void DiscreteSlider::setSections(const QStringList &labels) {
t_assert(!labels.isEmpty());
_sections.clear();
for_const (auto &label, labels) {
_sections.push_back(Section(label, getLabelFont()));
}
void PrimitivePainter::drawPointLabel(QPointF C, QString str, QString strBg, QPainter* thePainter, qreal PixelPerM) const
{
LineParameters lp = labelBoundary();
qreal WW = PixelPerM*lp.Proportional+lp.Fixed;
if (WW < 10) return;
QFont font = getLabelFont();
font.setPixelSize(int(WW));
QFontMetrics metrics(font);
int modX = 0;
int modY = 0;
QPainterPath textPath;
QPainterPath bgPath;
if (!str.isEmpty()) {
modX = - (metrics.width(str)/2);
if (DrawIcon && !IconName.isEmpty() )
{
QImage pm(IconName);
modY = - pm.height();
if (DrawLabelBackground)
modY -= BG_SPACING;
}
textPath.addText(modX, modY, font, str);
thePainter->translate(C);
}
if (DrawLabelBackground && !strBg.isEmpty()) {
modX = - (metrics.width(strBg)/2);
if (DrawIcon && !IconName.isEmpty() )
{
QImage pm(IconName);
modY = - pm.height();
if (DrawLabelBackground)
modY -= BG_SPACING;
}
textPath.addText(modX, modY, font, strBg);
thePainter->translate(C);
bgPath.addRect(textPath.boundingRect().adjusted(-BG_SPACING, -BG_SPACING, BG_SPACING, BG_SPACING));
thePainter->setPen(QPen(LabelColor, BG_PEN_SZ));
thePainter->setBrush(LabelBackgroundColor);
thePainter->drawPath(bgPath);
}
if (getLabelHalo()) {
thePainter->setPen(QPen(Qt::white, font.pixelSize()/5));
thePainter->drawPath(textPath);
}
thePainter->setPen(Qt::NoPen);
thePainter->setBrush(LabelColor);
thePainter->drawPath(textPath);
if (DrawLabelBackground && !strBg.isEmpty()) {
QRegion rg = thePainter->clipRegion();
rg -= textPath.boundingRect().toRect().translated(C.toPoint());
thePainter->setClipRegion(rg);
}
}
void PrimitivePainter::drawLabel(QPainterPath* R, QPainter* thePainter, qreal PixelPerM, QString str, QString strBg) const
{
if (!DrawLabel)
return;
if (str.isEmpty() && strBg.isEmpty())
return;
thePainter->save();
if (getLabelArea()) {
QPointF C(R->boundingRect().center());
drawPointLabel(C, str, strBg, thePainter, PixelPerM);
thePainter->restore();
return;
}
LineParameters lp = labelBoundary();
qreal WW = PixelPerM*lp.Proportional+lp.Fixed;
if (WW < 10) return;
//qreal WWR = qMax(PixelPerM*R->widthOf()*BackgroundScale+BackgroundOffset, PixelPerM*R->widthOf()*ForegroundScale+ForegroundOffset);
QPainterPath textPath;
QPainterPath tranformedRoadPath = *R;
QFont font = getLabelFont();
if (!str.isEmpty()) {
QRegion rg = thePainter->clipRegion();
font.setPixelSize(int(WW));
QFontMetrics metrics(font);
if (font.pixelSize() >= 5 && tranformedRoadPath.length() > metrics.width(str)) {
thePainter->setFont(font);
int repeat = int((tranformedRoadPath.length() / ((metrics.width(str) * LABEL_PATH_DISTANCE))) - 0.5);
int numSegment = repeat+1;
qreal lenSegment = tranformedRoadPath.length() / numSegment;
qreal startSegment = 0;
QPainterPath textPath;
do {
QRegion rg = thePainter->clipRegion();
qreal curLen = startSegment + ((lenSegment - metrics.width(str)) / 2);
int modIncrement = 1;
qreal modAngle = 0;
int modY = 0;
if (cos(angToRad(tranformedRoadPath.angleAtPercent((startSegment+(lenSegment/2))/tranformedRoadPath.length()))) < 0) {
modIncrement = -1;
modAngle = 180.0;
curLen += metrics.width(str);
}
for (int i = 0; i < str.length(); ++i) {
qreal t = tranformedRoadPath.percentAtLength(curLen);
QPointF pt = tranformedRoadPath.pointAtPercent(t);
qreal angle = tranformedRoadPath.angleAtPercent(t);
modY = (metrics.ascent()/2)-3;
QMatrix m;
m.translate(pt.x(), pt.y());
m.rotate(-angle+modAngle);
QPainterPath charPath;
charPath.addText(0, modY, font, str.mid(i, 1));
charPath = charPath * m;
textPath.addPath(charPath);
qreal incremenet = metrics.width(str[i]);
curLen += (incremenet * modIncrement);
}
startSegment += lenSegment;
} while (--repeat >= 0);
if (getLabelHalo()) {
thePainter->setPen(QPen(Qt::white, font.pixelSize()/6));
thePainter->drawPath(textPath);
}
thePainter->setPen(Qt::NoPen);
thePainter->setBrush(LabelColor);
thePainter->drawPath(textPath);
thePainter->setClipRegion(rg);
}
}
if (DrawLabelBackground && !strBg.isEmpty()) {
QRegion rg = thePainter->clipRegion();
font.setPixelSize(int(WW));
QFontMetrics metrics(font);
int repeat = int((tranformedRoadPath.length() / (metrics.width(strBg) * LABEL_STRAIGHT_DISTANCE)) - 0.5);
int numSegment = repeat+1;
qreal lenSegment = tranformedRoadPath.length() / numSegment;
qreal startSegment = 0;
do {
int modX = 0;
int modY = 0;
qreal curLen = startSegment + (lenSegment / 2);
qreal t = tranformedRoadPath.percentAtLength(curLen);
QPointF pt = tranformedRoadPath.pointAtPercent(t);
modX = - (metrics.width(strBg)/2);
//modX = WW;
modY = (metrics.ascent()/2);
QPainterPath textPath, bgPath;
textPath.addText(modX, modY, font, strBg);
bgPath.addRect(textPath.boundingRect().adjusted(-BG_SPACING, -BG_SPACING, BG_SPACING, BG_SPACING));
bool rgContains = false;
for (int i=0; i<rg.rects().size(); i++) {
if (rg.rects()[i].contains(bgPath.boundingRect().toRect().translated(pt.toPoint()))) {
rgContains = true;
break;
}
}
if (rgContains) {
thePainter->translate(pt);
thePainter->setPen(QPen(LabelColor, BG_PEN_SZ));
thePainter->setBrush(LabelBackgroundColor);
thePainter->drawPath(bgPath);
if (getLabelHalo()) {
thePainter->setPen(QPen(Qt::white, font.pixelSize()/5));
thePainter->drawPath(textPath);
}
thePainter->setPen(Qt::NoPen);
thePainter->setBrush(LabelColor);
thePainter->drawPath(textPath);
rg -= bgPath.boundingRect().toRect().translated(pt.toPoint());
}
startSegment += lenSegment;
} while (--repeat >= 0);
thePainter->setClipRegion(rg);
}
thePainter->restore();
}
void DiscreteSlider::addSection(const QString &label) {
_sections.push_back(Section(label, getLabelFont()));
resizeToWidth(width());
}
