<!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 TQt. This example ** program may be used, distributed and modified without limitation. ** *****************************************************************************/ #ifndef FLOW_H #define FLOW_H #include <<a href="qlayout-h.html">ntqlayout.h</a>> #include <<a href="qptrlist-h.html">ntqptrlist.h</a>> class SimpleFlow : public <a href="ntqlayout.html">TQLayout</a> { public: SimpleFlow( <a href="ntqwidget.html">TQWidget</a> *parent, int border=0, int space=-1, const char *name=0 ) : <a href="ntqlayout.html">TQLayout</a>( parent, border, space, name ), cached_width(0) {} SimpleFlow( <a href="ntqlayout.html">TQLayout</a>* parent, int space=-1, const char *name=0 ) : <a href="ntqlayout.html">TQLayout</a>( parent, space, name ), cached_width(0) {} SimpleFlow( int space=-1, const char *name=0 ) : <a href="ntqlayout.html">TQLayout</a>( space, name ), cached_width(0) {} ~SimpleFlow(); void addItem( <a href="qlayoutitem.html">TQLayoutItem</a> *item); bool hasHeightForWidth() const; int heightForWidth( int ) const; <a href="ntqsize.html">TQSize</a> sizeHint() const; <a href="ntqsize.html">TQSize</a> minimumSize() const; <a href="qlayoutiterator.html">TQLayoutIterator</a> iterator(); TQSizePolicy::ExpandData expanding() const; protected: void setGeometry( const <a href="ntqrect.html">TQRect</a>& ); private: int doLayout( const <a href="ntqrect.html">TQRect</a>&, bool testonly = FALSE ); <a href="ntqptrlist.html">TQPtrList</a><TQLayoutItem> 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 TQt. This example ** program may be used, distributed and modified without limitation. ** *****************************************************************************/ #include "flow.h" class SimpleFlowIterator :public <a href="qglayoutiterator.html">TQGLayoutIterator</a> { public: SimpleFlowIterator( <a href="ntqptrlist.html">TQPtrList</a><TQLayoutItem> *l ) :idx(0), list(l) {} uint count() const; <a href="qlayoutitem.html">TQLayoutItem</a> *current(); <a href="qlayoutitem.html">TQLayoutItem</a> *next(); <a href="qlayoutitem.html">TQLayoutItem</a> *takeCurrent(); private: int idx; <a href="ntqptrlist.html">TQPtrList</a><TQLayoutItem> *list; }; uint <a name="f452"></a>SimpleFlowIterator::count() const { <a name="x1479"></a> return list-><a href="ntqptrlist.html#count">count</a>(); } <a name="x1464"></a>TQLayoutItem *SimpleFlowIterator::<a href="qglayoutiterator.html#current">current</a>() { <a name="x1478"></a> return idx < int(count()) ? list-><a href="ntqptrlist.html#at">at</a>(idx) : 0; } <a name="x1465"></a>TQLayoutItem *SimpleFlowIterator::<a href="qglayoutiterator.html#next">next</a>() { idx++; return current(); } <a name="x1466"></a>TQLayoutItem *SimpleFlowIterator::<a href="qglayoutiterator.html#takeCurrent">takeCurrent</a>() { <a name="x1480"></a> return idx < int(count()) ? list-><a href="ntqptrlist.html#take">take</a>( idx ) : 0; } SimpleFlow::~SimpleFlow() { <a href="ntqlayout.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( TQRect(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="ntqlayout.html#addItem">addItem</a>( <a href="qlayoutitem.html">TQLayoutItem</a> *item) { <a name="x1477"></a> list.<a href="ntqptrlist.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>TQSize SimpleFlow::<a href="qlayoutitem.html#sizeHint">sizeHint</a>() const { return minimumSize(); } <a name="x1468"></a>TQSizePolicy::ExpandData SimpleFlow::<a href="ntqlayout.html#expanding">expanding</a>() const { return TQSizePolicy::NoDirection; } <a name="x1469"></a>TQLayoutIterator SimpleFlow::<a href="ntqlayout.html#iterator">iterator</a>() { return TQLayoutIterator( new SimpleFlowIterator( &list ) ); } <a name="x1471"></a>void SimpleFlow::<a href="ntqlayout.html#setGeometry">setGeometry</a>( const <a href="ntqrect.html">TQRect</a> &r ) { TQLayout::<a href="ntqlayout.html#setGeometry">setGeometry</a>( r ); doLayout( r ); } int <a name="f451"></a>SimpleFlow::doLayout( const <a href="ntqrect.html">TQRect</a> &r, bool testonly ) { int x = r.<a href="ntqrect.html#x">x</a>(); int y = r.<a href="ntqrect.html#y">y</a>(); int h = 0; //height of this line so far. <a href="qptrlistiterator.html">TQPtrListIterator</a><TQLayoutItem> it(list); <a href="qlayoutitem.html">TQLayoutItem</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="ntqrect.html#right">right</a>() && h > 0 ) { x = r.<a href="ntqrect.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>( TQRect( TQPoint( x, y ), o-><a href="qlayoutitem.html#sizeHint">sizeHint</a>() ) ); x = nextX; h = TQMAX( h, o-><a href="qlayoutitem.html#sizeHint">sizeHint</a>().height() ); } return y + h - r.<a href="ntqrect.html#y">y</a>(); } <a name="x1470"></a>TQSize SimpleFlow::<a href="ntqlayout.html#minimumSize">minimumSize</a>() const { <a href="ntqsize.html">TQSize</a> s(0,0); <a href="qptrlistiterator.html">TQPtrListIterator</a><TQLayoutItem> it(list); <a href="qlayoutitem.html">TQLayoutItem</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="ntqsize.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 TQt. This example ** program may be used, distributed and modified without limitation. ** *****************************************************************************/ #ifndef BORDER_H #define BORDER_H #include <<a href="qlayout-h.html">ntqlayout.h</a>> #include <<a href="qptrlist-h.html">ntqptrlist.h</a>> class BorderWidgetItem : public <a href="qwidgetitem.html">TQWidgetItem</a> { public: BorderWidgetItem( <a href="ntqwidget.html">TQWidget</a> *w ) : <a href="qwidgetitem.html">TQWidgetItem</a>( w ) {} void setGeometry( const <a href="ntqrect.html">TQRect</a> &r ) { widget()->setGeometry( r ); } }; class BorderLayout : public <a href="ntqlayout.html">TQLayout</a> { public: enum Position { West = 0, North, South, East, Center }; struct BorderLayoutStruct { BorderLayoutStruct( <a href="qlayoutitem.html">TQLayoutItem</a> *i, Position p ) { item = i; pos = p; } <a href="qlayoutitem.html">TQLayoutItem</a> *item; Position pos; }; enum SizeType { Minimum = 0, SizeHint }; BorderLayout( <a href="ntqwidget.html">TQWidget</a> *parent, int border = 0, int autoBorder = -1, const char *name = 0 ) : <a href="ntqlayout.html">TQLayout</a>( parent, border, autoBorder, name ), cached( 0, 0 ), mcached( 0, 0 ), sizeDirty( TRUE ), msizeDirty( TRUE ) {} BorderLayout( <a href="ntqlayout.html">TQLayout</a>* parent, int autoBorder = -1, const char *name = 0 ) : <a href="ntqlayout.html">TQLayout</a>( parent, autoBorder, name ), cached( 0, 0 ), mcached( 0, 0 ), sizeDirty( TRUE ), msizeDirty( TRUE ) {} BorderLayout( int autoBorder = -1, const char *name = 0 ) : <a href="ntqlayout.html">TQLayout</a>( autoBorder, name ), cached( 0, 0 ), mcached( 0, 0 ), sizeDirty( TRUE ), msizeDirty( TRUE ) {} ~BorderLayout(); void addItem( <a href="qlayoutitem.html">TQLayoutItem</a> *item ); void addWidget( <a href="ntqwidget.html">TQWidget</a> *widget, Position pos ); void add( <a href="qlayoutitem.html">TQLayoutItem</a> *item, Position pos ); bool hasHeightForWidth() const; <a href="ntqsize.html">TQSize</a> sizeHint() const; <a href="ntqsize.html">TQSize</a> minimumSize() const; <a href="qlayoutiterator.html">TQLayoutIterator</a> iterator(); TQSizePolicy::ExpandData expanding() const; protected: void setGeometry( const <a href="ntqrect.html">TQRect</a> &rect ); private: void doLayout( const <a href="ntqrect.html">TQRect</a> &rect, bool testonly = FALSE ); void calcSize( SizeType st ); <a href="ntqptrlist.html">TQPtrList</a><BorderLayoutStruct> list; <a href="ntqsize.html">TQSize</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 TQt. This example ** program may be used, distributed and modified without limitation. ** *****************************************************************************/ #include "border.h" class BorderLayoutIterator : public <a href="qglayoutiterator.html">TQGLayoutIterator</a> { public: BorderLayoutIterator( const <a href="ntqptrlist.html">TQPtrList</a><BorderLayout::BorderLayoutStruct> *l ) : idx( 0 ) , list( (TQPtrList<BorderLayout::BorderLayoutStruct>*)l ) {} uint count() const; <a href="qlayoutitem.html">TQLayoutItem</a> *current(); BorderLayout::BorderLayoutStruct *currentStruct(); void toFirst(); <a href="qlayoutitem.html">TQLayoutItem</a> *next(); <a href="qlayoutitem.html">TQLayoutItem</a> *takeCurrent(); BorderLayoutIterator &operator++(); private: int idx; <a href="ntqptrlist.html">TQPtrList</a><BorderLayout::BorderLayoutStruct> *list; }; uint <a name="f456"></a>BorderLayoutIterator::count() const { <a name="x1502"></a> return list-><a href="ntqptrlist.html#count">count</a>(); } <a name="x1486"></a>TQLayoutItem *BorderLayoutIterator::<a href="qglayoutiterator.html#current">current</a>() { <a name="x1501"></a> return idx < (int)count() ? list-><a href="ntqptrlist.html#at">at</a>( idx )->item : 0; } BorderLayout::BorderLayoutStruct *<a name="f457"></a>BorderLayoutIterator::currentStruct() { return idx < (int)count() ? list-><a href="ntqptrlist.html#at">at</a>( idx ) : 0; } void <a name="f458"></a>BorderLayoutIterator::toFirst() { idx = 0; } <a name="x1487"></a>TQLayoutItem *BorderLayoutIterator::<a href="qglayoutiterator.html#next">next</a>() { idx++; return current(); } <a name="x1488"></a>TQLayoutItem *BorderLayoutIterator::<a href="qglayoutiterator.html#takeCurrent">takeCurrent</a>() { BorderLayout::BorderLayoutStruct *b <a name="x1503"></a> = idx < int( list-><a href="ntqptrlist.html#count">count</a>() ) ? list-><a href="ntqptrlist.html#take">take</a>( idx ) : 0; <a href="qlayoutitem.html">TQLayoutItem</a> *item = b ? b->item : 0; delete b; return item; } BorderLayoutIterator &BorderLayoutIterator::operator++() { next(); return *this; } BorderLayout::~BorderLayout() { <a href="ntqlayout.html#deleteAllItems">deleteAllItems</a>(); } <a name="x1490"></a>void BorderLayout::<a href="ntqlayout.html#addItem">addItem</a>( <a href="qlayoutitem.html">TQLayoutItem</a> *item ) { <a href="ntqlayout.html#add">add</a>( item, West ); } void <a name="f453"></a>BorderLayout::addWidget( <a href="ntqwidget.html">TQWidget</a> *widget, Position pos ) { <a href="ntqlayout.html#add">add</a>( new BorderWidgetItem( widget ), pos ); } <a name="x1489"></a>void BorderLayout::<a href="ntqlayout.html#add">add</a>( <a href="qlayoutitem.html">TQLayoutItem</a> *item, Position pos ) { <a name="x1500"></a> list.<a href="ntqptrlist.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>TQSize BorderLayout::<a href="qlayoutitem.html#sizeHint">sizeHint</a>() const { return cached; } <a name="x1493"></a>TQSize BorderLayout::<a href="ntqlayout.html#minimumSize">minimumSize</a>() const { return cached; } <a name="x1491"></a>TQSizePolicy::ExpandData BorderLayout::<a href="ntqlayout.html#expanding">expanding</a>() const { return TQSizePolicy::BothDirections; } <a name="x1492"></a>TQLayoutIterator BorderLayout::<a href="ntqlayout.html#iterator">iterator</a>() { return TQLayoutIterator( new BorderLayoutIterator( &list ) ); } <a name="x1494"></a>void BorderLayout::<a href="ntqlayout.html#setGeometry">setGeometry</a>( const <a href="ntqrect.html">TQRect</a> &rct ) { TQLayout::<a href="ntqlayout.html#setGeometry">setGeometry</a>( rct ); doLayout( rct ); } void <a name="f454"></a>BorderLayout::doLayout( const <a href="ntqrect.html">TQRect</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>( TQRect( rct.<a href="ntqrect.html#x">x</a>(), nh, rct.<a href="ntqrect.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>( TQRect( o->item-><a href="qlayoutitem.html#geometry">geometry</a>().x(), o->item-><a href="qlayoutitem.html#geometry">geometry</a>().y(), rct.<a href="ntqrect.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>( TQRect( rct.<a href="ntqrect.html#x">x</a>(), rct.<a href="ntqrect.html#y">y</a>() + rct.<a href="ntqrect.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="ntqrect.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>( TQRect( rct.<a href="ntqrect.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>( TQRect( 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>( TQRect( rct.<a href="ntqrect.html#x">x</a>() + rct.<a href="ntqrect.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>( TQRect( ww, nh, rct.<a href="ntqrect.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 = TQSize( w, h ); } else { sizeDirty = FALSE; cached = TQSize( 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 TQt. This example ** program may be used, distributed and modified without limitation. ** *****************************************************************************/ #ifndef CARD_H #define CARD_H #include <<a href="qlayout-h.html">ntqlayout.h</a>> #include <<a href="qptrlist-h.html">ntqptrlist.h</a>> class CardLayout : public <a href="ntqlayout.html">TQLayout</a> { public: CardLayout( <a href="ntqwidget.html">TQWidget</a> *parent, int dist ) : <a href="ntqlayout.html">TQLayout</a>( parent, 0, dist ) {} CardLayout( <a href="ntqlayout.html">TQLayout</a>* parent, int dist) : <a href="ntqlayout.html">TQLayout</a>( parent, dist ) {} CardLayout( int dist ) : <a href="ntqlayout.html">TQLayout</a>( dist ) {} ~CardLayout(); void addItem( <a href="qlayoutitem.html">TQLayoutItem</a> *item ); <a href="ntqsize.html">TQSize</a> sizeHint() const; <a href="ntqsize.html">TQSize</a> minimumSize() const; <a href="qlayoutiterator.html">TQLayoutIterator</a> iterator(); void setGeometry( const <a href="ntqrect.html">TQRect</a> &rect ); private: <a href="ntqptrlist.html">TQPtrList</a><TQLayoutItem> 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 TQt. This example ** program may be used, distributed and modified without limitation. ** *****************************************************************************/ #include "card.h" class CardLayoutIterator :public <a href="qglayoutiterator.html">TQGLayoutIterator</a> { public: CardLayoutIterator( <a href="ntqptrlist.html">TQPtrList</a><TQLayoutItem> *l ) : idx( 0 ), list( l ) {} <a href="qlayoutitem.html">TQLayoutItem</a> *current(); <a href="qlayoutitem.html">TQLayoutItem</a> *next(); <a href="qlayoutitem.html">TQLayoutItem</a> *takeCurrent(); private: int idx; <a href="ntqptrlist.html">TQPtrList</a><TQLayoutItem> *list; }; <a name="x1508"></a>TQLayoutItem *CardLayoutIterator::<a href="qglayoutiterator.html#current">current</a>() { <a name="x1520"></a><a name="x1519"></a> return idx < int( list-><a href="ntqptrlist.html#count">count</a>() ) ? list-><a href="ntqptrlist.html#at">at</a>( idx ) : 0; } <a name="x1509"></a>TQLayoutItem *CardLayoutIterator::<a href="qglayoutiterator.html#next">next</a>() { idx++; return current(); } <a name="x1510"></a>TQLayoutItem *CardLayoutIterator::<a href="qglayoutiterator.html#takeCurrent">takeCurrent</a>() { <a name="x1521"></a> return idx < int( list-><a href="ntqptrlist.html#count">count</a>() ) ?list-><a href="ntqptrlist.html#take">take</a>( idx ) : 0; } <a name="x1512"></a>TQLayoutIterator CardLayout::<a href="ntqlayout.html#iterator">iterator</a>() { return TQLayoutIterator( new CardLayoutIterator( &list ) ); } CardLayout::~CardLayout() { <a href="ntqlayout.html#deleteAllItems">deleteAllItems</a>(); } <a name="x1511"></a>void CardLayout::<a href="ntqlayout.html#addItem">addItem</a>( <a href="qlayoutitem.html">TQLayoutItem</a> *item ) { <a name="x1518"></a> list.<a href="ntqptrlist.html#append">append</a>( item ); } <a name="x1514"></a>void CardLayout::<a href="ntqlayout.html#setGeometry">setGeometry</a>( const <a href="ntqrect.html">TQRect</a> &rct ) { TQLayout::<a href="ntqlayout.html#setGeometry">setGeometry</a>( rct ); <a href="qptrlistiterator.html">TQPtrListIterator</a><TQLayoutItem> it( list ); <a name="x1522"></a> if ( it.<a href="qptrlistiterator.html#count">count</a>() == 0 ) return; <a href="qlayoutitem.html">TQLayoutItem</a> *o; int i = 0; int w = rct.<a href="ntqrect.html#width">width</a>() - ( list.<a href="ntqptrlist.html#count">count</a>() - 1 ) * spacing(); int h = rct.<a href="ntqrect.html#height">height</a>() - ( list.<a href="ntqptrlist.html#count">count</a>() - 1 ) * spacing(); <a name="x1523"></a> while ( ( o=it.<a href="qptrlistiterator.html#current">current</a>() ) != 0 ) { ++it; <a href="ntqrect.html">TQRect</a> geom( rct.<a href="ntqrect.html#x">x</a>() + i * spacing(), rct.<a href="ntqrect.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>TQSize CardLayout::<a href="qlayoutitem.html#sizeHint">sizeHint</a>() const { <a href="ntqsize.html">TQSize</a> s(0,0); int n = list.<a href="ntqptrlist.html#count">count</a>(); if ( n > 0 ) s = TQSize(100,70); //start with a nice default size <a href="qptrlistiterator.html">TQPtrListIterator</a><TQLayoutItem> it(list); <a href="qlayoutitem.html">TQLayoutItem</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="ntqsize.html#expandedTo">expandedTo</a>( o-><a href="qlayoutitem.html#minimumSize">minimumSize</a>() ); } return s + n*TQSize(<a href="ntqlayout.html#spacing">spacing</a>(),spacing()); } <a name="x1513"></a>TQSize CardLayout::<a href="ntqlayout.html#minimumSize">minimumSize</a>() const { <a href="ntqsize.html">TQSize</a> s(0,0); int n = list.<a href="ntqptrlist.html#count">count</a>(); <a href="qptrlistiterator.html">TQPtrListIterator</a><TQLayoutItem> it(list); <a href="qlayoutitem.html">TQLayoutItem</a> *o; while ( (o=it.<a href="qptrlistiterator.html#current">current</a>()) != 0 ) { ++it; s = s.<a href="ntqsize.html#expandedTo">expandedTo</a>( o-><a href="qlayoutitem.html#minimumSize">minimumSize</a>() ); } return s + n*TQSize(<a href="ntqlayout.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 TQt. 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">ntqapplication.h</a>> #include <<a href="qlabel-h.html">ntqlabel.h</a>> #include <<a href="qcolor-h.html">ntqcolor.h</a>> #include <<a href="qgroupbox-h.html">ntqgroupbox.h</a>> #include <<a href="qpushbutton-h.html">ntqpushbutton.h</a>> #include <<a href="qmultilineedit-h.html">ntqmultilineedit.h</a>> #include <<a href="qcolor-h.html">ntqcolor.h</a>> int main( int argc, char **argv ) { <a href="ntqapplication.html">TQApplication</a> a( argc, argv ); <a href="ntqwidget.html">TQWidget</a> *f = new <a href="ntqwidget.html">TQWidget</a>; <a href="qboxlayout.html">TQBoxLayout</a> *gm = new <a href="qvboxlayout.html">TQVBoxLayout</a>( f, 5 ); SimpleFlow *b1 = new SimpleFlow( gm ); <a name="x1536"></a> b1-><a href="ntqlayout.html#add">add</a>( new <a href="ntqpushbutton.html">TQPushButton</a>( "Short", f ) ); b1-><a href="ntqlayout.html#add">add</a>( new <a href="ntqpushbutton.html">TQPushButton</a>( "Longer", f ) ); b1-><a href="ntqlayout.html#add">add</a>( new <a href="ntqpushbutton.html">TQPushButton</a>( "Different text", f ) ); b1-><a href="ntqlayout.html#add">add</a>( new <a href="ntqpushbutton.html">TQPushButton</a>( "More text", f ) ); b1-><a href="ntqlayout.html#add">add</a>( new <a href="ntqpushbutton.html">TQPushButton</a>( "Even longer button text", f ) ); <a href="ntqpushbutton.html">TQPushButton</a>* qb = new <a href="ntqpushbutton.html">TQPushButton</a>( "Quit", f ); a.<a href="ntqobject.html#connect">connect</a>( qb, SIGNAL( <a href="ntqbutton.html#clicked">clicked</a>() ), SLOT( quit() ) ); b1-><a href="ntqlayout.html#add">add</a>( qb ); <a href="ntqwidget.html">TQWidget</a> *wid = new <a href="ntqwidget.html">TQWidget</a>( f ); BorderLayout *large = new BorderLayout( wid ); <a name="x1537"></a> large-><a href="ntqlayout.html#setSpacing">setSpacing</a>( 5 ); large->addWidget( new <a href="ntqpushbutton.html">TQPushButton</a>( "North", wid ), BorderLayout::North ); large->addWidget( new <a href="ntqpushbutton.html">TQPushButton</a>( "West", wid ), BorderLayout::West ); <a href="ntqmultilineedit.html">TQMultiLineEdit</a>* m = new <a href="ntqmultilineedit.html">TQMultiLineEdit</a>( wid ); m-><a href="ntqtextedit.html#setText">setText</a>( "Central\nWidget" ); large->addWidget( m, BorderLayout::Center ); <a href="ntqwidget.html">TQWidget</a> *east1 = new <a href="ntqpushbutton.html">TQPushButton</a>( "East", wid ); large->addWidget( east1, BorderLayout::East ); <a href="ntqwidget.html">TQWidget</a> *east2 = new <a href="ntqpushbutton.html">TQPushButton</a>( "East 2", wid ); large->addWidget( east2 , BorderLayout::East ); large->addWidget( new <a href="ntqpushbutton.html">TQPushButton</a>( "South", wid ), BorderLayout::South ); //Left-to-right tab order looks better: <a name="x1542"></a> <a href="ntqwidget.html">TQWidget</a>::<a href="ntqwidget.html#setTabOrder">setTabOrder</a>( east2, east1 ); gm-><a href="qboxlayout.html#addWidget">addWidget</a>( wid ); wid = new <a href="ntqwidget.html">TQWidget</a>( f ); CardLayout *card = new CardLayout( wid, 10 ); <a href="ntqwidget.html">TQWidget</a> *crd = new <a href="ntqwidget.html">TQWidget</a>( wid ); <a name="x1540"></a> crd-><a href="ntqwidget.html#setBackgroundColor">setBackgroundColor</a>( TQt::red ); card-><a href="ntqlayout.html#add">add</a>( crd ); crd = new <a href="ntqwidget.html">TQWidget</a>( wid ); crd-><a href="ntqwidget.html#setBackgroundColor">setBackgroundColor</a>( TQt::green ); card-><a href="ntqlayout.html#add">add</a>( crd ); crd = new <a href="ntqwidget.html">TQWidget</a>( wid ); crd-><a href="ntqwidget.html#setBackgroundColor">setBackgroundColor</a>( TQt::blue ); card-><a href="ntqlayout.html#add">add</a>( crd ); crd = new <a href="ntqwidget.html">TQWidget</a>( wid ); crd-><a href="ntqwidget.html#setBackgroundColor">setBackgroundColor</a>( TQt::white ); card-><a href="ntqlayout.html#add">add</a>( crd ); crd = new <a href="ntqwidget.html">TQWidget</a>( wid ); crd-><a href="ntqwidget.html#setBackgroundColor">setBackgroundColor</a>( TQt::black ); card-><a href="ntqlayout.html#add">add</a>( crd ); crd = new <a href="ntqwidget.html">TQWidget</a>( wid ); crd-><a href="ntqwidget.html#setBackgroundColor">setBackgroundColor</a>( TQt::yellow ); card-><a href="ntqlayout.html#add">add</a>( crd ); gm-><a href="qboxlayout.html#addWidget">addWidget</a>( wid ); <a href="ntqlabel.html">TQLabel</a>* s = new <a href="ntqlabel.html">TQLabel</a>( f ); s-><a href="ntqlabel.html#setText">setText</a>( "outermost box" ); s-><a href="ntqframe.html#setFrameStyle">setFrameStyle</a>( TQFrame::Panel | TQFrame::Sunken ); s-><a href="ntqlabel.html#setAlignment">setAlignment</a>( TQt::AlignVCenter | TQt::AlignHCenter ); gm-><a href="qboxlayout.html#addWidget">addWidget</a>( s ); a.<a href="ntqapplication.html#setMainWidget">setMainWidget</a>( f ); f-><a href="ntqwidget.html#setCaption">setCaption</a>("TQt Example - Custom Layout"); f-><a href="ntqwidget.html#show">show</a>(); int result = a.<a href="ntqapplication.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>TQt 3.3.8</div> </table></div></address></body> </html>