diff options
Diffstat (limited to 'examples/widgets/tools/plugandpaint/plugins/basictools')
4 files changed, 297 insertions, 0 deletions
diff --git a/examples/widgets/tools/plugandpaint/plugins/basictools/basictools.json b/examples/widgets/tools/plugandpaint/plugins/basictools/basictools.json new file mode 100644 index 0000000000..0967ef424b --- /dev/null +++ b/examples/widgets/tools/plugandpaint/plugins/basictools/basictools.json @@ -0,0 +1 @@ +{} diff --git a/examples/widgets/tools/plugandpaint/plugins/basictools/basictools.pro b/examples/widgets/tools/plugandpaint/plugins/basictools/basictools.pro new file mode 100644 index 0000000000..0c0a262339 --- /dev/null +++ b/examples/widgets/tools/plugandpaint/plugins/basictools/basictools.pro @@ -0,0 +1,14 @@ +#! [0] +TEMPLATE = lib +CONFIG += plugin static +QT += widgets +INCLUDEPATH += ../../app +HEADERS = basictoolsplugin.h +SOURCES = basictoolsplugin.cpp +TARGET = $$qtLibraryTarget(pnp_basictools) +DESTDIR = ../../plugins +#! [0] + +# install +target.path = $$[QT_INSTALL_EXAMPLES]/widgets/tools/plugandpaint/plugins +INSTALLS += target diff --git a/examples/widgets/tools/plugandpaint/plugins/basictools/basictoolsplugin.cpp b/examples/widgets/tools/plugandpaint/plugins/basictools/basictoolsplugin.cpp new file mode 100644 index 0000000000..a5ca14a39c --- /dev/null +++ b/examples/widgets/tools/plugandpaint/plugins/basictools/basictoolsplugin.cpp @@ -0,0 +1,191 @@ +/**************************************************************************** +** +** Copyright (C) 2015 The Qt Company Ltd. +** Contact: http://www.qt.io/licensing/ +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:BSD$ +** 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 <cmath> +#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 * std::cos(0.8 * i * Pi), + 50 + 40 * std::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] diff --git a/examples/widgets/tools/plugandpaint/plugins/basictools/basictoolsplugin.h b/examples/widgets/tools/plugandpaint/plugins/basictools/basictoolsplugin.h new file mode 100644 index 0000000000..d701c8357e --- /dev/null +++ b/examples/widgets/tools/plugandpaint/plugins/basictools/basictoolsplugin.h @@ -0,0 +1,91 @@ +/**************************************************************************** +** +** Copyright (C) 2015 The Qt Company Ltd. +** Contact: http://www.qt.io/licensing/ +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:BSD$ +** 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." +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef BASICTOOLSPLUGIN_H +#define BASICTOOLSPLUGIN_H + +//! [0] +#include <interfaces.h> + +#include <QRect> +#include <QObject> +#include <QtPlugin> +#include <QStringList> +#include <QPainterPath> +#include <QImage> + +//! [1] +class BasicToolsPlugin : public QObject, + public BrushInterface, + public ShapeInterface, + public FilterInterface +{ + Q_OBJECT +//! [4] + Q_PLUGIN_METADATA(IID "org.qt-project.Qt.Examples.PlugAndPaint.BrushInterface" FILE "basictools.json") +//! [4] + Q_INTERFACES(BrushInterface ShapeInterface FilterInterface) +//! [0] + +//! [2] +public: +//! [1] + // BrushInterface + QStringList brushes() const Q_DECL_OVERRIDE; + QRect mousePress(const QString &brush, QPainter &painter, + const QPoint &pos) Q_DECL_OVERRIDE; + QRect mouseMove(const QString &brush, QPainter &painter, + const QPoint &oldPos, const QPoint &newPos) Q_DECL_OVERRIDE; + QRect mouseRelease(const QString &brush, QPainter &painter, + const QPoint &pos) Q_DECL_OVERRIDE; + + // ShapeInterface + QStringList shapes() const Q_DECL_OVERRIDE; + QPainterPath generateShape(const QString &shape, QWidget *parent) Q_DECL_OVERRIDE; + + // FilterInterface + QStringList filters() const Q_DECL_OVERRIDE; + QImage filterImage(const QString &filter, const QImage &image, + QWidget *parent) Q_DECL_OVERRIDE; +//! [3] +}; +//! [2] //! [3] + +#endif |