chore(cpn): move exclusivecombogroup to shared (#6754)

companion/src/shared/exclusivecombogroup.cpp

@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) EdgeTX
+ *
+ * Based on code named
+ *   opentx - https://github.com/opentx/opentx
+ *   th9x - http://code.google.com/p/th9x
+ *   er9x - http://code.google.com/p/er9x
+ *   gruvin9x - http://code.google.com/p/gruvin9x
+ *
+ * License GPLv2: http://www.gnu.org/licenses/gpl-2.0.html
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include "exclusivecombogroup.h"
+
+#include <QListView>
+
+ExclusiveComboGroup::ExclusiveComboGroup(QObject *parent,
+                                         std::function<bool(const QVariant&)> filter) :
+  QObject(parent),
+  filter(std::move(filter))
+{
+}
+
+void ExclusiveComboGroup::addCombo(QComboBox *comboBox)
+{
+  connect(comboBox, QOverload<int>::of(&QComboBox::activated), [=](int index) {
+    this->handleActivated(comboBox, index);
+  });
+
+  combos.append(comboBox);
+}
+
+void ExclusiveComboGroup::handleActivated(QComboBox* target, int index)
+{
+  auto data = target->itemData(index);
+  auto targetidx = combos.indexOf(target);
+
+  for (auto combo : combos) {
+    if (target == combo)
+      continue;
+
+    auto view = dynamic_cast<QListView*>(combo->view());
+    Q_ASSERT(view);
+
+    auto previous = combo->findData(targetidx, _role);
+
+    if (previous >= 0) {
+      view->setRowHidden(previous, false);
+      combo->setItemData(previous, QVariant(), _role);
+    }
+
+    if (!filter(data)) {
+      auto idx = combo->findData(data);
+
+      if (idx >= 0) {
+        view->setRowHidden(idx, true);
+        combo->setItemData(idx, targetidx, _role);
+      }
+    }
+  }
+}