lbajardsilogic@0: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
lbajardsilogic@0: 
lbajardsilogic@0: /*
lbajardsilogic@0:     Sonic Visualiser
lbajardsilogic@0:     An audio file viewer and annotation editor.
lbajardsilogic@0:     Centre for Digital Music, Queen Mary, University of London.
lbajardsilogic@0:     This file copyright 2006 QMUL.
lbajardsilogic@0: 
lbajardsilogic@0:     This program is free software; you can redistribute it and/or
lbajardsilogic@0:     modify it under the terms of the GNU General Public License as
lbajardsilogic@0:     published by the Free Software Foundation; either version 2 of the
lbajardsilogic@0:     License, or (at your option) any later version.  See the file
lbajardsilogic@0:     COPYING included with this distribution for more information.
lbajardsilogic@0: */
lbajardsilogic@0: 
lbajardsilogic@0: #include "Thumbwheel.h"
lbajardsilogic@0: 
lbajardsilogic@0: #include "base/RangeMapper.h"
lbajardsilogic@0: #include "base/Profiler.h"
lbajardsilogic@0: 
lbajardsilogic@0: #include <QMouseEvent>
lbajardsilogic@0: #include <QPaintEvent>
lbajardsilogic@0: #include <QWheelEvent>
lbajardsilogic@0: #include <QInputDialog>
lbajardsilogic@0: #include <QPainter>
lbajardsilogic@0: #include <QPainterPath>
lbajardsilogic@0: 
lbajardsilogic@0: #include <cmath>
lbajardsilogic@0: #include <iostream>
lbajardsilogic@0: 
lbajardsilogic@0: Thumbwheel::Thumbwheel(Qt::Orientation orientation,
lbajardsilogic@0: 		       QWidget *parent) :
lbajardsilogic@0:     QWidget(parent),
lbajardsilogic@0:     m_min(0),
lbajardsilogic@0:     m_max(100),
lbajardsilogic@0:     m_default(50),
lbajardsilogic@0:     m_value(50),
lbajardsilogic@0:     m_mappedValue(50),
lbajardsilogic@0:     m_noMappedUpdate(false),
lbajardsilogic@0:     m_rotation(0.5),
lbajardsilogic@0:     m_orientation(orientation),
lbajardsilogic@0:     m_speed(1.0),
lbajardsilogic@0:     m_tracking(true),
lbajardsilogic@0:     m_showScale(true),
lbajardsilogic@0:     m_clicked(false),
lbajardsilogic@0:     m_atDefault(true),
lbajardsilogic@0:     m_clickRotation(m_rotation),
lbajardsilogic@0:     m_showTooltip(true),
lbajardsilogic@0:     m_rangeMapper(0)
lbajardsilogic@0: {
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: Thumbwheel::~Thumbwheel()
lbajardsilogic@0: {
lbajardsilogic@0:     delete m_rangeMapper;
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: void
lbajardsilogic@0: Thumbwheel::setRangeMapper(RangeMapper *mapper)
lbajardsilogic@0: {
lbajardsilogic@0:     if (m_rangeMapper == mapper) return;
lbajardsilogic@0: 
lbajardsilogic@0:     if (!m_rangeMapper && mapper) {
lbajardsilogic@0:         connect(this, SIGNAL(valueChanged(int)),
lbajardsilogic@0:                 this, SLOT(updateMappedValue(int)));
lbajardsilogic@0:     }
lbajardsilogic@0: 
lbajardsilogic@0:     delete m_rangeMapper;
lbajardsilogic@0:     m_rangeMapper = mapper;
lbajardsilogic@0: 
lbajardsilogic@0:     updateMappedValue(getValue());
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: void
lbajardsilogic@0: Thumbwheel::setShowToolTip(bool show)
lbajardsilogic@0: {
lbajardsilogic@0:     m_showTooltip = show;
lbajardsilogic@0:     m_noMappedUpdate = true;
lbajardsilogic@0:     updateMappedValue(getValue());
lbajardsilogic@0:     m_noMappedUpdate = false;
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: void
lbajardsilogic@0: Thumbwheel::setMinimumValue(int min)
lbajardsilogic@0: {
lbajardsilogic@0:     if (m_min == min) return;
lbajardsilogic@0: 
lbajardsilogic@0:     m_min = min;
lbajardsilogic@0:     if (m_max <= m_min) m_max = m_min + 1;
lbajardsilogic@0:     if (m_value < m_min) m_value = m_min;
lbajardsilogic@0:     if (m_value > m_max) m_value = m_max;
lbajardsilogic@0: 
lbajardsilogic@0:     m_rotation = float(m_value - m_min) / float(m_max - m_min);
lbajardsilogic@0:     update();
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: int
lbajardsilogic@0: Thumbwheel::getMinimumValue() const
lbajardsilogic@0: {
lbajardsilogic@0:     return m_min;
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: void
lbajardsilogic@0: Thumbwheel::setMaximumValue(int max)
lbajardsilogic@0: {
lbajardsilogic@0:     if (m_max == max) return;
lbajardsilogic@0: 
lbajardsilogic@0:     m_max = max;
lbajardsilogic@0:     if (m_min >= m_max) m_min = m_max - 1;
lbajardsilogic@0:     if (m_value < m_min) m_value = m_min;
lbajardsilogic@0:     if (m_value > m_max) m_value = m_max;
lbajardsilogic@0: 
lbajardsilogic@0:     m_rotation = float(m_value - m_min) / float(m_max - m_min);
lbajardsilogic@0:     update();
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: int
lbajardsilogic@0: Thumbwheel::getMaximumValue() const
lbajardsilogic@0: {
lbajardsilogic@0:     return m_max;
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: void
lbajardsilogic@0: Thumbwheel::setDefaultValue(int deft)
lbajardsilogic@0: {
lbajardsilogic@0:     if (m_default == deft) return;
lbajardsilogic@0: 
lbajardsilogic@0:     m_default = deft;
lbajardsilogic@0:     if (m_atDefault) {
lbajardsilogic@0:         setValue(m_default);
lbajardsilogic@0:         m_atDefault = true; // setValue unsets this
lbajardsilogic@0:         emit valueChanged(getValue());
lbajardsilogic@0:     }
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: void
lbajardsilogic@0: Thumbwheel::setMappedValue(float mappedValue)
lbajardsilogic@0: {
lbajardsilogic@0:     if (m_rangeMapper) {
lbajardsilogic@0:         int newValue = m_rangeMapper->getPositionForValue(mappedValue);
lbajardsilogic@0:         bool changed = (m_mappedValue != mappedValue);
lbajardsilogic@0:         m_mappedValue = mappedValue;
lbajardsilogic@0:         m_noMappedUpdate = true;
lbajardsilogic@0: //        std::cerr << "Thumbwheel::setMappedValue(" << mappedValue << "): new value is " << newValue << " (visible " << isVisible() << ")" << std::endl;
lbajardsilogic@0:         if (newValue != getValue()) {
lbajardsilogic@0:             setValue(newValue);
lbajardsilogic@0:             changed = true;
lbajardsilogic@0:         }
lbajardsilogic@0:         if (changed) emit valueChanged(newValue);
lbajardsilogic@0:         m_noMappedUpdate = false;
lbajardsilogic@0:     } else {
lbajardsilogic@0:         int v = int(mappedValue);
lbajardsilogic@0:         if (v != getValue()) {
lbajardsilogic@0:             setValue(v);
lbajardsilogic@0:             emit valueChanged(v);
lbajardsilogic@0:         }
lbajardsilogic@0:     }
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: int
lbajardsilogic@0: Thumbwheel::getDefaultValue() const
lbajardsilogic@0: {
lbajardsilogic@0:     return m_default;
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: void
lbajardsilogic@0: Thumbwheel::setValue(int value)
lbajardsilogic@0: {
lbajardsilogic@0: //    std::cerr << "Thumbwheel::setValue(" << value << ") (from " << m_value
lbajardsilogic@0: //              << ", rotation " << m_rotation << ")" << " (visible " << isVisible() << ")" << std::endl;
lbajardsilogic@0: 
lbajardsilogic@0:     if (m_value != value) {
lbajardsilogic@0: 
lbajardsilogic@0:         m_atDefault = false;
lbajardsilogic@0: 
lbajardsilogic@0:         if (value < m_min) value = m_min;
lbajardsilogic@0:         if (value > m_max) value = m_max;
lbajardsilogic@0:         m_value = value;
lbajardsilogic@0:     }
lbajardsilogic@0: 
lbajardsilogic@0:     m_rotation = float(m_value - m_min) / float(m_max - m_min);
lbajardsilogic@0:     if (isVisible()) update();
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: void
lbajardsilogic@0: Thumbwheel::resetToDefault()
lbajardsilogic@0: {
lbajardsilogic@0:     if (m_default == m_value) return;
lbajardsilogic@0:     setValue(m_default);
lbajardsilogic@0:     m_atDefault = true;
lbajardsilogic@0:     emit valueChanged(getValue());
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: int
lbajardsilogic@0: Thumbwheel::getValue() const
lbajardsilogic@0: {
lbajardsilogic@0:     return m_value;
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: float
lbajardsilogic@0: Thumbwheel::getMappedValue() const
lbajardsilogic@0: {
lbajardsilogic@0:     if (m_rangeMapper) {
lbajardsilogic@0: //        std::cerr << "Thumbwheel::getMappedValue(): value = " << getValue() << ", mappedValue = " << m_mappedValue << std::endl;
lbajardsilogic@0:         return m_mappedValue;
lbajardsilogic@0:     }
lbajardsilogic@0:     return getValue();
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: void
lbajardsilogic@0: Thumbwheel::updateMappedValue(int value)
lbajardsilogic@0: {
lbajardsilogic@0:     if (!m_noMappedUpdate) {
lbajardsilogic@0:         if (m_rangeMapper) {
lbajardsilogic@0:             m_mappedValue = m_rangeMapper->getValueForPosition(value);
lbajardsilogic@0:         } else {
lbajardsilogic@0:             m_mappedValue = value;
lbajardsilogic@0:         }
lbajardsilogic@0:     }
lbajardsilogic@0: 
lbajardsilogic@0:     if (m_showTooltip) {
lbajardsilogic@0:         QString name = objectName();
lbajardsilogic@0:         QString unit = "";
lbajardsilogic@0:         QString text;
lbajardsilogic@0:         if (m_rangeMapper) unit = m_rangeMapper->getUnit();
lbajardsilogic@0:         if (name != "") {
lbajardsilogic@0:             text = tr("%1: %2%3").arg(name).arg(m_mappedValue).arg(unit);
lbajardsilogic@0:         } else {
lbajardsilogic@0:             text = tr("%2%3").arg(m_mappedValue).arg(unit);
lbajardsilogic@0:         }
lbajardsilogic@0:         setToolTip(text);
lbajardsilogic@0:     }
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: void
lbajardsilogic@0: Thumbwheel::setSpeed(float speed)
lbajardsilogic@0: {
lbajardsilogic@0:     m_speed = speed;
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: float
lbajardsilogic@0: Thumbwheel::getSpeed() const
lbajardsilogic@0: {
lbajardsilogic@0:     return m_speed;
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: void
lbajardsilogic@0: Thumbwheel::setTracking(bool tracking)
lbajardsilogic@0: {
lbajardsilogic@0:     m_tracking = tracking;
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: bool
lbajardsilogic@0: Thumbwheel::getTracking() const
lbajardsilogic@0: {
lbajardsilogic@0:     return m_tracking;
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: void
lbajardsilogic@0: Thumbwheel::setShowScale(bool showScale)
lbajardsilogic@0: {
lbajardsilogic@0:     m_showScale = showScale;
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: bool
lbajardsilogic@0: Thumbwheel::getShowScale() const
lbajardsilogic@0: {
lbajardsilogic@0:     return m_showScale;
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: void
lbajardsilogic@0: Thumbwheel::enterEvent(QEvent *)
lbajardsilogic@0: {
lbajardsilogic@0:     emit mouseEntered();
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: void
lbajardsilogic@0: Thumbwheel::leaveEvent(QEvent *)
lbajardsilogic@0: {
lbajardsilogic@0:     emit mouseLeft();
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: void
lbajardsilogic@0: Thumbwheel::mousePressEvent(QMouseEvent *e)
lbajardsilogic@0: {
lbajardsilogic@0:     if (e->button() == Qt::MidButton ||
lbajardsilogic@0:         ((e->button() == Qt::LeftButton) &&
lbajardsilogic@0:          (e->modifiers() & Qt::ControlModifier))) {
lbajardsilogic@0:         resetToDefault();
lbajardsilogic@0:     } else if (e->button() == Qt::LeftButton) {
lbajardsilogic@0:         m_clicked = true;
lbajardsilogic@0:         m_clickPos = e->pos();
lbajardsilogic@0:         m_clickRotation = m_rotation;
lbajardsilogic@0:     }
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: void
lbajardsilogic@0: Thumbwheel::mouseDoubleClickEvent(QMouseEvent *mouseEvent)
lbajardsilogic@0: {
lbajardsilogic@0:     //!!! needs a common base class with AudioDial (and Panner?)
lbajardsilogic@0: 
lbajardsilogic@0:     if (mouseEvent->button() != Qt::LeftButton) {
lbajardsilogic@0:         return;
lbajardsilogic@0:     }
lbajardsilogic@0: 
lbajardsilogic@0:     bool ok = false;
lbajardsilogic@0: 
lbajardsilogic@0:     if (m_rangeMapper) {
lbajardsilogic@0:         
lbajardsilogic@0:         float min = m_rangeMapper->getValueForPosition(m_min);
lbajardsilogic@0:         float max = m_rangeMapper->getValueForPosition(m_max);
lbajardsilogic@0:                 
lbajardsilogic@0:         if (min > max) { 
lbajardsilogic@0:             float tmp = min;
lbajardsilogic@0:             min = max;
lbajardsilogic@0:             max = tmp;
lbajardsilogic@0:         }
lbajardsilogic@0: 
lbajardsilogic@0:         QString unit = m_rangeMapper->getUnit();
lbajardsilogic@0:         
lbajardsilogic@0:         QString text;
lbajardsilogic@0:         if (objectName() != "") {
lbajardsilogic@0:             if (unit != "") {
lbajardsilogic@0:                 text = tr("New value for %1, from %2 to %3 %4:")
lbajardsilogic@0:                     .arg(objectName()).arg(min).arg(max).arg(unit);
lbajardsilogic@0:             } else {
lbajardsilogic@0:                 text = tr("New value for %1, from %2 to %3:")
lbajardsilogic@0:                     .arg(objectName()).arg(min).arg(max);
lbajardsilogic@0:             }
lbajardsilogic@0:         } else {
lbajardsilogic@0:             if (unit != "") {
lbajardsilogic@0:                 text = tr("Enter a new value from %1 to %2 %3:")
lbajardsilogic@0:                     .arg(min).arg(max).arg(unit);
lbajardsilogic@0:             } else {
lbajardsilogic@0:                 text = tr("Enter a new value from %1 to %2:")
lbajardsilogic@0:                     .arg(min).arg(max);
lbajardsilogic@0:             }
lbajardsilogic@0:         }
lbajardsilogic@0:         
lbajardsilogic@0:         float newValue = QInputDialog::getDouble
lbajardsilogic@0:             (this,
lbajardsilogic@0:              tr("Enter new value"),
lbajardsilogic@0:              text,
lbajardsilogic@0:              m_mappedValue,
lbajardsilogic@0:              min,
lbajardsilogic@0:              max,
lbajardsilogic@0:              4, 
lbajardsilogic@0:              &ok);
lbajardsilogic@0:         
lbajardsilogic@0:         if (ok) {
lbajardsilogic@0:             setMappedValue(newValue);
lbajardsilogic@0:         }
lbajardsilogic@0:         
lbajardsilogic@0:     } else {
lbajardsilogic@0:         
lbajardsilogic@0:         int newValue = QInputDialog::getInteger
lbajardsilogic@0:             (this,
lbajardsilogic@0:              tr("Enter new value"),
lbajardsilogic@0:              tr("Enter a new value from %1 to %2:")
lbajardsilogic@0:              .arg(m_min).arg(m_max),
lbajardsilogic@0:              getValue(), m_min, m_max, 1, &ok);
lbajardsilogic@0:         
lbajardsilogic@0:         if (ok) {
lbajardsilogic@0:             setValue(newValue);
lbajardsilogic@0:         }
lbajardsilogic@0:     }
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: 
lbajardsilogic@0: void
lbajardsilogic@0: Thumbwheel::mouseMoveEvent(QMouseEvent *e)
lbajardsilogic@0: {
lbajardsilogic@0:     if (!m_clicked) return;
lbajardsilogic@0:     int dist = 0;
lbajardsilogic@0:     if (m_orientation == Qt::Horizontal) {
lbajardsilogic@0:         dist = e->x() - m_clickPos.x();
lbajardsilogic@0:     } else {
lbajardsilogic@0:         dist = e->y() - m_clickPos.y();
lbajardsilogic@0:     }
lbajardsilogic@0: 
lbajardsilogic@0:     float rotation = m_clickRotation + (m_speed * dist) / 100;
lbajardsilogic@0:     if (rotation < 0.f) rotation = 0.f;
lbajardsilogic@0:     if (rotation > 1.f) rotation = 1.f;
lbajardsilogic@0:     int value = lrintf(m_min + (m_max - m_min) * m_rotation);
lbajardsilogic@0:     if (value != m_value) {
lbajardsilogic@0:         setValue(value);
lbajardsilogic@0:         if (m_tracking) emit valueChanged(getValue());
lbajardsilogic@0:         m_rotation = rotation;
lbajardsilogic@0:     } else if (fabsf(rotation - m_rotation) > 0.001) {
lbajardsilogic@0:         m_rotation = rotation;
lbajardsilogic@0:         repaint();
lbajardsilogic@0:     }
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: void
lbajardsilogic@0: Thumbwheel::mouseReleaseEvent(QMouseEvent *e)
lbajardsilogic@0: {
lbajardsilogic@0:     if (!m_clicked) return;
lbajardsilogic@0:     bool reallyTracking = m_tracking;
lbajardsilogic@0:     m_tracking = true;
lbajardsilogic@0:     mouseMoveEvent(e);
lbajardsilogic@0:     m_tracking = reallyTracking;
lbajardsilogic@0:     m_clicked = false;
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: void
lbajardsilogic@0: Thumbwheel::wheelEvent(QWheelEvent *e)
lbajardsilogic@0: {
lbajardsilogic@0:     int step = lrintf(m_speed);
lbajardsilogic@0:     if (step == 0) step = 1;
lbajardsilogic@0: 
lbajardsilogic@0:     if (e->delta() > 0) {
lbajardsilogic@0: 	setValue(m_value + step);
lbajardsilogic@0:     } else {
lbajardsilogic@0: 	setValue(m_value - step);
lbajardsilogic@0:     }
lbajardsilogic@0:     
lbajardsilogic@0:     emit valueChanged(getValue());
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: void
lbajardsilogic@0: Thumbwheel::paintEvent(QPaintEvent *)
lbajardsilogic@0: {
lbajardsilogic@0:     Profiler profiler("Thumbwheel::paintEvent", true);
lbajardsilogic@0: 
lbajardsilogic@0:     int bw = 3;
lbajardsilogic@0: 
lbajardsilogic@0:     QRect subclip;
lbajardsilogic@0:     if (m_orientation == Qt::Horizontal) {
lbajardsilogic@0:         subclip = QRect(bw, bw+1, width() - bw*2, height() - bw*2 - 2);
lbajardsilogic@0:     } else {
lbajardsilogic@0:         subclip = QRect(bw+1, bw, width() - bw*2 - 2, height() - bw*2);
lbajardsilogic@0:     }
lbajardsilogic@0: 
lbajardsilogic@0:     QPainter paint(this);
lbajardsilogic@0:     paint.fillRect(subclip, palette().background().color());
lbajardsilogic@0: 
lbajardsilogic@0:     paint.setRenderHint(QPainter::Antialiasing, true);
lbajardsilogic@0: 
lbajardsilogic@0:     float w  = width();
lbajardsilogic@0:     float w0 = 0.5;
lbajardsilogic@0:     float w1 = w - 0.5;
lbajardsilogic@0: 
lbajardsilogic@0:     float h  = height();
lbajardsilogic@0:     float h0 = 0.5;
lbajardsilogic@0:     float h1 = h - 0.5;
lbajardsilogic@0: 
lbajardsilogic@0:     for (int i = bw-1; i >= 0; --i) {
lbajardsilogic@0: //    for (int i = 0; i < 1; ++i) {
lbajardsilogic@0: 
lbajardsilogic@0:         int grey = (i + 1) * (256 / (bw + 1));
lbajardsilogic@0:         QColor fc = QColor(grey, grey, grey);
lbajardsilogic@0:         paint.setPen(fc);
lbajardsilogic@0: 
lbajardsilogic@0:         QPainterPath path;
lbajardsilogic@0: 
lbajardsilogic@0:         if (m_orientation == Qt::Horizontal) {
lbajardsilogic@0:             path.moveTo(w0 + i, h0 + i + 2);
lbajardsilogic@0:             path.quadTo(w/2, i * 1.25, w1 - i, h0 + i + 2);
lbajardsilogic@0:             path.lineTo(w1 - i, h1 - i - 2);
lbajardsilogic@0:             path.quadTo(w/2, h - i * 1.25, w0 + i, h1 - i - 2);
lbajardsilogic@0:             path.closeSubpath();
lbajardsilogic@0:         } else {
lbajardsilogic@0:             path.moveTo(w0 + i + 2, h0 + i);
lbajardsilogic@0:             path.quadTo(i * 1.25, h/2, w0 + i + 2, h1 - i);
lbajardsilogic@0:             path.lineTo(w1 - i - 2, h1 - i);
lbajardsilogic@0:             path.quadTo(w - i * 1.25, h/2, w1 - i - 2, h0 + i);
lbajardsilogic@0:             path.closeSubpath();
lbajardsilogic@0:         }
lbajardsilogic@0: 
lbajardsilogic@0:         paint.drawPath(path);
lbajardsilogic@0:     }
lbajardsilogic@0: 
lbajardsilogic@0:     paint.setClipRect(subclip);
lbajardsilogic@0: 
lbajardsilogic@0:     float radians = m_rotation * 1.5f * M_PI;
lbajardsilogic@0: 
lbajardsilogic@0: //    std::cerr << "value = " << m_value << ", min = " << m_min << ", max = " << m_max << ", rotation = " << rotation << std::endl;
lbajardsilogic@0: 
lbajardsilogic@0:     w = (m_orientation == Qt::Horizontal ? width() : height()) - bw*2;
lbajardsilogic@0: 
lbajardsilogic@0:     // total number of notches on the entire wheel
lbajardsilogic@0:     int notches = 25;
lbajardsilogic@0:     
lbajardsilogic@0:     // radius of the wheel including invisible part
lbajardsilogic@0:     int radius = int(w / 2 + 2);
lbajardsilogic@0: 
lbajardsilogic@0:     for (int i = 0; i < notches; ++i) {
lbajardsilogic@0: 
lbajardsilogic@0:         float a0 = (2.f * M_PI * i) / notches + radians;
lbajardsilogic@0:         float a1 = a0 + M_PI / (notches * 2);
lbajardsilogic@0:         float a2 = (2.f * M_PI * (i + 1)) / notches + radians;
lbajardsilogic@0: 
lbajardsilogic@0:         float depth = cosf((a0 + a2) / 2);
lbajardsilogic@0:         if (depth < 0) continue;
lbajardsilogic@0: 
lbajardsilogic@0:         float x0 = radius * sinf(a0) + w/2;
lbajardsilogic@0:         float x1 = radius * sinf(a1) + w/2;
lbajardsilogic@0:         float x2 = radius * sinf(a2) + w/2;
lbajardsilogic@0:         if (x2 < 0 || x0 > w) continue;
lbajardsilogic@0: 
lbajardsilogic@0:         if (x0 < 0) x0 = 0;
lbajardsilogic@0:         if (x2 > w) x2 = w;
lbajardsilogic@0: 
lbajardsilogic@0:         x0 += bw;
lbajardsilogic@0:         x1 += bw;
lbajardsilogic@0:         x2 += bw;
lbajardsilogic@0: 
lbajardsilogic@0:         int grey = lrintf(255 * depth);
lbajardsilogic@0:         QColor fc = QColor(grey, grey, grey);
lbajardsilogic@0:         QColor oc = palette().dark().color();
lbajardsilogic@0: 
lbajardsilogic@0:         paint.setPen(oc);
lbajardsilogic@0:         paint.setBrush(fc);
lbajardsilogic@0: 
lbajardsilogic@0:         if (m_orientation == Qt::Horizontal) {
lbajardsilogic@0:             paint.drawRect(QRectF(x1, bw, x2 - x1, height() - bw*2));
lbajardsilogic@0:         } else {
lbajardsilogic@0:             paint.drawRect(QRectF(bw, x1, width() - bw*2, x2 - x1));
lbajardsilogic@0:         }
lbajardsilogic@0: 
lbajardsilogic@0:         if (m_showScale) {
lbajardsilogic@0: 
lbajardsilogic@0:             paint.setBrush(oc);
lbajardsilogic@0: 
lbajardsilogic@0:             float prop;
lbajardsilogic@0:             if (i >= notches / 4) {
lbajardsilogic@0:                 prop = float(notches - (((i - float(notches) / 4.f) * 4.f) / 3.f))
lbajardsilogic@0:                     / notches;
lbajardsilogic@0:             } else {
lbajardsilogic@0:                 prop = 0.f;
lbajardsilogic@0:             }
lbajardsilogic@0:             
lbajardsilogic@0:             if (m_orientation == Qt::Horizontal) {
lbajardsilogic@0:                 paint.drawRect(QRectF(x1, height() - (height() - bw*2) * prop - bw,
lbajardsilogic@0:                                       x2 - x1, height() * prop));
lbajardsilogic@0:             } else {
lbajardsilogic@0:                 paint.drawRect(QRectF(bw, x1, (width() - bw*2) * prop, x2 - x1));
lbajardsilogic@0:             }
lbajardsilogic@0:         }
lbajardsilogic@0: 
lbajardsilogic@0:         paint.setPen(oc);
lbajardsilogic@0:         paint.setBrush(palette().background().color());
lbajardsilogic@0: 
lbajardsilogic@0:         if (m_orientation == Qt::Horizontal) {
lbajardsilogic@0:             paint.drawRect(QRectF(x0, bw, x1 - x0, height() - bw*2));
lbajardsilogic@0:         } else {
lbajardsilogic@0:             paint.drawRect(QRectF(bw, x0, width() - bw*2, x1 - x0));
lbajardsilogic@0:         }
lbajardsilogic@0:     }
lbajardsilogic@0: }
lbajardsilogic@0: 
lbajardsilogic@0: QSize
lbajardsilogic@0: Thumbwheel::sizeHint() const
lbajardsilogic@0: {
lbajardsilogic@0:     if (m_orientation == Qt::Horizontal) {
lbajardsilogic@0:         return QSize(80, 12);
lbajardsilogic@0:     } else {
lbajardsilogic@0:         return QSize(12, 80);
lbajardsilogic@0:     }
lbajardsilogic@0: }
lbajardsilogic@0: