6.5.3 clean

tests/manual/examples/widgets/tools/plugandpaint/plugins/basictools/CMakeLists.txt

@@ -0,0 +1,18 @@
+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+qt_add_plugin(pnp_basictools
+    STATIC
+    CLASS_NAME BasicToolsPlugin
+    basictoolsplugin.cpp basictoolsplugin.h
+)
+
+target_include_directories(pnp_basictools PRIVATE
+    ../../app
+)
+
+target_link_libraries(pnp_basictools PRIVATE
+    Qt6::Core
+    Qt6::Gui
+    Qt6::Widgets
+)

tests/manual/examples/widgets/tools/plugandpaint/plugins/basictools/basictools.json

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+{}

tests/manual/examples/widgets/tools/plugandpaint/plugins/basictools/basictools.pro

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+#! [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
+
+CONFIG += install_ok  # Do not cargo-cult this!
+uikit: CONFIG += debug_and_release

tests/manual/examples/widgets/tools/plugandpaint/plugins/basictools/basictoolsplugin.cpp

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+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include "basictoolsplugin.h"
+
+#include <QInputDialog>
+#include <QPainter>
+#include <QRandomGenerator>
+#include <QtMath>
+
+//! [0]
+QStringList BasicToolsPlugin::brushes() const
+{
+    return {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(QRandomGenerator::global()->bounded('A', 'Z' + 1));
+
+        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 {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 * M_PI),
+                        50 + 40 * std::sin(0.8 * i * M_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 {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) {
+                QRgb 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]

tests/manual/examples/widgets/tools/plugandpaint/plugins/basictools/basictoolsplugin.h

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+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#ifndef BASICTOOLSPLUGIN_H
+#define BASICTOOLSPLUGIN_H
+
+//! [0]
+#include <interfaces.h>
+
+#include <QImage>
+#include <QObject>
+#include <QPainterPath>
+#include <QRect>
+#include <QStringList>
+#include <QtPlugin>
+
+//! [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 override;
+    QRect mousePress(const QString &brush, QPainter &painter,
+                     const QPoint &pos) override;
+    QRect mouseMove(const QString &brush, QPainter &painter,
+                    const QPoint &oldPos, const QPoint &newPos) override;
+    QRect mouseRelease(const QString &brush, QPainter &painter,
+                       const QPoint &pos) override;
+
+    // ShapeInterface
+    QStringList shapes() const override;
+    QPainterPath generateShape(const QString &shape, QWidget *parent) override;
+
+    // FilterInterface
+    QStringList filters() const override;
+    QImage filterImage(const QString &filter, const QImage &image,
+                       QWidget *parent) override;
+//! [3]
+};
+//! [2] //! [3]
+
+#endif