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#include <qlayout.h>
#include <qpen.h>
#include <qwt_plot.h>
#include <qwt_plot_canvas.h>
#include <qwt_scale_widget.h>
#include <qwt_scale_draw.h>
#include "plotmatrix.h"
static void enablePlotAxis( QwtPlot *plot, int axis, bool on )
{
// when false we still enable the axis to have an effect
// of the minimal extent active. Instead we hide all visible
// parts and margins/spacings.
plot->enableAxis( axis, true );
QwtScaleDraw *sd = plot->axisScaleDraw( axis );
sd->enableComponent( QwtScaleDraw::Backbone, on );
sd->enableComponent( QwtScaleDraw::Ticks, on );
sd->enableComponent( QwtScaleDraw::Labels, on );
QwtScaleWidget* sw = plot->axisWidget( axis );
sw->setMargin( on ? 4 : 0 );
sw->setSpacing( on ? 20 : 0 );
}
class Plot: public QwtPlot
{
public:
Plot( QWidget *parent = NULL ):
QwtPlot( parent )
{
QwtPlotCanvas *canvas = new QwtPlotCanvas();
canvas->setLineWidth( 1 );
canvas->setFrameStyle( QFrame::Box | QFrame::Plain );
setCanvas( canvas );
}
virtual QSize sizeHint() const
{
return minimumSizeHint();
}
};
class PlotMatrix::PrivateData
{
public:
PrivateData():
inScaleSync( false )
{
isAxisEnabled[QwtPlot::xBottom] = true;
isAxisEnabled[QwtPlot::xTop] = false;
isAxisEnabled[QwtPlot::yLeft] = true;
isAxisEnabled[QwtPlot::yRight] = false;
}
bool isAxisEnabled[QwtPlot::axisCnt];
QVector<QwtPlot *> plotWidgets;
mutable bool inScaleSync;
};
PlotMatrix::PlotMatrix( int numRows, int numColumns, QWidget *parent ):
QFrame( parent )
{
d_data = new PrivateData();
d_data->plotWidgets.resize( numRows * numColumns );
QGridLayout *layout = new QGridLayout( this );
layout->setSpacing( 5 );
for ( int row = 0; row < numRows; row++ )
{
for ( int col = 0; col < numColumns; col++ )
{
QwtPlot *plot = new Plot( this );
layout->addWidget( plot, row, col );
for ( int axis = 0; axis < QwtPlot::axisCnt; axis++ )
{
connect( plot->axisWidget( axis ),
SIGNAL( scaleDivChanged() ), SLOT( scaleDivChanged() ) );
}
d_data->plotWidgets[row * numColumns + col] = plot;
}
}
updateLayout();
}
PlotMatrix::~PlotMatrix()
{
delete d_data;
}
int PlotMatrix::numRows() const
{
const QGridLayout *l = qobject_cast<const QGridLayout *>( layout() );
if ( l )
return l->rowCount();
return 0;
}
int PlotMatrix::numColumns() const
{
const QGridLayout *l = qobject_cast<const QGridLayout *>( layout() );
if ( l )
return l->columnCount();
return 0;
}
QwtPlot* PlotMatrix::plotAt( int row, int column )
{
const int index = row * numColumns() + column;
if ( index < d_data->plotWidgets.size() )
return d_data->plotWidgets[index];
return NULL;
}
const QwtPlot* PlotMatrix::plotAt( int row, int column ) const
{
const int index = row * numColumns() + column;
if ( index < d_data->plotWidgets.size() )
return d_data->plotWidgets[index];
return NULL;
}
void PlotMatrix::enableAxis( int axis, bool tf )
{
if ( axis >= 0 && axis < QwtPlot::axisCnt )
{
if ( tf != d_data->isAxisEnabled[axis] )
{
d_data->isAxisEnabled[axis] = tf;
updateLayout();
}
}
}
bool PlotMatrix::axisEnabled( int axis ) const
{
if ( axis >= 0 && axis < QwtPlot::axisCnt )
return d_data->isAxisEnabled[axis];
return false;
}
void PlotMatrix::setAxisScale( int axis, int rowOrColumn,
double min, double max, double step )
{
int row = 0;
int col = 0;
if ( axis == QwtPlot::xBottom || axis == QwtPlot::xTop )
col = rowOrColumn;
else
row = rowOrColumn;
QwtPlot *plt = plotAt( row, col );
if ( plt )
{
plt->setAxisScale( axis, min, max, step );
plt->updateAxes();
}
}
void PlotMatrix::scaleDivChanged()
{
if ( d_data->inScaleSync )
return;
d_data->inScaleSync = true;
QwtPlot *plt = NULL;
int axisId = -1;
int rowOrColumn = -1;
// find the changed axis
for ( int row = 0; row < numRows(); row++ )
{
for ( int col = 0; col < numColumns(); col++ )
{
QwtPlot *p = plotAt( row, col );
if ( p )
{
for ( int axis = 0; axis < QwtPlot::axisCnt; axis++ )
{
if ( p->axisWidget( axis ) == sender() )
{
plt = p;
axisId = axis;
if ( axisId == QwtPlot::xBottom || axisId == QwtPlot::xTop )
rowOrColumn = col;
else
rowOrColumn = row;
}
}
}
}
}
if ( plt )
{
const QwtScaleDiv scaleDiv = plt->axisScaleDiv( axisId );
// synchronize the axes
if ( axisId == QwtPlot::xBottom || axisId == QwtPlot::xTop )
{
for ( int row = 0; row < numRows(); row++ )
{
QwtPlot *p = plotAt( row, rowOrColumn );
if ( p != plt )
{
p->setAxisScaleDiv( axisId, scaleDiv );
}
}
}
else
{
for ( int col = 0; col < numColumns(); col++ )
{
QwtPlot *p = plotAt( rowOrColumn, col );
if ( p != plt )
{
p->setAxisScaleDiv( axisId, scaleDiv );
}
}
}
updateLayout();
}
d_data->inScaleSync = false;
}
void PlotMatrix::updateLayout()
{
for ( int row = 0; row < numRows(); row++ )
{
for ( int col = 0; col < numColumns(); col++ )
{
QwtPlot *p = plotAt( row, col );
if ( p )
{
bool showAxis[QwtPlot::axisCnt];
showAxis[QwtPlot::xBottom] =
axisEnabled( QwtPlot::xBottom ) && row == numRows() - 1;
showAxis[QwtPlot::xTop] =
axisEnabled( QwtPlot::xTop ) && row == 0;
showAxis[QwtPlot::yLeft] =
axisEnabled( QwtPlot::yLeft ) && col == 0;
showAxis[QwtPlot::yRight] =
axisEnabled( QwtPlot::yRight ) && col == numColumns() - 1;
for ( int axis = 0; axis < QwtPlot::axisCnt; axis++ )
{
enablePlotAxis( p, axis, showAxis[axis] );
}
}
}
}
for ( int row = 0; row < numRows(); row++ )
{
alignAxes( row, QwtPlot::xTop );
alignAxes( row, QwtPlot::xBottom );
alignScaleBorder( row, QwtPlot::yLeft );
alignScaleBorder( row, QwtPlot::yRight );
}
for ( int col = 0; col < numColumns(); col++ )
{
alignAxes( col, QwtPlot::yLeft );
alignAxes( col, QwtPlot::yRight );
alignScaleBorder( col, QwtPlot::xBottom );
alignScaleBorder( col, QwtPlot::xTop );
}
for ( int row = 0; row < numRows(); row++ )
{
for ( int col = 0; col < numColumns(); col++ )
{
QwtPlot *p = plotAt( row, col );
if ( p )
p->replot();
}
}
}
void PlotMatrix::alignAxes( int rowOrColumn, int axis )
{
if ( axis == QwtPlot::yLeft || axis == QwtPlot::yRight )
{
double maxExtent = 0;
for ( int row = 0; row < numRows(); row++ )
{
QwtPlot *p = plotAt( row, rowOrColumn );
if ( p )
{
QwtScaleWidget *scaleWidget = p->axisWidget( axis );
QwtScaleDraw *sd = scaleWidget->scaleDraw();
sd->setMinimumExtent( 0.0 );
const double extent = sd->extent( scaleWidget->font() );
if ( extent > maxExtent )
maxExtent = extent;
}
}
for ( int row = 0; row < numRows(); row++ )
{
QwtPlot *p = plotAt( row, rowOrColumn );
if ( p )
{
QwtScaleWidget *scaleWidget = p->axisWidget( axis );
scaleWidget->scaleDraw()->setMinimumExtent( maxExtent );
}
}
}
else
{
double maxExtent = 0;
for ( int col = 0; col < numColumns(); col++ )
{
QwtPlot *p = plotAt( rowOrColumn, col );
if ( p )
{
QwtScaleWidget *scaleWidget = p->axisWidget( axis );
QwtScaleDraw *sd = scaleWidget->scaleDraw();
sd->setMinimumExtent( 0.0 );
const double extent = sd->extent( scaleWidget->font() );
if ( extent > maxExtent )
maxExtent = extent;
}
}
for ( int col = 0; col < numColumns(); col++ )
{
QwtPlot *p = plotAt( rowOrColumn, col );
if ( p )
{
QwtScaleWidget *scaleWidget = p->axisWidget( axis );
scaleWidget->scaleDraw()->setMinimumExtent( maxExtent );
}
}
}
}
void PlotMatrix::alignScaleBorder( int rowOrColumn, int axis )
{
int startDist = 0;
int endDist = 0;
if ( axis == QwtPlot::yLeft )
{
QwtPlot *plot = plotAt( rowOrColumn, 0 );
if ( plot )
plot->axisWidget( axis )->getBorderDistHint( startDist, endDist );
for ( int col = 1; col < numColumns(); col++ )
{
plot = plotAt( rowOrColumn, col );
if ( plot )
plot->axisWidget( axis )->setMinBorderDist( startDist, endDist );
}
}
else if ( axis == QwtPlot::yRight )
{
QwtPlot *plot = plotAt( rowOrColumn, numColumns() - 1 );
if ( plot )
plot->axisWidget( axis )->getBorderDistHint( startDist, endDist );
for ( int col = 0; col < numColumns() - 1; col++ )
{
plot = plotAt( rowOrColumn, col );
if ( plot )
plot->axisWidget( axis )->setMinBorderDist( startDist, endDist );
}
}
if ( axis == QwtPlot::xTop )
{
QwtPlot *plot = plotAt( rowOrColumn, 0 );
if ( plot )
plot->axisWidget( axis )->getBorderDistHint( startDist, endDist );
for ( int row = 1; row < numRows(); row++ )
{
plot = plotAt( row, rowOrColumn );
if ( plot )
plot->axisWidget( axis )->setMinBorderDist( startDist, endDist );
}
}
else if ( axis == QwtPlot::xBottom )
{
QwtPlot *plot = plotAt( numRows() - 1, rowOrColumn );
if ( plot )
plot->axisWidget( axis )->getBorderDistHint( startDist, endDist );
for ( int row = 0; row < numRows() - 1; row++ )
{
plot = plotAt( row, rowOrColumn );
if ( plot )
plot->axisWidget( axis )->setMinBorderDist( startDist, endDist );
}
}
}
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