/*
    This file is part of KMail.

    Copyright (c) 2004 Cornelius Schumacher <schumacher@kde.org>

    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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

    As a special exception, permission is given to link this program
    with any edition of TQt, and distribute the resulting executable,
    without including the source code for TQt in the source distribution.
*/
#ifndef RECIPIENTSEDITOR_H
#define RECIPIENTSEDITOR_H

#include <tqwidget.h>
#include <tqscrollview.h>
#include <tqguardedptr.h>
#include <tqlineedit.h>
#include <tqtooltip.h>

#include "kmlineeditspell.h"
#include <tqcombobox.h>

class RecipientsPicker;

class KWindowPositioner;

class TQLabel;
class TQPushButton;
class SideWidget;

class Recipient
{
  public:
    typedef TQValueList<Recipient> List;

    enum Type { To, Cc, Bcc, Undefined };

    Recipient( const TQString &email = TQString(), Type type = To );

    void setType( Type );
    Type type() const;

    void setEmail( const TQString & );
    TQString email() const;

    bool isEmpty() const;

    static int typeToId( Type );
    static Type idToType( int );

    TQString typeLabel() const;    static TQString typeLabel( Type );
    static TQStringList allTypeLabels();

  private:
    TQString mEmail;
    Type mType;
};

class RecipientComboBox : public TQComboBox
{
    Q_OBJECT
  
  public:
    RecipientComboBox( TQWidget *parent );

  signals:
    void rightPressed();

  protected:
    void keyPressEvent( TQKeyEvent *ev );
};

class RecipientLineEdit : public KMLineEdit
{
    Q_OBJECT
  
  public:
    RecipientLineEdit( TQWidget * parent ) :
      KMLineEdit( true, parent ) {}

  signals:
    void deleteMe();
    void leftPressed();
    void rightPressed();

  protected:
    void keyPressEvent( TQKeyEvent *ev );
};

class RecipientLine : public TQWidget
{
    Q_OBJECT
  
  public:
    RecipientLine( TQWidget *parent );

    void setRecipient( const Recipient & );
    Recipient recipient() const;

    void setRecipientType( Recipient::Type );
    Recipient::Type recipientType() const;

    void setRecipient( const TQString & );

    void activate();
    bool isActive();

    bool isEmpty();

    /** Returns true if the user has made any modifications to this
        RecipientLine.
    */
    bool isModified();

    /** Resets the modified flag to false.
    */
    void clearModified();

    int setComboWidth( int w );

    void fixTabOrder( TQWidget *previous );
    TQWidget *tabOut() const;

    void clear();

    int recipientsCount();

    void setRemoveLineButtonEnabled( bool b );

  signals:
    void returnPressed( RecipientLine * );
    void downPressed( RecipientLine * );
    void upPressed( RecipientLine * );
    void rightPressed();
    void deleteLine(  RecipientLine * );
    void countChanged();
    void typeModified( RecipientLine * );

  protected:
    void keyPressEvent( TQKeyEvent * );
    RecipientLineEdit* lineEdit() const { return mEdit; }

  protected slots:
    void slotReturnPressed();
    void analyzeLine( const TQString & );
    void slotFocusUp();
    void slotFocusDown();
    void slotPropagateDeletion();
    void slotTypeModified();

  private:
    friend class RecipientsView;
    TQComboBox *mCombo;
    RecipientLineEdit *mEdit;
    TQPushButton *mRemoveButton;
    int mRecipientsCount;
    bool mModified;
};

class RecipientsView : public TQScrollView
{
    Q_OBJECT
  
  public:
    RecipientsView( TQWidget *parent );

    TQSize minimumSizeHint() const;
    TQSize sizeHint() const;

    RecipientLine *activeLine();

    RecipientLine *emptyLine();

    Recipient::List recipients() const;

    /** Removes the recipient provided it can be found and has the given type.
        @param recipient The recipient(s) you want to remove.
        @param type      The recipient type.
    */
    void removeRecipient( const TQString & recipient, Recipient::Type type );

    /** Returns true if the user has made any modifications to the list of
        recipients.
    */
    bool isModified();

    /** Resets the modified flag to false.
    */
    void clearModified();

    void activateLine( RecipientLine * );

    /**
      * Set the width of the left most column to be the argument width.
      * This method allows other widgets to align their label/combobox column with ours
      * by communicating how many pixels that first colum is for them.
      * Returns the width that is actually being used.
      */
    int setFirstColumnWidth( int );

  public slots:
    void setCompletionMode( TDEGlobalSettings::Completion );
    RecipientLine *addLine();

    void setFocus();
    void setFocusTop();
    void setFocusBottom();

  signals:
    void totalChanged( int recipients, int lines );
    void focusUp();
    void focusDown();
    void focusRight();
    void completionModeChanged( TDEGlobalSettings::Completion );
    void sizeHintChanged();

  protected:
    void viewportResizeEvent( TQResizeEvent * );
    void resizeView();

  protected slots:
    void slotReturnPressed( RecipientLine * );
    void slotDownPressed( RecipientLine * );
    void slotUpPressed( RecipientLine * );
    void slotDecideLineDeletion(  RecipientLine * );
    void slotDeleteLine();
    void calculateTotal();
    void slotTypeModified( RecipientLine * );
    void moveCompletionPopup();

  private:
    TQPtrList<RecipientLine> mLines;
    TQGuardedPtr<RecipientLine> mCurDelLine;
    int mLineHeight;
    int mFirstColumnWidth;
    bool mModified;
    TDEGlobalSettings::Completion mCompletionMode;
};

class RecipientsToolTip : public TQToolTip
{
  public:
    RecipientsToolTip( RecipientsView *, TQWidget *parent );

  protected:
    void maybeTip( const TQPoint & p );

    TQString line( const Recipient & );

  private:
    RecipientsView *mView;
};

class SideWidget : public TQWidget
{
    Q_OBJECT
  
  public:
    SideWidget( RecipientsView *view, TQWidget *parent );
    ~SideWidget();

    RecipientsPicker* picker() const;

  public slots:
    void setTotal( int recipients, int lines );
    void setFocus();

    void pickRecipient();

  signals:
    void pickedRecipient( const Recipient & );
    void saveDistributionList();

  private:
    RecipientsView *mView;
    TQLabel *mTotalLabel;
    TQPushButton *mDistributionListButton;
    TQPushButton *mSelectButton;
    /** The RecipientsPicker is lazy loaded, never access it directly,
      only through picker() */
    mutable RecipientsPicker *mRecipientPicker;
    /** lazy loaded, don't access directly, unless you've called picker() */
    mutable KWindowPositioner *mPickerPositioner;
};

class RecipientsEditor : public TQWidget
{
    Q_OBJECT
  
  public:
    RecipientsEditor( TQWidget *parent );
    ~RecipientsEditor();

    void clear();

    Recipient::List recipients() const;
    RecipientsPicker* picker() const;

    void setRecipientString( const TQString &, Recipient::Type );
    TQString recipientString( Recipient::Type );

    /** Adds a recipient (or multiple recipients) to one line of the editor.
        @param recipient The recipient(s) you want to add.
        @param type      The recipient type.
    */
    void addRecipient( const TQString & recipient, Recipient::Type type );

    /** Removes the recipient provided it can be found and has the given type.
        @param recipient The recipient(s) you want to remove.
        @param type      The recipient type.
    */
    void removeRecipient( const TQString & recipient, Recipient::Type type );

    /** Returns true if the user has made any modifications to the list of
        recipients.
    */
    bool isModified();

    /** Resets the modified flag to false.
    */
    void clearModified();

    /**
      * Set the width of the left most column to be the argument width.
      * This method allows other widgets to align their label/combobox column with ours
      * by communicating how many pixels that first colum is for them.
      * Returns the width that is actually being used.
      */
    int setFirstColumnWidth( int );

    /**
      * Set completion mode for all lines
      */
    void setCompletionMode( TDEGlobalSettings::Completion );

  public slots:
    void setFocus();
    void setFocusTop();
    void setFocusBottom();

    void selectRecipients();
    void saveDistributionList();

  signals:
    void focusUp();
    void focusDown();
    void completionModeChanged( TDEGlobalSettings::Completion );
    void sizeHintChanged();

  protected slots:
    void slotPickedRecipient( const Recipient & );

  private:
    RecipientsView *mRecipientsView;
    SideWidget* mSideWidget;
    bool mModified;
};

#endif