fix: delay enable taskmanager icon position animation

[BLumia]

避免一开始就启用动画,导致新图标会有从初始位置(0)飞入的视觉效果

PMS: BUG-353933

Summary by Sourcery

Bug Fixes:

• Prevent newly added task manager icons from animating in from an incorrect initial position by deferring the start of position animations until after layout completion.

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Delays enabling position animations for task manager icons so that new icons don’t visually fly in from position 0, by gating x/y Behaviors behind a runtime flag that is turned on after component initialization.

Sequence diagram for delayed enabling of taskmanager icon position animation

sequenceDiagram
    participant QMLRuntime
    participant AppItemRect
    participant Qt
    participant Behaviors

    QMLRuntime->>AppItemRect: Instantiate AppItemRect
    AppItemRect->>AppItemRect: positionAnimationEnabled = false
    AppItemRect->>Behaviors: Behaviors on x,y created (enabled = false)

    QMLRuntime-->>AppItemRect: Component.onCompleted
    AppItemRect->>Qt: Qt.callLater(callback)
    Qt-->>AppItemRect: Invoke callback
    AppItemRect->>AppItemRect: positionAnimationEnabled = true
    AppItemRect->>Behaviors: enabled = true

    QMLRuntime->>AppItemRect: Later change x,y (icon moves)
    AppItemRect->>Behaviors: x,y changed with enabled = true
    Behaviors->>AppItemRect: Animate x,y with NumberAnimation

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Class diagram for TaskManager appItemRect QML object

classDiagram
    class AppItemRect {
        bool positionAnimationEnabled
        onCompleted()
        onXBehavior()
        onYBehavior()
    }

    class NumberAnimationX {
        duration : int = 200
        easingType : EasingType = OutCubic
    }

    class NumberAnimationY {
        duration : int = 200
        easingType : EasingType = OutCubic
    }

    AppItemRect "1" *-- "1" NumberAnimationX : Behavior_on_x
    AppItemRect "1" *-- "1" NumberAnimationY : Behavior_on_y

    class QtHelper {
        callLater(callback)
    }

    AppItemRect ..> QtHelper : uses_callLater
    AppItemRect : positionAnimationEnabled controls Behavior.enabled
    NumberAnimationX : enabled depends_on AppItemRect.positionAnimationEnabled
    NumberAnimationY : enabled depends_on AppItemRect.positionAnimationEnabled

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File-Level Changes

Change	Details	Files
Gate task manager icon position animations behind a delayed-enable flag to avoid initial fly-in from origin.	Assign an id to the transparent Rectangle that mirrors delegateRoot geometry so it can host local state. Add a boolean property to track whether position animations are enabled. Update x and y Behaviors to be conditionally enabled based on the new flag. Use Component.onCompleted with Qt.callLater to enable the flag only after initial layout has stabilized.	panels/dock/taskmanager/package/TaskManager.qml

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[deepin-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: BLumia, Ivy233, wjyrich

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• debian/deepin/OWNERS

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