Ref T509, changed to Qwt (instead of QChart) using bar chart

src/blackgui/graphs/barchart.h

@@ -0,0 +1,81 @@
+/* Copyright (C) 2019
+ * swift project Community / Contributors
+ *
+ * This file is part of swift project. It is subject to the license terms in the LICENSE file found in the top-level
+ * directory of this distribution and at http://www.swift-project.org/license.html. No part of swift project,
+ * including this file, may be copied, modified, propagated, or distributed except according to the terms
+ * contained in the LICENSE file.
+ */
+
+//! \file
+
+#ifndef BLACKGUI_GRAPH_BARCHART_H
+#define BLACKGUI_GRAPH_BARCHART_H
+
+#include "blackgui/blackguiexport.h"
+
+#include <qwt_plot.h>
+#include <qwt_scale_draw.h>
+#include <qwt_plot_multi_barchart.h>
+
+#include <QScopedPointer>
+#include <QStringList>
+#include <QList>
+
+namespace BlackGui
+{
+    namespace Graphs
+    {
+        /**
+         * For axis labels
+         */
+        class CTextScaleDraw: public QwtScaleDraw
+        {
+        public:
+            //! Constructorxs
+            CTextScaleDraw(const QStringList &texts);
+
+            //! Value to label
+            virtual QwtText label(double v) const override;
+
+            //! Labels
+            void setLabels(const QStringList &labels) { m_labels = labels; }
+
+            //! Any labels?
+            bool hasLabels() const { return !m_labels.isEmpty(); }
+
+        private:
+            QStringList m_labels;
+        };
+
+        /**
+         * Bar chart, modified version of QWT examples
+         */
+        class BLACKGUI_EXPORT CBarChart: public QwtPlot
+        {
+        public:
+            //! Constructor
+            CBarChart(QWidget * = nullptr);
+
+            //! Style
+            void setStyle(QwtPlotMultiBarChart::ChartStyle style);
+
+            //! Set number of symbols
+            void setSymbols(const QString &title, const QString &color);
+
+            //! Set number of symbols
+            void setSymbols(const QStringList &titles, const QStringList &colors);
+
+            //! Samples with 1 bar per sample
+            void setSamples1Bar(const QList<double> &samples, const QStringList &labels, Qt::Orientation orientation);
+
+        private:
+            //! Orientation
+            void setOrientation(Qt::Orientation, const QStringList &labels);
+
+            QScopedPointer<QwtPlotMultiBarChart> m_barChartItem;
+        };
+    } // ns
+} // ns
+
+#endif