// ----------------------------------------------------------------------------
// Draws all of the spans for 2 edges
// ----------------------------------------------------------------------------
void drawSpansBetweenEdges(std::shared_ptr<TransferMap> & map, Edge & e1, Edge & e2)
{
// Calculate differences between the y coordinates
float e1ydiff = (float)(e1.p2[1] - e1.p1[1]);
if (e1ydiff == 0.0f) return;
float e2ydiff = (float)(e2.p2[1] - e2.p1[1]);
if (e2ydiff == 0.0f) return;
// Calculate differences between the x coordinates
float e1xdiff = (float)(e1.p2[0] - e1.p1[0]);
float e2xdiff = (float)(e2.p2[0] - e2.p1[0]);
// Calculate factors to use for interpolation
// with the edges and the step values to increase
// them by after drawing each span
float factor1 = (float)(e2.p1[1] - e1.p1[1]) / e1ydiff;
float factorStep1 = 1.0f / e1ydiff;
float factor2 = 0.0f;
float factorStep2 = 1.0f / e2ydiff;
// Loop through the lines between the edges and draw spans
for(int y = e2.p1[1]; y < e2.p2[1]; y++)
{
// Draw the span
auto m1 = interp(*e1.m1, *e1.m2, factor1);
auto m2 = interp(*e2.m1, *e2.m2, factor2);
drawSpan(map, Span(m1, e1.p1[0] + (int)(e1xdiff * factor1),
m2, e2.p1[0] + (int)(e2xdiff * factor2)), y);
// Increase factors
factor1 += factorStep1;
factor2 += factorStep2;
}
}
void CSliderMultiPos::paintEvent(QPaintEvent* event){
int currentIndex;
QStyleOptionSlider opt;
Q_UNUSED(event);
QStylePainter painter(this);
initStyleOption(&opt);
// ticks
opt.subControls = QStyle::SC_SliderTickmarks;
painter.drawComplexControl(QStyle::CC_Slider, opt);
// groove
opt.sliderValue = 0;
opt.sliderPosition = 0;
opt.subControls = QStyle::SC_SliderGroove;
painter.drawComplexControl(QStyle::CC_Slider, opt);
for( currentIndex=0;currentIndex<nbValues()-1;currentIndex++ ){
if( intervals.at(currentIndex).isEnable() ){
// handle rects
opt.sliderPosition = handles.at(currentIndex).getPosition();
const QRect rectHandleFirst = style()->subControlRect(QStyle::CC_Slider, &opt, QStyle::SC_SliderHandle, this);
const int lrv = pick(rectHandleFirst.center());
opt.sliderPosition = handles.at(currentIndex+1).getPosition();
const QRect rectHandleSecond = style()->subControlRect(QStyle::CC_Slider, &opt, QStyle::SC_SliderHandle, this);
const int urv = pick(rectHandleSecond.center());
// span
const int minv = qMin(lrv, urv);
const int maxv = qMax(lrv, urv);
const QPoint c = style()->subControlRect(QStyle::CC_Slider, &opt, QStyle::SC_SliderGroove, this).center();
QRect spanRect;
if( orientation()==Qt::Horizontal){
spanRect = QRect(QPoint(minv, c.y() - 2), QPoint(maxv, c.y() + 1));
}
else{
spanRect = QRect(QPoint(c.x() - 2, minv), QPoint(c.x() + 1, maxv));
}
drawSpan(&painter, spanRect,currentIndex);
}
}
// handles
for(int index=0;index<nbValues();index++){
// Call drawHandle for all, with the last pressed index at last of call (for being on top)
drawHandle( &painter, (lastPressedIndex+index+1)%nbValues() );
}
}