void DataCurve::clearLabels()
{
if (!validCurveType())
return;
foreach(PlotMarker *m, d_labels_list){
m->detach();
delete m;
}
void DataCurve::setLabelsColumnName(const QString& name)
{
if (!validCurveType())
return;
if (d_labels_column == name && !d_labels_list.isEmpty())
return;
d_labels_column = name;
loadLabels();
}
void DataCurve::loadLabels()
{
if (!validCurveType())
return;
clearLabels();
int xcol = d_table->colIndex(d_x_column);
int ycol = d_table->colIndex(title().text());
int labelsCol = d_table->colIndex(d_labels_column);
int cols = d_table->numCols();
if (xcol < 0 || ycol < 0 || labelsCol < 0 ||
xcol >= cols || ycol >= cols || labelsCol >= cols)
return;
QwtPlot *d_plot = plot();
if (!d_plot)
return;
int index = 0;
for (int i = d_start_row; i <= d_end_row; i++) {
if (d_table->text(i, xcol).isEmpty() ||
d_table->text(i, ycol).isEmpty())
continue;
PlotMarker *m = new PlotMarker(index, d_labels_angle);
QwtText t = QwtText(d_table->text(i, labelsCol));
t.setColor(d_labels_color);
t.setFont(d_labels_font);
if (d_white_out_labels)
t.setBackgroundBrush(QBrush(Qt::white));
else
t.setBackgroundBrush(QBrush(Qt::transparent));
m->setLabel(t);
int x_axis = xAxis();
int y_axis = yAxis();
m->setAxis(x_axis, y_axis);
QSize size = t.textSize();
int dx = int(d_labels_x_offset*0.01*size.height());
int dy = -int((d_labels_y_offset*0.01 + 0.5)*size.height());
int x2 = d_plot->transform(x_axis, x(index)) + dx;
int y2 = d_plot->transform(y_axis, y(index)) + dy;
switch(d_labels_align) {
case Qt::AlignLeft:
break;
case Qt::AlignHCenter:
x2 -= size.width()/2;
break;
case Qt::AlignRight:
x2 -= size.width();
break;
}
m->setXValue(d_plot->invTransform(x_axis, x2));
m->setYValue(d_plot->invTransform(y_axis, y2));
m->attach(d_plot);
d_labels_list << m;
index++;
}
d_show_labels = true;
}
