/* 
 *
 * $Id: k3binteractiondialog.h 619556 2007-01-03 17:38:12Z trueg $
 * Copyright (C) 2003 Sebastian Trueg <trueg@k3b.org>
 *
 * This file is part of the K3b project.
 * Copyright (C) 1998-2007 Sebastian Trueg <trueg@k3b.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.
 * See the file "COPYING" for the exact licensing terms.
 */

#ifndef _K3B_INTERACTION_DIALOG_H_
#define _K3B_INTERACTION_DIALOG_H_

#include <kdialog.h>


class TQGridLayout;
class TQLabel;
class KPushButton;
class TQButton;
class K3bThemedHeader;
class KConfigBase;
class KGuiItem;


/**
 * This is the base dialog for all the dialogs in K3b that start 
 * some job. Use setMainWidget to set the contents or let mainWidget()
 * create an empty plain page.
 * The default implementations of the slots just emit the 
 * corresponding signals.
 */
class K3bInteractionDialog : public KDialog
{
  Q_OBJECT
  TQ_OBJECT

 public:
  /**
   * The constructor.
   * loadUserDefaults will be called automatically when the dialog is showing.
   *
   * @param title the text to be displayed in the K3b header (not the widget frame)
   * @param subTitle additional text that will be displayed after the title in smaller size
   * @param buttonMask combination of Buttons
   * @param defaultButton may also be null to deactivate the feature
   * @param configgroup The config group used for the loadUserDefaults and saveUserDefaults methods
   */
  K3bInteractionDialog( TQWidget* parent = 0, 
			const char* name = 0, 
			const TQString& title = TQString(),
			const TQString& subTitle = TQString(),
			int buttonMask = START_BUTTON|CANCEL_BUTTON,
			int defaultButton = START_BUTTON,
			const TQString& configgroup = TQString(),
			bool modal = true, 
			WFlags fl = 0 );
  virtual ~K3bInteractionDialog();

  void setMainWidget( TQWidget* w );
  void setTitle( const TQString& title, const TQString& subTitle = TQString() );
  void setDefaultButton( int b );

  /**
   * Reimplemented for internal reasons. The API does not change.
   */
  int exec();

  /**
   * @param returnOnHide if false the dialog can be hidden and shown without being closed.
   *        one needs to call close() to actually close the dialog.
   */
  int exec( bool returnOnHide );

  /**
   * reimplemented to allow initialization after the dialog has been opened.
   */
  void show();

  /**
   * Reimplemented for internal reasons. The API does not change.
   */
  void hide();

  /**
   * Reimplemented for internal reasons. The API does not change.
   */
  bool close( bool alsoDelete );

  inline bool close() { return close( false ); }

  /**
   * If no mainWidget has been set a plain page will be created.
   */
  TQWidget* mainWidget();

  enum Buttons {
    START_BUTTON = 1,
    SAVE_BUTTON = 2,
    CANCEL_BUTTON = 4
  };

  TQSize tqsizeHint() const;

  const TQString& configGroup() const { return m_configGroup; }

  /**
   * K3b's dialogs use this method to determine if it is safe to hide when starting
   * some action. Take for example the copy dialog which starts a copy job with a progress
   * dialog. Both the job and the progress dialog are deleted by the copy dialog after the
   * progress dialog has been closed. If the copy dialog would hide itself before starting
   * the job and exitLoopOnHide() would return true the hiding would result in the exec call
   * of the copy dialog to return. And what would that mean for the code after the hide()
   * statement (deleting of the job and so on).
   *
   * \return true in case this dialog will not exit it's private event loop
   *              in case it is hidden.
   *
   * \see exec(bool)
   */
  bool exitLoopOnHide() const { return m_exitLoopOnHide; }

  enum StartUpSettings {
    LOAD_K3B_DEFAULTS = 1,
    LOAD_SAVED_SETTINGS = 2,
    LOAD_LAST_SETTINGS = 3
  };

 signals:
  void started();
  void canceled();
  void saved();

 public slots:
  /**
   * \deprecated use setButtonText
   */
  void setStartButtonText( const TQString& text, 
			   const TQString& tooltip = TQString(), 
			   const TQString& whatsthis = TQString() );
  /**
   * \deprecated use setButtonText
   */
  void setCancelButtonText( const TQString& text, 
			    const TQString& tooltip = TQString(), 
			    const TQString& whatsthis = TQString() );
  /**
   * \deprecated use setButtonText
   */
  void setSaveButtonText( const TQString& text, 
			  const TQString& tooltip = TQString(), 
			  const TQString& whatsthis = TQString() );

  void setButtonGui( int button,
		     const KGuiItem& );

  void setButtonText( int button,
		      const TQString& text, 
		      const TQString& tooltip = TQString(), 
		      const TQString& whatsthis = TQString() );

  void setButtonEnabled( int button, bool enabled );
  void setButtonShown( int button, bool enabled );

  /**
   * If set true the init() method will be called via a TQTimer to ensure event
   * handling be done before (default: false).
   */
  void setDelayedInitialization( bool b ) { m_delayedInit = b; }

 protected slots:
   // FIXME: replace these with protected methods which are called from private slots.
  virtual void slotStartClicked();

  /**
   * The default implementation emits the canceled() signal
   * and calls close()
   */
  virtual void slotCancelClicked();
  virtual void slotSaveClicked();

  /**
   * This slot will call the toggleAll() method protecting from infinite loops
   * caused by one element influencing another element which in turn influences
   * the first.
   *
   * Connect this slot to GUI elements (like Checkboxes) that change
   * the state of the whole dialog.
   */
  void slotToggleAll();

 protected:
  /**
   * Reimplement this method in case you are using slotToggleAll()
   */
  virtual void toggleAll();

  /**
   * Reimplement this to support the save/load user default buttons.
   * @p config is already set to the correct group.
   *
   * The save/load buttons are only activated if the config group is
   * set in the constructor.
   */
  virtual void saveUserDefaults( KConfigBase* config );

  /**
   * Reimplement this to support the save/load user default buttons.
   * @p config is already set to the correct group.
   *
   * The save/load buttons are only activated if the config group is
   * set in the constructor.
   */
  virtual void loadUserDefaults( KConfigBase* config );

  /**
   * Reimplement this to support the "k3b defaults" button.
   * set all GUI options to reasonable defaults.
   */
  virtual void loadK3bDefaults();

  /**
   * This is called after the dialog has been shown.
   * Use this for initialization that should happen
   * when the user already sees the dialog.
   */
  virtual void init() {}

  /**
   * reimplemented from TQDialog
   */
  virtual bool eventFilter( TQObject*, TQEvent* );

 protected slots:
  /**
   * Reimplemented for internal reasons. The API does not change.
   */
  virtual void done( int );

 private slots:
  void slotLoadK3bDefaults();
  void slotLoadUserDefaults();
  void slotSaveUserDefaults();
  void slotLoadLastSettings();
  void slotStartClickedInternal();
  void slotDelayedInit();

 private:
  void initConnections();
  void initToolTipsAndWhatsThis();
  void saveLastSettings();
  void loadStartupSettings();

  KPushButton* getButton( int );

  K3bThemedHeader* m_dialogHeader;
  KPushButton* m_buttonStart;
  KPushButton* m_buttonSave;
  KPushButton* m_buttonCancel;
  TQWidget* m_mainWidget;

  TQButton* m_buttonLoadSettings;
  TQButton* m_buttonSaveSettings;

  TQGridLayout* mainGrid;
  int m_defaultButton;
  TQString m_configGroup;

  bool m_exitLoopOnHide;
  bool m_inLoop;
  bool m_inToggleMode;
  bool m_delayedInit;
};

#endif