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Unit1.pas
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Unit1.pas
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unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls, XPMan, Grids, DBGrids, DB, ZAbstractRODataset,
ZAbstractDataset, ZDataset, ZConnection, ExtCtrls, ZAbstractConnection, Math;
type
Tfrmmain = class(TForm)
CbLimit: TComboBox;
Label1: TLabel;
Edit_Search: TEdit;
Label2: TLabel;
DsData: TDataSource;
Grid_Data: TDBGrid;
LblRecord: TLabel;
Connection_Data: TZConnection;
QData: TZQuery;
PanelButton: TPanel;
LbPages: TLabel;
btnprev: TButton;
btnfirst: TButton;
btnlast: TButton;
btnnext: TButton;
QCount: TZQuery;
procedure FormCreate(Sender: TObject);
procedure CbLimitChange(Sender: TObject);
procedure Edit_SearchChange(Sender: TObject);
procedure Grid_DataDrawColumnCell(Sender: TObject; const Rect: TRect;
DataCol: Integer; Column: TColumn; State: TGridDrawState);
procedure FormShow(Sender: TObject);
procedure btnfirstClick(Sender: TObject);
procedure btnprevClick(Sender: TObject);
procedure btnnextClick(Sender: TObject);
procedure btnlastClick(Sender: TObject);
private
{ Private declarations }
procedure pagingrecord(nhal: Integer);
function SetCueBanner(const Edit: TEdit;
const Placeholder: string): Boolean;
procedure clickbuttonpaging(Sender: TObject);
public
{ Public declarations }
end;
var
frmmain: Tfrmmain;
posisiawal, tothal, hal, datatotal: integer;
const
btn_perhalaman = 5;
posisi_btn_bold = 3;
implementation
{$R *.dfm}
//source: http://kppdi.id/membuat-placeholder-text-pada-komponen-tedit/
function Tfrmmain.SetCueBanner(const Edit: TEdit;
const Placeholder: string): Boolean;
const
EM_SETCUEBANNER = $1501;
var
UniStr: WideString;
begin
UniStr := Placeholder;
SendMessage(Edit.Handle, EM_SETCUEBANNER, WParam(True), LParam(UniStr));
Result := GetLastError() = ERROR_SUCCESS;
end;
procedure Tfrmmain.clickbuttonpaging(Sender: TObject);
begin
pagingrecord(TButton(Sender).Tag);
end;
//membuat procedure paging
procedure Tfrmmain.pagingrecord(nhal: Integer);
var
i, posisiakhir: Integer;
begin
Screen.Cursor := crHourGlass;
if (nhal >= 1) then
begin
posisiawal := (nhal - 1) * StrToIntDef(CbLimit.Text, 25);
hal := nhal;
end
else begin
posisiawal := 0;
hal := 1;
end;
//tampilkan data + limit
with QData do
begin
FetchRow := StrToIntDef(CbLimit.Text, 25);
SQL.Text := 'select id, kelurahan, kecamatan, kota, propinsi, waktu from wilayah ' +
'where id like :paramsearch or kelurahan like :paramsearch or kecamatan like :paramsearch ' +
'or kota like :paramsearch or propinsi like :paramsearch order by id ' +
'limit :paramoffset, :paramcount';
ParamByName('paramsearch').AsString := '%' + Edit_Search.Text + '%';
ParamByName('paramoffset').AsInteger := posisiawal;
ParamByName('paramcount').AsInteger := StrToIntDef(CbLimit.Text, 25);
Open;
end;
//cari jumlah record
with QCount do
begin
SQL.Text := 'select count(*) totrecord from wilayah ' +
'where id like :paramsearch or kelurahan like :paramsearch or kecamatan like :paramsearch ' +
'or kota like :paramsearch or propinsi like :paramsearch';
ParamByName('paramsearch').AsString := '%' + Edit_Search.Text + '%';
Open;
end;
datatotal := QCount.Fields[0].AsInteger;
tothal := Ceil(datatotal / StrToIntDef(CbLimit.Text, 25));
if hal = tothal then posisiakhir := datatotal else posisiakhir := StrToIntDef(CbLimit.Text, 25) * hal;
LblRecord.Caption := 'Showing ' + IntToStr(posisiawal + 1) + ' to ' + IntToStr(posisiakhir) + ' of ' + IntToStr(datatotal) + ' entries';
LbPages.Caption := 'Page ' + IntToStr(hal) + ' / ' + IntToStr(tothal);
//
for i := btn_perhalaman downto 1 do
begin
with TButton(FindComponent('btn' + IntToStr(i))) do
begin
if hal = 1 then Align := alLeft;
if tothal > btn_perhalaman then
begin
if hal <= tothal - posisi_btn_bold then
begin
if hal > posisi_btn_bold then
Tag := i + (hal - posisi_btn_bold)
else
Tag := i;
end
else
Tag := i + (hal - btn_perhalaman) + (tothal - hal);
Caption := IntToStr(Tag);
Visible := True;
Hint := 'Halaman ke ' + IntToStr(Tag);
end
else begin
if i > tothal then
Visible := False
else begin
Caption := IntToStr(Tag);
Visible := True;
Hint := 'Halaman ke ' + IntToStr(Tag);
end;
end;
if hal = Tag then Font.Style := [fsbold] else Font.Style := [];
if hal = 1 then Align := alRight;
end;
end;
//
btnfirst.Enabled := tothal > 1;
btnnext.Enabled := tothal > 1;
btnprev.Enabled := tothal > 1;
btnlast.Enabled := tothal > 1;
//
Screen.Cursor := crDefault;
end;
procedure Tfrmmain.FormCreate(Sender: TObject);
begin
CbLimit.ItemIndex := 1;
SetCueBanner(Edit_Search, 'search here');
try
with Connection_Data do
begin
HostName := 'localhost';
Port := 3307;
User := 'root';
Password := '';
Database := 'share';
Connect;
end;
except
on E: Exception do begin
MessageDlg('Koneksi ke database gagal..' + #13 + 'Pesan error: ' + E.Message, mtError, [mbOK], 0);
Application.Terminate;
end;
end;
end;
procedure Tfrmmain.CbLimitChange(Sender: TObject);
begin
pagingrecord(0);
end;
procedure Tfrmmain.Edit_SearchChange(Sender: TObject);
begin
pagingrecord(0);
end;
procedure Tfrmmain.Grid_DataDrawColumnCell(Sender: TObject;
const Rect: TRect; DataCol: Integer; Column: TColumn;
State: TGridDrawState);
var
grid: TDBGrid;
row: integer;
begin
grid := sender as TDBGrid;
row := grid.DataSource.DataSet.RecNo;
if Odd(row) then
grid.Canvas.Brush.Color := $00F9F9F9
else
grid.Canvas.Brush.Color := clWhite;
grid.Canvas.Font.Color := clBlack;
grid.DefaultDrawColumnCell(Rect, DataCol, Column, State);
end;
procedure Tfrmmain.FormShow(Sender: TObject);
var
ii: Integer;
buttonpaging: TButton;
begin
for ii := btn_perhalaman downto 1 do
begin
buttonpaging := TButton.Create(Self);
with buttonpaging do
begin
Parent := PanelButton;
Align := alRight;
Height := 25;
Width := 33;
Name := 'btn' + IntToStr(ii);
Tag := ii;
Caption := IntToStr(ii);
Hint := 'Halaman ke ' + IntToStr(ii);
ShowHint := True;
Visible := True;
OnClick := clickbuttonpaging;
end;
end;
pagingrecord(0);
end;
procedure Tfrmmain.btnfirstClick(Sender: TObject);
begin
pagingrecord(0);
end;
procedure Tfrmmain.btnprevClick(Sender: TObject);
begin
if hal > 1 then pagingrecord(hal - 1) else pagingrecord(0)
end;
procedure Tfrmmain.btnnextClick(Sender: TObject);
begin
if hal < tothal then pagingrecord(hal + 1) else pagingrecord(tothal)
end;
procedure Tfrmmain.btnlastClick(Sender: TObject);
begin
pagingrecord(tothal);
end;
end.