[Qt] uclibc + libqt4intf- EAccessViolation : Access violation

[Den Jean]

On Monday 01 February 2010 11:41:25 Nataraj S Narayan wrote:
> #1  0x401c0ab4 in QObject_hook::eventFilter () from /usr/lib/libqt4intf.so
> 
in embedded, first try a very small c++ app like 
qt-embedded-linux-opensource-src-4.5.3/examples/tutorials/addressbook/part1 
to verify your qt setup

then try a very small freepascal writeln hello world app in fpc (*without* Qt)

then translate the qt tutor to a pascal qt4 app with the binding.(see below)

compiling the Qt libs and the Qt binding with debug info if still problems



addressbook.lpr:
http://users.telenet.be/Jan.Van.hijfte/qtforfpc/addressbook.png


program addressbook;

{$mode objfpc}{$H+}

uses
  {$IFDEF UNIX}{$IFDEF UseCThreads}
  cthreads,
  {$ENDIF}{$ENDIF}
  Classes,SysUtils,Types,Qt4;


type

TAddressBook = class(TObject)
  public
  Handle : QWidgetH;
  NameLine : QLineEditH;
  AddressText : QTextEditH;
  constructor Create;
end;

constructor TAddressBook.Create;
var
  NameLabel : QLabelH;
  AddressLabel : QLabelH;
  MainLayout : QGridLayoutH;
  w : WideString;
begin
  Handle:=QWidget_create;

  w:='Name:';
  NameLabel:=QLabel_Create(@w);
  NameLine:=QLineEdit_create;

  w:='Address:';
  AddressLabel:=QLabel_create(@w);
  AddressText:=QTextEdit_create;

  MainLayout:=QGridLayout_create;
  QGridLayout_addWidget(MainLayout,NameLabel,0,0);
  QGridLayout_addWidget(MainLayout,NameLine,0,1);
  QGridLayout_addWidget(MainLayout,AddressLabel,1,0,QtAlignTop);
  QGridLayout_addWidget(MainLayout,AddressText,1,1);

  QWidget_setLayout(Handle,MainLayout);
  w:='Simple Address Book';
  QWidget_setWindowTitle(Handle, at w);
  end;

var
  App : QApplicationH;
  AddrBook : TAddressBook;

begin
  App:=QApplication_create(@Argc,Argv);
  AddrBook:=TAddressBook.Create;
  QWidget_show(AddrBook.Handle);

  QCoreApplication_exec;
end.