feat: add focus with AlphabetCategory when change to another word.

[wjyrich]

as title.

PMS-BUG-289159

[sourcery-ai]

Reviewer's Guide

This PR implements a new currentCategory-driven focus mechanism in the alphabet category popup by introducing a delayed index-setting timer, exposes helper APIs in the grid container, and updates the app list view to trigger the new focus behavior when switching categories.

Sequence Diagram: Alphabet Category Focus Update

sequenceDiagram
    actor User
    participant AppListView
    participant AlphabetCategoryPopup
    participant setIndexTimer
    participant alphabetCategoryContainer

    User->>AppListView: Clicks alphabet section (e.g., "S") OR Clicks letter in AlphabetCategoryPopup
    alt User clicks section in AppListView
        AppListView->>AlphabetCategoryPopup: setCurrentCategory("S")
    else User clicks letter in AlphabetCategoryPopup
        AlphabetCategoryPopup->>AlphabetCategoryPopup: setCurrentCategory("S") via onCategoryClicked
    end

    AlphabetCategoryPopup->>AlphabetCategoryPopup: currentCategory = "S"
    AlphabetCategoryPopup->>setIndexTimer: category = "S"
    AlphabetCategoryPopup->>setIndexTimer: restart()

    Note over setIndexTimer: Timer waits for 'interval' (10ms)

    setIndexTimer->>setIndexTimer: onTriggered()
    setIndexTimer->>alphabetCategoryContainer: model = alphabetCategoryDelegateModel.model
    loop Find category in model
        setIndexTimer->>setIndexTimer: if (model[i] === category)
    end
    opt Category found
        setIndexTimer->>alphabetCategoryContainer: highlightMoveDuration = 0
        setIndexTimer->>alphabetCategoryContainer: currentIndex = foundIndex
        setIndexTimer->>alphabetCategoryContainer: highlightMoveDuration = originalDuration
    end

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Class Diagram: QML Component Updates for Alphabet Navigation

classDiagram
  class AlphabetCategoryPopup {
    +string currentCategory
    +setCurrentCategory(category: string)
    -Timer setIndexTimer
  }
  class GridViewContainer {
    +currentIndex: alias
    +highlightMoveDuration: alias
    +setCurrentIndex(index: int)
  }
  class AppListView {
    %% No new public members, but existing methods call AlphabetCategoryPopup's new method
  }
  AppListView ..> AlphabetCategoryPopup : calls setCurrentCategory()
  AlphabetCategoryPopup ..> GridViewContainer : uses features of (as internal alphabetCategoryContainer)

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File-Level Changes

Change	Details	Files
Add currentCategory and delayed focus logic in AlphabetCategoryPopup	Introduced currentCategory property and setCurrentCategory() method Added Timer to defer scrolling until model updates Disabled highlightMoveDuration temporarily to jump without animation Added onCurrentCategoryChanged handler to restart the timer	qml/windowed/AlphabetCategoryPopup.qml
Expose and control currentIndex and highlightMoveDuration in GridViewContainer	Added aliases for currentIndex and highlightMoveDuration Implemented setCurrentIndex() helper method	qml/windowed/GridViewContainer.qml
Trigger popup focus update in AppListView when category changes	Call setCurrentCategory() when opening popup on section click Call setCurrentCategory() in onCategoryClicked before closing list	qml/windowed/AppListView.qml

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[deepin-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: 18202781743, wjyrich

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• debian/deepin/OWNERS

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[wjyrich]

/forcemerge

[deepin-bot]

This pr force merged! (status: blocked)