first re-commit.

swbarwidget.h

@@ -0,0 +1,68 @@
+/***************************************************************************
+
+    source::worx raDIYo
+    Copyright © 2020-2022 c.holzheuer
+    chris@sourceworx.org
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+***************************************************************************/
+
+
+#ifndef SWBARWIDGET_H
+#define SWBARWIDGET_H
+
+#include <QWidget>
+
+#include <raDIYoglobals.h>
+#include <swdialhandler.h>
+#include <swrangevalue.h>
+
+
+/**
+ * @brief Abstrakte Basisklasse für Balkendiagramme.
+ * @see SWDialHandler
+ * @see SWVolumeWidget
+ * @see SWSpectrumWidget
+ */
+
+class SWBarWidget : public QWidget, public SWDialHandler, public SWRangeValue
+{
+    Q_OBJECT
+
+public:
+
+    explicit  SWBarWidget( QWidget* parent = 0 );
+    virtual  ~SWBarWidget() = default;
+
+    virtual void paintEvent( QPaintEvent* event ) override = 0;
+
+    int  numBars();
+    void setNumBars( int bars );
+
+    int  numBlocks();
+    void setNumBlocks( int blocks );
+
+    int  padding();
+    void setPadding( int padding );
+
+    void setColorRange( const QStringList& colorlist );
+    void setColorRange( const SWColorVec& colorlist );
+
+protected:
+
+    QColor getBlockColor( int x, int y );
+
+    int     _numBars    = -1;
+    int     _numBlocks  = -1;
+    int     _padding    =  3;
+
+    SWColorVec  _colors;
+
+};
+
+
+#endif // SWBARWIDGET_H