filesharing/simple/krichtextlabel.cpp

   1 /* This file is part of the KDE libraries
   2    Copyright (C) 2005 Waldo Bastian <bastian@kde.org>
   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 version 2 as published by the Free Software Foundation.
   7
   8    This library is distributed in the hope that it will be useful,
   9    but WITHOUT ANY WARRANTY; without even the implied warranty of
  10    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11    Library General Public License for more details.
  12
  13    You should have received a copy of the GNU Library General Public License
  14    along with this library; see the file COPYING.LIB.  If not, write to
  15    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  16    Boston, MA 02110-1301, USA.
  17 */
  18
  19 #include "krichtextlabel.h"
  20 #include <QTextDocument>
  21
  22
  23 #include <q3stylesheet.h>
  24 #include <q3simplerichtext.h>
  25 #include <qtextdocument.h>
  26 //Added by qt3to4:
  27 #include <QLabel>
  28
  29 #include <kglobalsettings.h>
  30
  31 static QString qrichtextify( const QString& text )
  32 {
  33   if ( text.isEmpty() || text[0] == '<' )
  34     return text;
  35
  36   QStringList lines = QStringList::split('\n', text);
  37   for(QStringList::Iterator it = lines.begin(); it != lines.end(); ++it)
  38   {
  39     *it = Qt::convertFromPlainText( *it, Qt::WhiteSpaceNormal );
  40   }
  41
  42   return lines.join(QString::null);     //krazy:exclude=nullstrassign for old broken gcc
  43 }
  44
  45 KRichTextLabel::KRichTextLabel( const QString &text , QWidget *parent )
  46  : QLabel ( parent ) {
  47   m_defaultWidth = qMin(400, KGlobalSettings::desktopGeometry(this).width()*2/5);
  48   setWordWrap( true );
  49   setText(text);
  50 }
  51
  52 KRichTextLabel::KRichTextLabel( QWidget *parent )
  53  : QLabel ( parent ) {
  54   m_defaultWidth = qMin(400, KGlobalSettings::desktopGeometry(this).width()*2/5);
  55   setWordWrap( true );
  56 }
  57
  58 void KRichTextLabel::setDefaultWidth(int defaultWidth)
  59 {
  60   m_defaultWidth = defaultWidth;
  61   updateGeometry();
  62 }
  63
  64 QSizePolicy KRichTextLabel::sizePolicy() const
  65 {
  66   return QSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::Minimum, false);
  67 }
  68
  69 QSize KRichTextLabel::minimumSizeHint() const
  70 {
  71   QString qt_text = qrichtextify( text() );
  72   int pref_width = 0;
  73   int pref_height = 0;
  74   QTextDocument rt;
  75   rt.setHtml( qt_text );
  76
  77   pref_width = m_defaultWidth;
  78   rt.setTextWidth(pref_width);
  79   int used_width = rt.idealWidth();
  80   if (used_width <= pref_width)
  81   {
  82     while(true)
  83     {
  84       int new_width = (used_width * 9) / 10;
  85       rt.setTextWidth(new_width);
  86       int new_height = rt.size().height();
  87       if (new_height > pref_height)
  88         break;
  89       used_width = rt.idealWidth();
  90       if (used_width > new_width)
  91         break;
  92     }
  93     pref_width = used_width;
  94   }
  95   else
  96   {
  97     if (used_width > (pref_width *2))
  98       pref_width = pref_width *2;
  99     else
 100       pref_width = used_width;
 101   }
 102
 103   return QSize(pref_width, rt.size().height());
 104 }
 105
 106 QSize KRichTextLabel::sizeHint() const
 107 {
 108   return minimumSizeHint();
 109 }
 110
 111 void KRichTextLabel::setText( const QString &text ) {
 112   QLabel::setText(text);
 113 }
 114
 115 void KRichTextLabel::virtual_hook( int, void* )
 116 { /*BASE::virtual_hook( id, data );*/ }
 117
 118 #include "krichtextlabel.moc"