MainWindow/BreadcrumbViewer.cpp

   1 #include "BreadcrumbViewer.h"
   2 #include <QTextDocument>
   3
   4 void BreadcrumbViewer::setBreadcrumbs( const Browser::BreadcrumbList& list )
   5 {
   6     _activeCrumbs = list.latest();
   7     updateText();
   8 }
   9
  10 void BreadcrumbViewer::linkClicked( const QString& link )
  11 {
  12     emit widenToBreadcrumb( _activeCrumbs[ link.toInt() ] );
  13 }
  14
  15 BreadcrumbViewer::BreadcrumbViewer()
  16 {
  17     connect( this, SIGNAL( linkActivated( QString ) ), this, SLOT( linkClicked( QString ) ) );
  18 }
  19
  20 /**
  21  * Format the text with hyperlinks. The tricky part is to handle the situation where all the text doesn't fit in.
  22  * The by far best solution would be to compress at a letter level, but this code is really only used in the rare
  23  * situation where the user chooses a very long path, as his window usually is somewhat wide.
  24  */
  25 void BreadcrumbViewer::updateText()
  26 {
  27     QStringList htmlList;
  28
  29     for ( int i = 0; i < _activeCrumbs.count()-1; ++i )
  30         htmlList.append( QString::fromLatin1("<a href=\"%1\">%2</a>").arg(i).arg(_activeCrumbs[i].text()) );
  31     if ( !_activeCrumbs[_activeCrumbs.count()-1].isView() )
  32         htmlList.append(_activeCrumbs[_activeCrumbs.count()-1].text());
  33
  34     QTextDocument doc;
  35     doc.setDefaultFont( font() );
  36
  37     QString res = htmlList.last();
  38     const QString ellipses = QChar(0x2026) + QString::fromLatin1(" > ");
  39     for ( int i = htmlList.count()-2; i >= 0; --i ) {
  40         // If we can't fit it in, then add ellipses
  41         const QString tmp = htmlList[i] + QString::fromLatin1(" > ") + res;
  42         doc.setHtml(tmp);
  43         if ( doc.size().width() > width() ) {
  44             res = ellipses + res;
  45             break;
  46         }
  47
  48         // now check that we can fit in ellipses if this was the last token
  49         const QString tmp2 = ellipses + tmp;
  50         doc.setHtml(tmp2);
  51         if ( doc.size().width() > width() && i != 0 ) {
  52             // Nope, so better stop here
  53             res = ellipses + res;
  54             break;
  55         }
  56
  57         res = tmp;
  58     }
  59
  60     setText( res );
  61
  62 }
  63
  64 void BreadcrumbViewer::resizeEvent( QResizeEvent* event )
  65 {
  66     QLabel::resizeEvent( event );
  67     updateText();
  68 }
  69
  70 QSize BreadcrumbViewer::minimumSizeHint() const
  71 {
  72     return QSize( 100, QLabel::minimumSizeHint().height() );
  73 }