Okay - here's the jira (and a blog):
Jira: Node could use a getVisibleBounds() method
Blog: Getting the Visible Bounds of a Node
jeff
On Jun 11, 2014, at 9:37 AM, Stephen F Northover <steve.x.northo...@oracle.com>
wrote:
> This seems like a good enhancement request. Please enter a JIRA for it.
>
> Steve
>
> On 2014-06-11, 10:17 AM, Jeff Martin wrote:
>> Below is my poor man's getVisibleBounds. I'm using this so that my custom
>> text pane only needs to add child nodes for lines of text that are visible -
>> similar to how ListView and friends only add cell nodes for visible items. I
>> hope I'm on the right track - I was surprised that my web search for
>> getVisibleBounds() came up so empty. If nobody points out my idiocy, I'm
>> going to put this in a blog.
>>
>> jeff
>>
>> /**
>> * Returns the visible bounds for a node based on ancestor clips (or null if
>> no clipping found).
>> */
>> public static Bounds getVisibleBounds(Node aNode)
>> {
>> // Get parent visible bounds (if set, convert to local)
>> Bounds bounds = aNode.getParent()!=null?
>> getVisibleBounds(aNode.getParent()) : null;
>> if(bounds!=null) { if(!bounds.isEmpty()) bounds =
>> aNode.parentToLocal(bounds); else return bounds; }
>> // If node has clip, get clip local bounds (intersected with parent
>> visible bounds if present)
>> if(aNode.getClip()!=null) { Node clip = aNode.getClip(); Bounds cb =
>> clip.getBoundsInLocal();
>> bounds = bounds!=null? getIntersectingBounds(cb, bounds) : cb; }
>> // Return node visible bounds
>> return bounds;
>> }
>>
>> /**
>> * Returns the intersection bounds of two bounds.
>> */
>> public static Bounds getIntersectingBounds(Bounds b1, Bounds b2)
>> {
>> if(!b1.intersects(b2)) return new BoundingBox(0,0,-1,-1);
>> double minx = Math.max(b1.getMinX(), b2.getMinX());
>> double miny = Math.max(b1.getMinY(), b2.getMinY());
>> double maxx = Math.min(b1.getMaxX(), b2.getMaxX());
>> double maxy = Math.min(b1.getMaxY(), b2.getMaxY());
>> return new BoundingBox(minx, miny, maxx-minx, maxy-miny);
>> }
>>
>>
>> On Jun 10, 2014, at 6:59 PM, Jeff Martin <j...@reportmill.com> wrote:
>>
>>> What is the JFX equivalent of JComponent.getVisibleRect() - and is there a
>>> way to get a notification when it changes?
>>>
>>> jeff
>
