Qt 4.6: stareditor.cpp Example File (itemviews/stardelegate/stareditor.cpp)

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# stareditor.cpp Example File
itemviews/stardelegate/stareditor.cpp

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     #include <QtGui>

     #include "stareditor.h"
     #include "starrating.h"

     StarEditor::StarEditor(QWidget *parent)
         : QWidget(parent)
     {
         setMouseTracking(true);
         setAutoFillBackground(true);
     }

     QSize StarEditor::sizeHint() const
     {
         return myStarRating.sizeHint();
     }

     void StarEditor::paintEvent(QPaintEvent *)
     {
         QPainter painter(this);
         myStarRating.paint(&painter, rect(), this->palette(),
                            StarRating::Editable);
     }

     void StarEditor::mouseMoveEvent(QMouseEvent *event)
     {
         int star = starAtPosition(event->x());

         if (star != myStarRating.starCount() && star != -1) {
             myStarRating.setStarCount(star);
             update();
         }
     }

     void StarEditor::mouseReleaseEvent(QMouseEvent * /* event */)
     {
         emit editingFinished();
     }

     int StarEditor::starAtPosition(int x)
     {
         int star = (x / (myStarRating.sizeHint().width()
                          / myStarRating.maxStarCount())) + 1;
         if (star <= 0 || star > myStarRating.maxStarCount())
             return -1;

         return star;
     }