unit cxSchedulerTaskDependencyEditor;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, cxSchedulerStorage, cxGraphics, cxTextEdit, cxMaskEdit,
  cxDropDownEdit, cxControls, cxContainer, cxEdit, cxLabel, Menus,
  cxLookAndFeelPainters, StdCtrls, cxButtons, cxGroupBox;

type
  TfmSchedulerTaskDependencyEditor = class(TForm)
    lbFrom: TcxLabel;
    lbTo: TcxLabel;
    lbType: TcxLabel;
    cbTypeRelation: TcxComboBox;
    btnCancel: TcxButton;
    btnOk: TcxButton;
    btnDelete: TcxButton;
    lbFromName: TcxLabel;
    lbToName: TcxLabel;
    cxGroupBox1: TcxGroupBox;
    procedure cbTypeRelationPropertiesChange(Sender: TObject);
    procedure btnDeleteClick(Sender: TObject);
    procedure FormKeyDown(Sender: TObject; var Key: Word;
      Shift: TShiftState);
  private
    FIsDelete: Boolean;
    FEventFrom: TcxSchedulerEvent;
    FEventTo: TcxSchedulerEvent;
    FIsModified: Boolean;
    FLinkRelation: TcxSchedulerEventRelation;
    procedure CheckButtonState;
    procedure SetLinkRelation(AValue: TcxSchedulerEventRelation);
  protected
    function GetEventStr(const AEvent: TcxSchedulerEvent): string; virtual;
    procedure InitControls; virtual;
    procedure SetCaptions;
  public
    function ShowModal: Integer; override;

    property IsDelete: Boolean read FIsDelete;
    property EventFrom: TcxSchedulerEvent read FEventFrom write FEventFrom;
    property EventTo: TcxSchedulerEvent read FEventTo write FEventTo;
    property IsModified: Boolean read FIsModified;
    property LinkRelation: TcxSchedulerEventRelation read FLinkRelation write SetLinkRelation;
  end;

TcxSchedulerTaskDependencyEditor = TfmSchedulerTaskDependencyEditor;
TcxSchedulerTaskDependencyEditorClass = class of TcxSchedulerTaskDependencyEditor;

implementation

uses
  cxSchedulerStrs;

{$R *.dfm}

function TfmSchedulerTaskDependencyEditor.ShowModal: Integer;
begin
  FIsModified := False;
  InitControls;
  FIsDelete := False;
  Result := inherited ShowModal;
end;

function TfmSchedulerTaskDependencyEditor.GetEventStr(const AEvent: TcxSchedulerEvent): string;
begin
  Result := AEvent.Caption;
end;

procedure TfmSchedulerTaskDependencyEditor.InitControls;
begin
  with cbTypeRelation.ActiveProperties.Items do
  begin
    Clear;
    Add(scxFinishToStartLong);
    Add(scxStartToStartLong);
    Add(scxFinishToFinishLong);
    Add(scxStartToFinishLong);
  end;
  cbTypeRelation.ItemIndex := Integer(LinkRelation);
  SetCaptions;
  FIsModified := False;
  CheckButtonState;
end;

procedure TfmSchedulerTaskDependencyEditor.SetCaptions;
begin
  Self.Caption := scxTaskDependencyEditorCaption;
  btnOk.Caption := scxOk;
  btnCancel.Caption := scxCancel;
  btnDelete.Caption := scxDelete;
  lbFrom.Caption := scxFrom;
  lbTo.Caption := scxTo;
  lbType.Caption := scxType;
  lbFromName.Caption := cxGetStringAdjustedToWidth(lbFromName.Style.Font, GetEventStr(FEventFrom), lbFromName.ClientWidth);
  lbToName.Caption := cxGetStringAdjustedToWidth(lbToName.Style.Font, GetEventStr(FEventTo), lbToName.ClientWidth);
end;

procedure TfmSchedulerTaskDependencyEditor.CheckButtonState;
begin
  btnOk.Enabled := IsModified;
end;

procedure TfmSchedulerTaskDependencyEditor.SetLinkRelation(AValue: TcxSchedulerEventRelation);
begin
  if AValue <> FLinkRelation then
  begin
    FLinkRelation := AValue;
    FIsModified := True;
    CheckButtonState;
  end;
end;

procedure TfmSchedulerTaskDependencyEditor.cbTypeRelationPropertiesChange(Sender: TObject);
begin
  LinkRelation := TcxSchedulerEventRelation(cbTypeRelation.ItemIndex);
  CheckButtonState;
end;

procedure TfmSchedulerTaskDependencyEditor.btnDeleteClick(Sender: TObject);
begin
  FIsDelete := True;
end;

procedure TfmSchedulerTaskDependencyEditor.FormKeyDown(Sender: TObject;
  var Key: Word; Shift: TShiftState);
begin
  if Key = VK_ESCAPE then
  begin
    ModalResult := mrCancel;
    Key := 0;
  end;
end;

end.