desktop: offer different colors for info tab titles

Add a preference option to set the color of the text on the information tab to
either MediumBlue, LightBlue or Black. The last two of these colors are meant
to enable areadable font contrast on displays with dark mode.
The choice is saved with the other preferences.

[Dirk Hohndel: this isn't really about dark mode, so changed many of the types
	       and variable names, changed the user visible texts, and
               addressed some whitespace issues]

Signed-off-by: willemferguson <willemferguson@zoology.up.ac.za>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

1 files changed, 24 insertions, 0 deletions

diff --git a/core/settings/qPrefDisplay.cpp b/core/settings/qPrefDisplay.cpp
index c733b0c6b..9425062dc 100644
--- a/core/settings/qPrefDisplay.cpp
+++ b/core/settings/qPrefDisplay.cpp
@@ -55,6 +55,7 @@ void qPrefDisplay::loadSync(bool doSync)
 	disk_mobile_scale(doSync);
 	disk_display_invalid_dives(doSync);
 	disk_show_developer(doSync);
+	disk_headerstyle_color(doSync);
 	if (!doSync) {
 		load_tooltip_position();
 		load_theme();
@@ -176,6 +177,29 @@ void qPrefDisplay::setCorrectFont()
 	prefs.display_invalid_dives = qPrefPrivate::propValue(keyFromGroupAndName(group, "displayinvalid"), default_prefs.display_invalid_dives).toBool();
 }
 
+void qPrefDisplay::set_headerstyle_color(enum headerstyle_color_values value)
+{
+	if (value != prefs.headerstyle_color) {
+		prefs.headerstyle_color = value;
+		disk_headerstyle_color(true);
+		emit instance()->headerstyle_colorChanged(value);
+	}
+}
+
+void qPrefDisplay::disk_headerstyle_color(bool doSync)
+{
+	static enum headerstyle_color_values current_state;
+	if (doSync) {
+		if (current_state != prefs.headerstyle_color) {
+			current_state = prefs.headerstyle_color;
+			qPrefPrivate::propSetValue(keyFromGroupAndName(group, "headerstyle_color"), prefs.headerstyle_color, default_prefs.headerstyle_color);
+		}
+	} else {
+		prefs.headerstyle_color = (enum headerstyle_color_values)qPrefPrivate::propValue(keyFromGroupAndName(group, "headerstyle_color"), default_prefs.headerstyle_color).toInt();
+		current_state = prefs.headerstyle_color;
+	}
+}
+
 HANDLE_PROP_QSTRING(Display, "FileDialog/LastDir", lastDir);
 
 HANDLE_PROP_QSTRING(Display, "Theme/currentTheme", theme);