qtmaildir settings: the colour dialog follows the desktop's dark style

QtQuick.Dialogs' ColorDialog opened light on the dark desktop. It paints
from the Qt Quick palette, which qt6ct leaves at Qt's default here: its
custom_palette is off and the dark comes from the kvantum-dark widget
style, which Qt Quick does not use. Qt.labs.platform's ColorDialog falls
back to the widget QColorDialog in a QApplication, which this process
already is for the tray menus, and widgets take the kvantum style like
every other application.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

1 files changed, 13 insertions, 6 deletions

diff --git a/desktop/modules/qtmaildir/ColourPick.qml b/desktop/modules/qtmaildir/ColourPick.qml
index 96933a9..12c6f70 100644
--- a/desktop/modules/qtmaildir/ColourPick.qml
+++ b/desktop/modules/qtmaildir/ColourPick.qml
@@ -10,11 +10,18 @@
 // GNU General Public License for more details.
 
 import QtQuick
-import QtQuick.Dialogs
+import Qt.labs.platform as P
 import "../.."
 
-// A swatch of the current colour that opens the platform's colour dialog.
-// picked carries the choice as #rrggbb, the form qtmaildir.conf uses.
+// A swatch of the current colour that opens a colour dialog. picked carries
+// the choice as #rrggbb, the form qtmaildir.conf uses.
+//
+// Qt.labs.platform, not QtQuick.Dialogs: the Quick dialog paints from the
+// Qt Quick palette, which qt6ct leaves at Qt's light default here
+// (custom_palette=false; the dark comes from the kvantum-dark widget style),
+// so it opened light on a dark desktop. This one falls back to the widget
+// QColorDialog in a QApplication, which shell.qml's UseQApplication pragma
+// makes this process, and widgets take the kvantum style like every app.
 Rectangle {
     id: pick
     property string colour: ""
@@ -43,11 +50,11 @@ Rectangle {
         onClicked: dialog.open()
     }
 
-    ColorDialog {
+    P.ColorDialog {
         id: dialog
-        selectedColor: /^#[0-9a-fA-F]{6}$/.test(pick.colour) ? pick.colour : "#808080"
+        currentColor: /^#[0-9a-fA-F]{6}$/.test(pick.colour) ? pick.colour : "#808080"
         // toString() is #rrggbb for an opaque colour, and the dialog offers
         // no alpha unless asked to; the slice is a guard all the same.
-        onAccepted: pick.picked(selectedColor.toString().slice(0, 7))
+        onAccepted: pick.picked(color.toString().slice(0, 7))
     }
 }