--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/examples/tools/plugandpaintplugins/basictools/basictoolsplugin.cpp Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,198 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (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 Technology Preview License Agreement accompanying
+** this package.
+**
+** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@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