YQPackageSelectorBase.h

/**************************************************************************
Copyright (C) 2000 - 2010 Novell, Inc.
All Rights Reserved.
 
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
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**************************************************************************/
 
 
 
/*---------------------------------------------------------------------\
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|                        |_|\__,_|____/ |_| |_____|                    |
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|                               core system                            |
|                                                        (C) SuSE GmbH |
\----------------------------------------------------------------------/
 
  File:       YQPackageSelectorBase.h
 
  Author:     Stefan Hundhammer <sh@suse.de>
 
/-*/
 
 
#ifndef YQPackageSelectorBase_h
#define YQPackageSelectorBase_h
 
#include <QEvent>
#include <QFrame>
#include <YEventFilter.h>
 
#include "YPackageSelector.h"
#include "YQZypp.h"
 
 
class QY2ComboTabWidget;
class QAction;
 
class YQPkgConflictDialog;
class YQPkgDiskUsageList;
class YQPkgSelWmCloseHandler;
 
 
/**
 * Abstract base class for package selectors.
 **/
class YQPackageSelectorBase : public QFrame, public YPackageSelector
{
    Q_OBJECT
 
protected:
 
    /**
     * Constructor
     *
     * Will initialize package and selection managers and create conflict
     * dialogs.
     **/
    YQPackageSelectorBase( YWidget * parent, long modeFlags = 0 );
 
    /**
     * Destructor
     **/
    virtual ~YQPackageSelectorBase();
 
 
public:
    /**
     * Set enabled/disabled state.
     *
     * Reimplemented from YWidget.
     **/
    virtual void setEnabling( bool enabled );
 
    /**
     * Preferred width of the widget.
     *
     * Reimplemented from YWidget.
     **/
    virtual int preferredWidth();
 
    /**
     * Preferred height of the widget.
     *
     * Reimplemented from YWidget.
     **/
    virtual int preferredHeight();
 
    /**
     * Set the new size of the widget.
     *
     * Reimplemented from YWidget.
     **/
    virtual void setSize( int newWidth, int newHeight );
 
    /**
     * Accept the keyboard focus.
     *
     * Reimplemented from YWidget.
     **/
    virtual bool setKeyboardFocus();
 
    
public slots:
 
    /**
     * Resolve dependencies (unconditionally) for all resolvables.
     *
     * Returns QDialog::Accepted or QDialog::Rejected.
     **/
    int resolveDependencies();
 
    /**
     * Verifies dependencies of the currently installed system.
     *
     * Returns QDialog::Accepted or QDialog::Rejected.
     **/
    int verifySystem();
 
    /**
     * Check for disk overflow and post a warning dialog if necessary.
     * The user can choose to override this warning.
     *
     * Returns QDialog::Accepted if no warning is necessary or if the user
     * wishes to override the warning, QDialog::Rejected otherwise.
     **/
    int checkDiskUsage();
 
    /**
     * Display a list of automatically selected packages
     * (excluding packages contained in any selections that are to be installed)
     **/
    void showAutoPkgList();
 
    /**
     * Close processing and abandon changes.
     * If there were changes, this will post an "Abandon all changes?" pop-up.
     * 
     * Return 'true' if the user really wants to reject (or if there were no
     * changes anyway), 'false' if not.
     **/
    bool reject();
 
    /**
     * Close processing and accept changes
     **/
    void accept();
 
    /**
     * Close processing and request start of the repository manager 
     **/
    void repoManager();
 
    /**
     * Close processing and request start of the online update configuration 
     **/
    void onlineUpdateConfiguration();
 
    /**
     * Close processing and request start of the online search
     **/
    void onlineSearch();
 
    /**
     * Inform user about a feature that is not implemented yet.
     * This should NEVER show up in the final version.
     **/
    void notImplemented();
 
 
signals:
 
    /**
     * Emitted when package resolving is started.
     * This can be used for some kind of "busy display".
     **/
    void resolvingStarted();
 
    /**
     * Emitted when package resolving is finished.
     **/
    void resolvingFinished();
 
 
protected slots:
 
    /**
     * Reset all previously ignored dependency problems.
     **/
    void resetIgnoredDependencyProblems();
 
 
protected:
 
    /**
     * Show all license agreements the user has not confirmed yet
     * (for all packages that will be installed, and in YOU mode also for
     * patches).
     *
     * Returns 'true' if all licenses were confirmed, 'false' if one or more
     * licenses were not confirmed (in which case some packages might be set to
     * S_TABOO, which might require another resolver run).
     **/
    bool showPendingLicenseAgreements();
 
    /**
     * Show all license agreements in a resolvable range. To be used with
     * zyppPkgBegin() and zyppPkgEnd() or with zyppPatchesBegin() and
     * zyppPatchesEnd().
     **/
    bool showPendingLicenseAgreements( ZyppPoolIterator begin,
                                       ZyppPoolIterator end );
 
    /**
     * Event handler for keyboard input - for debugging and testing.
     *
     * Reimplemented from QWidget.
     **/
    virtual void keyPressEvent( QKeyEvent * ev );
 
 
    // Data members
 
    YQPkgSelWmCloseHandler *    _wmCloseHandler;
    
    bool                        _showChangesDialog;
    YQPkgConflictDialog *       _pkgConflictDialog;
    YQPkgDiskUsageList *        _diskUsageList;
    QAction *                   _actionResetIgnoredDependencyProblems;
};
 
 
 
/**
 * Helper class: Event filter for the WM_CLOSE event
 **/
class YQPkgSelWmCloseHandler: public YEventFilter
{
public:
    YQPkgSelWmCloseHandler( YQPackageSelectorBase * pkgSel )
        : YEventFilter()
        , _pkgSel( pkgSel )
        , _inReject( false )
        {}
 
    virtual ~YQPkgSelWmCloseHandler() {};
 
    /**
     * The filter method: This is what this class is all about.
     * Check for Cancel events (WM_CLOSE).
     **/
    virtual YEvent * filter( YEvent * event );
    
    YQPackageSelectorBase * pkgSel() const { return _pkgSel; }
 
private:
 
    YQPackageSelectorBase *     _pkgSel;
    bool                        _inReject;
};
 
 
#endif // YQPackageSelectorBase_h