1 files changed, 191 insertions, 0 deletions
diff --git a/examples/widgets/tools/plugandpaintplugins/basictools/basictoolsplugin.cpp b/examples/widgets/tools/plugandpaintplugins/basictools/basictoolsplugin.cpp
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index 0000000000..e0d68bac45
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+++ b/examples/widgets/tools/plugandpaintplugins/basictools/basictoolsplugin.cpp
@@ -0,0 +1,191 @@
+/****************************************************************************
+**
+** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** 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 Digia Plc and its Subsidiary(-ies) 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 <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]