Added button to change the brightess of the spectrum display grid

Readme.md

@@ -78,12 +78,12 @@ Done since the fork
   - SSB bandwidth can now be tuned in steps of 100 Hz
   - NFM and SSB receiver in focus trigger the display of the central frequency line on the spectrum frequency scale thus facilitating its identification
   - Added AM demod so now you can listen to air traffic!
+  - Added the possibility to change the brightness and/or color of the grid. 
     
 =====
 To Do
 =====
 
-  - Add the possibility to change the brightness and/or color of the grid. Sometimes it is barely visible yet useful
   - Fix and possibly enhance (stereo, RDS?) WFM. Maybe into two plugins one for plain WFM and the other for Broadcast FM
   - Make the the SSB filter frequency bounds tunable so that it can be used for CW. Change marker overlay accordingly.
   - Possibility to completely undock the receiver in a separate window. Useful when there are many receivers

include-gpl/gui/glspectrum.h

@@ -43,6 +43,7 @@ public:
 	void setDisplayMaxHold(bool display);
 	void setDisplayHistogram(bool display);
 	void setDisplayGrid(bool display);
+	void setDisplayGridIntensity(int intensity);
 
 	void addChannelMarker(ChannelMarker* channelMarker);
 	void removeChannelMarker(ChannelMarker* channelMarker);
@@ -87,6 +88,7 @@ private:
 	int m_fftSize;
 
 	bool m_displayGrid;
+	int m_displayGridIntensity;
 	bool m_invertedWaterfall;
 
 	std::vector<Real> m_maxHold;

include-gpl/gui/glspectrumgui.h

@@ -39,6 +39,7 @@ private:
 	Real m_refLevel;
 	Real m_powerRange;
 	int m_decay;
+	int m_displayGridIntensity;
 	bool m_displayWaterfall;
 	bool m_invertedWaterfall;
 	bool m_displayMaxHold;
@@ -54,6 +55,7 @@ private slots:
 	void on_refLevel_currentIndexChanged(int index);
 	void on_levelRange_currentIndexChanged(int index);
 	void on_decay_currentIndexChanged(int index);
+	void on_gridIntensity_valueChanged(int index);
 
 	void on_waterfall_toggled(bool checked);
 	void on_histogram_toggled(bool checked);

sdrbase/gui/glspectrum.cpp

@@ -33,6 +33,7 @@ GLSpectrum::GLSpectrum(QWidget* parent) :
 	m_sampleRate(500000),
 	m_fftSize(512),
 	m_displayGrid(true),
+	m_displayGridIntensity(5),
 	m_invertedWaterfall(false),
 	m_displayMaxHold(false),
 	m_leftMarginTextureAllocated(false),
@@ -217,6 +218,15 @@ void GLSpectrum::setDisplayGrid(bool display)
 	update();
 }
 
+void GLSpectrum::setDisplayGridIntensity(int intensity)
+{
+	m_displayGridIntensity = intensity;
+	if (m_displayGridIntensity > 100) {
+		m_displayGridIntensity = 100;
+	}
+	update();
+}
+
 void GLSpectrum::addChannelMarker(ChannelMarker* channelMarker)
 {
 	QMutexLocker mutexLocker(&m_mutex);
@@ -727,7 +737,8 @@ void GLSpectrum::paintGL()
 		glEnable(GL_BLEND);
 		glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 		glLineWidth(1.0f);
-		glColor4f(1, 1, 1, 0.05f);
+		//glColor4f(1, 1, 1, 0.05f);
+		glColor4f(1, 1, 1, m_displayGridIntensity / 100.0);
 
 		glPushMatrix();
 		glTranslatef(m_glWaterfallRect.x(), m_glWaterfallRect.y(), 0);
@@ -772,7 +783,7 @@ void GLSpectrum::paintGL()
 		glEnable(GL_BLEND);
 		glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 		glLineWidth(1.0f);
-		glColor4f(1, 1, 1, 0.05f);
+		glColor4f(1, 1, 1, m_displayGridIntensity / 100.0);
 
 		glPushMatrix();
 		glTranslatef(m_glHistogramRect.x(), m_glHistogramRect.y(), 0);

sdrbase/gui/glspectrumgui.cpp

@@ -17,6 +17,7 @@ GLSpectrumGUI::GLSpectrumGUI(QWidget* parent) :
 	m_refLevel(0),
 	m_powerRange(100),
 	m_decay(0),
+	m_displayGridIntensity(1),
 	m_displayWaterfall(true),
 	m_invertedWaterfall(false),
 	m_displayMaxHold(false),
@@ -52,6 +53,7 @@ void GLSpectrumGUI::resetToDefaults()
 	m_refLevel = 0;
 	m_powerRange = 100;
 	m_decay = 0;
+	m_displayGridIntensity = 5,
 	m_displayWaterfall = true;
 	m_invertedWaterfall = false;
 	m_displayMaxHold = false;
@@ -74,6 +76,7 @@ QByteArray GLSpectrumGUI::serialize() const
 	s.writeBool(8, m_displayMaxHold);
 	s.writeBool(9, m_displayHistogram);
 	s.writeS32(10, m_decay);
+	s.writeS32(13, m_displayGridIntensity);
 	s.writeBool(11, m_displayGrid);
 	s.writeBool(12, m_invert);
 	return s.final();
@@ -99,6 +102,7 @@ bool GLSpectrumGUI::deserialize(const QByteArray& data)
 		d.readBool(8, &m_displayMaxHold, false);
 		d.readBool(9, &m_displayHistogram, false);
 		d.readS32(10, &m_decay, 0);
+		d.readS32(13, &m_displayGridIntensity, 0);
 		d.readBool(11, &m_displayGrid, false);
 		d.readBool(12, &m_invert, true);
 		applySettings();
@@ -126,6 +130,7 @@ void GLSpectrumGUI::applySettings()
 	ui->histogram->setChecked(m_displayHistogram);
 	ui->invert->setChecked(m_invert);
 	ui->grid->setChecked(m_displayGrid);
+	ui->gridIntensity->setSliderPosition(m_displayGridIntensity);
 
 	m_glSpectrum->setDisplayWaterfall(m_displayWaterfall);
 	m_glSpectrum->setInvertedWaterfall(m_invertedWaterfall);
@@ -134,6 +139,7 @@ void GLSpectrumGUI::applySettings()
 	m_glSpectrum->setDecay(m_decay);
 	m_glSpectrum->setInvertedWaterfall(m_invert);
 	m_glSpectrum->setDisplayGrid(m_displayGrid);
+	m_glSpectrum->setDisplayGridIntensity(m_displayGridIntensity);
 
 	m_spectrumVis->configure(m_messageQueue, m_fftSize, m_fftOverlap, (FFTWindow::Function)m_fftWindow);
 }
@@ -208,3 +214,10 @@ void GLSpectrumGUI::on_grid_toggled(bool checked)
 	if(m_glSpectrum != NULL)
 		m_glSpectrum->setDisplayGrid(m_displayGrid);
 }
+
+void GLSpectrumGUI::on_gridIntensity_valueChanged(int index)
+{
+	m_displayGridIntensity = index;
+	if(m_glSpectrum != NULL)
+		m_glSpectrum->setDisplayGridIntensity(m_displayGridIntensity);
+}

sdrbase/gui/glspectrumgui.ui

@@ -457,13 +457,13 @@
         <string>Grid intensity</string>
        </property>
        <property name="maximum">
-        <number>255</number>
+        <number>100</number>
        </property>
        <property name="pageStep">
-        <number>16</number>
+        <number>1</number>
        </property>
        <property name="value">
-        <number>64</number>
+        <number>5</number>
        </property>
       </widget>
      </item>