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- /****************************************************************************
- ** $Id: qt/globjwin.cpp 3.0.3 edited Oct 12 12:18 $
- **
- ** 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.
- **
- *****************************************************************************/
-
- /****************************************************************************
- **
- ** 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() ) {
- qWarning("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 );
- }
-