- OpieScreenSaver now uses the calibration data for the light sensor

2 files changed, 48 insertions, 2 deletions

diff --git a/core/launcher/screensaver.cpp b/core/launcher/screensaver.cpp
index 9e823ff..741591e 100644
--- a/core/launcher/screensaver.cpp
+++ b/core/launcher/screensaver.cpp
@@ -1,53 +1,55 @@
 
 #include "screensaver.h"
 
 #include <qpe/config.h>
 #include <qpe/power.h>
 #include <qpe/network.h>
 
 #include <opie/odevice.h>
 
 
 using namespace Opie;
 
 
+
 OpieScreenSaver::OpieScreenSaver ( )
                 : QObject ( 0, "screensaver" ), QWSScreenSaver ( )
 {
         m_disable_suspend = 100;
         m_enable_dim = false;
         m_enable_lightoff = false;
         m_enable_suspend = false;
         m_onlylcdoff = false;
 
         m_enable_dim_ac = false;
         m_enable_lightoff_ac = false;
         m_enable_suspend_ac = false;
         m_onlylcdoff_ac = false;
 
         m_use_light_sensor = false;
         m_backlight_sensor = -1;
+        ::memset ( m_sensordata, 0xff, LS_Count * sizeof( m_sensordata [0] ));
 
         m_lcd_status = true;
 
         m_backlight_normal = -1;
         m_backlight_current = -1;
         m_backlight_forcedoff = false;
 
         m_on_ac = false;
 
         m_level = -1;
 
         // Make sure the LCD is in fact on, (if opie was killed while the LCD is off it would still be off)
         ODevice::inst ( )-> setDisplayStatus ( true );
         setBacklight ( -1 );
 }
 
 
 void OpieScreenSaver::restore()
 {
         m_level = -1;
 
         if ( !m_lcd_status ) {    // We must have turned it off
                 ODevice::inst ( ) -> setDisplayStatus ( true );
                 m_lcd_status = true;
@@ -152,83 +154,114 @@ void OpieScreenSaver::setInterval ( int interval )
 }
 
 
 void OpieScreenSaver::setMode ( int mode )
 {
         if ( mode > m_disable_suspend )
                 setInterval ( -1 );
         m_disable_suspend = mode;
 }
 
 
 void OpieScreenSaver::setBacklight ( int bright )
 {
         // Read from config
         Config config ( "apm" );
         config. setGroup ( m_on_ac ? "AC" : "Battery" );
         m_backlight_normal = config. readNumEntry ( "Brightness", 255 );
 
         m_use_light_sensor = config. readBoolEntry ( "LightSensor", false );
 
         qDebug ( "setBacklight: %d (ls: %d)", m_backlight_normal, m_use_light_sensor ? 1 : 0 );
 
         killTimers ( );
         if ( m_use_light_sensor ) {
+                QStringList sl = config. readListEntry ( "LightSensorData", ';' );
+                
+                m_sensordata [LS_SensorMin] = 40;
+                m_sensordata [LS_SensorMax] = 215;
+                m_sensordata [LS_LightMin] = 1;
+                m_sensordata [LS_LightMax] = 255;
+                m_sensordata [LS_Steps] = 12;
+                        m_sensordata [LS_Interval] = 2000;      
+                
+                for ( uint i = 0; i < LS_Count; i++ ) {
+                        if ( i < sl. count ( ))
+                                m_sensordata [i] = sl [i]. toInt ( );
+                }
+
                 timerEvent ( 0 );
-                startTimer ( 2000 );
+                startTimer ( m_sensordata [LS_Interval] );
         }
 
         setBacklightInternal ( bright );
 }
 
 
 void OpieScreenSaver::setBacklightInternal ( int bright )
 {
         if ( bright == -3 ) {
                 // Forced on
                 m_backlight_forcedoff = false;
                 bright = -1;
         }
         if ( m_backlight_forcedoff && bright != -2 )
                 return ;
         if ( bright == -2 ) {
                 // Toggle between off and on
                 bright = m_backlight_current ? 0 : -1;
                 m_backlight_forcedoff = !bright;
         }
         if ( bright == -1 )
                 bright = m_use_light_sensor ? m_backlight_sensor : m_backlight_normal;
 
         if ( bright != m_backlight_current ) {
                 ODevice::inst ( )-> setDisplayBrightness ( bright );
                 m_backlight_current = bright;
         }
 }
 
 
 void OpieScreenSaver::timerEvent ( QTimerEvent * )
 {
-        m_backlight_sensor = (( 255 - ODevice::inst ( )-> readLightSensor ( )) * m_backlight_normal ) / 255;
+        int s = ODevice::inst ( )-> readLightSensor ( );
+        
+        if ( s < m_sensordata [LS_SensorMin] )
+                m_backlight_sensor = m_sensordata [LS_LightMax];
+        else if ( s >= m_sensordata [LS_SensorMax] )
+                m_backlight_sensor = m_sensordata [LS_LightMin];
+        else {
+                int dx = m_sensordata [LS_SensorMax] - m_sensordata [LS_SensorMin];
+                int dy = m_sensordata [LS_LightMax] - m_sensordata [LS_LightMin];
+                
+                int stepno = ( s - m_sensordata [LS_SensorMin] ) * m_sensordata [LS_Steps] / dx;
+                
+                m_backlight_sensor = m_sensordata [LS_LightMax] - dy * stepno / ( m_sensordata [LS_Steps] - 1 );
+        }
+        if ( !m_backlight_sensor )
+                m_backlight_sensor = 1;
+
+        // qDebug ( "f(%d) = %d [%d - %d] -> [%d - %d] / %d", s, m_backlight_sensor, m_sensordata [LS_SensorMin], m_sensordata [LS_SensorMax], m_sensordata [LS_LightMin], m_sensordata [LS_LightMax], m_sensordata [LS_Steps] );
 
         if ( m_level <= 0 )
                 setBacklightInternal ( -1 );
 }
 
 
 void OpieScreenSaver::setDisplayState ( bool on )
 {
         if ( m_lcd_status != on ) {
                 ODevice::inst ( ) -> setDisplayStatus ( on );
                 m_lcd_status = on;
         }
 }
 
 
 void OpieScreenSaver::powerStatusChanged ( PowerStatus ps )
 {
         bool newonac = ( ps. acStatus ( ) == PowerStatus::Online );
         
         if ( newonac != m_on_ac ) {
                 m_on_ac = newonac;
                 setInterval ( -1 );
                 setBacklight ( -1 );
                         restore ( );    
diff --git a/core/launcher/screensaver.h b/core/launcher/screensaver.h
index 9126f33..da10a8d 100644
--- a/core/launcher/screensaver.h
+++ b/core/launcher/screensaver.h
@@ -26,36 +26,49 @@ public:
 
         void powerStatusChanged ( PowerStatus ps );
 
 private:
         void setBacklightInternal ( int bright );
 
 protected:
         virtual void timerEvent ( QTimerEvent * );
 
 private:
         int m_disable_suspend;
         bool m_enable_dim;
         bool m_enable_lightoff;
         bool m_enable_suspend;
         bool m_onlylcdoff;
 
         bool m_enable_dim_ac;
         bool m_enable_lightoff_ac;
         bool m_enable_suspend_ac;
         bool m_onlylcdoff_ac;
 
         bool m_use_light_sensor;
         int m_backlight_sensor;
 
+        enum {
+                LS_Interval = 0,
+                LS_Steps,
+                LS_SensorMin,
+                LS_SensorMax,
+                LS_LightMin,
+                LS_LightMax,
+        
+                LS_Count
+        };
+
+        int m_sensordata [LS_Count];
+
         bool m_lcd_status;
 
         int m_backlight_normal;
         int m_backlight_current;
         bool m_backlight_forcedoff;
 
         bool m_on_ac;
         
         int m_level;
 };
 
 #endif