stareditor.cpp Example File

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  #include <QtWidgets>

  #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;
  }