void DlgSettingsSegments::updatePreview()
{
LOG4CPP_INFO_S ((*mainCat)) << "DlgSettingsSegments::updatePreview"
<< " loading=" << (m_loading ? "true" : "false");
const QString ARBITRARY_IDENTIFIER ("");
const QColor COLOR (Qt::blue);
const int RADIUS = 5;
if (!m_loading) {
SegmentFactory segmentFactory (*m_scenePreview,
mainWindow().isGnuplot());
clearPoints();
segmentFactory.clearSegments (m_segments);
// Create new segments
segmentFactory.makeSegments (createPreviewImage(),
*m_modelSegmentsAfter,
m_segments);
// Make the segment visible
QList<Segment*>::iterator itrS;
for (itrS = m_segments.begin(); itrS != m_segments.end(); itrS++) {
Segment *segment = *itrS;
segment->slotHover (true);
}
// Create some points
PointStyle pointStyle (POINT_SHAPE_CROSS,
RADIUS,
BRUSH_WIDTH,
COLOR_PALETTE_BLUE);
QPolygonF polygon = pointStyle.polygon();
QList<QPoint> points = segmentFactory.fillPoints (*m_modelSegmentsAfter,
m_segments);
QList<QPoint>::iterator itrP;
for (itrP = points.begin(); itrP != points.end(); itrP++) {
QPoint pos = *itrP;
GraphicsPoint *graphicsPoint = new GraphicsPoint (*m_scenePreview,
ARBITRARY_IDENTIFIER,
pos,
COLOR,
polygon,
BRUSH_WIDTH);
m_points.push_back (graphicsPoint);
}
}
}
QPixmap ViewPointStyle::pixmap (const PointStyle &pointStyle) const
{
LOG4CPP_INFO_S ((*mainCat)) << "ViewPointStyle::pixmap";
// Polygon that is sized for the main drawing window.
QPolygonF polygonUnscaled = pointStyle.polygon();
// Resize polygon to fit icon, by builiding a new scaled polygon from the unscaled polygon
double xMinGot = polygonUnscaled.boundingRect().left();
double xMaxGot = polygonUnscaled.boundingRect().right();
double yMinGot = polygonUnscaled.boundingRect().top();
double yMaxGot = polygonUnscaled.boundingRect().bottom();
QPolygonF polygonScaled;
for (int i = 0; i < polygonUnscaled.length(); i++) {
QPointF pOld = polygonUnscaled.at(i);
polygonScaled.append (QPointF ((width () - 1) * (pOld.x() - xMinGot) / (xMaxGot - xMinGot),
(height () - 1) * (pOld.y() - yMinGot) / (yMaxGot - yMinGot)));
}
// Color
QColor color = ColorPaletteToQColor(pointStyle.paletteColor());
// Image for drawing
QImage img (width (),
height (),
QImage::Format_RGB32);
QPainter painter (&img);
painter.fillRect (0,
0,
width (),
height (),
QBrush (COLOR_FOR_BRUSH));
painter.setPen (QPen (color));
painter.drawPolygon (polygonScaled);
// Create pixmap from image
QPixmap pixmap = QPixmap::fromImage (img);
return pixmap;
}