--- a
+++ b/GUI/volumewidget/volumewidgetif.h
@@ -0,0 +1,59 @@
+/* Copyright (C) 2015 J.F.Dockes
+ * This program 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the
+ * Free Software Foundation, Inc.,
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+#ifndef VOLUMEWIDGETIF_INCLUDED
+#define VOLUMEWIDGETIF_INCLUDED
+#include <QWidget>
+#include <QString>
+
+// Abstract interface for a volume control.
+class VolumeWidgetIF : public QWidget {
+ Q_OBJECT;
+
+public:
+ VolumeWidgetIF(QWidget *parent = 0)
+ : QWidget(parent) {
+ }
+ virtual ~VolumeWidgetIF() {}
+
+public slots:
+ // Volume range is always enforced as 0-100
+
+ // Set value and do whatever we do when volume changes (emit
+ // signals)
+ virtual void set(int value) = 0;
+ // Increment/decrement value and do whatever we do when volume
+ // changes (emit signals)
+ virtual void step(int steps) = 0;
+ // Set-up display, keep quiet
+ virtual void setUi(int value) = 0;
+ virtual void setMuteUi(bool) = 0;
+
+ virtual void volumeHigher() {
+ step(5);
+ }
+ virtual void volumeLower() {
+ step(-5);
+ }
+ virtual void setSkinSuffix(const QString&) {
+ }
+
+signals:
+ void volumeChanged(int);
+ void muteChanged(bool);
+};
+
+#endif