Hi all, I've just started using qt and I've run into the problem of constantly getting
undefined reference to 'vtable for window'
Witch is strange cause I was able to run some of the tutorial examples but this one just wont work.
I'm using Kdevelop 3.5 on ubuntu 7.04 and using qt4
window.h
Qt Code: 
  1. /***************************************************************************
  2.  *   Copyright (C) 2007 by adriaan,,,   *
  3.  *   adriaan@Tornado   *
  4.  *                                                                         *
  5.  *   This program is free software; you can redistribute it and/or modify  *
  6.  *   it under the terms of the GNU General Public License as published by  *
  7.  *   the Free Software Foundation; either version 2 of the License, or     *
  8.  *   (at your option) any later version.                                   *
  9.  *                                                                         *
  10.  *   This program is distributed in the hope that it will be useful,       *
  11.  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12.  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13.  *   GNU General Public License for more details.                          *
  14.  *                                                                         *
  15.  *   You should have received a copy of the GNU General Public License     *
  16.  *   along with this program; if not, write to the                         *
  17.  *   Free Software Foundation, Inc.,                                       *
  18.  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19.  ***************************************************************************/
  20.  
  21. #pragma once
  22.  
  23. #include <QApplication>
  24. #include <QtGui>
  25. #include <QWidget>
  26. #include <QComboBox>
  27. #include <QLineEdit>
  28. #include <QtGui>
  29. #include <QGridLayout>
  30. #include <QGroupBox>
  31. #include <QPushButton>
  32. #include <QLabel>
  33.  
  34.  
  35. class window : public QWidget
  36. {
  37.  
  38.  public:
  39.  
  40. 	window(QWidget * parent = NULL);
  41.  
  42. 	~window();
  43.  
  44.  private:
  45.  
  46. 	QLineEdit * nameline;
  47.  
  48. 	QLineEdit * typeline;
  49.  
  50. 	QLineEdit * answerline;
  51.  
  52.  };
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window.cpp
Qt Code: 
  1. /***************************************************************************
  2.  *   Copyright (C) 2007 by adriaan,,,   *
  3.  *   adriaan@Tornado   *
  4.  *                                                                         *
  5.  *   This program is free software; you can redistribute it and/or modify  *
  6.  *   it under the terms of the GNU General Public License as published by  *
  7.  *   the Free Software Foundation; either version 2 of the License, or     *
  8.  *   (at your option) any later version.                                   *
  9.  *                                                                         *
  10.  *   This program is distributed in the hope that it will be useful,       *
  11.  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12.  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13.  *   GNU General Public License for more details.                          *
  14.  *                                                                         *
  15.  *   You should have received a copy of the GNU General Public License     *
  16.  *   along with this program; if not, write to the                         *
  17.  *   Free Software Foundation, Inc.,                                       *
  18.  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19.  ***************************************************************************/
  20.  
  21.  
  22. #include "window.h"
  23.  
  24. window::window(QWidget * var) : QWidget(var)
  25. {
  26.  
  27. 	/*=================================================
  28. 	*	Settings					 *
  29. 	=================================================*/	
  30.  
  31. 	setWindowTitle("Variable Definer Version 0.1");
  32.  
  33. 	/*=================================================
  34. 	*	Name					 *
  35. 	=================================================*/			
  36.  
  37. 	QGroupBox * namegroup = new QGroupBox("Name");
  38.  
  39. 	QLabel * namelabel = new QLabel("Enter variable name:");
  40.  
  41. 	nameline = new QLineEdit();
  42.  
  43. 	nameline->setFocus();
  44.  
  45. 	QGridLayout * namelayout = new QGridLayout;
  46.  
  47. 	namelayout->addWidget(namelabel, 0, 0);
  48.  
  49. 	namelayout->addWidget(nameline, 1, 0,1,2);
  50.  
  51. 	namegroup->setLayout(namelayout);
  52.  
  53. 	/*=================================================
  54. 	*	Type					  *
  55. 	=================================================*/	
  56.  
  57. 	QGroupBox * typegroup = new QGroupBox("Type");
  58.  
  59. 	QLabel * typeLabel = new QLabel("Enter variable type");
  60.  
  61. 	typeline = new QLineEdit(); 
  62.  
  63. 	QGridLayout * typelayout = new QGridLayout();
  64.  
  65. 	typelayout->addWidget(typeLabel, 0, 0);
  66.  
  67. 	typelayout->addWidget(typeline, 1,0,1,2);
  68.  
  69. 	typegroup->setLayout(typelayout);
  70.  
  71. 	/*=================================================
  72. 	*	Specifiers					 *
  73. 	=================================================*/
  74.  
  75. 	QGroupBox * specgroup = new QGroupBox("Specifiers");
  76.  
  77. 	QLabel * speclabel = new QLabel("Choose the right defenition");
  78.  
  79. 	QPushButton * array = new QPushButton("Array (of)"); 
  80.  
  81. 	QPushButton * pointer = new QPushButton("Pointer (to)");
  82.  
  83. 	QPushButton * function = new QPushButton("Function");
  84.  
  85. 	QGridLayout * speclay = new QGridLayout(); 
  86.  
  87. 	speclay->addWidget(speclabel,0,0);
  88.  
  89. 	speclay->addWidget(array,1,0); 
  90.  
  91. 	speclay->addWidget(pointer,1,1);
  92.  
  93. 	speclay->addWidget(function,1,2); 
  94.  
  95. 	specgroup->setLayout(speclay);
  96.  
  97. 	/*=================================================
  98. 	*	Answer					 *
  99. 	=================================================*/
  100.  
  101. 	QGroupBox * answergroup = new QGroupBox("Defenition");
  102.  
  103. 	QLabel * answerlabel = new QLabel("The correct defenition:");
  104.  
  105. 	answerline = new QLineEdit();
  106.  
  107. 	QGridLayout * anslay= new QGridLayout();  
  108.  
  109. 	anslay->addWidget(answerlabel,0,0); 
  110.  
  111. 	anslay->addWidget(answerline,1,0,1,2); 
  112.  
  113. 	answergroup->setLayout(anslay);
  114.  
  115. 	/*=================================================
  116. 	*	Global Layout				 *
  117. 	=================================================*/
  118.  
  119. 	QGridLayout * layout = new QGridLayout();
  120.  
  121. 	layout->addWidget(namegroup, 0, 0);
  122.  
  123. 	layout->addWidget(typegroup, 1, 0);
  124.  
  125. 	layout->addWidget(specgroup, 2, 0);
  126.  
  127. 	layout->addWidget(answergroup,3, 0);
  128.  
  129. 	setLayout(layout);
  130.  
  131. }
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main.cpp
Qt Code: 
  1. /***************************************************************************
  2.  *   Copyright (C) 2007 by adriaan,,,   *
  3.  *   adriaan@Tornado   *
  4.  *                                                                         *
  5.  *   This program is free software; you can redistribute it and/or modify  *
  6.  *   it under the terms of the GNU General Public License as published by  *
  7.  *   the Free Software Foundation; either version 2 of the License, or     *
  8.  *   (at your option) any later version.                                   *
  9.  *                                                                         *
  10.  *   This program is distributed in the hope that it will be useful,       *
  11.  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12.  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13.  *   GNU General Public License for more details.                          *
  14.  *                                                                         *
  15.  *   You should have received a copy of the GNU General Public License     *
  16.  *   along with this program; if not, write to the                         *
  17.  *   Free Software Foundation, Inc.,                                       *
  18.  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19.  ***************************************************************************/
  20.  
  21.  
  22. #include <QApplication>
  23.  
  24. #include "window.h"
  25.  
  26. int main(int argc, char *argv[])
  27. {
  28.  
  29.       	QApplication application (argc, argv);
  30.  
  31. 	window * newwindow = new window();
  32.  
  33. 	newwindow->show();
  34.  
  35. 	return (application.exec());
  36.  
  37. }
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