap( m_scaledBitmap, dx0, dy0, true );
 }
 }

 // Draw the name label
 if( !m_name.IsEmpty() && m_showName )
 {
 dc.SetFont( m_font );

 wxCoord tx, ty;
 dc.GetTextExtent( m_name, &tx, &ty );

 if( HasBBox() )
 {
 wxCoord sx = (wxCoord) ( ( m_max_x - w.GetPosX() ) * w.GetScaleX() );
 wxCoord sy = (wxCoord) ( (w.GetPosY() - m_max_y ) * w.GetScaleY() );

 tx = sx - tx - 8;
 ty = sy - 8 - ty;
 }
 else
 {
 const int sx = w.GetScrX() >> 1;
 const int sy = w.GetScrY() >> 1;

 if( (m_flags & mpALIGNMASK) == mpALIGN_NE )
 {
 tx = sx - tx - 8;
 ty = -sy + 8;
 }
 else if( (m_flags & mpALIGNMASK) == mpALIGN_NW )
 {
 tx = -sx + 8;
 ty = -sy + 8;
 }
 else if( (m_flags & mpALIGNMASK) == mpALIGN_SW )
 {
 tx = -sx + 8;
 ty = sy - 8 - ty;
 }
 else
 {
 tx = sx - tx - 8;
 ty = sy - 8 - ty;
 }
 }

 dc.DrawText( m_name, tx, ty );
 }
}


void mpFXY::SetScale( mpScaleBase* scaleX, mpScaleBase* scaleY )
{
 m_scaleX = scaleX;
 m_scaleY = scaleY;

 UpdateScales();
}


void mpFXY::UpdateScales()
{
 if( m_scaleX )
 m_scaleX->ExtendDataRange( GetMinX(), GetMaxX() );

 if( m_scaleY )
 m_scaleY->ExtendDataRange( GetMinY(), GetMaxY() );
}


double mpFXY::s2x( double plotCoordX ) const
{
 return m_scaleX->TransformFromPlot( plotCoordX );
}


double mpFXY::s2y( double plotCoordY ) const
{
 return m_scaleY->TransformFromPlot( plotCoordY );
}


double mpFXY::x2s( double x ) const
{
 return m_scaleX->TransformToPlot( x );
}


double mpFXY::y2s( double y ) const
{
 return m_scaleY->TransformToPlot( y );
}