src/YQCheckBoxFrame.cc

   1 /*---------------------------------------------------------------------\
   2 |                                                                      |
   3 |                      __   __    ____ _____ ____                      |
   4 |                      \ \ / /_ _/ ___|_   _|___ \                     |
   5 |                       \ V / _` \___ \ | |   __) |                    |
   6 |                        | | (_| |___) || |  / __/                     |
   7 |                        |_|\__,_|____/ |_| |_____|                    |
   8 |                                                                      |
   9 |                               core system                            |
  10 |                                                        (C) SuSE GmbH |
  11 \----------------------------------------------------------------------/
  12
  13   File:       YQCheckBoxFrame.cc
  14
  15   Author:     Stefan Hundhammer <sh@suse.de>
  16
  17 /-*/
  18
  19
  20 #define y2log_component "qt-ui"
  21 #include <ycp/y2log.h>
  22 #include <qcheckbox.h>
  23 //Added by qt3to4:
  24 #include <q3frame.h>
  25 #include <Q3GroupBox>
  26 #include <qevent.h>
  27 #include "YQUI.h"
  28 #include "YEvent.h"
  29 #include "utf8.h"
  30
  31 using std::max;
  32
  33 #include "YQCheckBoxFrame.h"
  34
  35 #define TOP_MARGIN 6
  36
  37
  38 YQCheckBoxFrame::YQCheckBoxFrame( YWidget *             parent,
  39                                   const string &        label,
  40                                   bool                  checked )
  41     : QGroupBox( (QWidget *) parent->widgetRep() )
  42     , YCheckBoxFrame( parent, label, checked)
  43 {
  44     setWidgetRep ( this );
  45     QGroupBox::setTitle( fromUTF8( label ) );
  46     QGroupBox::setCheckable( true );
  47     preventQGroupBoxAutoEnablement();
  48
  49     setValue( checked );
  50 }
  51
  52
  53 void YQCheckBoxFrame::setLabel( const string & newLabel )
  54 {
  55     YCheckBoxFrame::setLabel( newLabel );
  56     QGroupBox::setTitle( fromUTF8( label() ) );
  57 }
  58
  59
  60 bool YQCheckBoxFrame::value()
  61 {
  62     return _checkBox ? _checkBox->isChecked() : QGroupBox::isChecked();
  63 }
  64
  65
  66 void YQCheckBoxFrame::setValue( bool newValue )
  67 {
  68     if ( _checkBox )
  69         _checkBox->setChecked( newValue );
  70     else
  71         setChecked( newValue );
  72 }
  73
  74
  75 void YQCheckBoxFrame::setEnabled( bool enabled )
  76 {
  77     if ( enabled )
  78     {
  79         QGroupBox::setEnabled( true );
  80         handleChildrenEnablement( value() );
  81     }
  82     else
  83     {
  84         QGroupBox::setEnabled( true );
  85         YWidget::setChildrenEnabled( false );
  86     }
  87
  88     YWidget::setEnabled( enabled );
  89 }
  90
  91
  92 void YQCheckBoxFrame::preventQGroupBoxAutoEnablement()
  93 {
  94     /*
  95      * This is a nasty hack. But it is necessary because QGroupBox handles its
  96      * internal check box too nearsightedly: It forces all children to be
  97      * enabled or disabled depending on the status of the check box. The
  98      * behaviour cannot be inverted or suppressed.
  99      *
 100      * In some cases, however, it makes sense to let the application decide to
 101      * handle that differently. Since the YaST2 UI is a toolkit, we leave this
 102      * decision up to the application rather than forcing any specific behaviour.
 103      */
 104
 105     // Find the check box in the child hierarchy (as a direct child)
 106     // NOTE findChild search recursively by default
 107     _checkBox = QObject::findChild<QCheckBox *>();
 108
 109     if ( ! _checkBox )
 110     {
 111         y2warning( "Can't find QCheckBox child" );
 112
 113         connect( this, SIGNAL( toggled     ( bool ) ),
 114                  this, SLOT  ( stateChanged( bool ) ) );
 115
 116         return;
 117     }
 118
 119     // Disconnect all signals to this object.
 120     //
 121     // In particular, disconnect the connection from the check box's
 122     // 'toggled()' signal to this object's parent class's (private)
 123     // setChildrenEnabled() method.
 124
 125     disconnect( _checkBox,      // sender
 126                 0,              // signal
 127                 this,           // receiver
 128                 0 );            // slot (private method in parent class)
 129
 130     // Connect the check box directly to this class.
 131
 132     connect( _checkBox, SIGNAL( toggled     ( bool ) ),
 133              this,      SLOT  ( stateChanged( bool ) ) );
 134 }
 135
 136
 137 void YQCheckBoxFrame::stateChanged( bool newState )
 138 {
 139     y2debug( "new state: %d", newState );
 140     handleChildrenEnablement( newState );
 141
 142     if ( notify() )
 143         YQUI::ui()->sendEvent( new YWidgetEvent( this, YEvent::ValueChanged ) );
 144 }
 145
 146
 147 void YQCheckBoxFrame::childEvent( QChildEvent * )
 148 {
 149     // Reimplemented to prevent the parent class disabling child widgets
 150     // according to its default policy.
 151
 152     // y2debug( "ChildEvent" );
 153 }
 154
 155
 156 void
 157 YQCheckBoxFrame::setSize( int newWidth, int newHeight )
 158 {
 159     resize ( newWidth, newHeight );
 160
 161     if ( hasChildren() )
 162     {
 163 #warning possibly this hack is not needed
 164         /*
 165         int newChildWidth  = max ( 0, newWidth  - 2 * frameWidth() - 1 );
 166         int newChildHeight = max ( 0, newHeight - frameWidth() - fontMetrics().height() - TOP_MARGIN - 1 );
 167
 168         firstChild()->setSize( newChildWidth, newChildHeight );
 169
 170         QWidget * qChild = (QWidget *) firstChild()->widgetRep();
 171         qChild->move( frameWidth(), fontMetrics().height() + TOP_MARGIN );
 172         */
 173     }
 174 }
 175
 176
 177 int YQCheckBoxFrame::preferredWidth()
 178 {
 179     int preferredWidth;
 180     int childPreferredWidth = hasChildren() ? firstChild()->preferredWidth() : 0;
 181
 182     preferredWidth = max( childPreferredWidth,
 183                           (10 + fontMetrics().width( title() ) ) );
 184     // preferredWidth += 2*frameWidth() + 1;
 185
 186     return preferredWidth;
 187 }
 188
 189
 190 int YQCheckBoxFrame::preferredHeight()
 191 {
 192     int preferredHeight = hasChildren() ? firstChild()->preferredHeight() : 0;
 193     // preferredHeight += frameWidth() + fontMetrics().height() + TOP_MARGIN + 1;
 194
 195     return preferredHeight;
 196 }
 197
 198
 199 bool YQCheckBoxFrame::setKeyboardFocus()
 200 {
 201     setFocus();
 202
 203     return true;
 204 }
 205
 206
 207
 208
 209 #include "YQCheckBoxFrame.moc"