view widgets/SelectableLabel.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 file copyright 2008 QMUL.
    
    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 "SelectableLabel.h"

#include <iostream>
#include <QApplication>

SelectableLabel::SelectableLabel(QWidget *p) :
    QLabel(p),
    m_selected(false)
{
    setTextFormat(Qt::RichText);
//    setLineWidth(2);
//    setFixedWidth(480);
    setupStyle();
    setOpenExternalLinks(true);
}

SelectableLabel::~SelectableLabel()
{
}

void
SelectableLabel::setUnselectedText(QString text)
{
    if (m_unselectedText == text) return;
    m_unselectedText = text;
    if (!m_selected) {
        setText(m_unselectedText);
        resize(sizeHint());
    }
}

void
SelectableLabel::setSelectedText(QString text)
{
    if (m_selectedText == text) return;
    m_selectedText = text;
    if (m_selected) {
        setText(m_selectedText);
        resize(sizeHint());
    }
}

void
SelectableLabel::setupStyle()
{
    QPalette palette = QApplication::palette();

    setTextInteractionFlags(Qt::LinksAccessibleByKeyboard |
                            Qt::LinksAccessibleByMouse |
                            Qt::TextSelectableByMouse);

    if (m_selected) {
        setWordWrap(true);
        setStyleSheet
            (QString("QLabel:hover { background: %1; color: %3; } "
                     "QLabel:!hover { background: %2; color: %3 } "
                     "QLabel { padding: 7px }")
             .arg(palette.mid().color().lighter(120).name())
             .arg(palette.mid().color().lighter(140).name())
             .arg(palette.text().color().name()));
    } else {
        setWordWrap(false);
        setStyleSheet
            (QString("QLabel:hover { background: %1; color: %3; } "
                     "QLabel:!hover { background: %2; color: %3 } "
                     "QLabel { padding: 7px }")
             .arg(palette.button().color().name())
             .arg(palette.light().color().name())
             .arg(palette.text().color().name()));
    }
}    

void
SelectableLabel::setSelected(bool s)
{
    if (m_selected == s) return;
    m_selected = s;
    if (m_selected) {
        setText(m_selectedText);
    } else {
        setText(m_unselectedText);
    }
    setupStyle();
    parentWidget()->resize(parentWidget()->sizeHint());
}

void
SelectableLabel::toggle()
{
    setSelected(!m_selected);
}

void
SelectableLabel::mousePressEvent(QMouseEvent *e)
{
    m_swallowRelease = !m_selected;
    setSelected(true);
    QLabel::mousePressEvent(e);
    emit selectionChanged();
}

void
SelectableLabel::mouseDoubleClickEvent(QMouseEvent *e)
{
    QLabel::mouseDoubleClickEvent(e);
    emit doubleClicked();
}

void
SelectableLabel::mouseReleaseEvent(QMouseEvent *e)
{
    if (!m_swallowRelease) QLabel::mouseReleaseEvent(e);
    m_swallowRelease = false;
}

void
SelectableLabel::enterEvent(QEvent *)
{
//    cerr << "enterEvent" << endl;
//    QPalette palette = QApplication::palette();
//    palette.setColor(QPalette::Window, Qt::gray);
//    setStyleSheet("background: gray");
//    setPalette(palette);
}

void
SelectableLabel::leaveEvent(QEvent *)
{
//    cerr << "leaveEvent" << endl;
//    setStyleSheet("background: white");
//    QPalette palette = QApplication::palette();
//    palette.setColor(QPalette::Window, Qt::gray);
//    setPalette(palette);
}