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/kdelibs@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 524 insertions, 0 deletions

diff --git a/kdeui/ktabwidget.cpp b/kdeui/ktabwidget.cpp
new file mode 100644
index 000000000..42e00c96a
--- /dev/null
+++ b/kdeui/ktabwidget.cpp
@@ -0,0 +1,524 @@
+/* This file is part of the KDE libraries
+    Copyright (C) 2003 Stephan Binner <binner@kde.org>
+    Copyright (C) 2003 Zack Rusin <zack@kde.org>
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public License
+    along with this library; see the file COPYING.LIB.  If not, write to
+    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+    Boston, MA 02110-1301, USA.
+*/
+
+#include <qapplication.h>
+#include <qstyle.h>
+#include <qstylesheet.h>
+
+#include <kconfig.h>
+#include <kiconloader.h>
+#include <kstringhandler.h>
+
+#include "ktabwidget.h"
+#include "ktabbar.h"
+
+class KTabWidgetPrivate {
+public:
+    bool m_automaticResizeTabs;
+    int m_maxLength;
+    int m_minLength;
+    unsigned int m_CurrentMaxLength;
+
+    //holds the full names of the tab, otherwise all we
+    //know about is the shortened name
+    QStringList m_tabNames;
+
+    KTabWidgetPrivate() {
+        m_automaticResizeTabs = false;
+        KConfigGroupSaver groupsaver(KGlobal::config(), "General");
+        m_maxLength = KGlobal::config()->readNumEntry("MaximumTabLength", 30);
+        m_minLength = KGlobal::config()->readNumEntry("MinimumTabLength", 3);
+        m_CurrentMaxLength = m_minLength;
+    }
+};
+
+KTabWidget::KTabWidget( QWidget *parent, const char *name, WFlags f )
+    : QTabWidget( parent, name, f )
+{
+    d = new KTabWidgetPrivate;
+    setTabBar( new KTabBar(this, "tabbar") );
+    setAcceptDrops( true );
+
+    connect(tabBar(), SIGNAL(contextMenu( int, const QPoint & )), SLOT(contextMenu( int, const QPoint & )));
+    connect(tabBar(), SIGNAL(mouseDoubleClick( int )), SLOT(mouseDoubleClick( int )));
+    connect(tabBar(), SIGNAL(mouseMiddleClick( int )), SLOT(mouseMiddleClick( int )));
+    connect(tabBar(), SIGNAL(initiateDrag( int )), SLOT(initiateDrag( int )));
+    connect(tabBar(), SIGNAL(testCanDecode(const QDragMoveEvent *, bool & )), SIGNAL(testCanDecode(const QDragMoveEvent *, bool & )));
+    connect(tabBar(), SIGNAL(receivedDropEvent( int, QDropEvent * )), SLOT(receivedDropEvent( int, QDropEvent * )));
+    connect(tabBar(), SIGNAL(moveTab( int, int )), SLOT(moveTab( int, int )));
+    connect(tabBar(), SIGNAL(closeRequest( int )), SLOT(closeRequest( int )));
+#ifndef QT_NO_WHEELEVENT
+    connect(tabBar(), SIGNAL(wheelDelta( int )), SLOT(wheelDelta( int )));
+#endif
+}
+
+KTabWidget::~KTabWidget()
+{
+    delete d;
+}
+
+void KTabWidget::insertTab( QWidget *child, const QString &label, int index )
+{
+    QTabWidget::insertTab( child, label, index );
+}
+
+void KTabWidget::insertTab( QWidget *child, const QIconSet& iconset, const QString &label, int index )
+{
+    QTabWidget::insertTab( child, iconset, label, index );
+}
+
+void KTabWidget::insertTab( QWidget *child, QTab *tab, int index )
+{
+    QTabWidget::insertTab( child, tab, index);
+    if ( d->m_automaticResizeTabs ) {
+        if ( index < 0 || index >= count() ) {
+            d->m_tabNames.append( tab->text() );
+            resizeTabs( d->m_tabNames.count()-1 );
+        }
+        else {
+            d->m_tabNames.insert( d->m_tabNames.at( index ), tab->text() );
+            resizeTabs( index );
+        }
+    }
+}
+
+void KTabWidget::setTabBarHidden( bool hide )
+{
+    QWidget *rightcorner = this->cornerWidget( TopRight );
+    QWidget *leftcorner = this->cornerWidget( TopLeft );
+
+    if ( hide ) {
+        if ( leftcorner ) leftcorner->hide();
+        if ( rightcorner ) rightcorner->hide();
+        tabBar()->hide();
+    } else {
+        tabBar()->show();
+        if ( leftcorner ) leftcorner->show();
+        if ( rightcorner ) rightcorner->show();
+    }
+}
+
+bool KTabWidget::isTabBarHidden() const
+{
+    return !( tabBar()->isVisible() );
+}
+
+void KTabWidget::setTabColor( QWidget *w, const QColor& color )
+{
+    QTab *t = tabBar()->tabAt( indexOf( w ) );
+    if (t) {
+        static_cast<KTabBar*>(tabBar())->setTabColor( t->identifier(), color );
+    }
+}
+
+QColor KTabWidget::tabColor( QWidget *w ) const
+{
+    QTab *t = tabBar()->tabAt( indexOf( w ) );
+    if (t) {
+        return static_cast<KTabBar*>(tabBar())->tabColor( t->identifier() );
+    } else {
+        return QColor();
+    }
+}
+
+void KTabWidget::setTabReorderingEnabled( bool on)
+{
+    static_cast<KTabBar*>(tabBar())->setTabReorderingEnabled( on );
+}
+
+bool KTabWidget::isTabReorderingEnabled() const
+{
+    return static_cast<KTabBar*>(tabBar())->isTabReorderingEnabled();
+}
+
+void KTabWidget::setTabCloseActivatePrevious( bool previous)
+{
+    static_cast<KTabBar*>(tabBar())->setTabCloseActivatePrevious( previous );
+}
+
+bool KTabWidget::tabCloseActivatePrevious() const
+{
+    return static_cast<KTabBar*>(tabBar())->tabCloseActivatePrevious();
+}
+
+unsigned int KTabWidget::tabBarWidthForMaxChars( uint maxLength )
+{
+    int hframe, overlap;
+    hframe  = tabBar()->style().pixelMetric( QStyle::PM_TabBarTabHSpace, tabBar() );
+    overlap = tabBar()->style().pixelMetric( QStyle::PM_TabBarTabOverlap, tabBar() );
+
+    QFontMetrics fm = tabBar()->fontMetrics();
+    int x = 0;
+    for( int i=0; i < count(); ++i ) {
+        QString newTitle = d->m_tabNames[ i ];
+        newTitle = KStringHandler::rsqueeze( newTitle, maxLength ).leftJustify( d->m_minLength, ' ' );
+
+        QTab* tab = tabBar()->tabAt( i );
+        int lw = fm.width( newTitle );
+        int iw = 0;
+        if ( tab->iconSet() )
+          iw = tab->iconSet()->pixmap( QIconSet::Small, QIconSet::Normal ).width() + 4;
+        x += ( tabBar()->style().sizeFromContents( QStyle::CT_TabBarTab, this,
+                   QSize( QMAX( lw + hframe + iw, QApplication::globalStrut().width() ), 0 ),
+                   QStyleOption( tab ) ) ).width();
+    }
+    return x;
+}
+
+void KTabWidget::changeTab( QWidget *w, const QString &label )
+{
+    QTabWidget::changeTab( w, label );
+    if ( d->m_automaticResizeTabs ) {
+        int index = indexOf( w );
+        if ( index != -1 ) {
+            d->m_tabNames[ index ] = label;
+            resizeTabs( index );
+        }
+    }
+}
+
+void KTabWidget::changeTab( QWidget *w, const QIconSet &iconset, const QString &label )
+{
+    QTabWidget::changeTab( w, iconset, label );
+    if ( d->m_automaticResizeTabs ) {
+        int index = indexOf( w );
+        if ( index != -1 ) {
+            d->m_tabNames[ index ] = label;
+            resizeTabs( index );
+        }
+    }
+}
+
+QString KTabWidget::label( int index ) const
+{
+    if ( d->m_automaticResizeTabs ) {
+        if ( index >= 0 && index < count() )
+            return d->m_tabNames[ index ];
+        else
+            return QString::null;
+    }
+    else
+        return QTabWidget::label( index );
+}
+
+QString KTabWidget::tabLabel( QWidget * w ) const
+{
+    if ( d->m_automaticResizeTabs ) {
+        int index = indexOf( w );
+        if ( index == -1 )
+            return QString::null;
+        else
+            return d->m_tabNames[ index ];
+    }
+    else
+        return QTabWidget::tabLabel( w );
+}
+
+void KTabWidget::setTabLabel( QWidget *w, const QString &l )
+{
+    QTabWidget::setTabLabel( w, l );
+    if ( d->m_automaticResizeTabs ) {
+        int index = indexOf( w );
+        if ( index != -1 ) {
+            d->m_tabNames[ index ] = l;
+            resizeTabs( index );
+        }
+  }
+}
+
+void KTabWidget::resizeTabs( int changeTabIndex )
+{
+    uint newMaxLength;
+    if ( d->m_automaticResizeTabs ) {
+        // Calculate new max length
+        newMaxLength=d->m_maxLength;
+        uint lcw=0, rcw=0;
+
+        int tabBarHeight = tabBar()->sizeHint().height();
+        if ( cornerWidget( TopLeft ) && cornerWidget( TopLeft )->isVisible() )
+            lcw = QMAX( cornerWidget( TopLeft )->width(), tabBarHeight );
+        if ( cornerWidget( TopRight ) && cornerWidget( TopRight )->isVisible() )
+            rcw = QMAX( cornerWidget( TopRight )->width(), tabBarHeight );
+
+        uint maxTabBarWidth = width() - lcw - rcw;
+
+        for ( ; newMaxLength > (uint)d->m_minLength; newMaxLength-- ) {
+            if ( tabBarWidthForMaxChars( newMaxLength ) < maxTabBarWidth )
+                break;
+        }
+    }
+    else
+        newMaxLength = 4711;
+
+    // Update hinted or all tabs
+    if ( d->m_CurrentMaxLength != newMaxLength ) {
+        d->m_CurrentMaxLength = newMaxLength;
+        for( int i = 0; i < count(); ++i )
+            updateTab( i );
+    }
+    else if ( changeTabIndex != -1 )
+        updateTab( changeTabIndex );
+}
+
+void KTabWidget::updateTab( int index )
+{
+    QString title = d->m_automaticResizeTabs ? d->m_tabNames[ index ] : QTabWidget::label( index );
+    removeTabToolTip( page( index ) );
+    if ( title.length() > d->m_CurrentMaxLength ) {
+        if ( QStyleSheet::mightBeRichText( title ) )
+            setTabToolTip( page( index ), QStyleSheet::escape(title) );
+        else
+            setTabToolTip( page( index ), title );
+    }
+
+    title = KStringHandler::rsqueeze( title, d->m_CurrentMaxLength ).leftJustify( d->m_minLength, ' ' );
+    title.replace( '&', "&&" );
+
+    if ( QTabWidget::label( index ) != title )
+        QTabWidget::setTabLabel( page( index ), title );
+}
+
+void KTabWidget::dragMoveEvent( QDragMoveEvent *e )
+{
+    if ( isEmptyTabbarSpace( e->pos() ) ) {
+        bool accept = false;
+        // The receivers of the testCanDecode() signal has to adjust
+        // 'accept' accordingly.
+        emit testCanDecode( e, accept);
+        e->accept( accept );
+        return;
+    }
+    e->accept( false );
+    QTabWidget::dragMoveEvent( e );
+}
+
+void KTabWidget::dropEvent( QDropEvent *e )
+{
+    if ( isEmptyTabbarSpace( e->pos() ) ) {
+        emit ( receivedDropEvent( e ) );
+        return;
+    }
+    QTabWidget::dropEvent( e );
+}
+
+#ifndef QT_NO_WHEELEVENT
+void KTabWidget::wheelEvent( QWheelEvent *e )
+{
+    if ( e->orientation() == Horizontal )
+        return;
+
+    if ( isEmptyTabbarSpace( e->pos() ) )
+        wheelDelta( e->delta() );
+    else
+        e->ignore();
+}
+
+void KTabWidget::wheelDelta( int delta )
+{
+    if ( count() < 2 )
+        return;
+
+    int page = currentPageIndex();
+    if ( delta < 0 )
+         page = (page + 1) % count();
+    else {
+        page--;
+        if ( page < 0 )
+            page = count() - 1;
+    }
+    setCurrentPage( page );
+}
+#endif
+
+void KTabWidget::mouseDoubleClickEvent( QMouseEvent *e )
+{
+    if( e->button() != LeftButton )
+        return;
+
+    if ( isEmptyTabbarSpace( e->pos() ) ) {
+        emit( mouseDoubleClick() );
+        return;
+    }
+    QTabWidget::mouseDoubleClickEvent( e );
+}
+
+void KTabWidget::mousePressEvent( QMouseEvent *e )
+{
+    if ( e->button() == RightButton ) {
+        if ( isEmptyTabbarSpace( e->pos() ) ) {
+            emit( contextMenu( mapToGlobal( e->pos() ) ) );
+            return;
+        }
+    } else if ( e->button() == MidButton ) {
+        if ( isEmptyTabbarSpace( e->pos() ) ) {
+            emit( mouseMiddleClick() );
+            return;
+        }
+    }
+    QTabWidget::mousePressEvent( e );
+}
+
+void KTabWidget::receivedDropEvent( int index, QDropEvent *e )
+{
+    emit( receivedDropEvent( page( index ), e ) );
+}
+
+void KTabWidget::initiateDrag( int index )
+{
+    emit( initiateDrag( page( index ) ) );
+}
+
+void KTabWidget::contextMenu( int index, const QPoint &p )
+{
+    emit( contextMenu( page( index ), p ) );
+}
+
+void KTabWidget::mouseDoubleClick( int index )
+{
+    emit( mouseDoubleClick( page( index ) ) );
+}
+
+void KTabWidget::mouseMiddleClick( int index )
+{
+    emit( mouseMiddleClick( page( index ) ) );
+}
+
+void KTabWidget::moveTab( int from, int to )
+{
+    QString tablabel = label( from );
+    QWidget *w = page( from );
+    QColor color = tabColor( w );
+    QIconSet tabiconset = tabIconSet( w );
+    QString tabtooltip = tabToolTip( w );
+    bool current = ( w == currentPage() );
+    bool enabled = isTabEnabled( w );
+    blockSignals(true);
+    removePage( w );
+
+    // Work-around kmdi brain damage which calls showPage() in insertTab()
+    QTab * t = new QTab();
+    t->setText(tablabel);
+    QTabWidget::insertTab( w, t, to );
+    if ( d->m_automaticResizeTabs ) {
+        if ( to < 0 || to >= count() )
+            d->m_tabNames.append( QString::null );
+        else
+            d->m_tabNames.insert( d->m_tabNames.at( to ), QString::null );
+    }
+
+    w = page( to );
+    changeTab( w, tabiconset, tablabel );
+    setTabToolTip( w, tabtooltip );
+    setTabColor( w, color );
+    if ( current )
+        showPage( w );
+    setTabEnabled( w, enabled );
+    blockSignals(false);
+
+    emit ( movedTab( from, to ) );
+}
+
+void KTabWidget::removePage( QWidget * w ) {
+    if ( d->m_automaticResizeTabs ) {
+        int index = indexOf( w );
+        if ( index != -1 )
+            d->m_tabNames.remove( d->m_tabNames.at( index ) );
+    }
+    QTabWidget::removePage( w );
+    if ( d->m_automaticResizeTabs )
+        resizeTabs();
+}
+
+
+bool KTabWidget::isEmptyTabbarSpace( const QPoint &point ) const
+{
+    QSize size( tabBar()->sizeHint() );
+    if ( ( tabPosition()==Top && point.y()< size.height() ) || ( tabPosition()==Bottom && point.y()>(height()-size.height() ) ) ) {
+        QWidget *rightcorner = cornerWidget( TopRight );
+        if ( rightcorner ) {
+            if ( point.x()>=width()-rightcorner->width() )
+                return false;
+        }
+        QWidget *leftcorner = cornerWidget( TopLeft );
+        if ( leftcorner ) {
+            if ( point.x()<=leftcorner->width() )
+                return false;
+        }
+        QTab *tab = tabBar()->selectTab( tabBar()->mapFromParent( point ) );
+        if( !tab )
+            return true;
+    }
+    return false;
+}
+
+void KTabWidget::setHoverCloseButton( bool button )
+{
+    static_cast<KTabBar*>(tabBar())->setHoverCloseButton( button );
+}
+
+bool KTabWidget::hoverCloseButton() const
+{
+    return static_cast<KTabBar*>(tabBar())->hoverCloseButton();
+}
+
+void KTabWidget::setHoverCloseButtonDelayed( bool delayed )
+{
+    static_cast<KTabBar*>(tabBar())->setHoverCloseButtonDelayed( delayed );
+}
+
+bool KTabWidget::hoverCloseButtonDelayed() const
+{
+    return static_cast<KTabBar*>(tabBar())->hoverCloseButtonDelayed();
+}
+
+void KTabWidget::setAutomaticResizeTabs( bool enabled )
+{
+    if ( d->m_automaticResizeTabs==enabled )
+        return;
+
+    d->m_automaticResizeTabs = enabled;
+    if ( enabled ) {
+        d->m_tabNames.clear();
+        for( int i = 0; i < count(); ++i )
+            d->m_tabNames.append( tabBar()->tabAt( i )->text() );
+    }
+    else
+        for( int i = 0; i < count(); ++i )
+            tabBar()->tabAt( i )->setText( d->m_tabNames[ i ] );
+    resizeTabs();
+}
+
+bool KTabWidget::automaticResizeTabs() const
+{
+    return d->m_automaticResizeTabs;
+}
+
+void KTabWidget::closeRequest( int index )
+{
+    emit( closeRequest( page( index ) ) );
+}
+
+void KTabWidget::resizeEvent( QResizeEvent *e )
+{
+    QTabWidget::resizeEvent( e );
+    resizeTabs();
+}
+
+#include "ktabwidget.moc"