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uprincipal.pas
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uprincipal.pas
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unit uprincipal;
{$mode objfpc}{$H+}
interface
uses
Classes, SysUtils, db, Forms, Controls, Graphics, Dialogs, Menus, StdCtrls,
ulogin, ZConnection, ZDataset, ZSqlUpdate;
type
{ TfrmPrincipal }
TfrmPrincipal = class(TForm)
btnMudaNivel: TButton;
MainMenu1: TMainMenu;
MenuItem1: TMenuItem;
MenuItem10: TMenuItem;
MenuItem11: TMenuItem;
MenuItem12: TMenuItem;
MenuItem13: TMenuItem;
MenuItem14: TMenuItem;
MenuItem15: TMenuItem;
MenuItem16: TMenuItem;
MenuItem17: TMenuItem;
MenuItem18: TMenuItem;
MenuItem19: TMenuItem;
MenuItem2: TMenuItem;
MenuItem20: TMenuItem;
MenuItem21: TMenuItem;
MenuItem22: TMenuItem;
MenuItem23: TMenuItem;
MenuItem24: TMenuItem;
MenuItem25: TMenuItem;
MenuItem3: TMenuItem;
MenuItem4: TMenuItem;
MenuItem5: TMenuItem;
MenuItem6: TMenuItem;
MenuItem7: TMenuItem;
MenuItem8: TMenuItem;
MenuItem9: TMenuItem;
conexao: TZConnection;
ZQuery1: TZQuery;
ZUpdateSQL1: TZUpdateSQL;
procedure btnMudaNivelClick(Sender: TObject);
procedure FormShow(Sender: TObject);
private
procedure CriaDBmenu;
procedure incluiDB(cNOME, cDESCRICAO: string; nNIVEL, nINDICE: integer);
function RetornaNIVEL(cNOME: string): integer;
public
procedure protegemenu(nNIVEL: integer);
end;
var
frmPrincipal: TfrmPrincipal;
implementation
{$R *.lfm}
procedure TfrmPrincipal.FormShow(Sender: TObject);
begin
CriaDBmenu;
frmTelalogin := TfrmTelalogin.Create(self);
try
if frmTelalogin.ShowModal <> mrYes then
begin
Application.Terminate;
end;
finally
FreeAndNil(frmTelalogin);
end;
end;
procedure TfrmPrincipal.btnMudaNivelClick(Sender: TObject);
var
cNIVEL:string;
begin
InputQuery('Controle de Menu','Informe o nível do Usuario',cNIVEL);
protegemenu(StrToIntDef(cNIVEL,1));
end;
procedure TfrmPrincipal.CriaDBmenu;
// varre os itens do menu e chama a funcao para inclusao no banco de dados/
var
nITEM, nPRINCIPAL, nIndice : Integer;
begin
nIndice := 0;
for nPRINCIPAL := 0 to MainMenu1.Items.Count-1 do
begin
incluiDB(MainMenu1.Items[nPRINCIPAL].Name,
MainMenu1.Items[nPRINCIPAL].Caption,
1,
nIndice);
nIndice:= nIndice+1;
for nITEM := 0 to MainMenu1.Items[nPRINCIPAL].Count-1 do
begin
incluiDB(MainMenu1.Items[nPRINCIPAL].Items[nITEM].Name,
' --'+MainMenu1.Items[nPRINCIPAL].Items[nITEM].Caption,
1,
nIndice);
nIndice:= nIndice+1;
end;
end;
end;
procedure TfrmPrincipal.incluiDB(cNOME, cDESCRICAO: string; nNIVEL, nINDICE: integer);
var
qrTMP : TZQuery;
begin
// Faz a inclusão/atualizacao dos itens do menu na base.
// Se o nome existir, atualiza a descricao
qrTMP := TZQuery.Create(self);
qrTMP.Connection:=conexao;
qrTMP.sql.Add('INSERT INTO crt_menu (nome, descricao, nivel, indice)');
qrTMP.sql.Add('VALUES(:cNOME, :cDESCRICAO, :nNIVEL, :nINDICE ) ON');
qrTMP.sql.Add('DUPLICATE KEY UPDATE descricao = :cDESCRICAO, indice = :nINDICE');
qrTMP.ParamByName('cNOME').AsString := cNOME ;
qrTMP.ParamByName('cDESCRICAO').AsString := cDESCRICAO ;
qrTMP.ParamByName('nNIVEL').AsInteger := nNIVEL ;
qrTMP.ParamByName('nINDICE').AsInteger := nINDICE ;
try
qrTMP.ExecSQL;
except
on e: Exception do
begin
ShowMessage('Erro L90 '+#13+e.Message+#13+e.ClassName);
end;
end;
FreeAndNil(qrTMP);
end;
procedure TfrmPrincipal.protegemenu(nNIVEL: integer);
// Carrega o menu inteiro, durante o carregamento
// verifica o nivel do usuario, se o nivel do usuario
// for menor ou igual ao permitido na base de menu, ele exibe ou nao
var
nITEM, nPRINCIPAL : integer;
begin
for nPRINCIPAL := 0 to MainMenu1.Items.Count-1 do
begin
if nNIVEL >= RetornaNIVEL(MainMenu1.Items[nPRINCIPAL].Name) then
MainMenu1.Items[nPRINCIPAL].Enabled :=true
else
MainMenu1.Items[nPRINCIPAL].Enabled :=false;
for nITEM := 0 to MainMenu1.Items[nPRINCIPAL].Count-1 do
begin
if nNIVEL >= RetornaNIVEL(MainMenu1.Items[nPRINCIPAL].Items[nITEM].Name) then
MainMenu1.Items[nPRINCIPAL].Items[nITEM].Enabled:=true
else
MainMenu1.Items[nPRINCIPAL].Items[nITEM].Enabled:=false;
end;
end;
end;
function TfrmPrincipal.RetornaNIVEL(cNOME:string):integer;
// realiza a pesquisa de nivel, se encontrar o nome
// retorna o nivel cadastrado.
var
qrTMP : TZQuery;
nNIVEL : integer;
begin
qrTMP := TZQuery.Create(self);
qrTMP.Connection := conexao;
qrTMP.sql.Add('select * from crt_menu where nome = :cNOME');
qrTMP.ParamByName('cNOME').AsString:=cNOME;
qrTMP.Open;
if qrTMP.RecordCount > 0 then
nNIVEL := qrTMP.FieldByName('NIVEL').Value
else
nNIVEL := 1;
FreeAndNil(qrTMP);
result := nNIVEL;
end;
end.