Axis formatter customization example

Also refactored the formatter api somewhat:

- Removed virtual from allowNegatives and allowZero and added a
setter function for those. This will make it cleaner if we need to
add similar properties to the axis formatter in the future, as
no new virtual methods can be added without breaking BC.

- Changed the labelValues array to labelStrings list, as it makes
more sense to directly format the strings in recalculate.

Change-Id: I3ea005afa984bb756845ca356b999762e0807415
Reviewed-by: Tomi Korpipää <tomi.korpipaa@digia.com>

1 files changed, 71 insertions, 0 deletions

diff --git a/examples/datavisualization/qmlaxisformatter/customformatter.h b/examples/datavisualization/qmlaxisformatter/customformatter.h
new file mode 100644
index 00000000..d439e56a
--- /dev/null
+++ b/examples/datavisualization/qmlaxisformatter/customformatter.h
@@ -0,0 +1,71 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 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 QtDataVisualization module.
+**
+** Licensees holding valid Qt Enterprise licenses may use this file in
+** accordance with the Qt Enterprise 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
+**
+****************************************************************************/
+
+#ifndef CUSTOMFORMATTER_H
+#define CUSTOMFORMATTER_H
+
+#include <QtDataVisualization/QValue3DAxisFormatter>
+#include <QtCore/QDateTime>
+#include <QtCore/QVector>
+
+using namespace QtDataVisualization;
+
+//! [2]
+class CustomFormatter : public QValue3DAxisFormatter
+{
+    //! [2]
+    Q_OBJECT
+
+    //! [1]
+    Q_PROPERTY(QDate originDate READ originDate WRITE setOriginDate NOTIFY originDateChanged)
+    //! [1]
+    //! [3]
+    Q_PROPERTY(QString selectionFormat READ selectionFormat WRITE setSelectionFormat NOTIFY selectionFormatChanged)
+    //! [3]
+public:
+    explicit CustomFormatter(QObject *parent = 0);
+    virtual ~CustomFormatter();
+
+    //! [0]
+    virtual QValue3DAxisFormatter *createNewInstance() const;
+    virtual void populateCopy(QValue3DAxisFormatter &copy) const;
+    virtual void recalculate();
+    virtual QString stringForValue(qreal value, const QString &format) const;
+    //! [0]
+
+    QDate originDate() const;
+    QString selectionFormat() const;
+
+public slots:
+    void setOriginDate(const QDate &date);
+    void setSelectionFormat(const QString &format);
+
+signals:
+    void originDateChanged(const QDate &date);
+    void selectionFormatChanged(const QString &format);
+
+private:
+    Q_DISABLE_COPY(CustomFormatter)
+
+    QDateTime valueToDateTime(qreal value) const;
+
+    QDate m_originDate;
+    QString m_selectionFormat;
+};
+
+#endif