1 files changed, 173 insertions, 0 deletions
diff --git a/examples/painting/transformations/renderarea.cpp b/examples/painting/transformations/renderarea.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui>
+
+#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]