Unlike other JavaFX controls, the scrollbars of a WebView are not enlarged when Windows is set to a DPI resolution greater than 100% (= 96 DPI).
As a demonstration I uploaded two screenshots of a JavaFX application I'm working on, one at 96 DPI (100%) and one at 144 DPI (150%). The lower pane is a WebView, the upper a TableView. As you can see all scrollbars are the same width at 96 DPI, but the WebView's are not correctly enlarged at 144 DPI. This affects both horizontal and vertical scrollbar.
http://kynosarges.org/images/dpi/WebView-96.png
http://kynosarges.org/images/dpi/WebView-144.png
Incidentally, I noticed the same issue in RSSOwl which is based on the Eclipse framework: at high Windows DPI, the HTML browser window has a narrower scrollbar than other scroll panes. Possibly WebView code was copied from there?
As a demonstration I uploaded two screenshots of a JavaFX application I'm working on, one at 96 DPI (100%) and one at 144 DPI (150%). The lower pane is a WebView, the upper a TableView. As you can see all scrollbars are the same width at 96 DPI, but the WebView's are not correctly enlarged at 144 DPI. This affects both horizontal and vertical scrollbar.
http://kynosarges.org/images/dpi/WebView-96.png
http://kynosarges.org/images/dpi/WebView-144.png
Incidentally, I noticed the same issue in RSSOwl which is based on the Eclipse framework: at high Windows DPI, the HTML browser window has a narrower scrollbar than other scroll panes. Possibly WebView code was copied from there?