1 files changed, 172 insertions, 0 deletions
diff --git a/examples/widgets/painting/transformations/renderarea.cpp b/examples/widgets/painting/transformations/renderarea.cpp
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+++ b/examples/widgets/painting/transformations/renderarea.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
+**
+** 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 Nokia Corporation 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 "renderarea.h"
+
+//! [0]
+RenderArea::RenderArea(QWidget *parent)
+    : QWidget(parent)
+{
+    QFont newFont = font();
+    newFont.setPixelSize(12);
+    setFont(newFont);
+
+    QFontMetrics fontMetrics(newFont);
+    xBoundingRect = fontMetrics.boundingRect(tr("x"));
+    yBoundingRect = fontMetrics.boundingRect(tr("y"));
+}
+//! [0]
+
+//! [1]
+void RenderArea::setOperations(const QList<Operation> &operations)
+{
+    this->operations = operations;
+    update();
+}
+//! [1]
+
+//! [2]
+void RenderArea::setShape(const QPainterPath &shape)
+{
+    this->shape = shape;
+    update();
+}
+//! [2]
+
+//! [3]
+QSize RenderArea::minimumSizeHint() const
+{
+    return QSize(182, 182);
+}
+//! [3]
+
+//! [4]
+QSize RenderArea::sizeHint() const
+{
+    return QSize(232, 232);
+}
+//! [4]
+
+//! [5]
+void RenderArea::paintEvent(QPaintEvent *event)
+{
+    QPainter painter(this);
+    painter.setRenderHint(QPainter::Antialiasing);
+    painter.fillRect(event->rect(), QBrush(Qt::white));
+
+    painter.translate(66, 66);
+//! [5]
+
+//! [6]
+    painter.save();
+    transformPainter(painter);
+    drawShape(painter);
+    painter.restore();
+//! [6]
+
+//! [7]
+    drawOutline(painter);
+//! [7]
+
+//! [8]
+    transformPainter(painter);
+    drawCoordinates(painter);
+}
+//! [8]
+
+//! [9]
+void RenderArea::drawCoordinates(QPainter &painter)
+{
+    painter.setPen(Qt::red);
+
+    painter.drawLine(0, 0, 50, 0);
+    painter.drawLine(48, -2, 50, 0);
+    painter.drawLine(48, 2, 50, 0);
+    painter.drawText(60 - xBoundingRect.width() / 2,
+                     0 + xBoundingRect.height() / 2, tr("x"));
+
+    painter.drawLine(0, 0, 0, 50);
+    painter.drawLine(-2, 48, 0, 50);
+    painter.drawLine(2, 48, 0, 50);
+    painter.drawText(0 - yBoundingRect.width() / 2,
+                     60 + yBoundingRect.height() / 2, tr("y"));
+}
+//! [9]
+
+//! [10]
+void RenderArea::drawOutline(QPainter &painter)
+{
+    painter.setPen(Qt::darkGreen);
+    painter.setPen(Qt::DashLine);
+    painter.setBrush(Qt::NoBrush);
+    painter.drawRect(0, 0, 100, 100);
+}
+//! [10]
+
+//! [11]
+void RenderArea::drawShape(QPainter &painter)
+{
+    painter.fillPath(shape, Qt::blue);
+}
+//! [11]
+
+//! [12]
+void RenderArea::transformPainter(QPainter &painter)
+{
+    for (int i = 0; i < operations.size(); ++i) {
+        switch (operations[i]) {
+        case Translate:
+            painter.translate(50, 50);
+            break;
+        case Scale:
+            painter.scale(0.75, 0.75);
+            break;
+        case Rotate:
+            painter.rotate(60);
+            break;
+        case NoTransformation:
+        default:
+            ;
+        }
+    }
+}
+//! [12]