// return raw(!) value of frontmost, active statistic item at given position
ValuePairList StatisticsObject::getValuesAt(int x, int y)
{
ValuePairList valueList;
for(int i=0; i<p_statsTypeList.count(); i++)
{
if (p_statsTypeList[i].render) // only show active values
{
int typeID = p_statsTypeList[i].typeID;
StatisticsItemList statsList = getStatistics(p_lastIdx, typeID);
if( statsList.size() == 0 && typeID == INT_INVALID ) // no active statistics
continue;
StatisticsType* aType = getStatisticsType(typeID);
Q_ASSERT(aType->typeID != INT_INVALID && aType->typeID == typeID);
// find item of this type at requested position
StatisticsItemList::iterator it;
bool foundStats = false;
for (it = statsList.begin(); it != statsList.end(); it++)
{
StatisticsItem anItem = *it;
QRect aRect = anItem.positionRect;
int rawValue1 = anItem.rawValues[0];
int rawValue2 = anItem.rawValues[1];
float vectorValue1 = anItem.vector[0];
float vectorValue2 = anItem.vector[1];
if( aRect.contains(x,y) )
{
if( anItem.type == blockType )
{
valueList.append( ValuePair(aType->typeName, QString::number(rawValue1)) );
}
else if( anItem.type == arrowType )
{
// TODO: do we also want to show the raw values?
valueList.append( ValuePair(QString("%1[x]").arg(aType->typeName), QString::number(vectorValue1)) );
valueList.append( ValuePair(QString("%1[y]").arg(aType->typeName), QString::number(vectorValue2)) );
}
foundStats = true;
}
}
if(!foundStats)
valueList.append( ValuePair(aType->typeName, "-") );
}
}
return valueList;
}
void statisticSource::drawStatisticsImage(QPixmap *img, StatisticsItemList statsList, StatisticsType statsType)
{
QPainter painter(img);
StatisticsItemList::iterator it;
for (it = statsList.begin(); it != statsList.end(); ++it)
{
StatisticsItem anItem = *it;
switch (anItem.type)
{
case arrowType:
{
QRect aRect = anItem.positionRect;
QRect displayRect = QRect(aRect.left()*p_internalScaleFactor, aRect.top()*p_internalScaleFactor, aRect.width()*p_internalScaleFactor, aRect.height()*p_internalScaleFactor);
int x, y;
// start vector at center of the block
x = displayRect.left() + displayRect.width() / 2;
y = displayRect.top() + displayRect.height() / 2;
QPoint startPoint = QPoint(x, y);
float vx = anItem.vector[0];
float vy = anItem.vector[1];
QPoint arrowBase = QPoint(x + p_internalScaleFactor*vx, y + p_internalScaleFactor*vy);
QColor arrowColor = anItem.color;
//arrowColor.setAlpha( arrowColor.alpha()*((float)statsType.alphaFactor / 100.0) );
QPen arrowPen(arrowColor);
painter.setPen(arrowPen);
painter.drawLine(startPoint, arrowBase);
if (vx == 0 && vy == 0)
{
// nothing to draw...
}
else
{
// draw an arrow
float nx, ny;
// TODO: scale arrow head with
float a = p_internalScaleFactor * 4; // length of arrow
float b = p_internalScaleFactor * 2; // base width of arrow
float n_abs = sqrtf(vx*vx + vy*vy);
float vxf = (float)vx / n_abs;
float vyf = (float)vy / n_abs;
QPoint arrowTip = arrowBase + QPoint(vxf*a + 0.5, vyf*a + 0.5);
// arrow head right
rotateVector((float)-M_PI_2, -vx, -vy, nx, ny);
QPoint offsetRight = QPoint(nx*b + 0.5, ny*b + 0.5);
QPoint arrowHeadRight = arrowBase + offsetRight;
// arrow head left
rotateVector((float)M_PI_2, -vx, -vy, nx, ny);
QPoint offsetLeft = QPoint(nx*b + 0.5, ny*b + 0.5);
QPoint arrowHeadLeft = arrowBase + offsetLeft;
// draw arrow head
QPoint points[3] = { arrowTip, arrowHeadRight, arrowHeadLeft };
painter.setBrush(arrowColor);
painter.drawPolygon(points, 3);
}
break;
}
case blockType:
{
//draw a rectangle
QColor rectColor = anItem.color;
rectColor.setAlpha(rectColor.alpha()*((float)statsType.alphaFactor / 100.0));
painter.setBrush(rectColor);
QRect aRect = anItem.positionRect;
QRect displayRect = QRect(aRect.left()*p_internalScaleFactor, aRect.top()*p_internalScaleFactor, aRect.width()*p_internalScaleFactor, aRect.height()*p_internalScaleFactor);
painter.fillRect(displayRect, rectColor);
break;
}
}
// optionally, draw a grid around the region
if (statsType.renderGrid) {
//draw a rectangle
QColor gridColor = anItem.gridColor;
QPen gridPen(gridColor);
gridPen.setWidth(1);
painter.setPen(gridPen);
painter.setBrush(QBrush(QColor(Qt::color0), Qt::NoBrush)); // no fill color
QRect aRect = anItem.positionRect;
QRect displayRect = QRect(aRect.left()*p_internalScaleFactor, aRect.top()*p_internalScaleFactor, aRect.width()*p_internalScaleFactor, aRect.height()*p_internalScaleFactor);
painter.drawRect(displayRect);
}
}
}
