- Completly reworked the backlight "preview":

every slider/control that relates to backlight levels, is now switching the
lcd to this level for 2 seconds - after that the backlight switches back to
the standard level (or light sensor control)

- Many bugfixes and usability improvements in light sensor calibration

8 files changed, 164 insertions, 142 deletions

diff --git a/core/settings/light-and-power/calibration.cpp b/core/settings/light-and-power/calibration.cpp
index 6a3360f..aed2bc8 100644
--- a/core/settings/light-and-power/calibration.cpp
+++ b/core/settings/light-and-power/calibration.cpp
@@ -30,10 +30,13 @@
 #include <qpainter.h>
 #include <qpalette.h>
+#include <qpixmap.h>
 
-#define BRD 2
+#define BRD 3
 
 Calibration::Calibration ( QWidget *parent, const char *name, WFlags fl )
-        : QWidget ( parent, name, fl )
+        : QWidget ( parent, name, fl | WRepaintNoErase )
 {
+        setBackgroundMode ( NoBackground );
+        
         m_scale = QSize ( 256, 256 );
         m_steps = 5;
@@ -122,11 +125,19 @@ void Calibration::checkPoints ( )
         int dy = m_scale. height ( );
 
+        if ( m_p [1]. x ( ) < 0 )
+                m_p [1]. setX ( 0 );
         if ( m_p [1]. x ( ) >= dx )
                 m_p [1]. setX ( dx - 1 );
+        if ( m_p [0]. x ( ) < 0 )
+                m_p [0]. setX ( 0 );
         if ( m_p [0]. x ( ) > m_p [1]. x ( ))
                 m_p [0]. setX ( m_p [1]. x ( ));
 
+        if ( m_p [1]. y ( ) < 0 )
+                m_p [1]. setY ( 0 );
         if ( m_p [1]. y ( ) >= dy )
                 m_p [1]. setY ( dy - 1 );
+        if ( m_p [0]. y ( ) < 0 )
+                m_p [0]. setY ( 0 );
         if ( m_p [0]. y ( ) > m_p [1]. y ( ))
                 m_p [0]. setY ( m_p [1]. y ( ));
@@ -134,6 +145,6 @@ void Calibration::checkPoints ( )
 
 
-#define SCALEX(x)   (BRD+x*(width()- 2*BRD)/m_scale.width())
-#define SCALEY(y)   (BRD+y*(height()-2*BRD)/m_scale.height())
+#define SCALEX(x)   (BRD+(x)*(width()- 2*BRD)/m_scale.width())
+#define SCALEY(y)   (BRD+(y)*(height()-2*BRD)/m_scale.height())
 
 
@@ -156,6 +167,6 @@ void Calibration::mousePressEvent ( QMouseEvent *e )
                 y [i] = SCALEY( m_p [i]. y ( ));
 
-                if (( QABS( e-> x ( ) - x [i] ) <= BRD ) &&
-                    ( QABS( e-> y ( ) - y [i] ) <= BRD )) {
+                if (( QABS( e-> x ( ) - x [i] ) <= 2 * BRD ) &&
+                    ( QABS( e-> y ( ) - y [i] ) <= 2 * BRD )) {
                         m_dragged = i;
                         break;
@@ -170,5 +181,5 @@ void Calibration::mousePressEvent ( QMouseEvent *e )
                 if ( m_dragged >= 0 ) 
                                 r |= around ( x [m_dragged], y [m_dragged] );
-                repaint ( r );
+                repaint ( r, false );
                 }
 }
@@ -185,8 +196,16 @@ void Calibration::mouseMoveEvent ( QMouseEvent *e )
         n [1 - m_dragged] = m_p [1 - m_dragged];
         
-        if (( n [0]. x ( ) > n [1]. x ( )) || ( n [m_dragged]. x ( ) < 0 ) || ( n [m_dragged]. x ( ) >= m_scale. width ( )))
-                n [m_dragged]. setX ( m_p [m_dragged]. x ( ));
-        if (( n [0]. y ( ) > n [1]. y ( )) || ( n [m_dragged]. y ( ) < 0 ) || ( n [m_dragged]. y ( ) >= m_scale. height ( )))
-                n [m_dragged]. setY ( m_p [m_dragged]. y ( ));
+        if ( n [m_dragged]. x ( ) < 0 ) 
+                n [m_dragged]. setX ( 0 );
+        if ( n [m_dragged]. x ( ) >= m_scale. width ( ))
+                n [m_dragged]. setX ( m_scale. width ( ) - 1 );
+        if ( n [0]. x ( ) > n [1]. x ( ))
+                n [m_dragged]. setX ( n [1 - m_dragged]. x ( ));
+        if ( n [m_dragged]. y ( ) < 0 ) 
+                n [m_dragged]. setY ( 0 );
+        if ( n [m_dragged]. y ( ) >= m_scale. height ( ))
+                n [m_dragged]. setY ( m_scale. height ( ) - 1 );
+        if ( n [0]. y ( ) > n [1]. y ( ))
+                n [m_dragged]. setY ( n [1 - m_dragged]. y ( ));
                 
                 QRect r;
@@ -207,8 +226,12 @@ void Calibration::mouseMoveEvent ( QMouseEvent *e )
                                 r |= QRect ( 0, ny [0], nx [0] - 0 + 1, 1 );
                                 r |= QRect ( 0, oy [0], ox [0] - 0 + 1, 1 );
+                        
+                                emit startPointChanged ( startPoint ( ));
                         }
                         else if ( i == 1 ) {
                                 r |= QRect ( nx [1], ny [1], width ( ) - nx [1], 1 ); 
                                 r |= QRect ( ox [1], oy [1], width ( ) - ox [1], 1 ); 
+
+                                emit endPointChanged ( endPoint ( ));
                         }
                 }
@@ -218,5 +241,5 @@ void Calibration::mouseMoveEvent ( QMouseEvent *e )
                 r |= QRect ( ox [0], oy [0], ox [1] - ox [0] + 1, oy [1] - oy [0] + 1 );
                 
-                repaint ( r );
+                repaint ( r, false );
         }
 }
@@ -234,12 +257,13 @@ void Calibration::mouseReleaseEvent ( QMouseEvent *e )
         m_dragged = -1;
         
-        repaint ( around ( x, y ));
+        repaint ( around ( x, y ), false );
 }
 
-void Calibration::paintEvent ( QPaintEvent * )
+void Calibration::paintEvent ( QPaintEvent *pe )
 {
-        QPainter p ( this );
-        QColorGroup g = colorGroup ( );
-
+        QPixmap pix ( size ( ));
+        QPainter p ( &pix, this );
+        QRect cr = pe-> rect ( );
+        
         int x0 = SCALEX( m_p [0]. x ( ));
         int y0 = SCALEY( m_p [0]. y ( ));
@@ -250,13 +274,46 @@ void Calibration::paintEvent ( QPaintEvent * )
         int dy = y1 - y0;
         
+        // restrict steps to real x and y resolution
+        int st = QMIN( QMIN( m_steps, ( dx + 1 )), ( dy + 1 ));
+        
+        QString stepstr = tr( "%1 Steps" ). arg ( st );
+        QRect tr = p. boundingRect ( BRD, BRD, width ( ) - 2*BRD, height() - 2*BRD, AlignTop | AlignRight, stepstr );
+        tr. setLeft ( tr. left ( ) - 20 );
+        if ( p. hasClipping ( ))
+                p. setClipRegion ( p. clipRegion ( ) | QRegion ( tr ));
+        
+        QColorGroup g = colorGroup ( );
+
+        p. fillRect ( cr, g. base ( ));
+        p. fillRect ( tr, g. base ( ));
+
         int ex = x0, ey = y0;
         
+        p. setPen ( g. mid ( ));
+        
+        int gx0 = SCALEX( 0 );
+        int gy0 = SCALEY( 0 );
+        int gx1 = SCALEX( m_scale. width ( ) - 1 );
+        int gy1 = SCALEY( m_scale. height ( ) - 1 );
+
+        int xdiv = QMIN( 4, m_scale. width ( ));
+        int ydiv = QMIN( 4, m_scale. height ( ));
+        
+        xdiv = ( gx1 - gx0 + 1 ) / xdiv;
+        ydiv = ( gy1 - gy0 + 1 ) / ydiv;
+        
+        for ( int i = gx0 + xdiv; i <= ( gx1 - xdiv ); i += xdiv )
+                p. drawLine ( i, gy0, i, gy1 );
+        
+        for ( int i = gy0 + ydiv; i <= ( gy1 - ydiv ); i += ydiv )
+                p. drawLine ( gx0, i, gx1, i );
+        
         p. setPen ( g. highlight ( ));
         
         p. drawLine ( BRD, ey, ex, ey );
         
-        for ( int i = 1; i < m_steps; i++ ) {
-                int fx = x0 + dx * i / m_steps;
-                int fy = y0 + dy * i / ( m_steps - 1 );
+        for ( int i = 1; i < st; i++ ) {
+                int fx = x0 + dx * i / st;
+                int fy = y0 + dy * i / ( st - 1 );
                 
                 p. drawLine ( ex, ey, fx, ey );
@@ -266,12 +323,24 @@ void Calibration::paintEvent ( QPaintEvent * )
                 ey = fy;
                 }
+        if ( st == 1 ) {
+                p. drawLine ( ex, ey, ex, y1 );
+                ey = y1;
+        }
         
         p. drawLine ( ex, ey, width ( ) - 1 - BRD, ey );
         
+        
         p. fillRect ( around ( x0, y0 ), m_dragged == 0 ? g. highlightedText ( ) : g. text ( ));
+        p. drawRect ( around ( x0, y0 ));
         p. fillRect ( around ( x1, y1 ), m_dragged == 1 ? g. highlightedText ( ) : g. text ( ));
+        p. drawRect ( around ( x1, y1 ));
         
         p. setPen ( g. text ( ));
-        p. drawText ( QRect ( BRD, BRD, width ( ) - 2*BRD, height() - 2*BRD ), AlignTop | AlignRight, tr( "%1 Steps" ). arg ( m_steps ));
+        p. drawText ( tr, AlignTop | AlignRight, stepstr );
+        
+        p. end ( );
+        bitBlt ( this, cr. topLeft ( ), &pix, cr ); 
+        if ( !cr. contains ( tr ))
+                        bitBlt ( this, tr. topLeft ( ), &pix, tr );     
 }
 
diff --git a/core/settings/light-and-power/calibration.h b/core/settings/light-and-power/calibration.h
index 2bff69a..ffa63b2 100644
--- a/core/settings/light-and-power/calibration.h
+++ b/core/settings/light-and-power/calibration.h
@@ -44,4 +44,8 @@ public:
                 QPoint endPoint ( ) const;
 
+signals:
+        void startPointChanged ( const QPoint & );
+        void endPointChanged ( const QPoint & );
+
 public slots:
         void setScale ( const QSize &s );
diff --git a/core/settings/light-and-power/light-and-power.pro b/core/settings/light-and-power/light-and-power.pro
index c89a26d..80c6631 100644
--- a/core/settings/light-and-power/light-and-power.pro
+++ b/core/settings/light-and-power/light-and-power.pro
@@ -1,6 +1,6 @@
         TEMPLATE= app
-        CONFIG  += qt warn_on release
+        CONFIG  += qt warn_on debug
         DESTDIR         = $(OPIEDIR)/bin
-        HEADERS         = settings.h sensor.h calibration.h
+        HEADERS         = light.h sensor.h calibration.h
         SOURCES         = light.cpp main.cpp sensor.cpp calibration.cpp
         INTERFACES= lightsettingsbase.ui sensorbase.ui
diff --git a/core/settings/light-and-power/light.cpp b/core/settings/light-and-power/light.cpp
index c0ba60b..21377b7 100644
--- a/core/settings/light-and-power/light.cpp
+++ b/core/settings/light-and-power/light.cpp
@@ -27,5 +27,5 @@
 */
 
-#include "settings.h"
+#include "light.h"
 
 #include <qpe/config.h>
@@ -39,4 +39,5 @@
 #include <qtabwidget.h>
 #include <qslider.h>
+#include <qtimer.h>
 #include <qspinbox.h>
 #include <qpushbutton.h>
@@ -49,5 +50,5 @@ using namespace Opie;
 
 LightSettings::LightSettings( QWidget* parent,  const char* name, WFlags )
-        : LightSettingsBase( parent, name, true, WStyle_ContextHelp )
+        : LightSettingsBase( parent, name, false, WStyle_ContextHelp )
 {
         m_res = ODevice::inst ( )-> displayBrightnessResolution ( );
@@ -64,6 +65,6 @@ LightSettings::LightSettings( QWidget* parent,  const char* name, WFlags )
 
         // battery spinboxes
-        interval_dim->      setValue ( config. readNumEntry ( "Dim", 20 ));
-        interval_lightoff-> setValue ( config. readNumEntry ( "LightOff", 30 ));
+        interval_dim->      setValue ( config. readNumEntry ( "Dim", 30 ));
+        interval_lightoff-> setValue ( config. readNumEntry ( "LightOff", 20 ));
         interval_suspend->  setValue ( config. readNumEntry ( "Suspend", 60 ));
 
@@ -71,5 +72,5 @@ LightSettings::LightSettings( QWidget* parent,  const char* name, WFlags )
         LcdOffOnly-> setChecked ( config. readBoolEntry ( "LcdOffOnly", false ));
 
-        int bright = config. readNumEntry ( "Brightness", 255 );
+        int bright = config. readNumEntry ( "Brightness", 127 );
         brightness-> setMaxValue ( m_res - 1 );
         brightness-> setTickInterval ( QMAX( 1, m_res / 16 ));
@@ -85,7 +86,7 @@ LightSettings::LightSettings( QWidget* parent,  const char* name, WFlags )
         
         // ac spinboxes
-        interval_dim_ac_3->      setValue ( config. readNumEntry ( "Dim", 20 ));
-        interval_lightoff_ac_3-> setValue ( config. readNumEntry ( "LightOff", 30 ));
-        interval_suspend_ac_3->  setValue ( config. readNumEntry ( "Suspend", 60 ));
+        interval_dim_ac_3->      setValue ( config. readNumEntry ( "Dim", 60 ));
+        interval_lightoff_ac_3-> setValue ( config. readNumEntry ( "LightOff", 120 ));
+        interval_suspend_ac_3->  setValue ( config. readNumEntry ( "Suspend", 0 ));
 
         // ac check and slider
@@ -109,12 +110,16 @@ LightSettings::LightSettings( QWidget* parent,  const char* name, WFlags )
         criticalSpinBox-> setValue ( config. readNumEntry ( "powercritical", 5 ) );
 
+        m_resettimer = new QTimer ( this );
+        connect ( m_resettimer, SIGNAL( timeout ( )), this, SLOT( resetBacklight ( )));
+
         if ( PowerStatusManager::readStatus ( ). acStatus ( ) != PowerStatus::Online ) {
-                connect ( brightness, SIGNAL( valueChanged ( int )), this, SLOT( setBacklight ( int )));
                         tabs-> setCurrentPage ( 0 );    
         }
         else {
-                connect ( brightness_ac_3, SIGNAL( valueChanged ( int )), this, SLOT( setBacklight ( int )));
                 tabs-> setCurrentPage ( 1 );
         }
+        
+        connect ( brightness, SIGNAL( valueChanged ( int )), this, SLOT( setBacklight ( int )));
+        connect ( brightness_ac_3, SIGNAL( valueChanged ( int )), this, SLOT( setBacklight ( int )));
 }
 
@@ -123,8 +128,8 @@ LightSettings::~LightSettings ( )
 }
 
-
 void LightSettings::calibrateSensor ( )
 {
         Sensor *s = new Sensor ( m_sensordata, this );
+        connect ( s, SIGNAL( viewBacklight ( int )), this, SLOT( setBacklight ( int )));
         s-> showMaximized ( );
         s-> exec ( );
@@ -135,4 +140,5 @@ void LightSettings::calibrateSensorAC ( )
 {
         Sensor *s = new Sensor ( m_sensordata_ac, this );
+        connect ( s, SIGNAL( viewBacklight ( int )), this, SLOT( setBacklight ( int )));
         s-> showMaximized ( );
         s-> exec ( );
@@ -142,16 +148,19 @@ void LightSettings::calibrateSensorAC ( )
 void LightSettings::setBacklight ( int bright )
 {
-        bright = bright * 255 / ( m_res - 1 );
+        if ( bright >= 0 )
+                bright = bright * 255 / ( m_res - 1 );
+        
         QCopEnvelope e ( "QPE/System", "setBacklight(int)" );
         e << bright;
+        
+        if ( bright != -1 ) {
+                m_resettimer-> stop ( );
+                m_resettimer-> start ( 2000, true );
+                }
 }
 
-void LightSettings::reject ( )
+void LightSettings::resetBacklight ( )
 {
-        {
-                QCopEnvelope e ( "QPE/System", "setBacklight(int)" );
-                e << -1;
-        }
-        QDialog::reject ( );
+        setBacklight ( -1 );
 }
 
@@ -201,15 +210,13 @@ void LightSettings::accept ( )
                 e << -1;
         }
-        {
-                QCopEnvelope e ( "QPE/System", "setBacklight(int)" );
-                e << -1;
-        }
-        
-        QDialog::accept ( );
+        LightSettingsBase::accept ( );
 }
 
 void LightSettings::done ( int r )
 {
-        QDialog::done ( r );
+        m_resettimer-> stop ( );
+        resetBacklight ( );
+        
+        LightSettingsBase::done ( r );
         close ( );
 }
diff --git a/core/settings/light-and-power/lightsettingsbase.ui b/core/settings/light-and-power/lightsettingsbase.ui
index 04c6726..309b95d 100644
--- a/core/settings/light-and-power/lightsettingsbase.ui
+++ b/core/settings/light-and-power/lightsettingsbase.ui
@@ -12,5 +12,5 @@
             <x>0</x>
             <y>0</y>
-            <width>379</width>
+            <width>371</width>
             <height>532</height>
         </rect>
@@ -1190,88 +1190,4 @@
 <connections>
     <connection>
-        <sender>auto_brightness</sender>
-        <signal>toggled(bool)</signal>
-        <receiver>brightness</receiver>
-        <slot>setDisabled(bool)</slot>
-    </connection>
-    <connection>
-        <sender>auto_brightness_ac_3</sender>
-        <signal>toggled(bool)</signal>
-        <receiver>brightness_ac_3</receiver>
-        <slot>setDisabled(bool)</slot>
-    </connection>
-    <connection>
-        <sender>auto_brightness_ac_3</sender>
-        <signal>toggled(bool)</signal>
-        <receiver>TextLabel1_3_2</receiver>
-        <slot>setDisabled(bool)</slot>
-    </connection>
-    <connection>
-        <sender>auto_brightness</sender>
-        <signal>toggled(bool)</signal>
-        <receiver>TextLabel1_3</receiver>
-        <slot>setDisabled(bool)</slot>
-    </connection>
-    <connection>
-        <sender>auto_brightness</sender>
-        <signal>toggled(bool)</signal>
-        <receiver>interval_dim</receiver>
-        <slot>setDisabled(bool)</slot>
-    </connection>
-    <connection>
-        <sender>auto_brightness_ac_3</sender>
-        <signal>toggled(bool)</signal>
-        <receiver>interval_dim_ac_3</receiver>
-        <slot>setDisabled(bool)</slot>
-    </connection>
-    <connection>
-        <sender>auto_brightness</sender>
-        <signal>toggled(bool)</signal>
-        <receiver>PixmapLabel2</receiver>
-        <slot>setDisabled(bool)</slot>
-    </connection>
-    <connection>
-        <sender>auto_brightness</sender>
-        <signal>toggled(bool)</signal>
-        <receiver>TextLabel4</receiver>
-        <slot>setDisabled(bool)</slot>
-    </connection>
-    <connection>
-        <sender>auto_brightness</sender>
-        <signal>toggled(bool)</signal>
-        <receiver>TextLabel5</receiver>
-        <slot>setDisabled(bool)</slot>
-    </connection>
-    <connection>
-        <sender>auto_brightness</sender>
-        <signal>toggled(bool)</signal>
-        <receiver>PixmapLabel1</receiver>
-        <slot>setDisabled(bool)</slot>
-    </connection>
-    <connection>
-        <sender>auto_brightness_ac_3</sender>
-        <signal>toggled(bool)</signal>
-        <receiver>PixmapLabel2_2_3</receiver>
-        <slot>setDisabled(bool)</slot>
-    </connection>
-    <connection>
-        <sender>auto_brightness_ac_3</sender>
-        <signal>toggled(bool)</signal>
-        <receiver>TextLabel6</receiver>
-        <slot>setDisabled(bool)</slot>
-    </connection>
-    <connection>
-        <sender>auto_brightness_ac_3</sender>
-        <signal>toggled(bool)</signal>
-        <receiver>TextLabel7</receiver>
-        <slot>setDisabled(bool)</slot>
-    </connection>
-    <connection>
-        <sender>auto_brightness_ac_3</sender>
-        <signal>toggled(bool)</signal>
-        <receiver>PixmapLabel1_2_3</receiver>
-        <slot>setDisabled(bool)</slot>
-    </connection>
-    <connection>
         <sender>CalibrateLightSensor</sender>
         <signal>clicked()</signal>
diff --git a/core/settings/light-and-power/main.cpp b/core/settings/light-and-power/main.cpp
index 051fdec..ecacf69 100644
--- a/core/settings/light-and-power/main.cpp
+++ b/core/settings/light-and-power/main.cpp
@@ -19,5 +19,5 @@
 **********************************************************************/
 
-#include "settings.h"
+#include "light.h"
 
 #include <qpe/qpeapplication.h>
diff --git a/core/settings/light-and-power/sensor.cpp b/core/settings/light-and-power/sensor.cpp
index c1df04d..5ca54d4 100644
--- a/core/settings/light-and-power/sensor.cpp
+++ b/core/settings/light-and-power/sensor.cpp
@@ -31,4 +31,8 @@
 #include <qspinbox.h>
 
+#include <opie/odevice.h>
+
+using namespace Opie;
+
 #include "calibration.h"
 #include "sensor.h"
@@ -53,15 +57,18 @@ Sensor::Sensor ( QStringList &params, QWidget *parent, const char *name )
                 case 1: inter = params [0]. toInt ( ) / 1000;
         }
+
+        int xscale = ODevice::inst ( )-> lightSensorResolution ( );
+        int yscale = ODevice::inst ( )-> displayBrightnessResolution ( );
         
         QVBoxLayout *lay = new QVBoxLayout ( frame );
         lay-> setMargin ( 2 );
         m_calib = new Calibration ( frame );
-        lay-> add ( m_calib );
+                lay-> add ( m_calib );
 
-        m_calib-> setScale ( QSize ( 256, 256 ));
+        m_calib-> setScale ( QSize ( xscale, yscale ));
         m_calib-> setLineSteps ( steps );
         m_calib-> setInterval ( inter );
-        m_calib-> setStartPoint ( QPoint ( smin, lmax ));
-        m_calib-> setEndPoint ( QPoint ( smax, lmin ));
+        m_calib-> setStartPoint ( QPoint ( smin * xscale / 256, lmax * yscale / 256 ));
+        m_calib-> setEndPoint ( QPoint ( smax * xscale / 256, lmin * yscale / 256 ));
         
         interval-> setValue ( inter );
@@ -70,16 +77,27 @@ Sensor::Sensor ( QStringList &params, QWidget *parent, const char *name )
         connect ( interval, SIGNAL( valueChanged ( int )), m_calib, SLOT( setInterval ( int )));
         connect ( linesteps, SIGNAL( valueChanged ( int )), m_calib, SLOT( setLineSteps ( int )));
+        
+        connect ( m_calib, SIGNAL( startPointChanged ( const QPoint & )), this, SLOT( pointDrag ( const QPoint & )));
+        connect ( m_calib, SIGNAL( endPointChanged ( const QPoint & )), this, SLOT( pointDrag ( const QPoint & )));
 }                
 
 void Sensor::accept ( )
 {
+        int xscale = ODevice::inst ( )-> lightSensorResolution ( );
+        int yscale = ODevice::inst ( )-> displayBrightnessResolution ( );
+
         m_params. clear ( );
         m_params << QString::number ( m_calib-> interval ( ) * 1000 )
                  << QString::number ( m_calib-> lineSteps ( ))
-                 << QString::number ( m_calib-> startPoint ( ). x ( ))
-                 << QString::number ( m_calib-> endPoint ( ). x ( ))
-                 << QString::number ( m_calib-> endPoint ( ). y ( ))
-                 << QString::number ( m_calib-> startPoint ( ). y ( ));
+                 << QString::number ( m_calib-> startPoint ( ). x ( ) * 256 / xscale )
+                 << QString::number ( m_calib-> endPoint ( ). x ( ) * 256 / xscale )
+                 << QString::number ( m_calib-> endPoint ( ). y ( ) * 256 / yscale )
+                 << QString::number ( m_calib-> startPoint ( ). y ( ) * 256 / yscale );
 
         QDialog::accept ( );
 }
+
+void Sensor::pointDrag ( const QPoint &p )
+{
+        emit viewBacklight ( p. y ( ));
+}
diff --git a/core/settings/light-and-power/sensor.h b/core/settings/light-and-power/sensor.h
index 7a26d81..b484519 100644
--- a/core/settings/light-and-power/sensor.h
+++ b/core/settings/light-and-power/sensor.h
@@ -35,8 +35,16 @@ class QStringList;
 
 class Sensor : public SensorBase {
+        Q_OBJECT
+
 public:
         Sensor ( QStringList &params, QWidget *parent = 0, const char *name = 0 );
         
         virtual void accept ( );
+
+signals:
+        void viewBacklight ( int );
+
+private slots:
+        void pointDrag ( const QPoint & );
         
 private: