> Previously while tabbing through the JTable cell, the cell highlighter/focus > ring was not visible against the selection background. > > Changes are made to Aqua LAF to derive a lighter focus ring color by changing > saturation and setting brightness component to 100% of original focus ring > color so that it is visible while tabbing through `JTable` cells. A new > method is added for this purpose which takes in `focusRingColor`, does > adjustment to saturation and brightness and returns a new focus ring color. > There are edge cases where the HSB transformation does not yield the right > focus ring color, for these cases a default color is returned. > > **Edge Cases** >  > > The edge case condition consists of two parts – > To handle white/black colors - (hsbValues[0] == 0 && hsbValues[1] == 0) - > representing hue and saturation of zero obtained for black, white or exactly > grey (red=green=color) conditions > To handle grayish colors - hsbValues[1] <= satGrayScale where satGrayScale <= > 0.10 . For any given hue and brightness, a saturation of less than or equal > to 10% represents grayish tint colors. > (The second case was added to accommodate grayish focus ring color returned > by system when Accent color = Graphite. The returned color is not exactly > gray but grayish (r=135, g=135, b=140)). > To accommodate a more generic case of grayish colors, the satGrayScale has a > threshold or buffer of 0.10 or 10%. > > Used the following resources to test out different grayish colors and optimal > saturation offsets used in `deriveLighterFocusRing()`. > > - [RapidTables](https://www.rapidtables.com/convert/color/rgb-to-hsl.html) > - [Colorizer](http://colorizer.org/). > - [Chart Link](https://codepen.io/HunorMarton/details/eWvewo) > > A test case is added to compare the RGB difference between the original focus > ring color & selection background and the new focus ring color & selection > background. > > PS: The native L&F (Mac OS) and Swing L&F for JTable cell tabbing differs (on > native tables the cell background turns white on focus with a cell focus > ring). Since the background for Swing tables can be set by users and also > overridden by subclassing `DefaultTableCellRenderer`, and to adhere to > current implementation of Swing, the white cell background changes are not > incorporated. Only the Focus Ring/ Cell Highlighter is made more prominent.
Harshitha Onkar has updated the pull request incrementally with one additional commit since the last revision: chnaged variable name ------------- Changes: - all: https://git.openjdk.java.net/jdk/pull/7768/files - new: https://git.openjdk.java.net/jdk/pull/7768/files/d13e37f8..a1c17b7a Webrevs: - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=7768&range=11 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=7768&range=10-11 Stats: 12 lines in 1 file changed: 0 ins; 0 del; 12 mod Patch: https://git.openjdk.java.net/jdk/pull/7768.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/7768/head:pull/7768 PR: https://git.openjdk.java.net/jdk/pull/7768
