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-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the examples of Qt for Python.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, you may use this file under the terms of the BSD license
-** as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-** * Redistributions of source code must retain the above copyright
-** notice, this list of conditions and the following disclaimer.
-** * Redistributions in binary form must reproduce the above copyright
-** notice, this list of conditions and the following disclaimer in
-** the documentation and/or other materials provided with the
-** distribution.
-** * Neither the name of The Qt Company Ltd nor the names of its
-** contributors may be used to endorse or promote products derived
-** from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#include <QtWidgets>
-#include <math.h>
-
-#include "window.h"
-
-Window::Window(QWidget *parent)
- : QWidget(parent)
-{
- text = QString("Support for text rendering and layout in Qt 4 has been "
- "redesigned around a system that allows textual content to "
- "be represented in a more flexible way than was possible "
- "with Qt 3. Qt 4 also provides a more convenient "
- "programming interface for editing documents. These "
- "improvements are made available through a reimplementation "
- "of the existing text rendering engine, and the "
- "introduction of several new classes. "
- "See the relevant module overview for a detailed discussion "
- "of this framework. The following sections provide a brief "
- "overview of the main concepts behind Scribe.");
-
- setWindowTitle(tr("Plain Text Layout"));
-}
-
-void Window::paintEvent(QPaintEvent *event)
-{
-//! [0]
- QTextLayout textLayout(text, font);
- qreal margin = 10;
- qreal radius = qMin(width()/2.0, height()/2.0) - margin;
- QFontMetrics fm(font);
-
- qreal lineHeight = fm.height();
- qreal y = 0;
-
- textLayout.beginLayout();
-
- while (1) {
- // create a new line
- QTextLine line = textLayout.createLine();
- if (!line.isValid())
- break;
-
- qreal x1 = qMax(0.0, pow(pow(radius,2)-pow(radius-y,2), 0.5));
- qreal x2 = qMax(0.0, pow(pow(radius,2)-pow(radius-(y+lineHeight),2), 0.5));
- qreal x = qMax(x1, x2) + margin;
- qreal lineWidth = (width() - margin) - x;
-
- line.setLineWidth(lineWidth);
- line.setPosition(QPointF(x, margin+y));
- y += line.height();
- }
-
- textLayout.endLayout();
-
- QPainter painter;
- painter.begin(this);
- painter.setRenderHint(QPainter::Antialiasing);
- painter.fillRect(rect(), Qt::white);
- painter.setBrush(QBrush(Qt::black));
- painter.setPen(QPen(Qt::black));
- textLayout.draw(&painter, QPoint(0,0));
-
- painter.setBrush(QBrush(QColor("#a6ce39")));
- painter.setPen(QPen(Qt::black));
- painter.drawEllipse(QRectF(-radius, margin, 2*radius, 2*radius));
- painter.end();
-//! [0]
-}