Qt:Документация 4.3.2/itemviews-stardelegate-stareditor-cpp

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[править] stareditor.cpp Example File
itemviews/stardelegate/stareditor.cpp

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 ** This file is part of the example classes of the Qt Toolkit.
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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(&amp;painter, rect(), this->palette(),
                        StarRating::Editable);
 }
 
 void StarEditor::mouseMoveEvent(QMouseEvent *event)
 {
     int star = starAtPosition(event->x());
 
     if (star != myStarRating.starCount() &amp;&amp; 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;
 }

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Qt 4.3.2