/****************************************************************************** $Id: qt/globjwin.cpp   3.1.1   edited Nov 8 10:35 $**** Copyright (C) 1992-2000 Trolltech AS.  All rights reserved.**** This file is part of an example program for Qt.  This example** program may be used, distributed and modified without limitation.*******************************************************************************/#include <qpushbutton.h>#include <qslider.h>#include <qlayout.h>#include <qframe.h>#include <qmenubar.h>#include <qpopupmenu.h>#include <qapplication.h>#include <qkeycode.h>#include "globjwin.h"#include "glbox.h"GLObjectWindow::GLObjectWindow( QWidget* parent, const char* name )    : QWidget( parent, name ){    // Create a menu    QPopupMenu *file = new QPopupMenu( this );    file->insertItem( "Delete Left QGLWidget", this, 		      SLOT(deleteFirstWidget()) );    file->insertItem( "Exit",  qApp, SLOT(quit()), CTRL+Key_Q );    // Create a menu bar    QMenuBar *m = new QMenuBar( this );    m->setSeparator( QMenuBar::InWindowsStyle );    m->insertItem("&File", file );    // Create nice frames to put around the OpenGL widgets    QFrame* f1 = new QFrame( this, "frame1" );    f1->setFrameStyle( QFrame::Sunken | QFrame::Panel );    f1->setLineWidth( 2 );    QFrame* f2 = new QFrame( this, "frame2" );    f2->setFrameStyle( QFrame::Sunken | QFrame::Panel );    f2->setLineWidth( 2 );    // Create an OpenGL widget    c1 = new GLBox( f1, "glbox1" );        // Create another OpenGL widget that shares display lists with the first    c2 = new GLBox( f2, "glbox2", c1 );    // Create the three sliders; one for each rotation axis    // Make them spin the boxes, but not in synch    QSlider* x = new QSlider ( 0, 360, 60, 0, QSlider::Vertical, this, "xsl" );    x->setTickmarks( QSlider::Left );    connect( x, SIGNAL(valueChanged(int)), c1, SLOT(setXRotation(int)) );    connect( x, SIGNAL(valueChanged(int)), c2, SLOT(setZRotation(int)) );    QSlider* y = new QSlider ( 0, 360, 60, 0, QSlider::Vertical, this, "ysl" );    y->setTickmarks( QSlider::Left );    connect( y, SIGNAL(valueChanged(int)), c1, SLOT(setYRotation(int)) );    connect( y, SIGNAL(valueChanged(int)), c2, SLOT(setXRotation(int)) );    QSlider* z = new QSlider ( 0, 360, 60, 0, QSlider::Vertical, this, "zsl" );    z->setTickmarks( QSlider::Left );    connect( z, SIGNAL(valueChanged(int)), c1, SLOT(setZRotation(int)) );    connect( z, SIGNAL(valueChanged(int)), c2, SLOT(setYRotation(int)) );    // Now that we have all the widgets, put them into a nice layout    // Put the sliders on top of each other    QVBoxLayout* vlayout = new QVBoxLayout( 20, "vlayout");    vlayout->addWidget( x );    vlayout->addWidget( y );    vlayout->addWidget( z );    // Put the GL widgets inside the frames    QHBoxLayout* flayout1 = new QHBoxLayout( f1, 2, 2, "flayout1");    flayout1->addWidget( c1, 1 );    QHBoxLayout* flayout2 = new QHBoxLayout( f2, 2, 2, "flayout2");    flayout2->addWidget( c2, 1 );    // Top level layout, puts the sliders to the left of the frame/GL widget    QHBoxLayout* hlayout = new QHBoxLayout( this, 20, 20, "hlayout");    hlayout->setMenuBar( m );    hlayout->addLayout( vlayout );    hlayout->addWidget( f1, 1 );    hlayout->addWidget( f2, 1 );}void GLObjectWindow::deleteFirstWidget(){    // Delete only c1; c2 will keep working and use the shared display list    if ( c1 ) {	delete c1;	c1 = 0;    }}