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DnD in Compose

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April 04, 2025
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DnD in Compose

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punchdrunker

April 04, 2025

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Transcript

  1. DnD in Compose @punchdrunker 2025/4/4

  2. 自己紹介 - 2010〜 Android / iOS Dev - Director of

    DroidKaigi Association - MNG - Tamagotchi Connect

  3. ComposeでもDnD(ドラッグアンドドロップ)できる? - Jetpack Compose 1.6からDnDサポート追加 - 具体的には dragAndDropSource と dragAndDropTarget

    を使う - Viewベースと同じく ClipData でデータを渡せる

  4. 最小限の実装の流れ 構成 - Modifier.dragAndDropSource → ドラッグしたいもの - ClipDataで中身を渡す - Modifier.dragAndDropTarget

    → ドロップ先 - DragAndDropEventでイベント受け取り 📦 データの受け渡しは ClipData.newPlainText("label", "value") みたいな感じ

  5. example: dragAndDropSource

  6. example: dragAndDropTarget 1/2

  7. example: dragAndDropTarget 2/2 onDropだけ 実装必須

  8. example: DragAndDropEvent - DragAndDropEvent - mimeType - DragEvent - Offset

    - ClipData - …(たくさん)

  9. まとめ まとめ: - ComposeでもDnDができるようになった - Modifierベースで導入も簡単 - ClipDataとDragAndDropEventの理解がポイント - 外部アプリからのDnD対応もできそうなのでやってみたい

    - ファイルDnDなども試す予定！

  10. Resources - actual code: https://github.com/punchdrunker/compose-drag-and-drop/blob/main/app/src/ main/java/com/example/myapplication/MainActivity.kt - overview: https://developer.android.com/reference/kotlin/androidx/compose/foundation/d raganddrop/package-summary

    -