customlayout-main-cpp.html

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    if ( st == Minimum ) {
        msizeDirty = FALSE;
        mcached = QSize( w, h );
    } else {
        sizeDirty = FALSE;
        cached = QSize( w, h );
    }

    return;
}
</pre>


  <hr>

  Header file of the Card-Layout: <pre>/****************************************************************************
** &#36;Id&#58; qt/examples/customlayout/card.h   2.3.8   edited 2004-05-12 $
**
** Definition of simple flow layout for custom layout example
**
** Created : 979899
**
** Copyright (C) 1997 by 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.
**
*****************************************************************************/

#ifndef CARD_H
#define CARD_H

#include &lt;<a href="qlayout-h.html">qlayout.h</a>&gt;
#include &lt;<a href="qlist-h.html">qlist.h</a>&gt;

class CardLayout : public QLayout
{
public:
    CardLayout( <a href="qwidget.html">QWidget</a> *parent, int dist )
        : <a href="qlayout.html">QLayout</a>( parent, 0, dist ) {}
    CardLayout( <a href="qlayout.html">QLayout</a>* parent, int dist)
        : <a href="qlayout.html">QLayout</a>( parent, dist ) {}
    CardLayout( int dist )
        : <a href="qlayout.html">QLayout</a>( dist ) {}
    ~CardLayout();

    void addItem( <a href="qlayoutitem.html">QLayoutItem</a> *item );
    <a href="qsize.html">QSize</a> sizeHint() const;
    <a href="qsize.html">QSize</a> minimumSize() const;
    <a href="qlayoutiterator.html">QLayoutIterator</a> iterator();
    void setGeometry( const QRect &amp;rect );

private:
    <a href="qlist.html">QList</a>&lt;<a href="qlayoutitem.html">QLayoutItem</a>&gt; list;

};

#endif
</pre>


  <hr>

  Implementation of the Card-Layout: <pre>/****************************************************************************
** &#36;Id&#58; qt/examples/customlayout/card.cpp   2.3.8   edited 2004-05-12 $
**
** Implementing your own layout: flow example
**
** Copyright (C) 1996 by 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.
**
*****************************************************************************/

#include "card.h"

class CardLayoutIterator :public QGLayoutIterator
{
public:
    CardLayoutIterator( <a href="qlist.html">QList</a>&lt;<a href="qlayoutitem.html">QLayoutItem</a>&gt; *l )
        : idx( 0 ), list( l )  {}

    <a href="qlayoutitem.html">QLayoutItem</a> *current();
    <a href="qlayoutitem.html">QLayoutItem</a> *next();
    <a href="qlayoutitem.html">QLayoutItem</a> *takeCurrent();

private:
    int idx;
    <a href="qlist.html">QList</a>&lt;<a href="qlayoutitem.html">QLayoutItem</a>&gt; *list;
};

<a href="qlayoutitem.html">QLayoutItem</a> *<a name="291"></a>CardLayoutIterator::current()
{
    return idx &lt; int( list-&gt;<a href="qlist.html#359d9f">count</a>() ) ? list-&gt;<a href="qlist.html#0e7e42">at</a>( idx ) : 0;
}

<a href="qlayoutitem.html">QLayoutItem</a> *<a name="292"></a>CardLayoutIterator::next()
{
    idx++; return current();
}

<a href="qlayoutitem.html">QLayoutItem</a> *<a name="293"></a>CardLayoutIterator::takeCurrent()
{
    return idx &lt; int( list-&gt;<a href="qlist.html#359d9f">count</a>() ) ?list-&gt;<a href="qlist.html#0639ad">take</a>( idx ) : 0;
}

<a href="qlayoutiterator.html">QLayoutIterator</a> <a name="294"></a>CardLayout::iterator()
{
    return QLayoutIterator(  new CardLayoutIterator( &amp;list )  );
}

CardLayout::~CardLayout()
{
    deleteAllItems();
}

void <a name="295"></a>CardLayout::addItem(  <a href="qlayoutitem.html">QLayoutItem</a> *item  )
{
    list.<a href="qlist.html#c5746a">append</a>( item );
}

void <a name="296"></a>CardLayout::setGeometry( const QRect &amp;rct )
{
    <a href="qlayout.html#f1f752">QLayout::setGeometry</a>( rct );

    <a href="qlistiterator.html">QListIterator</a>&lt;<a href="qlayoutitem.html">QLayoutItem</a>&gt; it( list );
    if ( it.<a href="qlistiterator.html#e61e8b">count</a>() == 0 )
        return;

    <a href="qlayoutitem.html">QLayoutItem</a> *o;

    int i = 0;

    int w = rct.width() - ( list.<a href="qlist.html#359d9f">count</a>() - 1 ) * spacing();
    int h = rct.height() - ( list.<a href="qlist.html#359d9f">count</a>() - 1 ) * spacing();

    while ( ( o=it.<a href="qlistiterator.html#e58f06">current</a>() ) != 0 ) {
        ++it;
        <a href="qrect.html">QRect</a> geom( rct.x() + i * spacing(), rct.y() + i * spacing(),
                    w, h  );
        o-&gt;<a href="qlayoutitem.html#0c6928">setGeometry</a>(  geom  );
        ++i;
    }
}

<a href="qsize.html">QSize</a> <a name="297"></a>CardLayout::sizeHint() const
{
    <a href="qsize.html">QSize</a> s(0,0);
    int n = list.<a href="qlist.html#359d9f">count</a>();
    if ( n &gt; 0 )
        s = QSize(100,70); //start with a nice default size
    <a href="qlistiterator.html">QListIterator</a>&lt;<a href="qlayoutitem.html">QLayoutItem</a>&gt; it(list);
    <a href="qlayoutitem.html">QLayoutItem</a> *o;
    while ( (o=it.<a href="qlistiterator.html#e58f06">current</a>()) != 0 ) {
        ++it;
        s = s.<a href="qsize.html#a74829">expandedTo</a>( o-&gt;<a href="qlayoutitem.html#83838c">minimumSize</a>() );
    }
    return s + n*QSize(<a href="qlayout.html#372777">spacing</a>(),<a href="qlayout.html#372777">spacing</a>());
}

<a href="qsize.html">QSize</a> <a name="298"></a>CardLayout::minimumSize() const
{
    <a href="qsize.html">QSize</a> s(0,0);
    int n = list.<a href="qlist.html#359d9f">count</a>();
    <a href="qlistiterator.html">QListIterator</a>&lt;<a href="qlayoutitem.html">QLayoutItem</a>&gt; it(list);
    <a href="qlayoutitem.html">QLayoutItem</a> *o;
    while ( (o=it.<a href="qlistiterator.html#e58f06">current</a>()) != 0 ) {
        ++it;
        s = s.<a href="qsize.html#a74829">expandedTo</a>( o-&gt;<a href="qlayoutitem.html#83838c">minimumSize</a>() );
    }
    return s + n*QSize(<a href="qlayout.html#372777">spacing</a>(),<a href="qlayout.html#372777">spacing</a>());
}
</pre>


  <hr>

  Main:
<pre>/****************************************************************************
** &#36;Id&#58; qt/examples/customlayout/main.cpp   2.3.8   edited 2004-05-12 $
**
** Main for custom layout example
**
** Copyright (C) 1996 by 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.
**
*****************************************************************************/

#include "flow.h"
#include "border.h"
#include "card.h"

#include &lt;<a name="qapplication.h"></a><a href="qapplication-h.html">qapplication.h</a>&gt;
#include &lt;<a name="qlabel.h"></a><a href="qlabel-h.html">qlabel.h</a>&gt;
#include &lt;<a name="qcolor.h"></a><a href="qcolor-h.html">qcolor.h</a>&gt;
#include &lt;<a name="qgroupbox.h"></a><a href="qgroupbox-h.html">qgroupbox.h</a>&gt;
#include &lt;<a name="qpushbutton.h"></a><a href="qpushbutton-h.html">qpushbutton.h</a>&gt;
#include &lt;<a name="qmultilineedit.h"></a><a href="qmultilineedit-h.html">qmultilineedit.h</a>&gt;
#include &lt;<a href="qcolor-h.html">qcolor.h</a>&gt;

int main( int argc, char **argv )
{
    <a name="QApplication"></a><a href="qapplication.html">QApplication</a> a( argc, argv );

    <a name="QWidget"></a><a href="qwidget.html">QWidget</a> *f = new <a href="qwidget.html">QWidget</a>;
    <a name="QBoxLayout"></a><a href="qboxlayout.html">QBoxLayout</a> *gm = new <a name="QVBoxLayout"></a><a href="qvboxlayout.html">QVBoxLayout</a>( f, 5 );

    SimpleFlow *b1 = new SimpleFlow( gm );

    b1-&gt;<a name="add"></a><a href="qlayout.html#a9ddc3">add</a>( new QPushButton( "Short", f ) );
    b1-&gt;<a href="qlayout.html#a9ddc3">add</a>( new QPushButton( "Longer", f ) );
    b1-&gt;<a href="qlayout.html#a9ddc3">add</a>( new QPushButton( "Different text", f ) );
    b1-&gt;<a href="qlayout.html#a9ddc3">add</a>( new QPushButton( "More text", f ) );
    b1-&gt;<a href="qlayout.html#a9ddc3">add</a>( new QPushButton( "Even longer button text", f ) );
    <a name="QPushButton"></a><a href="qpushbutton.html">QPushButton</a>* qb = new <a href="qpushbutton.html">QPushButton</a>( "Quit", f );
    a.<a name="connect"></a><a href="qobject.html#fbde73">connect</a>( qb, SIGNAL( clicked() ), SLOT( quit() ) );
    b1-&gt;<a href="qlayout.html#a9ddc3">add</a>( qb );

    <a href="qwidget.html">QWidget</a> *wid = new <a href="qwidget.html">QWidget</a>( f );

    BorderLayout *large = new BorderLayout( wid );
    large-&gt;setSpacing( 5 );
    large-&gt;addWidget( new QPushButton( "North", wid ), BorderLayout::North );
    large-&gt;addWidget( new QPushButton( "West", wid ), BorderLayout::West );
    <a name="QMultiLineEdit"></a><a href="qmultilineedit.html">QMultiLineEdit</a>* m = new <a href="qmultilineedit.html">QMultiLineEdit</a>( wid );
    m-&gt;<a name="setText"></a><a href="qmultilineedit.html#3fd8c1">setText</a>( "Central\nWidget" );
    large-&gt;addWidget( m, BorderLayout::Center );
    <a href="qwidget.html">QWidget</a> *east1 = new <a href="qpushbutton.html">QPushButton</a>( "East", wid );
    large-&gt;addWidget( east1, BorderLayout::East );
    <a href="qwidget.html">QWidget</a> *east2 = new <a href="qpushbutton.html">QPushButton</a>( "East 2", wid );
    large-&gt;addWidget( east2 , BorderLayout::East );
    large-&gt;addWidget( new QPushButton( "South", wid ), BorderLayout::South );
    //Left-to-right tab order looks better:
    <a name="QWidget::setTabOrder"></a><a href="qwidget.html#20c984">QWidget::setTabOrder</a>( east2, east1 );
    gm-&gt;<a name="addWidget"></a><a href="qboxlayout.html#ebba99">addWidget</a>( wid );

    wid = new <a href="qwidget.html">QWidget</a>( f );
    CardLayout *card = new CardLayout( wid, 10 );

    <a href="qwidget.html">QWidget</a> *crd = new <a href="qwidget.html">QWidget</a>( wid );
    crd-&gt;<a name="setBackgroundColor"></a><a href="qwidget.html#c09181">setBackgroundColor</a>( Qt::red );
    card-&gt;<a href="qlayout.html#a9ddc3">add</a>( crd );
    crd = new <a href="qwidget.html">QWidget</a>( wid );
    crd-&gt;<a href="qwidget.html#c09181">setBackgroundColor</a>( Qt::green );
    card-&gt;<a href="qlayout.html#a9ddc3">add</a>( crd );
    crd = new <a href="qwidget.html">QWidget</a>( wid );
    crd-&gt;<a href="qwidget.html#c09181">setBackgroundColor</a>( Qt::blue );
    card-&gt;<a href="qlayout.html#a9ddc3">add</a>( crd );
    crd = new <a href="qwidget.html">QWidget</a>( wid );
    crd-&gt;<a href="qwidget.html#c09181">setBackgroundColor</a>( Qt::white );
    card-&gt;<a href="qlayout.html#a9ddc3">add</a>( crd );
    crd = new <a href="qwidget.html">QWidget</a>( wid );
    crd-&gt;<a href="qwidget.html#c09181">setBackgroundColor</a>( Qt::black );
    card-&gt;<a href="qlayout.html#a9ddc3">add</a>( crd );
    crd = new <a href="qwidget.html">QWidget</a>( wid );
    crd-&gt;<a href="qwidget.html#c09181">setBackgroundColor</a>( Qt::yellow );
    card-&gt;<a href="qlayout.html#a9ddc3">add</a>( crd );

    gm-&gt;<a href="qboxlayout.html#ebba99">addWidget</a>( wid );

    <a name="QLabel"></a><a href="qlabel.html">QLabel</a>* s = new <a href="qlabel.html">QLabel</a>( f );
    s-&gt;<a name="setText"></a><a href="qlabel.html#bc5ea6">setText</a>( "outermost box" );
    s-&gt;<a name="setFrameStyle"></a><a href="qframe.html#558f79">setFrameStyle</a>( QFrame::Panel | QFrame::Sunken );
    s-&gt;<a name="setAlignment"></a><a href="qlabel.html#4743c8">setAlignment</a>( Qt::AlignVCenter | Qt::AlignHCenter );
    gm-&gt;<a href="qboxlayout.html#ebba99">addWidget</a>( s );
    a.<a name="setMainWidget"></a><a href="qapplication.html#7ad759">setMainWidget</a>( f );
    f-&gt;<a name="setCaption"></a><a href="qwidget.html#d6a291">setCaption</a>("Qt Example - Custom Layout");
    f-&gt;<a name="show"></a><a href="qwidget.html#200ee5">show</a>();

    int result = a.<a name="exec"></a><a href="qapplication.html#84c7bf">exec</a>();
    delete f;
    return result;
}
</pre>
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