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Diffstat (limited to 'examples/demo/opengl/glcontrolwidget.cpp')
| -rw-r--r-- | examples/demo/opengl/glcontrolwidget.cpp | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/examples/demo/opengl/glcontrolwidget.cpp b/examples/demo/opengl/glcontrolwidget.cpp new file mode 100644 index 0000000..d81d328 --- /dev/null +++ b/examples/demo/opengl/glcontrolwidget.cpp @@ -0,0 +1,195 @@ +#include "glcontrolwidget.h" + +#include <qcursor.h> +#include <qtimer.h> + +#include <math.h> + +GLControlWidget::GLControlWidget( QWidget *parent, const char *name, QGLWidget *share, WFlags f ) +: QGLWidget( parent, name, share, f ), + xRot(0),yRot(0),zRot(0),xTrans(0),yTrans(0),zTrans(-10.0),scale(5.0), animation(TRUE), wasAnimated(FALSE), delay( 50 ) +{ + setCursor( pointingHandCursor ); + timer = new QTimer( this ); + connect( timer, SIGNAL(timeout()), SLOT(animate()) ); + timer->start( delay ); +} + +void GLControlWidget::transform() +{ + glTranslatef( xTrans, yTrans, zTrans ); + glScalef( scale, scale, scale ); + + glRotatef( xRot, 1.0, 0.0, 0.0 ); + glRotatef( yRot, 0.0, 1.0, 0.0 ); + glRotatef( zRot, 0.0, 0.0, 1.0 ); +} + +void GLControlWidget::drawText() +{ + glPushAttrib( GL_LIGHTING_BIT | GL_TEXTURE_BIT ); + glDisable( GL_LIGHTING ); + glDisable( GL_TEXTURE_2D ); + qglColor( white ); + QString str( "Rendering text in OpenGL is easy with Qt" ); + QFontMetrics fm( font() ); + renderText( (width() - fm.width( str )) / 2, 15, str ); + QFont f( "courier", 8 ); + QFontMetrics fmc( f ); + qglColor( QColor("skyblue") ); + int x, y, z; + x = (xRot >= 0) ? (int) xRot % 360 : 359 - (QABS((int) xRot) % 360); + y = (yRot >= 0) ? (int) yRot % 360 : 359 - (QABS((int) yRot) % 360); + z = (zRot >= 0) ? (int) zRot % 360 : 359 - (QABS((int) zRot) % 360); + str.sprintf( "Rot X: %03d - Rot Y: %03d - Rot Z: %03d", x, y, z ); + renderText( (width() - fmc.width( str )) / 2, height() - 15, str, f ); + glPopAttrib(); +} + +/*! + Set the rotation angle of the object to \e degrees around the X axis. +*/ +void GLControlWidget::setXRotation( double degrees ) +{ + xRot = (GLfloat)fmod(degrees, 360.0); + updateGL(); +} + +/*! + Set the rotation angle of the object to \e degrees around the Y axis. +*/ +void GLControlWidget::setYRotation( double degrees ) +{ + yRot = (GLfloat)fmod(degrees, 360.0); + updateGL(); +} + + +/*! + Set the rotation angle of the object to \e degrees around the Z axis. +*/ +void GLControlWidget::setZRotation( double degrees ) +{ + zRot = (GLfloat)fmod(degrees, 360.0); + updateGL(); +} + +void GLControlWidget::setScale( double s ) +{ + scale = s; + updateGL(); +} + +void GLControlWidget::setXTrans( double x ) +{ + xTrans = x; + updateGL(); +} + +void GLControlWidget::setYTrans( double y ) +{ + yTrans = y; + updateGL(); +} + +void GLControlWidget::setZTrans( double z ) +{ + zTrans = z; + updateGL(); +} + +void GLControlWidget::setRotationImpulse( double x, double y, double z ) +{ + setXRotation( xRot + 180*x ); + setYRotation( yRot + 180*y ); + setZRotation( zRot - 180*z ); +} + +void GLControlWidget::setTranslationImpulse( double x, double y, double z ) +{ + setXTrans( xTrans + 2*x ); + setYTrans( yTrans - 2*y ); + setZTrans( zTrans + 2*z ); +} + +void GLControlWidget::mousePressEvent( QMouseEvent *e ) +{ + e->accept(); + oldPos = e->pos(); +} + +void GLControlWidget::mouseReleaseEvent( QMouseEvent *e ) +{ + e->accept(); + oldPos = e->pos(); +} + +void GLControlWidget::mouseMoveEvent( QMouseEvent *e ) +{ + e->accept(); + double dx = e->x() - oldPos.x(); + double dy = e->y() - oldPos.y(); + + oldPos = e->pos(); + + double rx = dx / width(); + double ry = dy / height(); + + if ( e->state() == LeftButton ) + setRotationImpulse( ry, rx, 0 ); + else if ( e->state() == RightButton ) + setRotationImpulse( ry, 0, rx ); + else if ( e->state() == MidButton ) + setTranslationImpulse( rx, ry, 0 ); + else if ( e->state() == ( LeftButton | RightButton ) ) + setTranslationImpulse( rx, 0, ry ); +} + +void GLControlWidget::wheelEvent( QWheelEvent *e ) +{ + e->accept(); + if ( scale <= ( (double)e->delta() / 1000 ) ) + return; + setScale( scale - ( (double)e->delta() / 1000 )); +} + +void GLControlWidget::mouseDoubleClickEvent( QMouseEvent * ) +{ + if ( delay <= 0 ) + return; + + animation = !animation; + if ( animation ) + timer->start( delay ); + else + timer->stop(); +} + +void GLControlWidget::showEvent( QShowEvent *e ) +{ + if ( wasAnimated && !timer->isActive() ) + timer->start( delay ); + + QGLWidget::showEvent( e ); +} + +void GLControlWidget::hideEvent( QHideEvent *e ) +{ + wasAnimated = timer->isActive(); + timer->stop(); + QGLWidget::hideEvent( e ); +} + +void GLControlWidget::animate() +{ +} + +void GLControlWidget::setAnimationDelay( int ms ) +{ + timer->stop(); + delay = ms; + if ( animation ) { + wasAnimated = TRUE; + timer->start( delay ); + } +} |