view widgets/LevelPanToolButton.cpp @ 1534:bfd8b22fd67c

Fix #1904 Scrolling colour 3d plot does not always work when in View normalisation mode. We shouldn't imagine we've just invalidated the cache if the truth is that we've only just created the renderer

/* -*- 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();
}