/**
* Sets the line color used by the line.
*/
void LinePath::setLineColor( const QColor &color )
{
uint linewidth = 0;
Q3CanvasLine * line = 0;
Q_FOREACH( line, m_LineList ) {
linewidth = line->pen().width();
line->setPen( QPen( color, linewidth ) );
}
// creates a polygon from a given vector RegularData1D * data
void RegularData1DWidget::createPlot()
{
// no data => no polygon
if (data_ == 0 ||
data_->size() == 0)
{
return;
}
// find the data min and max
float min = (*data_)[0];
float max = (*data_)[0];
float dif_min = min;
float old = min; //last point
if (dif_min == 0) dif_min = 1;
for (int i=0; i<(int)data_->size(); i++)
{
if ((*data_)[i] >= max) max = (*data_)[i];
if ((*data_)[i] <= min) min = (*data_)[i];
float dif = (*data_)[i] - old;
if ( (dif > 1e-3) && (dif < dif_min) )
{
dif_min = dif;
}
old = (*data_)[i];
}
int height_ = (int)ceil(((max-min) / dif_min) * 5);
if (height_ > 1000)
{
// the resulting picture would be much too large
height_ = 1000;
dif_min = (max - min)/200.;
}
// resize the canvas to fit the data
canvas_.resize(5*(data_->size()+2), height_+10);
int x_new;
int y_new;
int x_old = 5;
int y_old = height_+5 - (int)((((*data_)[0]-min)/dif_min)*5);
Q3CanvasLine *ql;
try
{
for (int i=0; i<(int)data_->size(); i++)
{
x_new = 5*(i+1);
y_new = height_+5 - (int)(((data_->getData(i)-min)/dif_min)*5);
ql = new Q3CanvasLine(&canvas_);
ql->setPen(diagram_color_);
ql->show();
ql->setPoints(x_old, y_old, x_new, y_new);
objects_.push_back(dynamic_cast<Q3CanvasItem*> (ql));
x_old = x_new;
y_old = y_new;
}
}
catch(...)
{
setStatusbarText("Error: Point in dataset out of grid!");
Log.error() << "Error: Point in dataset out of grid!" << std::endl;
return;
}
//add the x-axis
ql = new Q3CanvasLine(&canvas_);
int startx = 1;
int starty = height_+5 - (int)/*round*/(((startx-min)/dif_min)*5);
int endx = data_->size()*5;
ql->setPoints(startx, starty, endx, starty);
ql->setPen(axis_color_);
ql->show();
objects_.push_back(dynamic_cast<Q3CanvasItem*> (ql));
//add the y-axis
ql = new Q3CanvasLine(&canvas_);
startx = 4;
starty = 0;
int endy = height_+5 - (int)/*round*/((((*data_)[endx]-min)/dif_min)*5);
ql->setPoints(startx, starty, startx, endy);
ql->setPen(QColor(Qt::red));
ql->show();
objects_.push_back(dynamic_cast<Q3CanvasItem*> (ql));
}
