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Diffstat (limited to 'examples/widgets/painting/concentriccircles/circlewidget.cpp')
-rw-r--r-- | examples/widgets/painting/concentriccircles/circlewidget.cpp | 131 |
1 files changed, 0 insertions, 131 deletions
diff --git a/examples/widgets/painting/concentriccircles/circlewidget.cpp b/examples/widgets/painting/concentriccircles/circlewidget.cpp deleted file mode 100644 index 639f9e5e4e..0000000000 --- a/examples/widgets/painting/concentriccircles/circlewidget.cpp +++ /dev/null @@ -1,131 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2016 The Qt Company Ltd. -** Contact: https://www.qt.io/licensing/ -** -** This file is part of the examples 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." -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include "circlewidget.h" - -#include <QPainter> - -#include <stdlib.h> - -//! [0] -CircleWidget::CircleWidget(QWidget *parent) - : QWidget(parent) -{ - floatBased = false; - antialiased = false; - frameNo = 0; - - setBackgroundRole(QPalette::Base); - setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding); -} -//! [0] - -//! [1] -void CircleWidget::setFloatBased(bool floatBased) -{ - this->floatBased = floatBased; - update(); -} -//! [1] - -//! [2] -void CircleWidget::setAntialiased(bool antialiased) -{ - this->antialiased = antialiased; - update(); -} -//! [2] - -//! [3] -QSize CircleWidget::minimumSizeHint() const -{ - return QSize(50, 50); -} -//! [3] - -//! [4] -QSize CircleWidget::sizeHint() const -{ - return QSize(180, 180); -} -//! [4] - -//! [5] -void CircleWidget::nextAnimationFrame() -{ - ++frameNo; - update(); -} -//! [5] - -//! [6] -void CircleWidget::paintEvent(QPaintEvent *) -{ - QPainter painter(this); - painter.setRenderHint(QPainter::Antialiasing, antialiased); - painter.translate(width() / 2, height() / 2); -//! [6] - -//! [7] - for (int diameter = 0; diameter < 256; diameter += 9) { - int delta = abs((frameNo % 128) - diameter / 2); - int alpha = 255 - (delta * delta) / 4 - diameter; -//! [7] //! [8] - if (alpha > 0) { - painter.setPen(QPen(QColor(0, diameter / 2, 127, alpha), 3)); - - if (floatBased) - painter.drawEllipse(QRectF(-diameter / 2.0, -diameter / 2.0, diameter, diameter)); - else - painter.drawEllipse(QRect(-diameter / 2, -diameter / 2, diameter, diameter)); - } - } -} -//! [8] |