comparison widgets/Fader.h @ 0:2a4f26e85b4c

initial import

+/* -*- c-basic-offset: 4 -*-  vi:set ts=8 sts=4 sw=4: */
+
+/*
+    A waveform viewer and audio annotation editor.
+    Chris Cannam, Queen Mary University of London, 2005
+    
+    This is experimental software.  Not for distribution.
+*/
+
+#ifndef FADER_H
+#define FADER_H
+
+/**
+ * Horizontal audio fader and meter widget.
+ * Based on the vertical fader and meter widget from:
+ * 
+ * Hydrogen
+ * Copyright(c) 2002-2005 by Alex >Comix< Cominu [[e-mail]]
+ *
+ * http://www.hydrogen-music.org
+ *
+ * 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
+ *
+ * $Id: Fader.h,v 1.14 2005/08/10 08:03:30 comix Exp $
+ */
+
+
+#include <string>
+#include <iostream>
+
+#include <QWidget>
+#include <QPixmap>
+#include <QMouseEvent>
+#include <QWheelEvent>
+#include <QPaintEvent>
+
+class Fader : public QWidget
+{
+    Q_OBJECT
+
+public:
+    Fader(QWidget *parent, bool withoutKnob = false);
+    ~Fader();
+
+    void setValue(float newValue);
+    float getValue();
+
+    void setPeakLeft(float);
+    float getPeakLeft() { return m_peakLeft; }
+
+    void setPeakRight(float);
+    float getPeakRight() { return m_peakRight; }
+
+    virtual void mousePressEvent(QMouseEvent *ev);
+    virtual void mouseDoubleClickEvent(QMouseEvent *ev);
+    virtual void mouseMoveEvent(QMouseEvent *ev);
+    virtual void wheelEvent( QWheelEvent *ev );
+    virtual void paintEvent(QPaintEvent *ev);
+
+signals:
+    void valueChanged(float); // 0.0 -> 1.0
+
+private:
+    bool m_withoutKnob;
+    float m_value;
+    float m_peakLeft;
+    float m_peakRight;
+
+    QPixmap m_back;
+    QPixmap m_leds;
+    QPixmap m_knob;
+    QPixmap m_clip;
+};
+
+#endif