From aa03342b7178221f38c5c53a002247f5323559c2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jan=20Hubi=C4=8Dka?=
 <46065755+janhubicka@users.noreply.github.com>
Date: Wed, 23 Sep 2026 20:56:12 +0200
Subject: [PATCH] qtgui: expose Reset for Image Layer mix sliders

Continue the Phase C default/modified-state rollout with the six saved RGB mix
parameters in Image Layer.

Opt the three dark-offset channels and three RGB mixture weights into
ParameterPanel's real-default presentation. Reset targets are taken from a fresh
ParameterState, appear only when the saved value differs from that default, and
remain separate undoable gestures.

Keep the source-choice checkbox and Set by dark/neutral/infrared controls
unchanged: the former is a discrete mode and the latter are one-shot operations,
not numeric slider state.

Extend workspace churn so every image_layer mix key must expose both its keyed
spin box and default/reset metadata.
---
 src/qtgui/ImageLayerPanel.cpp     | 12 ++++++------
 src/qtgui/WorkspaceChurnSmoke.cpp |  7 +++++++
 2 files changed, 13 insertions(+), 6 deletions(-)

diff --git a/src/qtgui/ImageLayerPanel.cpp b/src/qtgui/ImageLayerPanel.cpp
index 481816cbe..ddef8c0aa 100644
--- a/src/qtgui/ImageLayerPanel.cpp
+++ b/src/qtgui/ImageLayerPanel.cpp
@@ -62,21 +62,21 @@ void ImageLayerPanel::setupUi() {
       [](const ParameterState &s) { return s.rparams.mix_dark.red; },
       [](ParameterState &s, double v) { s.rparams.mix_dark.red = v; },
       3.0, enableSimulated, false, QString(),
-      QStringLiteral("image_layer.mix_dark.red"));
+      QStringLiteral("image_layer.mix_dark.red"), true);
 
   addSliderParameter(
       tr("Mix dark (green)"), -3.0, 1.0, 1, 4, "", "",
       [](const ParameterState &s) { return s.rparams.mix_dark.green; },
       [](ParameterState &s, double v) { s.rparams.mix_dark.green = v; },
       3.0, enableSimulated, false, QString(),
-      QStringLiteral("image_layer.mix_dark.green"));
+      QStringLiteral("image_layer.mix_dark.green"), true);
 
   addSliderParameter(
       tr("Mix dark (blue)"), -3.0, 1.0, 1, 4, "", "",
       [](const ParameterState &s) { return s.rparams.mix_dark.blue; },
       [](ParameterState &s, double v) { s.rparams.mix_dark.blue = v; },
       3.0, enableSimulated, false, QString(),
-      QStringLiteral("image_layer.mix_dark.blue"));
+      QStringLiteral("image_layer.mix_dark.blue"), true);
 
   // Dark Area Button
   m_setDarkAreaBtn = addToggleButtonParameter(
@@ -92,21 +92,21 @@ void ImageLayerPanel::setupUi() {
       [](const ParameterState &s) { return s.rparams.mix_red; },
       [](ParameterState &s, double v) { s.rparams.mix_red = v; },
       1.0, enableSimulated, false, QString(),
-      QStringLiteral("image_layer.mix.red"));
+      QStringLiteral("image_layer.mix.red"), true);
 
   addSliderParameter(
       tr("Mix green"), -10.0, 10.0, 1, 2, "", "",
       [](const ParameterState &s) { return s.rparams.mix_green; },
       [](ParameterState &s, double v) { s.rparams.mix_green = v; },
       1.0, enableSimulated, false, QString(),
-      QStringLiteral("image_layer.mix.green"));
+      QStringLiteral("image_layer.mix.green"), true);
 
   addSliderParameter(
       tr("Mix blue"), -10.0, 10.0, 1, 2, "", "",
       [](const ParameterState &s) { return s.rparams.mix_blue; },
       [](ParameterState &s, double v) { s.rparams.mix_blue = v; },
       1.0, enableSimulated, false, QString(),
-      QStringLiteral("image_layer.mix.blue"));
+      QStringLiteral("image_layer.mix.blue"), true);
 
   // Neutral Area Button
   m_setNeutralAreaBtn = addToggleButtonParameter(
diff --git a/src/qtgui/WorkspaceChurnSmoke.cpp b/src/qtgui/WorkspaceChurnSmoke.cpp
index 825821e4a..a5b618549 100644
--- a/src/qtgui/WorkspaceChurnSmoke.cpp
+++ b/src/qtgui/WorkspaceChurnSmoke.cpp
@@ -821,6 +821,13 @@ if (!workflowSummary || !workflowToggle || !workflowStages ||
                      .arg(key));
             return;
           }
+          QToolButton *reset = findParameterResetButton(key);
+          if (!reset || !reset->property("parameterDefaultValue").isValid()) {
+            fail(QStringLiteral(
+                     "Workspace churn lost Image Layer default/reset metadata for %1")
+                     .arg(key));
+            return;
+          }
         }
         if (!imageLayerSourceChoice ||
             imageLayerSourceChoice->property("parameterKey").toString() !=