qt5base-lts/examples/opengl/paintedwindow/paintedwindow.cpp
Samuel Rødal c66b7cf55b Added Orientation API to QScreen and QWindow.
QScreen now has a primary and current orientation, and a QWindow can set
its orientation as well. The current screen orientation is just a hint
to the application.

Change-Id: I4635982cfac2d16634d4edd5c6ab78e9d0ac55a4
Reviewed-on: http://codereview.qt-project.org/5988
Reviewed-by: Paul Olav Tvete <paul.tvete@nokia.com>
Sanity-Review: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Lars Knoll <lars.knoll@nokia.com>
2011-10-07 22:23:30 +02:00

133 lines
4.3 KiB
C++

/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** You may use this file under the terms of the BSD license as follows:
**
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#include "paintedwindow.h"
#include <QGuiApplication>
#include <QOpenGLContext>
#include <QOpenGLPaintDevice>
#include <QPainter>
#include <QScreen>
#include <QTimer>
#include <qmath.h>
PaintedWindow::PaintedWindow()
{
QSurfaceFormat format;
format.setStencilBufferSize(8);
format.setSamples(4);
setSurfaceType(QWindow::OpenGLSurface);
setWindowFlags(Qt::Window | Qt::WindowTitleHint | Qt::WindowMinMaxButtonsHint | Qt::WindowCloseButtonHint);
setFormat(format);
create();
m_context = new QOpenGLContext(this);
m_context->setFormat(format);
m_context->create();
}
void PaintedWindow::resizeEvent(QResizeEvent *)
{
paint();
}
void PaintedWindow::exposeEvent(QExposeEvent *)
{
paint();
}
void PaintedWindow::mousePressEvent(QMouseEvent *)
{
Qt::ScreenOrientation o = orientation();
if (o == Qt::UnknownOrientation)
o = QGuiApplication::primaryScreen()->primaryOrientation();
switch (o) {
case Qt::LandscapeOrientation:
setOrientation(Qt::PortraitOrientation);
break;
case Qt::PortraitOrientation:
setOrientation(Qt::InvertedLandscapeOrientation);
break;
case Qt::InvertedLandscapeOrientation:
setOrientation(Qt::InvertedPortraitOrientation);
break;
case Qt::InvertedPortraitOrientation:
setOrientation(Qt::LandscapeOrientation);
break;
default:
Q_ASSERT(false);
}
paint();
}
void PaintedWindow::paint()
{
m_context->makeCurrent(this);
QOpenGLPaintDevice device(size());
Qt::ScreenOrientation screenOrientation = QGuiApplication::primaryScreen()->primaryOrientation();
Qt::ScreenOrientation appOrientation = orientation();
QRect rect(0, 0, width(), height());
QRect mapped = QScreen::mapBetween(appOrientation, screenOrientation, rect);
QPainterPath path;
path.addEllipse(mapped);
QPainter painter(&device);
painter.setTransform(QScreen::transformBetween(appOrientation, screenOrientation, rect));
painter.fillRect(mapped, Qt::white);
painter.setRenderHint(QPainter::Antialiasing);
painter.fillPath(path, Qt::blue);
QFont font;
font.setPixelSize(64);
painter.setFont(font);
painter.drawText(mapped, Qt::AlignCenter, "Hello");
painter.end();
m_context->swapBuffers(this);
}