view widgets/LevelPanToolButton.cpp @ 1551:e79731086b0f

Fixes to NoteLayer, particularly to calculation of vertical scale when model unit is not Hz. To avoid inconsistency we now behave as if the unit is always Hz from the point of view of the external API and display, converting at the point where we obtain values from the events themselves. Also various fixes to editing.

/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */

/*
    Sonic Visualiser
    An audio file viewer and annotation editor.
    Centre for Digital Music, Queen Mary, University of London.
    
    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.  See the file
    COPYING included with this distribution for more information.
*/

#include "LevelPanToolButton.h"
#include "LevelPanWidget.h"

#include <QMenu>
#include <QWidgetAction>
#include <QImage>
#include <QMouseEvent>
#include <QStylePainter>
#include <QStyleOptionToolButton>

#include "base/Debug.h"

#include <iostream>
using std::cerr;
using std::endl;

LevelPanToolButton::LevelPanToolButton(QWidget *parent) :
    QToolButton(parent),
    m_pixels(32),
    m_pixelsBig(32 * 3),
    m_muted(false),
    m_savedLevel(1.f)
{
    m_lpw = new LevelPanWidget();

    connect(m_lpw, SIGNAL(levelChanged(float)), this, SIGNAL(levelChanged(float)));
    connect(m_lpw, SIGNAL(levelChanged(float)), this, SLOT(selfLevelChanged(float)));

    connect(m_lpw, SIGNAL(panChanged(float)), this, SIGNAL(panChanged(float)));
    connect(m_lpw, SIGNAL(panChanged(float)), this, SLOT(update()));

    connect(this, SIGNAL(clicked(bool)), this, SLOT(selfClicked()));
    
    QMenu *menu = new QMenu();
    QWidgetAction *wa = new QWidgetAction(menu);
    wa->setDefaultWidget(m_lpw);
    menu->addAction(wa);

    setPopupMode(InstantPopup);
    setMenu(menu);
    setToolTip(tr("Click to adjust level and pan"));

    setImageSize(m_pixels);
    setBigImageSize(m_pixelsBig);
}

LevelPanToolButton::~LevelPanToolButton()
{
}

void
LevelPanToolButton::mousePressEvent(QMouseEvent *e)
{
    if (e->button() == Qt::MidButton ||
        ((e->button() == Qt::LeftButton) &&
         (e->modifiers() & Qt::ControlModifier))) {
        m_lpw->setToDefault();
        e->accept();
    } else {
        QToolButton::mousePressEvent(e);
    }
}

void
LevelPanToolButton::wheelEvent(QWheelEvent *e)
{
    m_lpw->wheelEvent(e);
}

float
LevelPanToolButton::getLevel() const
{
    return m_lpw->getLevel();
}

float
LevelPanToolButton::getPan() const
{
    return m_lpw->getPan();
}

bool
LevelPanToolButton::includesMute() const
{
    return m_lpw->includesMute();
}

void
LevelPanToolButton::setImageSize(int pixels)
{
    m_pixels = pixels;

    QPixmap px(m_pixels, m_pixels);
    px.fill(Qt::transparent);
    setIcon(px);
}

void
LevelPanToolButton::setBigImageSize(int pixels)
{
    m_pixelsBig = pixels;

    m_lpw->setFixedWidth(m_pixelsBig);
    m_lpw->setFixedHeight(m_pixelsBig);
}

void
LevelPanToolButton::setLevel(float level)
{
    m_lpw->setLevel(level);
    update();
}

void
LevelPanToolButton::setPan(float pan)
{
    m_lpw->setPan(pan);
    update();
}

void
LevelPanToolButton::setMonitoringLevels(float left, float right)
{
    m_lpw->setMonitoringLevels(left, right);
    update();
}

void
LevelPanToolButton::setIncludeMute(bool include)
{
    m_lpw->setIncludeMute(include);
    update();
}

void
LevelPanToolButton::setEnabled(bool enabled)
{
    m_lpw->setEnabled(enabled);
    QToolButton::setEnabled(enabled);
}

void
LevelPanToolButton::selfLevelChanged(float level)
{
    if (level > 0.f) {
        m_muted = false;
    } else {
        m_muted = true;
        m_savedLevel = 1.f;
    }
    update();
}

void
LevelPanToolButton::selfClicked()
{
    if (m_muted) {
        m_muted = false;
        m_lpw->setLevel(m_savedLevel);
        emit levelChanged(m_savedLevel);
    } else {
        m_savedLevel = m_lpw->getLevel();
        m_muted = true;
        m_lpw->setLevel(0.f);
        emit levelChanged(0.f);
    }
    update();
}

void
LevelPanToolButton::paintEvent(QPaintEvent *)
{
    QStylePainter p(this);
    QStyleOptionToolButton opt;
    initStyleOption(&opt);
    opt.features &= (~QStyleOptionToolButton::HasMenu);
    p.drawComplexControl(QStyle::CC_ToolButton, opt);
    
    if (m_pixels >= height()) {
        setImageSize(height()-1);
    }
    
    double margin = (double(height()) - m_pixels) / 2.0;
    m_lpw->renderTo(this, QRectF(margin, margin, m_pixels, m_pixels), false);
}

void
LevelPanToolButton::enterEvent(QEvent *e)
{
    QToolButton::enterEvent(e);
    emit mouseEntered();
}

void
LevelPanToolButton::leaveEvent(QEvent *e)
{
    QToolButton::enterEvent(e);
    emit mouseLeft();
}