void GeoMapWidget::paintEvent( QPaintEvent* )
{
uint w = width();
uint h = height();
QPixmap pm( w, h );
QPainter p;
p.begin( &pm );
p.initFrom( this );
p.setPen( QColor( 255, 0, 0 ) );
p.setBrush( QColor( 255, 0, 0 ) );
QPixmap world( KStandardDirs::locate( "data", "kaddressbook/pics/world.jpg" ) );
p.drawPixmap( 0, 0, world );
double latMid = h / 2;
double longMid = w / 2;
double latOffset = ( mLatitude * latMid ) / 90;
double longOffset = ( mLongitude * longMid ) / 180;
int x = (int)(longMid + longOffset);
int y = (int)(latMid - latOffset);
p.drawEllipse( x, y, 4, 4 );
p.end();
QPainter thisPainter(this);
thisPainter.drawPixmap( 0, 0, pm );
}
void ParallelCoordinates::paintEvent( QPaintEvent* evtPaint )
{
// ------------------------------------------------------------------------
// ------------------------------------------------------------------------
QPainter thisPainter(this);
int w = thisPainter.viewport().width();
int h = thisPainter.viewport().height();
if( (abs(m_nHeight-h) > 0 || abs(m_nWidth-w) > 0) && m_data.size() > 0 )
{
m_nHeight = h;
m_nWidth = w;
delete m_chart;
m_chart = new QPixmap(w, h);
QPainter painter(m_chart);
// Draw the background.
QPoint background[4] = { QPoint(0,0), QPoint(0,h), QPoint(w,h), QPoint(w,0) };
QBrush brush(QColor(20,128,230));
QBrush oldBrush = painter.brush();
painter.setBrush(brush);
painter.drawPolygon( background, 4 );
painter.setBrush(oldBrush);
painter.setPen(Qt::green);
Data::FlightDatabase::iterator i;
int nFlights = m_data.size();
int nFlightNum = -1;
int nLineLength = h/(nFlights);
for( i = m_data.begin() ; i != m_data.end(); ++i )
{
painter.setPen(Qt::green);
++nFlightNum;
int nAttr = i.value()._metadata.size();
if( nAttr > 1 )
{
# ifdef NDEBUG
// This makes the drawing VERY slow!!!
//painter.setRenderHint(QPainter::Antialiasing);
# endif
this->setStyleSheet("QWidget { background-color: blue; }");
QPoint *points = new QPoint[nAttr];
// Calculate the chart parameters.
int nLineSpacing = w/(nAttr-1);
int xoffset = 0;
int yoffset = nLineLength*(nFlightNum+1);
int xIncrements = 0;
int yIncrements = 0;
bool success = false;
for( int g = 0; g < i.value()._params.size(); g+=10 )
{
int pt = 0;
int x = xoffset;
int y = 0;
for( int j = 0; j < i.value()._params[g]._dataVector.size(); ++j )
{
const qreal& data = i.value()._params[g]._dataVector[j].toDouble(&success);
y = data * nLineLength;
points[pt].setX(x);
points[pt].setY(yoffset-y);
pt++;
x += nLineSpacing;
}
painter.drawPolyline(points, nAttr);
}
// Draw the actual parallel coordinates last so they are visible on top.
painter.setPen(Qt::black);
for( int m = 0; m < nAttr; ++m )
{
int x = xoffset+(nLineSpacing*m);
painter.drawLine( x, yoffset, x, yoffset-nLineLength);
}
painter.drawLine
( xoffset, yoffset
, xoffset+(nLineSpacing*nAttr), yoffset);
painter.drawLine
( xoffset, yoffset+nLineLength
, xoffset+(nLineSpacing*nAttr), yoffset+nLineLength);
delete points;
}
}
}
if( m_chart )
{
// Draw the pixmap to the widget.
thisPainter.drawPixmap(m_chart->rect(), *m_chart);
}
// else
// {
// // QStaticText isn't available until 4.7
//# if QT_VERSION >= 0x040700
// // Draw some reminder text for now on how to get the chart to work.
// QStaticText message;
//
// message.setText(
// "Parallel coordinates requires loading data and selecting at least two attributes.\n"
// "Make sure data is loaded, select two attributes and then re-launch the chart.");
//
// painter.drawStaticText( 0, 0, message );
//# endif
// }
}
