src/pkg/QY2LayoutUtils.cc

   1 /*---------------------------------------------------------------------\
   2 |                                                                      |
   3 |                      __   __    ____ _____ ____                      |
   4 |                      \ \ / /_ _/ ___|_   _|___ \                     |
   5 |                       \ V / _` \___ \ | |   __) |                    |
   6 |                        | | (_| |___) || |  / __/                     |
   7 |                        |_|\__,_|____/ |_| |_____|                    |
   8 |                                                                      |
   9 |                               core system                            |
  10 |                                                        (C) SuSE GmbH |
  11 \----------------------------------------------------------------------/
  12
  13   File:       QY2LayoutUtils.cc
  14
  15   Author:     Stefan Hundhammer <sh@suse.de>
  16
  17   These are pure Qt functions - they can be used independently of YaST2.
  18
  19 /-*/
  20
  21
  22 #include <qapplication.h>
  23 #include <qwidget.h>
  24 #include <QDesktopWidget>
  25 #include "QY2LayoutUtils.h"
  26
  27
  28 QWidget * addVStretch( QWidget * parent )
  29 {
  30     QWidget * spacer = new QWidget( parent );
  31     spacer->setSizePolicy( QSizePolicy( QSizePolicy::Minimum, QSizePolicy::Expanding ) ); // hor/vert
  32
  33     return spacer;
  34 }
  35
  36
  37 QWidget * addHStretch( QWidget * parent )
  38 {
  39     QWidget * spacer = new QWidget( parent );
  40     spacer->setSizePolicy( QSizePolicy( QSizePolicy::Expanding, QSizePolicy::Minimum ) ); // hor/vert
  41
  42     return spacer;
  43 }
  44
  45
  46 QWidget * addVSpacing( QWidget * parent, int height )
  47 {
  48     QWidget * spacer = new QWidget( parent );
  49     Q_CHECK_PTR( spacer );
  50     spacer->setFixedHeight( height );
  51
  52     return spacer;
  53 }
  54
  55
  56 QWidget * addHSpacing( QWidget * parent, int width )
  57 {
  58     QWidget * spacer = new QWidget( parent );
  59     Q_CHECK_PTR( spacer );
  60     spacer->setFixedWidth( width );
  61
  62     return spacer;
  63 }
  64
  65
  66 QSize
  67 limitToScreenSize( const QWidget * widget, int width, int height )
  68 {
  69     return limitToScreenSize( widget, QSize( width, height ) );
  70 }
  71
  72
  73 QSize
  74 limitToScreenSize( const QWidget * widget, const QSize & desiredSize )
  75 {
  76     QSize availableSize = QApplication::desktop()->availableGeometry( const_cast<QWidget*> (widget) ).size();
  77
  78     // Subtract WM decorations. There seems to be no reliable way to tell if
  79     // this is necessary at all (even fvwm2 claims it is a NETWM compliant
  80     // window manager) or how large the WM decorations are.
  81     // For the purpose of this function, let's assume we have to subtract the
  82     // common fvwm2 decoration size. This is simplistic and should be improved.
  83     availableSize -= QSize( 10, 35 );
  84
  85     return desiredSize.boundedTo( availableSize );
  86 }
  87