1 files changed, 260 insertions, 0 deletions
diff --git a/libkscan/kscanoption.h b/libkscan/kscanoption.h
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+++ b/libkscan/kscanoption.h
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+/* This file is part of the KDE Project
+   Copyright (C) 2000 Klaas Freitag <freitag@suse.de>  
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+
+   This library 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public License
+   along with this library; see the file COPYING.LIB.  If not, write to
+   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02110-1301, USA.
+*/
+
+#ifndef _KSCANOPTION_H_
+#define _KSCANOPTION_H_
+
+#include <qwidget.h>
+#include <qdict.h>
+#include <qobject.h>
+#include <qstrlist.h>
+#include <qsocketnotifier.h>
+#include <qdatastream.h>
+
+extern "C" {
+#include <sane/sane.h>
+#include <sane/saneopts.h>
+}
+
+
+typedef enum { KSCAN_OK, KSCAN_ERROR, KSCAN_ERR_NO_DEVICE,
+	       KSCAN_ERR_BLOCKED, KSCAN_ERR_NO_DOC, KSCAN_ERR_PARAM,
+               KSCAN_ERR_OPEN_DEV, KSCAN_ERR_CONTROL, KSCAN_ERR_EMPTY_PIC,
+               KSCAN_ERR_MEMORY, KSCAN_ERR_SCAN, KSCAN_UNSUPPORTED,
+               KSCAN_RELOAD, KSCAN_CANCELLED, KSCAN_OPT_NOT_ACTIVE }
+KScanStat;
+
+typedef enum { INVALID_TYPE, BOOL, SINGLE_VAL, RANGE, GAMMA_TABLE, STR_LIST, STRING }
+KSANE_Type;
+
+class KGammaTable;
+
+
+/**
+ *  This is KScanOption, a class which holds a single scanner option.
+ *
+ *  @short KScanOption
+ *  @author Klaas Freitag
+ *  @version 0.1alpha
+ *
+ *  is a help class for accessing the scanner options.
+ **/
+
+
+class KScanOption : public QObject
+{
+  Q_OBJECT
+
+public:
+  /**
+   * creates a new option object for the named option. After that, the
+   * option is valid and contains the correct value retrieved from the
+   * scanner.
+   **/
+  KScanOption( const QCString& new_name );
+
+  /**
+   * creates a KScanOption from another
+   **/
+  KScanOption( const KScanOption& so );
+  ~KScanOption();
+
+   /**
+    * tests if the option is initialised. It is initialised, if the value
+    * for the option was once read from the scanner
+    **/
+  bool initialised( void ){ return( ! buffer_untouched );}
+
+   /**
+    * checks if the option is valid, means that the option is known by the scanner
+    **/
+  bool valid( void ) const;
+
+   /**
+    * checks if the option is auto setable, what means, the scanner can cope
+    * with the option automatically.
+    **/
+  bool autoSetable( void );
+
+   /**
+    * checks if the option is a so called common option. All frontends should
+    * provide gui elements to change them.
+    **/
+  bool commonOption( void );
+
+   /**
+    * checks if the option is active at the moment. Note that this changes
+    * on runtime due to the settings of mode, resolutions etc.
+    **/
+  bool active( void );
+
+   /**
+    * checks if the option is setable by software. Some scanner options can not
+    * be set by software.
+    **/
+  bool softwareSetable();
+
+   /**
+    * returns the type the option is. Type is one of
+    * INVALID_TYPE, BOOL, SINGLE_VAL, RANGE, GAMMA_TABLE, STR_LIST, STRING
+    **/
+  KSANE_Type type( void ) const;
+
+   /**
+    * set the option depending on the type
+    **/
+  bool set( int val );
+  bool set( double val );
+  bool set( int *p_val, int size );
+  bool set( const QCString& );
+  bool set( bool b ){ if( b ) return(set( (int)(1==1) )); else return( set( (int) (1==0) )); }
+  bool set( KGammaTable  *gt );
+
+   /**
+    * retrieves the option value, depending on the type.
+    **/
+  bool get( int* ) const;
+  bool get( KGammaTable* ) const;
+  QCString get( void ) const;
+
+   /**
+    * This function creates a widget for the scanner option depending
+    * on the type of the option.
+    *
+    * For boolean options, a checkbox is generated. For ranges, a KSaneSlider
+    * is generated.
+    *
+    * For a String list such as mode etc., a KScanCombo is generated.
+    *
+    * For option type string and gamma table, no widget is generated yet.
+    *
+    * The widget is maintained completely by the kscanoption object.
+    *
+    **/
+
+  QWidget *createWidget( QWidget *parent,
+			 const QString& w_desc = QString::null,
+			 const QString& tooltip = QString::null );
+
+  /* Operators */
+  const KScanOption& operator= (const KScanOption& so );
+
+   const QString configLine( void );
+
+   
+  // Possible Values
+  QStrList    getList() const;
+  bool        getRangeFromList( double*, double*, double* ) const;
+  bool        getRange( double*, double*, double* ) const;
+
+  QCString    getName() const { return( name ); }
+  void *      getBuffer() const { return( buffer ); }
+  QWidget     *widget( ) const { return( internal_widget ); }
+  /**
+   *  returns the type of the selected option.
+   *  This might be SINGLE_VAL, VAL_LIST, STR_LIST, GAMMA_TABLE,
+   *  RANGE or BOOL
+   *
+   *  You may use the information returned to decide, in which way
+   *  the option is to set.
+   *
+   *  A SINGLE_VAL is returned in case the value is represented by a
+   *  single number, e.g. the resoltion.
+   *
+   *  A VAL_LIST is returned in case the value needs to be set by
+   *  a list of numbers. You need to check the size to find out,
+   *  how many numbers you have to
+   *  @param name: the name of a option from a returned option-List
+   *  return a option type.
+
+   ### not implemented at all?
+   **/
+  KSANE_Type typeToSet( const QCString& name );
+
+  /**
+   *  returns a string describing the unit of given the option.
+   *  @return the unit description, e.g. mm
+   *  @param name: the name of a option from a returned option-List
+
+   ###  not implemented at all?
+   **/
+  QString unitOf( const QCString& name );
+
+public slots:
+  void       slRedrawWidget( KScanOption *so );
+  /**
+   *	 that slot makes the option to reload the buffer from the scanner.
+   */
+  void       slReload( void );
+
+protected slots:
+  /**
+   *  this slot is called if an option has a gui element (not all have)
+   *  and if the value of the widget is changed.
+   *  This is an internal slot.
+   **/
+  void		  slWidgetChange( void );
+  void		  slWidgetChange( const QCString& );
+  void		  slWidgetChange( int );
+	
+  signals:
+  /**
+   *  Signal emitted if a option changed for different reasons.
+   *  The signal should be connected by outside objects.
+   **/
+  void      optionChanged( KScanOption*);
+  /**
+   *  Signal emitted if the option is set by a call to the set()
+   *  member of the option. In the slot needs to be checked, if
+   *  a widget exists, it needs to be set to the new value.
+   *  This is a more internal signal
+   **/
+  void      optionSet( void );
+
+  /**
+   *  Signal called when user changes a gui - element
+   */
+  void      guiChange( KScanOption* );
+
+private:
+  bool       applyVal( void );
+  bool       initOption( const QCString& new_name );
+  void       *allocBuffer( long );
+
+  QWidget    *entryField ( QWidget *parent, const QString& text );
+  QWidget    *KSaneSlider( QWidget *parent, const QString& text );
+  QWidget    *comboBox   ( QWidget *parent, const QString& text );
+	
+  const      SANE_Option_Descriptor *desc;
+  QCString    name;
+  void       *buffer;
+  QWidget    *internal_widget;
+  bool       buffer_untouched;
+  size_t     buffer_size;
+
+  /* For gamma-Tables remember gamma, brightness, contrast */
+  int        gamma, brightness, contrast;
+
+   class KScanOptionPrivate;
+   KScanOptionPrivate *d;
+};
+
+
+
+#endif