korganizer/kodecorationlabel.cpp

   1 /*
   2   This file is part of KOrganizer.
   3   Copyright (c) 2001 Cornelius Schumacher <schumacher@kde.org>
   4   Copyright (C) 2003-2004 Reinhold Kainhofer <reinhold@kainhofer.com>
   5   Copyright (C) 2007 Loïc Corbasson <loic.corbasson@gmail.com>
   6
   7   This program is free software; you can redistribute it and/or modify
   8   it under the terms of the GNU General Public License as published by
   9   the Free Software Foundation; either version 2 of the License, or
  10   (at your option) any later version.
  11
  12   This program is distributed in the hope that it will be useful,
  13   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  15   GNU General Public License for more details.
  16
  17   You should have received a copy of the GNU General Public License along
  18   with this program; if not, write to the Free Software Foundation, Inc.,
  19   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  20
  21   As a special exception, permission is given to link this program
  22   with any edition of Qt, and distribute the resulting executable,
  23   without including the source code for Qt in the source distribution.
  24 */
  25
  26 #include "kodecorationlabel.h"
  27
  28 #include <KToolInvocation>
  29
  30 #include <QtGui/QMouseEvent>
  31 #include <QtGui/QResizeEvent>
  32
  33 #include "kodecorationlabel.moc"
  34
  35 KODecorationLabel::KODecorationLabel( KOrg::CalendarDecoration::Element *e,
  36                                       QWidget *parent )
  37   : QLabel( parent ), mAutomaticSqueeze( true ), mDecorationElement( e ),
  38     mShortText( e->shortText() ), mLongText( e->longText() ),
  39     mExtensiveText( e->extensiveText() )
  40 {
  41   mPixmap = e->newPixmap( size() );
  42   mUrl = e->url();
  43   setUrl( e->url() );
  44
  45   connect( e, SIGNAL( gotNewExtensiveText( const QString & ) ),
  46            this, SLOT( setExtensiveText( const QString & ) ) );
  47   connect( e, SIGNAL( gotNewLongText( const QString & ) ),
  48            this, SLOT( setLongText( const QString & ) ) );
  49   connect( e, SIGNAL( gotNewPixmap( const QPixmap & ) ),
  50            this, SLOT( setPixmap( const QPixmap & ) ) );
  51   connect( e, SIGNAL( gotNewShortText( const QString & ) ),
  52            this, SLOT( setShortText( const QString & ) ) );
  53   connect( e, SIGNAL( gotNewUrl( const KUrl & ) ),
  54            this, SLOT( setUrl( const KUrl & ) ) );
  55   squeezeContentsToLabel();
  56 }
  57
  58 KODecorationLabel::KODecorationLabel( const QString &shortText,
  59                                       const QString &longText,
  60                                       const QString &extensiveText,
  61                                       const QPixmap &pixmap,
  62                                       const KUrl &url,
  63                                       QWidget *parent )
  64   : QLabel( parent ), mAutomaticSqueeze( true ), mShortText( shortText ),
  65     mLongText( longText ), mExtensiveText( extensiveText ),
  66     mPixmap( pixmap )
  67 {
  68   setUrl( url );
  69
  70   squeezeContentsToLabel();
  71 }
  72
  73 KODecorationLabel::~KODecorationLabel()
  74 {
  75 }
  76
  77 void KODecorationLabel::mouseReleaseEvent( QMouseEvent *event )
  78 {
  79   QLabel::mouseReleaseEvent( event );
  80
  81   switch ( event->button() ) {
  82     case Qt::LeftButton:
  83       if ( ! mUrl.isEmpty() ) {
  84         KToolInvocation::invokeBrowser( mUrl.url() );
  85         setForegroundRole( QPalette::LinkVisited );
  86       }
  87       break;
  88     case Qt::MidButton:
  89     case Qt::RightButton:
  90     default:
  91       break;
  92   }
  93 }
  94
  95 void KODecorationLabel::resizeEvent( QResizeEvent *event )
  96 {
  97   mPixmap = mDecorationElement->newPixmap( event->size() );
  98   QLabel::resizeEvent( event );
  99   squeezeContentsToLabel();
 100 }
 101
 102 void KODecorationLabel::setExtensiveText( const QString &text )
 103 {
 104   mExtensiveText = text;
 105   squeezeContentsToLabel();
 106 }
 107
 108 void KODecorationLabel::setLongText( const QString &text )
 109 {
 110   mLongText = text;
 111   squeezeContentsToLabel();
 112 }
 113
 114 void KODecorationLabel::setPixmap( const QPixmap &pixmap )
 115 {
 116   mPixmap = pixmap.scaled( size(), Qt::KeepAspectRatio );
 117   squeezeContentsToLabel();
 118 }
 119
 120 void KODecorationLabel::setShortText( const QString &text )
 121 {
 122   mShortText = text;
 123   squeezeContentsToLabel();
 124 }
 125
 126 void KODecorationLabel::setText( const QString &text )
 127 {
 128   setLongText( text );
 129 }
 130
 131 void KODecorationLabel::setUrl( const KUrl &url )
 132 {
 133   mUrl = url;
 134   QFont f = font();
 135   if ( url.isEmpty() ) {
 136     setForegroundRole( QPalette::WindowText );
 137     f.setUnderline( false );
 138     setCursor( QCursor( Qt::ArrowCursor ) );
 139   } else {
 140     setForegroundRole( QPalette::Link );
 141     f.setUnderline( true );
 142     setCursor( QCursor( Qt::PointingHandCursor ) );
 143   }
 144   setFont( f );
 145 }
 146
 147 void KODecorationLabel::squeezeContentsToLabel()
 148 {
 149   if ( !mAutomaticSqueeze ) { // The content type to use has been set manually
 150     return;
 151   }
 152
 153   QFontMetrics fm( fontMetrics() );
 154
 155   int labelWidth = size().width();
 156   int longTextWidth = fm.width(mLongText);
 157   int extensiveTextWidth = fm.width(mExtensiveText);
 158
 159   if ( ! mPixmap.isNull() ) {
 160     usePixmap( true );
 161   } else if ( ( !mExtensiveText.isEmpty() ) && ( extensiveTextWidth <= labelWidth ) ) {
 162     useExtensiveText( true );
 163   } else if ( ( !mLongText.isEmpty() ) && ( longTextWidth <= labelWidth ) ) {
 164     useLongText( true );
 165   } else {
 166     useShortText( true );
 167   }
 168
 169   setAlignment( Qt::AlignCenter );
 170   setWordWrap( true );
 171   QSize msh = QLabel::minimumSizeHint();
 172   msh.setHeight( fontMetrics().lineSpacing() );
 173   msh.setWidth( 0 );
 174   setMinimumSize( msh );
 175   setSizePolicy( sizePolicy().horizontalPolicy(),
 176                  QSizePolicy::MinimumExpanding );
 177 }
 178
 179 void KODecorationLabel::useDefaultText()
 180 {
 181   mAutomaticSqueeze = false;
 182   squeezeContentsToLabel();
 183 }
 184
 185 void KODecorationLabel::useExtensiveText( bool allowAutomaticSqueeze )
 186 {
 187   mAutomaticSqueeze = allowAutomaticSqueeze;
 188   QLabel::setText( mExtensiveText );
 189   setToolTip( QString() );
 190 }
 191
 192 void KODecorationLabel::useLongText( bool allowAutomaticSqueeze )
 193 {
 194   mAutomaticSqueeze = allowAutomaticSqueeze;
 195   QLabel::setText( mLongText );
 196   setToolTip( mExtensiveText.isEmpty() ? QString() : mExtensiveText );
 197 }
 198
 199 void KODecorationLabel::usePixmap( bool allowAutomaticSqueeze )
 200 {
 201   mAutomaticSqueeze = allowAutomaticSqueeze;
 202   QLabel::setPixmap( mPixmap );
 203   setToolTip( mExtensiveText.isEmpty() ? mLongText : mExtensiveText );
 204 }
 205
 206 void KODecorationLabel::useShortText( bool allowAutomaticSqueeze )
 207 {
 208   mAutomaticSqueeze = allowAutomaticSqueeze;
 209   QLabel::setText( mShortText );
 210   setToolTip( mExtensiveText.isEmpty() ? mLongText : mExtensiveText );
 211 }