- Fix for calculating tab width (using QFontMetricsF).

- Don't require fixed width fonts in KDE version.
Signed-off-by: joachim99 <joachim.eibl@gmx.de>

kdiff3/src-QT4/difftextwindow.cpp

@@ -794,7 +794,7 @@ public:
 void DiffTextWindowData::prepareTextLayout( QTextLayout& textLayout, bool bFirstLine, int visibleTextWidth )
 {
    QTextOption textOption;
-   textOption.setTabStop( m_pDiffTextWindow->fontMetrics().width(' ') * m_pOptions->m_tabSize );
+   textOption.setTabStop( QFontMetricsF(m_pDiffTextWindow->font()).width(' ') * m_pOptions->m_tabSize );
    if ( m_pOptions->m_bShowWhiteSpaceCharacters )
       textOption.setFlags( QTextOption::ShowTabsAndSpaces );
    if ( m_pOptions->m_bRightToLeftLanguage )

kdiff3/src-QT4/mergeresultwindow.cpp

@@ -1673,7 +1673,7 @@ QVector<QTextLayout::FormatRange> MergeResultWindow::getTextLayoutForLine(int li
 {
    // tabs
    QTextOption textOption;
-   textOption.setTabStop( fontMetrics().width(' ') * m_pOptions->m_tabSize );
+   textOption.setTabStop( QFontMetricsF(font()).width(' ') * m_pOptions->m_tabSize );
    if ( m_pOptions->m_bShowWhiteSpaceCharacters )
    {
       textOption.setFlags( QTextOption::ShowTabsAndSpaces );

kdiff3/src-QT4/optiondialog.cpp

@@ -199,8 +199,8 @@ public:
       *m_pVar = defaultVal;
       m_defaultVal = defaultVal;
    }
-   void setToDefault(){ setFont( m_defaultVal, true /*only fixed*/ ); }
-   void setToCurrent(){ setFont( *m_pVar, true /*only fixed*/ ); }
+   void setToDefault(){ setFont( m_defaultVal, false ); }
+   void setToCurrent(){ setFont( *m_pVar, false ); }
    void apply()       { *m_pVar = font();}
    void write(ValueMap* config){ config->writeEntry(m_saveName, *m_pVar );   }
    void read (ValueMap* config){ *m_pVar = config->readFontEntry( m_saveName, m_pVar ); }