1 files changed, 152 insertions, 0 deletions
diff --git a/tests/manual/examples/widgets/tools/plugandpaint/app/paintarea.cpp b/tests/manual/examples/widgets/tools/plugandpaint/app/paintarea.cpp
new file mode 100644
index 0000000000..3596f7979c
--- /dev/null
+++ b/tests/manual/examples/widgets/tools/plugandpaint/app/paintarea.cpp
@@ -0,0 +1,152 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+
+#include "paintarea.h"
+#include "interfaces.h"
+
+#include <QMouseEvent>
+#include <QPainter>
+
+PaintArea::PaintArea(QWidget *parent) : QWidget(parent)
+{
+    setAttribute(Qt::WA_StaticContents);
+    setAttribute(Qt::WA_OpaquePaintEvent);
+
+    theImage.fill(qRgb(255, 255, 255));
+}
+
+bool PaintArea::openImage(const QString &fileName)
+{
+    QImage image;
+    if (!image.load(fileName))
+        return false;
+
+    setImage(image);
+    return true;
+}
+
+bool PaintArea::saveImage(const QString &fileName, const char *fileFormat)
+{
+    return theImage.save(fileName, fileFormat);
+}
+
+void PaintArea::setImage(const QImage &image)
+{
+    theImage = image.convertToFormat(QImage::Format_RGB32);
+    update();
+    updateGeometry();
+}
+
+void PaintArea::insertShape(const QPainterPath &path)
+{
+    pendingPath = path;
+#ifndef QT_NO_CURSOR
+    setCursor(Qt::CrossCursor);
+#endif
+}
+
+void PaintArea::setBrushColor(const QColor &color)
+{
+    this->color = color;
+}
+
+void PaintArea::setBrushWidth(int width)
+{
+    thickness = width;
+}
+
+//! [0]
+void PaintArea::setBrush(BrushInterface *brushInterface, const QString &brush)
+{
+    this->brushInterface = brushInterface;
+    this->brush = brush;
+}
+//! [0]
+
+QSize PaintArea::sizeHint() const
+{
+    return theImage.size();
+}
+
+void PaintArea::paintEvent(QPaintEvent * /* event */)
+{
+    QPainter painter(this);
+    painter.drawImage(QPoint(0, 0), theImage);
+}
+
+void PaintArea::mousePressEvent(QMouseEvent *event)
+{
+    if (event->button() == Qt::LeftButton) {
+        if (!pendingPath.isEmpty()) {
+            QPainter painter(&theImage);
+            setupPainter(painter);
+
+            const QRectF boundingRect = pendingPath.boundingRect();
+            QLinearGradient gradient(boundingRect.topRight(),
+                                     boundingRect.bottomLeft());
+            gradient.setColorAt(0.0, QColor(color.red(), color.green(),
+                                            color.blue(), 63));
+            gradient.setColorAt(1.0, QColor(color.red(), color.green(),
+                                            color.blue(), 191));
+            painter.setBrush(gradient);
+            painter.translate(event->position().toPoint() - boundingRect.center());
+            painter.drawPath(pendingPath);
+
+            pendingPath = QPainterPath();
+#ifndef QT_NO_CURSOR
+            unsetCursor();
+#endif
+            update();
+        } else {
+            if (brushInterface) {
+                QPainter painter(&theImage);
+                setupPainter(painter);
+                const QRect rect = brushInterface->mousePress(brush, painter,
+                                                              event->position().toPoint());
+                update(rect);
+            }
+
+            lastPos = event->position().toPoint();
+        }
+    }
+}
+
+//! [1]
+void PaintArea::mouseMoveEvent(QMouseEvent *event)
+{
+    if ((event->buttons() & Qt::LeftButton) && lastPos != QPoint(-1, -1)) {
+        if (brushInterface) {
+            QPainter painter(&theImage);
+            setupPainter(painter);
+            const QRect rect = brushInterface->mouseMove(brush, painter, lastPos,
+                                                         event->position().toPoint());
+            update(rect);
+        }
+
+        lastPos = event->position().toPoint();
+    }
+}
+//! [1]
+
+void PaintArea::mouseReleaseEvent(QMouseEvent *event)
+{
+    if (event->button() == Qt::LeftButton && lastPos != QPoint(-1, -1)) {
+        if (brushInterface) {
+            QPainter painter(&theImage);
+            setupPainter(painter);
+            QRect rect = brushInterface->mouseRelease(brush, painter,
+                                                      event->position().toPoint());
+            update(rect);
+        }
+
+        lastPos = QPoint(-1, -1);
+    }
+}
+
+void PaintArea::setupPainter(QPainter &painter)
+{
+    painter.setRenderHint(QPainter::Antialiasing, true);
+    painter.setPen(QPen(color, thickness, Qt::SolidLine, Qt::RoundCap,
+                   Qt::RoundJoin));
+}