diff -r 4cfd0dd17fa5 -r 380b1331ad2e designer/RangedSliderPlugin.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/designer/RangedSliderPlugin.h	Wed Mar 30 23:15:08 2022 +0200
@@ -0,0 +1,54 @@
+/*
+ * RangedSliderPlugin.h is part of bmsapp.
+ *
+ * bmsapp is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+
+ * bmsapp 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.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _RANGEDSLIDERPLUGIN_H
+#define	_RANGEDSLIDERPLUGIN_H
+
+#include <QObject>
+#include <QString>
+#include <QWidget>
+#include <QIcon>
+#include <QtUiPlugin/QDesignerCustomWidgetInterface>
+
+class RangedSliderPlugin;
+
+class RangedSliderPlugin : public QObject, public QDesignerCustomWidgetInterface
+{
+   Q_OBJECT
+   Q_PLUGIN_METADATA(IID "org.qt-project.Qt.QDesignerCustomWidgetCollectionInterface")
+   Q_INTERFACES(QDesignerCustomWidgetInterface)
+           
+public:
+   RangedSliderPlugin(QObject* parent = nullptr);
+   
+   bool isContainer() const;
+   bool isInitialized() const;
+   QIcon icon() const;
+   QString domXml() const;
+   QString group() const;
+   QString includeFile() const;
+   QString name() const;
+   QString toolTip() const;
+   QString whatsThis() const;
+   QWidget *createWidget(QWidget *parent);
+   void initialize(QDesignerFormEditorInterface *core);
+
+private:
+   bool initialized = false;
+};
+
+#endif