| -rw-r--r-- | libqtaux/qsplitter.cpp | 4 |
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diff --git a/libqtaux/qsplitter.cpp b/libqtaux/qsplitter.cpp index ab6e01b..39321f8 100644 --- a/libqtaux/qsplitter.cpp +++ b/libqtaux/qsplitter.cpp @@ -1,812 +1,808 @@ /**************************************************************************** ** $Id$ ** ** Splitter widget ** ** Created: 980105 ** ** Copyright (C) 1992-2000 Trolltech AS. All rights reserved. ** ** This file is part of the widgets module of the Qt GUI Toolkit. ** ** This file may be distributed under the terms of the Q Public License ** as defined by Trolltech AS of Norway and appearing in the file ** LICENSE.QPL included in the packaging of this file. ** ** 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 Qt Enterprise Edition or Qt Professional Edition ** licenses may use this file in accordance with the Qt 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.trolltech.com/pricing.html or email sales@trolltech.com for ** information about Qt Commercial License Agreements. ** See http://www.trolltech.com/qpl/ for QPL licensing information. ** See http://www.trolltech.com/gpl/ for GPL licensing information. ** ** Contact info@trolltech.com if any conditions of this licensing are ** not clear to you. ** **********************************************************************/ #include "qsplitter.h" -#include "qpainter.h" #include "qdrawutil.h" -#include "qbitmap.h" #include "qlayoutengine_p.h" -#include "qlist.h" -#include "qarray.h" #include "qobjectlist.h" #include "qapplication.h" //sendPostedEvents class QSplitterHandle : public QWidget { public: QSplitterHandle( Qt::Orientation o, QSplitter *parent, const char* name=0 ); void setOrientation( Qt::Orientation o ); Qt::Orientation orientation() const { return orient; } bool opaque() const { return s->opaqueResize(); } QSize sizeHint() const; QSizePolicy sizePolicy() const; int id() const { return myId; } // data->list.at(id())->wid == this void setId( int i ) { myId = i; } protected: void paintEvent( QPaintEvent * ); void mouseMoveEvent( QMouseEvent * ); void mousePressEvent( QMouseEvent * ); void mouseReleaseEvent( QMouseEvent * ); private: Qt::Orientation orient; bool opaq; int myId; QSplitter *s; }; static int mouseOffset; static int opaqueOldPos = -1; //### there's only one mouse, but this is a bit risky QSplitterHandle::QSplitterHandle( Qt::Orientation o, QSplitter *parent, const char * name ) : QWidget( parent, name ) { s = parent; setOrientation(o); } QSizePolicy QSplitterHandle::sizePolicy() const { //### removeme 3.0 return QWidget::sizePolicy(); } QSize QSplitterHandle::sizeHint() const { int sw = style().splitterWidth(); return QSize(sw,sw).expandedTo( QApplication::globalStrut() ); } void QSplitterHandle::setOrientation( Qt::Orientation o ) { orient = o; #ifndef QT_NO_CURSOR if ( o == QSplitter::Horizontal ) setCursor( splitHCursor ); else setCursor( splitVCursor ); #endif } void QSplitterHandle::mouseMoveEvent( QMouseEvent *e ) { if ( !(e->state()&LeftButton) ) return; QCOORD pos = s->pick(parentWidget()->mapFromGlobal(e->globalPos())) - mouseOffset; if ( opaque() ) { s->moveSplitter( pos, id() ); } else { int min = pos; int max = pos; s->getRange( id(), &min, &max ); s->setRubberband( QMAX( min, QMIN(max, pos ))); } } void QSplitterHandle::mousePressEvent( QMouseEvent *e ) { if ( e->button() == LeftButton ) mouseOffset = s->pick(e->pos()); } void QSplitterHandle::mouseReleaseEvent( QMouseEvent *e ) { if ( !opaque() && e->button() == LeftButton ) { QCOORD pos = s->pick(parentWidget()->mapFromGlobal(e->globalPos())); s->setRubberband( -1 ); s->moveSplitter( pos, id() ); } } void QSplitterHandle::paintEvent( QPaintEvent * ) { QPainter p( this ); s->drawSplitter( &p, 0, 0, width(), height() ); } class QSplitterLayoutStruct { public: QSplitter::ResizeMode mode; QCOORD sizer; bool isSplitter; QWidget *wid; }; class QSplitterData { public: QSplitterData() : opaque( FALSE ), firstShow( TRUE ) {} QList<QSplitterLayoutStruct> list; bool opaque; bool firstShow; }; // NOT REVISED /*! \class QSplitter qsplitter.h \brief The QSplitter class implements a splitter widget. \ingroup organizers 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 QMultiLineEdit side by side: \code QSplitter *split = new QSplitter( parent ); QListBox *lb = new QListBox( split ); QListView *lv = new QListView( split ); QMultiLineEdit *ed = new QMultiLineEdit( split ); \endcode In QSplitter the boundary can be either horizontal or vertical. The default is horizontal (the children are side by side) and you can use setOrientation( QSplitter::Vertical ) to set it to vertical. By default, all widgets can be as large or as small as the user wishes, down to \link QWidget::minimumSizeHint() minimumSizeHint()\endlink. You can naturally use setMinimumSize() and/or setMaximumSize() on the children. Use setResizeMode() to specify that a widget should keep its size when the splitter is resized. QSplitter normally resizes the children only at the end of a resize operation, but 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. When you show() it again, it will be reinstated. <img src=qsplitter-m.png> <img src=qsplitter-w.png> \sa QTabBar */ static QSize minSize( 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. */ QSplitter::QSplitter( QWidget *parent, const char *name ) :QFrame(parent,name,WPaintUnclipped) { orient = Horizontal; init(); } /*! Constructs splitter with orientation \a o. */ QSplitter::QSplitter( Orientation o, QWidget *parent, const char *name ) :QFrame(parent,name,WPaintUnclipped) { orient = o; init(); } /*! Destructs the splitter. */ QSplitter::~QSplitter() { data->list.setAutoDelete( TRUE ); delete data; } void QSplitter::init() { data = new QSplitterData; if ( orient == Horizontal ) setSizePolicy( QSizePolicy(QSizePolicy::Fixed,QSizePolicy::Minimum) ); else setSizePolicy( QSizePolicy(QSizePolicy::Minimum,QSizePolicy::Fixed) ); } /*! \fn void QSplitter::refresh() Updates the splitter state. You should not need to call this function during normal use of the splitter. */ /*! Sets the orientation to \a o. By default the orientation is horizontal (the widgets are side by side). \sa orientation() */ void QSplitter::setOrientation( Orientation o ) { if ( orient == o ) return; orient = o; if ( orient == Horizontal ) setSizePolicy( QSizePolicy( QSizePolicy::Fixed, QSizePolicy::Minimum ) ); else setSizePolicy( QSizePolicy( QSizePolicy::Minimum, QSizePolicy::Fixed ) ); QSplitterLayoutStruct *s = data->list.first(); while ( s ) { if ( s->isSplitter ) ((QSplitterHandle*)s->wid)->setOrientation( o ); s = data->list.next(); // ### next at end of loop, no iterator } recalc( isVisible() ); } /*! \fn Orientation QSplitter::orientation() const Returns the orientation (\c Horizontal or \c Vertical) of the splitter. \sa setOrientation() */ /*! \reimp */ void QSplitter::resizeEvent( QResizeEvent * ) { doResize(); } /*! Inserts the widget \a w at the end, or at the beginning if \a first is TRUE 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 *QSplitter::addWidget( QWidget *w, bool first ) { QSplitterLayoutStruct *s; QSplitterHandle *newHandle = 0; if ( data->list.count() > 0 ) { s = new QSplitterLayoutStruct; s->mode = KeepSize; newHandle = new QSplitterHandle( orientation(), this ); 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/removed. */ void QSplitter::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 QSplitter::setRubberband( int p ) { QPainter paint( this ); paint.setPen( gray ); paint.setBrush( gray ); paint.setRasterOp( XorROP ); QRect r = contentsRect(); const int rBord = 3; //Themable???? const int sw = style().splitterWidth(); 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 QSplitter::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 ); } /*! Draws the splitter handle in the rectangle described by \a x, \a y, \a w, \a h using painter \a p. \sa QStyle::drawSplitter */ void QSplitter::drawSplitter( QPainter *p, QCOORD x, QCOORD y, QCOORD w, QCOORD h ) { style().drawSplitter( p, x, y, w, h, colorGroup(), orient ); } /*! Returns the id of the splitter to the right of or below the widget \a w, or 0 if there is no such splitter. (ie. it is either not in this QSplitter, or it is at the end). */ int QSplitter::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 \a p which is the distance from the left (or top) edge of the widget. \sa idAfter() */ void QSplitter::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 = p < oldP; moveAfter( p, id, upLeft ); moveBefore( p-1, id-1, upLeft ); storeSizes(); } void QSplitter::setG( QWidget *w, int p, int s ) { if ( orient == Horizontal ) 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 QSplitter::moveBefore( int pos, int id, bool upLeft ) { 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 dd = s->sizer; if ( upLeft ) { setG( w, pos-dd+1, dd ); moveBefore( pos-dd, id-1, upLeft ); } else { moveBefore( pos-dd, id-1, upLeft ); setG( w, pos-dd+1, dd ); } } else { int left = pick( w->pos() ); int dd = pos - left + 1; dd = QMAX( pick(minSize(w)), QMIN(dd, pick(w->maximumSize()))); int newLeft = pos-dd+1; setG( w, newLeft, dd ); if ( left != newLeft ) moveBefore( newLeft-1, id-1, upLeft ); } } /*! Places the left/top edge of the widget at \a id at position \a pos. \sa idAfter() */ void QSplitter::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; if ( upLeft ) { setG( w, pos, dd ); moveAfter( pos+dd, id+1, upLeft ); } else { moveAfter( pos+dd, id+1, upLeft ); setG( w, pos, dd ); } } else { int right = pick( w->geometry().bottomRight() ); int dd = right - pos + 1; dd = QMAX( pick(minSize(w)), QMIN(dd, pick(w->maximumSize()))); int newRight = pos+dd-1; setG( w, pos, dd ); moveAfter( newRight+1, id+1, upLeft ); } } /*! Returns the valid range of the splitter with id \a id in \a min and \a max. \sa idAfter() */ void QSplitter::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 ( 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 legal position closest to \a p of the splitter with id \a id. \sa idAfter() */ int QSplitter::adjustPos( int p, int id ) { int min = 0; int max = 0; getRange( id, &min, &max ); p = QMAX( min, QMIN( p, max ) ); return p; } void QSplitter::doResize() { QRect r = contentsRect(); int i; int n = data->list.count(); QArray<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; } } qGeomCalc( a, 0, n, pick( r.topLeft() ), pick( r.size() ), 0 ); for ( i = 0; i< n; i++ ) { QSplitterLayoutStruct *s = data->list.at(i); if ( orient == Horizontal ) s->wid->setGeometry( a[i].pos, r.top(), a[i].size, r.height() ); else s->wid->setGeometry( r.left(), a[i].pos, r.width(), a[i].size ); } } void QSplitter::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 ) maxl = maxt = 0; 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(); } /*! \enum QSplitter::ResizeMode This enum type describes how QSplitter will resize each of its child widgets. The currently defined values are: <ul> <li> \c Stretch - the widget will be resized when the splitter itself is resized. <li> \c KeepSize - QSplitter will try to keep this widget's size unchanged. <li> \c FollowSizeHint - QSplitter will resize the widget when its size hint changes. </ul> */ /*! Sets resize mode of \a w to \a mode. \sa ResizeMode */ void QSplitter::setResizeMode( QWidget *w, ResizeMode mode ) { processChildEvents(); QSplitterLayoutStruct *s = data->list.first(); while ( s ) { if ( s->wid == w ) { s->mode = mode; return; |