src/tooltip.cpp

   1 /*
   2   Copyright (c) 2006 Gábor Lehel <illissius@gmail.com>
   3
   4   This library is free software; you can redistribute it and/or
   5   modify it under the terms of the GNU Library General Public
   6   License as published by the Free Software Foundation; either
   7   version 2 of the License, or (at your option) any later version.
   8
   9   This library is distributed in the hope that it will be useful,
  10   but WITHOUT ANY WARRANTY; without even the implied warranty of
  11   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12   Library General Public License for more details.
  13
  14   You should have received a copy of the GNU Library General Public License
  15   along with this library; see the file COPYING.LIB.  If not, write to
  16   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  17   Boston, MA 02110-1301, USA.
  18 */
  19
  20 #include "tooltip.h"
  21
  22 #include "debug.h"
  23
  24 #include <KApplication>
  25 #include <KGlobal>
  26
  27 #include <q3simplerichtext.h>
  28 #include <Q3ValueList>
  29 #include <QApplication>
  30 #include <QCursor>
  31 #include <QEvent>
  32 #include <QFrame>
  33 #include <QPainter>
  34 #include <QPixmap>
  35
  36
  37 class Amarok::ToolTip::Manager: public QObject
  38 {
  39 public:
  40     Manager( QObject *parent ): QObject( parent ) { kapp->installEventFilter( this ); }
  41     virtual ~Manager()
  42     {
  43         for( int n = Amarok::ToolTip::s_tooltips.count() - 1; n >= 0; --n )
  44             delete Amarok::ToolTip::s_tooltips[n];
  45     }
  46
  47     bool eventFilter( QObject*, QEvent *e )
  48     {
  49         switch ( e->type() )
  50         {
  51             case QEvent::KeyPress:
  52             case QEvent::KeyRelease:
  53             case QEvent::MouseButtonPress:
  54             case QEvent::MouseButtonRelease:
  55             //case QEvent::MouseMove:
  56             case QEvent::Wheel:
  57                 ToolTip::hideTips();
  58                 break;
  59             case QEvent::FocusIn:
  60             case QEvent::Enter:
  61             case QEvent::Leave:
  62             case QEvent::FocusOut:
  63                 if( !dynamic_cast<Amarok::ToolTip*>( kapp->widgetAt( QCursor::pos() ) ) )
  64                     Amarok::ToolTip::hideTips();
  65             default: break;
  66         }
  67
  68         return false;
  69     }
  70 };
  71
  72 Amarok::ToolTip::Manager* Amarok::ToolTip::s_manager = 0;
  73 QPoint Amarok::ToolTip::s_pos;
  74 QRect Amarok::ToolTip::s_rect;
  75 QString Amarok::ToolTip::s_text;
  76 Q3ValueList<Amarok::ToolTip*> Amarok::ToolTip::s_tooltips;
  77 int Amarok::ToolTip::s_hack = 0;
  78
  79 void Amarok::ToolTip::add( ToolTipClient *client, QWidget *parent ) //static
  80 {
  81     Q_UNUSED( client ); Q_UNUSED( parent );
  82     //if( !s_manager )
  83     //    s_manager = new Amarok::ToolTip::Manager( kapp );
  84     //new ToolTip( client, parent );
  85 }
  86
  87 void Amarok::ToolTip::remove( QWidget *widget ) //static
  88 {
  89     Q_UNUSED( widget );
  90     //for( int i = s_tooltips.count() - 1; i >= 0; --i )
  91     //    if( s_tooltips[i]->QToolTip::parentWidget() == widget )
  92     //        delete s_tooltips[i];
  93 }
  94
  95 void Amarok::ToolTip::hideTips() //static
  96 {
  97     //for( int i = 0, n = s_tooltips.count(); i < n; ++i )
  98     //    s_tooltips[i]->hideTip();
  99     //QToolTip::hide();
 100 }
 101
 102 QString Amarok::ToolTip::textFor( QWidget *widget, const QPoint &pos ) //static
 103 {
 104     Q_UNUSED( widget ); Q_UNUSED( pos );
 105     /*for( int i = 0, n = s_tooltips.count(); i < n; ++i )
 106         if( s_tooltips[i]->QToolTip::parentWidget() == widget )
 107             return s_tooltips[i]->m_client->toolTipText( widget, pos ).first;
 108     return QToolTip::textFor( widget, pos );*/
 109     return QString();
 110 }
 111
 112 void Amarok::ToolTip::updateTip() //static
 113 {
 114     for( int i = 0, n = s_tooltips.count(); i < n; ++i )
 115         if( s_tooltips[i]->isVisible() )
 116         {
 117             /*QWidget* const w = s_tooltips[i]->QToolTip::parentWidget();
 118             QPair<QString, QRect> p = s_tooltips[i]->m_client->toolTipText( w, w->mapFromGlobal( s_pos ) );
 119             QString prev = s_text;
 120             if( prev != p.first )
 121             {
 122                 s_text = p.first;
 123                 s_rect = p.second;
 124                 s_tooltips[i]->showTip();
 125             }*/
 126             break;
 127         }
 128 }
 129
 130 Amarok::ToolTip::ToolTip( ToolTipClient *client, QWidget *parent )
 131     : QFrame(0,  0, Qt::FramelessWindowHint | Qt::Tool | Qt::WindowStaysOnTopHint
 132                     | Qt::X11BypassWindowManagerHint ),
 133 //      QToolTip( ),
 134       m_client( client )
 135 {
 136     s_tooltips.append( this );
 137     QFrame::setPalette( QToolTip::palette() );
 138     connect( &m_timer, SIGNAL( timeout() ), this, SLOT( hideTip() ) );
 139 }
 140
 141 Amarok::ToolTip::~ToolTip()
 142 {
 143     s_tooltips.remove( this );
 144 }
 145
 146 void Amarok::ToolTip::maybeTip( const QPoint &pos )
 147 {
 148     /*s_pos = QToolTip::parentWidget()->mapToGlobal( pos );
 149     QString prev = s_text;
 150     QPair<QString, QRect> p = m_client->toolTipText( QToolTip::parentWidget(), pos );
 151     s_text = p.first;
 152     s_rect = p.second;
 153     if( QToolTip::parentWidget() && !s_text.isEmpty() )
 154     {
 155         if( s_text != prev )
 156             hideTips();
 157         showTip();
 158     }
 159     else
 160         hideTips();*/
 161 }
 162
 163 void Amarok::ToolTip::showTip()
 164 {
 165     m_timer.start( 15000, true );
 166     if( !isVisible() || sizeHint() != size() )
 167     {
 168         resize( sizeHint() );
 169         position();
 170     }
 171     if( !isVisible() )
 172         show();
 173     else
 174         update();
 175 }
 176
 177 void Amarok::ToolTip::hideTip()
 178 {
 179     if( !isVisible() )
 180         return;
 181     QFrame::hide();
 182     //QToolTip::parentWidget()->update();
 183     m_timer.stop();
 184     s_hack = 0;
 185 }
 186
 187 void Amarok::ToolTip::drawContents( QPainter *painter )
 188 {
 189     /*QPixmap buf( width(), height() );
 190     QPainter p( &buf );
 191     buf.fill( colorGroup().background() );
 192
 193     p.setPen( colorGroup().foreground() );
 194     p.drawRect( buf.rect() );
 195
 196     Q3SimpleRichText text( s_text, QToolTip::parentWidget()->font() );
 197     text.setWidth( width() );
 198     p.translate( 0, height() / 2 - text.height() / 2);
 199     QPoint pos = s_rect.isNull() ? QPoint(2, -1)
 200                : s_hack == 1     ? QPoint(4, -2)
 201                : QPoint(2, -2); //HACK positioning
 202     p.setFont( QToolTip::parentWidget()->font() );
 203     text.draw( &p, pos.x(), pos.y(), rect(), colorGroup() );
 204
 205     painter->drawPixmap( 0, 0, buf );*/
 206 }
 207
 208 QSize Amarok::ToolTip::sizeHint() const
 209 {
 210     if( !s_rect.isNull() )
 211         return s_rect.size();
 212     else
 213     {
 214         //Q3SimpleRichText text( s_text, QToolTip::parentWidget()->font() );
 215         //text.setWidth( 500 ); //is this reasonable?
 216         //return QSize( text.widthUsed() - 2, text.height() );
 217         return QSize(0,0);
 218     }
 219 }
 220
 221 void Amarok::ToolTip::position()
 222 {
 223     /*const QRect drect = QApplication::desktop()->availableGeometry( QToolTip::parentWidget() );
 224     const QSize size = sizeHint();
 225     const int width = size.width(), height = size.height();
 226     QPoint pos;
 227     if( !s_rect.isNull() )
 228     {
 229         pos = s_rect.topLeft();
 230         if( pos.y() + height > drect.bottom() )
 231             pos.setY( qMax( drect.top(), drect.bottom() - height ) );
 232         if( pos.x() + width > drect.right() )
 233             pos.setX( qMax( drect.left(), drect.right() - width ) );
 234     }
 235     else
 236     {
 237         const QRect r = QRect( QToolTip::parentWidget()->mapToGlobal( QToolTip::parentWidget()->pos() ), QToolTip::parentWidget()->size() );
 238         pos = r.bottomRight();
 239         if( pos.y() + height > drect.bottom() )
 240             pos.setY( qMax( drect.top(), r.top() - height ) );
 241         if( pos.x() + width > drect.right() )
 242             pos.setX( qMax( drect.left(), r.left() - width ) );
 243     }
 244
 245     move( pos );*/
 246 }
 247
 248 #include "tooltip.moc"