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unit frm_personmaint;
{$mode objfpc}{$H+}
interface
uses
SysUtils, Classes, fpg_base, fpg_main, fpg_edit,
fpg_form, fpg_label, fpg_button,
model, model_view;
type
TPersonMaintForm = class(TfpgForm)
private
FData: TPerson;
FMemento: TPersonMemento; // This form is the Caretaker
FmedName: TPerson_Name_TextEdit_View;
FmedAge: TPerson_Age_TextEdit_View;
procedure FormShow(Sender: TObject);
procedure SetData(const AValue: TPerson);
procedure SetupMediators;
public
{@VFD_HEAD_BEGIN: PersonMaintForm}
lblName1: TfpgLabel;
edtName: TfpgEdit;
lblName2: TfpgLabel;
edtAge: TfpgEdit;
btnOK: TfpgButton;
btnCancel: TfpgButton;
lblName3: TfpgLabel;
{@VFD_HEAD_END: PersonMaintForm}
constructor Create(AOwner: TComponent); override;
destructor Destroy; override;
procedure AfterCreate; override;
property Data: TPerson read FData write SetData;
end;
procedure EditPerson(const AData: TPerson);
{@VFD_NEWFORM_DECL}
implementation
procedure EditPerson(const AData: TPerson);
var
frm: TPersonMaintForm;
begin
frm := TPersonMaintForm.Create(nil);
try
frm.Data := AData;
if frm.ShowModal = 2 then // Cancel clicked
begin
// undo changes
AData.BeginUpdate;
AData.Memento := frm.FMemento;
AData.EndUpdate;
end;
finally
frm.Free;
end;
end;
{@VFD_NEWFORM_IMPL}
procedure TPersonMaintForm.FormShow(Sender: TObject);
begin
SetupMediators;
end;
procedure TPersonMaintForm.SetData(const AValue: TPerson);
begin
if FData = AValue then
exit; //==>>
FData := AValue;
FreeAndNil(FMemento);
FMemento := FData.Memento;
end;
procedure TPersonMaintForm.SetupMediators;
begin
FmedName := TPerson_Name_TextEdit_View.CreateCustom(edtName, FData, 'Name', 'Text');
FmedAge := TPerson_Age_TextEdit_View.CreateCustom(edtAge, FData, 'Age', 'Text');
// edtName.Text := FData.Name;
// edtAge.Text := IntToStr(FData.Age);
// Notify all observers to update themselves.
FData.NotifyObservers;
end;
constructor TPersonMaintForm.Create(AOwner: TComponent);
begin
inherited Create(AOwner);
OnShow := @FormShow;
end;
destructor TPersonMaintForm.Destroy;
begin
FmedName.Free;
FmedAge.Free;
inherited Destroy;
end;
procedure TPersonMaintForm.AfterCreate;
begin
{@VFD_BODY_BEGIN: PersonMaintForm}
Name := 'PersonMaintForm';
SetPosition(418, 244, 232, 190);
WindowTitle := 'Edit Person...';
lblName1 := TfpgLabel.Create(self);
with lblName1 do
begin
Name := 'lblName1';
SetPosition(8, 8, 212, 15);
FontDesc := '#Label1';
Text := 'Name:';
end;
edtName := TfpgEdit.Create(self);
with edtName do
begin
Name := 'edtName';
SetPosition(8, 24, 212, 21);
TabOrder := 1;
Text := '';
FontDesc := '#Edit1';
end;
lblName2 := TfpgLabel.Create(self);
with lblName2 do
begin
Name := 'lblName2';
SetPosition(8, 56, 212, 15);
FontDesc := '#Label1';
Text := 'Age:';
end;
edtAge := TfpgEdit.Create(self);
with edtAge do
begin
Name := 'edtAge';
SetPosition(8, 72, 64, 21);
TabOrder := 3;
Text := '';
FontDesc := '#Edit1';
end;
btnOK := TfpgButton.Create(self);
with btnOK do
begin
Name := 'btnOK';
SetPosition(56, 159, 80, 23);
Anchors := [anRight,anBottom];
Text := 'OK';
FontDesc := '#Label1';
ImageName := '';
ModalResult := 1;
TabOrder := 4;
end;
btnCancel := TfpgButton.Create(self);
with btnCancel do
begin
Name := 'btnCancel';
SetPosition(140, 159, 80, 23);
Anchors := [anRight,anBottom];
Text := 'Cancel';
FontDesc := '#Label1';
ImageName := '';
ModalResult := 2;
TabOrder := 5;
end;
lblName3 := TfpgLabel.Create(self);
with lblName3 do
begin
Name := 'lblName3';
SetPosition(8, 108, 212, 39);
Anchors := [anLeft,anRight,anTop,anBottom];
FontDesc := '#Label1';
Text := 'Notice as you change the values they are updated in the MainForm''s Grid.';
WrapText := True;
end;
{@VFD_BODY_END: PersonMaintForm}
end;
end.
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