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-rw-r--r--kworldwatch/flow.cpp135
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diff --git a/kworldwatch/flow.cpp b/kworldwatch/flow.cpp
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+/****************************************************************************
+** $Id$
+**
+** 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 "flow.h"
+
+class SimpleFlowIterator :public QGLayoutIterator
+{
+public:
+ SimpleFlowIterator( QPtrList<QLayoutItem> *l ) :idx(0), list(l) {}
+ uint count() const;
+ QLayoutItem *current();
+ QLayoutItem *next();
+ QLayoutItem *takeCurrent();
+
+private:
+ int idx;
+ QPtrList<QLayoutItem> *list;
+
+};
+
+uint SimpleFlowIterator::count() const
+{
+ return list->count();
+}
+
+QLayoutItem *SimpleFlowIterator::current()
+{
+ return idx < int(count()) ? list->at(idx) : 0;
+}
+
+QLayoutItem *SimpleFlowIterator::next()
+{
+ idx++; return current();
+}
+
+QLayoutItem *SimpleFlowIterator::takeCurrent()
+{
+ return idx < int(count()) ? list->take( idx ) : 0;
+}
+
+SimpleFlow::~SimpleFlow()
+{
+ deleteAllItems();
+}
+
+
+int SimpleFlow::heightForWidth( 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;
+}
+
+void SimpleFlow::addItem( QLayoutItem *item)
+{
+ list.append( item );
+}
+
+bool SimpleFlow::hasHeightForWidth() const
+{
+ return TRUE;
+}
+
+QSize SimpleFlow::sizeHint() const
+{
+ return minimumSize();
+}
+
+QSizePolicy::ExpandData SimpleFlow::expanding() const
+{
+ return QSizePolicy::NoDirection;
+}
+
+QLayoutIterator SimpleFlow::iterator()
+{
+ return QLayoutIterator( new SimpleFlowIterator( &list ) );
+}
+
+void SimpleFlow::setGeometry( const QRect &r )
+{
+ QLayout::setGeometry( r );
+ doLayout( r );
+}
+
+int SimpleFlow::doLayout( const QRect &r, bool testonly )
+{
+ int x = r.x();
+ int y = r.y();
+ int h = 0; //height of this line so far.
+ QPtrListIterator<QLayoutItem> it(list);
+ QLayoutItem *o;
+ while ( (o=it.current()) != 0 ) {
+ ++it;
+ int nextX = x + o->sizeHint().width() + spacing();
+ if ( nextX - spacing() > r.right() && h > 0 ) {
+ x = r.x();
+ y = y + h + spacing();
+ nextX = x + o->sizeHint().width() + spacing();
+ h = 0;
+ }
+ if ( !testonly )
+ o->setGeometry( QRect( QPoint( x, y ), o->sizeHint() ) );
+ x = nextX;
+ h = QMAX( h, o->sizeHint().height() );
+ }
+ return y + h - r.y();
+}
+
+QSize SimpleFlow::minimumSize() const
+{
+ QSize s(0,0);
+ QPtrListIterator<QLayoutItem> it(list);
+ QLayoutItem *o;
+ while ( (o=it.current()) != 0 ) {
+ ++it;
+ s = s.expandedTo( o->minimumSize() );
+ }
+ return s;
+}
+