On Tue, 7 Feb 2023 23:14:23 GMT, Damon Nguyen <dngu...@openjdk.org> wrote:
>> Before the fix, a JComboBox in Nimbus L&F would have normal black text even >> when the JComboBox was disabled if SynthComboBoxRenderer was replaced with a >> DefaultListCellRenderer. This text should be greyed out like in other L&F's. >> When looking into the defaults for Nimbus L&F files for attributes and >> states of a JComboBox, it confirm that the intention for disabled >> JComboBoxes is nimbusDisabledText (which is grey text). >> >> SynthComboBoxes have an additional check in its default >> SynthComboBoxRenderer that enables/disables the renderer itself. The >> SynthComboBoxRenderer inherits its enabled state from the parent ComboBox. >> Since the renderer with DefaultListCellRenderer is in a separate class >> without a reference to the comboBox, a listener was added to SynthComboBoxUI. >> >> An additional issue occurred in DefaultListCellRenderer because the renderer >> overrode the listener's re-assigned enabled state. In testing, setting the >> enabled state in DefaultListCellRenderer is redundant for all L&F's and is >> not needed here. However, instead of removing it altogether, a conditional >> was added specifically to allow ComboBoxes to skip setting enabled state >> here. >> >> After the fix, the Nimbus JComboBox with DLCR set matches the appearance of >> a normal Nimbus JComboBox. I can enable/disable the JComboBoxes in the test, >> and the UI elements behave and appear as expected. > > Damon Nguyen has updated the pull request incrementally with one additional > commit since the last revision: > > Update years. Add conditional `SynthComboBoxUI.createRenderer` points to `SynthComboBoxRenderer `so I think `DefaultListCellRenderer `should not come into picture for rendering cells in the list which should go via `getListCellRendererComponent`. If it is playing a part, then how it works in other L&F which also has it own renderer (for example, `BasicComboBoxUI.createRenderer` points to `BasicComboBoxRenderer`, AquaComboBox points to `AquaComboBoxRenderer`) and they dont have this listener to make it work, so the question why do we need a listener for Synth still not clear to me.. ------------- PR: https://git.openjdk.org/jdk/pull/12390
