1 files changed, 278 insertions, 0 deletions

diff --git a/core/settings/light-and-power/calibration.cpp b/core/settings/light-and-power/calibration.cpp
new file mode 100644
index 0000000..307de1f
--- a/dev/null
+++ b/core/settings/light-and-power/calibration.cpp
@@ -0,0 +1,278 @@
+/*
+                             This file is part of the OPIE Project
+               =.            Copyright (c)  2002 Maximilian Reiss <harlekin@handhelds.org>
+             .=l.            Copyright (c)  2002 Robert Griebl <sandman@handhelds.org>
+           .>+-=
+ _;:,     .>    :=|.         This file is free software; you can
+.> <`_,   >  .   <=          redistribute it and/or modify it under
+:`=1 )Y*s>-.--   :           the terms of the GNU General Public
+.="- .-=="i,     .._         License as published by the Free Software
+ - .   .-<_>     .<>         Foundation; either version 2 of the License,
+     ._= =}       :          or (at your option) any later version.
+    .%`+i>       _;_.
+    .i_,=:_.      -<s.       This file is distributed in the hope that
+     +  .  -:.       =       it will be useful, but WITHOUT ANY WARRANTY;
+    : ..    .:,     . . .    without even the implied warranty of
+    =_        +     =;=|`    MERCHANTABILITY or FITNESS FOR A
+  _.=:.       :    :=>`:     PARTICULAR PURPOSE. See the GNU General
+..}^=.=       =       ;      Public License for more details.
+++=   -.     .`     .:       
+ :     =  ...= . :.=-        You should have received a copy of the GNU
+ -.   .:....=;==+<;          General Public License along with this file;
+  -_. . .   )=.  =           see the file COPYING. If not, write to the
+    --        :-=`           Free Software Foundation, Inc.,
+                             59 Temple Place - Suite 330,
+                             Boston, MA 02111-1307, USA.
+
+*/
+#include "calibration.h"
+
+#include <qpainter.h>
+#include <qpalette.h>
+
+#define BRD 2
+
+Calibration::Calibration ( QWidget *parent, const char *name, WFlags fl )
+        : QWidget ( parent, name, fl )
+{
+        m_scale = QSize ( 256, 256 );
+        m_steps = 5;
+        m_dragged = -1;
+        m_interval = 5;
+        
+        m_p [0] = QPoint ( 0, 0 );
+        m_p [1] = QPoint ( 255, 255 );
+}
+
+Calibration::~Calibration ( )
+{
+}
+
+void Calibration::setScale ( const QSize &s )
+{
+        if ( s. width ( ) < 1 || s. height ( ) < 1 )
+                return;
+
+                m_scale = s;
+        checkPoints ( );
+        
+        update ( );
+}
+
+QSize Calibration::scale ( ) const
+{
+        return m_scale;
+}
+
+void Calibration::setLineSteps ( int steps )
+{
+        if ( m_steps < 2 )
+                return;
+
+        m_steps = steps;
+        update ( );
+}
+
+int Calibration::lineSteps ( ) const
+{
+        return m_steps;
+}
+
+void Calibration::setInterval ( int iv )
+{
+        if ( iv < 1 )
+        return;
+
+        m_interval = iv;
+        //update ( );
+}
+
+int Calibration::interval ( ) const
+{
+        return m_interval;
+}
+
+void Calibration::setStartPoint ( const QPoint &p )
+{
+        m_p [0] = p;
+                checkPoints ( );
+        update ( );
+}
+
+QPoint Calibration::startPoint ( ) const
+{
+        return m_p [0];
+}
+
+void Calibration::setEndPoint ( const QPoint &p )
+{
+        m_p [1] = p;
+        checkPoints ( );
+        update ( );
+}
+
+QPoint Calibration::endPoint ( ) const
+{
+        return m_p [1];
+}
+
+void Calibration::checkPoints ( )
+{
+        int dx = m_scale. width ( );
+        int dy = m_scale. height ( );
+
+        if ( m_p [1]. x ( ) >= dx )
+                m_p [1]. setX ( dx - 1 );
+        if ( m_p [0]. x ( ) > m_p [1]. x ( ))
+                m_p [0]. setX ( m_p [1]. x ( ));
+
+        if ( m_p [1]. y ( ) >= dy )
+                m_p [1]. setY ( dy - 1 );
+        if ( m_p [0]. y ( ) > m_p [1]. y ( ))
+                m_p [0]. setY ( m_p [1]. y ( ));
+}
+
+
+#define SCALEX(x)   (BRD+x*(width()- 2*BRD)/m_scale.width())
+#define SCALEY(y)   (BRD+y*(height()-2*BRD)/m_scale.height())
+
+
+static QRect around ( int x, int y )
+{
+                return QRect ( x - BRD, y - BRD, 2 * BRD + 1, 2 * BRD + 1 );
+}
+
+void Calibration::mousePressEvent ( QMouseEvent *e )
+{
+        if ( e-> button ( ) != LeftButton )
+                return QWidget::mousePressEvent ( e );
+
+        int olddragged = m_dragged;
+        int x [2], y [2];
+
+        m_dragged = -1;
+        for ( int i = 0; i < 2; i++ ) {
+                x [i] = SCALEX( m_p [i]. x ( ));
+                y [i] = SCALEY( m_p [i]. y ( ));
+
+                if (( QABS( e-> x ( ) - x [i] ) <= BRD ) &&
+                    ( QABS( e-> y ( ) - y [i] ) <= BRD )) {
+                        m_dragged = i;
+                        break;
+                }
+        }
+
+        if ( m_dragged != olddragged ) {
+                QRect r;
+        
+                if ( olddragged >= 0 )
+                                r |= around ( x [olddragged], y [olddragged] );
+                if ( m_dragged >= 0 ) 
+                                r |= around ( x [m_dragged], y [m_dragged] );
+                repaint ( r );
+                }
+}
+
+void Calibration::mouseMoveEvent ( QMouseEvent *e )
+{
+        if ( m_dragged < 0 )
+                return;
+                
+        QPoint n [2];
+        
+        n [m_dragged]. setX (( e-> x ( ) - BRD ) * m_scale. width ( ) / ( width ( ) - 2 * BRD ));
+                n [m_dragged]. setY (( e-> y ( ) - BRD ) * m_scale. height ( ) / ( height ( ) - 2 * BRD ));
+        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 ( ));
+                
+                QRect r;
+                int ox [2], oy [2], nx [2], ny [2];
+        
+        for ( int i = 0; i < 2; i++ ) {
+                nx [i] = SCALEX( n [i]. x ( ));
+                ny [i] = SCALEY( n [i]. y ( ));
+                ox [i] = SCALEX( m_p [i]. x ( ));
+                oy [i] = SCALEY( m_p [i]. y ( ));
+        
+                        if ( n [i] != m_p [i] ){
+                                r |= around ( nx [i], ny [i] );
+                                r |= around ( ox [i], oy [i] );
+                        m_p [i] = n [i];
+                        
+                        if ( i == 0 ) {
+                                r |= QRect ( 0, 0, nx [0] - 0 + 1, ny [0] - 0 + 1 );
+                                r |= QRect ( 0, 0, ox [0] - 0 + 1, oy [0] - 0 + 1 );
+                        }
+                        else if ( i == 1 ) {
+                                r |= QRect ( nx [1], ny [1], width ( ) - nx [1], height ( ) - ny [1] ); 
+                                r |= QRect ( ox [1], oy [1], width ( ) - ox [1], height ( ) - oy [1] ); 
+                        }
+                }
+        }
+        if ( r. isValid ( )) {
+                r |= QRect ( nx [0], ny [0], nx [1] - nx [0] + 1, ny [1] - ny [0] + 1 );
+                r |= QRect ( ox [0], oy [0], ox [1] - ox [0] + 1, oy [1] - oy [0] + 1 );
+                
+                repaint ( r );
+        }
+}
+
+void Calibration::mouseReleaseEvent ( QMouseEvent *e )
+{
+        if ( e-> button ( ) != LeftButton )
+                return QWidget::mouseReleaseEvent ( e );
+        
+        if ( m_dragged < 0 )
+                return;
+        
+        int x = SCALEX( m_p [m_dragged]. x ( ));
+        int y = SCALEY( m_p [m_dragged]. y ( ));
+        m_dragged = -1;
+        
+        repaint ( around ( x, y ));
+}
+
+void Calibration::paintEvent ( QPaintEvent * )
+{
+        QPainter p ( this );
+        QColorGroup g = colorGroup ( );
+
+        int x0 = SCALEX( m_p [0]. x ( ));
+        int y0 = SCALEY( m_p [0]. y ( ));
+        int x1 = SCALEX( m_p [1]. x ( ));
+        int y1 = SCALEY( m_p [1]. y ( ));
+                        
+        int dx = x1 - x0;
+        int dy = y1 - y0;
+        
+        int ex = x0, ey = y0;
+        
+        p. setPen ( g. highlight ( ));
+        
+        p. drawLine ( BRD, BRD, ex, BRD );
+        p. drawLine ( ex, BRD, 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 );
+                
+                p. drawLine ( ex, ey, fx, ey );
+                p. drawLine ( fx, ey, fx, fy );
+                                
+                ex = fx;
+                ey = fy;
+                }
+        
+        p. drawLine ( ex, ey, width ( ) - 1 - BRD, ey );
+        
+        p. fillRect ( around ( x0, y0 ), m_dragged == 0 ? g. highlightedText ( ) : g. text ( ));
+        p. fillRect ( around ( x1, y1 ), m_dragged == 1 ? g. highlightedText ( ) : g. text ( ));
+        
+        p. setPen ( g. text ( ));
+        p. drawText ( QRect ( BRD, BRD, width ( ) - 2*BRD, height() - 2*BRD ), AlignTop | AlignRight, tr( "%1 Steps" ). arg ( m_steps ));
+}
+