JavaFX拖动未修饰的阶段“ Fallthrough”问题

Question

我有一个未经修饰的舞台，其中有一个自定义标题栏。该标题栏包含“ IconButton”，它们只是持有ImageViews的StackPanes。

我还使用此代码通过标题栏（科特琳代码）使舞台可拖动：

fun makeDraggable(stage: Stage, byNode: Node) {

    val dragDelta = Delta()

    byNode.setOnMousePressed { e ->
        if (stage.isFullScreen || stage.isMaximized) {
            return@setOnMousePressed
        }

        dragDelta.x = stage.x - e.screenX
        dragDelta.y = stage.y - e.screenY
    }

    byNode.setOnMouseDragged { e ->
        if (stage.isFullScreen || stage.isMaximized) {
            return@setOnMouseDragged
        }

        stage.x = e.screenX + dragDelta.x
        stage.y = e.screenY + dragDelta.y
    }
}

现在，问题在于，即使鼠标悬停在这些“ IconButton”之一上，也可以拖动舞台。对于普通的JavaFX Button，这似乎不是问题。我看不到为什么会这样，如何解决。

Answer 1

检查pickResult似乎可以正常工作（感谢fabian）：

fun makeDraggable(stage: Stage, byNode: Node) {

    val dragDelta = Delta()

    var validTarget = true

    byNode.setOnMousePressed { e ->
        if (stage.isFullScreen || stage.isMaximized) {
            return@setOnMousePressed
        }

        val pickedNode = e.pickResult.intersectedNode

        if (pickedNode is IconButton) {
            validTarget = false
            return@setOnMousePressed
        }
        if (pickedNode.parent is IconButton) {
            validTarget = false
            return@setOnMousePressed
        }

        dragDelta.x = stage.x - e.screenX
        dragDelta.y = stage.y - e.screenY
    }

    byNode.setOnMouseReleased { e ->
        if (stage.isFullScreen || stage.isMaximized) {
            return@setOnMouseReleased
        }
        validTarget = true
    }

    byNode.setOnMouseDragged { e ->
        if (stage.isFullScreen || stage.isMaximized) {
            return@setOnMouseDragged
        }

        if (!validTarget) {
            return@setOnMouseDragged
        }

        stage.x = e.screenX + dragDelta.x
        stage.y = e.screenY + dragDelta.y
    }
}