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/****************************************************************************
**
** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved.
**
** This file is part of an example program for Qt. This example
** program may be used, distributed and modified without limitation.
**
*****************************************************************************/
/****************************************************************************
**
** Implementation of GLObjectWindow widget class
**
****************************************************************************/
#include <qpushbutton.h>
#include <qslider.h>
#include <qlayout.h>
#include <qframe.h>
#include <qlabel.h>
#include <qmenubar.h>
#include <qpopupmenu.h>
#include <qapplication.h>
#include <qkeycode.h>
#include <qpixmap.h>
#include <qimage.h>
#include <qpainter.h>
#include "globjwin.h"
#include "glbox.h"
GLObjectWindow::GLObjectWindow( QWidget* parent, const char* name )
: QWidget( parent, name )
{
// Create a menu
file = new QPopupMenu( this );
file->setCheckable( TRUE );
file->insertItem( "Grab Frame Buffer", this, SLOT(grabFrameBuffer()) );
file->insertItem( "Render Pixmap", this, SLOT(makePixmap()) );
file->insertItem( "Render Pixmap Hidden", this, SLOT(makePixmapHidden()) );
file->insertSeparator();
fixMenuItemId = file->insertItem( "Use Fixed Pixmap Size", this,
SLOT(useFixedPixmapSize()) );
file->insertSeparator();
insertMenuItemId = file->insertItem( "Insert Pixmap Here", this,
SLOT(makePixmapForMenu()) );
file->insertSeparator();
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 );
// Create an OpenGL widget
c1 = new GLBox( f1, "glbox1");
// Create a label that can display the pixmap
lb = new QLabel( this, "pixlabel" );
lb->setFrameStyle( QFrame::Sunken | QFrame::Panel );
lb->setLineWidth( 2 );
lb->setAlignment( AlignCenter );
lb->setMargin( 0 );
lb->setIndent( 0 );
// Create the three sliders; one for each rotation axis
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)) );
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)) );
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)) );
// 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 widget inside the frame
QHBoxLayout* flayout1 = new QHBoxLayout( f1, 2, 2, "flayout1");
flayout1->addWidget( c1, 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( lb, 1 );
}
void GLObjectWindow::grabFrameBuffer()
{
QImage img = c1->grabFrameBuffer();
// Convert image to pixmap so we can show it
QPixmap pm;
pm.convertFromImage( img, AvoidDither );
drawOnPixmap( &pm );
lb->setPixmap( pm );
}
void GLObjectWindow::makePixmap()
{
// Make a pixmap to to be rendered by the gl widget
QPixmap pm;
// Render the pixmap, with either c1's size or the fixed size pmSz
if ( pmSz.isValid() )
pm = c1->renderPixmap( pmSz.width(), pmSz.height() );
else
pm = c1->renderPixmap();
if ( !pm.isNull() ) {
// Present the pixmap to the user
drawOnPixmap( &pm );
lb->setPixmap( pm );
}
else {
lb->setText( "Failed to render Pixmap." );
}
}
void GLObjectWindow::makePixmapHidden()
{
// Make a QGLWidget to draw the pixmap. This widget will not be shown.
GLBox* w = new GLBox( this, "temporary glwidget", c1 );
bool success = FALSE;
QPixmap pm;
if ( w->isValid() ) {
// Set the current rotation
w->copyRotation( *c1 );
// Determine wanted pixmap size
QSize sz = pmSz.isValid() ? pmSz : c1->size();
// Make our hidden glwidget render the pixmap
pm = w->renderPixmap( sz.width(), sz.height() );
if ( !pm.isNull() )
success = TRUE;
}
if ( success ) {
// Present the pixmap to the user
drawOnPixmap( &pm );
lb->setPixmap( pm );
}
else {
lb->setText( "Failed to render Pixmap." );
}
delete w;
}
void GLObjectWindow::drawOnPixmap( QPixmap* pm )
{
// Draw some text on the pixmap to differentiate it from the GL window
if ( pm->isNull() ) {
tqWarning("Cannot draw on null pixmap");
return;
}
else {
QPainter p( pm );
p.setFont( QFont( "Helvetica", 18 ) );
p.setPen( white );
p.drawText( pm->rect(), AlignCenter, "This is a Pixmap" );
}
}
void GLObjectWindow::useFixedPixmapSize()
{
if ( pmSz.isValid() ) {
pmSz = QSize();
file->setItemChecked( fixMenuItemId, FALSE );
}
else {
pmSz = QSize( 200, 200 );
file->setItemChecked( fixMenuItemId, TRUE );
}
}
void GLObjectWindow::makePixmapForMenu()
{
QPixmap pm = c1->renderPixmap( 32, 32 );
if ( !pm.isNull() )
file->changeItem( pm, "Insert Pixmap Here", insertMenuItemId );
}
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