void DataCurve::loadData()
{
Graph *g = (Graph *)plot();
if (!g)
return;
int xcol = d_x_table->colIndex(d_x_column);
int ycol = d_table->colIndex(title().text());
if (xcol < 0 || ycol < 0) {
remove();
return;
}
int rows = d_table->numRows();
if (d_end_row < 0 || d_end_row >= rows)
d_end_row = rows - 1;
int xColType = d_x_table->columnType(xcol);
int yColType = d_table->columnType(ycol);
int r = abs(d_end_row - d_start_row) + 1;
QPolygonF data;
data.reserve(r);
QStringList xLabels, yLabels;// store text labels
int xAxis = QwtPlot::xBottom;
if (d_type == Graph::HorizontalBars)
xAxis = QwtPlot::yLeft;
QString date_time_fmt = d_table->columnFormat(xcol);
int size = 0, from = 0;
d_data_ranges.clear();
for (int i = d_start_row; i <= d_end_row; i++ ) {
QString xval = d_x_table->text(i, xcol);
QString yval = d_table->text(i, ycol);
if (!xval.isEmpty() && !yval.isEmpty()) {
bool valid_data = true;
QPointF p;
if (xColType == Table::Text) {
xLabels << xval;
p.setX((double)(size + 1));
} else if (xColType == Table::Time)
p.setX(Table::fromTime(QTime::fromString(xval.trimmed(), date_time_fmt)));
else if (xColType == Table::Date)
p.setX(Table::fromDateTime(QDateTime::fromString(xval.trimmed(), date_time_fmt)));
else
p.setX(g->locale().toDouble(xval, &valid_data));
if (yColType == Table::Text) {
yLabels << yval;
p.setY((double)(size + 1));
} else
p.setY(g->locale().toDouble(yval, &valid_data));
if (valid_data) {
data << p;
size++;
}
} else if (from < size) {
DataRange range;
range.from = from;
range.to = size - 1;
d_data_ranges.push_back(range);
from = size;
}
}
if (d_data_ranges.size() && from < size) {
DataRange range;
range.from = from;
range.to = size - 1;
d_data_ranges.push_back(range);
}
if (!size) {
remove();
return;
}
data.resize(size);
if (g->isWaterfallPlot()) {
int index = g->curveIndex(this);
int curves = g->curveCount();
DataCurve *c = g->dataCurve(0);
if (index > 0 && c) {
double xmin = c->minXValue();
double dx = index*g->waterfallXOffset()*0.01*g->canvas()->width()/(double)(curves - 1);
d_x_offset = g->invTransform(xAxis, g->transform(xAxis, xmin) + dx) - xmin;
double ymin = c->minYValue();
double dy = index*g->waterfallYOffset()*0.01*g->canvas()->height()/(double)(curves - 1);
d_y_offset = ymin - g->invTransform(yAxis(), g->transform(yAxis(), ymin) + dy);
setZ(-index);
setBaseline(d_y_offset);
data.translate(d_x_offset, d_y_offset);
} else {
setZ(0);
setBaseline(0.0);
}
if (g->grid())
g->grid()->setZ(-g->curveCount() - 1);
}
double speedTol = g->getDouglasPeukerTolerance();
if (speedTol != 0.0 && size >= g->speedModeMaxPoints()) {
QwtWeedingCurveFitter *fitter = new QwtWeedingCurveFitter(speedTol);
data = fitter->fitCurve(data);
delete fitter;
}
if (d_type == Graph::HorizontalBars) {
size = data.size();
for (int i = 0; i < size; i++) {
QPointF p = data.at(i);
data[i] = QPointF(p.y(), p.x());
}
}
setData(data);
foreach(ErrorBarsCurve *c, d_error_bars)
c->setData(data);
if (xColType == Table::Text)
g->setLabelsTextFormat(xAxis, ScaleDraw::Text, d_x_column, xLabels);
if (yColType == Table::Text)
g->setLabelsTextFormat(QwtPlot::yLeft, ScaleDraw::Text, title().text(), yLabels);
setRenderHint(QwtPlotItem::RenderAntialiased, g->isCurveAntialiasingEnabled(this));
if (!d_labels_list.isEmpty()) {
((Graph*)plot())->updatePlot();
loadLabels();
}
}
