# Copyright (C) 2010 Riverbank Computing Limited.
# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
from __future__ import annotations

import sys

from PySide6.QtCore import (QPointF, QPropertyAnimation,
                            QSequentialAnimationGroup, QRect, QRectF, QSizeF,
                            Qt)
from PySide6.QtGui import QPixmap
from PySide6.QtWidgets import (QApplication, QGraphicsLinearLayout,
                               QGraphicsObject, QGraphicsProxyWidget,
                               QGraphicsWidget, QGraphicsScene, QGraphicsView,
                               QGroupBox, QPushButton, QRadioButton,
                               QTextEdit, QVBoxLayout)

from PySide6.QtStateMachine import QState, QStateMachine

import states_rc  # noqa: F401


class Pixmap(QGraphicsObject):
    def __init__(self, pix):
        super().__init__()

        self.p = QPixmap(pix)

    def paint(self, painter, option, widget):
        painter.drawPixmap(QPointF(), self.p)

    def boundingRect(self):
        return QRectF(QPointF(0, 0), QSizeF(self.p.size()))


if __name__ == '__main__':
    app = QApplication(sys.argv)

    # Text edit and button.
    edit = QTextEdit()
    edit.setText("asdf lkjha yuoiqwe asd iuaysd u iasyd uiy "
                 "asdf lkjha yuoiqwe asd iuaysd u iasyd uiy "
                 "asdf lkjha yuoiqwe asd iuaysd u iasyd uiy "
                 "asdf lkjha yuoiqwe asd iuaysd u iasyd uiy!")

    button = QPushButton()
    button_proxy = QGraphicsProxyWidget()
    button_proxy.setWidget(button)
    edit_proxy = QGraphicsProxyWidget()
    edit_proxy.setWidget(edit)

    box = QGroupBox()
    box.setFlat(True)
    box.setTitle("Options")

    layout2 = QVBoxLayout()
    box.setLayout(layout2)
    layout2.addWidget(QRadioButton("Herring"))
    layout2.addWidget(QRadioButton("Blue Parrot"))
    layout2.addWidget(QRadioButton("Petunias"))
    layout2.addStretch()

    box_proxy = QGraphicsProxyWidget()
    box_proxy.setWidget(box)

    # Parent widget.
    widget = QGraphicsWidget()
    layout = QGraphicsLinearLayout(Qt.Vertical, widget)
    layout.addItem(edit_proxy)
    layout.addItem(button_proxy)
    widget.setLayout(layout)

    p1 = Pixmap(QPixmap(':/digikam.png'))
    p2 = Pixmap(QPixmap(':/akregator.png'))
    p3 = Pixmap(QPixmap(':/accessories-dictionary.png'))
    p4 = Pixmap(QPixmap(':/k3b.png'))
    p5 = Pixmap(QPixmap(':/help-browser.png'))
    p6 = Pixmap(QPixmap(':/kchart.png'))

    scene = QGraphicsScene(0, 0, 400, 300)
    scene.setBackgroundBrush(scene.palette().window())
    scene.addItem(widget)
    scene.addItem(box_proxy)
    scene.addItem(p1)
    scene.addItem(p2)
    scene.addItem(p3)
    scene.addItem(p4)
    scene.addItem(p5)
    scene.addItem(p6)

    machine = QStateMachine()
    state1 = QState(machine)
    state2 = QState(machine)
    state3 = QState(machine)
    machine.setInitialState(state1)

    # State 1.
    state1.assignProperty(button, 'text', "Switch to state 2")
    state1.assignProperty(widget, 'geometry', QRectF(0, 0, 400, 150))
    state1.assignProperty(box, 'geometry', QRect(-200, 150, 200, 150))
    state1.assignProperty(p1, 'pos', QPointF(68, 185))
    state1.assignProperty(p2, 'pos', QPointF(168, 185))
    state1.assignProperty(p3, 'pos', QPointF(268, 185))
    state1.assignProperty(p4, 'pos', QPointF(68 - 150, 48 - 150))
    state1.assignProperty(p5, 'pos', QPointF(168, 48 - 150))
    state1.assignProperty(p6, 'pos', QPointF(268 + 150, 48 - 150))
    state1.assignProperty(p1, 'rotation', 0.0)
    state1.assignProperty(p2, 'rotation', 0.0)
    state1.assignProperty(p3, 'rotation', 0.0)
    state1.assignProperty(p4, 'rotation', -270.0)
    state1.assignProperty(p5, 'rotation', -90.0)
    state1.assignProperty(p6, 'rotation', 270.0)
    state1.assignProperty(box_proxy, 'opacity', 0.0)
    state1.assignProperty(p1, 'opacity', 1.0)
    state1.assignProperty(p2, 'opacity', 1.0)
    state1.assignProperty(p3, 'opacity', 1.0)
    state1.assignProperty(p4, 'opacity', 0.0)
    state1.assignProperty(p5, 'opacity', 0.0)
    state1.assignProperty(p6, 'opacity', 0.0)

    # State 2.
    state2.assignProperty(button, 'text', "Switch to state 3")
    state2.assignProperty(widget, 'geometry', QRectF(200, 150, 200, 150))
    state2.assignProperty(box, 'geometry', QRect(9, 150, 190, 150))
    state2.assignProperty(p1, 'pos', QPointF(68 - 150, 185 + 150))
    state2.assignProperty(p2, 'pos', QPointF(168, 185 + 150))
    state2.assignProperty(p3, 'pos', QPointF(268 + 150, 185 + 150))
    state2.assignProperty(p4, 'pos', QPointF(64, 48))
    state2.assignProperty(p5, 'pos', QPointF(168, 48))
    state2.assignProperty(p6, 'pos', QPointF(268, 48))
    state2.assignProperty(p1, 'rotation', -270.0)
    state2.assignProperty(p2, 'rotation', 90.0)
    state2.assignProperty(p3, 'rotation', 270.0)
    state2.assignProperty(p4, 'rotation', 0.0)
    state2.assignProperty(p5, 'rotation', 0.0)
    state2.assignProperty(p6, 'rotation', 0.0)
    state2.assignProperty(box_proxy, 'opacity', 1.0)
    state2.assignProperty(p1, 'opacity', 0.0)
    state2.assignProperty(p2, 'opacity', 0.0)
    state2.assignProperty(p3, 'opacity', 0.0)
    state2.assignProperty(p4, 'opacity', 1.0)
    state2.assignProperty(p5, 'opacity', 1.0)
    state2.assignProperty(p6, 'opacity', 1.0)

    # State 3.
    state3.assignProperty(button, 'text', "Switch to state 1")
    state3.assignProperty(p1, 'pos', QPointF(0, 5))
    state3.assignProperty(p2, 'pos', QPointF(0, 5 + 64 + 5))
    state3.assignProperty(p3, 'pos', QPointF(5, 5 + (64 + 5) + 64))
    state3.assignProperty(p4, 'pos', QPointF(5 + 64 + 5, 5))
    state3.assignProperty(p5, 'pos', QPointF(5 + 64 + 5, 5 + 64 + 5))
    state3.assignProperty(p6, 'pos', QPointF(5 + 64 + 5, 5 + (64 + 5) + 64))
    state3.assignProperty(widget, 'geometry', QRectF(138, 5, 400 - 138, 200))
    state3.assignProperty(box, 'geometry', QRect(5, 205, 400, 90))
    state3.assignProperty(p1, 'opacity', 1.0)
    state3.assignProperty(p2, 'opacity', 1.0)
    state3.assignProperty(p3, 'opacity', 1.0)
    state3.assignProperty(p4, 'opacity', 1.0)
    state3.assignProperty(p5, 'opacity', 1.0)
    state3.assignProperty(p6, 'opacity', 1.0)

    t1 = state1.addTransition(button.clicked, state2)
    animation_1sub_group = QSequentialAnimationGroup()
    animation_1sub_group.addPause(250)
    animation_1sub_group.addAnimation(QPropertyAnimation(box, b'geometry', state1))
    t1.addAnimation(animation_1sub_group)
    t1.addAnimation(QPropertyAnimation(widget, b'geometry', state1))
    t1.addAnimation(QPropertyAnimation(p1, b'pos', state1))
    t1.addAnimation(QPropertyAnimation(p2, b'pos', state1))
    t1.addAnimation(QPropertyAnimation(p3, b'pos', state1))
    t1.addAnimation(QPropertyAnimation(p4, b'pos', state1))
    t1.addAnimation(QPropertyAnimation(p5, b'pos', state1))
    t1.addAnimation(QPropertyAnimation(p6, b'pos', state1))
    t1.addAnimation(QPropertyAnimation(p1, b'rotation', state1))
    t1.addAnimation(QPropertyAnimation(p2, b'rotation', state1))
    t1.addAnimation(QPropertyAnimation(p3, b'rotation', state1))
    t1.addAnimation(QPropertyAnimation(p4, b'rotation', state1))
    t1.addAnimation(QPropertyAnimation(p5, b'rotation', state1))
    t1.addAnimation(QPropertyAnimation(p6, b'rotation', state1))
    t1.addAnimation(QPropertyAnimation(p1, b'opacity', state1))
    t1.addAnimation(QPropertyAnimation(p2, b'opacity', state1))
    t1.addAnimation(QPropertyAnimation(p3, b'opacity', state1))
    t1.addAnimation(QPropertyAnimation(p4, b'opacity', state1))
    t1.addAnimation(QPropertyAnimation(p5, b'opacity', state1))
    t1.addAnimation(QPropertyAnimation(p6, b'opacity', state1))

    t2 = state2.addTransition(button.clicked, state3)
    t2.addAnimation(QPropertyAnimation(box, b'geometry', state2))
    t2.addAnimation(QPropertyAnimation(widget, b'geometry', state2))
    t2.addAnimation(QPropertyAnimation(p1, b'pos', state2))
    t2.addAnimation(QPropertyAnimation(p2, b'pos', state2))
    t2.addAnimation(QPropertyAnimation(p3, b'pos', state2))
    t2.addAnimation(QPropertyAnimation(p4, b'pos', state2))
    t2.addAnimation(QPropertyAnimation(p5, b'pos', state2))
    t2.addAnimation(QPropertyAnimation(p6, b'pos', state2))
    t2.addAnimation(QPropertyAnimation(p1, b'rotation', state2))
    t2.addAnimation(QPropertyAnimation(p2, b'rotation', state2))
    t2.addAnimation(QPropertyAnimation(p3, b'rotation', state2))
    t2.addAnimation(QPropertyAnimation(p4, b'rotation', state2))
    t2.addAnimation(QPropertyAnimation(p5, b'rotation', state2))
    t2.addAnimation(QPropertyAnimation(p6, b'rotation', state2))
    t2.addAnimation(QPropertyAnimation(p1, b'opacity', state2))
    t2.addAnimation(QPropertyAnimation(p2, b'opacity', state2))
    t2.addAnimation(QPropertyAnimation(p3, b'opacity', state2))
    t2.addAnimation(QPropertyAnimation(p4, b'opacity', state2))
    t2.addAnimation(QPropertyAnimation(p5, b'opacity', state2))
    t2.addAnimation(QPropertyAnimation(p6, b'opacity', state2))

    t3 = state3.addTransition(button.clicked, state1)
    t3.addAnimation(QPropertyAnimation(box, b'geometry', state3))
    t3.addAnimation(QPropertyAnimation(widget, b'geometry', state3))
    t3.addAnimation(QPropertyAnimation(p1, b'pos', state3))
    t3.addAnimation(QPropertyAnimation(p2, b'pos', state3))
    t3.addAnimation(QPropertyAnimation(p3, b'pos', state3))
    t3.addAnimation(QPropertyAnimation(p4, b'pos', state3))
    t3.addAnimation(QPropertyAnimation(p5, b'pos', state3))
    t3.addAnimation(QPropertyAnimation(p6, b'pos', state3))
    t3.addAnimation(QPropertyAnimation(p1, b'rotation', state3))
    t3.addAnimation(QPropertyAnimation(p2, b'rotation', state3))
    t3.addAnimation(QPropertyAnimation(p3, b'rotation', state3))
    t3.addAnimation(QPropertyAnimation(p4, b'rotation', state3))
    t3.addAnimation(QPropertyAnimation(p5, b'rotation', state3))
    t3.addAnimation(QPropertyAnimation(p6, b'rotation', state3))
    t3.addAnimation(QPropertyAnimation(p1, b'opacity', state3))
    t3.addAnimation(QPropertyAnimation(p2, b'opacity', state3))
    t3.addAnimation(QPropertyAnimation(p3, b'opacity', state3))
    t3.addAnimation(QPropertyAnimation(p4, b'opacity', state3))
    t3.addAnimation(QPropertyAnimation(p5, b'opacity', state3))
    t3.addAnimation(QPropertyAnimation(p6, b'opacity', state3))

    machine.start()

    view = QGraphicsView(scene)
    view.show()

    sys.exit(app.exec())
