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, 427 insertions, 0 deletions

diff --git a/kdeui/ktabbar.cpp b/kdeui/ktabbar.cpp
new file mode 100644
index 000000000..fcac5a975
--- /dev/null
+++ b/kdeui/ktabbar.cpp
@@ -0,0 +1,427 @@
+/* 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 <qcursor.h>
+#include <qpainter.h>
+#include <qstyle.h>
+#include <qtimer.h>
+#include <qpushbutton.h>
+#include <qtooltip.h>
+
+#include <kglobalsettings.h>
+#include <kiconloader.h>
+#include <klocale.h>
+
+#include "ktabbar.h"
+#include "ktabwidget.h"
+
+KTabBar::KTabBar( QWidget *parent, const char *name )
+    : QTabBar( parent, name ), mReorderStartTab( -1 ), mReorderPreviousTab( -1 ),
+      mHoverCloseButtonTab( 0 ), mDragSwitchTab( 0 ), mHoverCloseButton( 0 ),
+      mHoverCloseButtonEnabled( false ), mHoverCloseButtonDelayed( true ),
+      mTabReorderingEnabled( false ), mTabCloseActivatePrevious( false )
+{
+    setAcceptDrops( true );
+    setMouseTracking( true );
+
+    mEnableCloseButtonTimer = new QTimer( this );
+    connect( mEnableCloseButtonTimer, SIGNAL( timeout() ), SLOT( enableCloseButton() ) );
+
+    mActivateDragSwitchTabTimer = new QTimer( this );
+    connect( mActivateDragSwitchTabTimer, SIGNAL( timeout() ), SLOT( activateDragSwitchTab() ) );
+
+    connect(this, SIGNAL(layoutChanged()), SLOT(onLayoutChange()));
+}
+
+KTabBar::~KTabBar()
+{
+    //For the future
+    //delete d;
+}
+
+void KTabBar::setTabEnabled( int id, bool enabled )
+{
+    QTab * t = tab( id );
+    if ( t ) {
+        if ( t->isEnabled() != enabled ) {
+            t->setEnabled( enabled );
+            QRect r( t->rect() );
+            if ( !enabled && id == currentTab() && count()>1 ) {
+                QPtrList<QTab> *tablist = tabList();
+                if ( mTabCloseActivatePrevious )
+                    t = tablist->at( count()-2 );
+                else {
+                int index = indexOf( id );
+                index += ( index+1 == count() ) ? -1 : 1;
+                t = tabAt( index );
+                }
+
+                if ( t->isEnabled() ) {
+                    r = r.unite( t->rect() );
+                    tablist->append( tablist->take( tablist->findRef( t ) ) );
+                    emit selected( t->identifier() );
+                }
+            }
+            repaint( r );
+        }
+    }
+}
+
+void KTabBar::mouseDoubleClickEvent( QMouseEvent *e )
+{
+    if( e->button() != LeftButton )
+        return;
+
+    QTab *tab = selectTab( e->pos() );
+    if( tab ) {
+        emit( mouseDoubleClick( indexOf( tab->identifier() ) ) );
+        return;
+    }
+    QTabBar::mouseDoubleClickEvent( e );
+}
+
+void KTabBar::mousePressEvent( QMouseEvent *e )
+{
+    if( e->button() == LeftButton ) {
+        mEnableCloseButtonTimer->stop();
+        mDragStart = e->pos();
+    }
+    else if( e->button() == RightButton ) {
+        QTab *tab = selectTab( e->pos() );
+        if( tab ) {
+            emit( contextMenu( indexOf( tab->identifier() ), mapToGlobal( e->pos() ) ) );
+            return;
+        }
+    }
+    QTabBar::mousePressEvent( e );
+}
+
+void KTabBar::mouseMoveEvent( QMouseEvent *e )
+{
+    if ( e->state() == LeftButton ) {
+        QTab *tab = selectTab( e->pos() );
+        if ( mDragSwitchTab && tab != mDragSwitchTab ) {
+          mActivateDragSwitchTabTimer->stop();
+          mDragSwitchTab = 0;
+        }
+
+        int delay = KGlobalSettings::dndEventDelay();
+        QPoint newPos = e->pos();
+        if( newPos.x() > mDragStart.x()+delay || newPos.x() < mDragStart.x()-delay ||
+            newPos.y() > mDragStart.y()+delay || newPos.y() < mDragStart.y()-delay )
+         {
+            if( tab ) {
+                emit( initiateDrag( indexOf( tab->identifier() ) ) );
+                return;
+           }
+       }
+    }
+    else if ( e->state() == MidButton ) {
+        if (mReorderStartTab==-1) {
+            int delay = KGlobalSettings::dndEventDelay();
+            QPoint newPos = e->pos();
+            if( newPos.x() > mDragStart.x()+delay || newPos.x() < mDragStart.x()-delay ||
+                newPos.y() > mDragStart.y()+delay || newPos.y() < mDragStart.y()-delay )
+            {
+                QTab *tab = selectTab( e->pos() );
+                if( tab && mTabReorderingEnabled ) {
+                    mReorderStartTab = indexOf( tab->identifier() );
+                    grabMouse( sizeAllCursor );
+                    return;
+                }
+            }
+        }
+        else {
+            QTab *tab = selectTab( e->pos() );
+            if( tab ) {
+                int reorderStopTab = indexOf( tab->identifier() );
+                if ( mReorderStartTab!=reorderStopTab && mReorderPreviousTab!=reorderStopTab ) {
+                    emit( moveTab( mReorderStartTab, reorderStopTab ) );
+                    mReorderPreviousTab=mReorderStartTab;
+                    mReorderStartTab=reorderStopTab;
+                    return;
+                }
+            }
+        }
+    }
+
+    if ( mHoverCloseButtonEnabled && mReorderStartTab==-1) {
+        QTab *t = selectTab( e->pos() );
+        if( t && t->iconSet() && t->isEnabled() ) {
+            QPixmap pixmap = t->iconSet()->pixmap( QIconSet::Small, QIconSet::Normal );
+            QRect rect( 0, 0, pixmap.width() + 4, pixmap.height() +4);
+
+            int xoff = 0, yoff = 0;
+            // The additional offsets were found by try and error, TODO: find the rational behind them
+            if ( t == tab( currentTab() ) ) {
+                xoff = style().pixelMetric( QStyle::PM_TabBarTabShiftHorizontal, this ) + 3;
+                yoff = style().pixelMetric( QStyle::PM_TabBarTabShiftVertical, this ) - 4;
+            }
+            else {
+                xoff = 7;
+                yoff = 0;
+            }
+            rect.moveLeft( t->rect().left() + 2 + xoff );
+            rect.moveTop( t->rect().center().y()-pixmap.height()/2 + yoff );
+            if ( rect.contains( e->pos() ) ) {
+                if ( mHoverCloseButton ) {
+                    if ( mHoverCloseButtonTab == t )
+                        return;
+                    mEnableCloseButtonTimer->stop();
+                    mHoverCloseButton->deleteLater();
+                    mHoverCloseButton = 0;
+                }
+
+                mHoverCloseButton = new QPushButton( this );
+                mHoverCloseButton->setIconSet( KGlobal::iconLoader()->loadIconSet("fileclose", KIcon::Toolbar, KIcon::SizeSmall) );
+                mHoverCloseButton->setGeometry( rect );
+                QToolTip::add(mHoverCloseButton,i18n("Close this tab"));
+                mHoverCloseButton->setFlat(true);
+                mHoverCloseButton->show();
+                if ( mHoverCloseButtonDelayed ) {
+                  mHoverCloseButton->setEnabled(false);
+                  mEnableCloseButtonTimer->start( QApplication::doubleClickInterval(), true );
+                }
+                mHoverCloseButtonTab = t;
+                connect( mHoverCloseButton, SIGNAL( clicked() ), SLOT( closeButtonClicked() ) );
+                return;
+            }
+        }
+        if ( mHoverCloseButton ) {
+            mEnableCloseButtonTimer->stop();
+            mHoverCloseButton->deleteLater();
+            mHoverCloseButton = 0;
+        }
+    }
+
+    QTabBar::mouseMoveEvent( e );
+}
+
+void KTabBar::enableCloseButton()
+{
+    mHoverCloseButton->setEnabled(true);
+}
+
+void KTabBar::activateDragSwitchTab()
+{
+    QTab *tab = selectTab( mapFromGlobal( QCursor::pos() ) );
+    if ( tab && mDragSwitchTab == tab )
+    setCurrentTab( mDragSwitchTab );
+    mDragSwitchTab = 0;
+}
+
+void KTabBar::mouseReleaseEvent( QMouseEvent *e )
+{
+    if( e->button() == MidButton ) {
+        if ( mReorderStartTab==-1 ) {
+            QTab *tab = selectTab( e->pos() );
+            if( tab ) {
+                emit( mouseMiddleClick( indexOf( tab->identifier() ) ) );
+                return;
+            }
+        }
+        else {
+            releaseMouse();
+            setCursor( arrowCursor );
+            mReorderStartTab=-1;
+            mReorderPreviousTab=-1;
+        }
+    }
+    QTabBar::mouseReleaseEvent( e );
+}
+
+void KTabBar::dragMoveEvent( QDragMoveEvent *e )
+{
+    QTab *tab = selectTab( e->pos() );
+    if( tab ) {
+        bool accept = false;
+        // The receivers of the testCanDecode() signal has to adjust
+        // 'accept' accordingly.
+        emit testCanDecode( e, accept);
+        if ( accept && tab != QTabBar::tab( currentTab() ) ) {
+          mDragSwitchTab = tab;
+          mActivateDragSwitchTabTimer->start( QApplication::doubleClickInterval()*2, true );
+        }
+        e->accept( accept );
+        return;
+    }
+    e->accept( false );
+    QTabBar::dragMoveEvent( e );
+}
+
+void KTabBar::dropEvent( QDropEvent *e )
+{
+    QTab *tab = selectTab( e->pos() );
+    if( tab ) {
+        mActivateDragSwitchTabTimer->stop();
+        mDragSwitchTab = 0;
+        emit( receivedDropEvent( indexOf( tab->identifier() ) , e ) );
+        return;
+    }
+    QTabBar::dropEvent( e );
+}
+
+#ifndef QT_NO_WHEELEVENT
+void KTabBar::wheelEvent( QWheelEvent *e )
+{
+    if ( e->orientation() == Horizontal )
+        return;
+
+    emit( wheelDelta( e->delta() ) );
+}
+#endif
+
+void KTabBar::setTabColor( int id, const QColor& color )
+{
+    QTab *t = tab( id );
+    if ( t ) {
+        mTabColors.insert( id, color );
+        repaint( t->rect(), false );
+    }
+}
+
+const QColor &KTabBar::tabColor( int id  ) const
+{
+    if ( mTabColors.contains( id ) )
+        return mTabColors[id];
+
+    return colorGroup().foreground();
+}
+
+int KTabBar::insertTab( QTab *t, int index )
+{
+    int res = QTabBar::insertTab( t, index );
+
+    if ( mTabCloseActivatePrevious && count() > 2 ) {
+        QPtrList<QTab> *tablist = tabList();
+        tablist->insert( count()-2, tablist->take( tablist->findRef( t ) ) );
+    }
+
+    return res;
+}
+
+void KTabBar::removeTab( QTab *t )
+{
+    mTabColors.remove( t->identifier() );
+    QTabBar::removeTab( t );
+}
+
+void KTabBar::paintLabel( QPainter *p, const QRect& br,
+                          QTab *t, bool has_focus ) const
+{
+    QRect r = br;
+    bool selected = currentTab() == t->identifier();
+    if ( t->iconSet() ) {
+        // the tab has an iconset, draw it in the right mode
+        QIconSet::Mode mode = ( t->isEnabled() && isEnabled() )
+                                 ? QIconSet::Normal : QIconSet::Disabled;
+        if ( mode == QIconSet::Normal && has_focus )
+            mode = QIconSet::Active;
+        QPixmap pixmap = t->iconSet()->pixmap( QIconSet::Small, mode );
+        int pixw = pixmap.width();
+        int pixh = pixmap.height();
+        r.setLeft( r.left() + pixw + 4 );
+        r.setRight( r.right() + 2 );
+
+        int inactiveXShift = style().pixelMetric( QStyle::PM_TabBarTabShiftHorizontal, this );
+        int inactiveYShift = style().pixelMetric( QStyle::PM_TabBarTabShiftVertical, this );
+
+        int right = t->text().isEmpty() ? br.right() - pixw : br.left() + 2;
+
+        p->drawPixmap( right + (selected ? 0 : inactiveXShift),
+                       br.center().y() - pixh / 2 + (selected ? 0 : inactiveYShift),
+                       pixmap );
+    }
+
+    QStyle::SFlags flags = QStyle::Style_Default;
+
+    if ( isEnabled() && t->isEnabled() )
+        flags |= QStyle::Style_Enabled;
+    if ( has_focus )
+        flags |= QStyle::Style_HasFocus;
+
+    QColorGroup cg( colorGroup() );
+    if ( mTabColors.contains( t->identifier() ) )
+        cg.setColor( QColorGroup::Foreground, mTabColors[t->identifier()] );
+
+    style().drawControl( QStyle::CE_TabBarLabel, p, this, r,
+                             t->isEnabled() ? cg : palette().disabled(),
+                             flags, QStyleOption(t) );
+}
+
+bool KTabBar::isTabReorderingEnabled() const
+{
+    return mTabReorderingEnabled;
+}
+
+void KTabBar::setTabReorderingEnabled( bool on )
+{
+    mTabReorderingEnabled = on;
+}
+
+bool KTabBar::tabCloseActivatePrevious() const
+{
+    return mTabCloseActivatePrevious;
+}
+
+void KTabBar::setTabCloseActivatePrevious( bool on )
+{
+    mTabCloseActivatePrevious = on;
+}
+
+void KTabBar::closeButtonClicked()
+{
+    emit closeRequest( indexOf( mHoverCloseButtonTab->identifier() ) );
+}
+
+void KTabBar::setHoverCloseButton( bool button )
+{
+    mHoverCloseButtonEnabled = button;
+    if ( !button )
+        onLayoutChange();
+}
+
+bool KTabBar::hoverCloseButton() const
+{
+    return mHoverCloseButtonEnabled;
+}
+
+void KTabBar::setHoverCloseButtonDelayed( bool delayed )
+{
+    mHoverCloseButtonDelayed = delayed;
+}
+
+bool KTabBar::hoverCloseButtonDelayed() const
+{
+    return mHoverCloseButtonDelayed;
+}
+
+void KTabBar::onLayoutChange()
+{
+    mEnableCloseButtonTimer->stop();
+    delete mHoverCloseButton;
+    mHoverCloseButton = 0;
+    mHoverCloseButtonTab = 0;
+    mActivateDragSwitchTabTimer->stop();
+    mDragSwitchTab = 0;
+}
+
+#include "ktabbar.moc"