[wxWidgets.git] / samples / db / listdb.cpp

///////////////////////////////////////////////////////////////////////////////
// Name:        listdb.cpp
// Purpose:     Data table lookup listbox code
// Author:      George Tasker/Doug Card
// Modified by:
// Created:     1996
// RCS-ID:      $Id$
// Copyright:   (c) 1996 Remstar International, Inc.
// Licence:     wxWindows licence
///////////////////////////////////////////////////////////////////////////////

/*
// SYNOPSIS START

    Member functions for the classes defined in LISTDB.H

	 This class is used to present a generic ListBox lookup window for
	 use with any of the object creation/selection choice widgets.   This 
	 dialog window will present a (possibly) scrolling list of values
	 that come from a data table source.  Based on the object type passed
	 in the constructor, a ListBox is built to present the user with a
	 single selection listbox.

	 The string selected from the list box is stored in the Global variable
	 "ListDB_Seclection", and will remain set until another interation of this
	 routine is called.

	 For each object (database) type that is to be used, an overridden
	 constructor should be written to appropriately link to the proper
	 data table/object for building the list.
	   
    The data table record access is all handled through the routines
    in this module, interfacing with the methods defined in wxTable.

	 All objects which use data table access must be initialized and
	 have opened the table prior to passing them in the dialog
	 constructor, and the 'where' query should already have been set
	 and performed before creating this dialog instance.
    
// SYNOPSIS STOP
*/

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

#include  "wx/wxprec.h"

#ifdef    __BORLANDC__
#pragma hdrstop
#endif  //__BORLANDC__

#ifndef WX_PRECOMP
#include  <wx/wx.h>
#endif //WX_PRECOMP

#include <wx/dbtable.h>

extern DbList WXDLLEXPORT *PtrBegDbList;    /* from db.cpp, used in getting back error results from db connections */

#include "listdb.h"

// Global structure for holding ODBC connection information
extern DbStuff DbConnectInf;

// Global database connection
extern wxDB *READONLY_DB;


// Used for passing the selected listbox selection back to the calling
// routine.  This variable must be declared as 'extern' in the calling
// source module
char ListDB_Selection[LOOKUP_COL_LEN+1];

// If the listbox contains two columns of data, the second column is
// returned in this variable.
char ListDB_Selection2[LOOKUP_COL_LEN+1];

// Constants
const int LISTDB_NO_SPACES_BETWEEN_COLS = 3;


/*
 * This function will return the exact string(s) from the database engine
 * indicating all error conditions which have just occured during the
 * last call to the database engine.
 *
 * This demo uses the returned string by displaying it in a wxMessageBox.  The
 * formatting therefore is not the greatest, but this is just a demo, not a
 * finished product.  :-) gt
 *
 * NOTE: The value returned by this function is for temporary use only and
 *       should be copied for long term use
 */
char *GetExtendedDBErrorMsg2(char *ErrFile, int ErrLine)
{
	static wxString msg;

	wxString tStr;

	if (ErrFile || ErrLine)
	{
		msg += "File: ";
		msg += ErrFile;
		msg += "   Line: ";
		tStr.Printf("%d",ErrLine);
		msg += tStr.GetData();
		msg += "\n";
	}

	msg.Append ("\nODBC errors:\n");
	msg += "\n";
	
	/* Scan through each database connection displaying 
	 * any ODBC errors that have occured. */
	for (DbList *pDbList = PtrBegDbList; pDbList; pDbList = pDbList->PtrNext)
	{
		// Skip over any free connections
		if (pDbList->Free)
			continue;
		// Display errors for this connection
		for (int i = 0; i < DB_MAX_ERROR_HISTORY; i++)
		{
			if (pDbList->PtrDb->errorList[i])
			{
				msg.Append(pDbList->PtrDb->errorList[i]);
				if (strcmp(pDbList->PtrDb->errorList[i],"") != 0)
					msg.Append("\n");
			}
		}
	}
	msg += "\n";

	return (char*) (const char*) msg;
}  // GetExtendedDBErrorMsg


// Clookup constructor
Clookup::Clookup(char *tblName, char *colName) : wxTable(READONLY_DB, tblName, 1, NULL, !QUERY_ONLY, DbConnectInf.defaultDir)
{

	SetColDefs (0, colName,	DB_DATA_TYPE_VARCHAR, lookupCol,	SQL_C_CHAR, LOOKUP_COL_LEN+1, FALSE, FALSE);

}  // Clookup()


// Clookup2 constructor
Clookup2::Clookup2(char *tblName, char *colName1, char *colName2, wxDB *pDb)
   : wxTable(pDb, tblName, (1 + (strlen(colName2) > 0)), NULL, !QUERY_ONLY, DbConnectInf.defaultDir)
{
	int i = 0;

	SetColDefs (i, colName1, DB_DATA_TYPE_VARCHAR, lookupCol1,	SQL_C_CHAR, LOOKUP_COL_LEN+1, FALSE, FALSE);

	if (strlen(colName2) > 0)
		SetColDefs (++i, colName2, DB_DATA_TYPE_VARCHAR, lookupCol2,	SQL_C_CHAR, LOOKUP_COL_LEN+1, FALSE, FALSE);

}  // Clookup2()


BEGIN_EVENT_TABLE(ClookUpDlg, wxDialog)
//	 EVT_LISTBOX(LOOKUP_DIALOG_SELECT, ClookUpDlg::SelectCallback)
    EVT_BUTTON(LOOKUP_DIALOG_OK,  ClookUpDlg::OnButton)
    EVT_BUTTON(LOOKUP_DIALOG_CANCEL,  ClookUpDlg::OnButton)
    EVT_CLOSE(ClookUpDlg::OnClose)
END_EVENT_TABLE()

// This is a generic lookup constructor that will work with any table and any column
ClookUpDlg::ClookUpDlg(wxWindow *parent, char *windowTitle, char *tableName, char *colName,
	char *where, char *orderBy)  : wxDialog (parent, LOOKUP_DIALOG, "Select...", wxPoint(-1, -1), wxSize(400, 290))
{
	wxBeginBusyCursor();
	
	strcpy(ListDB_Selection,"");
	widgetPtrsSet = FALSE;
	lookup  = 0;
	lookup2 = 0;
	noDisplayCols = 1;
	col1Len = 0;

	pLookUpSelectList		= new wxListBox(this, LOOKUP_DIALOG_SELECT, wxPoint(5, 15), wxSize(384, 195), 0, 0, wxLB_SINGLE|wxLB_ALWAYS_SB, wxDefaultValidator, "LookUpSelectList");
	pLookUpOkBtn			= new wxButton(this, LOOKUP_DIALOG_OK, "&Ok",		wxPoint(113, 222), wxSize(70, 35), 0, wxDefaultValidator, "LookUpOkBtn");
	pLookUpCancelBtn		= new wxButton(this, LOOKUP_DIALOG_CANCEL, "C&ancel",	wxPoint(212, 222), wxSize(70, 35), 0, wxDefaultValidator, "LookUpCancelBtn");

	widgetPtrsSet = TRUE;

	// Query the lookup table and display the result set
	if (!(lookup = new Clookup(tableName, colName)))
	{
		wxMessageBox("Error allocating memory for 'Clookup'object.","Error...");
		Close();
		return;
	}

	if (!lookup->Open())
	{
		wxString tStr;
		tStr.Printf("Unable to open the table '%s'.",tableName);
		wxMessageBox(tStr,"ODBC Error...");
		Close();
		return;
	}

	lookup->orderBy = orderBy;
	lookup->where = where;
	if (!lookup->Query())
	{
		wxMessageBox("ODBC error during Query()","ODBC Error...");
		Close();
		return;
	}

	// Fill in the list box from the query result set
	while (lookup->GetNext())
		pLookUpSelectList->Append(lookup->lookupCol);

	// Highlight the first list item
	pLookUpSelectList->SetSelection(0);

	// Make the OK activate by pressing Enter
	if (pLookUpSelectList->Number())
		pLookUpOkBtn->SetDefault();
	else
	{
		pLookUpCancelBtn->SetDefault();
		pLookUpOkBtn->Enable(FALSE);
	}

	// Display the dialog window
	SetTitle(windowTitle);
	Centre(wxBOTH);
	wxEndBusyCursor();
	ShowModal();

}  // Generic lookup constructor


//
// 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 lenght 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::ClookUpDlg(wxWindow *parent, char *windowTitle, char *tableName,
	char *dispCol1, char *dispCol2, char *where, char *orderBy, bool distinctValues,
	char *selectStmt, int maxLenCol1, wxDB *pDb, bool allowOk)  : wxDialog (parent, LOOKUP_DIALOG, "Select...", wxPoint(-1, -1), wxSize(400, 290))
{
	wxBeginBusyCursor();
	
	strcpy(ListDB_Selection,"");
	strcpy(ListDB_Selection2,"");
	widgetPtrsSet = FALSE;
	lookup  = 0;
	lookup2 = 0;
	noDisplayCols = (strlen(dispCol2) ? 2 : 1);
	col1Len = 0;

	wxFont fixedFont(12,wxMODERN,wxNORMAL,wxNORMAL);

	// this is done with fixed font so that the second column (if any) will be left
	// justified in the second column
	pLookUpSelectList		= new wxListBox(this, LOOKUP_DIALOG_SELECT, wxPoint(5, 15), wxSize(384, 195), 0, 0, wxLB_SINGLE|wxLB_ALWAYS_SB, wxDefaultValidator, "LookUpSelectList");

    pLookUpSelectList->SetFont(fixedFont);

	pLookUpOkBtn			= new wxButton(this, LOOKUP_DIALOG_OK, "&Ok",		wxPoint(113, 222), wxSize(70, 35), 0, wxDefaultValidator, "LookUpOkBtn");
	pLookUpCancelBtn		= new wxButton(this, LOOKUP_DIALOG_CANCEL, "C&ancel",	wxPoint(212, 222), wxSize(70, 35), 0, wxDefaultValidator, "LookUpCancelBtn");

	widgetPtrsSet = TRUE;

	// Query the lookup table and display the result set
	if (!(lookup2 = new Clookup2(tableName, dispCol1, dispCol2, pDb)))
	{
		wxMessageBox("Error allocating memory for 'Clookup2'object.","Error...");
		Close();
		return;
	}

	if (!lookup2->Open())
	{
		wxString tStr;
		tStr.Printf("Unable to open the table '%s'.",tableName);
		tStr += GetExtendedDBErrorMsg2(__FILE__,__LINE__);
		wxMessageBox(tStr,"ODBC Error...");
		Close();
		return;
	}

	// If displaying 2 columns, determine the maximum length of column1
	int maxColLen;
	if (maxLenCol1)
		maxColLen = col1Len = maxLenCol1;  // user passed in max col length for column 1
	else
	{
		maxColLen = LOOKUP_COL_LEN;
		if (strlen(dispCol2))
		{
			wxString q = "SELECT MAX({fn LENGTH(";
			q += dispCol1;
			q += ")}), NULL";
			q += " FROM ";
			q += tableName;
			if (strlen(where))
			{
				q += " WHERE ";
				q += where;
			}
			if (!lookup2->QueryBySqlStmt((char*) (const char*) q))
			{
				wxMessageBox("ODBC error during QueryBySqlStmt()","ODBC Error...");
				Close();
				return;
			}
			if (lookup2->GetNext())
				maxColLen = col1Len = atoi(lookup2->lookupCol1);
			else
				wxMessageBox("ODBC error during GetNext()","ODBC Error...");
		}
	}

	// Query the actual record set
	if (selectStmt && strlen(selectStmt))	// Query by sql stmt passed in
	{
		if (!lookup2->QueryBySqlStmt(selectStmt))
		{
			wxMessageBox("ODBC error during QueryBySqlStmt()","ODBC Error...");
			Close();
			return;
		}
	}
	else	// Query using where and order by clauses
	{
		lookup2->orderBy = orderBy;
		lookup2->where = where;
		if (!lookup2->Query(FALSE, distinctValues))
		{
			wxMessageBox("ODBC error during Query()","ODBC Error...");
			Close();
			return;
		}
	}

	// Fill in the list box from the query result set
	wxString s;
	while (lookup2->GetNext())
	{
		s = lookup2->lookupCol1;
		if (strlen(dispCol2))		// Append the optional column 2
		{
			s.Append(' ', (maxColLen + LISTDB_NO_SPACES_BETWEEN_COLS - strlen(lookup2->lookupCol1)));
			s.Append(lookup2->lookupCol2);
		}
		pLookUpSelectList->Append(s);
	}

	// Highlight the first list item
	pLookUpSelectList->SetSelection(0);

	// Make the OK activate by pressing Enter
	if (pLookUpSelectList->Number())
		pLookUpOkBtn->SetDefault();
	else
	{
		pLookUpCancelBtn->SetDefault();
		pLookUpOkBtn->Enable(FALSE);
	}

	pLookUpOkBtn->Enable(allowOk);

	// Display the dialog window
	SetTitle(windowTitle);
	Centre(wxBOTH);
	wxEndBusyCursor();
	ShowModal();

}  // Generic lookup constructor 2


void ClookUpDlg::OnClose(wxCloseEvent& event)
{
	widgetPtrsSet = FALSE;
	GetParent()->Enable(TRUE);

	if (lookup)
		delete lookup;
	if (lookup2)
		delete lookup2;

	while (wxIsBusy()) wxEndBusyCursor();
   event.Skip();

//	return TRUE;

}  // ClookUpDlg::OnClose


void ClookUpDlg::OnButton( wxCommandEvent &event )
{
  wxWindow *win = (wxWindow*) event.GetEventObject();
  OnCommand( *win, event );
}


void ClookUpDlg::OnCommand(wxWindow& win, wxCommandEvent& event)
{
	wxString widgetName = win.GetName();

	if (widgetPtrsSet)
	{
		// OK Button
		if (widgetName == pLookUpOkBtn->GetName())
		{
			if (pLookUpSelectList->GetSelection() != -1)
			{
				if (noDisplayCols == 1)
					strcpy (ListDB_Selection, pLookUpSelectList->GetStringSelection());
				else  // 2 display columns
				{
					wxString s = pLookUpSelectList->GetStringSelection();
					// Column 1
					s = s.SubString(0, col1Len-1);
					s = s.Strip();
					strcpy(ListDB_Selection, s);
					// Column 2
					s = pLookUpSelectList->GetStringSelection();
					s = s.Mid(col1Len + LISTDB_NO_SPACES_BETWEEN_COLS);
					s = s.Strip();
					strcpy(ListDB_Selection2, s);
				}
			}
			else
			{
				strcpy(ListDB_Selection,"");
				strcpy(ListDB_Selection2,"");
			}
			Close();
		}  // OK Button

		// Cancel Button
		if (widgetName == pLookUpCancelBtn->GetName())
		{
			strcpy (ListDB_Selection,"");
			strcpy (ListDB_Selection2,"");
			Close();
		}  // Cancel Button
	}

};  // ClookUpDlg::OnCommand

// *********************************** listdb.cpp **********************************
Commit	Line	Data
108106cf JS	1	///////////////////////////////////////////////////////////////////////////////
	2	// Name: listdb.cpp
	3	// Purpose: Data table lookup listbox code
	4	// Author: George Tasker/Doug Card
	5	// Modified by:
	6	// Created: 1996
	7	// RCS-ID: $Id$
	8	// Copyright: (c) 1996 Remstar International, Inc.
	9	// Licence: wxWindows licence
	10	///////////////////////////////////////////////////////////////////////////////
	11
	12	/*
	13	// SYNOPSIS START
	14
	15	Member functions for the classes defined in LISTDB.H
	16
	17	This class is used to present a generic ListBox lookup window for
	18	use with any of the object creation/selection choice widgets. This
	19	dialog window will present a (possibly) scrolling list of values
	20	that come from a data table source. Based on the object type passed
	21	in the constructor, a ListBox is built to present the user with a
	22	single selection listbox.
	23
	24	The string selected from the list box is stored in the Global variable
	25	"ListDB_Seclection", and will remain set until another interation of this
	26	routine is called.
	27
	28	For each object (database) type that is to be used, an overridden
	29	constructor should be written to appropriately link to the proper
	30	data table/object for building the list.
	31
	32	The data table record access is all handled through the routines
	33	in this module, interfacing with the methods defined in wxTable.
	34
	35	All objects which use data table access must be initialized and
	36	have opened the table prior to passing them in the dialog
	37	constructor, and the 'where' query should already have been set
	38	and performed before creating this dialog instance.
	39
	40	// SYNOPSIS STOP
	41	*/
	42
	43	#ifdef __GNUG__
	44	#pragma implementation "listdb.h"
	45	#endif
	46
	47	#include "wx/wxprec.h"
	48
	49	#ifdef __BORLANDC__
	50	#pragma hdrstop
	51	#endif //__BORLANDC__
	52
	53	#ifndef WX_PRECOMP
	54	#include <wx/wx.h>
	55	#endif //WX_PRECOMP
	56
	57	#include <wx/dbtable.h>
	58
870ff2b1	59	extern DbList WXDLLEXPORT PtrBegDbList; / from db.cpp, used in getting back error results from db connections */
65d7ddc4	60
108106cf JS	61	#include "listdb.h"
	62
	63	// Global structure for holding ODBC connection information
	64	extern DbStuff DbConnectInf;
	65
	66	// Global database connection
	67	extern wxDB *READONLY_DB;
	68
	69
	70	// Used for passing the selected listbox selection back to the calling
	71	// routine. This variable must be declared as 'extern' in the calling
	72	// source module
	73	char ListDB_Selection[LOOKUP_COL_LEN+1];
	74
	75	// If the listbox contains two columns of data, the second column is
	76	// returned in this variable.
	77	char ListDB_Selection2[LOOKUP_COL_LEN+1];
	78
	79	// Constants
5b077d48	80	const int LISTDB_NO_SPACES_BETWEEN_COLS = 3;
108106cf JS	81
108106cf JS	82
65d7ddc4 GT	83
	84	/*
	85	* This function will return the exact string(s) from the database engine
	86	* indicating all error conditions which have just occured during the
	87	* last call to the database engine.
	88	*
	89	* This demo uses the returned string by displaying it in a wxMessageBox. The
	90	* formatting therefore is not the greatest, but this is just a demo, not a
	91	* finished product. :-) gt
	92	*
	93	* NOTE: The value returned by this function is for temporary use only and
	94	* should be copied for long term use
	95	*/
	96	char GetExtendedDBErrorMsg2(char ErrFile, int ErrLine)
	97	{
	98	static wxString msg;
	99
	100	wxString tStr;
	101
	102	if (ErrFile \|\| ErrLine)
	103	{
	104	msg += "File: ";
	105	msg += ErrFile;
	106	msg += " Line: ";
	107	tStr.Printf("%d",ErrLine);
	108	msg += tStr.GetData();
	109	msg += "\n";
	110	}
	111
	112	msg.Append ("\nODBC errors:\n");
	113	msg += "\n";
	114
	115	/* Scan through each database connection displaying
	116	* any ODBC errors that have occured. */
	117	for (DbList *pDbList = PtrBegDbList; pDbList; pDbList = pDbList->PtrNext)
	118	{
	119	// Skip over any free connections
	120	if (pDbList->Free)
	121	continue;
	122	// Display errors for this connection
	123	for (int i = 0; i < DB_MAX_ERROR_HISTORY; i++)
	124	{
	125	if (pDbList->PtrDb->errorList[i])
	126	{
	127	msg.Append(pDbList->PtrDb->errorList[i]);
	128	if (strcmp(pDbList->PtrDb->errorList[i],"") != 0)
	129	msg.Append("\n");
	130	}
	131	}
	132	}
	133	msg += "\n";
	134
	135	return (char) (const char) msg;
	136	} // GetExtendedDBErrorMsg
	137
	138
	139
108106cf	140	// Clookup constructor
65d7ddc4	141	Clookup::Clookup(char tblName, char colName) : wxTable(READONLY_DB, tblName, 1, NULL, !QUERY_ONLY, DbConnectInf.defaultDir)
108106cf JS	142	{
	143
	144	SetColDefs (0, colName, DB_DATA_TYPE_VARCHAR, lookupCol, SQL_C_CHAR, LOOKUP_COL_LEN+1, FALSE, FALSE);
	145
	146	} // Clookup()
	147
	148
	149	// Clookup2 constructor
	150	Clookup2::Clookup2(char tblName, char colName1, char colName2, wxDB pDb)
65d7ddc4	151	: wxTable(pDb, tblName, (1 + (strlen(colName2) > 0)), NULL, !QUERY_ONLY, DbConnectInf.defaultDir)
108106cf JS	152	{
	153	int i = 0;
	154
	155	SetColDefs (i, colName1, DB_DATA_TYPE_VARCHAR, lookupCol1, SQL_C_CHAR, LOOKUP_COL_LEN+1, FALSE, FALSE);
	156
	157	if (strlen(colName2) > 0)
	158	SetColDefs (++i, colName2, DB_DATA_TYPE_VARCHAR, lookupCol2, SQL_C_CHAR, LOOKUP_COL_LEN+1, FALSE, FALSE);
	159
	160	} // Clookup2()
	161
	162
65d7ddc4 GT	163	BEGIN_EVENT_TABLE(ClookUpDlg, wxDialog)
	164	// EVT_LISTBOX(LOOKUP_DIALOG_SELECT, ClookUpDlg::SelectCallback)
	165	EVT_BUTTON(LOOKUP_DIALOG_OK, ClookUpDlg::OnButton)
	166	EVT_BUTTON(LOOKUP_DIALOG_CANCEL, ClookUpDlg::OnButton)
	167	EVT_CLOSE(ClookUpDlg::OnClose)
	168	END_EVENT_TABLE()
	169
108106cf JS	170	// This is a generic lookup constructor that will work with any table and any column
108106cf JS	171	ClookUpDlg::ClookUpDlg(wxWindow parent, char windowTitle, char tableName, char colName,
1fc5dd6f	172	char where, char orderBy) : wxDialog (parent, LOOKUP_DIALOG, "Select...", wxPoint(-1, -1), wxSize(400, 290))
108106cf JS	173	{
	174	wxBeginBusyCursor();
	175
	176	strcpy(ListDB_Selection,"");
	177	widgetPtrsSet = FALSE;
	178	lookup = 0;
	179	lookup2 = 0;
	180	noDisplayCols = 1;
	181	col1Len = 0;
	182
1fc5dd6f JS	183	pLookUpSelectList = new wxListBox(this, LOOKUP_DIALOG_SELECT, wxPoint(5, 15), wxSize(384, 195), 0, 0, wxLB_SINGLE\|wxLB_ALWAYS_SB, wxDefaultValidator, "LookUpSelectList");
	184	pLookUpOkBtn = new wxButton(this, LOOKUP_DIALOG_OK, "&Ok", wxPoint(113, 222), wxSize(70, 35), 0, wxDefaultValidator, "LookUpOkBtn");
	185	pLookUpCancelBtn = new wxButton(this, LOOKUP_DIALOG_CANCEL, "C&ancel", wxPoint(212, 222), wxSize(70, 35), 0, wxDefaultValidator, "LookUpCancelBtn");
108106cf JS	186
	187	widgetPtrsSet = TRUE;
	188
	189	// Query the lookup table and display the result set
	190	if (!(lookup = new Clookup(tableName, colName)))
	191	{
	192	wxMessageBox("Error allocating memory for 'Clookup'object.","Error...");
	193	Close();
	194	return;
	195	}
	196
	197	if (!lookup->Open())
	198	{
	199	wxString tStr;
1fc5dd6f JS	200	tStr.Printf("Unable to open the table '%s'.",tableName);
1fc5dd6f JS	201	wxMessageBox(tStr,"ODBC Error...");
108106cf JS	202	Close();
	203	return;
	204	}
	205
	206	lookup->orderBy = orderBy;
	207	lookup->where = where;
	208	if (!lookup->Query())
	209	{
	210	wxMessageBox("ODBC error during Query()","ODBC Error...");
	211	Close();
	212	return;
	213	}
	214
	215	// Fill in the list box from the query result set
	216	while (lookup->GetNext())
	217	pLookUpSelectList->Append(lookup->lookupCol);
	218
	219	// Highlight the first list item
	220	pLookUpSelectList->SetSelection(0);
	221
	222	// Make the OK activate by pressing Enter
	223	if (pLookUpSelectList->Number())
	224	pLookUpOkBtn->SetDefault();
	225	else
	226	{
	227	pLookUpCancelBtn->SetDefault();
	228	pLookUpOkBtn->Enable(FALSE);
	229	}
	230
	231	// Display the dialog window
	232	SetTitle(windowTitle);
	233	Centre(wxBOTH);
	234	wxEndBusyCursor();
1fc5dd6f	235	ShowModal();
108106cf JS	236
	237	} // Generic lookup constructor
	238
	239
	240	//
	241	// This is a generic lookup constructor that will work with any table and any column.
	242	// It extends the capabilites of the lookup dialog in the following ways:
	243	//
	244	// 1) 2 columns rather than one
	245	// 2) The ability to select DISTINCT column values
	246	//
	247	// Only set distinctValues equal to true if necessary. In many cases, the constraints
	248	// of the index(es) will enforce this uniqueness. Selecting DISTINCT does require
	249	// overhead by the database to ensure that all values returned are distinct. Therefore,
	250	// use this ONLY when you need it.
	251	//
	252	// For complicated queries, you can pass in the sql select statement. This would be
	253	// necessary if joins are involved since by default both columns must come from the
	254	// same table.
	255	//
	256	// If you do query by sql statement, you must pass in the maximum lenght of column1,
	257	// since it cannot be derived when you query using your own sql statement.
	258	//
	259	// The optional database connection can be used if you'd like the lookup class
	260	// to use a database pointer other than the global READONLY_DB. This is necessary if
	261	// records are being saved, but not committed to the db, yet should be included
	262	// in the lookup window.
	263	//
	264	ClookUpDlg::ClookUpDlg(wxWindow parent, char windowTitle, char *tableName,
	265	char dispCol1, char dispCol2, char where, char orderBy, bool distinctValues,
1fc5dd6f	266	char selectStmt, int maxLenCol1, wxDB pDb, bool allowOk) : wxDialog (parent, LOOKUP_DIALOG, "Select...", wxPoint(-1, -1), wxSize(400, 290))
108106cf JS	267	{
	268	wxBeginBusyCursor();
	269
	270	strcpy(ListDB_Selection,"");
	271	strcpy(ListDB_Selection2,"");
	272	widgetPtrsSet = FALSE;
	273	lookup = 0;
	274	lookup2 = 0;
	275	noDisplayCols = (strlen(dispCol2) ? 2 : 1);
	276	col1Len = 0;
	277
1fc5dd6f	278	wxFont fixedFont(12,wxMODERN,wxNORMAL,wxNORMAL);
108106cf JS	279
	280	// this is done with fixed font so that the second column (if any) will be left
	281	// justified in the second column
1fc5dd6f JS	282	pLookUpSelectList = new wxListBox(this, LOOKUP_DIALOG_SELECT, wxPoint(5, 15), wxSize(384, 195), 0, 0, wxLB_SINGLE\|wxLB_ALWAYS_SB, wxDefaultValidator, "LookUpSelectList");
	283
	284	pLookUpSelectList->SetFont(fixedFont);
	285
	286	pLookUpOkBtn = new wxButton(this, LOOKUP_DIALOG_OK, "&Ok", wxPoint(113, 222), wxSize(70, 35), 0, wxDefaultValidator, "LookUpOkBtn");
	287	pLookUpCancelBtn = new wxButton(this, LOOKUP_DIALOG_CANCEL, "C&ancel", wxPoint(212, 222), wxSize(70, 35), 0, wxDefaultValidator, "LookUpCancelBtn");
108106cf JS	288
	289	widgetPtrsSet = TRUE;
	290
	291	// Query the lookup table and display the result set
	292	if (!(lookup2 = new Clookup2(tableName, dispCol1, dispCol2, pDb)))
	293	{
	294	wxMessageBox("Error allocating memory for 'Clookup2'object.","Error...");
	295	Close();
	296	return;
	297	}
	298
	299	if (!lookup2->Open())
	300	{
	301	wxString tStr;
1fc5dd6f	302	tStr.Printf("Unable to open the table '%s'.",tableName);
65d7ddc4	303	tStr += GetExtendedDBErrorMsg2(__FILE__,__LINE__);
1fc5dd6f	304	wxMessageBox(tStr,"ODBC Error...");
108106cf JS	305	Close();
	306	return;
	307	}
	308
	309	// If displaying 2 columns, determine the maximum length of column1
	310	int maxColLen;
	311	if (maxLenCol1)
	312	maxColLen = col1Len = maxLenCol1; // user passed in max col length for column 1
	313	else
	314	{
	315	maxColLen = LOOKUP_COL_LEN;
	316	if (strlen(dispCol2))
	317	{
	318	wxString q = "SELECT MAX({fn LENGTH(";
	319	q += dispCol1;
	320	q += ")}), NULL";
	321	q += " FROM ";
	322	q += tableName;
	323	if (strlen(where))
	324	{
	325	q += " WHERE ";
	326	q += where;
	327	}
1fc5dd6f	328	if (!lookup2->QueryBySqlStmt((char) (const char) q))
108106cf JS	329	{
	330	wxMessageBox("ODBC error during QueryBySqlStmt()","ODBC Error...");
	331	Close();
	332	return;
	333	}
	334	if (lookup2->GetNext())
	335	maxColLen = col1Len = atoi(lookup2->lookupCol1);
	336	else
	337	wxMessageBox("ODBC error during GetNext()","ODBC Error...");
	338	}
	339	}
	340
	341	// Query the actual record set
	342	if (selectStmt && strlen(selectStmt)) // Query by sql stmt passed in
	343	{
	344	if (!lookup2->QueryBySqlStmt(selectStmt))
	345	{
	346	wxMessageBox("ODBC error during QueryBySqlStmt()","ODBC Error...");
	347	Close();
	348	return;
	349	}
	350	}
	351	else // Query using where and order by clauses
	352	{
	353	lookup2->orderBy = orderBy;
	354	lookup2->where = where;
	355	if (!lookup2->Query(FALSE, distinctValues))
	356	{
	357	wxMessageBox("ODBC error during Query()","ODBC Error...");
	358	Close();
	359	return;
	360	}
	361	}
	362
	363	// Fill in the list box from the query result set
	364	wxString s;
	365	while (lookup2->GetNext())
	366	{
	367	s = lookup2->lookupCol1;
	368	if (strlen(dispCol2)) // Append the optional column 2
	369	{
	370	s.Append(' ', (maxColLen + LISTDB_NO_SPACES_BETWEEN_COLS - strlen(lookup2->lookupCol1)));
	371	s.Append(lookup2->lookupCol2);
	372	}
1fc5dd6f	373	pLookUpSelectList->Append(s);
108106cf JS	374	}
	375
	376	// Highlight the first list item
	377	pLookUpSelectList->SetSelection(0);
	378
	379	// Make the OK activate by pressing Enter
	380	if (pLookUpSelectList->Number())
	381	pLookUpOkBtn->SetDefault();
	382	else
	383	{
	384	pLookUpCancelBtn->SetDefault();
	385	pLookUpOkBtn->Enable(FALSE);
	386	}
	387
	388	pLookUpOkBtn->Enable(allowOk);
	389
	390	// Display the dialog window
	391	SetTitle(windowTitle);
	392	Centre(wxBOTH);
	393	wxEndBusyCursor();
1fc5dd6f	394	ShowModal();
108106cf JS	395
	396	} // Generic lookup constructor 2
	397
	398
65d7ddc4	399	void ClookUpDlg::OnClose(wxCloseEvent& event)
108106cf JS	400	{
	401	widgetPtrsSet = FALSE;
	402	GetParent()->Enable(TRUE);
	403
	404	if (lookup)
	405	delete lookup;
	406	if (lookup2)
	407	delete lookup2;
	408
e3baecd7	409	while (wxIsBusy()) wxEndBusyCursor();
65d7ddc4 GT	410	event.Skip();
	411
	412	// return TRUE;
108106cf JS	413
	414	} // ClookUpDlg::OnClose
	415
	416
65d7ddc4 GT	417	void ClookUpDlg::OnButton( wxCommandEvent &event )
	418	{
	419	wxWindow win = (wxWindow) event.GetEventObject();
	420	OnCommand( *win, event );
	421	}
	422
	423
108106cf JS	424	void ClookUpDlg::OnCommand(wxWindow& win, wxCommandEvent& event)
	425	{
	426	wxString widgetName = win.GetName();
	427
	428	if (widgetPtrsSet)
	429	{
	430	// OK Button
	431	if (widgetName == pLookUpOkBtn->GetName())
	432	{
	433	if (pLookUpSelectList->GetSelection() != -1)
	434	{
	435	if (noDisplayCols == 1)
	436	strcpy (ListDB_Selection, pLookUpSelectList->GetStringSelection());
	437	else // 2 display columns
	438	{
	439	wxString s = pLookUpSelectList->GetStringSelection();
	440	// Column 1
	441	s = s.SubString(0, col1Len-1);
	442	s = s.Strip();
1fc5dd6f	443	strcpy(ListDB_Selection, s);
108106cf JS	444	// Column 2
108106cf JS	445	s = pLookUpSelectList->GetStringSelection();
1fc5dd6f	446	s = s.Mid(col1Len + LISTDB_NO_SPACES_BETWEEN_COLS);
108106cf	447	s = s.Strip();
1fc5dd6f	448	strcpy(ListDB_Selection2, s);
108106cf JS	449	}
	450	}
	451	else
	452	{
	453	strcpy(ListDB_Selection,"");
	454	strcpy(ListDB_Selection2,"");
	455	}
	456	Close();
	457	} // OK Button
	458
	459	// Cancel Button
	460	if (widgetName == pLookUpCancelBtn->GetName())
	461	{
	462	strcpy (ListDB_Selection,"");
	463	strcpy (ListDB_Selection2,"");
	464	Close();
	465	} // Cancel Button
	466	}
	467
	468	}; // ClookUpDlg::OnCommand
	469
	470	// ********************************* listdb.cpp ********************************