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ZoomAnimation

Qt Base Class: QParallelAnimationGroup

Signature: QParallelAnimationGroup(self, parent: Optional[PySide6.QtCore.QObject] = None) -> None

Base classes

Name Children Inherits
ParallelAnimationGroup
prettyqt.core.parallelanimationgroup

⋔ Inheritance diagram

graph TD
  1473293659936["animations.ZoomAnimation"]
  1473299842352["core.ParallelAnimationGroup"]
  1473299826736["core.AnimationGroupMixin"]
  1473299791600["core.AbstractAnimationMixin"]
  1473299815024["core.ObjectMixin"]
  140713234304496["builtins.object"]
  1473289073552["QtCore.QParallelAnimationGroup"]
  1473289072576["QtCore.QAnimationGroup"]
  1473289055008["QtCore.QAbstractAnimation"]
  1473288842240["QtCore.QObject"]
  1473291690208["Shiboken.Object"]
  1473299842352 --> 1473293659936
  1473299826736 --> 1473299842352
  1473299791600 --> 1473299826736
  1473299815024 --> 1473299791600
  140713234304496 --> 1473299815024
  1473289073552 --> 1473299842352
  1473289072576 --> 1473289073552
  1473289055008 --> 1473289072576
  1473288842240 --> 1473289055008
  1473291690208 --> 1473288842240
  140713234304496 --> 1473291690208

🛈 DocStrings

Bases: ParallelAnimationGroup

Source code in prettyqt\animations\zoomanimation.py 
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class ZoomAnimation(core.ParallelAnimationGroup):
    ID = "zoom"

    def __init__(
        self,
        duration: int = 1000,
        start: float = 1.0,
        end: float = 1.0,
        easing: core.easingcurve.TypeStr = "in_out_sine",
        anchor: AnchorStr = "center",
        parent: core.QObject | None = None,
    ):
        self._start = start
        self._end = end
        self._anchor = anchor
        super().__init__(parent)
        # size change animation
        self.anim1 = core.PropertyAnimation()
        # slide animation
        self.anim2 = core.PropertyAnimation()
        self.apply_to(parent)
        self.set_easing(easing)
        self.set_start_value(start)
        self.set_end_value(end)
        self.set_duration(duration)
        self.addAnimation(self.anim1)
        self.addAnimation(self.anim2)

    def set_start_value(self, factor: float):
        size = self.parent().size()
        self._start = factor
        self.anim1.setStartValue(size)
        self.anim2.setStartValue(self.parent().pos())

    def set_end_value(self, factor: float):
        self._end = factor
        zoom_ratio = self._end / self._start
        # setup zoom
        size = self.parent().size()
        new = size.toSizeF() * zoom_ratio * zoom_ratio
        self.anim1.setEndValue(new.toSize())
        # setup move
        move_x = -zoom_ratio * self.parent().width()
        move_y = -zoom_ratio * self.parent().height()
        match self._anchor:
            case "center":
                movement = core.Point(int(move_x / 2), int(move_y / 2))
            case "left":
                movement = core.Point(0, int(move_y / 2))
            case "right":
                movement = core.Point(int(move_x), int(move_y / 2))
            case "top":
                movement = core.Point(int(move_x / 2), 0)
            case "bottom":
                movement = core.Point(int(move_x / 2), int(move_y))
        self.anim2.setEndValue(self.parent().pos() + movement)

    def set_duration(self, duration: int):
        self.anim1.setDuration(duration)
        self.anim2.setDuration(duration)

    def set_easing(self, easing: core.easingcurve.TypeStr | core.QEasingCurve.Type):
        self.anim1.set_easing(easing)
        self.anim2.set_easing(easing)

    def apply_to(self, obj: widgets.QWidget):
        self.anim1.apply_to(obj.size)
        self.anim2.apply_to(obj.pos)

    def start(self, *args, **kwargs):
        # update values before starting
        self.set_start_value(self._start)
        self.set_end_value(self._end)
        super().start(*args, **kwargs)

⌗ Property table

Qt Property Type Doc
objectName QString
state QAbstractAnimation::State
loopCount int
currentTime int
currentLoop int
direction QAbstractAnimation::Direction
duration int