Hi all, using Qt 3.3.4 free X11 on Fedora Core 4 Linux (i386).

Trying to create a custom widget like so:

Class declaration as follows
Qt Code: 
  1. // declaration (CGLFrame.h)
  2. #ifndef CGLFRAME_H
  3. #define CGLFRAME_H
  4.  
  5. #include "GLee.h"
  6. #include <qgl.h>
  7. #include <qframe.h>
  8. #include <qpaintdevice.h>
  9. #include <qapplication.h>
  10. #include <qevent.h>
  11. #include <qmessagebox.h>
  12. #include <qstring.h>
  13. #include <qfileinfo.h>
  14. #include <qtimer.h>
  15.  
  16. #include <stdlib.h>
  17. #include <stdio.h>
  18. #include <stdarg.h>
  19.  
  20. class CGLFrame : public QFrame
  21. {	
  22. 	Q_OBJECT
  23.  
  24. public:	
  25. 	CGLFrame(QWidget * parent = 0, const char * name = 0);		
  26. 	virtual ~CGLFrame();
  27. 	virtual void InitGLScene();
  28. 	virtual void ResizeGLScene();
  29. 	virtual void RenderGLScene(int pick);
  30. 	virtual void KillGLScene();
  31. 	virtual void InitGLSL();
  32. 	virtual void CheckGLError();
  33.  
  34. private:
  35. 	//	enum PickMode { PickNone, PickWidget };
  36. 	int m_iPickMode;
  37. 	QGLContext * m_cContext;
  38. 	QTimer	timerGL;
  39. 	char * readShaderFile(const char * filename);
  40. 	virtual void mousePressEvent(QMouseEvent * event);
  41. 	virtual void mouseReleaseEvent(QMouseEvent * event);
  42. 	virtual void mouseMoveEvent(QMouseEvent * event);
  43. 	virtual void resizeEvent(QResizeEvent * event);
  44. 	virtual void paintEvent(QPaintEvent * event);
  45. 	virtual void showEvent(QShowEvent * event);
  46. 	virtual void info(const char * title, const char * msg, ...);
  47.  
  48. public slots:
  49. 	void timerGLFire();	
  50. };
  51. #endif
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and class implementation as follows:

Qt Code: 
  1. #include "CGLFrame.h"
  2.  
  3. CGLFrame::CGLFrame(QWidget * parent, const char * name)
  4. 				: QFrame(parent, name),
  5. 				m_iPickMode(0),
  6. 				m_cContext(0)
  7. {
  8. 	QGLFormat format;
  9. 	m_cContext = new QGLContext(format, (QPaintDevice *)this);
  10. 	m_cContext->create();
  11.  
  12. 	InitGLScene();
  13. }
  14.  
  15. void CGLFrame::CheckGLError()
  16. {
  17. 	int err;
  18. 	if ((err = glGetError()) != GL_NO_ERROR) 
  19. 	{
  20. 		QString s = QString((char *)gluErrorString(err));
  21. 		info("GL error!", "%s\n", s.data());
  22. 	}	
  23. }
  24.  
  25. void CGLFrame::info(const char * title, const char * msg, ...)
  26. {
  27. 	... format message
  28. 	QMessageBox::information(0, title, text);
  29. }
  30.  
  31. void CGLFrame::InitGLScene()
  32. {
  33. 	m_cContext->makeCurrent();
  34.  
  35. 	//	initialize GLSL
  36. 	InitGLSL();
  37.  
  38. 	glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
  39. 	glClearDepth(1.0f);
  40. 	ResizeGLScene();
  41.  
  42. 	connect(&timerGL, SIGNAL(timeout()), this, SLOT(timerGLFire()));
  43. 	timerGL.start(0, FALSE);	
  44. }
  45.  
  46. void CGLFrame::InitGLSL()
  47. {
  48.     ... init GLSL
  49. }
  50.  
  51. char * CGLFrame::readShaderFile(const char * filename)
  52. {
  53.     ... read shader file
  54. }
  55.  
  56. void CGLFrame::ResizeGLScene()
  57. {
  58. 	m_cContext->makeCurrent();
  59. 	glViewport(0, 0, width(), height()); 
  60.  
  61. 	glMatrixMode(GL_PROJECTION); 
  62. 	glLoadIdentity(); 
  63.  
  64. 	glOrtho(-10.0, 10.0, 0.0, 10.0, -10.0, 10.0); 
  65.  
  66. 	glMatrixMode(GL_MODELVIEW); 
  67. 	glLoadIdentity();		
  68.  
  69. }
  70.  
  71. void CGLFrame::RenderGLScene(int pick)
  72. {
  73. 	m_cContext->makeCurrent();
  74. 	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
  75. 	glFlush();
  76.  
  77. 	if(m_cContext->format().doubleBuffer())
  78. 		m_cContext->swapBuffers();
  79. }
  80.  
  81. void CGLFrame::KillGLScene()
  82. {
  83. 	timerGL.stop();
  84. 	delete m_cContext;
  85. 	return;
  86. }
  87.  
  88.  
  89. void CGLFrame::mousePressEvent(QMouseEvent * event)
  90. {
  91. 	int mx = event->x();
  92. 	int my = event->y();
  93. }
  94.  
  95. void CGLFrame::mouseReleaseEvent(QMouseEvent * event)
  96. {
  97. 	int mx = event->x();
  98. 	int my = event->y();
  99. }
  100.  
  101. void CGLFrame::mouseMoveEvent(QMouseEvent * event)
  102. {
  103. 	int mx = event->x();
  104. 	int my = event->y();
  105. }
  106.  
  107. void CGLFrame::resizeEvent(QResizeEvent * event)
  108. {
  109. 	ResizeGLScene();
  110. }
  111.  
  112. void CGLFrame::paintEvent(QPaintEvent * event)
  113. {
  114. }
  115.  
  116. void CGLFrame::timerGLFire()
  117. {
  118. 	RenderGLScene(m_iPickMode);
  119. }
  120.  
  121. void CGLFrame::showEvent(QShowEvent * event)
  122. {
  123.  
  124. }
  125.  
  126. CGLFrame::~CGLFrame()
  127. {
  128. 	KillGLScene();
  129. }
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and in my ui.h:

Qt Code: 
  1. #include "CGLFrame.h"
  2.  
  3. CGLFrame * cGLFrame2DLUT = 0;
  4.  
  5. void CFormControls::init()
  6. {
  7.     cGLFrame2DLUT = new CGLFrame( tab2DLUT, "cGLFrame2DLUT" );
  8.     cGLFrame2DLUT->setGeometry( QRect( 20, 20, 256, 256 ) );
  9. }
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When I compile, here's my problem:

g++ -c -pipe -Wall -W -O2 -g -pipe -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -m32 -march=i386 -mtune=pentium4 -fasynchronous-unwind-tables -DQT_NO_DEBUG -DQT_SHARED -DQT_THREAD_SUPPORT -I/usr/lib/qt-3.3/mkspecs/default -I. -I/usr/lib/qt-3.3/include -I/usr/X11R6/include -I/usr/X11R6/include -I.ui/ -I. -I.moc/ -o .obj/CGLFrame.o CGLFrame.cpp
/usr/lib/qt-3.3/include/qnamespace.h:835: error: expected identifier before numeric constant
/usr/lib/qt-3.3/include/qnamespace.h:835: error: expected unqualified-id before numeric constant
/usr/lib/qt-3.3/include/qevent.h:61: error: expected identifier before numeric constant
/usr/lib/qt-3.3/include/qevent.h:61: error: expected `}' before numeric constant
/usr/lib/qt-3.3/include/qevent.h:61: error: expected unqualified-id before numeric constant
/usr/lib/qt-3.3/include/qevent.h:142: error: expected `)' before ‘type’
/usr/lib/qt-3.3/include/qevent.h:143: error: declaration of ‘~QEvent’ as non-member
/usr/lib/qt-3.3/include/qevent.h:144: error: ‘Type’ does not name a type
/usr/lib/qt-3.3/include/qevent.h:145: error: non-member function ‘bool spontaneous()’ cannot have cv-qualifier
/usr/lib/qt-3.3/include/qevent.h: In function ‘bool spontaneous()’:
/usr/lib/qt-3.3/include/qevent.h:145: error: ‘spont’ was not declared in this scope
/usr/lib/qt-3.3/include/qevent.h: At global scope:
/usr/lib/qt-3.3/include/qevent.h:146: error: expected unqualified-id before ‘protected’
/usr/lib/qt-3.3/include/qevent.h:148: error: expected unqualified-id before ‘private’
/usr/lib/qt-3.3/include/qevent.h:150: error: invalid function declaration
/usr/lib/qt-3.3/include/qevent.h:153: error: ‘friend’ can only be specified inside a class
/usr/lib/qt-3.3/include/qevent.h:154: error: ‘friend’ can only be specified inside a class
/usr/lib/qt-3.3/include/qevent.h:155: error: ‘friend’ can only be specified inside a class
/usr/lib/qt-3.3/include/qevent.h:156: error: ‘friend’ can only be specified inside a class
/usr/lib/qt-3.3/include/qevent.h:157: error: expected declaration before ‘}’ token
make: *** [.obj/CGLFrame.o] Error 1

Now, why the heck is my custom widget even affecting qnamespace.h & qevent.h? Why do my errors stop happening when I take the Q_OBJECT macro out of the class declaration? I'd just leave it out, but I need to have a slot for my timer!

Any ideas? Many thanks in advance!