1. Moved font width calc for DXCC enitity display from LogBook to DisplayText.

2. The available character count is now updated by catching resizeEvents


git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@3545 ab8295b8-cf94-4d9e-aec4-7959e3be5d79

displaytext.cpp

@@ -2,9 +2,12 @@
 #include <QDebug>
 #include <QMouseEvent>
 
+
 DisplayText::DisplayText(QWidget *parent) :
     QTextBrowser(parent)
 {
+    _fontWidth = 8; // typical
+    _maxDisplayedCharacters = 48; // a nominal safe(?) value
 }
 
 void DisplayText::mouseDoubleClickEvent(QMouseEvent *e)
@@ -14,3 +17,18 @@ void DisplayText::mouseDoubleClickEvent(QMouseEvent *e)
   emit(selectCallsign(shift,ctrl));
   QTextBrowser::mouseDoubleClickEvent(e);
 }
+
+
+void DisplayText::setFont(QFont font)
+{
+  QFontMetrics qfm(font);
+  _fontWidth = qfm.averageCharWidth()+1;  // the plus one is emperical
+  QTextBrowser::setFont(font);
+}
+
+void DisplayText::resizeEvent(QResizeEvent * event)
+{
+    if (_fontWidth > 0 && _fontWidth < 999)
+        _maxDisplayedCharacters = width()/_fontWidth;
+    QTextBrowser::resizeEvent(event);
+}