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Qt: HiDPI (retina) support for splash screen

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- remove splash screen images (reduce binary size)
- dynamicly draw splash screen with available icon.
- remove testnet icon
- dynamicly colorize testnet icon
This commit is contained in:
Jonas Schnelli
2014-11-06 16:28:29 +01:00
committed by Wladimir J. van der Laan
parent f3af0c898f
commit 54f2571a00
12 changed files with 122 additions and 36 deletions
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41
src/qt/splashscreen.cpp
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@@ -19,6 +19,7 @@
#include <QCloseEvent>
#include <QDesktopWidget>
#include <QPainter>
#include <QRadialGradient>
SplashScreen::SplashScreen(Qt::WindowFlags f, const NetworkStyle *networkStyle) :
QWidget(0, f), curAlignment(0)
@@ -30,6 +31,10 @@ SplashScreen::SplashScreen(Qt::WindowFlags f, const NetworkStyle *networkStyle)
int titleCopyrightVSpace = 40;
float fontFactor = 1.0;
float devicePixelRatio = 1.0;
#if QT_VERSION > 0x050100
devicePixelRatio = ((QGuiApplication*)QCoreApplication::instance())->devicePixelRatio();
#endif
// define text to place
QString titleText = tr("Bitcoin Core");
@@ -39,12 +44,34 @@ SplashScreen::SplashScreen(Qt::WindowFlags f, const NetworkStyle *networkStyle)
QString font = "Arial";
// load the bitmap for writing some text over it
pixmap = networkStyle->getSplashImage();
// create a bitmap according to device pixelratio
QSize splashSize(480*devicePixelRatio,320*devicePixelRatio);
pixmap = QPixmap(splashSize);
#if QT_VERSION > 0x050100
// change to HiDPI if it makes sense
pixmap.setDevicePixelRatio(devicePixelRatio);
#endif
QPainter pixPaint(&pixmap);
pixPaint.setPen(QColor(100,100,100));
// draw a slighly radial gradient
QRadialGradient gradient(QPoint(0,0), splashSize.width()/devicePixelRatio);
gradient.setColorAt(0, Qt::white);
gradient.setColorAt(1, QColor(247,247,247));
QRect rGradient(QPoint(0,0), splashSize);
pixPaint.fillRect(rGradient, gradient);
// draw the bitcoin icon, expected size of PNG: 1024x1024
QRect rectIcon(QPoint(-150,-122), QSize(430,430));
const QSize requiredSize(1024,1024);
QIcon appIcon = networkStyle->getAppIcon(requiredSize);
QPixmap icon(appIcon.pixmap(requiredSize));
pixPaint.drawPixmap(rectIcon, icon);
// check font size and drawing with
pixPaint.setFont(QFont(font, 33*fontFactor));
QFontMetrics fm = pixPaint.fontMetrics();
@@ -57,7 +84,7 @@ SplashScreen::SplashScreen(Qt::WindowFlags f, const NetworkStyle *networkStyle)
pixPaint.setFont(QFont(font, 33*fontFactor));
fm = pixPaint.fontMetrics();
titleTextWidth = fm.width(titleText);
pixPaint.drawText(pixmap.width()-titleTextWidth-paddingRight,paddingTop,titleText);
pixPaint.drawText(pixmap.width()/devicePixelRatio-titleTextWidth-paddingRight,paddingTop,titleText);
pixPaint.setFont(QFont(font, 15*fontFactor));
@@ -68,11 +95,11 @@ SplashScreen::SplashScreen(Qt::WindowFlags f, const NetworkStyle *networkStyle)
pixPaint.setFont(QFont(font, 10*fontFactor));
titleVersionVSpace -= 5;
}
pixPaint.drawText(pixmap.width()-titleTextWidth-paddingRight+2,paddingTop+titleVersionVSpace,versionText);
pixPaint.drawText(pixmap.width()/devicePixelRatio-titleTextWidth-paddingRight+2,paddingTop+titleVersionVSpace,versionText);
// draw copyright stuff
pixPaint.setFont(QFont(font, 10*fontFactor));
pixPaint.drawText(pixmap.width()-titleTextWidth-paddingRight,paddingTop+titleCopyrightVSpace,copyrightText);
pixPaint.drawText(pixmap.width()/devicePixelRatio-titleTextWidth-paddingRight,paddingTop+titleCopyrightVSpace,copyrightText);
// draw additional text if special network
if(!titleAddText.isEmpty()) {
@@ -81,7 +108,7 @@ SplashScreen::SplashScreen(Qt::WindowFlags f, const NetworkStyle *networkStyle)
pixPaint.setFont(boldFont);
fm = pixPaint.fontMetrics();
int titleAddTextWidth = fm.width(titleAddText);
pixPaint.drawText(pixmap.width()-titleAddTextWidth-10,15,titleAddText);
pixPaint.drawText(pixmap.width()/devicePixelRatio-titleAddTextWidth-10,15,titleAddText);
}
pixPaint.end();
@@ -90,7 +117,7 @@ SplashScreen::SplashScreen(Qt::WindowFlags f, const NetworkStyle *networkStyle)
setWindowTitle(titleText + " " + titleAddText);
// Resize window and move to center of desktop, disallow resizing
QRect r(QPoint(), pixmap.size());
QRect r(QPoint(), QSize(pixmap.size().width()/devicePixelRatio,pixmap.size().height()/devicePixelRatio));
resize(r.size());
setFixedSize(r.size());
move(QApplication::desktop()->screenGeometry().center() - r.center());