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** $Id:  qt/qhbox.cpp   3.0.3   edited Oct 12 12:18 $
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#include "qhbox.h"
#ifndef QT_NO_HBOX
#include "qlayout.h"
#include "qapplication.h"
#include "qobjectlist.h"


/*!
  \class QHBox qhbox.h
  \brief The QHBox widget provides horizontal geometry management for its children.

  \ingroup organizers
  \ingroup geomanagement
  \ingroup appearance

  All the horizontal box's children will be placed alongside each
  other and sized according to their sizeHint()s.

  Use setMargin() to add space around the edge, and use setSpacing() to
  add space between the widgets. Use setStretchFactor() if you want
  the widgets to be different sizes in proportion to one another.

  <img src=qhbox-m.png>

  \sa QHBoxLayout QVBox QGrid
*/


/*!
  Constructs an hbox widget with parent \a parent and name \a name.
  The parent, name and widget flags, \a f, are passed to the QFrame
  constructor.
 */
QHBox::QHBox( QWidget *parent, const char *name, WFlags f )
    :QFrame( parent, name, f )
{
    lay = new QHBoxLayout( this, frameWidth(), frameWidth(), name );
    lay->setAutoAdd( TRUE );
}


/*!
  Constructs a horizontal hbox if \a horizontal is TRUE, otherwise
  constructs a vertical hbox (also known as a vbox).

  This constructor is provided for the QVBox class. You should never need
  to use it directly.

  The \a parent, \a name and widget flags, \a f, are passed to the QFrame
  constructor.
*/

QHBox::QHBox( bool horizontal, QWidget *parent , const char *name, WFlags f )
    :QFrame( parent, name, f )
{
    lay = new QBoxLayout( this,
		       horizontal ? QBoxLayout::LeftToRight : QBoxLayout::Down,
			  frameWidth(), frameWidth(), name );
    lay->setAutoAdd( TRUE );
}

/*!\reimp
 */
void QHBox::frameChanged()
{
    if ( !layout() )
	return;
    layout()->setMargin( frameWidth() );
}


/*!
  Sets the spacing between the child widgets to \a space.
*/

void QHBox::setSpacing( int space )
{
    if ( layout() ) // ### why not use this->lay?
	layout()->setSpacing( space );
}


/*!
  \reimp
*/

QSize QHBox::sizeHint() const
{
    QWidget *mThis = (QWidget*)this;
    QApplication::sendPostedEvents( mThis, QEvent::ChildInserted );
    return QFrame::sizeHint();
}

/*!
  Sets the stretch factor of widget \a w to \a stretch.
  \sa QBoxLayout::setStretchFactor()
*/
bool QHBox::setStretchFactor( QWidget* w, int stretch )
{
    QWidget *mThis = (QWidget*)this;
    QApplication::sendPostedEvents( mThis, QEvent::ChildInserted );
    return lay->setStretchFactor( w, stretch );
}
#endif
