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Diffstat (limited to 'examples/widgets/effects/blurpicker/blurpicker.py')
| -rw-r--r-- | examples/widgets/effects/blurpicker/blurpicker.py | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/examples/widgets/effects/blurpicker/blurpicker.py b/examples/widgets/effects/blurpicker/blurpicker.py new file mode 100644 index 000000000..560a6dcad --- /dev/null +++ b/examples/widgets/effects/blurpicker/blurpicker.py @@ -0,0 +1,151 @@ +############################################################################# +## +## 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) |