// Add point to scale
ColourScalePoint* ColourScale::addPoint(double value, QColor colour)
{
ColourScalePoint* csp = NULL;
// If supplied value is less than that at the start of the list, add it at the beginning.
// If larget than the one at the end, then append it to the end of the list.
// If neither of these, find the first existing value which is larger, and add it before that one
if (points_.nItems() == 0) csp = points_.add();
else if (value > points_.last()->value()) csp = points_.add();
else for (ColourScalePoint* oldPoint = points_.first(); oldPoint != NULL; oldPoint = oldPoint->next) if (oldPoint->value() > value)
{
csp = points_.insertBefore(oldPoint);
break;
}
if (csp == NULL) return NULL;
// Now, set data in new point
csp->setColour(colour);
csp->setValue(value);
// Recalculate colour deltas
calculateDeltas();
return csp;
}
// Set all alpha values to that specified
void ColourScale::setAllAlpha(double alpha)
{
QColor color;
for (ColourScalePoint* csp = points_.first(); csp != NULL; csp = csp->next)
{
color = csp->colour();
int alphai = alpha*255;
if (alphai < 0) alphai = 0;
else if (alphai > 255) alphai = 255;
color.setAlpha(alphai);
csp->setColour(color);
}
calculateDeltas();
}
// Add point to scale
ColourScalePoint* ColourScale::addPoint(double value, double r, double g, double b, double a)
{
Messenger::enter("ColourScale::addPoint");
// Find position to insert new point at
ColourScalePoint* newPoint = NULL;
if (points_.nItems() == 0) newPoint = points_.add();
else if (value < points_.first()->value()) newPoint = points_.prepend();
else if (value > points_.last()->value()) newPoint = points_.add();
else
{
for (ColourScalePoint* point = points_.first()->next; point != NULL; point = point->next)
{
if (value < point->value())
{
newPoint = points_.insertBefore(point);
break;
}
}
}
// Double-check we have a new point
if (!newPoint)
{
printf("Internal Error: ColourScale::addPoint() failed to add a point.\n");
return NULL;
}
// Now, set data in new point
newPoint->setParent(this);
newPoint->setColour(r, g, b, a);
newPoint->setValue(value);
// Recalculate colour deltas
calculateDeltas();
// Refresh linked objects
refreshObjects();
Messenger::exit("ColourScale::addPoint");
return newPoint;
}
