us_long_messagebox.cpp

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#include "us_long_messagebox.h"
#include "us_gui_settings.h"
#include "us_settings.h"

// Main constructor with title and message
US_LongMessageBox::US_LongMessageBox( const QString& title,
                                      const QString& message,
                                      QWidget* parent,
                                      Qt::WindowFlags f )
 :US_WidgetsDialog( parent, f )
{
   setAttribute  ( Qt::WA_DeleteOnClose );
   setWindowTitle( title );
   setPalette    ( US_GuiSettings::frameColor() );

   // Main layout
   QVBoxLayout* main = new QVBoxLayout( this );
   main->setContentsMargins( 2, 2, 2, 2 );
   main->setSpacing        ( 2 );

   // Create the text box
   textbox = us_textedit();
   textbox->setFrameStyle( QFrame::NoFrame || QFrame::Plain );
   textbox->setFont( QFont( US_GuiSettings::fontFamily(),
                            US_GuiSettings::fontSize() - 2 ) );
   textbox->setPlainText( message );
   adjustSize();
   textbox->show();

   // Create a button box with single OK button
   QDialogButtonBox* btnbox = new QDialogButtonBox( QDialogButtonBox::Ok );
   btnbox->setCenterButtons( true );
   connect( btnbox, SIGNAL( accepted() ),
            this,   SLOT(   close_diag() ) );

   main->addWidget( textbox );
   main->addWidget( btnbox  );
}

// Set the title string
void US_LongMessageBox::setTitle( const QString& title )
{
   setWindowTitle( title );
}

// Set new plain text
void US_LongMessageBox::setText( const QString& message )
{
   textbox->setPlainText( message );
   adjustSize();
}

// Set new rich text
void US_LongMessageBox::setHtml( const QString& message )
{
   textbox->setAcceptRichText( true );
   textbox->setHtml( message );
   adjustSize();
}

// Close
void US_LongMessageBox::close_diag( void )
{
   accept();
}

// Overloaded method to adjust size of message box
void US_LongMessageBox::adjustSize()
{
   textbox->adjustSize();
   QWidget::adjustSize();
   QSize wsize = frameSize();          // message box size, currently
   QSize tsize = textbox->frameSize(); // text box size
   QSize bsize = wsize - tsize;        // border dimensions

   if ( tsize.width() > wsize.width()  ||  tsize.height() > wsize.height() )
      bsize    = QSize( 4, 32 );       // minimum border dimensions

   QStringList alltext = textbox->toPlainText().split( "\n" );  // text lines
   int   nline = alltext.size();
   int   longx = -1;
   int   maxc  = -1;

   for ( int ii = 0; ii < nline; ii++ )
   {  // find the longest line and save its index
      int llen    = alltext[ ii ].length();

      if ( llen > maxc )
      {
         maxc        = llen;
         longx       = ii;
      }
   }

   // Determine the size needed for current text in current font
   QFontMetrics fm( textbox->font() );
   int fontw = fm.width( alltext[ longx ] ) + fm.width( "WW" );
   int fonth = fm.lineSpacing() * ( nline + 3 );
   fontw     = ( ( fontw / 20 + 1 ) * 20 );
   fonth     = ( ( fonth / 20 + 1 ) * 20 );

   tsize     = QSize( fontw, fonth );
   wsize     = tsize + bsize;

   textbox->resize( tsize );     // re-size text box
   resize( wsize );              // re-size dialog
}