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# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
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._index = 0
self._animation = QPropertyAnimation(self, b"index")
self._path = Path(__file__).resolve().parent
self._background = QPixmap(self._path / "images" / "background.jpg")
self.setBackgroundBrush(self._background)
self.setScene(QGraphicsScene(self))
self._icons = []
self.setup_scene()
self.index = 0
self._animation.setDuration(400)
self._animation.setEasingCurve(QEasingCurve.InOutSine)
self.setRenderHint(QPainter.Antialiasing, True)
self.setFrameStyle(QFrame.NoFrame)
@Property(float)
def index(self) -> float:
return self._index
@index.setter
def index(self, index: float):
self._index = index
base_line = 0.0
iconAngle = 2 * pi / len(self._icons)
for i, icon in enumerate(self._icons):
a = (i + self._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 = ["accessories-calculator.png", "accessories-text-editor.png",
"help-browser.png", "internet-group-chat.png",
"internet-mail.png", "internet-web-browser.png", "office-calendar.png",
"system-users.png"]
for name in names:
pixmap = QPixmap(self._path / "images" / name)
icon: QGraphicsPixmapItem = self.scene().addPixmap(pixmap)
icon.setZValue(1)
icon.setGraphicsEffect(BlurEffect(icon))
self._icons.append(icon)
bg: QGraphicsPixmapItem = self.scene().addPixmap(self._background)
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._animation.state() == QAbstractAnimation.Stopped and delta:
self._animation.setEndValue(self._index + delta)
self._animation.start()
event.accept()
def mousePressEvent(self, event):
right = event.position().x() > (self.width() / 2)
delta = 1 if right else -1
if self._animation.state() == QAbstractAnimation.Stopped:
self._animation.setEndValue(self._index + delta)
self._animation.start()
event.accept()
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