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path: root/microkde/KDGanttMinimizeSplitter.cpp
authorzautrix <zautrix>2004-06-26 19:01:18 (UTC)
committer zautrix <zautrix>2004-06-26 19:01:18 (UTC)
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tree2c3d4004fb21c72cba65793859f9bcd8ffd3a49c /microkde/KDGanttMinimizeSplitter.cpp
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+/* -*- Mode: C++ -*-
+ $Id$
+*/
+
+/****************************************************************************
+ ** Copyright (C) 2002-2004 Klarälvdalens Datakonsult AB. All rights reserved.
+ **
+ ** This file is part of the KDGantt library.
+ **
+ ** This file may be distributed and/or modified under the terms of the
+ ** GNU General Public License version 2 as published by the Free Software
+ ** Foundation and appearing in the file LICENSE.GPL included in the
+ ** packaging of this file.
+ **
+ ** Licensees holding valid commercial KDGantt licenses may use this file in
+ ** accordance with the KDGantt Commercial License Agreement provided with
+ ** the Software.
+ **
+ ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
+ ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ **
+ ** See http://www.klaralvdalens-datakonsult.se/Public/products/ for
+ ** information about KDGantt Commercial License Agreements.
+ **
+ ** Contact info@klaralvdalens-datakonsult.se if any conditions of this
+ ** licensing are not clear to you.
+ **
+ ** As a special exception, permission is given to link this program
+ ** with any edition of Qt, and distribute the resulting executable,
+ ** without including the source code for Qt in the source distribution.
+ **
+ **********************************************************************/
+
+#include "KDGanttMinimizeSplitter.h"
+#ifndef QT_NO_SPLITTER___
+
+#include "qpainter.h"
+#include "qdrawutil.h"
+#include "qbitmap.h"
+#if QT_VERSION >= 300
+#include "qptrlist.h"
+#include "qmemarray.h"
+#else
+#include <qlist.h>
+#include <qarray.h>
+#define QPtrList QList
+#define QMemArray QArray
+#endif
+#include "qlayoutengine_p.h"
+#include "qobjectlist.h"
+#include "qstyle.h"
+#include "qapplication.h" //sendPostedEvents
+#include <qvaluelist.h>
+#include <qcursor.h>
+#ifndef KDGANTT_MASTER_CVS
+//#include "KDGanttMinimizeSplitter.moc"
+#endif
+
+
+
+#ifndef DOXYGEN_SKIP_INTERNAL
+
+#if QT_VERSION >= 232
+static int mouseOffset;
+static int opaqueOldPos = -1; //### there's only one mouse, but this is a bit risky
+
+
+KDGanttSplitterHandle::KDGanttSplitterHandle( Qt::Orientation o,
+ KDGanttMinimizeSplitter *parent, const char * name )
+ : QWidget( parent, name ), _activeButton( 0 ), _collapsed( false )
+{
+
+ if ( QApplication::desktop()->width() > 320 && QApplication::desktop()->width() < 650 ) {
+ mSizeHint = QSize(7,7);
+ mUseOffset = true;
+ } else {
+ mSizeHint = QSize(6,6);
+ mUseOffset = false;
+ }
+ s = parent;
+ setOrientation(o);
+ setMouseTracking( true );
+ //setMaximumHeight( 5 ); // test only
+}
+
+QSize KDGanttSplitterHandle::sizeHint() const
+{
+ return mSizeHint;
+}
+
+void KDGanttSplitterHandle::setOrientation( Qt::Orientation o )
+{
+ orient = o;
+#ifndef QT_NO_CURSOR
+ if ( o == KDGanttMinimizeSplitter::Horizontal )
+ setCursor( splitHCursor );
+ else
+ setCursor( splitVCursor );
+#endif
+}
+
+
+void KDGanttSplitterHandle::mouseMoveEvent( QMouseEvent *e )
+{
+ updateCursor( e->pos() );
+ if ( !(e->state()&LeftButton) )
+ return;
+
+ if ( _activeButton != 0)
+ return;
+
+ QCOORD pos = s->pick(parentWidget()->mapFromGlobal(e->globalPos()))
+ - mouseOffset;
+ if ( true /*opaque()*/ ) {
+ s->moveSplitter( pos, id() );
+ } else {
+ int min = pos; int max = pos;
+ s->getRange( id(), &min, &max );
+ s->setRubberband( QMAX( min, QMIN(max, pos )));
+ }
+ _collapsed = false;
+}
+
+void KDGanttSplitterHandle::mousePressEvent( QMouseEvent *e )
+{
+ if ( e->button() == LeftButton ) {
+ _activeButton = onButton( e->pos() );
+ mouseOffset = s->pick(e->pos());
+ if ( _activeButton != 0)
+ repaint();
+ updateCursor( e->pos() );
+ }
+}
+
+void KDGanttSplitterHandle::updateCursor( const QPoint& p)
+{
+ if ( onButton( p ) != 0 ) {
+ setCursor( arrowCursor );
+ }
+ else {
+ if ( orient == KDGanttMinimizeSplitter::Horizontal )
+ setCursor( splitHCursor );
+ else
+ setCursor( splitVCursor );
+ }
+}
+void KDGanttSplitterHandle::toggle()
+{
+ int pos;
+ int min, max;
+ if ( !_collapsed ) {
+ s->expandPos( id(), &min, &max );
+ if ( s->minimizeDirection() == KDGanttMinimizeSplitter::Left
+ || s->minimizeDirection() == KDGanttMinimizeSplitter::Up ) {
+ pos = min;
+ }
+ else {
+ pos = max;
+ }
+
+ _origPos = s->pick(mapToParent( QPoint( 0,0 ) ));
+ s->moveSplitter( pos, id() );
+ _collapsed = true;
+ }
+ else {
+ s->moveSplitter( _origPos, id() );
+ _collapsed = false;
+ }
+}
+
+void KDGanttSplitterHandle::mouseReleaseEvent( QMouseEvent *e )
+{
+ if ( _activeButton != 0 ) {
+ if ( onButton( e->pos() ) == _activeButton )
+ {
+ toggle();
+ }
+ _activeButton = 0;
+ updateCursor( e->pos() );
+ }
+ else {
+ if ( !opaque() && e->button() == LeftButton ) {
+ QCOORD pos = s->pick(parentWidget()->mapFromGlobal(e->globalPos()))
+ - mouseOffset;
+ s->setRubberband( -1 );
+ s->moveSplitter( pos, id() );
+ }
+ }
+ repaint();
+}
+
+int KDGanttSplitterHandle::onButton( const QPoint& p )
+{
+ QValueList<QPointArray> list = buttonRegions();
+ int index = 1;
+ int add = 12;
+ for( QValueList<QPointArray>::Iterator it = list.begin(); it != list.end(); ++it ) {
+ QRect rect = (*it).boundingRect();
+ rect.setLeft( rect.left()- add );
+ rect.setRight( rect.right() + add);
+ rect.setTop( rect.top()- add );
+ rect.setBottom( rect.bottom() + add);
+ if ( rect.contains( p ) ) {
+ return index;
+ }
+ index++;
+ }
+ return 0;
+}
+
+
+QValueList<QPointArray> KDGanttSplitterHandle::buttonRegions()
+{
+ QValueList<QPointArray> list;
+
+ int sw = 8;
+ int yyy = 1;
+ int xxx = 1;
+ int voffset[] = { (int) -sw*3, (int) sw*3 };
+ for ( int i = 0; i < 2; i++ ) {
+ QPointArray arr;
+ if ( !_collapsed && s->minimizeDirection() == KDGanttMinimizeSplitter::Right ||
+ _collapsed && s->minimizeDirection() == KDGanttMinimizeSplitter::Left) {
+ int mid = height()/2 + voffset[i];
+ arr.setPoints( 3,
+ 1-xxx, mid - sw + 4,
+ sw-3-xxx, mid,
+ 1-xxx, mid + sw -4);
+ }
+ else if ( !_collapsed && s->minimizeDirection() == KDGanttMinimizeSplitter::Left ||
+ _collapsed && s->minimizeDirection() == KDGanttMinimizeSplitter::Right ) {
+ int mid = height()/2 + voffset[i];
+ arr.setPoints( 3,
+ sw-4, mid - sw + 4,
+ 0, mid,
+ sw-4, mid + sw - 4);
+ }
+ else if ( !_collapsed && s->minimizeDirection() == KDGanttMinimizeSplitter::Up ||
+ _collapsed && s->minimizeDirection() == KDGanttMinimizeSplitter::Down) {
+ int mid = width()/2 + voffset[i];
+ arr.setPoints( 3,
+ mid - sw + 4, sw-4,
+ mid, 0,
+ mid + sw - 4, sw-4 );
+ }
+ else if ( !_collapsed && s->minimizeDirection() == KDGanttMinimizeSplitter::Down ||
+ _collapsed && s->minimizeDirection() == KDGanttMinimizeSplitter::Up ) {
+ int mid = width()/2 + voffset[i];
+ arr.setPoints( 3,
+ mid - sw + 4, 1-yyy,
+ mid, sw-3-yyy,
+ mid + sw -4, 1-yyy);
+ }
+ list.append( arr );
+ }
+ return list;
+}
+
+void KDGanttSplitterHandle::paintEvent( QPaintEvent * )
+{
+ QPixmap buffer( size() );
+ QPainter p( &buffer );
+
+ //LR
+ // Draw the splitter rectangle
+ p.setBrush( colorGroup().background() );
+ p.setPen( colorGroup().foreground() );
+ //p.drawRect( rect() );
+ buffer.fill( colorGroup().background() );
+ //buffer.fill( backgroundColor() );
+ // parentWidget()->style().drawPrimitive( QStyle::PE_Panel, &p, rect(), parentWidget()->colorGroup());
+
+ int sw = 8; // Hardcoded, given I didn't use styles anymore, I didn't like to use their size
+
+ // arrow color
+ QColor col;
+ if ( _activeButton )
+ col = colorGroup().background().dark( 250 );
+ else
+ col = colorGroup().background().dark( 150 );
+ //QColor col = backgroundColor().dark( 130 );
+ p.setBrush( col );
+ p.setPen( col );
+
+ QValueList<QPointArray> list = buttonRegions();
+ int index = 1;
+ if ( mUseOffset )
+ p.translate( 0, 1 );
+ for ( QValueList<QPointArray>::Iterator it = list.begin(); it != list.end(); ++it ) {
+ if ( index == _activeButton ) {
+
+ /*
+ if ( ! _collapsed ) {
+ p.save();
+ // p.translate( parentWidget()->style().pixelMetric( QStyle::PM_ButtonShiftHorizontal ),
+ // parentWidget()->style().pixelMetric( QStyle::PM_ButtonShiftVertical ) );
+ p.translate( -1, 0 );
+ p.drawPolygon( *it, true );
+ p.restore(); } else
+ */
+ p.drawPolygon( *it, true );
+
+ }
+ else {
+ /*
+ if ( ! _collapsed ) {
+ p.save();
+ p.translate( -1, 0 );
+ p.drawPolygon( *it, true );
+ p.restore();
+ } else
+ */
+ p.drawPolygon( *it, true );
+
+ }
+ index++;
+ }
+
+ // Draw the lines between the arrows
+ if ( s->minimizeDirection() == KDGanttMinimizeSplitter::Left ||
+ s->minimizeDirection() == KDGanttMinimizeSplitter::Right ) {
+ int mid = height()/2;
+ p.drawLine ( 1, mid - sw, 1, mid + sw );
+ p.drawLine ( 3, mid - sw, 3, mid + sw );
+ }
+ else if ( s->minimizeDirection() == KDGanttMinimizeSplitter::Up ||
+ s->minimizeDirection() == KDGanttMinimizeSplitter::Down ) {
+ int mid = width()/2;
+ p.drawLine( mid -sw, 1, mid +sw, 1 );
+ p.drawLine( mid -sw, 3, mid +sw, 3 );
+ }
+ bitBlt( this, 0, 0, &buffer );
+
+}
+#endif
+
+class QSplitterLayoutStruct
+{
+public:
+ KDGanttMinimizeSplitter::ResizeMode mode;
+ QCOORD sizer;
+ bool isSplitter;
+ QWidget *wid;
+};
+
+class QSplitterData
+{
+public:
+ QSplitterData() : opaque( FALSE ), firstShow( TRUE ) {}
+
+ QPtrList<QSplitterLayoutStruct> list;
+ bool opaque;
+ bool firstShow;
+};
+
+void kdganttGeomCalc( QMemArray<QLayoutStruct> &chain, int start, int count, int pos,
+ int space, int spacer );
+#endif // DOXYGEN_SKIP_INTERNAL
+
+
+/*!
+ \class KDGanttMinimizeSplitter KDGanttMinimizeSplitter.h
+ \brief The KDGanttMinimizeSplitter class implements a splitter
+ widget with minimize buttons.
+
+ This class (and its documentation) is largely a copy of Qt's
+ QSplitter; the copying was necessary because QSplitter is not
+ extensible at all. QSplitter and its documentation are licensed
+ according to the GPL and the Qt Professional License (if you hold
+ such a license) and are (C) Trolltech AS.
+
+ A splitter lets the user control the size of child widgets by
+ dragging the boundary between the children. Any number of widgets
+ may be controlled.
+
+ To show a QListBox, a QListView and a QTextEdit side by side:
+
+ \code
+ KDGanttMinimizeSplitter *split = new KDGanttMinimizeSplitter( parent );
+ QListBox *lb = new QListBox( split );
+ QListView *lv = new QListView( split );
+ QTextEdit *ed = new QTextEdit( split );
+ \endcode
+
+ In KDGanttMinimizeSplitter, the boundary can be either horizontal or
+ vertical. The default is horizontal (the children are side by side)
+ but you can use setOrientation( QSplitter::Vertical ) to set it to
+ vertical.
+
+ Use setResizeMode() to specify
+ that a widget should keep its size when the splitter is resized.
+
+ Although KDGanttMinimizeSplitter normally resizes the children only
+ at the end of a resize operation, if you call setOpaqueResize( TRUE
+ ) the widgets are resized as often as possible.
+
+ The initial distribution of size between the widgets is determined
+ by the initial size of each widget. You can also use setSizes() to
+ set the sizes of all the widgets. The function sizes() returns the
+ sizes set by the user.
+
+ If you hide() a child, its space will be distributed among the other
+ children. It will be reinstated when you show() it again. It is also
+ possible to reorder the widgets within the splitter using
+ moveToFirst() and moveToLast().
+*/
+
+
+
+static QSize minSize( const QWidget* /*w*/ )
+{
+ return QSize(0,0);
+}
+
+// This is the original version of minSize
+static QSize minSizeHint( const QWidget* w )
+{
+ QSize min = w->minimumSize();
+ QSize s;
+ if ( min.height() <= 0 || min.width() <= 0 )
+ s = w->minimumSizeHint();
+ if ( min.height() > 0 )
+ s.setHeight( min.height() );
+ if ( min.width() > 0 )
+ s.setWidth( min.width() );
+ return s.expandedTo(QSize(0,0));
+}
+
+
+
+/*!
+ Constructs a horizontal splitter with the \a parent and \a
+ name arguments being passed on to the QFrame constructor.
+*/
+KDGanttMinimizeSplitter::KDGanttMinimizeSplitter( QWidget *parent, const char *name )
+ :QFrame(parent,name,WPaintUnclipped)
+{
+ mFirstHandle = 0;
+#if QT_VERSION >= 232
+ orient = Horizontal;
+ init();
+#endif
+}
+
+/*!
+ Constructs a splitter with orientation \a o with the \a parent
+ and \a name arguments being passed on to the QFrame constructor.
+*/
+KDGanttMinimizeSplitter::KDGanttMinimizeSplitter( Orientation o, QWidget *parent, const char *name )
+ :QFrame(parent,name,WPaintUnclipped)
+{
+ mFirstHandle = 0;
+#if QT_VERSION >= 232
+ orient = o;
+ init();
+#endif
+}
+
+/*!
+ Destroys the splitter and any children.
+*/
+KDGanttMinimizeSplitter::~KDGanttMinimizeSplitter()
+{
+#if QT_VERSION >= 232
+ data->list.setAutoDelete( TRUE );
+ delete data;
+#endif
+}
+
+
+#if QT_VERSION >= 232
+void KDGanttMinimizeSplitter::init()
+{
+ data = new QSplitterData;
+ if ( orient == Horizontal )
+ setSizePolicy( QSizePolicy(QSizePolicy::Expanding,QSizePolicy::Minimum) );
+ else
+ setSizePolicy( QSizePolicy(QSizePolicy::Minimum,QSizePolicy::Expanding) );
+}
+#endif
+
+
+
+/*!
+ \brief the orientation of the splitter
+
+ By default the orientation is horizontal (the widgets are side by side).
+ The possible orientations are Qt:Vertical and Qt::Horizontal (the default).
+*/
+void KDGanttMinimizeSplitter::setOrientation( Orientation o )
+{
+#if QT_VERSION >= 232
+ if ( orient == o )
+ return;
+ orient = o;
+
+ if ( orient == Horizontal )
+ setSizePolicy( QSizePolicy( QSizePolicy::Expanding, QSizePolicy::Minimum ) );
+ else
+ setSizePolicy( QSizePolicy( QSizePolicy::Minimum, QSizePolicy::Expanding ) );
+
+ QSplitterLayoutStruct *s = data->list.first();
+ while ( s ) {
+ if ( s->isSplitter )
+ ((KDGanttSplitterHandle*)s->wid)->setOrientation( o );
+ s = data->list.next(); // ### next at end of loop, no iterator
+ }
+ recalc( isVisible() );
+#endif
+}
+
+
+#if QT_VERSION >= 232
+/*!
+ \reimp
+*/
+void KDGanttMinimizeSplitter::resizeEvent( QResizeEvent * )
+{
+ doResize();
+}
+
+
+/*
+ Inserts the widget \a w at the end (or at the beginning if \a first
+ is TRUE) of the splitter's list of widgets.
+
+ It is the responsibility of the caller of this function to make sure
+ that \a w is not already in the splitter and to call recalcId if
+ needed. (If \a first is TRUE, then recalcId is very probably
+ needed.)
+*/
+QSplitterLayoutStruct *KDGanttMinimizeSplitter::addWidget( QWidget *w, bool first )
+{
+ QSplitterLayoutStruct *s;
+ KDGanttSplitterHandle *newHandle = 0;
+ if ( data->list.count() > 0 ) {
+ s = new QSplitterLayoutStruct;
+ s->mode = KeepSize;
+ QString tmp = "qt_splithandle_";
+ tmp += w->name();
+ newHandle = new KDGanttSplitterHandle( orientation(), this, tmp.latin1() );
+ if ( ! mFirstHandle )
+ mFirstHandle = newHandle;
+ s->wid = newHandle;
+ newHandle->setId(data->list.count());
+ s->isSplitter = TRUE;
+ s->sizer = pick( newHandle->sizeHint() );
+ if ( first )
+ data->list.insert( 0, s );
+ else
+ data->list.append( s );
+ }
+ s = new QSplitterLayoutStruct;
+ s->mode = Stretch;
+ s->wid = w;
+ if ( !testWState( WState_Resized ) && w->sizeHint().isValid() )
+ s->sizer = pick( w->sizeHint() );
+ else
+ s->sizer = pick( w->size() );
+ s->isSplitter = FALSE;
+ if ( first )
+ data->list.insert( 0, s );
+ else
+ data->list.append( s );
+ if ( newHandle && isVisible() )
+ newHandle->show(); //will trigger sending of post events
+ return s;
+}
+
+
+/*!
+ Tells the splitter that a child widget has been inserted or removed.
+ The event is passed in \a c.
+*/
+void KDGanttMinimizeSplitter::childEvent( QChildEvent *c )
+{
+ if ( c->type() == QEvent::ChildInserted ) {
+ if ( !c->child()->isWidgetType() )
+ return;
+
+ if ( ((QWidget*)c->child())->testWFlags( WType_TopLevel ) )
+ return;
+
+ QSplitterLayoutStruct *s = data->list.first();
+ while ( s ) {
+ if ( s->wid == c->child() )
+ return;
+ s = data->list.next();
+ }
+ addWidget( (QWidget*)c->child() );
+ recalc( isVisible() );
+
+ } else if ( c->type() == QEvent::ChildRemoved ) {
+ QSplitterLayoutStruct *p = 0;
+ if ( data->list.count() > 1 )
+ p = data->list.at(1); //remove handle _after_ first widget.
+ QSplitterLayoutStruct *s = data->list.first();
+ while ( s ) {
+ if ( s->wid == c->child() ) {
+ data->list.removeRef( s );
+ delete s;
+ if ( p && p->isSplitter ) {
+ data->list.removeRef( p );
+ delete p->wid; //will call childEvent
+ delete p;
+ }
+ recalcId();
+ doResize();
+ return;
+ }
+ p = s;
+ s = data->list.next();
+ }
+ }
+}
+
+
+/*!
+ Shows a rubber band at position \a p. If \a p is negative, the
+ rubber band is removed.
+*/
+void KDGanttMinimizeSplitter::setRubberband( int p )
+{
+ QPainter paint( this );
+ paint.setPen( gray );
+ paint.setBrush( gray );
+ paint.setRasterOp( XorROP );
+ QRect r = contentsRect();
+ const int rBord = 3; //Themable????
+#if QT_VERSION >= 300
+ int sw = style().pixelMetric(QStyle::PM_SplitterWidth, this);
+#else
+ int sw = style().splitterWidth();
+#endif
+ if ( orient == Horizontal ) {
+ if ( opaqueOldPos >= 0 )
+ paint.drawRect( opaqueOldPos + sw/2 - rBord , r.y(),
+ 2*rBord, r.height() );
+ if ( p >= 0 )
+ paint.drawRect( p + sw/2 - rBord, r.y(), 2*rBord, r.height() );
+ } else {
+ if ( opaqueOldPos >= 0 )
+ paint.drawRect( r.x(), opaqueOldPos + sw/2 - rBord,
+ r.width(), 2*rBord );
+ if ( p >= 0 )
+ paint.drawRect( r.x(), p + sw/2 - rBord, r.width(), 2*rBord );
+ }
+ opaqueOldPos = p;
+}
+
+
+/*! \reimp */
+bool KDGanttMinimizeSplitter::event( QEvent *e )
+{
+ if ( e->type() == QEvent::LayoutHint || ( e->type() == QEvent::Show && data->firstShow ) ) {
+ recalc( isVisible() );
+ if ( e->type() == QEvent::Show )
+ data->firstShow = FALSE;
+ }
+ return QWidget::event( e );
+}
+
+
+/*!
+ \obsolete
+
+ Draws the splitter handle in the rectangle described by \a x, \a y,
+ \a w, \a h using painter \a p.
+ \sa QStyle::drawPrimitive()
+*/
+void KDGanttMinimizeSplitter::drawSplitter( QPainter *p,
+ QCOORD x, QCOORD y, QCOORD w, QCOORD h )
+{
+#if 0
+ // LR
+ style().drawPrimitive(QStyle::PE_Splitter, p, QRect(x, y, w, h), colorGroup(),
+ (orientation() == Qt::Horizontal ?
+ QStyle::Style_Horizontal : 0));
+#endif
+}
+
+
+/*!
+ Returns the id of the splitter to the right of or below the widget \a w,
+ or 0 if there is no such splitter
+ (i.e. it is either not in this KDGanttMinimizeSplitter or it is at the end).
+*/
+int KDGanttMinimizeSplitter::idAfter( QWidget* w ) const
+{
+ QSplitterLayoutStruct *s = data->list.first();
+ bool seen_w = FALSE;
+ while ( s ) {
+ if ( s->isSplitter && seen_w )
+ return data->list.at();
+ if ( !s->isSplitter && s->wid == w )
+ seen_w = TRUE;
+ s = data->list.next();
+ }
+ return 0;
+}
+
+
+/*!
+ Moves the left/top edge of the splitter handle with id \a id as
+ close as possible to position \a p, which is the distance from the
+ left (or top) edge of the widget.
+
+ For Arabic and Hebrew the layout is reversed, and using this
+ function to set the position of the splitter might lead to
+ unexpected results, since in Arabic and Hebrew the position of
+ splitter one is to the left of the position of splitter zero.
+
+ \sa idAfter()
+*/
+void KDGanttMinimizeSplitter::moveSplitter( QCOORD p, int id )
+{
+ p = adjustPos( p, id );
+ QSplitterLayoutStruct *s = data->list.at(id);
+ int oldP = orient == Horizontal ? s->wid->x() : s->wid->y();
+ bool upLeft;
+ if ( false && orient == Horizontal ) {
+ p += s->wid->width();
+ upLeft = p > oldP;
+ } else
+ upLeft = p < oldP;
+
+ moveAfter( p, id, upLeft );
+ moveBefore( p-1, id-1, upLeft );
+
+ storeSizes();
+}
+
+
+void KDGanttMinimizeSplitter::setG( QWidget *w, int p, int s, bool isSplitter )
+{
+ if ( orient == Horizontal ) {
+ if ( false && orient == Horizontal && !isSplitter )
+ p = contentsRect().width() - p - s;
+ w->setGeometry( p, contentsRect().y(), s, contentsRect().height() );
+ } else
+ w->setGeometry( contentsRect().x(), p, contentsRect().width(), s );
+}
+
+
+/*
+ Places the right/bottom edge of the widget at \a id at position \a pos.
+
+ \sa idAfter()
+*/
+void KDGanttMinimizeSplitter::moveBefore( int pos, int id, bool upLeft )
+{
+ if( id < 0 )
+ return;
+ QSplitterLayoutStruct *s = data->list.at(id);
+ if ( !s )
+ return;
+ QWidget *w = s->wid;
+ if ( w->isHidden() ) {
+ moveBefore( pos, id-1, upLeft );
+ } else if ( s->isSplitter ) {
+ int pos1, pos2;
+ int dd = s->sizer;
+ if( false && orient == Horizontal ) {
+ pos1 = pos;
+ pos2 = pos + dd;
+ } else {
+ pos2 = pos - dd;
+ pos1 = pos2 + 1;
+ }
+ if ( upLeft ) {
+ setG( w, pos1, dd, TRUE );
+ moveBefore( pos2, id-1, upLeft );
+ } else {
+ moveBefore( pos2, id-1, upLeft );
+ setG( w, pos1, dd, TRUE );
+ }
+ } else {
+ int dd, newLeft, nextPos;
+ if( false && orient == Horizontal ) {
+ dd = w->geometry().right() - pos;
+ dd = QMAX( pick(minSize(w)), QMIN(dd, pick(w->maximumSize())));
+ newLeft = pos+1;
+ nextPos = newLeft + dd;
+ } else {
+ dd = pos - pick( w->pos() ) + 1;
+ dd = QMAX( pick(minSize(w)), QMIN(dd, pick(w->maximumSize())));
+ newLeft = pos-dd+1;
+ nextPos = newLeft - 1;
+ }
+ setG( w, newLeft, dd, TRUE );
+ moveBefore( nextPos, id-1, upLeft );
+ }
+}
+
+
+/*
+ Places the left/top edge of the widget at \a id at position \a pos.
+
+ \sa idAfter()
+*/
+void KDGanttMinimizeSplitter::moveAfter( int pos, int id, bool upLeft )
+{
+ QSplitterLayoutStruct *s = id < int(data->list.count()) ?
+ data->list.at(id) : 0;
+ if ( !s )
+ return;
+ QWidget *w = s->wid;
+ if ( w->isHidden() ) {
+ moveAfter( pos, id+1, upLeft );
+ } else if ( pick( w->pos() ) == pos ) {
+ //No need to do anything if it's already there.
+ return;
+ } else if ( s->isSplitter ) {
+ int dd = s->sizer;
+ int pos1, pos2;
+ if( false && orient == Horizontal ) {
+ pos2 = pos - dd;
+ pos1 = pos2 + 1;
+ } else {
+ pos1 = pos;
+ pos2 = pos + dd;
+ }
+ if ( upLeft ) {
+ setG( w, pos1, dd, TRUE );
+ moveAfter( pos2, id+1, upLeft );
+ } else {
+ moveAfter( pos2, id+1, upLeft );
+ setG( w, pos1, dd, TRUE );
+ }
+ } else {
+ int left = pick( w->pos() );
+ int right, dd,/* newRight,*/ newLeft, nextPos;
+ if ( false && orient == Horizontal ) {
+ dd = pos - left + 1;
+ dd = QMAX( pick(minSize(w)), QMIN(dd, pick(w->maximumSize())));
+ newLeft = pos-dd+1;
+ nextPos = newLeft - 1;
+ } else {
+ right = pick( w->geometry().bottomRight() );
+ dd = right - pos + 1;
+ dd = QMAX( pick(minSize(w)), QMIN(dd, pick(w->maximumSize())));
+ /*newRight = pos+dd-1;*/
+ newLeft = pos;
+ nextPos = newLeft + dd;
+ }
+ setG( w, newLeft, dd, TRUE );
+ /*if( right != newRight )*/
+ moveAfter( nextPos, id+1, upLeft );
+ }
+}
+
+
+void KDGanttMinimizeSplitter::expandPos( int id, int* min, int* max )
+{
+ QSplitterLayoutStruct *s = data->list.at(id-1);
+ QWidget* w = s->wid;
+ *min = pick( w->mapToParent( QPoint(0,0) ) );
+
+ if ( (uint) id == data->list.count() ) {
+ pick( size() );
+ }
+ else {
+ QSplitterLayoutStruct *s = data->list.at(id+1);
+ QWidget* w = s->wid;
+ *max = pick( w->mapToParent( QPoint( w->width(), w->height() ) ) ) -8;
+ }
+}
+
+
+/*!
+ Returns the valid range of the splitter with id \a id in \a *min and \a *max.
+
+ \sa idAfter()
+*/
+
+void KDGanttMinimizeSplitter::getRange( int id, int *min, int *max )
+{
+ int minB = 0; //before
+ int maxB = 0;
+ int minA = 0;
+ int maxA = 0; //after
+ int n = data->list.count();
+ if ( id < 0 || id >= n )
+ return;
+ int i;
+ for ( i = 0; i < id; i++ ) {
+ QSplitterLayoutStruct *s = data->list.at(i);
+ if ( s->wid->isHidden() ) {
+ //ignore
+ } else if ( s->isSplitter ) {
+ minB += s->sizer;
+ maxB += s->sizer;
+ } else {
+ minB += pick( minSize(s->wid) );
+ maxB += pick( s->wid->maximumSize() );
+ }
+ }
+ for ( i = id; i < n; i++ ) {
+ QSplitterLayoutStruct *s = data->list.at(i);
+ if ( s->wid->isHidden() ) {
+ //ignore
+ } else if ( s->isSplitter ) {
+ minA += s->sizer;
+ maxA += s->sizer;
+ } else {
+ minA += pick( minSize(s->wid) );
+ maxA += pick( s->wid->maximumSize() );
+ }
+ }
+ QRect r = contentsRect();
+ if ( orient == Horizontal && false ) {
+#if QT_VERSION >= 300
+ int splitterWidth = style().pixelMetric(QStyle::PM_SplitterWidth, this);
+#else
+ int splitterWidth = style().splitterWidth();
+#endif
+
+ if ( min )
+ *min = pick(r.topRight()) - QMIN( maxB, pick(r.size())-minA ) - splitterWidth;
+ if ( max )
+ *max = pick(r.topRight()) - QMAX( minB, pick(r.size())-maxA ) - splitterWidth;
+ } else {
+ if ( min )
+ *min = pick(r.topLeft()) + QMAX( minB, pick(r.size())-maxA );
+ if ( max )
+ *max = pick(r.topLeft()) + QMIN( maxB, pick(r.size())-minA );
+ }
+}
+
+
+/*!
+ Returns the closest legal position to \a p of the splitter with id \a id.
+
+ \sa idAfter()
+*/
+
+int KDGanttMinimizeSplitter::adjustPos( int p, int id )
+{
+ int min = 0;
+ int max = 0;
+ getRange( id, &min, &max );
+ p = QMAX( min, QMIN( p, max ) );
+
+ return p;
+}
+
+
+void KDGanttMinimizeSplitter::doResize()
+{
+ QRect r = contentsRect();
+ int i;
+ int n = data->list.count();
+ QMemArray<QLayoutStruct> a( n );
+ for ( i = 0; i< n; i++ ) {
+ a[i].init();
+ QSplitterLayoutStruct *s = data->list.at(i);
+ if ( s->wid->isHidden() ) {
+ a[i].stretch = 0;
+ a[i].sizeHint = a[i].minimumSize = 0;
+ a[i].maximumSize = 0;
+ } else if ( s->isSplitter ) {
+ a[i].stretch = 0;
+ a[i].sizeHint = a[i].minimumSize = a[i].maximumSize = s->sizer;
+ a[i].empty = FALSE;
+ } else if ( s->mode == KeepSize ) {
+ a[i].stretch = 0;
+ a[i].minimumSize = pick( minSize(s->wid) );
+ a[i].sizeHint = s->sizer;
+ a[i].maximumSize = pick( s->wid->maximumSize() );
+ a[i].empty = FALSE;
+ } else if ( s->mode == FollowSizeHint ) {
+ a[i].stretch = 0;
+ a[i].minimumSize = a[i].sizeHint = pick( s->wid->sizeHint() );
+ a[i].maximumSize = pick( s->wid->maximumSize() );
+ a[i].empty = FALSE;
+ } else { //proportional
+ a[i].stretch = s->sizer;
+ a[i].maximumSize = pick( s->wid->maximumSize() );
+ a[i].sizeHint = a[i].minimumSize = pick( minSize(s->wid) );
+ a[i].empty = FALSE;
+ }
+ }
+
+ kdganttGeomCalc( a, 0, n, pick( r.topLeft() ), pick( r.size() ), 0 );
+
+ for ( i = 0; i< n; i++ ) {
+ QSplitterLayoutStruct *s = data->list.at(i);
+ setG( s->wid, a[i].pos, a[i].size );
+ }
+
+}
+
+
+void KDGanttMinimizeSplitter::recalc( bool update )
+{
+ int fi = 2*frameWidth();
+ int maxl = fi;
+ int minl = fi;
+ int maxt = QWIDGETSIZE_MAX;
+ int mint = fi;
+ int n = data->list.count();
+ bool first = TRUE;
+ /*
+ The splitter before a hidden widget is always hidden.
+ The splitter before the first visible widget is hidden.
+ The splitter before any other visible widget is visible.
+ */
+ for ( int i = 0; i< n; i++ ) {
+ QSplitterLayoutStruct *s = data->list.at(i);
+ if ( !s->isSplitter ) {
+ QSplitterLayoutStruct *p = (i > 0) ? p = data->list.at( i-1 ) : 0;
+ if ( p && p->isSplitter )
+ if ( first || s->wid->isHidden() )
+ p->wid->hide(); //may trigger new recalc
+ else
+ p->wid->show(); //may trigger new recalc
+ if ( !s->wid->isHidden() )
+ first = FALSE;
+ }
+ }
+
+ bool empty=TRUE;
+ for ( int j = 0; j< n; j++ ) {
+ QSplitterLayoutStruct *s = data->list.at(j);
+ if ( !s->wid->isHidden() ) {
+ empty = FALSE;
+ if ( s->isSplitter ) {
+ minl += s->sizer;
+ maxl += s->sizer;
+ } else {
+ QSize minS = minSize(s->wid);
+ minl += pick( minS );
+ maxl += pick( s->wid->maximumSize() );
+ mint = QMAX( mint, trans( minS ));
+ int tm = trans( s->wid->maximumSize() );
+ if ( tm > 0 )
+ maxt = QMIN( maxt, tm );
+ }
+ }
+ }
+ if ( empty ) {
+ if ( parentWidget() != 0 && parentWidget()->inherits("KDGanttMinimizeSplitter") ) {
+ // nested splitters; be nice
+ maxl = maxt = 0;
+ } else {
+ // KDGanttMinimizeSplitter with no children yet
+ maxl = QWIDGETSIZE_MAX;
+ }
+ } else {
+ maxl = QMIN( maxl, QWIDGETSIZE_MAX );
+ }
+ if ( maxt < mint )
+ maxt = mint;
+
+ if ( orient == Horizontal ) {
+ setMaximumSize( maxl, maxt );
+ setMinimumSize( minl, mint );
+ } else {
+ setMaximumSize( maxt, maxl );
+ setMinimumSize( mint, minl );
+ }
+ if ( update )
+ doResize();
+}
+
+/*!
+ Sets resize mode of \a w to \a mode.
+
+ \sa ResizeMode
+*/
+
+void KDGanttMinimizeSplitter::setResizeMode( QWidget *w, ResizeMode mode )
+{
+ processChildEvents();
+ QSplitterLayoutStruct *s = data->list.first();
+ while ( s ) {
+ if ( s->wid == w ) {
+ s->mode = mode;
+ return;
+ }
+ s = data->list.next();
+ }
+ s = addWidget( w, TRUE );
+ s->mode = mode;
+}
+
+
+/*!
+ Returns TRUE if opaque resize is on; otherwise returns FALSE.
+
+ \sa setOpaqueResize()
+*/
+
+bool KDGanttMinimizeSplitter::opaqueResize() const
+{
+ return data->opaque;
+}
+
+
+/*!
+ If \a on is TRUE then opaque resizing is turned on; otherwise
+ opaque resizing is turned off.
+ Opaque resizing is initially turned off.
+
+ \sa opaqueResize()
+*/
+
+void KDGanttMinimizeSplitter::setOpaqueResize( bool on )
+{
+ data->opaque = on;
+}
+
+
+/*!
+ Moves widget \a w to the leftmost/top position.
+*/
+
+void KDGanttMinimizeSplitter::moveToFirst( QWidget *w )
+{
+ processChildEvents();
+ bool found = FALSE;
+ QSplitterLayoutStruct *s = data->list.first();
+ while ( s ) {
+ if ( s->wid == w ) {
+ found = TRUE;
+ QSplitterLayoutStruct *p = data->list.prev();
+ if ( p ) { // not already at first place
+ data->list.take(); //take p
+ data->list.take(); // take s
+ data->list.insert( 0, p );
+ data->list.insert( 0, s );
+ }
+ break;
+ }
+ s = data->list.next();
+ }
+ if ( !found )
+ addWidget( w, TRUE );
+ recalcId();
+}
+
+
+/*!
+ Moves widget \a w to the rightmost/bottom position.
+*/
+
+void KDGanttMinimizeSplitter::moveToLast( QWidget *w )
+{
+ processChildEvents();
+ bool found = FALSE;
+ QSplitterLayoutStruct *s = data->list.first();
+ while ( s ) {
+ if ( s->wid == w ) {
+ found = TRUE;
+ data->list.take(); // take s
+ QSplitterLayoutStruct *p = data->list.current();
+ if ( p ) { // the splitter handle after s
+ data->list.take(); //take p
+ data->list.append( p );
+ }
+ data->list.append( s );
+ break;
+ }
+ s = data->list.next();
+ }
+ if ( !found )
+ addWidget( w);
+ recalcId();
+}
+
+
+void KDGanttMinimizeSplitter::recalcId()
+{
+ int n = data->list.count();
+ for ( int i = 0; i < n; i++ ) {
+ QSplitterLayoutStruct *s = data->list.at(i);
+ if ( s->isSplitter )
+ ((KDGanttSplitterHandle*)s->wid)->setId(i);
+ }
+}
+
+
+/*!\reimp
+*/
+QSize KDGanttMinimizeSplitter::sizeHint() const
+{
+ constPolish();
+ int l = 0;
+ int t = 0;
+ if ( children() ) {
+ const QObjectList * c = children();
+ QObjectListIt it( *c );
+ QObject * o;
+
+ while( (o=it.current()) != 0 ) {
+ ++it;
+ if ( o->isWidgetType() &&
+ !((QWidget*)o)->isHidden() ) {
+ QSize s = ((QWidget*)o)->sizeHint();
+ if ( s.isValid() ) {
+ l += pick( s );
+ t = QMAX( t, trans( s ) );
+ }
+ }
+ }
+ }
+ return orientation() == Horizontal ? QSize( l, t ) : QSize( t, l );
+}
+
+
+/*!
+\reimp
+*/
+
+QSize KDGanttMinimizeSplitter::minimumSizeHint() const
+{
+ constPolish();
+ int l = 0;
+ int t = 0;
+ if ( children() ) {
+ const QObjectList * c = children();
+ QObjectListIt it( *c );
+ QObject * o;
+
+ while( (o=it.current()) != 0 ) {
+ ++it;
+ if ( o->isWidgetType() &&
+ !((QWidget*)o)->isHidden() ) {
+ QSize s = minSizeHint((QWidget*)o);
+ if ( s.isValid() ) {
+ l += pick( s );
+ t = QMAX( t, trans( s ) );
+ }
+ }
+ }
+ }
+ return orientation() == Horizontal ? QSize( l, t ) : QSize( t, l );
+}
+
+
+/*
+ Calculates stretch parameters from current sizes
+*/
+
+void KDGanttMinimizeSplitter::storeSizes()
+{
+ QSplitterLayoutStruct *s = data->list.first();
+ while ( s ) {
+ if ( !s->isSplitter )
+ s->sizer = pick( s->wid->size() );
+ s = data->list.next();
+ }
+}
+
+
+#if 0 // ### remove this code ASAP
+
+/*!
+ Hides \a w if \a hide is TRUE and updates the splitter.
+
+ \warning Due to a limitation in the current implementation,
+ calling QWidget::hide() will not work.
+*/
+
+void KDGanttMinimizeSplitter::setHidden( QWidget *w, bool hide )
+{
+ if ( w == w1 ) {
+ w1show = !hide;
+ } else if ( w == w2 ) {
+ w2show = !hide;
+ } else {
+#ifdef QT_CHECK_RANGE
+ qWarning( "KDGanttMinimizeSplitter::setHidden(), unknown widget" );
+#endif
+ return;
+ }
+ if ( hide )
+ w->hide();
+ else
+ w->show();
+ recalc( TRUE );
+}
+
+
+/*!
+ Returns the hidden status of \a w
+*/
+
+bool KDGanttMinimizeSplitter::isHidden( QWidget *w ) const
+{
+ if ( w == w1 )
+ return !w1show;
+ else if ( w == w2 )
+ return !w2show;
+#ifdef QT_CHECK_RANGE
+ else
+ qWarning( "KDGanttMinimizeSplitter::isHidden(), unknown widget" );
+#endif
+ return FALSE;
+}
+#endif
+
+
+/*!
+ Returns a list of the size parameters of all the widgets in this
+ splitter.
+
+ Giving the values to another splitter's setSizes() function will
+ produce a splitter with the same layout as this one.
+
+ Note that if you want to iterate over the list, you should
+ iterate over a copy, e.g.
+ \code
+ QValueList<int> list = mySplitter.sizes();
+ QValueList<int>::Iterator it = list.begin();
+ while( it != list.end() ) {
+ myProcessing( *it );
+ ++it;
+ }
+ \endcode
+
+ \sa setSizes()
+*/
+
+QValueList<int> KDGanttMinimizeSplitter::sizes() const
+{
+ if ( !testWState(WState_Polished) ) {
+ QWidget* that = (QWidget*) this;
+ that->polish();
+ }
+ QValueList<int> list;
+ QSplitterLayoutStruct *s = data->list.first();
+ while ( s ) {
+ if ( !s->isSplitter )
+ list.append( s->sizer );
+ s = data->list.next();
+ }
+ return list;
+}
+
+
+
+/*!
+ Sets the size parameters to the values given in \a list.
+ If the splitter is horizontal, the values set the sizes from
+ left to right. If it is vertical, the sizes are applied from
+ top to bottom.
+ Extra values in \a list are ignored.
+
+ If \a list contains too few values, the result is undefined
+ but the program will still be well-behaved.
+
+ \sa sizes()
+*/
+
+void KDGanttMinimizeSplitter::setSizes( QValueList<int> list )
+{
+ processChildEvents();
+ QValueList<int>::Iterator it = list.begin();
+ QSplitterLayoutStruct *s = data->list.first();
+ while ( s && it != list.end() ) {
+ if ( !s->isSplitter ) {
+ s->sizer = *it;
+ ++it;
+ }
+ s = data->list.next();
+ }
+ doResize();
+}
+
+
+/*!
+ Gets all posted child events, ensuring that the internal state of
+ the splitter is consistent.
+*/
+
+void KDGanttMinimizeSplitter::processChildEvents()
+{
+ QApplication::sendPostedEvents( this, QEvent::ChildInserted );
+}
+
+
+/*!
+ \reimp
+*/
+
+void KDGanttMinimizeSplitter::styleChange( QStyle& old )
+{
+
+#if QT_VERSION >= 300
+ int sw = style().pixelMetric(QStyle::PM_SplitterWidth, this);
+#else
+ int sw = style().splitterWidth();
+#endif
+ QSplitterLayoutStruct *s = data->list.first();
+ while ( s ) {
+ if ( s->isSplitter )
+ s->sizer = sw;
+ s = data->list.next();
+ }
+ doResize();
+ QFrame::styleChange( old );
+}
+
+#endif
+
+/*!
+ Specifies the direction of the minimize buttons.
+ If the orientation of the splitter is horizontal then with
+ KDGanttMinimizeSplitter::Left or KDGanttMinimizeSplitter::Right should be used,
+ otherwise either KDGanttMinimizeSplitter::Up or KDGanttMinimizeSplitter::Down
+ should be used.
+*/
+void KDGanttMinimizeSplitter::setMinimizeDirection( Direction direction )
+{
+ _direction = direction;
+}
+
+/*!
+ Returns the direction of the minimize buttons.
+*/
+KDGanttMinimizeSplitter::Direction KDGanttMinimizeSplitter::minimizeDirection() const
+{
+ return _direction;
+}
+
+/*
+ This is a copy of qGeomCalc() in qlayoutengine.cpp which
+ unfortunately isn't exported.
+*/
+static inline int toFixed( int i ) { return i * 256; }
+static inline int fRound( int i ) {
+ return ( i % 256 < 128 ) ? i / 256 : 1 + i / 256;
+}
+void kdganttGeomCalc( QMemArray<QLayoutStruct> &chain, int start, int count, int pos,
+ int space, int spacer )
+{
+ typedef int fixed;
+ int cHint = 0;
+ int cMin = 0;
+ int cMax = 0;
+ int sumStretch = 0;
+ int spacerCount = 0;
+
+ bool wannaGrow = FALSE; // anyone who really wants to grow?
+ // bool canShrink = FALSE; // anyone who could be persuaded to shrink?
+
+ int i;
+ for ( i = start; i < start + count; i++ ) {
+ chain[i].done = FALSE;
+ cHint += chain[i].sizeHint;
+ cMin += chain[i].minimumSize;
+ cMax += chain[i].maximumSize;
+ sumStretch += chain[i].stretch;
+ if ( !chain[i].empty )
+ spacerCount++;
+ wannaGrow = wannaGrow || chain[i].expansive;
+ }
+
+ int extraspace = 0;
+ if ( spacerCount )
+ spacerCount--; // only spacers between things
+ if ( space < cMin + spacerCount * spacer ) {
+ // qDebug("not enough space");
+ for ( i = start; i < start+count; i++ ) {
+ chain[i].size = chain[i].minimumSize;
+ chain[i].done = TRUE;
+ }
+ } else if ( space < cHint + spacerCount*spacer ) {
+ // Less space than sizeHint, but more than minimum.
+ // Currently take space equally from each, like in Qt 2.x.
+ // Commented-out lines will give more space to stretchier items.
+ int n = count;
+ int space_left = space - spacerCount*spacer;
+ int overdraft = cHint - space_left;
+ //first give to the fixed ones:
+ for ( i = start; i < start+count; i++ ) {
+ if ( !chain[i].done && chain[i].minimumSize >= chain[i].sizeHint) {
+ chain[i].size = chain[i].sizeHint;
+ chain[i].done = TRUE;
+ space_left -= chain[i].sizeHint;
+ // sumStretch -= chain[i].stretch;
+ n--;
+ }
+ }
+ bool finished = n == 0;
+ while ( !finished ) {
+ finished = TRUE;
+ fixed fp_over = toFixed( overdraft );
+ fixed fp_w = 0;
+
+ for ( i = start; i < start+count; i++ ) {
+ if ( chain[i].done )
+ continue;
+ // if ( sumStretch <= 0 )
+ fp_w += fp_over / n;
+ // else
+ // fp_w += (fp_over * chain[i].stretch) / sumStretch;
+ int w = fRound( fp_w );
+ chain[i].size = chain[i].sizeHint - w;
+ fp_w -= toFixed( w ); //give the difference to the next
+ if ( chain[i].size < chain[i].minimumSize ) {
+ chain[i].done = TRUE;
+ chain[i].size = chain[i].minimumSize;
+ finished = FALSE;
+ overdraft -= chain[i].sizeHint - chain[i].minimumSize;
+ // sumStretch -= chain[i].stretch;
+ n--;
+ break;
+ }
+ }
+ }
+ } else { //extra space
+ int n = count;
+ int space_left = space - spacerCount*spacer;
+ // first give to the fixed ones, and handle non-expansiveness
+ for ( i = start; i < start + count; i++ ) {
+ if ( !chain[i].done && (chain[i].maximumSize <= chain[i].sizeHint
+ || wannaGrow && !chain[i].expansive) ) {
+ chain[i].size = chain[i].sizeHint;
+ chain[i].done = TRUE;
+ space_left -= chain[i].sizeHint;
+ sumStretch -= chain[i].stretch;
+ n--;
+ }
+ }
+ extraspace = space_left;
+ /*
+ Do a trial distribution and calculate how much it is off.
+ If there are more deficit pixels than surplus pixels, give
+ the minimum size items what they need, and repeat.
+ Otherwise give to the maximum size items, and repeat.
+
+ I have a wonderful mathematical proof for the correctness
+ of this principle, but unfortunately this comment is too
+ small to contain it.
+ */
+ int surplus, deficit;
+ do {
+ surplus = deficit = 0;
+ fixed fp_space = toFixed( space_left );
+ fixed fp_w = 0;
+ for ( i = start; i < start+count; i++ ) {
+ if ( chain[i].done )
+ continue;
+ extraspace = 0;
+ if ( sumStretch <= 0 )
+ fp_w += fp_space / n;
+ else
+ fp_w += (fp_space * chain[i].stretch) / sumStretch;
+ int w = fRound( fp_w );
+ chain[i].size = w;
+ fp_w -= toFixed( w ); // give the difference to the next
+ if ( w < chain[i].sizeHint ) {
+ deficit += chain[i].sizeHint - w;
+ } else if ( w > chain[i].maximumSize ) {
+ surplus += w - chain[i].maximumSize;
+ }
+ }
+ if ( deficit > 0 && surplus <= deficit ) {
+ // give to the ones that have too little
+ for ( i = start; i < start+count; i++ ) {
+ if ( !chain[i].done &&
+ chain[i].size < chain[i].sizeHint ) {
+ chain[i].size = chain[i].sizeHint;
+ chain[i].done = TRUE;
+ space_left -= chain[i].sizeHint;
+ sumStretch -= chain[i].stretch;
+ n--;
+ }
+ }
+ }
+ if ( surplus > 0 && surplus >= deficit ) {
+ // take from the ones that have too much
+ for ( i = start; i < start+count; i++ ) {
+ if ( !chain[i].done &&
+ chain[i].size > chain[i].maximumSize ) {
+ chain[i].size = chain[i].maximumSize;
+ chain[i].done = TRUE;
+ space_left -= chain[i].maximumSize;
+ sumStretch -= chain[i].stretch;
+ n--;
+ }
+ }
+ }
+ } while ( n > 0 && surplus != deficit );
+ if ( n == 0 )
+ extraspace = space_left;
+ }
+
+ // as a last resort, we distribute the unwanted space equally
+ // among the spacers (counting the start and end of the chain).
+
+ //### should do a sub-pixel allocation of extra space
+ int extra = extraspace / ( spacerCount + 2 );
+ int p = pos + extra;
+ for ( i = start; i < start+count; i++ ) {
+ chain[i].pos = p;
+ p = p + chain[i].size;
+ if ( !chain[i].empty )
+ p += spacer+extra;
+ }
+}
+
+#endif
+
+/*!
+ \enum KDGanttMinimizeSplitter::Direction
+
+ The values of this enumeration describe into which direction the
+ splitter will collapse its child widgets. By extension, it also
+ specifies the orientation of the splitter; collapsing to the left or
+ to the right results in a horizontal splitter, collapsing to the top
+ or bottom in a vertical splitter.
+*/
+
+/*!
+ \fn Orientation KDGanttMinimizeSplitter::orientation() const
+
+ Returns the orientation of the splitter.
+*/
+
+/*! \enum KDGanttMinimizeSplitter::ResizeMode
+
+ This enum type describes how KDGanttMinimizeSplitter will resize each of its child widgets. The currently defined values are:
+
+ Stretch: the widget will be resized when the splitter
+ itself is resized.
+
+ KeepSize: KDGanttMinimizeSplitter will try to keep this widget's size
+ unchanged.
+
+ FollowSizeHint: KDGanttMinimizeSplitter will resize the widget when the
+ widget's size hint changes.
+*/
+