diff main/SVSplash.cpp @ 954:74b3eaa684d3 scalable-icons

Add splash screen code

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main/SVSplash.cpp	Wed May 06 13:02:28 2015 +0100
@@ -0,0 +1,98 @@
+/* -*- 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 <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()/50) + painter->fontMetrics().ascent(),
+	 text);
+}
+
+