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: 2024
// Copyright: (c) David Schalig, Davide Rondini
// Copyright (c) 2021-2024 KiCad Developers, see AUTHORS.txt for contributors.
// 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"
#include "gal/cursors.h"
#endif
 
#include <widgets/mathplot.h>
#include <wx/graphics.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
 
// 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_visible = true;
}
 
 
// -----------------------------------------------------------------------------
// 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()
{
}
 
 
bool mpInfoLayer::Inside( const wxPoint& point ) const
{
 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 );
 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();
}
 
 
mpInfoLegend::mpInfoLegend() :
 mpInfoLayer()
{
}
 
 
mpInfoLegend::mpInfoLegend( wxRect rect, const wxBrush* brush ) :
 mpInfoLayer( rect, brush )
{
}
 
 
mpInfoLegend::~mpInfoLegend()
{
}
 
 
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;
 }
 
 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;
 int tmpY = 0;
 mpLayer* layer = nullptr;
 wxPen lpen;
 wxString label;
 
 for( unsigned int p = 0; p < w.CountAllLayers(); p++ )
 {
 layer = w.GetLayer( p );
 
 if( layer->GetLayerType() == mpLAYER_PLOT && layer->IsVisible() )
 {
 label = layer->GetDisplayName();
 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++ )
 {
 layer = w.GetLayer( p2 );
 
 if( layer->GetLayerType() == mpLAYER_PLOT && layer->IsVisible() )
 {
 label = layer->GetDisplayName();
 lpen = layer->GetPen();
 dc.GetTextExtent( label, &tmpX, &tmpY );
 dc.SetPen( lpen );
 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.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 = w.GetMarginLeft();
 wxCoord endPx = w.GetScrX() - w.GetMarginRight();
 wxCoord minYpx = w.GetMarginTop();
 wxCoord maxYpx = 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( (iy >= minYpx) && (iy <= maxYpx) )
 dc.DrawPoint( i, iy );
 }
 }
 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( iy >= minYpx && iy <= maxYpx )
 dc.DrawLine( i, iy, i, iy );
 }
 }
 
 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() - 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 = w.GetMarginLeft();
 wxCoord endPx = w.GetScrX() - w.GetMarginRight();
 wxCoord minYpx = w.GetMarginTop();
 wxCoord maxYpx = w.GetScrY() - w.GetMarginBottom();
 
 if( m_pen.GetWidth() <= 1 )
 {
 for( i = minYpx; i < maxYpx; ++i )
 {
 ix = w.x2p( GetX( w.p2y( i ) ) );
 
 if( (ix >= startPx) && (ix <= endPx) )
 dc.DrawPoint( ix, i );
 }
 }
 else
 {
 for( i = 0; i< w.GetScrY(); ++i )
 {
 ix = w.x2p( GetX( w.p2y( i ) ) );
 
 if( (ix >= startPx) && (ix <= endPx) )
 dc.DrawLine( ix, i, ix, 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 );
 }
 }
}
 
 
IMPLEMENT_ABSTRACT_CLASS( mpFXY, mpLayer )
 
mpFXY::mpFXY( const wxString& name, int flags )
{
 SetName( name );
 m_flags = flags;
 m_type = mpLAYER_PLOT;
 m_scaleX = nullptr;
 m_scaleY = nullptr;
 
 // 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 trace doesn't have any data yet then it won't have any scale set. In any case, there's
 // nothing to plot.
 if( !GetCount() )
 return;
 
 wxCHECK_RET( m_scaleX, wxS( "X scale was not set" ) );
 wxCHECK_RET( m_scaleY, wxS( "Y scale was not set" ) );
 
 if( !m_visible )
 return;
 
 wxCoord startPx = w.GetMarginLeft();
 wxCoord endPx = w.GetScrX() - w.GetMarginRight();
 wxCoord minYpx = w.GetMarginTop();
 wxCoord maxYpx = w.GetScrY() - w.GetMarginBottom();
 
 // Check for a collapsed window before we try to allocate a negative number of points
 if( endPx <= startPx || minYpx >= maxYpx )
 return;
 
 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();
 
 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( (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 for( int sweep = 0; sweep < GetSweepCount(); ++sweep )
 {
 SetSweepWindow( sweep );
 
 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 ) * 2 );
 
 double nextX;
 double nextY;
 bool hasNext = GetNextXY( nextX, nextY );
 bool offRight = false;
 
 // Note: we can use dc.DrawLines() only for a reasonable number or points (<10,000),
 // because at least on Windows dc.DrawLines() can hang for a lot of points. Note that
 // this includes the intermediate points when drawing dotted lines.
 
 // Our first-pass optimization is to exclude points outside the view, and aggregate all
 // contiguous y values found at a single x value into a vertical line.
 while( hasNext )
 {
 x = nextX;
 y = nextY;
 hasNext = GetNextXY( nextX, nextY );
 
 double px = m_scaleX->TransformToPlot( x );
 double py = m_scaleY->TransformToPlot( y );
 
 wxCoord x1 = w.x2p( px );
 wxCoord y1 = w.y2p( py );
 
 // Note that we can't start *right* at the edge of the view because we need to
 // interpolate between two points, one of which might be outside the view.
 // 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 )
 {
 wxCoord nextX1 = w.x2p( m_scaleX->TransformToPlot( nextX ) );
 
 if( nextX1 < startPx-1 )
 continue;
 }
 else if( x1 > endPx )
 {
 if( offRight )
 continue;
 else
 offRight = true;
 }
 
 if( !count || line_start.x != x1 )
 {
 // We've aggregated a bunch of y values with a shared x value, so we need to draw
 // a vertical line. However, short vertical segments spoil anti-aliasing on
 // Retina displays, so only draw them if they're "significant" (the user should
 // zoom in if they need a more accurate picture).
 if( count && dupx0 > 1 && abs( ymax0 - ymin0 ) > 2 )
 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 )
 {
 // Second pass optimization is to merge horizontal segments. This improves the look
 // of dotted lines, keeps the point count down, and it's easy.
 //
 // This pass also includes a final protection to keep MSW from hanging by chunking to
 // a size it can handle.
 std::vector<wxPoint> drawPoints;
 drawPoints.reserve( ( endPx - startPx ) * 2 );
 
#ifdef __WXMSW__
 int chunkSize = 10000;
#else
 int chunkSize = 100000;
#endif
 if( dc.GetPen().GetStyle() == wxPENSTYLE_DOT )
 chunkSize /= 500;
 
 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] );
 
 if( (int) drawPoints.size() > chunkSize )
 {
 dc.DrawLines( (int) drawPoints.size(), &drawPoints[0] );
 drawPoints.clear();
 
 // Restart the line with the current point
 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( (int) drawPoints.size(), &drawPoints[0] );
 }
 }
 
 if( !m_name.IsEmpty() && m_showName )
 {
 dc.SetFont( m_font );
 
 wxCoord tx, ty;
 dc.GetTextExtent( m_name, &tx, &ty );
 
 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();
}
 
 
// -----------------------------------------------------------------------------
// 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;
 int m_scrX = w.GetXScreen();
 
 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 numberSteps = floor( ( maxVvis - minVvis ) / bestStep );
 
 // Half the number of ticks according to window size.
 // The value 96 is used to have only 4 ticks when m_scrX is 268.
 // For each 96 device context units, is possible to add a new tick.
 while( numberSteps - 2.0 >= m_scrX/96.0 )
 {
 bestStep *= 2;
 numberSteps = floor( ( maxVvis - minVvis ) / bestStep );
 }
 
 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_axisLocked = false;
 m_axisMin = 0;
 m_axisMax = 0;
 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( const TICK_LABEL& tickLabel : m_tickLabels )
 {
 int tx, ty;
 const wxString s = tickLabel.label;
 
 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 );
}
 
 
void mpScaleY::getVisibleDataRange( mpWindow& w, double& minV, double& maxV )
{
 wxCoord minYpx = w.GetMarginTop();
 wxCoord maxYpx = 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 )
{
 // No need for slave ticks when there aren't 2 main ticks for them to go between
 if( m_masterScale->m_tickValues.size() < 2 )
 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();
 
 m_absVisibleMaxV = 0;
 
 for( double tickValue : m_masterScale->m_tickValues )
 {
 double m = TransformFromPlot( m_masterScale->TransformToPlot( tickValue ) );
 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 )
{
 double minVvis, maxVvis;
 
 if( m_axisLocked )
 {
 minVvis = m_axisMin;
 maxVvis = m_axisMax;
 m_offset = -m_axisMin;
 m_scale = 1.0 / ( m_axisMax - m_axisMin );
 }
 else if( m_masterScale )
 {
 computeSlaveTicks( w );
 updateTickLabels( dc, w );
 
 return;
 }
 else
 {
 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;
 int m_scrY = w.GetYScreen();
 
 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 numberSteps = floor( ( maxVvis - minVvis ) / bestStep );
 
 // Half the number of ticks according to window size.
 // For each 32 device context units, is possible to add a new tick.
 while( numberSteps >= m_scrY/32.0 )
 {
 bestStep *= 2;
 numberSteps = floor( ( maxVvis - minVvis ) / bestStep );
 }
 
 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 );
 
 updateTickLabels( dc, w );
}
 
 
void mpScaleXBase::getVisibleDataRange( mpWindow& w, double& minV, double& maxV )
{
 wxCoord startPx = w.GetMarginLeft();
 wxCoord endPx = 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 step = 10.0;
 int m_scrX = w.GetXScreen();
 
 double d;
 
 m_tickValues.clear();
 m_tickLabels.clear();
 
 if( minDecade == 0.0 )
 return;
 
 // Half the number of ticks according to window size.
 // The value 96 is used to have only 4 ticks when m_scrX is 268.
 // For each 96 device context units, is possible to add a new tick.
 while( visibleDecades - 2 >= m_scrX / 96.0 )
 {
 step *= 10.0;
 visibleDecades = log( maxVvis / minVvis ) / log( step );
 }
 
 for( d = minDecade; d<=maxDecade; d *= step )
 {
 m_tickLabels.emplace_back( d );
 
 for( double dd = d; dd < d * step; 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_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 );
 
 if( m_flags == mpALIGN_TOP )
 orgy = w.GetMarginTop();
 
 if( m_flags == mpALIGN_BOTTOM )
 orgy = w.GetScrY() - w.GetMarginBottom();
 
 if( m_flags == mpALIGN_BORDER_BOTTOM )
 orgy = w.GetScrY() - 1;
 
 if( m_flags == mpALIGN_BORDER_TOP )
 orgy = 1;
 
 wxCoord startPx = w.GetMarginLeft();
 wxCoord endPx = w.GetScrX() - w.GetMarginRight();
 wxCoord minYpx = w.GetMarginTop();
 wxCoord maxYpx = 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( double tp : m_tickValues )
 {
 double px = TransformToPlot( tp );
 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_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 )
 dc.DrawLine( p, orgy - 4, p, maxYpx );
 else
 dc.DrawLine( p, minYpx, p, maxYpx );
 }
 
 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( const TICK_LABEL& tickLabel : m_tickLabels )
 {
 if( !tickLabel.visible )
 continue;
 
 double px = TransformToPlot( tickLabel.pos );
 const int p = (int) ( ( px - w.GetPosX() ) * w.GetScaleX() );
 
 if( (p >= startPx) && (p <= endPx) )
 {
 // Write ticks labels in s string
 wxString s = tickLabel.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( 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 = nullptr;
 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;
 
 if( m_flags == mpALIGN_CENTER )
 orgx = w.x2p( 0 );
 
 if( m_flags == mpALIGN_LEFT )
 orgx = w.GetMarginLeft();
 
 if( m_flags == mpALIGN_RIGHT )
 orgx = w.GetScrX() - w.GetMarginRight();
 
 if( m_flags == mpALIGN_FAR_RIGHT )
 orgx = w.GetScrX() - ( w.GetMarginRight() / 2 );
 
 if( m_flags == mpALIGN_BORDER_RIGHT )
 orgx = w.GetScrX() - 1;
 
 if( m_flags == mpALIGN_BORDER_LEFT )
 orgx = 1;
 
 wxCoord endPx = w.GetScrX() - w.GetMarginRight();
 wxCoord minYpx = w.GetMarginTop();
 wxCoord maxYpx = w.GetScrY() - w.GetMarginBottom();
 // Draw line
 dc.DrawLine( orgx, minYpx, orgx, maxYpx );
 
 wxCoord tx, ty;
 wxString s;
 wxString fmt;
 
 int labelW = 0;
 // Before staring cycle, calculate label height
 int labelHeight = 0;
 s.Printf( fmt, 0 );
 dc.GetTextExtent( s, &tx, &labelHeight );
 
 for( double tp : m_tickValues )
 {
 double py = TransformToPlot( tp );
 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 );
 }
 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( const TICK_LABEL& tickLabel : m_tickLabels )
 {
 double py = TransformToPlot( tickLabel.pos );
 const int p = (int) ( ( w.GetPosY() - py ) * w.GetScaleY() );
 
 if( !tickLabel.visible )
 continue;
 
 if( p >= minYpx && p <= maxYpx )
 {
 s = tickLabel.label;
 dc.GetTextExtent( s, &tx, &ty );
 
 if( m_flags == mpALIGN_BORDER_LEFT || m_flags == mpALIGN_RIGHT || m_flags == mpALIGN_FAR_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
 
 dc.GetTextExtent( m_name, &tx, &ty );
 
 switch( m_nameFlags )
 {
 case mpALIGN_BORDER_LEFT:
 dc.DrawText( m_name, labelW + 8, 4 );
 break;
 
 case mpALIGN_LEFT:
 dc.DrawText( m_name, orgx - ( tx / 2 ), minYpx - ty - 4 );
 break;
 
 case mpALIGN_CENTER:
 dc.DrawText( m_name, orgx + 4, 4 );
 break;
 
 case mpALIGN_RIGHT:
 case mpALIGN_FAR_RIGHT:
 dc.DrawText( m_name, orgx - ( tx / 2 ), 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_MIDDLE_DOWN( mpWindow::OnMouseMiddleDown ) // JLB
EVT_RIGHT_UP( mpWindow::OnShowPopupMenu )
EVT_MOUSEWHEEL( mpWindow::onMouseWheel ) // JLB
EVT_MAGNIFY( mpWindow::onMagnify )
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_ZOOM_UNDO, mpWindow::onZoomUndo )
EVT_MENU( mpID_ZOOM_REDO, mpWindow::onZoomRedo )
END_EVENT_TABLE()
 
mpWindow::mpWindow() : mpWindow( DelegatingContructorTag() )
{
 initializeGraphicsContext();
}
 
mpWindow::mpWindow( wxWindow* parent, wxWindowID id ) :
 mpWindow( DelegatingContructorTag(), parent, id, wxDefaultPosition, wxDefaultSize, 0,
 wxT( "mathplot" ) )
{
 m_popmenu.Append( mpID_ZOOM_UNDO, _( "Undo Last Zoom" ), _( "Return zoom to level prior to last zoom action" ) );
 m_popmenu.Append( mpID_ZOOM_REDO, _( "Redo Last Zoom" ), _( "Return zoom to level prior to last zoom undo" ) );
 m_popmenu.AppendSeparator();
 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.Append( mpID_CENTER, _( "Center on Cursor" ), _( "Center plot view to this position" ) );
 m_popmenu.Append( mpID_FIT, _( "Fit on Screen" ), _( "Set plot view to show all items" ) );
 
 m_layers.clear();
 SetBackgroundColour( *wxWHITE );
 m_bgColour = *wxWHITE;
 m_fgColour = *wxBLACK;
 
 SetSizeHints( 128, 128 );
 
 // J.L.Blanco: Eliminates the "flick" with the double buffer.
 SetBackgroundStyle( wxBG_STYLE_CUSTOM );
 
 initializeGraphicsContext();
 UpdateAll();
}
 
 
mpWindow::~mpWindow()
{
 // Free all the layers:
 DelAllLayers( true, false );
 
 delete m_buff_bmp;
 m_buff_bmp = nullptr;
}
 
 
// 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();
}
 
 
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 );
}
 
 
// Process mouse wheel events
// JLB
void mpWindow::onMouseWheel( wxMouseEvent& event )
{
 if( !m_enableMouseNavigation )
 {
 event.Skip();
 return;
 }
 
 const wxMouseWheelAxis axis = event.GetWheelAxis();
 const int modifiers = event.GetModifiers();
 MouseWheelAction action = MouseWheelAction::NONE;
 
 if( axis == wxMOUSE_WHEEL_HORIZONTAL )
 {
 action = m_mouseWheelActions.horizontal;
 }
 else if( modifiers == wxMOD_NONE )
 {
 action = m_mouseWheelActions.verticalUnmodified;
 }
 else if( modifiers == wxMOD_CONTROL )
 {
 action = m_mouseWheelActions.verticalWithCtrl;
 }
 else if( modifiers == wxMOD_SHIFT )
 {
 action = m_mouseWheelActions.verticalWithShift;
 }
 else if( modifiers == wxMOD_ALT )
 {
 action = m_mouseWheelActions.verticalWithAlt;
 }
 else
 {
 event.Skip();
 return;
 }
 
 PerformMouseWheelAction( event, action );
}
 
 
// If the user "drags" with the right button pressed, do "pan"
// JLB
void mpWindow::onMouseMove( wxMouseEvent& event )
{
 if( !m_enableMouseNavigation )
 {
 event.Skip();
 return;
 }
 
 wxCursor cursor = wxCURSOR_MAGNIFIER;
 
 if( event.m_middleDown )
 {
 cursor = wxCURSOR_ARROW;
 
 // 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();
 
 if( Ax )
 {
 double Ax_units = Ax / m_scaleX;
 SetXView( m_posX + Ax_units, m_desiredXmax + Ax_units, m_desiredXmin + Ax_units );
 }
 
 if( Ay )
 {
 double Ay_units = -Ay / m_scaleY;
 SetYView( m_posY + Ay_units, m_desiredYmax + Ay_units, m_desiredYmin + Ay_units );
 }
 
 if( Ax || Ay )
 UpdateAll();
 }
 else if( event.m_leftDown )
 {
 if( m_movingInfoLayer )
 {
 if( dynamic_cast<mpInfoLegend*>( m_movingInfoLayer ) )
 cursor = wxCURSOR_SIZING;
 else
 cursor = wxCURSOR_SIZEWE;
 
 wxPoint moveVector( event.GetX() - m_mouseLClick.x, event.GetY() - m_mouseLClick.y );
 m_movingInfoLayer->Move( moveVector );
 m_zooming = false;
 }
 else
 {
 cursor = wxCURSOR_MAGNIFIER;
 
 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;
 }
 
 UpdateAll();
 }
 else
 {
 for( mpLayer* layer : m_layers)
 {
 if( layer->IsInfo() && layer->IsVisible() )
 {
 mpInfoLayer* infoLayer = (mpInfoLayer*) layer;
 
 if( infoLayer->Inside( event.GetPosition() ) )
 {
 if( dynamic_cast<mpInfoLegend*>( infoLayer ) )
 cursor = wxCURSOR_SIZING;
 else
 cursor = wxCURSOR_SIZEWE;
 }
 }
 }
 }
 
 SetCursor( cursor );
 
 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 != nullptr )
 {
 m_movingInfoLayer->UpdateReference();
 m_movingInfoLayer = nullptr;
 }
 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, const wxCoord* printSizeX,
 const wxCoord* printSizeY, wxOrientation directions )
{
 const bool isPrinting = printSizeX != nullptr && printSizeY != nullptr;
 
 // Save desired borders:
 double newDesiredXmin = xMin;
 double newDesiredXmax = xMax;
 double newDesiredYmin = yMin;
 double newDesiredYmax = yMax;
 
 // Provide a gap between the extrema of the curve and the top/bottom edges of the
 // plot area. Not to be confused with the left/right/top/bottom margins outside the plot area.
 const double xGap = fabs( xMax - xMin ) * m_leftRightPlotGapFactor;
 const double yGap = fabs( yMax - yMin ) * m_topBottomPlotGapFactor;
 xMin -= xGap;
 xMax += xGap;
 yMin -= yGap;
 yMax += yGap;
 
 int newScrX = m_scrX;
 int newScrY = m_scrY;
 
 if( isPrinting )
 {
 // Printer:
 newScrX = *printSizeX;
 newScrY = *printSizeY;
 }
 else
 {
 // Normal case (screen):
 GetClientSize( &newScrX, &newScrY );
 }
 
 // Compute the width/height in pixels for the plot area.
 const int plotScreenWidth = newScrX - m_marginLeft - m_marginRight;
 const int plotScreenHeight = newScrY - m_marginTop - m_marginBottom;
 
 // Adjust scale so that desired X/Y span plus extra gap fits in the plot area
 double desiredSpanX = xMax - xMin;
 double desiredSpanY = yMax - yMin;
 double newScaleX = ( desiredSpanX != 0 ) ? double( plotScreenWidth ) / desiredSpanX : 1;
 double newScaleY = ( desiredSpanY != 0 ) ? double( plotScreenHeight ) / desiredSpanY : 1;
 
 // Adjust corner coordinates:
 // Upstream's aspect lock code has been removed, so no need to account for centering.
 double newPosX = xMin - ( m_marginLeft / newScaleX );
 double newPosY = yMax + ( m_marginTop / newScaleY );
 
 // Commit above changes to member variables only if enabled for their respective dimension.
 if( ( ( directions & wxHORIZONTAL ) != 0 ) || isPrinting )
 {
 // Don't commit the passed desired bounds when printing
 if( !isPrinting )
 {
 m_desiredXmin = newDesiredXmin;
 m_desiredXmax = newDesiredXmax;
 }
 
 m_scrX = newScrX;
 m_scaleX = newScaleX;
 m_posX = newPosX;
 }
 
 if( ( ( directions & wxVERTICAL ) != 0 ) || isPrinting )
 {
 // Don't commit the passed desired bounds when printing
 if( !isPrinting )
 {
 m_desiredYmin = newDesiredYmin;
 m_desiredYmax = newDesiredYmax;
 }
 
 m_scrY = newScrY;
 m_scaleY = newScaleY;
 m_posY = newPosY;
 }
 
 // It is VERY IMPORTANT to 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
 // The caller wanting to print should perform another Fit() afterwards to restore this
 // object's state.
 if( !isPrinting )
 UpdateAll();
}
 
 
void mpWindow::AdjustLimitedView( wxOrientation directions )
{
 if( !m_enableLimitedView )
 return;
 
 // The m_desired* members are expressed in plot coordinates.
 // They should be clamped against their respective m_minX, m_maxX, m_minY, m_maxY limits.
 
 if( ( directions & wxHORIZONTAL ) != 0 )
 {
 if( m_desiredXmin < m_minX )
 {
 double diff = m_minX - m_desiredXmin;
 m_posX += diff;
 m_desiredXmax += diff;
 m_desiredXmin = m_minX;
 }
 
 if( m_desiredXmax > m_maxX )
 {
 double diff = m_desiredXmax - m_maxX;
 m_posX -= diff;
 m_desiredXmin -= diff;
 m_desiredXmax = m_maxX;
 }
 }
 
 if( ( directions & wxVERTICAL ) != 0 )
 {
 if( m_desiredYmin < m_minY )
 {
 double diff = m_minY - m_desiredYmin;
 m_posY += diff;
 m_desiredYmax += diff;
 m_desiredYmin = m_minY;
 }
 
 if( m_desiredYmax > m_maxY )
 {
 double diff = m_desiredYmax - m_maxY;
 m_posY -= diff;
 m_desiredYmin -= diff;
 m_desiredYmax = m_maxY;
 }
 }
}
 
 
bool mpWindow::SetXView( double pos, double desiredMax, double desiredMin )
{
 // TODO (ecorm): Investigate X scale flickering when panning at minimum zoom level
 // Possible cause: When AdjustLimitedView subtracts the out-of-bound delta, it does not
 // revert back to the exact same original coordinates due to floating point rounding errors.
 m_posX = pos;
 m_desiredXmax = desiredMax;
 m_desiredXmin = desiredMin;
 AdjustLimitedView( wxHORIZONTAL );
 
 return true;
}
 
 
bool mpWindow::SetYView( double pos, double desiredMax, double desiredMin )
{
 m_posY = pos;
 m_desiredYmax = desiredMax;
 m_desiredYmin = desiredMin;
 AdjustLimitedView( wxVERTICAL );
 
 return true;
}
 
 
void mpWindow::ZoomIn( const wxPoint& centerPoint )
{
 ZoomIn( centerPoint, zoomIncrementalFactor, wxBOTH );
}
 
 
void mpWindow::ZoomIn( const wxPoint& centerPoint, double zoomFactor, wxOrientation directions )
{
 DoZoom( centerPoint, zoomFactor, directions );
}
 
 
void mpWindow::ZoomOut( const wxPoint& centerPoint )
{
 ZoomOut( centerPoint, zoomIncrementalFactor, wxBOTH );
}
 
 
void mpWindow::ZoomOut( const wxPoint& centerPoint, double zoomFactor, wxOrientation directions )
{
 if( zoomFactor == 0 )
 zoomFactor = 1.0;
 DoZoom( centerPoint, 1.0 / zoomFactor, directions );
}
 
 
void mpWindow::ZoomRect( wxPoint p0, wxPoint p1 )
{
 pushZoomUndo( { m_desiredXmin, m_desiredXmax, m_desiredYmin, m_desiredYmax } );
 
 // Constrain given rectangle to plot area
 const int pMinX = m_marginLeft;
 const int pMaxX = m_scrX - m_marginRight;
 const int pMinY = m_marginTop;
 const int pMaxY = m_scrY - m_marginBottom;
 p0.x = std::max( p0.x, pMinX );
 p0.x = std::min( p0.x, pMaxX );
 p0.y = std::max( p0.y, pMinY );
 p0.y = std::min( p0.y, pMaxY );
 p1.x = std::max( p1.x, pMinX );
 p1.x = std::min( p1.x, pMaxX );
 p1.y = std::max( p1.y, pMinY );
 p1.y = std::min( p1.y, pMaxY );
 
 // 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;
 
 if( m_yLocked )
 {
 zoom_y_min = m_desiredYmin;
 zoom_y_max = m_desiredYmax;
 }
 
 Fit( zoom_x_min, zoom_x_max, zoom_y_min, zoom_y_max );
 
 // Even with the input rectangle contrained to the plot area, it's still possible for the
 // resulting view to exceed limits when a portion of the gap is grabbed.
 AdjustLimitedView();
 
 // These additional checks are needed because AdjustLimitedView only adjusts the position
 // and not the scale.
 wxOrientation directionsNeedingRefitting = ViewNeedsRefitting( wxBOTH );
 if( directionsNeedingRefitting != 0 )
 Fit( m_minX, m_maxX, m_minY, m_maxY, nullptr, nullptr, directionsNeedingRefitting );
}
 
 
void mpWindow::pushZoomUndo( const std::array<double, 4>& aZoom )
{
 m_undoZoomStack.push( aZoom );
 
 while( !m_redoZoomStack.empty() )
 m_redoZoomStack.pop();
}
 
 
void mpWindow::ZoomUndo()
{
 if( m_undoZoomStack.size() )
 {
 m_redoZoomStack.push( { m_desiredXmin, m_desiredXmax, m_desiredYmin, m_desiredYmax } );
 
 std::array<double, 4> zoom = m_undoZoomStack.top();
 m_undoZoomStack.pop();
 
 Fit( zoom[0], zoom[1], zoom[2], zoom[3] );
 AdjustLimitedView();
 }
}
 
 
void mpWindow::ZoomRedo()
{
 if( m_redoZoomStack.size() )
 {
 m_undoZoomStack.push( { m_desiredXmin, m_desiredXmax, m_desiredYmin, m_desiredYmax } );
 
 std::array<double, 4> zoom = m_redoZoomStack.top();
 m_redoZoomStack.pop();
 
 Fit( zoom[0], zoom[1], zoom[2], zoom[3] );
 AdjustLimitedView();
 }
}
 
 
void mpWindow::OnShowPopupMenu( wxMouseEvent& event )
{
 m_clickedX = event.GetX();
 m_clickedY = event.GetY();
 
 m_popmenu.Enable( mpID_ZOOM_UNDO, !m_undoZoomStack.empty() );
 m_popmenu.Enable( mpID_ZOOM_REDO, !m_redoZoomStack.empty() );
 
 PopupMenu( &m_popmenu, event.GetX(), event.GetY() );
}
 
 
void mpWindow::OnFit( wxCommandEvent& WXUNUSED( event ) )
{
 pushZoomUndo( { m_desiredXmin, m_desiredXmax, m_desiredYmin, m_desiredYmax } );
 
 Fit();
}
 
 
void mpWindow::OnCenter( wxCommandEvent& WXUNUSED( event ) )
{
 GetClientSize( &m_scrX, &m_scrY );
 int centerX = (m_scrX - m_marginLeft - m_marginRight) / 2;
 int centerY = (m_scrY - m_marginTop - m_marginBottom) / 2;
 SetPos( p2x( m_clickedX - centerX ), p2y( m_clickedY - centerY ) );
}
 
 
mpWindow::MouseWheelActionSet mpWindow::defaultMouseWheelActions()
{
 MouseWheelActionSet actions;
 actions.verticalUnmodified = MouseWheelAction::ZOOM;
 actions.verticalWithCtrl = MouseWheelAction::PAN_LEFT_RIGHT;
 actions.verticalWithShift = MouseWheelAction::PAN_UP_DOWN;
 actions.verticalWithAlt = MouseWheelAction::NONE;
 actions.horizontal = MouseWheelAction::NONE;
 return actions;
}
 
 
void mpWindow::onZoomIn( wxCommandEvent& WXUNUSED( event ) )
{
 ZoomIn( wxPoint( m_mouseMClick.x, m_mouseMClick.y ) );
}
 
 
void mpWindow::onZoomOut( wxCommandEvent& WXUNUSED( event ) )
{
 ZoomOut();
}
 
 
void mpWindow::onZoomUndo( wxCommandEvent& WXUNUSED( event ) )
{
 ZoomUndo();
}
 
 
void mpWindow::onZoomRedo( wxCommandEvent& WXUNUSED( event ) )
{
 ZoomRedo();
}
 
 
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 )
 {
 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 paintDC( this );
 
 paintDC.GetSize( &m_scrX, &m_scrY ); // This is the size of the visible area only!
 
 // Selects direct or buffered draw:
 wxDC* targetDC = &paintDC;
 
 // J.L.Blanco @ Aug 2007: Added double buffer support
 if( m_enableDoubleBuffer )
 {
 if( m_last_lx != m_scrX || m_last_ly != m_scrY )
 {
 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;
 }
 
 targetDC = &m_buff_dc;
 }
 
 if( wxGraphicsContext* ctx = targetDC->GetGraphicsContext() )
 {
 if( !ctx->SetInterpolationQuality( wxINTERPOLATION_BEST ) )
 if( !ctx->SetInterpolationQuality( wxINTERPOLATION_GOOD ) )
 ctx->SetInterpolationQuality( wxINTERPOLATION_FAST );
 
 ctx->SetAntialiasMode( wxANTIALIAS_DEFAULT );
 }
 
 // Draw background:
 targetDC->SetPen( *wxTRANSPARENT_PEN );
 wxBrush brush( GetBackgroundColour() );
 targetDC->SetBrush( brush );
 targetDC->SetTextForeground( m_fgColour );
 targetDC->DrawRectangle( 0, 0, m_scrX, m_scrY );
 
 // Draw all the layers:
 for( mpLayer* layer : m_layers )
 layer->Plot( *targetDC, *this );
 
 if( m_zooming )
 {
 wxPen pen( m_fgColour, 1, wxPENSTYLE_DOT );
 targetDC->SetPen( pen );
 targetDC->SetBrush( *wxTRANSPARENT_BRUSH );
 targetDC->DrawRectangle( m_zoomRect );
 }
 
 // If doublebuffer, draw now to the window:
 if( m_enableDoubleBuffer )
 paintDC.Blit( 0, 0, m_scrX, m_scrY, targetDC, 0, 0 );
}
 
void mpWindow::DoZoom( const wxPoint& centerPoint, double zoomFactor, wxOrientation directions )
{
 if( m_yLocked )
 {
 if( directions == wxVERTICAL )
 return;
 directions = wxHORIZONTAL;
 }
 
 const bool horizontally = ( directions & wxHORIZONTAL ) != 0;
 const bool vertically = ( directions & wxVERTICAL ) != 0;
 
 pushZoomUndo( { m_desiredXmin, m_desiredXmax, m_desiredYmin, m_desiredYmax } );
 
 // Preserve the position of the clicked point:
 wxPoint c( centerPoint );
 if( c == wxDefaultPosition )
 {
 GetClientSize( &m_scrX, &m_scrY );
 c.x = ( m_scrX - m_marginLeft - m_marginRight ) / 2 + m_marginLeft;
 c.y = ( m_scrY - m_marginTop - m_marginBottom ) / 2 + m_marginTop;
 }
 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 );
 }
 
 // Zoom in/out:
 const double MAX_SCALE = 1e6;
 const double newScaleX = horizontally ? ( m_scaleX * zoomFactor ) : m_scaleX;
 const double newScaleY = vertically ? ( m_scaleY * zoomFactor ) : m_scaleY;
 
 // Baaaaad things happen when you zoom in too much..
 if( newScaleX > MAX_SCALE || newScaleY > MAX_SCALE )
 return;
 
 if( horizontally )
 {
 // Transform the clicked X point to layer coordinates:
 const double prior_layer_x = p2x( c.x );
 
 // Adjust the new X scale and plot X origin:
 m_scaleX = newScaleX;
 m_posX = prior_layer_x - c.x / newScaleX;
 
 // Recompute the desired X view extents:
 RecomputeDesiredX( m_desiredXmin, m_desiredXmax );
 }
 
 if( vertically )
 {
 // Transform the clicked Y point to layer coordinates:
 const double prior_layer_y = p2y( c.y );
 
 // Adjust the new Y scale and plot Y origin:
 m_scaleY = newScaleY;
 m_posY = prior_layer_y + c.y / newScaleY;
 
 // Recompute the desired Y view extents:
 RecomputeDesiredY( m_desiredYmin, m_desiredYmax );
 }
 
 AdjustLimitedView( directions );
 
 if( zoomFactor < 1.0 )
 {
 // These additional checks are needed because AdjustLimitedView only adjusts the position
 // and not the scale.
 wxOrientation directionsNeedingRefitting = ViewNeedsRefitting( directions );
 
 // If the view is still out-of-limits after AdjustLimitedView is called, perform a Fit
 // along the offending dimension(s).
 if( directionsNeedingRefitting != 0 )
 Fit( m_minX, m_maxX, m_minY, m_maxY, nullptr, nullptr, directionsNeedingRefitting );
 }
 
 UpdateAll();
}
 
 
void mpWindow::RecomputeDesiredX( double& min, double& max )
{
 const int plotScreenWidth = m_scrX - m_marginLeft - m_marginRight;
 const double plotSpanX = plotScreenWidth / m_scaleX;
 const double desiredSpanX = plotSpanX / ( 2 * m_leftRightPlotGapFactor + 1 );
 const double xGap = desiredSpanX * m_leftRightPlotGapFactor;
 min = m_posX + ( m_marginLeft / m_scaleX ) + xGap;
 max = m_desiredXmin + desiredSpanX;
}
 
 
void mpWindow::RecomputeDesiredY( double& min, double& max )
{
 const int plotScreenHeight = m_scrY - m_marginTop - m_marginBottom;
 const double plotSpanY = plotScreenHeight / m_scaleY;
 const double desiredSpanY = plotSpanY / ( 2 * m_topBottomPlotGapFactor + 1 );
 const double yGap = desiredSpanY * m_topBottomPlotGapFactor;
 max = m_posY - ( m_marginTop / m_scaleY ) - yGap;
 min = m_desiredYmax - desiredSpanY;
}
 
 
wxOrientation mpWindow::ViewNeedsRefitting( wxOrientation directions ) const
{
 if( !m_enableLimitedView )
 return static_cast<wxOrientation>( 0 );
 
 // Allow a gap between the extrema of the curve and the edges of the plot area. Not to be
 // confused with the left/right/top/bottom margins outside the plot area.
 const double xGap = fabs( m_maxX - m_minX ) * m_leftRightPlotGapFactor;
 const double yGap = fabs( m_maxY - m_minY ) * m_topBottomPlotGapFactor;
 
 wxOrientation result = {};
 
 if( ( directions & wxHORIZONTAL ) != 0 )
 {
 if( ( m_desiredXmax > m_maxX + xGap ) || ( m_desiredXmin < m_minX - xGap ) )
 result = static_cast<wxOrientation>( result | wxHORIZONTAL );
 }
 
 if( ( directions & wxVERTICAL ) != 0 )
 {
 if( ( m_desiredYmax > m_maxY + yGap ) || ( m_desiredYmin < m_minY - yGap ) )
 result = static_cast<wxOrientation>( result | wxVERTICAL );
 }
 
 return result;
}
 
 
void mpWindow::PerformMouseWheelAction( wxMouseEvent& event, MouseWheelAction action )
{
 const int change = event.GetWheelRotation();
 const double changeUnitsX = change / m_scaleX;
 const double changeUnitsY = change / m_scaleY;
 const wxPoint clickPt( event.GetX(), event.GetY() );
 
 switch( action )
 {
 case MouseWheelAction::NONE: break;
 
 case MouseWheelAction::PAN_LEFT_RIGHT:
 SetXView( m_posX + changeUnitsX, m_desiredXmax + changeUnitsX,
 m_desiredXmin + changeUnitsX );
 UpdateAll();
 break;
 
 case MouseWheelAction::PAN_RIGHT_LEFT:
 SetXView( m_posX - changeUnitsX, m_desiredXmax - changeUnitsX,
 m_desiredXmin - changeUnitsX );
 UpdateAll();
 break;
 
 case MouseWheelAction::PAN_UP_DOWN:
 if( !m_yLocked )
 {
 SetYView( m_posY + changeUnitsY, m_desiredYmax + changeUnitsY,
 m_desiredYmin + changeUnitsY );
 UpdateAll();
 }
 break;
 
 case MouseWheelAction::ZOOM:
 if( event.GetWheelRotation() > 0 )
 ZoomIn( clickPt );
 else
 ZoomOut( clickPt );
 break;
 
 case MouseWheelAction::ZOOM_HORIZONTALLY:
 if( event.GetWheelRotation() > 0 )
 ZoomIn( clickPt, zoomIncrementalFactor, wxHORIZONTAL );
 else
 ZoomOut( clickPt, zoomIncrementalFactor, wxHORIZONTAL );
 break;
 
 case MouseWheelAction::ZOOM_VERTICALLY:
 if( event.GetWheelRotation() > 0 )
 ZoomIn( clickPt, zoomIncrementalFactor, wxVERTICAL );
 else
 ZoomOut( clickPt, zoomIncrementalFactor, wxVERTICAL );
 break;
 
 default: break;
 }
}
 
 
bool mpWindow::UpdateBBox()
{
 m_minX = 0.0;
 m_maxX = 1.0;
 m_minY = 0.0;
 m_maxY = 1.0;
 
 return true;
}
 
 
void mpWindow::UpdateAll()
{
 UpdateBBox();
 Refresh( false );
}
 
 
void mpWindow::SetScaleX( double scaleX )
{
 if( scaleX != 0 )
 m_scaleX = scaleX;
 
 UpdateAll();
}
 
 
// New methods implemented by Davide Rondini
 
mpLayer* mpWindow::GetLayer( int position ) const
{
 if( ( position >= (int) m_layers.size() ) || position < 0 )
 return nullptr;
 
 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 nullptr; // 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( wxImage& aImage, wxSize aImageSize, bool aFit )
{
 int sizeX, sizeY;
 
 if( aImageSize == wxDefaultSize )
 {
 sizeX = m_scrX;
 sizeY = m_scrY;
 }
 else
 {
 sizeX = aImageSize.x;
 sizeY = aImageSize.y;
 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( aFit )
 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( aImageSize != wxDefaultSize )
 {
 // Restore dimensions
 int bk_scrX = m_scrX;
 int bk_scrY = m_scrY;
 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
 aImage = screenBuffer.ConvertToImage();
 
 return true;
}
 
 
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 nullptr;
}
 
 
void mpWindow::SetLayerVisible( const wxString& name, bool viewable )
{
 if( mpLayer* lx = GetLayerByName( name ) )
 {
 lx->SetVisible( viewable );
 UpdateAll();
 }
}
 
 
bool mpWindow::IsLayerVisible( const wxString& name ) const
{
 if( const mpLayer* lx = GetLayerByName( name ) )
 return lx->IsVisible();
 
 return false;
}
 
 
void mpWindow::SetLayerVisible( const unsigned int position, bool viewable )
{
 if( mpLayer* lx = GetLayer( position ) )
 {
 lx->SetVisible( viewable );
 UpdateAll();
 }
}
 
 
bool mpWindow::IsLayerVisible( unsigned int position ) const
{
 if( const mpLayer* lx = GetLayer( position ) )
 return lx->IsVisible();
 
 return 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 );
 }
 }
}
 
 
template <typename... Ts>
mpWindow::mpWindow( DelegatingContructorTag, Ts&&... windowArgs ) :
 wxWindow( std::forward<Ts>( windowArgs )... ),
 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_yLocked( false ),
 m_desiredXmin( 0.0 ),
 m_desiredXmax( 1.0 ),
 m_desiredYmin( 0.0 ),
 m_desiredYmax( 1.0 ),
 m_topBottomPlotGapFactor( 0.03 ),
 m_leftRightPlotGapFactor( 0.0 ),
 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_enableLimitedView( false ),
 m_mouseWheelActions( defaultMouseWheelActions() ),
 m_movingInfoLayer( nullptr ),
 m_zooming( false )
{}
 
 
void mpWindow::initializeGraphicsContext()
{
 if( wxGraphicsContext* ctx = m_buff_dc.GetGraphicsContext() )
 {
 if( !ctx->SetInterpolationQuality( wxINTERPOLATION_BEST )
 || !ctx->SetInterpolationQuality( wxINTERPOLATION_GOOD ) )
 {
 ctx->SetInterpolationQuality( wxINTERPOLATION_FAST );
 }
 
 ctx->SetAntialiasMode( wxANTIALIAS_DEFAULT );
 }
}
 
 
// -----------------------------------------------------------------------------
// 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_sweepWindow = 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 );
}
 
 
void mpFXYVector::Rewind()
{
 m_index = 0;
 m_sweepWindow = std::numeric_limits<size_t>::max();
}
 
 
void mpFXYVector::SetSweepWindow( int aSweepIdx )
{
 m_index = aSweepIdx * m_sweepSize;
 m_sweepWindow = ( aSweepIdx + 1 ) * m_sweepSize;
}
 
 
bool mpFXYVector::GetNextXY( double& x, double& y )
{
 if( m_index >= m_xs.size() || m_index >= m_sweepWindow )
 {
 return false;
 }
 else
 {
 x = m_xs[m_index];
 y = m_ys[m_index++];
 return m_index <= m_xs.size() && m_index <= m_sweepWindow;
 }
}
 
 
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 = 0;
 m_maxX = 0;
 m_minY = 0;
 m_maxY = 0;
 }
}
 
 
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 ? m_scaleX->TransformFromPlot( plotCoordX ) : plotCoordX;
}
 
 
double mpFXY::s2y( double plotCoordY ) const
{
 return m_scaleY ? m_scaleY->TransformFromPlot( plotCoordY ) : plotCoordY;
}
 
 
double mpFXY::x2s( double x ) const
{
 return m_scaleX ? m_scaleX->TransformToPlot( x ) : x;
}
 
 
double mpFXY::y2s( double y ) const
{
 return m_scaleY ? m_scaleY->TransformToPlot( y ) : y;
}