1 files changed, 80 insertions, 0 deletions
diff --git a/plugingui/knob.h b/plugingui/knob.h
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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ *            knob.h
+ *
+ *  Thu Feb 28 07:37:27 CET 2013
+ *  Copyright 2013 Bent Bisballe Nyeng
+ *  deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ *  This file is part of DrumGizmo.
+ *
+ *  DrumGizmo 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.
+ *
+ *  DrumGizmo 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 DrumGizmo; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
+ */
+#pragma once
+
+#include "widget.h"
+
+#include "image.h"
+
+#include "notifier.h"
+
+namespace GUI {
+
+class Knob : public Widget {
+public:
+  Knob(Widget *parent);
+
+  bool catchMouse() override { return true; }
+  bool isFocusable() override { return true; }
+
+  void setValue(float value);
+  float value();
+
+  Notifier<float> valueChangedNotifier; // (float newValue)
+
+protected:
+  virtual void clicked() {}
+
+  // From Widget:
+  virtual void repaintEvent(RepaintEvent *e) override;
+  virtual void buttonEvent(ButtonEvent *e) override;
+  virtual void mouseMoveEvent(MouseMoveEvent *e) override;
+  virtual void scrollEvent(ScrollEvent *e) override;
+  virtual void keyEvent(KeyEvent *e) override;
+
+private:
+  //! Sets the internal value and sends out the changed notification.
+  void internalSetValue(float value);
+
+  typedef enum {
+    up,
+    down
+  } state_t;
+
+  state_t state;
+
+  float currentValue;
+  float maximum;
+  float minimum;
+
+  Image img_knob;
+
+  int mouse_offset_x;
+};
+
+} // GUI::
+