PySide6 EasingCurvesDemonstration

easing_curve.py

from typing import Optional

from PySide6.QtCore import (
    Qt,
    Signal,
    QPropertyAnimation,
    QEasingCurve,
    QRectF,
    Property,
)
from PySide6.QtGui import QMouseEvent, QWheelEvent, QPaintEvent, QPainter, QColor, QFont
from PySide6.QtWidgets import (
    QWidget,
    QPushButton,
    QHBoxLayout,
    QDoubleSpinBox,
    QProgressBar,
    QComboBox,
    QVBoxLayout,
)


class EasingDemo(QWidget):
    def __init__(self, parent: Optional[QWidget] = None) -> None:
        super().__init__(parent)

        self.setWindowTitle("Easing Curve Demo")
        self.setMinimumSize(800, 200)

        self._easing_curves_combo_box = QComboBox()
        curves = [curve.name for curve in QEasingCurve.Type]
        for i, curve in enumerate(curves):
            if i > 0x2D:
                break
            self._easing_curves_combo_box.addItem(curve)
        self._easing_duration_dspin_box = QDoubleSpinBox()
        self._easing_duration_dspin_box.setRange(300, 5000)
        self._animate_btn = QPushButton("Start")
        self._animate_btn.clicked.connect(self.animate)
        self._animate_progress_bar = QProgressBar()
        self._animate_progress_bar.setRange(0, 500)

        layout = QHBoxLayout()
        left_part = QVBoxLayout()
        left_part.addWidget(self._easing_curves_combo_box)
        left_part.addWidget(self._easing_duration_dspin_box)
        left_part.addWidget(self._animate_btn)
        layout.addLayout(left_part)
        layout.addWidget(self._animate_progress_bar)
        self.setLayout(layout)

        self._simple_animation = QPropertyAnimation(self, b"value")

    @Property(int)
    def value(self):
        return self._animate_progress_bar.value()

    @value.setter
    def value(self, val):
        self._animate_progress_bar.setValue(val)

    def animate(self):
        self.set_easing_curve_type(self._easing_curves_combo_box.currentIndex())
        self._simple_animation.setDuration(self._easing_duration_dspin_box.value())
        self._simple_animation.setStartValue(0)
        self._simple_animation.setEndValue(500)
        self._simple_animation.start()

    def set_easing_curve_type(self, value):
        self._simple_animation.setEasingCurve(QEasingCurve.Type(value))


if __name__ == "__main__":
    from PySide6.QtWidgets import QApplication

    app = QApplication()

    w = EasingDemo()
    w.show()

    app.exec()