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Diffstat (limited to 'examples/tools/plugandpaintplugins/basictools/basictoolsplugin.cpp')
-rw-r--r-- | examples/tools/plugandpaintplugins/basictools/basictoolsplugin.cpp | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/examples/tools/plugandpaintplugins/basictools/basictoolsplugin.cpp b/examples/tools/plugandpaintplugins/basictools/basictoolsplugin.cpp new file mode 100644 index 0000000..95b239f --- /dev/null +++ b/examples/tools/plugandpaintplugins/basictools/basictoolsplugin.cpp @@ -0,0 +1,198 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain +** additional rights. These rights are described in the Nokia Qt LGPL +** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this +** package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <QtGui> + +#include <math.h> +#include <stdlib.h> + +#include "basictoolsplugin.h" + +const float Pi = 3.14159f; + +//! [0] +QStringList BasicToolsPlugin::brushes() const +{ + return QStringList() << tr("Pencil") << tr("Air Brush") + << tr("Random Letters"); +} +//! [0] + +//! [1] +QRect BasicToolsPlugin::mousePress(const QString &brush, QPainter &painter, + const QPoint &pos) +{ + return mouseMove(brush, painter, pos, pos); +} +//! [1] + +//! [2] +QRect BasicToolsPlugin::mouseMove(const QString &brush, QPainter &painter, + const QPoint &oldPos, const QPoint &newPos) +{ + painter.save(); + + int rad = painter.pen().width() / 2; + QRect boundingRect = QRect(oldPos, newPos).normalized() + .adjusted(-rad, -rad, +rad, +rad); + QColor color = painter.pen().color(); + int thickness = painter.pen().width(); + QColor transparentColor(color.red(), color.green(), color.blue(), 0); +//! [2] //! [3] + + if (brush == tr("Pencil")) { + painter.drawLine(oldPos, newPos); + } else if (brush == tr("Air Brush")) { + int numSteps = 2 + (newPos - oldPos).manhattanLength() / 2; + + painter.setBrush(QBrush(color, Qt::Dense6Pattern)); + painter.setPen(Qt::NoPen); + + for (int i = 0; i < numSteps; ++i) { + int x = oldPos.x() + i * (newPos.x() - oldPos.x()) / (numSteps - 1); + int y = oldPos.y() + i * (newPos.y() - oldPos.y()) / (numSteps - 1); + + painter.drawEllipse(x - (thickness / 2), y - (thickness / 2), + thickness, thickness); + } + } else if (brush == tr("Random Letters")) { + QChar ch('A' + (qrand() % 26)); + + QFont biggerFont = painter.font(); + biggerFont.setBold(true); + biggerFont.setPointSize(biggerFont.pointSize() + thickness); + painter.setFont(biggerFont); + + painter.drawText(newPos, QString(ch)); + + QFontMetrics metrics(painter.font()); + boundingRect = metrics.boundingRect(ch); + boundingRect.translate(newPos); + boundingRect.adjust(-10, -10, +10, +10); + } + painter.restore(); + return boundingRect; +} +//! [3] + +//! [4] +QRect BasicToolsPlugin::mouseRelease(const QString & /* brush */, + QPainter & /* painter */, + const QPoint & /* pos */) +{ + return QRect(0, 0, 0, 0); +} +//! [4] + +//! [5] +QStringList BasicToolsPlugin::shapes() const +{ + return QStringList() << tr("Circle") << tr("Star") << tr("Text..."); +} +//! [5] + +//! [6] +QPainterPath BasicToolsPlugin::generateShape(const QString &shape, + QWidget *parent) +{ + QPainterPath path; + + if (shape == tr("Circle")) { + path.addEllipse(0, 0, 50, 50); + } else if (shape == tr("Star")) { + path.moveTo(90, 50); + for (int i = 1; i < 5; ++i) { + path.lineTo(50 + 40 * cos(0.8 * i * Pi), + 50 + 40 * sin(0.8 * i * Pi)); + } + path.closeSubpath(); + } else if (shape == tr("Text...")) { + QString text = QInputDialog::getText(parent, tr("Text Shape"), + tr("Enter text:"), + QLineEdit::Normal, tr("Qt")); + if (!text.isEmpty()) { + QFont timesFont("Times", 50); + timesFont.setStyleStrategy(QFont::ForceOutline); + path.addText(0, 0, timesFont, text); + } + } + + return path; +} +//! [6] + +//! [7] +QStringList BasicToolsPlugin::filters() const +{ + return QStringList() << tr("Invert Pixels") << tr("Swap RGB") + << tr("Grayscale"); +} +//! [7] + +//! [8] +QImage BasicToolsPlugin::filterImage(const QString &filter, const QImage &image, + QWidget * /* parent */) +{ + QImage result = image.convertToFormat(QImage::Format_RGB32); + + if (filter == tr("Invert Pixels")) { + result.invertPixels(); + } else if (filter == tr("Swap RGB")) { + result = result.rgbSwapped(); + } else if (filter == tr("Grayscale")) { + for (int y = 0; y < result.height(); ++y) { + for (int x = 0; x < result.width(); ++x) { + int pixel = result.pixel(x, y); + int gray = qGray(pixel); + int alpha = qAlpha(pixel); + result.setPixel(x, y, qRgba(gray, gray, gray, alpha)); + } + } + } + return result; +} +//! [8] + +QT_BEGIN_NAMESPACE +//! [9] +Q_EXPORT_PLUGIN2(pnp_basictools, BasicToolsPlugin) +//! [9] +QT_END_NAMESPACE |