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+#!/usr/bin/python
+
+#############################################################################
+##
+## Copyright (C) 2010 Hans-Peter Jansen <hpj@urpla.net>
+## Copyright (C) 2011 Arun Srinivasan <rulfzid@gmail.com>
+## Copyright (C) 2016 The Qt Company Ltd.
+## Contact: http://www.qt.io/licensing/
+##
+## This file is part of the PySide examples of the Qt Toolkit.
+##
+## $QT_BEGIN_LICENSE:BSD$
+## You may use this file under the terms of the BSD license as follows:
+##
+## "Redistribution and use in source and binary forms, with or without
+## modification, are permitted provided that the following conditions are
+## met:
+## * Redistributions of source code must retain the above copyright
+## notice, this list of conditions and the following disclaimer.
+## * Redistributions in binary form must reproduce the above copyright
+## notice, this list of conditions and the following disclaimer in
+## the documentation and/or other materials provided with the
+## distribution.
+## * Neither the name of The Qt Company Ltd nor the names of its
+## contributors may be used to endorse or promote products derived
+## from this software without specific prior written permission.
+##
+##
+## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+## "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+## LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+## A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+## OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+## LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+## DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+## THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+## (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+## OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+##
+## $QT_END_LICENSE$
+##
+#############################################################################
+
+from PySide2.QtWidgets import (QWidget)
+from PySide2.QtGui import (QPainter)
+from PySide2.QtCore import Signal
+
+
+class StarEditor(QWidget):
+ """ The custome editor for editing StarRatings. """
+
+ # A signal to tell the delegate when we've finished editing.
+ editingFinished = Signal()
+
+ def __init__(self, parent=None):
+ """ Initialize the editor object, making sure we can watch mouse
+ events.
+ """
+ super(StarEditor, self).__init__(parent)
+
+ self.setMouseTracking(True)
+ self.setAutoFillBackground(True)
+
+ def sizeHint(self):
+ """ Tell the caller how big we are. """
+ return self.starRating.sizeHint()
+
+ def paintEvent(self, event):
+ """ Paint the editor, offloading the work to the StarRating class. """
+ painter = QPainter(self)
+ self.starRating.paint(painter, self.rect(), self.palette(), isEditable=True)
+
+ def mouseMoveEvent(self, event):
+ """ As the mouse moves inside the editor, track the position and
+ update the editor to display as many stars as necessary.
+ """
+ star = self.starAtPosition(event.x())
+
+ if (star != self.starRating.starCount) and (star != -1):
+ self.starRating.starCount = star
+ self.update()
+
+ def mouseReleaseEvent(self, event):
+ """ Once the user has clicked his/her chosen star rating, tell the
+ delegate we're done editing.
+ """
+ self.editingFinished.emit()
+
+ def starAtPosition(self, x):
+ """ Calculate which star the user's mouse cursor is currently
+ hovering over.
+ """
+ star = (x / (self.starRating.sizeHint().width() /
+ self.starRating.maxStarCount)) + 1
+ if (star <= 0) or (star > self.starRating.maxStarCount):
+ return -1
+
+ return star