wxWidgets/samples/db/listdb.h

///////////////////////////////////////////////////////////////////////////////
// Name:        listdb.h
// Purpose:     wxWindows database demo app
// Author:      George Tasker
// Modified by:
// Created:     1996
// RCS-ID:      $Id$
// Copyright:   (c) 1996 Remstar International, Inc.
// Licence:     wxWindows licence
///////////////////////////////////////////////////////////////////////////////

#ifdef __GNUG__
#pragma interface "listdb.h"
#endif

/*
	Contains dialog class for creating a data table lookup listbox
*/

#ifndef LISTDB_DOT_H
#define LISTDB_DOT_H


#include <wx/dbtable.h>

const int LOOKUP_COL_LEN = 250;

// Global database connection
extern wxDB *READONLY_DB;

// Clookup class
class Clookup : public wxTable
{
	public:

		char lookupCol[LOOKUP_COL_LEN+1];

		Clookup(char *tblName, char *colName);

};  // Clookup

// Clookup2 class
class Clookup2 : public wxTable
{
	public:

		char lookupCol1[LOOKUP_COL_LEN+1];
		char lookupCol2[LOOKUP_COL_LEN+1];

		Clookup2(char *tblName, char *colName1, char *colName2, wxDB *pDb);

};  // Clookup2

class ClookUpDlg : public wxDialog
{
	private:
		bool			 widgetPtrsSet;
		int			 currentCursor;
		Clookup		*lookup;
		Clookup2		*lookup2;
		int			 noDisplayCols;
		int			 col1Len;

		wxListBox	*pLookUpSelectList;
		wxButton		*pLookUpOkBtn;
		wxButton		*pLookUpCancelBtn;

	public:

		// This is a generic lookup constructor that will work with any table and any column
		ClookUpDlg(wxWindow	*parent,
					  char		*windowTitle,
					  char		*tableName,
					  char		*colName,
					  char		*where,
					  char		*orderBy);

		//
		// This is a generic lookup constructor that will work with any table and any column.
		// It extends the capabilites of the lookup dialog in the following ways:
		//
		//	1) 2 columns rather than one
		// 2) The ability to select DISTINCT column values
		//
		// Only set distinctValues equal to true if necessary.  In many cases, the constraints
		// of the index(es) will enforce this uniqueness.  Selecting DISTINCT does require
		// overhead by the database to ensure that all values returned are distinct.  Therefore,
		// use this ONLY when you need it.
		//
		// For complicated queries, you can pass in the sql select statement.  This would be
		// necessary if joins are involved since by default both columns must come from the
		// same table.
		//
		// If you do query by sql statement, you must pass in the maximum length of column1,
		// since it cannot be derived when you query using your own sql statement.
		//
		// The optional database connection can be used if you'd like the lookup class
		// to use a database pointer other than the global READONLY_DB.  This is necessary if
		// records are being saved, but not committed to the db, yet should be included
		// in the lookup window.
		//
		ClookUpDlg(wxWindow	*parent,
					  char		*windowTitle,
					  char		*tableName,
					  char		*dispCol1,					// Must have at least 1 display column
					  char		*dispCol2,					// Optional
					  char		*where,
					  char		*orderBy,
					  bool		 distinctValues,			// e.g. SELECT DISTINCT ...
					  char		*selectStmt = 0,			// If you wish to query by SQLstmt (complicated lookups)
					  int			 maxLenCol1 = 0,			// Mandatory if querying by SQLstmt
					  wxDB			*pDb = READONLY_DB,		// Database connection pointer
					  bool		 allowOk		= TRUE);		// is the OK button enabled

		void		OnCommand(wxWindow& win, wxCommandEvent& event);
		bool		OnClose();
		void		OnActivate(bool) {};  // necessary for hot keys
};

#define LOOKUP_DIALOG                   500

#define LOOKUP_DIALOG_SELECT            501
#define LOOKUP_DIALOG_OK                502
#define LOOKUP_DIALOG_CANCEL            503

#endif  // LISTDB_DOT_H

// ************************************ listdb.h *********************************