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Diffstat (limited to 'examples/widgets/itemviews/stardelegate/stareditor.py')
-rw-r--r-- | examples/widgets/itemviews/stardelegate/stareditor.py | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/examples/widgets/itemviews/stardelegate/stareditor.py b/examples/widgets/itemviews/stardelegate/stareditor.py new file mode 100644 index 000000000..440659a4f --- /dev/null +++ b/examples/widgets/itemviews/stardelegate/stareditor.py @@ -0,0 +1,99 @@ +#!/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 |