knotes/knotebutton.cpp

   1 /*******************************************************************
   2  KNotes -- Notes for the KDE project
   3
   4  Copyright (c) 2002-2007, The KNotes Developers
   5
   6  This program is free software; you can redistribute it and/or
   7  modify it under the terms of the GNU General Public License
   8  as published by the Free Software Foundation; either version 2
   9  of the License, or (at your option) any later version.
  10
  11  This program is distributed in the hope that it will be useful,
  12  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  GNU General Public License for more details.
  15
  16  You should have received a copy of the GNU General Public License
  17  along with this program; if not, write to the Free Software
  18  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  19 *******************************************************************/
  20
  21 #include "knotebutton.h"
  22
  23 #include <kiconloader.h>
  24 #include <kicontheme.h>
  25
  26 #include <QIcon>
  27 #include <QPainter>
  28 #include <QPixmap>
  29 #include <QSizePolicy>
  30 #include <QStyle>
  31 #include <QStyleOption>
  32
  33
  34 KNoteButton::KNoteButton( const QString &icon, QWidget *parent )
  35   : QPushButton( parent )
  36 {
  37   setFocusPolicy( Qt::NoFocus );
  38   setSizePolicy( QSizePolicy( QSizePolicy::Fixed, QSizePolicy::Fixed ) );
  39
  40   setFlat( true );
  41
  42   if ( !icon.isEmpty() ) {
  43     setIcon( KIconLoader::global()->loadIcon( icon, KIconLoader::Small, 10 ) );
  44   }
  45 }
  46
  47 KNoteButton::~KNoteButton()
  48 {
  49 }
  50
  51 void KNoteButton::enterEvent( QEvent * )
  52 {
  53   setFlat( false );
  54   repaint();
  55 }
  56
  57 void KNoteButton::leaveEvent( QEvent * )
  58 {
  59   setFlat( true );
  60   repaint();
  61 }
  62
  63 int KNoteButton::heightForWidth( int w ) const
  64 {
  65   return w;
  66 }
  67
  68 QSize KNoteButton::sizeHint() const
  69 {
  70   return QSize( QPushButton::sizeHint().height(),
  71                 QPushButton::sizeHint().height() );
  72 }
  73
  74 void KNoteButton::paintEvent( QPaintEvent * )
  75 {
  76   QPainter p( this );
  77
  78   // the button
  79   QStyleOption opt;
  80   opt.initFrom( this );
  81
  82   if ( isEnabled() ) {
  83     opt.state |= QStyle::State_Enabled;
  84   }
  85   if ( isDown() ) {
  86     opt.state |= QStyle::State_DownArrow;
  87   }
  88   if ( isCheckable() && isChecked() ) {
  89     opt.state |= QStyle::State_On;
  90   }
  91   if ( !isFlat() ) {
  92     if ( !isDown() ) {
  93       opt.state |= QStyle::State_Raised;
  94     } else {
  95       opt.state |= QStyle::State_MouseOver;
  96     }
  97   }
  98
  99   if ( ( opt.state & QStyle::State_MouseOver ) && ( ! ( opt.state & QStyle::State_DownArrow ) ) ) {
 100      style()->drawPrimitive( QStyle::PE_PanelButtonTool, &opt, &p, this );
 101   }
 102
 103   // the button label
 104   if ( !icon().isNull() ) {
 105     QIcon::Mode  mode  = QIcon::Disabled;
 106     QIcon::State state = QIcon::Off;
 107
 108     if ( opt.state & QStyle::State_Enabled ) {
 109       mode = hasFocus() ? QIcon::Active : QIcon::Normal;
 110     }
 111     if ( opt.state & QStyle::State_On ) {
 112       state = QIcon::On;
 113     }
 114
 115     QPixmap pix = icon().pixmap( style()->pixelMetric(
 116                                  QStyle::PM_SmallIconSize ), mode, state );
 117
 118     int dx = ( width() - pix.width() ) / 2;
 119     int dy = ( height() - pix.height() ) / 2;
 120
 121     // Shift button contents if pushed.
 122     if ( ( opt.state & QStyle::State_On ) || ( opt.state & QStyle::State_DownArrow ) ) {
 123       dx += style()->pixelMetric( QStyle::PM_ButtonShiftHorizontal );
 124       dy += style()->pixelMetric( QStyle::PM_ButtonShiftVertical );
 125     }
 126
 127     p.drawPixmap( dx, dy, pix );
 128   }
 129 }
 130
 131 #include "knotebutton.moc"