Add Polar chart support

This commit also heavily refactors things as polar chart needs
separate implementation of various classes that previously
only needed one, such as ChartAxis and ChartLayout.

Task-number: QTRD-1757
Change-Id: I3d3db23920314987ceef3ae92879960b833b7136
Reviewed-by: Miikka Heikkinen <miikka.heikkinen@digia.com>

9 files changed, 301 insertions, 5 deletions

diff --git a/examples/donutbreakdown/donutbreakdownchart.cpp b/examples/donutbreakdown/donutbreakdownchart.cpp
index 6509e464..37130f01 100644
--- a/examples/donutbreakdown/donutbreakdownchart.cpp
+++ b/examples/donutbreakdown/donutbreakdownchart.cpp
@@ -26,7 +26,7 @@ QTCOMMERCIALCHART_USE_NAMESPACE
 
 //![1]
 DonutBreakdownChart::DonutBreakdownChart(QGraphicsItem *parent, Qt::WindowFlags wFlags)
-    : QChart(parent, wFlags)
+    : QChart(QChart::ChartTypeCartesian, parent, wFlags)
 {
     // create the series for main center pie
     m_mainSeries = new QPieSeries();
diff --git a/examples/examples.pro b/examples/examples.pro
index ab406af3..716dce54 100644
--- a/examples/examples.pro
+++ b/examples/examples.pro
@@ -31,7 +31,8 @@ SUBDIRS += \
            donutchart \
            multiaxis \
            legendmarkers \
-           logvalueaxis
+           logvalueaxis \
+           polarchart
 
 !linux-arm*: {
 SUBDIRS += \
diff --git a/examples/piechartdrilldown/drilldownchart.cpp b/examples/piechartdrilldown/drilldownchart.cpp
index 96de458c..47d83ade 100644
--- a/examples/piechartdrilldown/drilldownchart.cpp
+++ b/examples/piechartdrilldown/drilldownchart.cpp
@@ -23,7 +23,7 @@
 QTCOMMERCIALCHART_USE_NAMESPACE
 
 DrilldownChart::DrilldownChart(QGraphicsItem *parent, Qt::WindowFlags wFlags)
-    : QChart(parent, wFlags),
+    : QChart(QChart::ChartTypeCartesian, parent, wFlags),
       m_currentSeries(0)
 {
 
diff --git a/examples/polarchart/chartview.cpp b/examples/polarchart/chartview.cpp
new file mode 100644
index 00000000..fc53a536
--- /dev/null
+++ b/examples/polarchart/chartview.cpp
@@ -0,0 +1,111 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc
+** All rights reserved.
+** For any questions to Digia, please use contact form at http://qt.digia.com
+**
+** This file is part of the Qt Commercial Charts Add-on.
+**
+** $QT_BEGIN_LICENSE$
+** Licensees holding valid Qt Commercial licenses may use this file in
+** accordance with the Qt Commercial License Agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.
+**
+** If you have questions regarding the use of this file, please use
+** contact form at http://qt.digia.com
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "chartview.h"
+#include <QMouseEvent>
+#include <QDebug>
+#include <QAbstractAxis>
+#include <QValueAxis>
+
+QTCOMMERCIALCHART_USE_NAMESPACE
+
+ChartView::ChartView(QWidget *parent)
+    : QChartView(parent)
+{
+}
+
+//![1]
+void ChartView::keyPressEvent(QKeyEvent *event)
+{
+    switch (event->key()) {
+    case Qt::Key_Plus:
+        chart()->zoomIn();
+        break;
+    case Qt::Key_Minus:
+        chart()->zoomOut();
+        break;
+    case Qt::Key_Left:
+        chart()->scroll(-1.0, 0);
+        break;
+    case Qt::Key_Right:
+        chart()->scroll(1.0, 0);
+        break;
+    case Qt::Key_Up:
+        chart()->scroll(0, 1.0);
+        break;
+    case Qt::Key_Down:
+        chart()->scroll(0, -1.0);
+        break;
+    case Qt::Key_Space:
+        switchChartType();
+        break;
+    default:
+        QGraphicsView::keyPressEvent(event);
+        break;
+    }
+}
+//![1]
+
+//![2]
+void ChartView::switchChartType()
+{
+    QChart *newChart;
+    QChart *oldChart = chart();
+
+    if (oldChart->chartType() == QChart::ChartTypeCartesian)
+        newChart = new QPolarChart();
+    else
+        newChart = new QChart();
+
+    // Move series and axes from old chart to new one
+    QList<QAbstractSeries *> seriesList = oldChart->series();
+    QList<QAbstractAxis *> axisList = oldChart->axes();
+    QList<QPair<qreal, qreal>> axisRanges;
+
+    foreach (QAbstractAxis *axis, axisList) {
+        QValueAxis *valueAxis = static_cast<QValueAxis *>(axis);
+        axisRanges.append(QPair<qreal, qreal>(valueAxis->min(), valueAxis->max()));
+    }
+
+    foreach (QAbstractSeries *series, seriesList)
+        oldChart->removeSeries(series);
+
+    foreach (QAbstractAxis *axis, axisList) {
+        oldChart->removeAxis(axis);
+        newChart->addAxis(axis, axis->alignment());
+    }
+
+    foreach (QAbstractSeries *series, seriesList) {
+        newChart->addSeries(series);
+        foreach (QAbstractAxis *axis, axisList)
+            series->attachAxis(axis);
+    }
+
+    int count = 0;
+    foreach (QAbstractAxis *axis, axisList) {
+        axis->setRange(axisRanges[count].first, axisRanges[count].second);
+        count++;
+    }
+
+    newChart->setTitle(oldChart->title());
+    setChart(newChart);
+    delete oldChart;
+}
+//![2]
diff --git a/examples/polarchart/chartview.h b/examples/polarchart/chartview.h
new file mode 100644
index 00000000..c4584ac8
--- /dev/null
+++ b/examples/polarchart/chartview.h
@@ -0,0 +1,41 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc
+** All rights reserved.
+** For any questions to Digia, please use contact form at http://qt.digia.com
+**
+** This file is part of the Qt Commercial Charts Add-on.
+**
+** $QT_BEGIN_LICENSE$
+** Licensees holding valid Qt Commercial licenses may use this file in
+** accordance with the Qt Commercial License Agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.
+**
+** If you have questions regarding the use of this file, please use
+** contact form at http://qt.digia.com
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef CHARTVIEW_H
+#define CHARTVIEW_H
+
+#include <QChartView>
+#include <QPolarChart>
+
+QTCOMMERCIALCHART_USE_NAMESPACE
+
+class ChartView : public QChartView
+{
+public:
+    ChartView(QWidget *parent = 0);
+
+protected:
+    void keyPressEvent(QKeyEvent *event);
+
+private:
+    void switchChartType();
+};
+
+#endif
diff --git a/examples/polarchart/main.cpp b/examples/polarchart/main.cpp
new file mode 100644
index 00000000..7b3b38d8
--- /dev/null
+++ b/examples/polarchart/main.cpp
@@ -0,0 +1,137 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc
+** All rights reserved.
+** For any questions to Digia, please use contact form at http://qt.digia.com
+**
+** This file is part of the Qt Commercial Charts Add-on.
+**
+** $QT_BEGIN_LICENSE$
+** Licensees holding valid Qt Commercial licenses may use this file in
+** accordance with the Qt Commercial License Agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.
+**
+** If you have questions regarding the use of this file, please use
+** contact form at http://qt.digia.com
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "chartview.h"
+#include <QApplication>
+#include <QMainWindow>
+#include <QScatterSeries>
+#include <QLineSeries>
+#include <QSplineSeries>
+#include <QAreaSeries>
+#include <QValueAxis>
+#include <QPolarChart>
+#include <QDebug>
+
+QTCOMMERCIALCHART_USE_NAMESPACE
+
+int main(int argc, char *argv[])
+{
+    QApplication a(argc, argv);
+
+    const qreal angularMin = -100;
+    const qreal angularMax = 100;
+
+    const qreal radialMin = -100;
+    const qreal radialMax = 100;
+
+    QScatterSeries *series1 = new QScatterSeries();
+    series1->setName("scatter");
+    for (int i = angularMin; i <= angularMax; i += 10)
+        series1->append(i, (i / radialMax) * radialMax + 8.0);
+
+    QSplineSeries *series2 = new QSplineSeries();
+    series2->setName("spline");
+    for (int i = angularMin; i <= angularMax; i += 10)
+        series2->append(i, (i / radialMax) * radialMax);
+
+    QLineSeries *series3 = new QLineSeries();
+    series3->setName("star outer");
+    qreal ad = (angularMax - angularMin) / 8;
+    qreal rd = (radialMax - radialMin) / 3 * 1.3;
+    series3->append(angularMin, radialMax);
+    series3->append(angularMin + ad*1, radialMin + rd);
+    series3->append(angularMin + ad*2, radialMax);
+    series3->append(angularMin + ad*3, radialMin + rd);
+    series3->append(angularMin + ad*4, radialMax);
+    series3->append(angularMin + ad*5, radialMin + rd);
+    series3->append(angularMin + ad*6, radialMax);
+    series3->append(angularMin + ad*7, radialMin + rd);
+    series3->append(angularMin + ad*8, radialMax);
+
+    QLineSeries *series4 = new QLineSeries();
+    series4->setName("star inner");
+    ad = (angularMax - angularMin) / 8;
+    rd = (radialMax - radialMin) / 3;
+    series4->append(angularMin, radialMax);
+    series4->append(angularMin + ad*1, radialMin + rd);
+    series4->append(angularMin + ad*2, radialMax);
+    series4->append(angularMin + ad*3, radialMin + rd);
+    series4->append(angularMin + ad*4, radialMax);
+    series4->append(angularMin + ad*5, radialMin + rd);
+    series4->append(angularMin + ad*6, radialMax);
+    series4->append(angularMin + ad*7, radialMin + rd);
+    series4->append(angularMin + ad*8, radialMax);
+
+    QAreaSeries *series5 = new QAreaSeries();
+    series5->setName("star area");
+    series5->setUpperSeries(series3);
+    series5->setLowerSeries(series4);
+    series5->setOpacity(0.5);
+
+    //![1]
+    QPolarChart *chart = new QPolarChart();
+    //![1]
+    chart->addSeries(series1);
+    chart->addSeries(series2);
+    chart->addSeries(series3);
+    chart->addSeries(series4);
+    chart->addSeries(series5);
+
+    chart->setTitle("Use arrow keys to scroll, +/- to zoom, and space to switch chart type.");
+
+    //![2]
+    QValueAxis *angularAxis = new QValueAxis();
+    angularAxis->setTickCount(9); // First and last ticks are co-located on 0/360 angle.
+    angularAxis->setLabelFormat("%.1f");
+    angularAxis->setShadesVisible(true);
+    angularAxis->setShadesBrush(QBrush(QColor(249, 249, 255)));
+    chart->addAxis(angularAxis, QPolarChart::PolarOrientationAngular);
+
+    QValueAxis *radialAxis = new QValueAxis();
+    radialAxis->setTickCount(9);
+    radialAxis->setLabelFormat("%d");
+    chart->addAxis(radialAxis, QPolarChart::PolarOrientationRadial);
+    //![2]
+
+    series1->attachAxis(radialAxis);
+    series1->attachAxis(angularAxis);
+    series2->attachAxis(radialAxis);
+    series2->attachAxis(angularAxis);
+    series3->attachAxis(radialAxis);
+    series3->attachAxis(angularAxis);
+    series4->attachAxis(radialAxis);
+    series4->attachAxis(angularAxis);
+    series5->attachAxis(radialAxis);
+    series5->attachAxis(angularAxis);
+
+    radialAxis->setRange(radialMin, radialMax);
+    angularAxis->setRange(angularMin, angularMax);
+
+    ChartView *chartView = new ChartView();
+    chartView->setChart(chart);
+    chartView->setRenderHint(QPainter::Antialiasing);
+
+    QMainWindow window;
+    window.setCentralWidget(chartView);
+    window.resize(800, 600);
+    window.show();
+
+    return a.exec();
+}
diff --git a/examples/polarchart/polarchart.pro b/examples/polarchart/polarchart.pro
new file mode 100644
index 00000000..8759c1ce
--- /dev/null
+++ b/examples/polarchart/polarchart.pro
@@ -0,0 +1,6 @@
+!include( ../examples.pri ) {
+ error( "Couldn't find the examples.pri file!" )
+}
+TARGET = polarchart
+SOURCES += main.cpp chartview.cpp
+HEADERS += chartview.h
diff --git a/examples/stackedbarchartdrilldown/drilldownchart.cpp b/examples/stackedbarchartdrilldown/drilldownchart.cpp
index 51c9147a..b2f5120d 100644
--- a/examples/stackedbarchartdrilldown/drilldownchart.cpp
+++ b/examples/stackedbarchartdrilldown/drilldownchart.cpp
@@ -24,7 +24,7 @@
 QTCOMMERCIALCHART_USE_NAMESPACE
 
 DrilldownChart::DrilldownChart(QGraphicsItem *parent, Qt::WindowFlags wFlags)
-    : QChart(parent, wFlags),
+    : QChart(QChart::ChartTypeCartesian, parent, wFlags),
       m_currentSeries(0)
 {
 }
diff --git a/examples/zoomlinechart/chart.cpp b/examples/zoomlinechart/chart.cpp
index aa109f2c..40834346 100644
--- a/examples/zoomlinechart/chart.cpp
+++ b/examples/zoomlinechart/chart.cpp
@@ -24,7 +24,7 @@
 #include <QGraphicsView>
 
 Chart::Chart(QGraphicsItem *parent, Qt::WindowFlags wFlags)
-    : QChart(parent, wFlags)
+    : QChart(QChart::ChartTypeCartesian, parent, wFlags)
 {
     // Seems that QGraphicsView (QChartView) does not grab gestures.
     // They can only be grabbed here in the QGraphicsWidget (QChart).