Hello, I am facing a problem integrating my custom...

# compose-desktop

[Vlad Gorbunov]

Hello, I am facing a problem integrating my custom cursors in compose app on desktop

My implementation is:

public actual val PointerIcon.Companion.ZoomIn: PointerIcon
    get() = customZoomInCursor

public actual val PointerIcon.Companion.ZoomOut: PointerIcon
    get() = customZoomOutCursor

private val customZoomInCursor: PointerIcon by lazy {
    val toolkit = Toolkit.getDefaultToolkit()
    val customCursor = toolkit.createCustomCursor(DesignRes.images.cursor_zoom_in.image, Point(8, 8), "ZoomIn")
    PointerIcon(customCursor)
}

private val customZoomOutCursor: PointerIcon by lazy {
    val toolkit = Toolkit.getDefaultToolkit()
    val customCursor = toolkit.createCustomCursor(DesignRes.images.cursor_zoom_out.image, Point(8, 8), "ZoomOut")
    PointerIcon(customCursor)
}

I try to switch between them when my image scale changes

.pointerHoverIcon(if (scale >= 2f) PointerIcon.ZoomOut else PointerIcon.ZoomIn)

However, cursors do not change.
Upon investigating, I found out that internal AwtCursor does not implement hashCode and simply uses cursor.type value. Which is always -1 for both since it is a custom type indicator

public static final int CUSTOM_CURSOR = -1;

I've also found there is PointerIconService , but its internal and I can't plug my own.

Has anybody had same issue? How do I use multiple custom cursors?

[Vlad Gorbunov]

AwtCursor equals looks like this

override fun equals(other: Any?): Boolean {
    if (this === other) return true
    if (javaClass != other?.javaClass) return false

    other as AwtCursor

    // AwtCursor doesn't implement equals
    if (cursor.type != other.cursor.type) return false

    return true
}

I think comparing cursor.type + cursor.name would do the trick

[Vlad Gorbunov]

tried 1.9.3 and 1.10.0-beta02 and it behaves the same

[Alexander Maryanovsky]

Please submit a bug report on YouTrack

[adte]

I faced the same bug, I have a workaround but it can introduce some flicker: https://kotlinlang.slack.com/archives/C01D6HTPATV/p1741387168081589

[Vlad Gorbunov]

Oh, thank for suggestion, will give it a try

[Vlad Gorbunov]

Also, thanx for fixing this
https://youtrack.jetbrains.com/issue/CMP-9371/CMP-desktop-switching-between-custom-cursors