view main/SVSplash.cpp @ 2090:0a93e653e107 spectrogramparam

Use log-frequency rather than log-bin for calculating x coord in spectrum. This has the advantage that frequency positions don't move when we change the window size or oversampling ratio, but it does give us an unhelpfully large amount of space for very low frequencies - to be considered

/* -*- 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 "SVSplash.h"

#include "../version.h"

#include <QPainter>
#include <QApplication>
#include <QDesktopWidget>
#include <QSvgRenderer>

#include <cmath>

#include <iostream>
using namespace std;

SVSplash::SVSplash()
{
    setWindowFlags(windowFlags() | Qt::WindowStaysOnTopHint);
    
    QPixmap *p1 = new QPixmap(":icons/scalable/sv-splash.png");

    int w = p1->width(), h = p1->height();
    QRect desk = QApplication::desktop()->availableGeometry();

    double dpratio = devicePixelRatio();
    double widthMultiple = double(desk.width()) / double(w);

    int sw = w, sh = h;

    if (widthMultiple > 2.5 || dpratio > 1.0) {

        // Hi-dpi either via pixel doubling or simply via lots of
        // pixels

        double factor = widthMultiple / 2.5;
        if (factor < 1.0) factor = 1.0;
        sw = int(floor(w * factor));
        sh = int(floor(h * factor));

        delete p1;
        m_pixmap = new QPixmap(int(floor(sw * dpratio)),
                               int(floor(sh * dpratio)));

//        cerr << "pixmap size = " << m_pixmap->width() << " * "
//             << m_pixmap->height() << endl;
        
        m_pixmap->fill(Qt::red);
        QSvgRenderer renderer(QString(":icons/scalable/sv-splash.svg"));
        QPainter painter(m_pixmap);
        renderer.render(&painter);
        painter.end();

    } else {
        // The "low dpi" case
        m_pixmap = p1;
    }
    
    setFixedWidth(sw);
    setFixedHeight(sh);
    setGeometry(desk.x() + desk.width()/2 - sw/2,
                desk.y() + desk.height()/2 - sh/2,
                sw, sh);
}

SVSplash::~SVSplash()
{
    delete m_pixmap;
}

void
SVSplash::finishSplash(QWidget *w)
{
    finish(w);
}

void
SVSplash::drawContents(QPainter *painter)
{
    painter->drawPixmap(rect(), *m_pixmap, m_pixmap->rect());
    QString text = QString("v%1").arg(SV_VERSION);
    painter->setPen(Qt::black);
    painter->drawText
        (width() - painter->fontMetrics().width(text) - (width()/50),
         (width()/70) + painter->fontMetrics().ascent(),
         text);
}