diff options
author | Jan-Marek Glogowski <glogow@fbihome.de> | 2022-01-09 02:15:12 +0100 |
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committer | Jan-Marek Glogowski <glogow@fbihome.de> | 2022-01-19 20:18:29 +0100 |
commit | 49ebfdd9b7cf9c5363e3e06765b3fae284ab0379 (patch) | |
tree | 09b7c894e46b543983a6c25b458037554e5b77cb /wasm-qt/source/qt5-mandelbrot/mandelbrotwidget.cxx | |
parent | bd5492275d31f59b1d269205018d1487af52426f (diff) |
WASM merge wasm-qt into static module
Change-Id: I1ed26685561fd79d26cc0844faa3dfe4c00d439a
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/128625
Tested-by: Jenkins
Reviewed-by: Jan-Marek Glogowski <glogow@fbihome.de>
Diffstat (limited to 'wasm-qt/source/qt5-mandelbrot/mandelbrotwidget.cxx')
-rw-r--r-- | wasm-qt/source/qt5-mandelbrot/mandelbrotwidget.cxx | 228 |
1 files changed, 0 insertions, 228 deletions
diff --git a/wasm-qt/source/qt5-mandelbrot/mandelbrotwidget.cxx b/wasm-qt/source/qt5-mandelbrot/mandelbrotwidget.cxx deleted file mode 100644 index 5886dd2664c0..000000000000 --- a/wasm-qt/source/qt5-mandelbrot/mandelbrotwidget.cxx +++ /dev/null @@ -1,228 +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 "mandelbrotwidget.h" -#include "mandelbrotwidget.moc" - -#include <QtGui/QPainter> -#include <QtGui/QKeyEvent> - -#include <math.h> - -const double DefaultCenterX = -0.637011; -const double DefaultCenterY = -0.0395159; -const double DefaultScale = 0.00403897; - -const double ZoomInFactor = 0.8; -const double ZoomOutFactor = 1 / ZoomInFactor; -const int ScrollStep = 20; - -MandelbrotWidget::MandelbrotWidget(QWidget* parent) - : QWidget(parent) - , centerX(DefaultCenterX) - , centerY(DefaultCenterY) - , pixmapScale(DefaultScale) - , curScale(DefaultScale) -{ - connect(&thread, &RenderThread::renderedImage, this, &MandelbrotWidget::updatePixmap); - - setWindowTitle(tr("Mandelbrot")); -#if QT_CONFIG(cursor) - setCursor(Qt::CrossCursor); -#endif - resize(550, 400); -} - -void MandelbrotWidget::paintEvent(QPaintEvent* /* event */) -{ - QPainter painter(this); - painter.fillRect(rect(), Qt::black); - - if (pixmap.isNull()) - { - painter.setPen(Qt::white); - painter.drawText(rect(), Qt::AlignCenter, tr("Rendering initial image, please wait...")); - return; - } - - if (qFuzzyCompare(curScale, pixmapScale)) - { - painter.drawPixmap(pixmapOffset, pixmap); - } - else - { - auto previewPixmap = qFuzzyCompare(pixmap.devicePixelRatioF(), qreal(1)) - ? pixmap - : pixmap.scaled(pixmap.size() / pixmap.devicePixelRatioF(), - Qt::KeepAspectRatio, Qt::SmoothTransformation); - double scaleFactor = pixmapScale / curScale; - int newWidth = int(previewPixmap.width() * scaleFactor); - int newHeight = int(previewPixmap.height() * scaleFactor); - int newX = pixmapOffset.x() + (previewPixmap.width() - newWidth) / 2; - int newY = pixmapOffset.y() + (previewPixmap.height() - newHeight) / 2; - - painter.save(); - painter.translate(newX, newY); - painter.scale(scaleFactor, scaleFactor); - - QRectF exposed = painter.transform().inverted().mapRect(rect()).adjusted(-1, -1, 1, 1); - painter.drawPixmap(exposed, previewPixmap, exposed); - painter.restore(); - } - - QString text = tr("Use mouse wheel or the '+' and '-' keys to zoom. " - "Press and hold left mouse button to scroll."); - QFontMetrics metrics = painter.fontMetrics(); - int textWidth = metrics.horizontalAdvance(text); - - painter.setPen(Qt::NoPen); - painter.setBrush(QColor(0, 0, 0, 127)); - painter.drawRect((width() - textWidth) / 2 - 5, 0, textWidth + 10, metrics.lineSpacing() + 5); - painter.setPen(Qt::white); - painter.drawText((width() - textWidth) / 2, metrics.leading() + metrics.ascent(), text); -} - -void MandelbrotWidget::resizeEvent(QResizeEvent* /* event */) -{ - thread.render(centerX, centerY, curScale, size(), devicePixelRatioF()); -} - -void MandelbrotWidget::keyPressEvent(QKeyEvent* event) -{ - switch (event->key()) - { - case Qt::Key_Plus: - zoom(ZoomInFactor); - break; - case Qt::Key_Minus: - zoom(ZoomOutFactor); - break; - case Qt::Key_Left: - scroll(-ScrollStep, 0); - break; - case Qt::Key_Right: - scroll(+ScrollStep, 0); - break; - case Qt::Key_Down: - scroll(0, -ScrollStep); - break; - case Qt::Key_Up: - scroll(0, +ScrollStep); - break; - default: - QWidget::keyPressEvent(event); - } -} - -#if QT_CONFIG(wheelevent) -void MandelbrotWidget::wheelEvent(QWheelEvent* event) -{ - const int numDegrees = event->angleDelta().y() / 8; - const double numSteps = numDegrees / double(15); - zoom(pow(ZoomInFactor, numSteps)); -} -#endif - -void MandelbrotWidget::mousePressEvent(QMouseEvent* event) -{ - if (event->button() == Qt::LeftButton) - lastDragPos = event->pos(); -} - -void MandelbrotWidget::mouseMoveEvent(QMouseEvent* event) -{ - if (event->buttons() & Qt::LeftButton) - { - pixmapOffset += event->pos() - lastDragPos; - lastDragPos = event->pos(); - update(); - } -} - -void MandelbrotWidget::mouseReleaseEvent(QMouseEvent* event) -{ - if (event->button() == Qt::LeftButton) - { - pixmapOffset += event->pos() - lastDragPos; - lastDragPos = QPoint(); - - const auto pixmapSize = pixmap.size() / pixmap.devicePixelRatioF(); - int deltaX = (width() - pixmapSize.width()) / 2 - pixmapOffset.x(); - int deltaY = (height() - pixmapSize.height()) / 2 - pixmapOffset.y(); - scroll(deltaX, deltaY); - } -} - -void MandelbrotWidget::updatePixmap(const QImage& image, double scaleFactor) -{ - if (!lastDragPos.isNull()) - return; - - pixmap = QPixmap::fromImage(image); - pixmapOffset = QPoint(); - lastDragPos = QPoint(); - pixmapScale = scaleFactor; - update(); -} - -void MandelbrotWidget::zoom(double zoomFactor) -{ - curScale *= zoomFactor; - update(); - thread.render(centerX, centerY, curScale, size(), devicePixelRatioF()); -} - -void MandelbrotWidget::scroll(int deltaX, int deltaY) -{ - centerX += deltaX * curScale; - centerY += deltaY * curScale; - update(); - thread.render(centerX, centerY, curScale, size(), devicePixelRatioF()); -} |