ItemDragHelper.java 文件源码

public DragBounds(final List<DragBounds> dragBoundses) {
     minX = new SimpleDoubleProperty(Double.MIN_VALUE);
     maxX = new SimpleDoubleProperty(Double.MAX_VALUE);
     minY = new SimpleDoubleProperty(Double.MIN_VALUE);
     maxY = new SimpleDoubleProperty(Double.MAX_VALUE);

    for (final DragBounds dragBounds : dragBoundses) {
        if (dragBounds.minX.get() > minX.get()) {
            minX = dragBounds.minX;
        }

        if (dragBounds.maxX.get() < maxX.get()) {
            maxX = dragBounds.maxX;
        }

        if (dragBounds.minY.get() > minY.get()) {
            minY = dragBounds.minY;
        }

        if (dragBounds.maxY.get() < maxY.get()) {
            maxY = dragBounds.maxY;
        }
    }

}