Add example of using image as a brush for scatter series

The ScatterChart Example is modified so that it shows how to use an
image as a brush for scatter series. The image is a star and it's
created using QPainterPath.

Task-number: QTRD-2078
Change-Id: Ie92ad56efafaf12af2efe4424be63060f812f9e2
Reviewed-by: Miikka Heikkinen <miikka.heikkinen@digia.com>

1 files changed, 44 insertions, 2 deletions

diff --git a/examples/scatterchart/chartview.cpp b/examples/scatterchart/chartview.cpp
index 84ccf533..6328cc24 100644
--- a/examples/scatterchart/chartview.cpp
+++ b/examples/scatterchart/chartview.cpp
@@ -20,6 +20,12 @@
 
 #include "chartview.h"
 #include <QScatterSeries>
+#include <QLegendMarker>
+#include <QImage>
+#include <QPainter>
+#include <qmath.h>
+
+const float Pi = 3.14159f;
 
 ChartView::ChartView(QWidget *parent) :
     QChartView(new QChart(), parent)
@@ -32,8 +38,13 @@ ChartView::ChartView(QWidget *parent) :
 
     QScatterSeries *series1 = new QScatterSeries();
     series1->setName("scatter2");
-    series1->setMarkerShape(QScatterSeries::MarkerShapeCircle);
+    series1->setMarkerShape(QScatterSeries::MarkerShapeRectangle);
     series1->setMarkerSize(20.0);
+
+    QScatterSeries *series2 = new QScatterSeries();
+    series2->setName("scatter3");
+    series2->setMarkerShape(QScatterSeries::MarkerShapeRectangle);
+    series2->setMarkerSize(30.0);
     //![1]
 
     //![2]
@@ -44,14 +55,45 @@ ChartView::ChartView(QWidget *parent) :
     series0->append(10, 5);
 
     *series1 << QPointF(1, 1) << QPointF(3, 3) << QPointF(7, 6) << QPointF(8, 3) << QPointF(10, 2);
+    *series2 << QPointF(1, 5) << QPointF(4, 6) << QPointF(6, 3) << QPointF(9, 5);
     //![2]
 
     //![3]
+    QPainterPath starPath;
+    starPath.moveTo(30, 15);
+    for (int i = 1; i < 5; ++i) {
+        starPath.lineTo(15 + 15 * qCos(0.8 * i * Pi),
+                        15 + 15 * qSin(0.8 * i * Pi));
+    }
+    starPath.closeSubpath();
+
+    QImage star(30, 30, QImage::Format_ARGB32);
+    star.fill(Qt::transparent);
+
+    QPainter painter(&star);
+    painter.setRenderHint(QPainter::Antialiasing);
+    painter.setPen(QRgb(0xf6a625));
+    painter.setBrush(painter.pen().color());
+    painter.drawPath(starPath);
+
+    series2->setBrush(star);
+    series2->setPen(Qt::NoPen);
+    //![3]
+
+    //![4]
     setRenderHint(QPainter::Antialiasing);
     chart()->addSeries(series0);
     chart()->addSeries(series1);
+    chart()->addSeries(series2);
+
     chart()->setTitle("Simple scatterchart example");
     chart()->createDefaultAxes();
     chart()->setDropShadowEnabled(false);
-    //![3]
+    //![4]
+
+    //![5]
+    QList<QLegendMarker *> markers = chart()->legend()->markers(series2);
+    for (int i = 0; i < markers.count(); i++)
+        markers.at(i)->setBrush(painter.pen().color());
+    //![5]
 }