unit LazMsgWorker;

{$mode objfpc}{$H+}

interface

uses
  // LazUtils
  System.UITypes;

type
  TLazMessageWorker = function(const aCaption, aMsg: string;
                               DlgType: TMsgDlgType; Buttons: TMsgDlgButtons;
                               const HelpKeyword: string = ''): Integer of object;
  TLazQuestionWorker = function(const aCaption, aMsg: string;
                                DlgType: TMsgDlgType; Buttons: array of const;
                                const HelpKeyword: string = ''): Integer of object;

var  // set by the IDE
  LazMessageWorker: TLazMessageWorker = nil;
  LazQuestionWorker: TLazQuestionWorker = nil;

function LazMessageDialogAb(const aCaption, aMsg: string;
                   DlgType: TMsgDlgType; Buttons: TMsgDlgButtons;
                   ShowAbort: boolean; const HelpKeyword: string = ''): Integer;
function LazQuestionDialogAb(const aCaption, aMsg: string;
                   DlgType: TMsgDlgType; Buttons: array of const;
                   HideAbort: boolean; const HelpKeyword: string = ''): Integer;

implementation

function LazMessageDialogAb(const aCaption, aMsg: string; DlgType: TMsgDlgType;
  Buttons: TMsgDlgButtons; ShowAbort: boolean; const HelpKeyword: string): Integer;
begin
  if ShowAbort then begin
    // add an abort button for 'Cancel all' and replace a Cancel with Ignore
    Buttons:=Buttons+[mbAbort];
    if mbCancel in Buttons then
      Buttons:=Buttons-[mbCancel]+[mbIgnore];
  end;
  Result:=LazMessageWorker(aCaption,aMsg,DlgType,Buttons,HelpKeyword);
end;

function LazQuestionDialogAb(const aCaption, aMsg: string;
  DlgType: TMsgDlgType; Buttons: array of const;
  HideAbort: boolean; const HelpKeyword: string): Integer;
var
  NewButtons: array of TVarRec;
  i: Integer;
  j: Integer;
begin
  SetLength(NewButtons{%H-},High(Buttons)-Low(Buttons)+1);
  i:=low(Buttons);
  j:=0;
  while i<=High(Buttons) do begin
    if HideAbort
    and (Buttons[i].VType=vtInteger)
    and (Buttons[i].VInteger=mrAbort) then begin
      // skip abort button
      inc(i);
      // and skip abort caption
      if Buttons[i].VType<>vtInteger then
        inc(i);
    end else begin
      NewButtons[j]:=Buttons[i];
      inc(i);
      inc(j);
    end;
  end;
  SetLength(NewButtons,j);
  Result:=LazQuestionWorker(aCaption,aMsg,DlgType,NewButtons,HelpKeyword);
end;


end.