hk_dsvisible.h

// ****************************************************************************
// copyright (c) 2000-2004 Horst Knorr <hk_classes@knoda.org>  
// This file is part of the hk_classes library.
// This file may be distributed and/or modified under the terms of the
// GNU Library Public License version 2 as published by the Free Software
// Foundation and appearing in the file COPYING included in the
// packaging of this file.
// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
// WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
// ****************************************************************************
#ifndef  HK_DSVISIBLE
#define  HK_DSVISIBLE
#include "hk_definitions.h"
#include "hk_visible.h"
#include "hk_datetime.h"
using namespace std;
class hk_dsvisiblemodeprivate;
class hk_dsvisibleprivate;
class hk_dsvisible:public hk_visible

{
    friend class hk_datasource;
    public:
        hk_dsvisible(hk_presentation* presentation=NULL);
        virtual         ~hk_dsvisible(void);
        virtual void        set_datasource(hk_datasource* d);
        virtual bool        set_presentationdatasource(long n, bool registerchange=true);
        long        presentationdatasource(void);
        hk_datasource*  datasource(void);
        virtual void savedata(ostream& s, bool savedatasource,bool saveall);
        virtual void savedata(ostream& s  );
        virtual void loaddata(const hk_string& definition);
        void    set_readonly(bool readonly);
        bool    is_readonly(void) const;
        void set_before_row_change_action(const hk_string&, bool registerchange=true);
        hk_string before_row_change_action(void);
        void set_after_row_change_action(const hk_string&, bool registerchange=true);
        hk_string after_row_change_action(void);
        void set_before_update_action(const hk_string&, bool registerchange=true);
        hk_string before_update_action(void);
        void set_after_update_action(const hk_string&, bool registerchange=true);
        hk_string after_update_action(void);
        void set_before_delete_action(const hk_string&, bool registerchange=true);
        hk_string before_delete_action(void);
        void set_after_delete_action(const hk_string&, bool registerchange=true);
        hk_string after_delete_action(void);
        void set_before_insert_action(const hk_string&, bool registerchange=true);
        hk_string before_insert_action(void);
        void set_after_insert_action(const hk_string&, bool registerchange=true);
        hk_string after_insert_action(void);

    protected:
        void        row_change(void);

        void        insert_mode(void);
        virtual void        widget_specific_insert_mode(void){}
        virtual bool        widget_specific_row_change(void) {return false;}
        virtual void        widget_specific_enable_disable(void){}
        virtual void        widget_specific_enable(void){}
        virtual void        widget_specific_disable(void){}
        virtual void        widget_specific_row_added(void){}
        virtual void        widget_specific_row_deleted(void){}
        virtual void        before_row_change(void);
        virtual void        before_store_changed_data(void);
        virtual void        after_store_changed_data(void);
        virtual void        before_insert_row(void){}
        virtual void        before_datasource_enables(void){}
        virtual bool        datasource_disable(void);
        virtual bool        datasource_enable(void);
        virtual void        datasource_delete(void);
        virtual void        row_added(void);
        virtual void        row_deleted(void);
        virtual bool        columns_new_created(void){return true;}
        virtual void        list_changes(listtype type);
        virtual bool        before_columns_deleted(void){return true;}
        virtual bool        table_structure_changes(void){return true;}
        virtual void        before_source_vanishes(void);
        virtual void        widget_specific_presentationdatasource(long){}
        virtual void    presentationmode_changed(void);
        hk_datasource*  p_datasource;
        hk_datetime p_date;
#ifdef HK_DEBUG
        hk_string   debug_p_columnname;
#endif
    private:
        void action_before_store_changed_data(void);
        void action_after_store_changed_data(void);
        void action_before_row_change(void);
        void action_after_row_change(void);
        void action_before_delete(void);
        void action_after_delete(void);
        void action_before_insert(void);
        void action_after_insert(void);
        hk_dsvisiblemodeprivate* p_designdata;
        hk_dsvisiblemodeprivate* p_viewdata;
        hk_dsvisibleprivate* p_private;
//p_already_handled  is used from hk_datasource in bulk operations to find out if this object has been already handled.
        bool    p_already_handled;

};
#endif

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