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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() { return true; }
bool isFocusable() { 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::
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