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#############################################################################
##
## Copyright (C) 2021 The Qt Company Ltd.
## Contact: http://www.qt.io/licensing/
##
## This file is part of the Qt for Python 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 pathlib import Path
from PySide6.QtCore import (
QEasingCurve,
QPointF,
Qt,
QAbstractAnimation,
QPropertyAnimation,
Property,
)
from PySide6.QtGui import QPainter, QTransform, QPixmap
from PySide6.QtWidgets import QGraphicsView, QFrame, QGraphicsScene, QGraphicsPixmapItem
from math import pi, sin, cos
from blureffect import BlurEffect
class BlurPicker(QGraphicsView):
def __init__(self, parent=None):
super().__init__(parent)
self.m_index = 0
self.m_animation = QPropertyAnimation(self, b"index")
self.path = Path(__file__).resolve().parent
self.setBackgroundBrush(QPixmap(self.path / "images" / "background.jpg"))
self.setScene(QGraphicsScene(self))
self.m_icons = []
self.setup_scene()
self.set_index(0)
self.m_animation.setDuration(400)
self.m_animation.setEasingCurve(QEasingCurve.InOutSine)
self.setRenderHint(QPainter.Antialiasing, True)
self.setFrameStyle(QFrame.NoFrame)
def read_index(self) -> float:
return self.m_index
def set_index(self, index: float):
self.m_index = index
base_line = 0.0
iconAngle = 2 * pi / len(self.m_icons)
for i, icon in enumerate(self.m_icons):
a = (i + self.m_index) * iconAngle
xs = 170 * sin(a)
ys = 100 * cos(a)
pos = QPointF(xs, ys)
pos = QTransform().rotate(-20).map(pos)
pos -= QPointF(40, 40)
icon.setPos(pos)
base_line = max(base_line, ys)
icon.graphicsEffect().set_base_line(base_line)
self.scene().update()
def setup_scene(self):
self.scene().setSceneRect(-200, -120, 400, 240)
names = [
self.path / "images" / "accessories-calculator.png",
self.path / "images" / "accessories-text-editor.png",
self.path / "images" / "help-browser.png",
self.path / "images" / "internet-group-chat.png",
self.path / "images" / "internet-mail.png",
self.path / "images" / "internet-web-browser.png",
self.path / "images" / "office-calendar.png",
self.path / "images" / "system-users.png",
]
for name in names:
pixmap = QPixmap(name)
icon: QGraphicsPixmapItem = self.scene().addPixmap(pixmap)
icon.setZValue(1)
icon.setGraphicsEffect(BlurEffect(icon))
self.m_icons.append(icon)
bg: QGraphicsPixmapItem = self.scene().addPixmap(
QPixmap(self.path / "images" / "background.jpg")
)
bg.setZValue(0)
bg.setPos(-200, -150)
def keyPressEvent(self, event):
delta = 0
if event.key() == Qt.Key_Left:
delta = -1
elif event.key() == Qt.Key_Right:
delta = 1
if self.m_animation.state() == QAbstractAnimation.Stopped and delta:
self.m_animation.setEndValue(self.m_index + delta)
self.m_animation.start()
event.accept()
def mousePressEvent(self, event):
if event.position().x() > (self.width() / 2):
delta = 1
else:
delta = -1
if self.m_animation.state() == QAbstractAnimation.Stopped:
self.m_animation.setEndValue(self.m_index + delta)
self.m_animation.start()
event.accept()
index = Property(float, read_index, set_index)
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