From ee0f6ccd10687be68f7f72f1832be327a2078aef Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Thorsten=20M=C3=BCller?=
 <thorsten.muller.ger@googlemail.com>
Date: Thu, 23 Jun 2011 10:14:07 +0200
Subject: [PATCH] Add tooltips to fxmixer faders

Added tooltips to show the actual value when moving the fader handle.
This works mostly like the same feature we already have for the volume
knobs. Depending on settings the value is shown in a range between
0% to 200% or -inf/-34dBV to 6.02 dBV. Again that's the same as for the
volume knob. Value range could be adjusted easily if necessary.

Closes #3305914.

Signed-off-by: Tobias Doerffel <tobias.doerffel@gmail.com>
---
 include/fader.h           | 15 +++++++++++++++
 src/gui/widgets/fader.cpp | 33 +++++++++++++++++++++++++++++++++
 2 files changed, 48 insertions(+)

diff --git a/include/fader.h b/include/fader.h
index f627e17b9..edb76430d 100644
--- a/include/fader.h
+++ b/include/fader.h
@@ -53,6 +53,8 @@
 
 #include "AutomatableModelView.h"
 
+class textFloat;
+
 
 class fader : public QWidget, public FloatModelView
 {
@@ -75,9 +77,18 @@ private:
 	virtual void contextMenuEvent( QContextMenuEvent * _me );
 	virtual void mousePressEvent( QMouseEvent *ev );
 	virtual void mouseMoveEvent( QMouseEvent *ev );
+	virtual void mouseReleaseEvent( QMouseEvent * _me );
 	virtual void wheelEvent( QWheelEvent *ev );
 	virtual void paintEvent( QPaintEvent *ev );
 
+	inline uint knob_y() const
+	{
+		float fRange = m_model->maxValue() - m_model->minValue();
+		float realVal = m_model->value() - m_model->minValue();
+//		uint knob_y = (uint)( 116.0 - ( 86.0 * ( m_model->value() / fRange ) ) );
+		return (uint)( 116.0 - ( 86.0 * ( realVal / fRange ) ) );
+	}
+
 	FloatModel * m_model;
 
 	float m_fPeakValue_L;
@@ -88,6 +99,10 @@ private:
 	QPixmap m_back;
 	QPixmap m_leds;
 	QPixmap m_knob;
+
+	static textFloat * s_textFloat;
+	void updateTextFloat();
+
 } ;
 
 
diff --git a/src/gui/widgets/fader.cpp b/src/gui/widgets/fader.cpp
index cee9cc5e0..17403a41e 100644
--- a/src/gui/widgets/fader.cpp
+++ b/src/gui/widgets/fader.cpp
@@ -53,9 +53,13 @@
 #include "embed.h"
 #include "engine.h"
 #include "caption_menu.h"
+#include "config_mgr.h"
+#include "text_float.h"
 #include "MainWindow.h"
 
 
+textFloat * fader::s_textFloat = NULL;
+
 
 fader::fader( FloatModel * _model, const QString & _name, QWidget * _parent ) :
 	QWidget( _parent ),
@@ -69,6 +73,10 @@ fader::fader( FloatModel * _model, const QString & _name, QWidget * _parent ) :
 	m_leds( embed::getIconPixmap( "fader_leds" ) ),
 	m_knob( embed::getIconPixmap( "fader_knob" ) )
 {
+	if( s_textFloat == NULL )
+	{
+		s_textFloat = new textFloat;
+	}
 	setAccessibleName( _name );
 	setAttribute( Qt::WA_OpaquePaintEvent, true );
 	setMinimumSize( 23, 116 );
@@ -105,6 +113,8 @@ void fader::mouseMoveEvent( QMouseEvent *ev )
 	fVal = fVal + m_model->minValue();
 
 	m_model->setValue( fVal );
+
+	updateTextFloat();
 }
 
 
@@ -115,6 +125,9 @@ void fader::mousePressEvent( QMouseEvent * _me )
 	if( _me->button() == Qt::LeftButton &&
 			! ( _me->modifiers() & Qt::ControlModifier ) )
 	{
+		updateTextFloat();
+		s_textFloat->show();
+
 		mouseMoveEvent( _me );
 		_me->accept();
 	}
@@ -126,6 +139,11 @@ void fader::mousePressEvent( QMouseEvent * _me )
 
 
 
+void fader::mouseReleaseEvent( QMouseEvent * _me )
+{
+	s_textFloat->hide();
+}
+
 
 void fader::wheelEvent ( QWheelEvent *ev )
 {
@@ -139,6 +157,8 @@ void fader::wheelEvent ( QWheelEvent *ev )
 	{
 		m_model->incValue( -5 );
 	}
+	updateTextFloat();
+	s_textFloat->setVisibilityTimeOut( 1000 );
 }
 
 
@@ -182,6 +202,19 @@ void fader::setPeak_R( float fPeak )
 	}
 }
 
+void fader::updateTextFloat()
+{
+	if( configManager::inst()->value( "app", "displaydbv" ).toInt() )
+	{
+		s_textFloat->setText( QString("Volume: %1 dBV").
+				arg( 20.0 * log10( model()->value() ), 3, 'f', 2 ) );
+	}
+	else
+	{
+		s_textFloat->setText( QString("Volume: %1 %").arg( m_model->value() * 100 ) );
+	}
+	s_textFloat->moveGlobal( this, QPoint( width() - m_knob.width() - 5, knob_y() - 46 ) );
+}