Add testing of renderToImage to scatter test

Change-Id: I03c3868ac7c98658fafa71c19409eb3afe851a10
Reviewed-by: Tomi Korpipää <tomi.korpipaa@digia.com>

3 files changed, 35 insertions, 3 deletions

diff --git a/tests/scattertest/main.cpp b/tests/scattertest/main.cpp
index 50c73901..207da530 100644
--- a/tests/scattertest/main.cpp
+++ b/tests/scattertest/main.cpp
@@ -129,6 +129,9 @@ int main(int argc, char **argv)
     QPushButton *testReverseButton = new QPushButton(widget);
     testReverseButton->setText(QStringLiteral("Test Axis Reversing"));
 
+    QPushButton *renderToImageButton = new QPushButton(widget);
+    renderToImageButton->setText(QStringLiteral("Render the graph to an image"));
+
     QLinearGradient grBtoY(0, 0, 100, 0);
     grBtoY.setColorAt(1.0, Qt::black);
     grBtoY.setColorAt(0.67, Qt::blue);
@@ -270,7 +273,8 @@ int main(int argc, char **argv)
     vLayout->addWidget(startTimerButton, 0, Qt::AlignTop);
     vLayout->addWidget(massiveDataTestButton, 0, Qt::AlignTop);
     vLayout->addWidget(testItemChangesButton, 0, Qt::AlignTop);
-    vLayout->addWidget(testReverseButton, 1, Qt::AlignTop);
+    vLayout->addWidget(testReverseButton, 0, Qt::AlignTop);
+    vLayout->addWidget(renderToImageButton, 1, Qt::AlignTop);
 
     vLayout2->addWidget(gradientBtoYPB, 0, Qt::AlignTop);
     vLayout2->addWidget(fpsLabel, 0, Qt::AlignTop);
@@ -299,8 +303,6 @@ int main(int argc, char **argv)
     vLayout2->addWidget(new QLabel(QStringLiteral("Axis label rotation")));
     vLayout2->addWidget(axisLabelRotationSlider, 1, Qt::AlignTop);
 
-    widget->show();
-
     ScatterDataModifier *modifier = new ScatterDataModifier(chart);
 
     QObject::connect(fontSizeSlider, &QSlider::valueChanged, modifier,
@@ -352,6 +354,8 @@ int main(int argc, char **argv)
                      &ScatterDataModifier::testItemChanges);
     QObject::connect(testReverseButton, &QPushButton::clicked, modifier,
                      &ScatterDataModifier::testAxisReverse);
+    QObject::connect(renderToImageButton, &QPushButton::clicked, modifier,
+                     &ScatterDataModifier::renderToImage);
     QObject::connect(gradientBtoYPB, &QPushButton::clicked, modifier,
                      &ScatterDataModifier::setGradient);
     QObject::connect(themeButton, &QPushButton::clicked, modifier,
@@ -396,7 +400,12 @@ int main(int argc, char **argv)
 
     modifier->setFpsLabel(fpsLabel);
 
+    chart->setGeometry(QRect(0, 0, 800, 800));
+
     modifier->start();
+    modifier->renderToImage(); // Initial hidden render
+
+    widget->show();
 
     return app.exec();
 }
diff --git a/tests/scattertest/scatterchart.cpp b/tests/scattertest/scatterchart.cpp
index e498b2da..c00c526a 100644
--- a/tests/scattertest/scatterchart.cpp
+++ b/tests/scattertest/scatterchart.cpp
@@ -948,6 +948,28 @@ void ScatterDataModifier::toggleAxisTitleFixed(bool enabled)
     m_chart->axisZ()->setTitleFixed(enabled);
 }
 
+void ScatterDataModifier::renderToImage()
+{
+    QImage renderedImage8AA = m_chart->renderToImage(8);
+    QImage renderedImageNoAA = m_chart->renderToImage(0);
+    QImage renderedImage8AASmall = m_chart->renderToImage(8, QSize(100, 100));
+    QImage renderedImageNoAASmall = m_chart->renderToImage(0, QSize(100, 100));
+
+    if (m_chart->isVisible()) {
+        renderedImage8AA.save(QStringLiteral("./renderedImage8AA_visible.png"));
+        renderedImageNoAA.save(QStringLiteral("./renderedImageNoAA_visible.png"));
+        renderedImage8AASmall.save(QStringLiteral("./renderedImage8AASmall_visible.png"));
+        renderedImageNoAASmall.save(QStringLiteral("./renderedImageNoAASmall_visible.png"));
+        qDebug() << "Visible images rendered!";
+    } else {
+        renderedImage8AA.save(QStringLiteral("./renderedImage8AA_hidden.png"));
+        renderedImageNoAA.save(QStringLiteral("./renderedImageNoAA_hidden.png"));
+        renderedImage8AASmall.save(QStringLiteral("./renderedImage8AASmall_hidden.png"));
+        renderedImageNoAASmall.save(QStringLiteral("./renderedImageNoAASmall_hidden.png"));
+        qDebug() << "Hidden images rendered!";
+    }
+}
+
 void ScatterDataModifier::changeShadowQuality(int quality)
 {
     QAbstract3DGraph::ShadowQuality sq = QAbstract3DGraph::ShadowQuality(quality);
diff --git a/tests/scattertest/scatterchart.h b/tests/scattertest/scatterchart.h
index 983b605a..97c3b1f9 100644
--- a/tests/scattertest/scatterchart.h
+++ b/tests/scattertest/scatterchart.h
@@ -92,6 +92,7 @@ public slots:
     void changeLabelRotation(int rotation);
     void toggleAxisTitleVisibility(bool enabled);
     void toggleAxisTitleFixed(bool enabled);
+    void renderToImage();
 
 signals:
     void shadowQualityChanged(int quality);