Qt 5.9 | Qt Widgets | Star Delegate Example | stareditor.cpp Example File

Qt 5.9.9 Reference Documentation

# stareditor.cpp Example File

itemviews/stardelegate/stareditor.cpp

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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;
      }