Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.

BUG:215923


git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdesdk@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 712 insertions, 0 deletions

diff --git a/kompare/komparepart/komparesplitter.cpp b/kompare/komparepart/komparesplitter.cpp
new file mode 100644
index 00000000..fcf014cb
--- /dev/null
+++ b/kompare/komparepart/komparesplitter.cpp
@@ -0,0 +1,712 @@
+/***************************************************************************
+                                komparesplitter.cpp  -  description
+                                -------------------
+        begin                   : Wed Jan 14 2004
+        copyright               : (C) 2004 by Jeff Snyder
+        email                   : jeff@caffeinated.me.uk
+****************************************************************************/
+
+/***************************************************************************
+**
+**   This program is free software; you can redistribute it and/or modify
+**   it under the terms of the GNU General Public License as published by
+**   the Free Software Foundation; either version 2 of the License, or
+**   (at your option) any later version.
+**
+***************************************************************************/
+
+#include "komparesplitter.h"
+
+#include <qstyle.h>
+#include <qstring.h>
+#include <qtimer.h>
+
+#include <kdebug.h>
+#include <kapplication.h>
+#include <kglobalsettings.h>
+
+#include "diffmodel.h"
+#include "difference.h"
+#include "viewsettings.h"
+#include "kompare_part.h"
+#include "komparelistview.h"
+#include "kompareconnectwidget.h"
+
+using namespace Diff2;
+
+KompareSplitter::KompareSplitter( ViewSettings *settings, QWidget * parent,
+                                  const char *name) :
+	QSplitter( Horizontal, parent, name ),
+	m_settings( settings )
+{
+	QFrame *scrollFrame = new QFrame( parent, "scrollFrame" );
+	reparent( scrollFrame, *(new QPoint()), false );
+
+	// Set up the scrollFrame
+	scrollFrame->setFrameStyle( QFrame::NoFrame | QFrame::Plain );
+	scrollFrame->setLineWidth(scrollFrame->style().pixelMetric(QStyle::PM_DefaultFrameWidth));
+	QGridLayout *pairlayout = new QGridLayout(scrollFrame, 2, 2, 0);
+	m_vScroll = new QScrollBar( QScrollBar::Vertical, scrollFrame );
+	pairlayout->addWidget( m_vScroll, 0, 1 );
+	m_hScroll = new QScrollBar( QScrollBar::Horizontal, scrollFrame );
+	pairlayout->addWidget( m_hScroll, 1, 0 );
+
+	new KompareListViewFrame(true, m_settings, this, "source");
+	new KompareListViewFrame(false, m_settings, this, "destination");
+	pairlayout->addWidget( this, 0, 0 );
+
+	// set up our looks
+	setFrameStyle( QFrame::StyledPanel | QFrame::Sunken );
+	setLineWidth( style().pixelMetric( QStyle::PM_DefaultFrameWidth ) );
+
+	setHandleWidth(50);
+	setChildrenCollapsible( false );
+	setFrameStyle( QFrame::NoFrame );
+	setSizePolicy( QSizePolicy (QSizePolicy::Ignored, QSizePolicy::Ignored ));
+	setOpaqueResize( true );
+	setFocusPolicy( QWidget::WheelFocus );
+
+	connect( this, SIGNAL(configChanged()), SLOT(slotConfigChanged()) );
+	connect( this, SIGNAL(configChanged()), SLOT(slotDelayedRepaintHandles()) );
+	connect( this, SIGNAL(configChanged()), SLOT(slotDelayedUpdateScrollBars()) );
+	
+	// scrolling
+	connect( m_vScroll, SIGNAL(valueChanged(int)), SLOT(scrollToId(int)) );
+	connect( m_vScroll, SIGNAL(sliderMoved(int)),  SLOT(scrollToId(int)) );
+	connect( m_hScroll, SIGNAL(valueChanged(int)), SIGNAL(setXOffset(int)) );
+	connect( m_hScroll, SIGNAL(sliderMoved(int)),  SIGNAL(setXOffset(int)) );
+
+	m_scrollTimer=new QTimer();
+	restartTimer = false;
+	connect (m_scrollTimer, SIGNAL(timeout()), SLOT(timerTimeout()) );
+
+	// we need to receive childEvents now so that d->list is ready for when
+	// slotSetSelection(...) arrives
+	kapp->sendPostedEvents(this, QEvent::ChildInserted);
+
+	// init stuff
+	slotUpdateScrollBars();
+}
+
+KompareSplitter::~KompareSplitter(){}
+
+/*
+    Inserts the widget \a w at the end (or at the beginning if \a
+    prepend is TRUE) of the splitter's list of widgets.
+
+    It is the responsibility of the caller to make sure that \a w is
+    not already in the splitter and to call recalcId() if needed. (If
+    \a prepend is TRUE, then recalcId() is very probably needed.)
+*/
+
+QSplitterLayoutStruct *KompareSplitter::addWidget( KompareListViewFrame *w, bool prepend )
+{
+	/* This function is *not* a good place to make connections to and from
+	 * the KompareListView. Make them in the KompareListViewFrame constructor
+	 * instad - that way the connections get made upon creation, not upon the
+	 * next processing of the event queue. */
+
+	QSplitterLayoutStruct *s;
+	KompareConnectWidgetFrame *newHandle = 0;
+	if ( d->list.count() > 0 ) {
+		s = new QSplitterLayoutStruct;
+		s->resizeMode = KeepSize;
+		QString tmp = "qt_splithandle_";
+		tmp += w->name();
+		KompareListView *lw = 
+			((KompareListViewFrame*)(prepend?w:d->list.last()->wid))->view();
+		KompareListView *rw = 
+			((KompareListViewFrame*)(prepend?d->list.first()->wid:w))->view();
+		newHandle = new KompareConnectWidgetFrame(lw, rw, m_settings, this, tmp.latin1());
+		s->wid = newHandle;
+		newHandle->setId( d->list.count() );
+		s->isHandle = TRUE;
+		s->sizer = pick( newHandle->sizeHint() );
+		if ( prepend )
+		    d->list.prepend( s );
+		else
+		    d->list.append( s );
+	}
+	s = new QSplitterLayoutStruct;
+	s->resizeMode = DefaultResizeMode;
+	s->wid = w;
+	s->isHandle = FALSE;
+	if ( prepend ) d->list.prepend( s );
+	else d->list.append( s );
+	if ( newHandle && isVisible() )
+		newHandle->show(); // will trigger sending of post events
+	return s;
+}
+
+
+/*!
+    Tells the splitter that the child widget described by \a c has
+    been inserted or removed.
+*/
+
+void KompareSplitter::childEvent( QChildEvent *c )
+{
+    if ( c->type() == QEvent::ChildInserted ) {
+		if ( !c->child()->isWidgetType() )
+			return;
+
+		if ( ((QWidget*)c->child())->testWFlags( WType_TopLevel ) )
+			return;
+
+		QSplitterLayoutStruct *s = d->list.first();
+		while ( s ) {
+			if ( s->wid == c->child() )
+				return;
+			s = d->list.next();
+		}
+		addWidget( (KompareListViewFrame*)c->child() );
+		recalc( isVisible() );
+    } else if ( c->type() == QEvent::ChildRemoved ) {
+		QSplitterLayoutStruct *prev = 0;
+		if ( d->list.count() > 1 )
+			prev = d->list.at( 1 );  // yes, this is correct
+		QSplitterLayoutStruct *curr = d->list.first();
+		while ( curr ) {
+			if ( curr->wid == c->child() ) {
+			d->list.removeRef( curr );
+			if ( prev && prev->isHandle ) {
+				QWidget *w = prev->wid;
+				d->list.removeRef( prev );
+				delete w; // will call childEvent()
+			}
+			recalcId();
+			doResize();
+			return;
+			}
+			prev = curr;
+			curr = d->list.next();
+		}
+	}
+}
+
+// This is from a private qt header (kernel/qlayoutengine_p.h). sorry.
+QSize qSmartMinSize( QWidget *w );
+
+static QPoint toggle( QWidget *w, QPoint pos )
+{
+    QSize minS = qSmartMinSize( w );
+    return -pos - QPoint( minS.width(), minS.height() );
+}
+
+static bool isCollapsed( QWidget *w )
+{
+    return w->x() < 0 || w->y() < 0;
+}
+
+static QPoint topLeft( QWidget *w )
+{
+    if ( isCollapsed(w) ) {
+        return toggle( w, w->pos() );
+    } else {
+        return w->pos();
+    }
+}
+
+static QPoint bottomRight( QWidget *w )
+{
+    if ( isCollapsed(w) ) {
+        return toggle( w, w->pos() ) - QPoint( 1, 1 );
+    } else {
+        return w->geometry().bottomRight();
+    }
+}
+
+void KompareSplitter::moveSplitter( QCOORD p, int id )
+{
+	QSplitterLayoutStruct *s = d->list.at( id );
+	int farMin;
+	int min;
+	int max;
+	int farMax;
+	p = adjustPos( p, id, &farMin, &min, &max, &farMax );
+	int oldP = pick( s->wid->pos() );
+	int* poss = new int[d->list.count()];
+	int* ws = new int[d->list.count()];
+	QWidget *w = 0;
+	bool upLeft;
+	if ( QApplication::reverseLayout() && orient == Horizontal ) {
+		int q = p + s->wid->width();
+		doMove( FALSE, q, id - 1, -1, (p > max), poss, ws );
+		doMove( TRUE, q, id, -1, (p < min), poss, ws );
+		upLeft = (q > oldP);
+	} else {
+		doMove( FALSE, p, id, +1, (p > max), poss, ws );
+		doMove( TRUE, p, id - 1, +1, (p < min), poss, ws );
+		upLeft = (p < oldP);
+	}
+	if ( upLeft ) {
+		int count = d->list.count();
+		for ( int id = 0; id < count; ++id ) {
+			w = d->list.at( id )->wid;
+			if( !w->isHidden() )
+				setGeo( w, poss[id], ws[id], TRUE );
+		}
+	} else {
+		for ( int id = d->list.count() - 1; id >= 0; --id ) {
+			w = d->list.at( id )->wid;
+			if( !w->isHidden() )
+				setGeo( w, poss[id], ws[id], TRUE );
+		}
+	}
+	storeSizes();
+}
+
+void KompareSplitter::doMove( bool backwards, int pos, int id, int delta,
+                        bool mayCollapse, int* positions, int* widths )
+{
+	QSplitterLayoutStruct *s;
+	QWidget *w;
+	for ( ; id >= 0 && id < (int)d->list.count();
+			id = backwards ? id - delta : id + delta ) {
+		s = d->list.at( id );
+		w = s->wid;
+		if ( w->isHidden() ) {
+			mayCollapse = TRUE;
+		} else {
+			if ( s->isHandle ) {
+				int dd = s->getSizer( orient );
+				int nextPos = backwards ? pos - dd : pos + dd;
+				positions[id] = pos;
+				widths[id] = dd;
+				pos = nextPos;
+			} else {
+				int dd = backwards ? pos - pick( topLeft(w) )
+				                   : pick( bottomRight(w) ) - pos + 1;
+				if ( dd > 0 || (!isCollapsed(w) && !mayCollapse) ) {
+					dd = QMAX( pick(qSmartMinSize(w)),
+					           QMIN(dd, pick(w->maximumSize())) );
+				} else {
+					dd = 0;
+				}
+				positions[id] = backwards ? pos - dd : pos;
+				widths[id] = dd;
+				pos = backwards ? pos - dd : pos + dd;
+				mayCollapse = TRUE;
+			}
+		}
+	}
+}
+
+void KompareSplitter::slotSetSelection( const DiffModel* model, const Difference* diff )
+{
+	QSplitterLayoutStruct *curr;
+	for ( curr = d->list.first(); curr; curr = d->list.next() )
+	{
+		if ( curr->isHandle )
+			((KompareConnectWidgetFrame*)
+				curr->wid)->wid()->slotSetSelection( model, diff );
+		else
+		{
+			((KompareListViewFrame*)
+				curr->wid)->view()->slotSetSelection( model, diff );
+			((KompareListViewFrame*)
+				curr->wid)->slotSetModel( model );
+		}
+	}
+	slotDelayedRepaintHandles();
+	slotDelayedUpdateScrollBars();
+}
+
+void KompareSplitter::slotSetSelection( const Difference* diff )
+{
+	QSplitterLayoutStruct *curr;
+	for ( curr = d->list.first(); curr; curr = d->list.next() )
+		if ( curr->isHandle )
+			((KompareConnectWidgetFrame*)
+				curr->wid)->wid()->slotSetSelection( diff );
+		else
+			((KompareListViewFrame*)
+				curr->wid)->view()->slotSetSelection( diff );
+	slotDelayedRepaintHandles();
+	slotDelayedUpdateScrollBars();
+}
+
+void KompareSplitter::slotApplyDifference( bool apply )
+{
+	QSplitterLayoutStruct *curr;
+	for ( curr = d->list.first(); curr; curr = d->list.next() )
+		if ( !curr->isHandle )
+			((KompareListViewFrame*)
+				curr->wid)->view()->slotApplyDifference( apply );
+	slotDelayedRepaintHandles();
+}
+
+void KompareSplitter::slotApplyAllDifferences( bool apply )
+{
+	QSplitterLayoutStruct *curr;
+	for ( curr = d->list.first(); curr; curr = d->list.next() )
+		if ( !curr->isHandle )
+			((KompareListViewFrame*)
+				curr->wid)->view()->slotApplyAllDifferences( apply );
+	slotDelayedRepaintHandles();
+	scrollToId( scrollTo ); // FIXME!
+}
+
+void KompareSplitter::slotApplyDifference( const Difference* diff, bool apply )
+{
+	QSplitterLayoutStruct *curr;
+	for ( curr = d->list.first(); curr; curr = d->list.next() )
+		if ( !curr->isHandle )
+			((KompareListViewFrame*)
+				curr->wid)->view()->slotApplyDifference( diff, apply );
+	slotDelayedRepaintHandles();
+}
+
+void KompareSplitter::slotDifferenceClicked( const Difference* diff )
+{
+	QSplitterLayoutStruct *curr;
+	for ( curr = d->list.first(); curr; curr = d->list.next() )
+		if ( !curr->isHandle )
+			((KompareListViewFrame*)
+				curr->wid)->view()->setSelectedDifference( diff, false );
+	emit selectionChanged( diff );
+}
+
+void KompareSplitter::slotConfigChanged()
+{
+	QSplitterLayoutStruct *curr;
+	for ( curr = d->list.first(); curr; curr = d->list.next() ) {
+		if ( !curr->isHandle )
+		{
+			((KompareListViewFrame*)
+				curr->wid)->view()->setSpaces( m_settings->m_tabToNumberOfSpaces );
+			((KompareListViewFrame*)
+				curr->wid)->view()->setFont( m_settings->m_font );
+			((KompareListViewFrame*)
+				curr->wid)->view()->update();
+		}
+	}
+}
+
+void KompareSplitter::slotDelayedRepaintHandles()
+{
+	QSplitterLayoutStruct *curr;
+	for ( curr = d->list.first(); curr; curr = d->list.next() )
+		 if ( curr->isHandle )
+			((KompareConnectWidgetFrame*)curr->wid)->wid()->slotDelayedRepaint();
+}
+
+void KompareSplitter::repaintHandles()
+{
+	QSplitterLayoutStruct *curr;
+	for ( curr = d->list.first(); curr; curr = d->list.next() )
+		if ( curr->isHandle )
+			((KompareConnectWidgetFrame*)curr->wid)->wid()->repaint();
+}
+
+// Scrolling stuff
+/*
+ * limit updating to once every 50 msec with a qtimer
+ * FIXME: i'm a nasty hack
+ */
+
+void KompareSplitter::wheelEvent( QWheelEvent* e )
+{
+	// scroll lines...
+	if ( e->orientation() == Qt::Vertical )
+	{
+		if ( e->state() & Qt::ControlButton )
+			if ( e->delta() < 0 ) // scroll down one page
+				m_vScroll->addPage();
+			else // scroll up one page
+				m_vScroll->subtractPage();
+		else
+			if ( e->delta() < 0 ) // scroll down
+				m_vScroll->addLine();
+			else // scroll up
+				m_vScroll->subtractLine();
+	}
+	else
+	{
+		if ( e->state() & Qt::ControlButton )
+			if ( e->delta() < 0 ) // scroll right one page
+				m_hScroll->addPage();
+			else // scroll left one page
+				m_hScroll->subtractPage();
+		else
+			if ( e->delta() < 0 ) // scroll to the right
+				m_hScroll->addLine();
+			else // scroll to the left
+				m_hScroll->subtractLine();
+	}
+	e->accept();
+	repaintHandles();
+}
+
+void KompareSplitter::keyPressEvent( QKeyEvent* e )
+{
+	//keyboard scrolling
+	switch ( e->key() ) {
+	case Key_Right:
+	case Key_L:
+		m_hScroll->addLine();
+		break;
+	case Key_Left:
+	case Key_H:
+		m_hScroll->subtractLine();
+		break;
+	case Key_Up:
+	case Key_K:
+		m_vScroll->subtractLine();
+		break;
+	case Key_Down:
+	case Key_J:
+		m_vScroll->addLine();
+		break;
+	case Key_PageDown:
+		m_vScroll->addPage();
+		break;
+	case Key_PageUp:
+		m_vScroll->subtractPage();
+		break;
+	}
+	e->accept();
+	repaintHandles();
+}
+
+void KompareSplitter::timerTimeout()
+{
+	if ( restartTimer )
+		restartTimer = false;
+	else
+		m_scrollTimer->stop();
+
+	slotDelayedRepaintHandles();	
+
+	emit scrollViewsToId( scrollTo );
+}
+
+void KompareSplitter::scrollToId( int id )
+{
+	scrollTo = id;
+
+	if( restartTimer )
+		return;
+
+	if( m_scrollTimer->isActive() )
+	{
+		restartTimer = true;
+	}
+	else
+	{
+		emit scrollViewsToId( id );
+		slotDelayedRepaintHandles();
+		m_scrollTimer->start(30, false);
+	}
+}
+
+void KompareSplitter::slotDelayedUpdateScrollBars()
+{
+	QTimer::singleShot( 0, this, SLOT( slotUpdateScrollBars() ) );
+}
+
+void KompareSplitter::slotUpdateScrollBars()
+{
+	int m_scrollDistance = m_settings->m_scrollNoOfLines * lineSpacing();
+	int m_pageSize = pageSize();
+
+	if( needVScrollBar() )
+	{
+		m_vScroll->show();
+
+		m_vScroll->blockSignals( true );
+		m_vScroll->setRange( minVScrollId(), 
+		                     maxVScrollId() );
+		m_vScroll->setValue( scrollId() );
+		m_vScroll->setSteps( m_scrollDistance, m_pageSize );
+		m_vScroll->blockSignals( false );
+	}
+	else
+	{
+		m_vScroll->hide();
+	}
+
+	if( needHScrollBar() )
+	{
+		m_hScroll->show();
+		m_hScroll->blockSignals( true );
+		m_hScroll->setRange( 0, maxHScrollId() );
+		m_hScroll->setValue( maxContentsX() );
+		m_hScroll->setSteps( 10, minVisibleWidth() - 10 );
+		m_hScroll->blockSignals( false );
+	}
+	else
+	{
+		m_hScroll->hide();
+	}
+}
+
+void KompareSplitter::slotDelayedUpdateVScrollValue()
+{
+	QTimer::singleShot( 0, this, SLOT( slotUpdateVScrollValue() ) );
+}
+
+void KompareSplitter::slotUpdateVScrollValue()
+{
+	m_vScroll->setValue( scrollId() );
+}
+
+/* FIXME: this should return the scrollId() from the listview containing the
+ * /base/ of the diff. but there's bigger issues with that atm.
+ */
+ 
+int KompareSplitter::scrollId()
+{
+	QSplitterLayoutStruct *curr = d->list.first();
+	for ( curr = d->list.first(); curr; curr = d->list.next() )
+		if ( !curr->isHandle )
+			return ((KompareListViewFrame*) curr->wid)->view()->scrollId();
+	return minVScrollId();
+}
+
+int KompareSplitter::lineSpacing()
+{
+	QSplitterLayoutStruct *curr = d->list.first();
+	for ( curr = d->list.first(); curr; curr = d->list.next() )
+		if ( !curr->isHandle )
+			return ((KompareListViewFrame*)
+				curr->wid)->view()->fontMetrics().lineSpacing();
+	return 1;
+}
+
+int KompareSplitter::pageSize()
+{
+	QSplitterLayoutStruct *curr;
+	for ( curr = d->list.first(); curr; curr = d->list.next() )
+	{
+		if ( !curr->isHandle )
+		{
+			KompareListView *view = ((KompareListViewFrame*) curr->wid)->view();
+			return view->visibleHeight() - QStyle::PM_ScrollBarExtent;
+		}
+	}
+	return 1;
+}
+
+bool KompareSplitter::needVScrollBar()
+{
+	QSplitterLayoutStruct *curr;
+	int pagesize = pageSize();
+	for ( curr = d->list.first(); curr; curr = d->list.next() )
+	{
+		if( !curr->isHandle )
+		{
+			KompareListView *view = ((KompareListViewFrame*) curr->wid)->view();
+			if( view ->contentsHeight() > pagesize)
+				return true;
+		}
+	}
+	return false;
+}
+
+int KompareSplitter::minVScrollId()
+{
+
+	QSplitterLayoutStruct *curr;
+	int min = -1;
+	int mSId;
+	for ( curr = d->list.first(); curr; curr = d->list.next() )
+	{
+		if(!curr->isHandle) {
+			KompareListView* view = ((KompareListViewFrame*)curr->wid)->view();
+			mSId = view->minScrollId();
+			if (mSId < min || min == -1) min = mSId;
+		}
+	}
+	return ( min == -1 ) ? 0 : min;
+}
+
+int KompareSplitter::maxVScrollId()
+{
+	QSplitterLayoutStruct *curr;
+	int max = 0;
+	int mSId;
+	for ( curr = d->list.first(); curr; curr = d->list.next() )
+	{
+		if ( !curr->isHandle )
+		{
+			mSId = ((KompareListViewFrame*)curr->wid)->view()->maxScrollId();
+			if ( mSId > max )
+				max = mSId;
+		}
+	}
+	return max;
+}
+
+bool KompareSplitter::needHScrollBar()
+{
+	QSplitterLayoutStruct *curr;
+	for ( curr = d->list.first(); curr; curr = d->list.next() )
+	{
+		if( !curr->isHandle )
+		{
+			KompareListView *view = ((KompareListViewFrame*) curr->wid)->view();
+			if ( view->contentsWidth() > view->visibleWidth() )
+				return true;
+		}
+	}
+	return false;
+}
+
+int KompareSplitter::maxHScrollId()
+{
+	QSplitterLayoutStruct *curr;
+	int max = 0;
+	int mHSId;
+	for ( curr = d->list.first(); curr; curr = d->list.next() )
+	{
+		if( !curr->isHandle )
+		{
+			KompareListView *view = ((KompareListViewFrame*) curr->wid)->view();
+			mHSId = view->contentsWidth() - view->visibleWidth();
+			if ( mHSId > max )
+				max = mHSId;
+		}
+	}
+	return max;
+}
+
+int KompareSplitter::maxContentsX()
+{
+	QSplitterLayoutStruct *curr;
+	int max = 0;
+	int mCX;
+	for ( curr = d->list.first(); curr; curr = d->list.next() )
+	{
+		if ( !curr->isHandle )
+		{
+			mCX = ((KompareListViewFrame*) curr->wid)->view()->contentsX();
+			if ( mCX > max )
+				max = mCX;
+		}
+	}
+	return max;
+}
+
+int KompareSplitter::minVisibleWidth()
+{
+	// Why the hell do we want to know this?
+	// ah yes, its because we use it to set the "page size" for horiz. scrolling.
+	// despite the fact that *noone* has a pgright and pgleft key :P
+	// But we do have mousewheels with horizontal scrolling functionality,
+	// pressing shift and scrolling then goes left and right one page at the time
+	QSplitterLayoutStruct *curr;
+	int min = -1;
+	int vW;
+	for( curr = d->list.first(); curr; curr = d->list.next() )
+	{
+		if ( !curr->isHandle ) {
+			vW = ((KompareListViewFrame*)curr->wid)->view()->visibleWidth();
+			if ( vW < min || min == -1 )
+				min = vW;
+		}
+	}
+	return ( min == -1 ) ? 0 : min;
+}
+
+#include "komparesplitter.moc"