sketch: Add a way to turn an id into an index on the color model and depth models

krita/sketch/models/ColorDepthModel.cpp

@@ -89,3 +89,8 @@ QString ColorDepthModel::id(int index)
 
     return d->colorDepths.at(index).id();
 }
+
+int ColorDepthModel::indexOf(const QString& id)
+{
+    return d->colorDepths.indexOf(KoID(id));
+}

krita/sketch/models/ColorDepthModel.h

@@ -41,6 +41,7 @@ public:
     QString colorModelId() const;
 
     Q_INVOKABLE QString id(int index);
+    Q_INVOKABLE int indexOf(const QString& id);
 
 public Q_SLOTS:
     void setColorModelId(const QString& id);

krita/sketch/models/ColorModelModel.cpp

@@ -69,3 +69,8 @@ QString ColorModelModel::id(int index)
 
     return d->colorModels.at(index).id();
 }
+
+int ColorModelModel::indexOf(const QString& id)
+{
+    return d->colorModels.indexOf(KoID(id));
+}

krita/sketch/models/ColorModelModel.h

@@ -38,6 +38,7 @@ public:
     virtual QVariant data(const QModelIndex& index, int role) const;
 
     Q_INVOKABLE QString id(int index);
+    Q_INVOKABLE int indexOf(const QString& id);
 
 private:
     class Private;