starrating.cpp Example File
itemviews/stardelegate/starrating.cpp
#include <QtGui>
#include <math.h>
#include "starrating.h"
const int PaintingScaleFactor = 20;
StarRating::StarRating(int starCount, int maxStarCount)
{
myStarCount = starCount;
myMaxStarCount = maxStarCount;
starPolygon << QPointF(1.0, 0.5);
for (int i = 1; i < 5; ++i)
starPolygon << QPointF(0.5 + 0.5 * cos(0.8 * i * 3.14),
0.5 + 0.5 * sin(0.8 * i * 3.14));
diamondPolygon << QPointF(0.4, 0.5) << QPointF(0.5, 0.4)
<< QPointF(0.6, 0.5) << QPointF(0.5, 0.6)
<< QPointF(0.4, 0.5);
}
QSize StarRating::sizeHint() const
{
return PaintingScaleFactor * QSize(myMaxStarCount, 1);
}
void StarRating::paint(QPainter *painter, const QRect &rect,
const QPalette &palette, EditMode mode) const
{
painter->save();
painter->setRenderHint(QPainter::Antialiasing, true);
painter->setPen(Qt::NoPen);
if (mode == Editable) {
painter->setBrush(palette.highlight());
} else {
painter->setBrush(palette.foreground());
}
int yOffset = (rect.height() - PaintingScaleFactor) / 2;
painter->translate(rect.x(), rect.y() + yOffset);
painter->scale(PaintingScaleFactor, PaintingScaleFactor);
for (int i = 0; i < myMaxStarCount; ++i) {
if (i < myStarCount) {
painter->drawPolygon(starPolygon, Qt::WindingFill);
} else if (mode == Editable) {
painter->drawPolygon(diamondPolygon, Qt::WindingFill);
}
painter->translate(1.0, 0.0);
}
painter->restore();
}
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Qt 4.4.3 |