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diff --git a/doc/html/customlayout-example.html b/doc/html/customlayout-example.html new file mode 100644 index 0000000..a8f0ab2 --- /dev/null +++ b/doc/html/customlayout-example.html @@ -0,0 +1,851 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> +<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/examples/customlayout/customlayout.doc:4 --> +<html> +<head> +<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> +<title>Customized Layoutmanager</title> +<style type="text/css"><!-- +fn { margin-left: 1cm; text-indent: -1cm; } +a:link { color: #004faf; text-decoration: none } +a:visited { color: #672967; text-decoration: none } +body { background: #ffffff; color: black; } +--></style> +</head> +<body> + +<table border="0" cellpadding="0" cellspacing="0" width="100%"> +<tr bgcolor="#E5E5E5"> +<td valign=center> + <a href="index.html"> +<font color="#004faf">Home</font></a> + | <a href="classes.html"> +<font color="#004faf">All Classes</font></a> + | <a href="mainclasses.html"> +<font color="#004faf">Main Classes</font></a> + | <a href="annotated.html"> +<font color="#004faf">Annotated</font></a> + | <a href="groups.html"> +<font color="#004faf">Grouped Classes</font></a> + | <a href="functions.html"> +<font color="#004faf">Functions</font></a> +</td> +<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>Customized Layoutmanager</h1> + + +<p> +This examples demonstrates how to write customized layout (geometry) managers +like card layouts, border layout and flow layouts. +<p> See also: <a href="layout.html">Documentation of Geometry Management</a>. +<p> <hr> +<p> Header file of the flow layout: +<p> <pre>/**************************************************************************** +** $Id: qt/flow.h 3.3.8 edited Jan 11 14:46 $ +** +** Definition of simple flow layout for custom layout example +** +** Created : 979899 +** +** Copyright (C) 1997-2007 Trolltech ASA. 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 FLOW_H +#define FLOW_H + +#include <<a href="qlayout-h.html">qlayout.h</a>> +#include <<a href="qptrlist-h.html">qptrlist.h</a>> + +class SimpleFlow : public <a href="qlayout.html">QLayout</a> +{ +public: + SimpleFlow( <a href="qwidget.html">QWidget</a> *parent, int border=0, int space=-1, + const char *name=0 ) + : <a href="qlayout.html">QLayout</a>( parent, border, space, name ), + cached_width(0) {} + SimpleFlow( <a href="qlayout.html">QLayout</a>* parent, int space=-1, const char *name=0 ) + : <a href="qlayout.html">QLayout</a>( parent, space, name ), + cached_width(0) {} + SimpleFlow( int space=-1, const char *name=0 ) + : <a href="qlayout.html">QLayout</a>( space, name ), + cached_width(0) {} + + ~SimpleFlow(); + + void addItem( <a href="qlayoutitem.html">QLayoutItem</a> *item); + bool hasHeightForWidth() const; + int heightForWidth( int ) const; + <a href="qsize.html">QSize</a> sizeHint() const; + <a href="qsize.html">QSize</a> minimumSize() const; + <a href="qlayoutiterator.html">QLayoutIterator</a> iterator(); + QSizePolicy::ExpandData expanding() const; + +protected: + void setGeometry( const <a href="qrect.html">QRect</a>& ); + +private: + int doLayout( const <a href="qrect.html">QRect</a>&, bool testonly = FALSE ); + <a href="qptrlist.html">QPtrList</a><QLayoutItem> list; + int cached_width; + int cached_hfw; + +}; + +#endif +</pre> + +<p> <hr> +<p> Implementation of the flow layout: +<p> <pre>/**************************************************************************** +** $Id: qt/flow.cpp 3.3.8 edited Jan 11 14:46 $ +** +** Implementing your own layout: flow example +** +** Copyright (C) 1996-2007 Trolltech ASA. 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" + +class SimpleFlowIterator :public <a href="qglayoutiterator.html">QGLayoutIterator</a> +{ +public: + SimpleFlowIterator( <a href="qptrlist.html">QPtrList</a><QLayoutItem> *l ) :idx(0), list(l) {} + uint count() const; + <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="qptrlist.html">QPtrList</a><QLayoutItem> *list; + +}; + +uint <a name="f452"></a>SimpleFlowIterator::count() const +{ +<a name="x1479"></a> return list-><a href="qptrlist.html#count">count</a>(); +} + +<a name="x1464"></a>QLayoutItem *SimpleFlowIterator::<a href="qglayoutiterator.html#current">current</a>() +{ +<a name="x1478"></a> return idx < int(count()) ? list-><a href="qptrlist.html#at">at</a>(idx) : 0; +} + +<a name="x1465"></a>QLayoutItem *SimpleFlowIterator::<a href="qglayoutiterator.html#next">next</a>() +{ + idx++; return current(); +} + +<a name="x1466"></a>QLayoutItem *SimpleFlowIterator::<a href="qglayoutiterator.html#takeCurrent">takeCurrent</a>() +{ +<a name="x1480"></a> return idx < int(count()) ? list-><a href="qptrlist.html#take">take</a>( idx ) : 0; +} + +SimpleFlow::~SimpleFlow() +{ + <a href="qlayout.html#deleteAllItems">deleteAllItems</a>(); +} + + +<a name="x1473"></a>int SimpleFlow::<a href="qlayoutitem.html#heightForWidth">heightForWidth</a>( int w ) const +{ + if ( cached_width != w ) { + //Not all C++ compilers support "mutable" yet: + SimpleFlow * mthis = (SimpleFlow*)this; + int h = mthis->doLayout( QRect(0,0,w,0), TRUE ); + mthis->cached_hfw = h; + mthis->cached_width = w; + return h; + } + return cached_hfw; +} + +<a name="x1467"></a>void SimpleFlow::<a href="qlayout.html#addItem">addItem</a>( <a href="qlayoutitem.html">QLayoutItem</a> *item) +{ +<a name="x1477"></a> list.<a href="qptrlist.html#append">append</a>( item ); +} + +<a name="x1472"></a>bool SimpleFlow::<a href="qlayoutitem.html#hasHeightForWidth">hasHeightForWidth</a>() const +{ + return TRUE; +} + +<a name="x1476"></a>QSize SimpleFlow::<a href="qlayoutitem.html#sizeHint">sizeHint</a>() const +{ + return minimumSize(); +} + +<a name="x1468"></a>QSizePolicy::ExpandData SimpleFlow::<a href="qlayout.html#expanding">expanding</a>() const +{ + return QSizePolicy::NoDirection; +} + +<a name="x1469"></a>QLayoutIterator SimpleFlow::<a href="qlayout.html#iterator">iterator</a>() +{ + return QLayoutIterator( new SimpleFlowIterator( &list ) ); +} + +<a name="x1471"></a>void SimpleFlow::<a href="qlayout.html#setGeometry">setGeometry</a>( const <a href="qrect.html">QRect</a> &r ) +{ + QLayout::<a href="qlayout.html#setGeometry">setGeometry</a>( r ); + doLayout( r ); +} + +int <a name="f451"></a>SimpleFlow::doLayout( const <a href="qrect.html">QRect</a> &r, bool testonly ) +{ + int x = r.<a href="qrect.html#x">x</a>(); + int y = r.<a href="qrect.html#y">y</a>(); + int h = 0; //height of this line so far. + <a href="qptrlistiterator.html">QPtrListIterator</a><QLayoutItem> it(list); + <a href="qlayoutitem.html">QLayoutItem</a> *o; +<a name="x1481"></a> while ( (o=it.<a href="qptrlistiterator.html#current">current</a>()) != 0 ) { + ++it; + int nextX = x + o-><a href="qlayoutitem.html#sizeHint">sizeHint</a>().width() + spacing(); +<a name="x1482"></a> if ( nextX - spacing() > r.<a href="qrect.html#right">right</a>() && h > 0 ) { + x = r.<a href="qrect.html#x">x</a>(); + y = y + h + spacing(); + nextX = x + o-><a href="qlayoutitem.html#sizeHint">sizeHint</a>().width() + spacing(); + h = 0; + } + if ( !testonly ) +<a name="x1475"></a> o-><a href="qlayoutitem.html#setGeometry">setGeometry</a>( QRect( QPoint( x, y ), o-><a href="qlayoutitem.html#sizeHint">sizeHint</a>() ) ); + x = nextX; + h = QMAX( h, o-><a href="qlayoutitem.html#sizeHint">sizeHint</a>().height() ); + } + return y + h - r.<a href="qrect.html#y">y</a>(); +} + +<a name="x1470"></a>QSize SimpleFlow::<a href="qlayout.html#minimumSize">minimumSize</a>() const +{ + <a href="qsize.html">QSize</a> s(0,0); + <a href="qptrlistiterator.html">QPtrListIterator</a><QLayoutItem> it(list); + <a href="qlayoutitem.html">QLayoutItem</a> *o; + while ( (o=it.<a href="qptrlistiterator.html#current">current</a>()) != 0 ) { + ++it; +<a name="x1485"></a><a name="x1474"></a> s = s.<a href="qsize.html#expandedTo">expandedTo</a>( o-><a href="qlayoutitem.html#minimumSize">minimumSize</a>() ); + } + return s; +} +</pre> + +<p> <hr> +<p> Header file of the border layout: +<p> <pre>/**************************************************************************** +** $Id: qt/border.h 3.3.8 edited Jan 11 14:46 $ +** +** Definition of simple flow layout for custom layout example +** +** Created : 979899 +** +** Copyright (C) 1997-2007 Trolltech ASA. 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 BORDER_H +#define BORDER_H + +#include <<a href="qlayout-h.html">qlayout.h</a>> +#include <<a href="qptrlist-h.html">qptrlist.h</a>> + +class BorderWidgetItem : public <a href="qwidgetitem.html">QWidgetItem</a> +{ +public: + BorderWidgetItem( <a href="qwidget.html">QWidget</a> *w ) + : <a href="qwidgetitem.html">QWidgetItem</a>( w ) + {} + + void setGeometry( const <a href="qrect.html">QRect</a> &r ) + { widget()->setGeometry( r ); } + +}; + +class BorderLayout : public <a href="qlayout.html">QLayout</a> +{ +public: + enum Position { + West = 0, + North, + South, + East, + Center + }; + + struct BorderLayoutStruct + { + BorderLayoutStruct( <a href="qlayoutitem.html">QLayoutItem</a> *i, Position p ) { + item = i; + pos = p; + } + + <a href="qlayoutitem.html">QLayoutItem</a> *item; + Position pos; + }; + + enum SizeType { + Minimum = 0, + SizeHint + }; + + BorderLayout( <a href="qwidget.html">QWidget</a> *parent, int border = 0, int autoBorder = -1, + const char *name = 0 ) + : <a href="qlayout.html">QLayout</a>( parent, border, autoBorder, name ), cached( 0, 0 ), mcached( 0, 0 ), + sizeDirty( TRUE ), msizeDirty( TRUE ) + {} + + BorderLayout( <a href="qlayout.html">QLayout</a>* parent, int autoBorder = -1, const char *name = 0 ) + : <a href="qlayout.html">QLayout</a>( parent, autoBorder, name ), cached( 0, 0 ), mcached( 0, 0 ), + sizeDirty( TRUE ), msizeDirty( TRUE ) + {} + + BorderLayout( int autoBorder = -1, const char *name = 0 ) + : <a href="qlayout.html">QLayout</a>( autoBorder, name ), cached( 0, 0 ), mcached( 0, 0 ), + sizeDirty( TRUE ), msizeDirty( TRUE ) + {} + + ~BorderLayout(); + + void addItem( <a href="qlayoutitem.html">QLayoutItem</a> *item ); + + void addWidget( <a href="qwidget.html">QWidget</a> *widget, Position pos ); + void add( <a href="qlayoutitem.html">QLayoutItem</a> *item, Position pos ); + + bool hasHeightForWidth() const; + + <a href="qsize.html">QSize</a> sizeHint() const; + <a href="qsize.html">QSize</a> minimumSize() const; + + <a href="qlayoutiterator.html">QLayoutIterator</a> iterator(); + + QSizePolicy::ExpandData expanding() const; + +protected: + void setGeometry( const <a href="qrect.html">QRect</a> &rect ); + +private: + void doLayout( const <a href="qrect.html">QRect</a> &rect, bool testonly = FALSE ); + void calcSize( SizeType st ); + + <a href="qptrlist.html">QPtrList</a><BorderLayoutStruct> list; + <a href="qsize.html">QSize</a> cached, mcached; + bool sizeDirty, msizeDirty; + +}; + +#endif +</pre> + +<p> <hr> +<p> Implementation of the border layout: +<p> <pre>/**************************************************************************** +** $Id: qt/border.cpp 3.3.8 edited Jan 11 14:46 $ +** +** Implementing your own layout: flow example +** +** Copyright (C) 1996-2007 Trolltech ASA. 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 "border.h" + +class BorderLayoutIterator : public <a href="qglayoutiterator.html">QGLayoutIterator</a> +{ +public: + BorderLayoutIterator( const <a href="qptrlist.html">QPtrList</a><BorderLayout::BorderLayoutStruct> *l ) + : idx( 0 ) , list( (QPtrList<BorderLayout::BorderLayoutStruct>*)l ) + {} + + uint count() const; + <a href="qlayoutitem.html">QLayoutItem</a> *current(); + BorderLayout::BorderLayoutStruct *currentStruct(); + void toFirst(); + <a href="qlayoutitem.html">QLayoutItem</a> *next(); + <a href="qlayoutitem.html">QLayoutItem</a> *takeCurrent(); + BorderLayoutIterator &operator++(); + +private: + int idx; + <a href="qptrlist.html">QPtrList</a><BorderLayout::BorderLayoutStruct> *list; + +}; + +uint <a name="f456"></a>BorderLayoutIterator::count() const +{ +<a name="x1502"></a> return list-><a href="qptrlist.html#count">count</a>(); +} + +<a name="x1486"></a>QLayoutItem *BorderLayoutIterator::<a href="qglayoutiterator.html#current">current</a>() +{ +<a name="x1501"></a> return idx < (int)count() ? list-><a href="qptrlist.html#at">at</a>( idx )->item : 0; +} + +BorderLayout::BorderLayoutStruct *<a name="f457"></a>BorderLayoutIterator::currentStruct() +{ + return idx < (int)count() ? list-><a href="qptrlist.html#at">at</a>( idx ) : 0; +} + +void <a name="f458"></a>BorderLayoutIterator::toFirst() +{ + idx = 0; +} + +<a name="x1487"></a>QLayoutItem *BorderLayoutIterator::<a href="qglayoutiterator.html#next">next</a>() +{ + idx++; + return current(); +} + +<a name="x1488"></a>QLayoutItem *BorderLayoutIterator::<a href="qglayoutiterator.html#takeCurrent">takeCurrent</a>() +{ + BorderLayout::BorderLayoutStruct *b +<a name="x1503"></a> = idx < int( list-><a href="qptrlist.html#count">count</a>() ) ? list-><a href="qptrlist.html#take">take</a>( idx ) : 0; + <a href="qlayoutitem.html">QLayoutItem</a> *item = b ? b->item : 0; + delete b; + return item; +} + +BorderLayoutIterator &BorderLayoutIterator::operator++() +{ + next(); + return *this; +} + +BorderLayout::~BorderLayout() +{ + <a href="qlayout.html#deleteAllItems">deleteAllItems</a>(); +} + + +<a name="x1490"></a>void BorderLayout::<a href="qlayout.html#addItem">addItem</a>( <a href="qlayoutitem.html">QLayoutItem</a> *item ) +{ + <a href="qlayout.html#add">add</a>( item, West ); +} + +void <a name="f453"></a>BorderLayout::addWidget( <a href="qwidget.html">QWidget</a> *widget, Position pos ) +{ + <a href="qlayout.html#add">add</a>( new BorderWidgetItem( widget ), pos ); +} + +<a name="x1489"></a>void BorderLayout::<a href="qlayout.html#add">add</a>( <a href="qlayoutitem.html">QLayoutItem</a> *item, Position pos ) +{ +<a name="x1500"></a> list.<a href="qptrlist.html#append">append</a>( new BorderLayoutStruct( item, pos ) ); + sizeDirty = TRUE; msizeDirty = TRUE; + calcSize( SizeHint ); calcSize( Minimum ); +} + +<a name="x1496"></a>bool BorderLayout::<a href="qlayoutitem.html#hasHeightForWidth">hasHeightForWidth</a>() const +{ + return FALSE; +} + +<a name="x1499"></a>QSize BorderLayout::<a href="qlayoutitem.html#sizeHint">sizeHint</a>() const +{ + return cached; +} + +<a name="x1493"></a>QSize BorderLayout::<a href="qlayout.html#minimumSize">minimumSize</a>() const +{ + return cached; +} + +<a name="x1491"></a>QSizePolicy::ExpandData BorderLayout::<a href="qlayout.html#expanding">expanding</a>() const + +{ + return QSizePolicy::BothDirections; +} + +<a name="x1492"></a>QLayoutIterator BorderLayout::<a href="qlayout.html#iterator">iterator</a>() +{ + return QLayoutIterator( new BorderLayoutIterator( &list ) ); +} + +<a name="x1494"></a>void BorderLayout::<a href="qlayout.html#setGeometry">setGeometry</a>( const <a href="qrect.html">QRect</a> &rct ) +{ + QLayout::<a href="qlayout.html#setGeometry">setGeometry</a>( rct ); + doLayout( rct ); +} + +void <a name="f454"></a>BorderLayout::doLayout( const <a href="qrect.html">QRect</a> &rct, bool /*testonly*/ ) +{ + int ew = 0, ww = 0, nh = 0, sh = 0; + int h = 0; + + BorderLayoutIterator it( &list ); + BorderLayoutStruct *o; + BorderLayoutStruct *center = 0; + while ( ( o = it.currentStruct() ) != 0 ) { + ++it; + + if ( o->pos == North ) { +<a name="x1506"></a><a name="x1505"></a><a name="x1498"></a> o->item-><a href="qlayoutitem.html#setGeometry">setGeometry</a>( QRect( rct.<a href="qrect.html#x">x</a>(), nh, rct.<a href="qrect.html#width">width</a>(), o->item-><a href="qlayoutitem.html#sizeHint">sizeHint</a>().height() ) ); +<a name="x1495"></a> nh += o->item-><a href="qlayoutitem.html#geometry">geometry</a>().height() + spacing(); + } + if ( o->pos == South ) { + o->item-><a href="qlayoutitem.html#setGeometry">setGeometry</a>( QRect( o->item-><a href="qlayoutitem.html#geometry">geometry</a>().x(), o->item-><a href="qlayoutitem.html#geometry">geometry</a>().y(), + rct.<a href="qrect.html#width">width</a>(), o->item-><a href="qlayoutitem.html#sizeHint">sizeHint</a>().height() ) ); + sh += o->item-><a href="qlayoutitem.html#geometry">geometry</a>().height() + spacing(); + o->item-><a href="qlayoutitem.html#setGeometry">setGeometry</a>( QRect( rct.<a href="qrect.html#x">x</a>(), rct.<a href="qrect.html#y">y</a>() + rct.<a href="qrect.html#height">height</a>() - sh + spacing(), + o->item-><a href="qlayoutitem.html#geometry">geometry</a>().width(), o->item-><a href="qlayoutitem.html#geometry">geometry</a>().height() ) ); + } + if ( o->pos == Center ) + center = o; + } + + h = rct.<a href="qrect.html#height">height</a>() - nh - sh; + + it.toFirst(); + while ( ( o = it.currentStruct() ) != 0 ) { + ++it; + + if ( o->pos == West ) { + o->item-><a href="qlayoutitem.html#setGeometry">setGeometry</a>( QRect( rct.<a href="qrect.html#x">x</a>() + ww, nh, o->item-><a href="qlayoutitem.html#sizeHint">sizeHint</a>().width(), h ) ); + ww += o->item-><a href="qlayoutitem.html#geometry">geometry</a>().width() + spacing(); + } + if ( o->pos == East ) { + o->item-><a href="qlayoutitem.html#setGeometry">setGeometry</a>( QRect( o->item-><a href="qlayoutitem.html#geometry">geometry</a>().x(), o->item-><a href="qlayoutitem.html#geometry">geometry</a>().y(), + o->item-><a href="qlayoutitem.html#sizeHint">sizeHint</a>().width(), h ) ); + ew += o->item-><a href="qlayoutitem.html#geometry">geometry</a>().width() + spacing(); + o->item-><a href="qlayoutitem.html#setGeometry">setGeometry</a>( QRect( rct.<a href="qrect.html#x">x</a>() + rct.<a href="qrect.html#width">width</a>() - ew + spacing(), nh, + o->item-><a href="qlayoutitem.html#geometry">geometry</a>().width(), o->item-><a href="qlayoutitem.html#geometry">geometry</a>().height() ) ); + } + } + + if ( center ) + center->item-><a href="qlayoutitem.html#setGeometry">setGeometry</a>( QRect( ww, nh, rct.<a href="qrect.html#width">width</a>() - ew - ww, h ) ); +} + +void <a name="f455"></a>BorderLayout::calcSize( SizeType st ) +{ + if ( ( st == Minimum && !msizeDirty ) || + ( st == SizeHint && !sizeDirty ) ) + return; + + int w = 0, h = 0; + + BorderLayoutIterator it( &list ); + BorderLayoutStruct *o; + while ( ( o = it.currentStruct() ) != 0 ) { + ++it; + if ( o->pos == North || + o->pos == South ) { + if ( st == Minimum ) +<a name="x1497"></a> h += o->item-><a href="qlayoutitem.html#minimumSize">minimumSize</a>().height(); + else + h += o->item-><a href="qlayoutitem.html#sizeHint">sizeHint</a>().height(); + } + else if ( o->pos == West || + o->pos == East ) { + if ( st == Minimum ) + w += o->item-><a href="qlayoutitem.html#minimumSize">minimumSize</a>().width(); + else + w += o->item-><a href="qlayoutitem.html#sizeHint">sizeHint</a>().width(); + } else { + if ( st == Minimum ) { + h += o->item-><a href="qlayoutitem.html#minimumSize">minimumSize</a>().height(); + w += o->item-><a href="qlayoutitem.html#minimumSize">minimumSize</a>().width(); + } + else { + h += o->item-><a href="qlayoutitem.html#sizeHint">sizeHint</a>().height(); + w += o->item-><a href="qlayoutitem.html#sizeHint">sizeHint</a>().width(); + } + } + } + + if ( st == Minimum ) { + msizeDirty = FALSE; + mcached = QSize( w, h ); + } else { + sizeDirty = FALSE; + cached = QSize( w, h ); + } + + return; +} +</pre> + +<p> <hr> +<p> Header file of the card layout: +<p> <pre>/**************************************************************************** +** $Id: qt/card.h 3.3.8 edited Jan 11 14:46 $ +** +** Definition of simple flow layout for custom layout example +** +** Created : 979899 +** +** Copyright (C) 1997-2007 Trolltech ASA. 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 <<a href="qlayout-h.html">qlayout.h</a>> +#include <<a href="qptrlist-h.html">qptrlist.h</a>> + +class CardLayout : public <a href="qlayout.html">QLayout</a> +{ +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 <a href="qrect.html">QRect</a> &rect ); + +private: + <a href="qptrlist.html">QPtrList</a><QLayoutItem> list; + +}; + +#endif +</pre> + +<p> <hr> +<p> Implementation of the card layout: +<p> <pre>/**************************************************************************** +** $Id: qt/card.cpp 3.3.8 edited Jan 11 14:46 $ +** +** Implementing your own layout: flow example +** +** Copyright (C) 1996-2007 Trolltech ASA. 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 <a href="qglayoutiterator.html">QGLayoutIterator</a> +{ +public: + CardLayoutIterator( <a href="qptrlist.html">QPtrList</a><QLayoutItem> *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="qptrlist.html">QPtrList</a><QLayoutItem> *list; +}; + +<a name="x1508"></a>QLayoutItem *CardLayoutIterator::<a href="qglayoutiterator.html#current">current</a>() +{ +<a name="x1520"></a><a name="x1519"></a> return idx < int( list-><a href="qptrlist.html#count">count</a>() ) ? list-><a href="qptrlist.html#at">at</a>( idx ) : 0; +} + +<a name="x1509"></a>QLayoutItem *CardLayoutIterator::<a href="qglayoutiterator.html#next">next</a>() +{ + idx++; return current(); +} + +<a name="x1510"></a>QLayoutItem *CardLayoutIterator::<a href="qglayoutiterator.html#takeCurrent">takeCurrent</a>() +{ +<a name="x1521"></a> return idx < int( list-><a href="qptrlist.html#count">count</a>() ) ?list-><a href="qptrlist.html#take">take</a>( idx ) : 0; +} + + + +<a name="x1512"></a>QLayoutIterator CardLayout::<a href="qlayout.html#iterator">iterator</a>() +{ + return QLayoutIterator( new CardLayoutIterator( &list ) ); +} + +CardLayout::~CardLayout() +{ + <a href="qlayout.html#deleteAllItems">deleteAllItems</a>(); +} + +<a name="x1511"></a>void CardLayout::<a href="qlayout.html#addItem">addItem</a>( <a href="qlayoutitem.html">QLayoutItem</a> *item ) +{ +<a name="x1518"></a> list.<a href="qptrlist.html#append">append</a>( item ); +} + +<a name="x1514"></a>void CardLayout::<a href="qlayout.html#setGeometry">setGeometry</a>( const <a href="qrect.html">QRect</a> &rct ) +{ + QLayout::<a href="qlayout.html#setGeometry">setGeometry</a>( rct ); + + <a href="qptrlistiterator.html">QPtrListIterator</a><QLayoutItem> it( list ); +<a name="x1522"></a> if ( it.<a href="qptrlistiterator.html#count">count</a>() == 0 ) + return; + + <a href="qlayoutitem.html">QLayoutItem</a> *o; + + int i = 0; + + int w = rct.<a href="qrect.html#width">width</a>() - ( list.<a href="qptrlist.html#count">count</a>() - 1 ) * spacing(); + int h = rct.<a href="qrect.html#height">height</a>() - ( list.<a href="qptrlist.html#count">count</a>() - 1 ) * spacing(); + +<a name="x1523"></a> while ( ( o=it.<a href="qptrlistiterator.html#current">current</a>() ) != 0 ) { + ++it; + <a href="qrect.html">QRect</a> geom( rct.<a href="qrect.html#x">x</a>() + i * spacing(), rct.<a href="qrect.html#y">y</a>() + i * spacing(), + w, h ); +<a name="x1516"></a> o-><a href="qlayoutitem.html#setGeometry">setGeometry</a>( geom ); + ++i; + } +} + +<a name="x1517"></a>QSize CardLayout::<a href="qlayoutitem.html#sizeHint">sizeHint</a>() const +{ + <a href="qsize.html">QSize</a> s(0,0); + int n = list.<a href="qptrlist.html#count">count</a>(); + if ( n > 0 ) + s = QSize(100,70); //start with a nice default size + <a href="qptrlistiterator.html">QPtrListIterator</a><QLayoutItem> it(list); + <a href="qlayoutitem.html">QLayoutItem</a> *o; + while ( (o=it.<a href="qptrlistiterator.html#current">current</a>()) != 0 ) { + ++it; +<a name="x1528"></a><a name="x1515"></a> s = s.<a href="qsize.html#expandedTo">expandedTo</a>( o-><a href="qlayoutitem.html#minimumSize">minimumSize</a>() ); + } + return s + n*QSize(<a href="qlayout.html#spacing">spacing</a>(),spacing()); +} + +<a name="x1513"></a>QSize CardLayout::<a href="qlayout.html#minimumSize">minimumSize</a>() const +{ + <a href="qsize.html">QSize</a> s(0,0); + int n = list.<a href="qptrlist.html#count">count</a>(); + <a href="qptrlistiterator.html">QPtrListIterator</a><QLayoutItem> it(list); + <a href="qlayoutitem.html">QLayoutItem</a> *o; + while ( (o=it.<a href="qptrlistiterator.html#current">current</a>()) != 0 ) { + ++it; + s = s.<a href="qsize.html#expandedTo">expandedTo</a>( o-><a href="qlayoutitem.html#minimumSize">minimumSize</a>() ); + } + return s + n*QSize(<a href="qlayout.html#spacing">spacing</a>(),spacing()); +} +</pre> + +<p> <hr> +<p> Main: +<p> <pre>/**************************************************************************** +** $Id: qt/main.cpp 3.3.8 edited Jan 11 14:46 $ +** +** Main for custom layout example +** +** Copyright (C) 1996-2007 Trolltech ASA. 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 <<a href="qapplication-h.html">qapplication.h</a>> +#include <<a href="qlabel-h.html">qlabel.h</a>> +#include <<a href="qcolor-h.html">qcolor.h</a>> +#include <<a href="qgroupbox-h.html">qgroupbox.h</a>> +#include <<a href="qpushbutton-h.html">qpushbutton.h</a>> +#include <<a href="qmultilineedit-h.html">qmultilineedit.h</a>> +#include <<a href="qcolor-h.html">qcolor.h</a>> + +int main( int argc, char **argv ) +{ + <a href="qapplication.html">QApplication</a> a( argc, argv ); + + <a href="qwidget.html">QWidget</a> *f = new <a href="qwidget.html">QWidget</a>; + <a href="qboxlayout.html">QBoxLayout</a> *gm = new <a href="qvboxlayout.html">QVBoxLayout</a>( f, 5 ); + + SimpleFlow *b1 = new SimpleFlow( gm ); + +<a name="x1536"></a> b1-><a href="qlayout.html#add">add</a>( new <a href="qpushbutton.html">QPushButton</a>( "Short", f ) ); + b1-><a href="qlayout.html#add">add</a>( new <a href="qpushbutton.html">QPushButton</a>( "Longer", f ) ); + b1-><a href="qlayout.html#add">add</a>( new <a href="qpushbutton.html">QPushButton</a>( "Different text", f ) ); + b1-><a href="qlayout.html#add">add</a>( new <a href="qpushbutton.html">QPushButton</a>( "More text", f ) ); + b1-><a href="qlayout.html#add">add</a>( new <a href="qpushbutton.html">QPushButton</a>( "Even longer button text", f ) ); + <a href="qpushbutton.html">QPushButton</a>* qb = new <a href="qpushbutton.html">QPushButton</a>( "Quit", f ); + a.<a href="qobject.html#connect">connect</a>( qb, SIGNAL( <a href="qbutton.html#clicked">clicked</a>() ), SLOT( quit() ) ); + b1-><a href="qlayout.html#add">add</a>( qb ); + + <a href="qwidget.html">QWidget</a> *wid = new <a href="qwidget.html">QWidget</a>( f ); + + BorderLayout *large = new BorderLayout( wid ); +<a name="x1537"></a> large-><a href="qlayout.html#setSpacing">setSpacing</a>( 5 ); + large->addWidget( new <a href="qpushbutton.html">QPushButton</a>( "North", wid ), BorderLayout::North ); + large->addWidget( new <a href="qpushbutton.html">QPushButton</a>( "West", wid ), BorderLayout::West ); + <a href="qmultilineedit.html">QMultiLineEdit</a>* m = new <a href="qmultilineedit.html">QMultiLineEdit</a>( wid ); + m-><a href="qtextedit.html#setText">setText</a>( "Central\nWidget" ); + large->addWidget( m, BorderLayout::Center ); + <a href="qwidget.html">QWidget</a> *east1 = new <a href="qpushbutton.html">QPushButton</a>( "East", wid ); + large->addWidget( east1, BorderLayout::East ); + <a href="qwidget.html">QWidget</a> *east2 = new <a href="qpushbutton.html">QPushButton</a>( "East 2", wid ); + large->addWidget( east2 , BorderLayout::East ); + large->addWidget( new <a href="qpushbutton.html">QPushButton</a>( "South", wid ), BorderLayout::South ); + //Left-to-right tab order looks better: +<a name="x1542"></a> <a href="qwidget.html">QWidget</a>::<a href="qwidget.html#setTabOrder">setTabOrder</a>( east2, east1 ); + gm-><a href="qboxlayout.html#addWidget">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 ); +<a name="x1540"></a> crd-><a href="qwidget.html#setBackgroundColor">setBackgroundColor</a>( Qt::red ); + card-><a href="qlayout.html#add">add</a>( crd ); + crd = new <a href="qwidget.html">QWidget</a>( wid ); + crd-><a href="qwidget.html#setBackgroundColor">setBackgroundColor</a>( Qt::green ); + card-><a href="qlayout.html#add">add</a>( crd ); + crd = new <a href="qwidget.html">QWidget</a>( wid ); + crd-><a href="qwidget.html#setBackgroundColor">setBackgroundColor</a>( Qt::blue ); + card-><a href="qlayout.html#add">add</a>( crd ); + crd = new <a href="qwidget.html">QWidget</a>( wid ); + crd-><a href="qwidget.html#setBackgroundColor">setBackgroundColor</a>( Qt::white ); + card-><a href="qlayout.html#add">add</a>( crd ); + crd = new <a href="qwidget.html">QWidget</a>( wid ); + crd-><a href="qwidget.html#setBackgroundColor">setBackgroundColor</a>( Qt::black ); + card-><a href="qlayout.html#add">add</a>( crd ); + crd = new <a href="qwidget.html">QWidget</a>( wid ); + crd-><a href="qwidget.html#setBackgroundColor">setBackgroundColor</a>( Qt::yellow ); + card-><a href="qlayout.html#add">add</a>( crd ); + + gm-><a href="qboxlayout.html#addWidget">addWidget</a>( wid ); + + <a href="qlabel.html">QLabel</a>* s = new <a href="qlabel.html">QLabel</a>( f ); + s-><a href="qlabel.html#setText">setText</a>( "outermost box" ); + s-><a href="qframe.html#setFrameStyle">setFrameStyle</a>( QFrame::Panel | QFrame::Sunken ); + s-><a href="qlabel.html#setAlignment">setAlignment</a>( Qt::AlignVCenter | Qt::AlignHCenter ); + gm-><a href="qboxlayout.html#addWidget">addWidget</a>( s ); + a.<a href="qapplication.html#setMainWidget">setMainWidget</a>( f ); + f-><a href="qwidget.html#setCaption">setCaption</a>("Qt Example - Custom Layout"); + f-><a href="qwidget.html#show">show</a>(); + + int result = a.<a href="qapplication.html#exec">exec</a>(); + delete f; + return result; +} +</pre> + +<p>See also <a href="examples.html">Examples</a>. + +<!-- eof --> +<p><address><hr><div align=center> +<table width=100% cellspacing=0 border=0><tr> +<td>Copyright © 2007 +<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a> +<td align=right><div align=right>Qt 3.3.8</div> +</table></div></address></body> +</html> |