diff options
Diffstat (limited to 'src/gui/doc/snippets/plaintextlayout/window.cpp')
| -rw-r--r-- | src/gui/doc/snippets/plaintextlayout/window.cpp | 150 |
1 files changed, 49 insertions, 101 deletions
diff --git a/src/gui/doc/snippets/plaintextlayout/window.cpp b/src/gui/doc/snippets/plaintextlayout/window.cpp index 9bc4df05f1..77ed9d4e54 100644 --- a/src/gui/doc/snippets/plaintextlayout/window.cpp +++ b/src/gui/doc/snippets/plaintextlayout/window.cpp @@ -1,118 +1,66 @@ -/**************************************************************************** -** -** Copyright (C) 2016 The Qt Company Ltd. -** Contact: https://www.qt.io/licensing/ -** -** This file is part of the documentation of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:BSD$ -** 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." -** -** $QT_END_LICENSE$ -** -****************************************************************************/ +// Copyright (C) 2016 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause +#include <QPainter> +#include <QTextLayout> +#include <QWidget> -#include <QtGui> -#include <math.h> - -#include "window.h" - -Window::Window(QWidget *parent) - : QWidget(parent) +namespace plaintextlayout { +class Window : public QWidget { - 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."); +protected: + void paintEvent(QPaintEvent *event) override; - setWindowTitle(tr("Plain Text Layout")); -} +private: + QFont font; + QString text; +}; 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); +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; +qreal lineHeight = fm.height(); +qreal y = 0; - textLayout.beginLayout(); +textLayout.beginLayout(); - while (1) { - // create a new line - QTextLine line = textLayout.createLine(); - if (!line.isValid()) - break; +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; + 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(); - } + line.setLineWidth(lineWidth); + line.setPosition(QPointF(x, margin+y)); + y += line.height(); +} - textLayout.endLayout(); +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)); +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(); +painter.setBrush(QBrush(QColor("#a6ce39"))); +painter.setPen(QPen(Qt::black)); +painter.drawEllipse(QRectF(-radius, margin, 2*radius, 2*radius)); +painter.end(); //! [0] + +Q_UNUSED(event); } +} // plaintextlayout |