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>

1 files changed, 151 insertions, 0 deletions

diff --git a/src/axis/chartaxiselement_p.h b/src/axis/chartaxiselement_p.h
new file mode 100644
index 00000000..0fdd207d
--- /dev/null
+++ b/src/axis/chartaxiselement_p.h
@@ -0,0 +1,151 @@
+/****************************************************************************
+**
+** 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
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the QtCommercial Chart API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+
+#ifndef CHARTAXISELEMENT_H
+#define CHARTAXISELEMENT_H
+
+#include "qchartglobal.h"
+#include "chartelement_p.h"
+#include "axisanimation_p.h"
+#include <QGraphicsItem>
+#include <QGraphicsLayoutItem>
+#include <QFont>
+
+QTCOMMERCIALCHART_BEGIN_NAMESPACE
+
+class ChartPresenter;
+class QAbstractAxis;
+
+class ChartAxisElement : public ChartElement, public QGraphicsLayoutItem
+{
+    Q_OBJECT
+public:
+    ChartAxisElement(QAbstractAxis *axis, QGraphicsItem *item, bool intervalAxis = false);
+    ~ChartAxisElement();
+
+    virtual QRectF gridGeometry() const = 0;
+    virtual void setGeometry(const QRectF &axis, const QRectF &grid) = 0;
+    virtual bool isEmpty() = 0;
+
+    void setAnimation(AxisAnimation *animation) { m_animation = animation; }
+    AxisAnimation *animation() const { return m_animation; }
+
+    QAbstractAxis *axis() const { return m_axis; }
+    void setLayout(QVector<qreal> &layout) { m_layout = layout; }
+    QVector<qreal> &layout() { return m_layout; } // Modifiable reference
+    int labelPadding() const { return 5; }
+    int titlePadding() const { return 3; }
+    void setLabels(const QStringList &labels) { m_labelsList = labels; }
+    QStringList labels() const { return m_labelsList; }
+
+    qreal min() const;
+    qreal max() const;
+
+    QRectF axisGeometry() const { return m_axisRect; }
+    void setAxisGeometry(const QRectF &axisGeometry) { m_axisRect = axisGeometry; }
+
+    QRect labelBoundingRect(const QFontMetrics &fn, const QString &label) const;
+
+    void axisSelected();
+
+    //this flag indicates that axis is used to show intervals it means labels are in between ticks
+    bool intervalAxis() const { return m_intervalAxis; }
+
+    static QStringList createValueLabels(qreal max, qreal min, int ticks, const QString &format);
+    static QStringList createLogValueLabels(qreal min, qreal max, qreal base, int ticks, const QString &format);
+    static QStringList createDateTimeLabels(qreal max, qreal min, int ticks, const QString &format);
+
+    // from QGraphicsLayoutItem
+    QRectF boundingRect() const
+    {
+        return QRectF();
+    }
+
+    // from QGraphicsLayoutItem
+    void paint(QPainter*, const QStyleOptionGraphicsItem*, QWidget*)
+    {
+    }
+
+protected:
+    virtual QVector<qreal> calculateLayout() const = 0;
+    virtual void updateLayout(QVector<qreal> &layout) = 0;
+
+    QList<QGraphicsItem *> gridItems() { return m_grid->childItems(); }
+    QList<QGraphicsItem *> labelItems() { return m_labels->childItems(); }
+    QList<QGraphicsItem *> shadeItems() { return m_shades->childItems(); }
+    QList<QGraphicsItem *> arrowItems() { return m_arrow->childItems(); }
+    QGraphicsSimpleTextItem *titleItem() const { return m_title.data(); }
+    QGraphicsItemGroup *gridGroup() { return m_grid.data(); }
+    QGraphicsItemGroup *labelGroup() { return m_labels.data(); }
+    QGraphicsItemGroup *shadeGroup() { return m_shades.data(); }
+    QGraphicsItemGroup *arrowGroup() { return m_arrow.data(); }
+
+public Q_SLOTS:
+    void handleVisibleChanged(bool visible);
+    void handleArrowVisibleChanged(bool visible);
+    void handleGridVisibleChanged(bool visible);
+    void handleLabelsVisibleChanged(bool visible);
+    void handleShadesVisibleChanged(bool visible);
+    void handleLabelsAngleChanged(int angle);
+    virtual void handleShadesBrushChanged(const QBrush &brush) = 0;
+    virtual void handleShadesPenChanged(const QPen &pen) = 0;
+    virtual void handleArrowPenChanged(const QPen &pen) = 0;
+    virtual void handleGridPenChanged(const QPen &pen) = 0;
+    void handleLabelsPenChanged(const QPen &pen);
+    void handleLabelsBrushChanged(const QBrush &brush);
+    void handleLabelsFontChanged(const QFont &font);
+    void handleTitlePenChanged(const QPen &pen);
+    void handleTitleBrushChanged(const QBrush &brush);
+    void handleTitleFontChanged(const QFont &font);
+    void handleTitleTextChanged(const QString &title);
+    void handleTitleVisibleChanged(bool visible);
+    void handleRangeChanged(qreal min, qreal max);
+
+Q_SIGNALS:
+    void clicked();
+
+private:
+    void connectSlots();
+
+    QAbstractAxis *m_axis;
+    AxisAnimation *m_animation;
+    QVector<qreal> m_layout;
+    QStringList m_labelsList;
+    QRectF m_axisRect;
+    QScopedPointer<QGraphicsItemGroup> m_grid;
+    QScopedPointer<QGraphicsItemGroup> m_arrow;
+    QScopedPointer<QGraphicsItemGroup> m_shades;
+    QScopedPointer<QGraphicsItemGroup> m_labels;
+    QScopedPointer<QGraphicsSimpleTextItem> m_title;
+    bool m_intervalAxis;
+};
+
+QTCOMMERCIALCHART_END_NAMESPACE
+
+#endif /* CHARTAXISELEMENT_H */