customersform.pas

功能全面的商业财会系统源码,清晰,很有参考价值.扩展性强.

unit CustomersForm;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  DBCtrls, Grids, DBGrids, DB, DBTables, Menus, ExtCtrls, StdCtrls, Buttons, BDE, SHELLAPI;

type
  TfrmCustomers = class(TForm)
    Panel1: TPanel;
    MainMenu1: TMainMenu;
    tblCustomer: TTable;
    dsCustomer: TDataSource;
    DBGrid1: TDBGrid;
    cboFind: TComboBox;
    Label1: TLabel;
    mnuFile: TMenuItem;
    mnuView: TMenuItem;
    mnuHelp: TMenuItem;
    mnuFilter: TMenuItem;
    mnuSortBy: TMenuItem;
    N1: TMenuItem;
    mnuRefresh: TMenuItem;
    mnuCustomersHelp: TMenuItem;
    mnuPrint: TMenuItem;
    N2: TMenuItem;
    mnuExit: TMenuItem;
    Bevel1: TBevel;
    mnuSortName: TMenuItem;
    mnuSortCustomerNo: TMenuItem;
    mnuSortBalance: TMenuItem;
    mnuSortPhone: TMenuItem;
    mnuSortContact: TMenuItem;
    mnuInvoices: TMenuItem;
    mnuPayments: TMenuItem;
    N4: TMenuItem;
    btnNew: TSpeedButton;
    btnEdit: TSpeedButton;
    btnDelete: TSpeedButton;
    editFind: TEdit;
    mnuRecords: TMenuItem;
    mnuNew: TMenuItem;
    mnuEdit: TMenuItem;
    mnuDelete: TMenuItem;
    qryCustomer: TQuery;
    tblCContact: TTable;
    qryCustomerCustomerID: TIntegerField;
    qryCustomerCustomerNo: TStringField;
    qryCustomerCustomerName: TStringField;
    qryCustomerContact: TStringField;
    qryCustomerPhone: TStringField;
    qryCustomerBalance: TCurrencyField;
    tblCustomerCustomerID: TAutoIncField;
    tblCustomerCustomerNo: TStringField;
    tblCustomerCustomerName: TStringField;
    tblCContactCustomerID: TIntegerField;
    qryCustomerSuspended: TBooleanField;
    qryCustomerCurrencyID: TIntegerField;
    tblCustomerCurrencyID: TIntegerField;
    tblCustomerSuspended: TBooleanField;
    PopupMenu1: TPopupMenu;
    popNew: TMenuItem;
    popEdit: TMenuItem;
    popDelete: TMenuItem;
    N3: TMenuItem;
    popInvoices: TMenuItem;
    popPayments: TMenuItem;
    popPhone: TMenuItem;
    N5: TMenuItem;
    tblCBalance: TTable;
    tblCBalanceCustomerID: TIntegerField;
    tblARInv: TTable;
    tblARInvCustomerID: TIntegerField;
    tblARInvBillToID: TIntegerField;
    popEMail: TMenuItem;
    qryCustomerEMail: TStringField;
    btnFilter: TSpeedButton;
    procedure mnuRefreshClick(Sender: TObject);
    procedure tblCustomerBeforeDelete(DataSet: TDataSet);
    procedure FormCreate(Sender: TObject);
    procedure Panel1DblClick(Sender: TObject);
    procedure cboFindDropDown(Sender: TObject);
    procedure cboFindKeyDown(Sender: TObject; var Key: Word;
      Shift: TShiftState);
    procedure cboFindClick(Sender: TObject);
    procedure cboFindKeyPress(Sender: TObject; var Key: Char);
    procedure tblCustomerAfterDelete(DataSet: TDataSet);
    procedure DBGrid1KeyPress(Sender: TObject; var Key: Char);
    procedure FormShow(Sender: TObject);
    procedure editFindKeyPress(Sender: TObject; var Key: Char);
    procedure mnuNewClick(Sender: TObject);
    procedure mnuEditClick(Sender: TObject);
    procedure mnuDeleteClick(Sender: TObject);
    procedure mnuExitClick(Sender: TObject);
    procedure mnuSortCustomerNoClick(Sender: TObject);
    procedure mnuSortNameClick(Sender: TObject);
    procedure mnuSortPhoneClick(Sender: TObject);
    procedure mnuSortContactClick(Sender: TObject);
    procedure mnuSortBalanceClick(Sender: TObject);
    procedure FormResize(Sender: TObject);
    procedure mnuFilterClick(Sender: TObject);
    procedure qryCustomerFilterRecord(DataSet: TDataSet;
      var Accept: Boolean);
    procedure tblCustomerFilterRecord(DataSet: TDataSet;
      var Accept: Boolean);
    procedure mnuPrintClick(Sender: TObject);
    procedure mnuInvoicesClick(Sender: TObject);
    procedure mnuPaymentsClick(Sender: TObject);
    procedure popPhoneClick(Sender: TObject);
    procedure mnuCustomersHelpClick(Sender: TObject);
    procedure popEMailClick(Sender: TObject);
    procedure dsCustomerDataChange(Sender: TObject; Field: TField);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  frmCustomers: TfrmCustomers;
  
implementation

uses BS1Form, CustomerForm, CustomersFilterForm, CustomersReport,
  DialerForm, ARInvoicesForm, ARInvoicesFilterForm, ARPaymentsForm,
  ARPaymentsFilterForm;

var
  intClientHeight, intClientWidth: Integer;
  cboFind_CustomerIDs: TStringList;
  OldWindowState: TWindowState;

{$R *.DFM}

procedure cboFind_Load(const Tbl: TTable; const Cbo: TCombobox);
begin
  Cbo.Items.Clear;   //Populate "find" combobox.
  cboFind_CustomerIDs.Clear;
  Tbl.First;
  while not Tbl.EOF do begin
    Cbo.Items.Add(Tbl['CustomerName']);
    cboFind_CustomerIDs.Add(Tbl['CustomerID']);
    Tbl.Next;
  end;
  frmCustomers_cboFind_RequeryRequired := false;
end;

procedure TfrmCustomers.mnuRefreshClick(Sender: TObject);
var
  Bookmark: TBookmark;
begin
  screen.cursor := crHourglass;
  Bookmark := qryCustomer.GetBookmark;
  with qryCustomer do begin close; open; end;   //Refresh.
  try qryCustomer.GotoBookmark(Bookmark); except; end;
  qryCustomer.FreeBookmark(BookMark);
  screen.cursor := crDefault;
end;

procedure TfrmCustomers.tblCustomerBeforeDelete(DataSet: TDataSet);
begin
  if MessageDlg('Delete ' + '''' + tblCustomerCustomerNo.AsString + ': ' + tblCustomerCustomerName.AsString + '''' + '?',mtConfirmation,mbOKCancel,0) <> mrOK then raise(EAbort.create(''));   //Silent Exception: "abort;" replaced by "raise etc" since abort conflicts with BDE (required by DbiSaveChanges).
  repaint;
  
  tblARInv.Active := true;
  if tblARInv.Locate('CustomerID', tblCustomerCustomerID.value, []) = true then raise(Exception.Create('Unable to delete ' + '''' + tblCustomerCustomerNo.AsString + ': ' + tblCustomerCustomerName.AsString + '''' + '...' + #13 + 'Invoice(s) exist for this ship-to'));
  if tblARInv.Locate('BillToID', tblCustomerCustomerID.value, []) = true then raise(Exception.Create('Unable to delete ' + '''' + tblCustomerCustomerNo.AsString + ': ' + tblCustomerCustomerName.AsString + '''' + '...' + #13 + 'Invoice(s) exist for this bill-to'));

  tblCBalance.Active := true;   //Delete balance.
  if tblCBalance.Locate('CustomerID', tblCustomerCustomerID.value, []) = true then tblCBalance.Delete;

  with tblCContact do begin   //Delete contacts for this customer.
    Active := true;
    First;
    while not eof do Delete;
  end;
end;

procedure TfrmCustomers.FormCreate(Sender: TObject);
var
  x: integer;
begin
  qryCustomer.DatabaseName := strDatabaseName;
  tblCustomer.DatabaseName := strDatabaseName;
  tblCBalance.DatabaseName := strDatabaseName;
  tblCContact.DatabaseName := strDatabaseName;
  tblARInv.DatabaseName := strDatabaseName;
  qryCustomer.Active := true;
  tblCustomer.Active := true;
  //tblCBalance.Active := true;   ...pospone until required (delete).
  //tblCContact.Active := true;   ...pospone until required (delete).
  //tblARInv.Active := true;   ...pospone until required (delete).

  cboFind_CustomerIDs := TStringList.create;   //Create a TStringList to store CustomerIDs for the "find" combobox.
  cboFind_Load(tblCustomer, cboFind);   //Populate "find" combobox.

  if FontFactor <> 1 then begin   //If using large fonts, resize grid columns.
    intClientWidth := Trunc(20*FontFactor) + DBGrid1.Columns.Count -1;   //Scrollbar + grid lines.
    for x := 0 to DBGrid1.Columns.Count - 1 do begin
      DBGrid1.Columns[x].width := Trunc(DBGrid1.Columns[x].width*FontFactor);
      intClientWidth := intClientWidth + DBGrid1.Columns[x].width;
    end;
    ClientWidth := intClientWidth;
  end;
  intClientHeight := ClientHeight;   //Store form size.
  intClientWidth := ClientWidth;
end;

procedure TfrmCustomers.Panel1DblClick(Sender: TObject);
begin
  ClientHeight := intClientHeight;   //Resize form.
  ClientWidth := intClientWidth;
end;

procedure TfrmCustomers.cboFindDropDown(Sender: TObject);
begin
  if frmCustomers_cboFind_RequeryRequired = true then cboFind_Load(tblCustomer, cboFind);   //Populate "find" combobox.
end;

procedure TfrmCustomers.cboFindKeyDown(Sender: TObject; var Key: Word;
  Shift: TShiftState);
begin
  if frmCustomers_cboFind_RequeryRequired = true then cboFind_Load(tblCustomer, cboFind);   //Populate "find" combobox.
end;

procedure TfrmCustomers.cboFindClick(Sender: TObject);
begin
  if cboFind.Text = '' then exit;
  editFind.text := '';
  if cboFind.Items.IndexOf(cboFind.Text) < 0 then raise(Exception.Create('Choose an item from the list'));
  if qryCustomer.Locate('CustomerID', cboFind_CustomerIDs[cboFind.ItemIndex], []) <> true then raise(Exception.Create('''' + cboFind.Text + '''' + ' not found'));
end;

procedure TfrmCustomers.cboFindKeyPress(Sender: TObject; var Key: Char);
begin
  if key = #13 then begin
    Key := #0;   //Cancel Enter key.
    if (cboFind.Text = '') or (cboFind.Text = '<Customer name>') then begin
      Perform(WM_NEXTDLGCTL, 0, 0);   //Advance to next control.
      exit;
    end;
    cboFindClick(Sender);   //Trigger click event (in case partial text was entered then combobox opened: item would show as selected, but Enter wouldn't process it).
    Perform(WM_NEXTDLGCTL, 0, 0);   //Advance to next control.
  end;
end;

procedure TfrmCustomers.tblCustomerAfterDelete(DataSet: TDataSet);
begin
  frmCustomers_cboFind_RequeryRequired := true;
  frmARInvoices_cboFindCustomer_RequeryRequired := true;
  frmARPayments_cboFindCustomer_RequeryRequired := true;
  cboFind.text := '';
end;

procedure TfrmCustomers.DBGrid1KeyPress(Sender: TObject; var Key: Char);
begin
  if key = #13 then begin
    mnuEditClick(Sender);
    Key := #0;   //Cancel Enter key.
  end;
end;

procedure TfrmCustomers.FormShow(Sender: TObject);
begin
  cboFind.ItemIndex := 0;   //Reset selected item to 1st (so down arrow scrolls from start).
  cboFind.text := '<Customer name>';   //Clear selection.
  editFind.text := '<Cust. no.>';
  editFind.setfocus;
  editFind.SelectAll;
  qryCustomer.First;   //Reset grid to start at 1st record.