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+/*
+    This file is part of KAddressBook.
+    Copyright (c) 2002 Mike Pilone <mpilone@slac.com>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program 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 program; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+
+    As a special exception, permission is given to link this program
+    with any edition of Qt, and distribute the resulting executable,
+    without including the source code for Qt in the source distribution.
+*/
+
+#ifndef KADDRESSBOOKVIEW_H
+#define KADDRESSBOOKVIEW_H
+
+#ifndef KAB_EMBEDDED
+#include <klibloader.h>
+#endif //KAB_EMBEDDED
+
+class KConfig;
+class QDropEvent;
+
+#include <qstringlist.h>
+#include <kabc/field.h>
+#include <qwidget.h>
+
+#include "viewconfigurewidget.h"
+#include "filter.h"
+
+namespace KABC { class AddressBook; }
+
+/**
+  Base class for all views in kaddressbook. This class implements
+  all the common methods needed to provide a view to the user.
+ 
+  To implement a specific view (table, card, etc), just inherit from
+  this class and implement all the pure virtuals.
+ 
+  @author Mike Pilone <mpilone@slac.com>
+ */
+class KAddressBookView : public QWidget
+{
+  Q_OBJECT
+
+  public:
+    enum DefaultFilterType { None = 0, Active = 1, Specific = 2 };
+    
+    KAddressBookView( KABC::AddressBook *ab, QWidget *parent, const char *name );
+    virtual ~KAddressBookView();
+
+    /**
+      Must be overloaded in subclasses. Should return a list of
+      all the uids of selected contacts.
+     */
+    virtual QStringList selectedUids() = 0;
+
+    /**
+      Called whenever this view should read the config. This can be used
+      as a sign that the config has changed, therefore the view should
+      assume the worst and rebuild itself if necessary. For example,
+      in a table view this method may be called when the user adds or
+      removes columns from the view.
+
+      If overloaded in the subclass, do not forget to call super class's
+      method.
+
+      @param config The KConfig object to read from. The group will already
+      be set, so do not change the group.
+     */
+    virtual void readConfig( KConfig *config );
+
+    /**
+      Called whenever this view should write the config. The view should not
+      write out information handled by the application, such as which fields
+      are visible. The view should only write out information specific
+      to itself (i.e.: All information in the ViewConfigWidget)
+
+      If overloaded in the subclass, do not forget to call the super class's
+      method.
+
+      @param config The KConfig object to read from. The group will already
+      be set, so do not change the group.
+     */
+    virtual void writeConfig( KConfig *config );
+
+    /**
+      Returns a QString with all the selected email addresses concatenated
+      together with a ',' seperator.
+     */
+    virtual QString selectedEmails();
+
+    /**
+      Return the type of the view: Icon, Table, etc. Please make sure that
+      this is the same value that ViewWrapper::type() will return for your
+      view.
+     */
+    virtual QString type() const = 0;
+
+    /**
+      Returns a list of the fields that should be displayed. The list
+      is composed of the fields proper names (ie: Home Address), so
+      the view may need to translate them in order to get the
+      value from the addressee.
+    
+      This list is generated from the config file, so it is advisable to call
+      this method whenever a readConfig() is called in order to get the newest
+      list of fields.
+     */
+    KABC::Field::List fields() const;
+    
+    /**
+      Sets the active filter. This filter will be used for filtering
+      the list of addressees to display. The view will <b>not</b>
+      automatically refresh itself, so in most cases you will want to call
+      KAddressBookView::refresh() after this method.
+     */
+    void setFilter( const Filter& );
+    
+    /**
+      @return The default filter type selection. If the selection
+      is SpecificFilter, the name of the filter can be retrieved with
+      defaultFilterName()
+     */
+    DefaultFilterType defaultFilterType() const;
+    
+    /**
+      @return The name of the default filter. This string is
+      only valid if defaultFilterType() is returning SpecificFilter.
+     */
+    const QString &defaultFilterName() const;
+    
+    /**
+      @return The address book.
+     */
+    KABC::AddressBook *addressBook() const;
+
+  public slots:
+    /**
+      Must be overloaded in subclasses to refresh the view.
+      Refreshing includes updating the view to ensure that only items
+      in the document are visible. If <i>uid</i> is valid, only the
+      addressee with uid needs to be refreshed. This is an optimization
+      only.
+     */
+    virtual void refresh( QString uid = QString::null ) = 0;
+
+    /**
+      This method must be overloaded in subclasses. Select (highlight)
+      the addressee matching <i>uid</i>. If uid
+      is equal to QString::null, then all addressees should be selected.
+     */
+#ifndef KAB_EMBEDDED
+//MOC_SKIP_BEGIN
+    virtual void setSelected( QString uid = QString::null, bool selected = true ) = 0;
+//MOC_SKIP_END
+#else //KAB_EMBEDDED
+    //US my moc can not handle the default parameters. Is this a problem ???
+    virtual void setSelected( QString uid, bool selected) = 0;
+#endif //KAB_EMBEDDED
+
+  signals:
+    /**
+      This signal should be emitted by a subclass whenever an addressee
+      is modified.
+     */
+    void modified();
+
+    /**
+      This signal should be emitted by a subclass whenever an addressee
+      is selected. Selected means that the addressee was given the focus.
+      Some widgets may call this 'highlighted'. The view is responsible for
+      emitting this signal multiple times if multiple items are selected,
+      with the last item selected being the last emit.
+    
+      @param uid The uid of the selected addressee.
+    
+      @see KListView
+     */
+    void selected( const QString &uid );
+    void deleteRequest();
+    /**
+      This signal should be emitted by a subclass whenever an addressee
+      is executed. This is defined by the KDE system wide config, but it
+      either means single or doubleclicked.
+    
+      @param ui The uid of the selected addressee
+    
+      @see KListView
+     */
+    void executed( const QString &uid );
+    
+    /**
+      This signal is emitted whenever a user attempts to start a drag
+      in the view. The slot connected to this signal would usually want
+      to create a QDragObject.
+     */
+    void startDrag();
+    
+    /**
+      This signal is emitted whenever the user drops something on the
+      view. The individual view should handle checking if the item is
+      droppable (ie: if it is a vcard).
+     */
+    void dropped( QDropEvent* );
+
+  protected:
+    /**
+      Returns a list of the addressees that should be displayed. This method
+      should always be used by the subclass to get a list of addressees. This
+      method internally takes many factors into account, including the current
+      filter.
+     */
+    KABC::Addressee::List addressees();
+
+    /**
+      This method returns the widget that should be used as the parent for
+      all view components. By using this widget as the parent and not
+      'this', the view subclass has the option of placing other widgets
+      around the view (ie: search fields, etc). Do not delete this widget!
+     */
+    QWidget *viewWidget();
+
+  private:
+    void initGUI();
+
+    DefaultFilterType mDefaultFilterType;
+    Filter mFilter;
+    QString mDefaultFilterName;
+    KABC::AddressBook *mAddressBook;
+    KABC::Field::List mFieldList;
+    
+    QWidget *mViewWidget;
+};
+
+#ifndef KAB_EMBEDDED
+//MOC_SKIP_BEGIN
+class ViewFactory : public KLibFactory
+//MOC_SKIP_END
+#else //KAB_EMBEDDED
+class ViewFactory
+#endif //KAB_EMBEDDED
+{
+  
+  public:
+    virtual KAddressBookView *view( KABC::AddressBook *ab, QWidget *parent,
+                                    const char *name = 0 ) = 0;
+
+    /**
+      @return The type of the view. This is normally a small one word
+      string (ie: Table, Icon, Tree, etc).
+     */
+   virtual QString type() const = 0;
+    
+    /**
+      @return The description of the view. This should be a 3 to
+      4 line string (don't actually use return characters in the string)
+      describing the features offered by the view.
+     */
+   virtual QString description() const = 0;
+    
+    /**
+      Creates a config dialog for the view type. The default 
+      implementation will return a ViewConfigDialog. This default
+      dialog will allow the user to set the visible fields only. If
+      you need more config options (as most views will), this method
+      can be overloaded to return your sublcass of ViewConfigDialog.
+      If this method is over loaded the base classes method should
+      <B>not</B> be called.
+     */
+    virtual ViewConfigureWidget *configureWidget( KABC::AddressBook *ab,
+                                                  QWidget *parent,
+                                                  const char *name = 0 ); 
+
+  protected:
+    virtual QObject* createObject( QObject*, const char*, const char*,
+                                   const QStringList & )
+    {
+      return 0;
+    }
+    
+};
+
+
+#endif