JavaFX拖拽未修饰阶段“故障”问题

Question

我有一个未装饰的舞台，里面有一个定制的标题栏。这个标题栏包含“图标按钮”，它们只是保存图像视图的堆叠窗格。

我还使用此代码通过标题栏（静态编程语言代码）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
    }
}

现在的问题是，即使鼠标在其中一个“图标按钮”上，舞台也是可以拖动的。对于普通的JavaFX按钮，这似乎不是问题。我不明白为什么会这样，以及如何解决它。

Answer 1

检查PickResult似乎工作得很好（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
    }
}