Initial version of the Star Picker Widget.

A very simple to use widget:
StarWidget *stars = new StarWidget( windowParent);
stars->setMaximumStars(10);
stars->setCurrentStars( rand()%10);
stars->show();
connect(stars, SIGNAL(valueChanged(int)), someObj, SLOT(starsChangedValue(int)));

It currently uses a 'star.svg' file on the same folder as the binary.

Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

qt-ui/starwidget.cpp

@@ -0,0 +1,102 @@
+#include "starwidget.h"
+#include <QSvgRenderer>
+#include <QPainter>
+#include <QPaintEvent>
+#include <QDebug>
+#include <QMouseEvent>
+
+int StarWidget::currentStars() const
+{
+	return current;
+}
+
+void StarWidget::enableHalfStars(bool enabled)
+{
+	halfStar = enabled;
+	update();
+}
+
+bool StarWidget::halfStarsEnabled() const
+{
+	return halfStar;
+}
+
+int StarWidget::maxStars() const
+{
+	return stars;
+}
+
+void StarWidget::mouseReleaseEvent(QMouseEvent* event)
+{
+	int starClicked = event->pos().x() / IMG_SIZE + 1;
+	if (starClicked > stars)
+		starClicked = stars;
+
+	if (current == starClicked)
+		current -= 1;
+	else
+		current = starClicked;
+
+	update();
+}
+
+void StarWidget::paintEvent(QPaintEvent* event)
+{
+	QPainter p(this);
+
+	for(int i = 0; i < current; i++)
+		p.drawPixmap(i * IMG_SIZE + SPACING, 0, activeStar);
+
+	for(int i = current; i < stars; i++)
+		p.drawPixmap(i * IMG_SIZE + SPACING, 0, inactiveStar);
+}
+
+void StarWidget::setCurrentStars(int value)
+{
+	current = value;
+	update();
+	Q_EMIT valueChanged(current);
+}
+
+void StarWidget::setMaximumStars(int maximum)
+{
+	stars = maximum;
+	update();
+}
+
+StarWidget::StarWidget(QWidget* parent, Qt::WindowFlags f):
+	QWidget(parent, f),
+	stars(5),
+	current(0),
+	halfStar(false)
+{
+	QSvgRenderer render(QString("star.svg"));
+	QPixmap renderedStar(IMG_SIZE, IMG_SIZE);
+
+	renderedStar.fill(Qt::transparent);
+	QPainter painter(&renderedStar);
+
+	render.render(&painter, QRectF(0, 0, IMG_SIZE, IMG_SIZE));
+	activeStar = renderedStar;
+	inactiveStar = grayImage(&renderedStar);
+}
+
+QPixmap StarWidget::grayImage(QPixmap* coloredImg)
+{
+	QImage img = coloredImg->toImage();
+	for (int i = 0; i < img.width(); ++i) {
+		for (int j = 0; j < img.height(); ++j) {
+			QRgb col = img.pixel(i, j);
+			if (!col)
+				continue;
+			int gray = QColor(Qt::darkGray).rgb();
+			img.setPixel(i, j, qRgb(gray, gray, gray));
+		}
+	}
+	return QPixmap::fromImage(img);
+}
+
+QSize StarWidget::sizeHint() const
+{
+	return QSize(IMG_SIZE * stars + SPACING * (stars-1), IMG_SIZE);
+}