/*  Copyright (c) 2006 Gábor Lehel <illissius@gmail.com>  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 <qpixmap.h>#include <qsimplerichtext.h>#include <kglobal.h>#include "debug.h"#include "tooltip.h"class Amarok::ToolTip::Manager: public QObject{public:    Manager( QObject *parent ): QObject( parent ) { qApp->installEventFilter( this ); }    virtual ~Manager()    {        for( int n = Amarok::ToolTip::s_tooltips.count() - 1; n >= 0; --n )            delete Amarok::ToolTip::s_tooltips[n];    }    bool eventFilter( QObject*, QEvent *e )    {        switch ( e->type() )        {            case QEvent::KeyPress:            case QEvent::KeyRelease:            case QEvent::MouseButtonPress:            case QEvent::MouseButtonRelease:            //case QEvent::MouseMove:            case QEvent::Wheel:                ToolTip::hideTips();                break;            case QEvent::FocusIn:            case QEvent::Enter:            case QEvent::Leave:            case QEvent::FocusOut:                if( !dynamic_cast<Amarok::ToolTip*>( qApp->widgetAt( QCursor::pos(), true ) ) )                    Amarok::ToolTip::hideTips();            default: break;        }        return false;    }};Amarok::ToolTip::Manager* Amarok::ToolTip::s_manager = 0;QPoint Amarok::ToolTip::s_pos;QRect Amarok::ToolTip::s_rect;QString Amarok::ToolTip::s_text;QValueList<Amarok::ToolTip*> Amarok::ToolTip::s_tooltips;int Amarok::ToolTip::s_hack = 0;void Amarok::ToolTip::add( ToolTipClient *client, QWidget *parent ) //static{    if( !s_manager )        s_manager = new Amarok::ToolTip::Manager( qApp );    new ToolTip( client, parent );}void Amarok::ToolTip::remove( QWidget *widget ) //static{    for( int i = s_tooltips.count() - 1; i >= 0; --i )        if( s_tooltips[i]->QToolTip::parentWidget() == widget )            delete s_tooltips[i];}void Amarok::ToolTip::hideTips() //static{    for( int i = 0, n = s_tooltips.count(); i < n; ++i )        s_tooltips[i]->hideTip();    QToolTip::hide();}QString Amarok::ToolTip::textFor( QWidget *widget, const QPoint &pos ) //static{    for( int i = 0, n = s_tooltips.count(); i < n; ++i )        if( s_tooltips[i]->QToolTip::parentWidget() == widget )            return s_tooltips[i]->m_client->toolTipText( widget, pos ).first;    return QToolTip::textFor( widget, pos );}void Amarok::ToolTip::updateTip() //static{    for( int i = 0, n = s_tooltips.count(); i < n; ++i )        if( s_tooltips[i]->isVisible() )        {            QWidget* const w = s_tooltips[i]->QToolTip::parentWidget();            QPair<QString, QRect> p = s_tooltips[i]->m_client->toolTipText( w, w->mapFromGlobal( s_pos ) );            QString prev = s_text;            if( prev != p.first )            {                s_text = p.first;                s_rect = p.second;                s_tooltips[i]->showTip();            }            break;        }}Amarok::ToolTip::ToolTip( ToolTipClient *client, QWidget *parent )    : QFrame( 0, 0, WStyle_Customize | WStyle_NoBorder | WStyle_Tool | WStyle_StaysOnTop | WX11BypassWM | WNoAutoErase ),      QToolTip( parent ),      m_client( client ){    s_tooltips.append( this );    QFrame::setPalette( QToolTip::palette() );    connect( &m_timer, SIGNAL( timeout() ), this, SLOT( hideTip() ) );}Amarok::ToolTip::~ToolTip(){    s_tooltips.remove( this );}void Amarok::ToolTip::maybeTip( const QPoint &pos ){    s_pos = QToolTip::parentWidget()->mapToGlobal( pos );    QString prev = s_text;    QPair<QString, QRect> p = m_client->toolTipText( QToolTip::parentWidget(), pos );    s_text = p.first;    s_rect = p.second;    if( QToolTip::parentWidget() && !s_text.isEmpty() )    {        if( s_text != prev )            hideTips();        showTip();    }    else        hideTips();}void Amarok::ToolTip::showTip(){    m_timer.start( 15000, true );    if( !isVisible() || sizeHint() != size() )    {        resize( sizeHint() );        position();    }    if( !isVisible() )        show();    else        update();}void Amarok::ToolTip::hideTip(){    if( !isVisible() )        return;    QFrame::hide();    QToolTip::parentWidget()->update();    m_timer.stop();    s_hack = 0;}void Amarok::ToolTip::drawContents( QPainter *painter ){    QPixmap buf( width(), height() );    QPainter p( &buf );    buf.fill( colorGroup().background() );    p.setPen( colorGroup().foreground() );    p.drawRect( buf.rect() );    QSimpleRichText text( s_text, QToolTip::parentWidget()->font() );    text.setWidth( width() );    p.translate( 0, height() / 2 - text.height() / 2);    QPoint pos = s_rect.isNull() ? QPoint(2, -1)               : s_hack == 1     ? QPoint(4, -2)               : QPoint(2, -2); //HACK positioning    p.setFont( QToolTip::parentWidget()->font() );    text.draw( &p, pos.x(), pos.y(), rect(), colorGroup() );    painter->drawPixmap( 0, 0, buf );}QSize Amarok::ToolTip::sizeHint() const{    if( !s_rect.isNull() )        return s_rect.size();    else    {        QSimpleRichText text( s_text, QToolTip::parentWidget()->font() );        text.setWidth( 500 ); //is this reasonable?        return QSize( text.widthUsed() - 2, text.height() );    }}void Amarok::ToolTip::position(){    const QRect drect = QApplication::desktop()->availableGeometry( QToolTip::parentWidget() );    const QSize size = sizeHint();    const int width = size.width(), height = size.height();    QPoint pos;    if( !s_rect.isNull() )    {        pos = s_rect.topLeft();        if( pos.y() + height > drect.bottom() )            pos.setY( kMax( drect.top(), drect.bottom() - height ) );        if( pos.x() + width > drect.right() )            pos.setX( kMax( drect.left(), drect.right() - width ) );    }    else    {        const QRect r = QRect( QToolTip::parentWidget()->mapToGlobal( QToolTip::parentWidget()->pos() ), QToolTip::parentWidget()->size() );        pos = r.bottomRight();        if( pos.y() + height > drect.bottom() )            pos.setY( kMax( drect.top(), r.top() - height ) );        if( pos.x() + width > drect.right() )            pos.setX( kMax( drect.left(), r.left() - width ) );    }    move( pos );}#include "tooltip.moc"