[replying back to the list] Ah.. well the trick here is that I need to apply a scale transform when taking the snapshot. I want to get an image that is a particular size and so I first need to know the bounds of the node so I can calculate the scale value. If I don't apply the transform while taking the snapshot the image may be far too large and trigger an out-of-memory error.
So I need the CSS and layout to happen BEFORE I take the snapshot so that I have the correct information to calculate the needed scale. Here is the full code: Parent p = n.getParent(); Scene s = new Scene(p); s.getStyleSheets().add(knownGoodStyleSheetURL); n.impl_processCSS(true); n.layout(); Bounds newBounds = n.getLayoutBounds(); double maxDim = Math.max(newBounds.getWidth(), newBounds.getHeight()); double scale = desiredSize / maxDim; SnapshotParameters snapParams = new SnapshotParameters(); snapParams.setFill(Color.TRANSPARENT); snapParams.setTransform(new Scale(scale, scale)); WritableImage theImage = n.snapshot(snapParams,null); I get the correct scale for the snapshot to make an image of the desired size, but the CSS is not applied properly. I don't think this should be so hard to do :-) Scott On Tue, Sep 24, 2013 at 7:56 PM, John Smith <john_sm...@symantec.com> wrote: > **Ø **I have a need to apply the CSS so when I 'snapshot' a node that > isn't in my scene, it looks correct.**** > > ** ** > > A snapshot applies css and performs a layout pass automatically before it > takes a snapshot.**** > > You can create a new dummy Scene (just for the snapshot) containing your > node (like Kevin does), then set the required stylesheets on the new Scene. > **** > > I don’t understand what the rest of your code does or why you manually > call impl_processCSS(true) or layout();**** > > ** ** > > // create a dummy scene so layout and CSS will work > Scene dummyScene = new Scene(new Group(node));**** > > dummyScene.getStyleSheets().addAll(…); > node.shapshot(...); > > **** > > ** ** > > *From:* Scott Palmer [mailto:swpal...@gmail.com] > *Sent:* Tuesday, September 24, 2013 4:35 PM > *To:* John Smith > *Cc:* Richard Bair (richard.b...@oracle.com); openjfx-...@openjdk.java.netList > > *Subject:* Re: PrefWidth/Height calculations only works if stage is shown* > *** > > ** ** > > On Wed, Aug 28, 2013 at 3:18 PM, John Smith <john_sm...@symantec.com> > wrote:**** > > I hadn't seen the applyCSS conversation, but looks like it was contained > deep in a node validation thread: > http://mail.openjdk.java.net/pipermail/openjfx-dev/2013-July/008549.html > > Looks like the request is already covered in RT-21206 as pointed out by > David. > Looks like the feature will show up some time post-Java8, which is why > there is nothing on Node now. > > For now, I stick with Kevin's node snapshot workaround: > // create a dummy scene so layout and CSS will work > new Scene(new Group(node)); > node.shapshot(...) > > Thanks for the info!**** > > ** ** > > I have a need to apply the CSS so when I 'snapshot' a node that isn't in > my scene, it looks correct.**** > > I'm doing this:**** > > Parent p = n.getParent(); // The node I want tosnapshot isn't > the root of the graph**** > > Scene s = KayakFXUtils.createDarkScene(p,1000,1000);**** > > n.impl_processCSS(true);**** > > n.layout();**** > > **** > > I get a reasonable size for the node, but the CSS isn't applied.**** > > ** ** > > I get a ton of warnings like this:**** > > ** ** > > WARNING: com.sun.javafx.css.StyleHelper calculateValue Could not resolve > '-fx-text-background-color' while resolving lookups for '-fx-text-fill' > from rule '*.label' in stylesheet > jar:file:/C:/Program%20Files%20(x86)/Java/jdk1.7.0_40/jre/lib/jfxrt.jar!/com/sun/javafx/scene/control/skin/caspian/caspian.bss > **** > > ** ** > > Ideas?**** > > ** ** >
