1 files changed, 88 insertions, 0 deletions
diff --git a/dggui/knob.h b/dggui/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 Lesser General Public License as published by
+ *  the Free Software Foundation; either version 3 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 Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser 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 <notifier.h>
+
+#include "widget.h"
+#include "texture.h"
+#include "font.h"
+
+namespace GUI {
+
+class Knob : public Widget {
+public:
+	Knob(Widget *parent);
+	virtual ~Knob() = default;
+
+	// From Widget:
+	bool catchMouse() override { return true; }
+	bool isFocusable() override { return true; }
+
+	void setValue(float value);
+	void setDefaultValue(float value);
+	void setRange(float minimum, float maximum);
+	float value();
+	void showValue(bool show_value);
+
+	Notifier<float> valueChangedNotifier; // (float newValue)
+
+protected:
+	virtual void clicked() {}
+
+	// From Widget:
+	virtual void repaintEvent(RepaintEvent* repaintEvent) override;
+	virtual void buttonEvent(ButtonEvent* buttonEvent) override;
+	virtual void mouseMoveEvent(MouseMoveEvent* mouseMoveEvent) override;
+	virtual void scrollEvent(ScrollEvent* scrollEvent) override;
+	virtual void keyEvent(KeyEvent* keyEvent) 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 current_value;
+	float default_value = 0.0;
+	float maximum;
+	float minimum;
+
+	bool show_value{true};
+
+	Texture img_knob;
+
+	int mouse_offset_x;
+	Font font;
+};
+
+} // GUI::