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Diffstat (limited to 'examples/opengl/glpixmap/globjwin.cpp')
| -rw-r--r-- | examples/opengl/glpixmap/globjwin.cpp | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/examples/opengl/glpixmap/globjwin.cpp b/examples/opengl/glpixmap/globjwin.cpp new file mode 100644 index 000000000..6341c3e07 --- /dev/null +++ b/examples/opengl/glpixmap/globjwin.cpp @@ -0,0 +1,214 @@ +/**************************************************************************** +** +** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved. +** +** This file is part of an example program for TQt. 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( TQWidget* parent, const char* name ) + : TQWidget( parent, name ) +{ + // Create a menu + file = new TQPopupMenu( 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(tquit()), CTRL+Key_Q ); + + // Create a menu bar + TQMenuBar *m = new TQMenuBar( this ); + m->setSeparator( TQMenuBar::InWindowsStyle ); + m->insertItem("&File", file ); + + // Create nice frames to put around the OpenGL widgets + TQFrame* f1 = new TQFrame( this, "frame1" ); + f1->setFrameStyle( TQFrame::Sunken | TQFrame::Panel ); + f1->setLineWidth( 2 ); + + // Create an OpenGL widget + c1 = new GLBox( f1, "glbox1"); + + // Create a label that can display the pixmap + lb = new TQLabel( this, "pixlabel" ); + lb->setFrameStyle( TQFrame::Sunken | TQFrame::Panel ); + lb->setLineWidth( 2 ); + lb->setAlignment( AlignCenter ); + lb->setMargin( 0 ); + lb->setIndent( 0 ); + + // Create the three sliders; one for each rotation axis + TQSlider* x = new TQSlider ( 0, 360, 60, 0, TQSlider::Vertical, this, "xsl" ); + x->setTickmarks( TQSlider::Left ); + connect( x, SIGNAL(valueChanged(int)), c1, SLOT(setXRotation(int)) ); + + TQSlider* y = new TQSlider ( 0, 360, 60, 0, TQSlider::Vertical, this, "ysl" ); + y->setTickmarks( TQSlider::Left ); + connect( y, SIGNAL(valueChanged(int)), c1, SLOT(setYRotation(int)) ); + + TQSlider* z = new TQSlider ( 0, 360, 60, 0, TQSlider::Vertical, this, "zsl" ); + z->setTickmarks( TQSlider::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 + TQVBoxLayout* vlayout = new TQVBoxLayout( 20, "vlayout"); + vlayout->addWidget( x ); + vlayout->addWidget( y ); + vlayout->addWidget( z ); + + // Put the GL widget inside the frame + TQHBoxLayout* flayout1 = new TQHBoxLayout( f1, 2, 2, "flayout1"); + flayout1->addWidget( c1, 1 ); + + // Top level layout, puts the sliders to the left of the frame/GL widget + TQHBoxLayout* hlayout = new TQHBoxLayout( this, 20, 20, "hlayout"); + hlayout->setMenuBar( m ); + hlayout->addLayout( vlayout ); + hlayout->addWidget( f1, 1 ); + hlayout->addWidget( lb, 1 ); + +} + + + +void GLObjectWindow::grabFrameBuffer() +{ + TQImage img = c1->grabFrameBuffer(); + + // Convert image to pixmap so we can show it + TQPixmap pm; + pm.convertFromImage( img, AvoidDither ); + drawOnPixmap( &pm ); + lb->setPixmap( pm ); +} + + + +void GLObjectWindow::makePixmap() +{ + // Make a pixmap to to be rendered by the gl widget + TQPixmap 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 TQGLWidget to draw the pixmap. This widget will not be shown. + GLBox* w = new GLBox( this, "temporary glwidget", c1 ); + + bool success = FALSE; + TQPixmap pm; + + if ( w->isValid() ) { + // Set the current rotation + w->copyRotation( *c1 ); + + // Determine wanted pixmap size + TQSize 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( TQPixmap* 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 { + TQPainter p( pm ); + p.setFont( TQFont( "Helvetica", 18 ) ); + p.setPen( white ); + p.drawText( pm->rect(), AlignCenter, "This is a Pixmap" ); + } +} + + + +void GLObjectWindow::useFixedPixmapSize() +{ + if ( pmSz.isValid() ) { + pmSz = TQSize(); + file->setItemChecked( fixMenuItemId, FALSE ); + } + else { + pmSz = TQSize( 200, 200 ); + file->setItemChecked( fixMenuItemId, TRUE ); + } +} + + +void GLObjectWindow::makePixmapForMenu() +{ + TQPixmap pm = c1->renderPixmap( 32, 32 ); + if ( !pm.isNull() ) + file->changeItem( pm, "Insert Pixmap Here", insertMenuItemId ); +} |