VectorPlot::VectorPlot(QWidget *parent, const QString &title, SetLegend * externalLegend)
: QWidget(parent), legend(externalLegend)
{
this->setMinimumHeight(200);
QwtText titleText(title);
QFont titleTextFont(titleText.font());
titleTextFont.setPointSize(10);
titleText.setFont(titleTextFont);
plot = new QwtPlot(titleText, this);
plot->setCanvasBackground(Qt::white);
//plot->setGeometry(ui.widget_plot->geometry());
plot->setAxisScale(QwtPlot::xBottom, 0, 0.01);
plot->setAxisScale(QwtPlot::yLeft, 0, 0.01);
for ( int i = 0; i < QwtPlot::axisCnt; i++ )
{
plot->setAxisAutoScale(i);
QwtScaleWidget *scaleWidget = (QwtScaleWidget *)plot->axisWidget(i);
if ( scaleWidget )
scaleWidget->setMargin(0);
QwtScaleDraw *scaleDraw = (QwtScaleDraw *)plot->axisScaleDraw(i);
if ( scaleDraw )
scaleDraw->enableComponent(QwtAbstractScaleDraw::Backbone, false);
}
plot->canvas()->setFrameStyle(QFrame::Box|QFrame::Plain);
plot->setAutoReplot(true);
//plot->setMinimumSize(QSize(200, 200));
//this->setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::MinimumExpanding);
plot->setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Ignored);
QPen pen(QColor(255, 0, 0));
marker1 = new QwtPlotMarker();
marker1->setLineStyle(QwtPlotMarker::VLine);
marker1->setLinePen(pen);
marker1->setXValue(0);
marker2 = new QwtPlotMarker();
marker2->setLineStyle(QwtPlotMarker::VLine);
marker2->setLinePen(pen);
marker2->setXValue(0);
zoomer = 0;
}
//
// Set a plain canvas frame and align the scales to it
//
void DataPlot::alignScales()
{
canvas()->setFrameStyle(QFrame::Box | QFrame::Plain );
canvas()->setLineWidth(1);
for ( int i = 0; i < QwtPlot::axisCnt; i++ )
{
QwtScaleWidget *scaleWidget = (QwtScaleWidget *)axisWidget(i);
if ( scaleWidget )
scaleWidget->setMargin(0);
QwtScaleDraw *scaleDraw = (QwtScaleDraw *)axisScaleDraw(i);
if ( scaleDraw )
scaleDraw->enableComponent(QwtAbstractScaleDraw::Backbone, false);
}
}
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 );
}
void XYZPlot::alignScales() {
// The code below shows how to align the scales to
// the canvas frame, but is also a good example demonstrating
// why the spreaded API needs polishing.
canvas()->setFrameStyle(QFrame::Box | QFrame::Plain);
canvas()->setLineWidth(1);
for (int i = 0; i < QwtPlot::axisCnt; i++) {
QwtScaleWidget *scaleWidget = (QwtScaleWidget *)axisWidget(i);
if (scaleWidget)
scaleWidget->setMargin(0);
QwtScaleDraw *scaleDraw = (QwtScaleDraw *)axisScaleDraw(i);
if (scaleDraw)
scaleDraw->enableComponent(QwtAbstractScaleDraw::Backbone, false);
}
}
//
// Set a plain canvas frame and align the scales to it
//
void Plotter::alignScales()
{
// The code below shows how to align the scales to
// the canvas frame, but is also a good example demonstrating
// why the spreaded API needs polishing.
for ( int i = 0; i < QwtPlot::axisCnt; i++ )
{
QwtScaleWidget *scaleWidget = axisWidget( i );
if ( scaleWidget )
scaleWidget->setMargin( 0 );
QwtScaleDraw *scaleDraw = axisScaleDraw( i );
if ( scaleDraw )
scaleDraw->enableComponent( QwtAbstractScaleDraw::Backbone, false );
}
plotLayout()->setAlignCanvasToScales( true );
}
/*!
\brief Paint the plot into a given rectangle.
Paint the contents of a QwtPlot instance into a given rectangle.
\param painter Painter
\param plotRect Bounding rectangle
\param pfilter Print filter
\sa QwtPlotPrintFilter
*/
void QwtPlot::print(QPainter *painter, const QRect &plotRect,
const QwtPlotPrintFilter &pfilter) const
{
int axisId;
if ( painter == 0 || !painter->isActive() ||
!plotRect.isValid() || size().isNull() )
return;
painter->save();
#if 1
/*
PDF: In Qt4 ( <= 4.3.2 ) the scales are painted in gray instead of
black. See http://trolltech.com/developer/task-tracker/index_html?id=184671&method=entry
The dummy lines below work around the problem.
*/
const QPen pen = painter->pen();
painter->setPen(QPen(Qt::black, 1));
painter->setPen(pen);
#endif
// All paint operations need to be scaled according to
// the paint device metrics.
QwtPainter::setMetricsMap(this, painter->device());
const QwtMetricsMap &metricsMap = QwtPainter::metricsMap();
// It is almost impossible to integrate into the Qt layout
// framework, when using different fonts for printing
// and screen. To avoid writing different and Qt unconform
// layout engines we change the widget attributes, print and
// reset the widget attributes again. This way we produce a lot of
// useless layout events ...
pfilter.apply((QwtPlot *)this);
int baseLineDists[QwtPlot::axisCnt];
if ( pfilter.options() & QwtPlotPrintFilter::PrintFrameWithScales ) {
for (axisId = 0; axisId < QwtPlot::axisCnt; axisId++ ) {
QwtScaleWidget *scaleWidget = (QwtScaleWidget *)axisWidget(axisId);
if ( scaleWidget ) {
baseLineDists[axisId] = scaleWidget->margin();
scaleWidget->setMargin(0);
}
}
}
// Calculate the layout for the print.
int layoutOptions = QwtPlotLayout::IgnoreScrollbars
| QwtPlotLayout::IgnoreFrames;
if ( !(pfilter.options() & QwtPlotPrintFilter::PrintMargin) )
layoutOptions |= QwtPlotLayout::IgnoreMargin;
if ( !(pfilter.options() & QwtPlotPrintFilter::PrintLegend) )
layoutOptions |= QwtPlotLayout::IgnoreLegend;
((QwtPlot *)this)->plotLayout()->activate(this,
QwtPainter::metricsMap().deviceToLayout(plotRect),
layoutOptions);
if ((pfilter.options() & QwtPlotPrintFilter::PrintTitle)
&& (!titleLabel()->text().isEmpty())) {
printTitle(painter, plotLayout()->titleRect());
}
if ( (pfilter.options() & QwtPlotPrintFilter::PrintLegend)
&& legend() && !legend()->isEmpty() ) {
printLegend(painter, plotLayout()->legendRect());
}
for ( axisId = 0; axisId < QwtPlot::axisCnt; axisId++ ) {
QwtScaleWidget *scaleWidget = (QwtScaleWidget *)axisWidget(axisId);
if (scaleWidget) {
int baseDist = scaleWidget->margin();
int startDist, endDist;
scaleWidget->getBorderDistHint(startDist, endDist);
printScale(painter, axisId, startDist, endDist,
baseDist, plotLayout()->scaleRect(axisId));
}
}
QRect canvasRect = plotLayout()->canvasRect();
/*
The border of the bounding rect needs to ba scaled to
layout coordinates, so that it is aligned to the axes
*/
QRect boundingRect( canvasRect.left() - 1, canvasRect.top() - 1,
canvasRect.width() + 2, canvasRect.height() + 2);
boundingRect = metricsMap.layoutToDevice(boundingRect);
boundingRect.setWidth(boundingRect.width() - 1);
boundingRect.setHeight(boundingRect.height() - 1);
canvasRect = metricsMap.layoutToDevice(canvasRect);
// When using QwtPainter all sizes where computed in pixel
// coordinates and scaled by QwtPainter later. This limits
// the precision to screen resolution. A better solution
// is to scale the maps and print in unlimited resolution.
QwtScaleMap map[axisCnt];
for (axisId = 0; axisId < axisCnt; axisId++) {
map[axisId].setTransformation(axisScaleEngine(axisId)->transformation());
const QwtScaleDiv &scaleDiv = *axisScaleDiv(axisId);
map[axisId].setScaleInterval(scaleDiv.lBound(), scaleDiv.hBound());
double from, to;
if ( axisEnabled(axisId) ) {
const int sDist = axisWidget(axisId)->startBorderDist();
const int eDist = axisWidget(axisId)->endBorderDist();
const QRect &scaleRect = plotLayout()->scaleRect(axisId);
if ( axisId == xTop || axisId == xBottom ) {
from = metricsMap.layoutToDeviceX(scaleRect.left() + sDist);
to = metricsMap.layoutToDeviceX(scaleRect.right() + 1 - eDist);
} else {
from = metricsMap.layoutToDeviceY(scaleRect.bottom() + 1 - eDist );
to = metricsMap.layoutToDeviceY(scaleRect.top() + sDist);
}
} else {
int margin = plotLayout()->canvasMargin(axisId);
if ( axisId == yLeft || axisId == yRight ) {
margin = metricsMap.layoutToDeviceY(margin);
from = canvasRect.bottom() - margin;
to = canvasRect.top() + margin;
} else {
margin = metricsMap.layoutToDeviceX(margin);
from = canvasRect.left() + margin;
to = canvasRect.right() - margin;
}
}
map[axisId].setPaintXInterval(from, to);
}
// The canvas maps are already scaled.
QwtPainter::setMetricsMap(painter->device(), painter->device());
printCanvas(painter, boundingRect, canvasRect, map, pfilter);
QwtPainter::resetMetricsMap();
((QwtPlot *)this)->plotLayout()->invalidate();
// reset all widgets with their original attributes.
if ( pfilter.options() & QwtPlotPrintFilter::PrintFrameWithScales ) {
// restore the previous base line dists
for (axisId = 0; axisId < QwtPlot::axisCnt; axisId++ ) {
QwtScaleWidget *scaleWidget = (QwtScaleWidget *)axisWidget(axisId);
if ( scaleWidget )
scaleWidget->setMargin(baseLineDists[axisId]);
}
}
pfilter.reset((QwtPlot *)this);
painter->restore();
}
Plot::Plot(QWidget *parent, const char *name)
: QwtPlot(parent)
{
marker_key = 0;
curve_key = 0;
minTickLength = 5;
majTickLength = 9;
movedGraph=FALSE;
graphToResize=FALSE;
ShiftButton=FALSE;
setGeometry(QRect(0,0,500,400));
setAxisTitle(QwtPlot::yLeft, tr("Y Axis Title"));
setAxisTitle(QwtPlot::xBottom, tr("X Axis Title"));
// grid
d_grid = new Grid;
d_grid->enableX(false);
d_grid->enableY(false);
d_grid->setMajPen(QPen(Qt::blue, 0, Qt::SolidLine));
d_grid->setMinPen(QPen(Qt::gray, 0 , Qt::DotLine));
d_grid->attach(this);
//custom scale
for (int i= 0; i<QwtPlot::axisCnt; i++)
{
QwtScaleWidget *scale = (QwtScaleWidget *) axisWidget(i);
if (scale)
{
scale->setMargin(0);
//the axis title color must be initialized
QwtText title = scale->title();
title.setColor(Qt::black);
scale->setTitle(title);
ScaleDraw *sd = new ScaleDraw();
sd->setTickLength (QwtScaleDiv::MinorTick, minTickLength);
sd->setTickLength (QwtScaleDiv::MediumTick, minTickLength);
sd->setTickLength (QwtScaleDiv::MajorTick, majTickLength);
setAxisScaleDraw (i, sd);
}
}
QwtPlotLayout *pLayout=plotLayout();
pLayout->setCanvasMargin(0);
QwtPlotCanvas* plCanvas = canvas();
plCanvas->setFocusPolicy(QWidget::StrongFocus);
plCanvas->setFocusIndicator(QwtPlotCanvas::ItemFocusIndicator);
plCanvas->setFocus();
plCanvas->setFrameShadow(QwtPlot::Plain);
plCanvas->setCursor(Qt::arrowCursor);
plCanvas->setLineWidth(0);
setFocusPolicy(QWidget::StrongFocus);
setFocusProxy(plCanvas);
setFrameShape (QFrame::Box);
setLineWidth(0);
}
Plot::Plot(int width, int height, QWidget *parent, const char *)
: QwtPlot(parent)
{
setAutoReplot (false);
marker_key = 0;
curve_key = 0;
minTickLength = 5;
majTickLength = 9;
setGeometry(QRect(0, 0, width, height));
setAxisTitle(QwtPlot::yLeft, tr("Y Axis Title"));
setAxisTitle(QwtPlot::xBottom, tr("X Axis Title"));
//due to the plot layout updates, we must always have a non empty title
setAxisTitle(QwtPlot::yRight, tr(" "));
setAxisTitle(QwtPlot::xTop, tr(" "));
// grid
d_grid = new Grid();
d_grid->attach(this);
//custom scale
for (int i= 0; i<QwtPlot::axisCnt; i++) {
QwtScaleWidget *scale = (QwtScaleWidget *) axisWidget(i);
if (scale) {
scale->setMargin(0);
//the axis title color must be initialized...
QwtText title = scale->title();
title.setColor(Qt::black);
scale->setTitle(title);
//...same for axis color
QPalette pal = scale->palette();
pal.setColor(QPalette::Foreground, QColor(Qt::black));
scale->setPalette(pal);
ScaleDraw *sd = new ScaleDraw(this);
sd->setTickLength(QwtScaleDiv::MinorTick, minTickLength);
sd->setTickLength(QwtScaleDiv::MediumTick, minTickLength);
sd->setTickLength(QwtScaleDiv::MajorTick, majTickLength);
setAxisScaleDraw (i, sd);
setAxisScaleEngine (i, new ScaleEngine());
}
}
QwtPlotLayout *pLayout = plotLayout();
pLayout->setCanvasMargin(0);
pLayout->setAlignCanvasToScales (true);
QwtPlotCanvas* plCanvas = canvas();
plCanvas->setFocusPolicy(Qt::StrongFocus);
plCanvas->setFocusIndicator(QwtPlotCanvas::ItemFocusIndicator);
//plCanvas->setFocus();
plCanvas->setFrameShadow(QwtPlot::Plain);
plCanvas->setCursor(Qt::arrowCursor);
plCanvas->setLineWidth(0);
plCanvas->setPaintAttribute(QwtPlotCanvas::PaintCached, false);
plCanvas->setPaintAttribute(QwtPlotCanvas::PaintPacked, false);
QColor background = QColor(Qt::white);
background.setAlpha(255);
QPalette palette;
palette.setColor(QPalette::Window, background);
setPalette(palette);
setCanvasBackground (background);
setFocusPolicy(Qt::StrongFocus);
//setFocusProxy(plCanvas);
setFrameShape(QFrame::Box);
setLineWidth(0);
}
Plot::Plot(QWidget *parent):
QwtPlot(parent)
{
setTitle("Interactive Plot");
setCanvasColor(Qt::darkCyan);
QwtPlotGrid *grid = new QwtPlotGrid;
grid->setMajPen(QPen(Qt::white, 0, Qt::DotLine));
grid->attach(this);
// axes
setAxisScale(QwtPlot::xBottom, 0.0, 100.0);
setAxisScale(QwtPlot::yLeft, 0.0, 100.0);
// Avoid jumping when label with 3 digits
// appear/disappear when scrolling vertically
QwtScaleDraw *sd = axisScaleDraw(QwtPlot::yLeft);
sd->setMinimumExtent( sd->extent(axisWidget(QwtPlot::yLeft)->font()));
plotLayout()->setAlignCanvasToScales(true);
insertCurve(Qt::Vertical, Qt::blue, 30.0);
insertCurve(Qt::Vertical, Qt::magenta, 70.0);
insertCurve(Qt::Horizontal, Qt::yellow, 30.0);
insertCurve(Qt::Horizontal, Qt::white, 70.0);
replot();
// ------------------------------------
// We add a color bar to the left axis
// ------------------------------------
QwtScaleWidget *scaleWidget = (QwtScaleWidget *)axisWidget(yLeft);
scaleWidget->setMargin(10); // area for the color bar
d_colorBar = new ColorBar(Qt::Vertical, scaleWidget);
d_colorBar->setRange(Qt::red, Qt::darkBlue);
d_colorBar->setFocusPolicy(Qt::TabFocus);
connect(d_colorBar, SIGNAL(selected(const QColor &)),
SLOT(setCanvasColor(const QColor &)));
// we need the resize events, to lay out the color bar
scaleWidget->installEventFilter(this);
// ------------------------------------
// We add a wheel to the canvas
// ------------------------------------
d_wheel = new QwtWheel(canvas());
d_wheel->setOrientation(Qt::Vertical);
d_wheel->setRange(-100, 100);
d_wheel->setValue(0.0);
d_wheel->setMass(0.2);
d_wheel->setTotalAngle(4 * 360.0);
connect(d_wheel, SIGNAL(valueChanged(double)),
SLOT(scrollLeftAxis(double)));
// we need the resize events, to lay out the wheel
canvas()->installEventFilter(this);
d_colorBar->setWhatsThis(
"Selecting a color will change the background of the plot.");
scaleWidget->setWhatsThis(
"Selecting a value at the scale will insert a new curve.");
d_wheel->setWhatsThis(
"With the wheel you can move the visible area.");
axisWidget(xBottom)->setWhatsThis(
"Selecting a value at the scale will insert a new curve.");
}
/*!
Paint the contents of a QwtPlot instance into a given rectangle.
\param plot Plot to be rendered
\param painter Painter
\param plotRect Bounding rectangle
\sa renderDocument(), renderTo(), QwtPainter::setRoundingAlignment()
*/
void QwtPlotRenderer::render( QwtPlot *plot,
QPainter *painter, const QRectF &plotRect ) const
{
int axisId;
if ( painter == 0 || !painter->isActive() ||
!plotRect.isValid() || plot->size().isNull() )
return;
if ( !( d_data->discardFlags & DiscardBackground ) )
qwtRenderBackground( painter, plotRect, plot );
/*
The layout engine uses the same methods as they are used
by the Qt layout system. Therefore we need to calculate the
layout in screen coordinates and paint with a scaled painter.
*/
QTransform transform;
transform.scale(
double( painter->device()->logicalDpiX() ) / plot->logicalDpiX(),
double( painter->device()->logicalDpiY() ) / plot->logicalDpiY() );
QRectF layoutRect = transform.inverted().mapRect( plotRect );
if ( !( d_data->discardFlags & DiscardBackground ) )
{
// subtract the contents margins
int left, top, right, bottom;
plot->getContentsMargins( &left, &top, &right, &bottom );
layoutRect.adjust( left, top, -right, -bottom );
}
int baseLineDists[QwtPlot::axisCnt];
if ( d_data->layoutFlags & FrameWithScales )
{
for ( axisId = 0; axisId < QwtPlot::axisCnt; axisId++ )
{
QwtScaleWidget *scaleWidget = plot->axisWidget( axisId );
if ( scaleWidget )
{
baseLineDists[axisId] = scaleWidget->margin();
scaleWidget->setMargin( 0 );
}
if ( !plot->axisEnabled( axisId ) )
{
int left = 0;
int right = 0;
int top = 0;
int bottom = 0;
// When we have a scale the frame is painted on
// the position of the backbone - otherwise we
// need to introduce a margin around the canvas
switch( axisId )
{
case QwtPlot::yLeft:
layoutRect.adjust( 1, 0, 0, 0 );
break;
case QwtPlot::yRight:
layoutRect.adjust( 0, 0, -1, 0 );
break;
case QwtPlot::xTop:
layoutRect.adjust( 0, 1, 0, 0 );
break;
case QwtPlot::xBottom:
layoutRect.adjust( 0, 0, 0, -1 );
break;
default:
break;
}
layoutRect.adjust( left, top, right, bottom );
}
}
}
// Calculate the layout for the document.
QwtPlotLayout::Options layoutOptions =
QwtPlotLayout::IgnoreScrollbars | QwtPlotLayout::IgnoreFrames;
if ( d_data->discardFlags & DiscardLegend )
layoutOptions |= QwtPlotLayout::IgnoreLegend;
plot->plotLayout()->activate( plot, layoutRect, layoutOptions );
// now start painting
painter->save();
painter->setWorldTransform( transform, true );
// canvas
QwtScaleMap maps[QwtPlot::axisCnt];
buildCanvasMaps( plot, plot->plotLayout()->canvasRect(), maps );
renderCanvas( plot, painter, plot->plotLayout()->canvasRect(), maps );
if ( !( d_data->discardFlags & DiscardTitle )
&& ( !plot->titleLabel()->text().isEmpty() ) )
{
renderTitle( plot, painter, plot->plotLayout()->titleRect() );
}
if ( !( d_data->discardFlags & DiscardLegend )
&& plot->legend() && !plot->legend()->isEmpty() )
{
renderLegend( plot, painter, plot->plotLayout()->legendRect() );
}
for ( axisId = 0; axisId < QwtPlot::axisCnt; axisId++ )
{
QwtScaleWidget *scaleWidget = plot->axisWidget( axisId );
if ( scaleWidget )
{
int baseDist = scaleWidget->margin();
int startDist, endDist;
scaleWidget->getBorderDistHint( startDist, endDist );
renderScale( plot, painter, axisId, startDist, endDist,
baseDist, plot->plotLayout()->scaleRect( axisId ) );
}
}
plot->plotLayout()->invalidate();
// reset all widgets with their original attributes.
if ( d_data->layoutFlags & FrameWithScales )
{
// restore the previous base line dists
for ( axisId = 0; axisId < QwtPlot::axisCnt; axisId++ )
{
QwtScaleWidget *scaleWidget = plot->axisWidget( axisId );
if ( scaleWidget )
scaleWidget->setMargin( baseLineDists[axisId] );
}
}
painter->restore();
}
/*!
Paint the contents of a QwtPlot instance into a given rectangle.
\param plot Plot to be rendered
\param painter Painter
\param plotRect Bounding rectangle
\sa renderDocument(), renderTo(), QwtPainter::setRoundingAlignment()
*/
void QwtPlotRenderer::render( QwtPlot *plot,
QPainter *painter, const QRectF &plotRect ) const
{
int axisId;
if ( painter == 0 || !painter->isActive() ||
!plotRect.isValid() || plot->size().isNull() )
return;
if ( !( d_data->discardFlags & DiscardBackground ) )
qwtRenderBackground( painter, plotRect, plot );
/*
The layout engine uses the same methods as they are used
by the Qt layout system. Therefore we need to calculate the
layout in screen coordinates and paint with a scaled painter.
*/
QTransform transform;
transform.scale(
double( painter->device()->logicalDpiX() ) / plot->logicalDpiX(),
double( painter->device()->logicalDpiY() ) / plot->logicalDpiY() );
painter->save();
int baseLineDists[QwtPlot::axisCnt];
if ( d_data->layoutFlags & FrameWithScales )
{
for ( axisId = 0; axisId < QwtPlot::axisCnt; axisId++ )
{
QwtScaleWidget *scaleWidget = plot->axisWidget( axisId );
if ( scaleWidget )
{
baseLineDists[axisId] = scaleWidget->margin();
scaleWidget->setMargin( 0 );
}
}
}
// Calculate the layout for the print.
QwtPlotLayout::Options layoutOptions =
QwtPlotLayout::IgnoreScrollbars | QwtPlotLayout::IgnoreFrames;
if ( d_data->discardFlags & DiscardLegend )
layoutOptions |= QwtPlotLayout::IgnoreLegend;
const QRectF layoutRect = transform.inverted().mapRect( plotRect );
plot->plotLayout()->activate( plot, layoutRect, layoutOptions );
painter->setWorldTransform( transform, true );
// canvas
QwtScaleMap maps[QwtPlot::axisCnt];
buildCanvasMaps( plot, plot->plotLayout()->canvasRect(), maps );
renderCanvas( plot, painter, plot->plotLayout()->canvasRect(), maps );
if ( !( d_data->discardFlags & DiscardTitle )
&& ( !plot->titleLabel()->text().isEmpty() ) )
{
renderTitle( plot, painter, plot->plotLayout()->titleRect() );
}
if ( !( d_data->discardFlags & DiscardLegend )
&& plot->legend() && !plot->legend()->isEmpty() )
{
renderLegend( plot, painter, plot->plotLayout()->legendRect() );
}
for ( axisId = 0; axisId < QwtPlot::axisCnt; axisId++ )
{
QwtScaleWidget *scaleWidget = plot->axisWidget( axisId );
if ( scaleWidget )
{
int baseDist = scaleWidget->margin();
int startDist, endDist;
scaleWidget->getBorderDistHint( startDist, endDist );
renderScale( plot, painter, axisId, startDist, endDist,
baseDist, plot->plotLayout()->scaleRect( axisId ) );
}
}
plot->plotLayout()->invalidate();
// reset all widgets with their original attributes.
if ( d_data->layoutFlags & FrameWithScales )
{
// restore the previous base line dists
for ( axisId = 0; axisId < QwtPlot::axisCnt; axisId++ )
{
QwtScaleWidget *scaleWidget = plot->axisWidget( axisId );
if ( scaleWidget )
scaleWidget->setMargin( baseLineDists[axisId] );
}
}
painter->restore();
}
/*!
\brief Paint the plot into a given rectangle.
Paint the contents of a QwtPlot instance into a given rectangle (Qwt modified code).
\param painter Painter
\param plotRect Bounding rectangle
\param pfilter Print filter
*/
void Plot::print(QPainter *painter, const QRect &plotRect,
const QwtPlotPrintFilter &pfilter)
{
int axisId;
if ( painter == 0 || !painter->isActive() ||
!plotRect.isValid() || size().isNull() )
return;
QwtText t = title();
printFrame(painter, plotRect);
painter->save();
// All paint operations need to be scaled according to
// the paint device metrics.
QwtPainter::setMetricsMap(this, painter->device());
const QwtMetricsMap &metricsMap = QwtPainter::metricsMap();
// It is almost impossible to integrate into the Qt layout
// framework, when using different fonts for printing
// and screen. To avoid writing different and Qt unconform
// layout engines we change the widget attributes, print and
// reset the widget attributes again. This way we produce a lot of
// useless layout events ...
pfilter.apply((QwtPlot *)this);
int baseLineDists[QwtPlot::axisCnt];
if ( !(pfilter.options() & QwtPlotPrintFilter::PrintCanvasBackground) ){
// In case of no background we set the backbone of
// the scale on the frame of the canvas.
for (axisId = 0; axisId < QwtPlot::axisCnt; axisId++ ){
QwtScaleWidget *scaleWidget = (QwtScaleWidget *)axisWidget(axisId);
if ( scaleWidget ){
baseLineDists[axisId] = scaleWidget->margin();
scaleWidget->setMargin(0);
}
}
}
// Calculate the layout for the print.
int layoutOptions = QwtPlotLayout::IgnoreScrollbars
| QwtPlotLayout::IgnoreFrames;
if ( !(pfilter.options() & QwtPlotPrintFilter::PrintMargin) )
layoutOptions |= QwtPlotLayout::IgnoreMargin;
if ( !(pfilter.options() & QwtPlotPrintFilter::PrintLegend) )
layoutOptions |= QwtPlotLayout::IgnoreLegend;
((QwtPlot *)this)->plotLayout()->activate(this,
QwtPainter::metricsMap().deviceToLayout(plotRect),
layoutOptions);
if ((pfilter.options() & QwtPlotPrintFilter::PrintTitle)
&& (!titleLabel()->text().isEmpty())){
printTitle(painter, plotLayout()->titleRect());
}
QRect canvasRect = plotLayout()->canvasRect();
for ( axisId = 0; axisId < QwtPlot::axisCnt; axisId++ ){
QwtScaleWidget *scaleWidget = (QwtScaleWidget *)axisWidget(axisId);
if (scaleWidget){
int baseDist = scaleWidget->margin();
int startDist, endDist;
scaleWidget->getBorderDistHint(startDist, endDist);
QRect scaleRect = plotLayout()->scaleRect(axisId);
if (!scaleWidget->margin()){
switch(axisId){
case xBottom:
scaleRect.translate(0, canvasRect.bottom() - scaleRect.top());
break;
case xTop:
scaleRect.translate(0, canvasRect.top() - scaleRect.bottom());
break;
case yLeft:
scaleRect.translate(canvasRect.left() - scaleRect.right(), 0);
break;
case yRight:
scaleRect.translate(canvasRect.right() - scaleRect.left(), 0);
break;
}
}
printScale(painter, axisId, startDist, endDist, baseDist, scaleRect);
}
}
if ( !(pfilter.options() & QwtPlotPrintFilter::PrintCanvasBackground) )
{
QRect boundingRect(
canvasRect.left() - 1, canvasRect.top() - 1,
canvasRect.width() + 2, canvasRect.height() + 2);
boundingRect = metricsMap.layoutToDevice(boundingRect);
boundingRect.setWidth(boundingRect.width() - 1);
boundingRect.setHeight(boundingRect.height() - 1);
painter->setPen(QPen(Qt::black));
painter->setBrush(QBrush(Qt::NoBrush));
painter->drawRect(boundingRect);
}
canvasRect = metricsMap.layoutToDevice(canvasRect);
// When using QwtPainter all sizes where computed in pixel
// coordinates and scaled by QwtPainter later. This limits
// the precision to screen resolution. A much better solution
// is to scale the maps and print in unlimited resolution.
QwtScaleMap map[axisCnt];
for (axisId = 0; axisId < axisCnt; axisId++){
map[axisId].setTransformation(axisScaleEngine(axisId)->transformation());
const QwtScaleDiv &scaleDiv = *axisScaleDiv(axisId);
map[axisId].setScaleInterval(scaleDiv.lBound(), scaleDiv.hBound());
double from, to;
if ( axisEnabled(axisId) ){
const int sDist = axisWidget(axisId)->startBorderDist();
const int eDist = axisWidget(axisId)->endBorderDist();
const QRect &scaleRect = plotLayout()->scaleRect(axisId);
if ( axisId == xTop || axisId == xBottom ){
from = metricsMap.layoutToDeviceX(scaleRect.left() + sDist);
to = metricsMap.layoutToDeviceX(scaleRect.right() + 1 - eDist);
} else {
from = metricsMap.layoutToDeviceY(scaleRect.bottom() + 1 - eDist );
to = metricsMap.layoutToDeviceY(scaleRect.top() + sDist);
}
} else {
const int margin = plotLayout()->canvasMargin(axisId);
if ( axisId == yLeft || axisId == yRight ){
from = metricsMap.layoutToDeviceX(canvasRect.bottom() - margin);
to = metricsMap.layoutToDeviceX(canvasRect.top() + margin);
} else {
from = metricsMap.layoutToDeviceY(canvasRect.left() + margin);
to = metricsMap.layoutToDeviceY(canvasRect.right() - margin);
}
}
map[axisId].setPaintXInterval(from, to);
}
// The canvas maps are already scaled.
QwtPainter::setMetricsMap(painter->device(), painter->device());
printCanvas(painter, canvasRect, map, pfilter);
QwtPainter::resetMetricsMap();
((QwtPlot *)this)->plotLayout()->invalidate();
// reset all widgets with their original attributes.
if ( !(pfilter.options() & QwtPlotPrintFilter::PrintCanvasBackground) ){
// restore the previous base line dists
for (axisId = 0; axisId < QwtPlot::axisCnt; axisId++ ){
QwtScaleWidget *scaleWidget = (QwtScaleWidget *)axisWidget(axisId);
if ( scaleWidget )
scaleWidget->setMargin(baseLineDists[axisId]);
}
}
pfilter.reset((QwtPlot *)this);
painter->restore();
setTitle(t);//hack used to avoid bug in Qwt::printTitle(): the title attributes are overwritten
}
/*!
Paint the contents of a QwtPlot instance into a given rectangle.
\param plot Plot to be rendered
\param painter Painter
\param plotRect Bounding rectangle
\sa renderDocument(), renderTo(), QwtPainter::setRoundingAlignment()
*/
void QwtPlotRenderer::render( QwtPlot *plot,
QPainter *painter, const QRectF &plotRect ) const
{
if ( painter == 0 || !painter->isActive() ||
!plotRect.isValid() || plot->size().isNull() )
{
return;
}
if ( !( d_data->discardFlags & DiscardBackground ) )
QwtPainter::drawBackgound( painter, plotRect, plot );
/*
The layout engine uses the same methods as they are used
by the Qt layout system. Therefore we need to calculate the
layout in screen coordinates and paint with a scaled painter.
*/
QTransform transform;
transform.scale(
double( painter->device()->logicalDpiX() ) / plot->logicalDpiX(),
double( painter->device()->logicalDpiY() ) / plot->logicalDpiY() );
QRectF layoutRect = transform.inverted().mapRect( plotRect );
if ( !( d_data->discardFlags & DiscardBackground ) )
{
// subtract the contents margins
int left, top, right, bottom;
plot->getContentsMargins( &left, &top, &right, &bottom );
layoutRect.adjust( left, top, -right, -bottom );
}
QwtPlotLayout *layout = plot->plotLayout();
int baseLineDists[QwtAxis::PosCount];
int canvasMargins[QwtAxis::PosCount];
for ( int axisPos = 0; axisPos < QwtAxis::PosCount; axisPos++ )
{
canvasMargins[ axisPos ] = layout->canvasMargin( axisPos );
if ( d_data->layoutFlags & FrameWithScales )
{
const QwtAxisId axisId( axisPos, QWT_DUMMY_ID );
QwtScaleWidget *scaleWidget = plot->axisWidget( axisId );
if ( scaleWidget )
{
baseLineDists[ axisPos ] = scaleWidget->margin();
scaleWidget->setMargin( 0 );
}
if ( !plot->isAxisVisible( axisId ) )
{
int left = 0;
int right = 0;
int top = 0;
int bottom = 0;
// When we have a scale the frame is painted on
// the position of the backbone - otherwise we
// need to introduce a margin around the canvas
switch( axisPos )
{
case QwtAxis::yLeft:
layoutRect.adjust( 1, 0, 0, 0 );
break;
case QwtAxis::yRight:
layoutRect.adjust( 0, 0, -1, 0 );
break;
case QwtAxis::xTop:
layoutRect.adjust( 0, 1, 0, 0 );
break;
case QwtAxis::xBottom:
layoutRect.adjust( 0, 0, 0, -1 );
break;
}
layoutRect.adjust( left, top, right, bottom );
}
}
}
// Calculate the layout for the document.
QwtPlotLayout::Options layoutOptions = QwtPlotLayout::IgnoreScrollbars;
if ( ( d_data->layoutFlags & FrameWithScales ) ||
( d_data->discardFlags & DiscardCanvasFrame ) )
{
layoutOptions |= QwtPlotLayout::IgnoreFrames;
}
if ( d_data->discardFlags & DiscardLegend )
layoutOptions |= QwtPlotLayout::IgnoreLegend;
if ( d_data->discardFlags & DiscardTitle )
layoutOptions |= QwtPlotLayout::IgnoreTitle;
if ( d_data->discardFlags & DiscardFooter )
layoutOptions |= QwtPlotLayout::IgnoreFooter;
layout->update( plot, layoutRect, layoutOptions );
// canvas
QwtScaleMapTable mapTable = buildCanvasMaps( plot, layout->canvasRect() );
if ( updateCanvasMargins( plot, layout->canvasRect(), mapTable ) )
{
// recalculate maps and layout, when the margins
// have been changed
layout->update( plot, layoutRect, layoutOptions );
mapTable = buildCanvasMaps( plot, layout->canvasRect() );
}
// now start painting
painter->save();
painter->setWorldTransform( transform, true );
renderCanvas( plot, painter, layout->canvasRect(), mapTable );
if ( !( d_data->discardFlags & DiscardTitle )
&& ( !plot->titleLabel()->text().isEmpty() ) )
{
renderTitle( plot, painter, layout->titleRect() );
}
if ( !( d_data->discardFlags & DiscardFooter )
&& ( !plot->footerLabel()->text().isEmpty() ) )
{
renderFooter( plot, painter, layout->footerRect() );
}
if ( !( d_data->discardFlags & DiscardLegend )
&& plot->legend() && !plot->legend()->isEmpty() )
{
renderLegend( plot, painter, layout->legendRect() );
}
for ( int axisPos = 0; axisPos < QwtAxis::PosCount; axisPos++ )
{
for ( int i = 0; i < plot->axesCount( i ); i++ )
{
const QwtAxisId axisId( axisPos, i );
QwtScaleWidget *scaleWidget = plot->axisWidget( axisId );
if ( scaleWidget )
{
int baseDist = scaleWidget->margin();
int startDist, endDist;
scaleWidget->getBorderDistHint( startDist, endDist );
renderScale( plot, painter, axisId, startDist, endDist,
baseDist, layout->scaleRect( axisId ) );
}
}
}
painter->restore();
// restore all setting to their original attributes.
for ( int axisPos = 0; axisPos < QwtAxis::PosCount; axisPos++ )
{
if ( d_data->layoutFlags & FrameWithScales )
{
const QwtAxisId axisId( axisPos, QWT_DUMMY_ID );
QwtScaleWidget *scaleWidget = plot->axisWidget( axisId );
if ( scaleWidget )
scaleWidget->setMargin( baseLineDists[axisPos] );
}
layout->setCanvasMargin( canvasMargins[axisPos] );
}
layout->invalidate();
}
