view main/SVSplash.cpp @ 1472:59c6b75da437 3.0-integration

Fix race condition in first-time recording, where adding the recording wave model would prompt the audio play source to note that its channel count had increased (from 0 to, say, 2) and thus to cause the audio device to be reopened, stopping recording. Fix is to make this only happen if channel count increases beyond that of the device, which shouldn't happen in the recording case

/* -*- 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->drawText
	(width() - painter->fontMetrics().width(text) - (width()/50),
	 (width()/70) + painter->fontMetrics().ascent(),
	 text);
}