Make Compressor background themeable (#7157)

data/themes/classic/style.css

@@ -996,6 +996,7 @@ lmms--gui--CompressorControlDialog {
 	qproperty-textColor: rgba(209, 216, 228, 50);
 	qproperty-graphColor: rgba(209, 216, 228, 50);
 	qproperty-resetColor: rgba(200, 100, 15, 200);
+	qproperty-backgroundColor: rgba(7, 8, 9, 255);
 }
 
 lmms--gui--CompressorControlDialog lmms--gui--Knob {

data/themes/default/style.css

@@ -1038,6 +1038,7 @@ lmms--gui--CompressorControlDialog {
 	qproperty-textColor: rgba(209, 216, 228, 50);
 	qproperty-graphColor: rgba(209, 216, 228, 50);
 	qproperty-resetColor: rgba(200, 100, 15, 200);
+	qproperty-backgroundColor: rgba(7, 8, 9, 255);
 }
 
 lmms--gui--CompressorControlDialog lmms--gui--Knob {

plugins/Compressor/CompressorControlDialog.cpp

@@ -45,26 +45,12 @@ namespace lmms::gui
 
 CompressorControlDialog::CompressorControlDialog(CompressorControls* controls) :
 	EffectControlDialog(controls),
-	m_controls(controls),
-	m_inVolAreaColor(209, 216, 228, 17),
-	m_inVolColor(209, 216, 228, 100),
-	m_outVolAreaColor(209, 216, 228, 30),
-	m_outVolColor(209, 216, 228, 240),
-	m_gainReductionColor(180, 100, 100, 210),
-	m_kneeColor(39, 171, 95, 255),
-	m_kneeColor2(9, 171, 160, 255),
-	m_threshColor(39, 171, 95, 100),
-	m_textColor(209, 216, 228, 50),
-	m_graphColor(209, 216, 228, 50),
-	m_resetColor(200, 100, 15, 200)
+	m_controls(controls)
 {
 	setAutoFillBackground(false);
 	setAttribute(Qt::WA_OpaquePaintEvent, true);
 	setAttribute(Qt::WA_NoSystemBackground, true);
 	
-	QPalette pal;
-	pal.setBrush(backgroundRole(), PLUGIN_NAME::getIconPixmap("artwork"));
-	setPalette(pal);
 	setMinimumSize(MIN_COMP_SCREEN_X, MIN_COMP_SCREEN_Y);
 	resize(COMP_SCREEN_X, COMP_SCREEN_Y);
 
@@ -615,7 +601,7 @@ void CompressorControlDialog::paintEvent(QPaintEvent *event)
 	m_p.begin(this);
 
 	m_p.setCompositionMode(QPainter::CompositionMode_Source);
-	m_p.fillRect(0, 0, m_windowSizeX, m_windowSizeY, QColor("transparent"));
+	m_p.fillRect(0, 0, m_windowSizeX, m_windowSizeY, m_backgroundColor);
 	m_p.setCompositionMode(QPainter::CompositionMode_SourceOver);
 
 	m_p.drawPixmap(0, 0, m_graphPixmap);
@@ -683,7 +669,7 @@ void CompressorControlDialog::drawGraph()
 
 	// Redraw graph
 	m_p.setPen(QPen(m_graphColor, 1));
-	for (int i = 1; i < m_dbRange / COMP_GRID_SPACING + 1; ++i)
+	for (int i = 0; i < m_dbRange / COMP_GRID_SPACING + 1; ++i)
 	{
 		m_p.drawLine(0, dbfsToYPoint(-COMP_GRID_SPACING * i), m_windowSizeX, dbfsToYPoint(-COMP_GRID_SPACING * i));
 		m_p.drawLine(dbfsToXPoint(-COMP_GRID_SPACING * i), 0, dbfsToXPoint(-COMP_GRID_SPACING * i), m_kneeWindowSizeY);

plugins/Compressor/CompressorControlDialog.h

@@ -86,6 +86,7 @@ public:
 	Q_PROPERTY(QColor textColor MEMBER m_textColor)
 	Q_PROPERTY(QColor graphColor MEMBER m_graphColor)
 	Q_PROPERTY(QColor resetColor MEMBER m_resetColor)
+	Q_PROPERTY(QColor backgroundColor MEMBER m_backgroundColor)
 
 protected:
 	void resizeEvent(QResizeEvent *event) override;
@@ -150,6 +151,7 @@ private:
 	QColor m_textColor = QColor(209, 216, 228, 50);
 	QColor m_graphColor = QColor(209, 216, 228, 50);
 	QColor m_resetColor = QColor(200, 100, 15, 200);
+	QColor m_backgroundColor = QColor(7, 8, 9, 255);
 
 	float m_peakAvg;
 	float m_gainAvg;