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<h1>Source: hk_classes/hk_classes/hk_presentation.h</h1>
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// ****************************************************************************
// copyright (c) 2000-2002 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_PRESENTATION
#define HK_PRESENTATION
#include <list>
#include <exception>
//#include <fstream.h>
#include "hk_dsmodevisible.h"
using namespace std;
#include "hk_datasource.h"
#include "hk_interpreter.h"
class hk_database;
class hk_form;
class hk_presentationprivate;
/**
*
*@short base class for multidatasource based classes like forms and reports
*@version $Revision: 1.2 $
*@author Horst Knorr (hk_classes@knoda.org)
*
*@internal
*hk_presentation is the base class for multidatasource based classes like forms and reports. A presentation can
*be designed when @ref mode is 'design' or the data will be presented when mode is 'view'.
*
In 'design' mode you can create new datasource by calling the function @ref new_datasource. Each datasource get's
*a unique number (see @ref hk_datasource::presentationnumber) with which you can identifiy each datasource.
*All used datasources will be automatically enabled when the presentation is in 'view'-mode.
*/
class hk_presentation :public hk_dsmodevisible
{
friend class hk_datasource;
friend class hk_database;
friend class hk_dsvisible;
friend class hk_visible;
public:
hk_presentation(void);
virtual ~hk_presentation(void);
/**
*set the database which is base of this presentation
*/
void set_database(hk_database* db);
hk_database* database(void);
enum enum_presentationtype {general,form,report};
enum_presentationtype presentationtype(void)const {return p_presentationtype;}
/**
* name of the presentation under which it will be stored
*/
void set_name(const hk_string& n);
hk_string name(void);
virtual bool set_mode(enum_mode s);
/**
*a list of all existing datasources in this presentation
*/
list<hk_datasource*>* datasources(void);
/**
* loads an existing datasource "name". if query=false this datasource is a table else a query.
* @return each presentationdatasource gets a unique number as an identifier.
*/
long new_datasource(const hk_string& name,bool query=false);
/**
* returns the datasource with the unique identification number nr
*/
hk_datasource* get_datasource(long nr);
hk_datasource* get_datasource(const hk_string& description);
/**
returns a unique name for a datasource
looks like : nameofdatasource (uniquenumber) [dependingondatasource] | filter
*/
hk_string unique_datasourcename(long nr);
virtual void savedata(ostream& s);
virtual void loaddata(const hk_string& definition);
/**
*resets the internal datasourcelist and deletes all datasourceobjects except of "nodelete"
*/
void clear_datasourcelist(void);
/**
* @return true if the presentation has changed (i.e. a datasource has been created or deleted )
*/
bool has_changed(void);
void has_changed(bool registerchange);
/**
* sets the logic size of the form. To this all visible objects will be calculated except they are
* of dynamic size.
*/
void set_designsize(unsigned int width, unsigned int height,bool registerchange=true);
virtual void set_presentationsize(unsigned int,unsigned int);
unsigned int designwidth(void);
unsigned int designheight(void);
unsigned int horizontal2relativ(unsigned int h);
unsigned int vertical2relativ(unsigned int v);
unsigned int relativ2horizontal(unsigned int r);
unsigned int relativ2vertical(unsigned int r);
virtual void register_object(hk_visible*);
/**
* if true (default) all datasources will be automatically enabled when mode changes to viewmode
* else you have to enable the datasources manually
*/
void set_automatic_enable_datasources(bool);
bool automatic_enable_datasources(void);
enum enum_bulkoperation {bulkfont,bulkforeground,bulkbackground};
virtual void bulk_operation(enum_bulkoperation bulkoperation);
enum enum_sizetype {relative,absolute};
void set_sizetype(enum_sizetype type,bool registerchange=true);
enum_sizetype sizetype(void);
static void set_defaultsizetype(enum_sizetype type);
static enum_sizetype defaultsizetype(void);
static void set_snap2gridx(int);
static int snap2gridx(void) ;
static void set_snap2gridy(int);
static int snap2gridy(void) ;
hk_interpreter* interpreter(void);
virtual void script_error(hk_visible*, hk_interpreter::enum_action){}
void set_interpretername(const hk_string&,bool registerchange=true);
hk_string interpretername(void) const;
void reset_has_changed(void);
protected:
void remove_datasource(long nr);
void set_has_changed(void);
virtual void widget_specific_presentationresize(void){}
virtual void widget_specific_fieldresize(hk_visible* ){}
enum_presentationtype p_presentationtype;
void database_delete(void);
//will be called from database_delete()
virtual void database_has_vanished(void);
void before_source_vanishes(void);
bool ask_name(void);
virtual void raise_widget(hk_visible*){}
virtual void lower_widget(hk_visible*){}
unsigned int p_actualwidth;
unsigned int p_actualheight;
void enable_datasources(bool enable,hk_datasource::enum_accessmode mode=hk_datasource::standard);
virtual void sizetype_changed(void);
private:
void remove_datasource( hk_datasource* d);
long add_datasource(hk_datasource* d);
hk_presentationprivate* p_private;
static enum_sizetype p_defaultsizetype;
static int p_snap_to_gridx;
static int p_snap_to_gridy;
};
#endif
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