[PATCH] kconfig qconf: Add grey background for hidden options

[Maxime Chretien <maxime.chretien@bootlin.com>]

This is useful to see which configuration parameters can be edited
or not when "Show All Options" is enabled.

Signed-off-by: Maxime Chretien <maxime.chretien@bootlin.com>
---
 scripts/kconfig/qconf.cc | 7 +++++++
 scripts/kconfig/qconf.h  | 4 ++++
 2 files changed, 11 insertions(+)

diff --git a/scripts/kconfig/qconf.cc b/scripts/kconfig/qconf.cc
index c0ac8f7b5f1a..be9ff4651da1 100644
--- a/scripts/kconfig/qconf.cc
+++ b/scripts/kconfig/qconf.cc
@@ -208,6 +208,13 @@ void ConfigItem::updateMenu(void)
 	}
 	if (!sym_has_value(sym) && visible)
 		prompt += " (NEW)";
+
+	if(!visible) {
+		setBackground(promptColIdx, QBrush(QColor("#E0E0E0")));
+	} else {
+		setBackground(promptColIdx, QBrush());
+	}
+
 set_prompt:
 	setText(promptColIdx, prompt);
 }
diff --git a/scripts/kconfig/qconf.h b/scripts/kconfig/qconf.h
index c879d79ce817..79e47e8c1ae7 100644
--- a/scripts/kconfig/qconf.h
+++ b/scripts/kconfig/qconf.h
@@ -174,6 +174,10 @@ class ConfigItem : public QTreeWidgetItem {
 	{
 		return Parent::text(idx);
 	}
+	void setBackground(colIdx idx, const QBrush& brush)
+	{
+		Parent::setBackground(idx, brush);
+	}
 	void setPixmap(colIdx idx, const QIcon &icon)
 	{
 		Parent::setIcon(idx, icon);
-- 
2.27.0