first re-commit.

swvolumewidget.cpp

@@ -0,0 +1,167 @@
+/***************************************************************************
+
+    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.
+
+***************************************************************************/
+
+
+#include <QDebug>
+#include <QPainter>
+#include <QMouseEvent>
+#include <QtGlobal>
+
+#include <raDIYo.h>
+#include <swvolumewidget.h>
+
+
+/**
+ * @brief Standardkonstruktor.  Block- und Balkenanzahl auf 32
+ * @see setNumblocks
+ * @see setNumBars
+ */
+
+SWVolumeWidget::SWVolumeWidget( QWidget* parent )
+    : SWBarWidget( parent )
+{
+    setNumBlocks( 32 );
+    setNumBars( 32 );
+
+}
+
+
+/**
+ * @brief Wird aufgerufen, wenn das (externe) Dial gedreht wurde.
+ *
+ * Hier wird _ein_  Wert gesetzt, zum Beispiel Lautstärke, Bässe,
+ * Höhen etc.
+ */
+
+void SWVolumeWidget::onDialDeltaChanged( int delta )
+{
+
+ // gültigkeit sicherstellen
+    int newval = _value + delta;
+    newval = qBound( _rangeFrom, newval, _rangeTo );
+
+    if( _value == newval )
+        return;
+
+   setValue( newval );
+   update();
+
+
+}
+
+
+/**
+ * @brief Teil der Maussteuerung.
+ * @param event
+ */
+
+void SWVolumeWidget::mousePressEvent( QMouseEvent* event )
+{
+    if( event->button() == Qt::LeftButton )
+        _moving = true;
+}
+
+
+/**
+ * @brief Zieht bei gedrücktem Mousebutton die Lautstärke hoch bzw. runter
+ * @param event
+ */
+
+void SWVolumeWidget::mouseMoveEvent( QMouseEvent* event )
+{
+
+    if( ( event->buttons() & Qt::LeftButton ) && _moving )
+    {       
+        double newX = (double) _rangeTo * (double) event->pos().x() / ( rect().width() - _frameOffset );
+        int lstVal = _value;
+        _value = qRound( newX );
+        int delta = _value - lstVal;
+        if( !delta )
+           return;
+        update();
+        emit deltaChanged( delta > 0 ? 1 : -1 );
+
+    }
+
+}
+
+
+/**
+ * @brief Teil der Maussteuerung.
+ * @param event
+ */
+
+void SWVolumeWidget::mouseReleaseEvent( QMouseEvent* event )
+{
+    if( event->button() == Qt::LeftButton && _moving )
+        _moving = false;
+}
+
+
+/**
+ * @brief Zeichnet das Balkendiagramm.
+ * @param event
+ */
+
+void SWVolumeWidget::paintEvent( QPaintEvent* event )
+{
+
+    Q_UNUSED( event )
+
+
+    QPainter painter( this );
+
+    // wir malen ein dunkles Rähmchen um eine graue Fläche
+    QPen pen( QColor( 66,66,66 ) );
+    pen.setWidth( 2 );
+    painter.setPen( pen );
+    QRect frame = rect();
+    frame.adjust( _frameOffset, _frameOffset, -_frameOffset, -_frameOffset );
+    painter.fillRect( frame, QColor( 44,44,44 ) );
+    painter.drawRoundedRect( frame, 2, 2 );
+
+    double sizeX = frame.width();
+    double sizeY = frame.height();
+
+    int blockWidth  = qRound( sizeX / _numBars );
+    int blockHeight = qRound( sizeY / _numBlocks );
+
+    //_padding = 2;
+
+    int numColors = _colors.size();
+    double factorColors = (double) numColors /  (double) _numBlocks;
+    int blockPosX = _frameOffset + _padding;
+    int maxX = qRound( (double) _value / double( _rangeTo ) * sizeX );
+    int maxBlocks = (double) sizeY / blockHeight - 3;
+
+    for( ; blockPosX < maxX; blockPosX += blockWidth )
+    {
+        // hack
+        int numBlocks = qMin( 1 + qRound( (double) blockPosX / sizeX * maxBlocks ), maxBlocks );
+        int blockPosY = sizeY - blockHeight;// + _padding;
+        for( int j = 0; j < numBlocks; ++j )
+        {
+            QRect blockRect = QRect( blockPosX, blockPosY, blockWidth - _padding, blockHeight - _padding );
+            int colorIndex = numColors - 1 - factorColors * (double) j;
+            //int colorIndex = 2 + factorColors * (double) j;
+            painter.fillRect( blockRect, _colors[ colorIndex ] );
+            blockPosY -= blockHeight;
+        }
+
+
+    }
+
+
+}
+
+