Fix font units. On Mac OS X, QT may return 0 for certain font metrics components.

8 files changed, 14 insertions, 4 deletions

diff --git a/src/gui/conversation.cc b/src/gui/conversation.cc
index 64308665..6a1ecb18 100644
--- a/src/gui/conversation.cc
+++ b/src/gui/conversation.cc
@@ -1,5 +1,6 @@
-// Copyright (C) 2011, Gabriel Dos Reis.
+// Copyright (C) 2011-2013, Gabriel Dos Reis.
 // All rights reserved.
+// Written by Gabriel Dos Reis.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
@@ -44,7 +45,10 @@ namespace OpenAxiom {
    // associated with `w'.
    static QSize font_units(const QWidget* w) {
       const QFontMetrics fm = w->fontMetrics();
-      return QSize(fm.maxWidth(), fm.lineSpacing());
+      const auto h = fm.lineSpacing();
+      if (auto w = fm.maxWidth())
+         return { w, h };
+      return { fm.width('W'), h };
    }
 
    // Return true if the QString `s' is morally an empty string.
diff --git a/src/gui/conversation.h b/src/gui/conversation.h
index 90f461a7..ff1a847d 100644
--- a/src/gui/conversation.h
+++ b/src/gui/conversation.h
@@ -1,5 +1,6 @@
-// Copyright (C) 2011, Gabriel Dos Reis.
+// Copyright (C) 2011-2013, Gabriel Dos Reis.
 // All rights reserved.
+// Written by Gabriel Dos Reis.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
diff --git a/src/gui/debate.cc b/src/gui/debate.cc
index dbec1ae8..f96e5427 100644
--- a/src/gui/debate.cc
+++ b/src/gui/debate.cc
@@ -1,5 +1,6 @@
 // Copyright (C) 2011-2013, Gabriel Dos Reis.
 // All rights reserved.
+// Written by Gabriel Dos Reis.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
diff --git a/src/gui/debate.h b/src/gui/debate.h
index 5e5356bb..1c5adf05 100644
--- a/src/gui/debate.h
+++ b/src/gui/debate.h
@@ -1,5 +1,6 @@
 // Copyright (C) 2011-2013, Gabriel Dos Reis.
 // All rights reserved.
+// Written by Gabriel Dos Reis.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
diff --git a/src/gui/gui.pro.in b/src/gui/gui.pro.in
index 5dbc49bf..6969b454 100644
--- a/src/gui/gui.pro.in
+++ b/src/gui/gui.pro.in
@@ -1,4 +1,4 @@
-## Copyright (C) 2011 Gabriel Dos Reis.
+## Copyright (C) 2011-2013 Gabriel Dos Reis.
 ## All rights reserved.
 ## Autoconf template file for the benefit of QMake 
 ## Written by Gabriel Dos Reis.
diff --git a/src/gui/main-window.cc b/src/gui/main-window.cc
index caa6771c..6d3eb205 100644
--- a/src/gui/main-window.cc
+++ b/src/gui/main-window.cc
@@ -1,5 +1,6 @@
 // Copyright (C) 2011-2013, Gabriel Dos Reis.
 // All rights reserved.
+// Written by Gabriel Dos Reis.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
diff --git a/src/gui/main-window.h b/src/gui/main-window.h
index 4b74828f..5e08067e 100644
--- a/src/gui/main-window.h
+++ b/src/gui/main-window.h
@@ -1,5 +1,6 @@
 // Copyright (C) 2011, Gabriel Dos Reis.
 // All rights reserved.
+// Written by Gabriel Dos Reis.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
diff --git a/src/gui/main.cc b/src/gui/main.cc
index e6db3db6..bbbdd852 100644
--- a/src/gui/main.cc
+++ b/src/gui/main.cc
@@ -1,5 +1,6 @@
 // Copyright (C) 2011-2013, Gabriel Dos Reis.
 // All rights reserved.
+// Written by Gabriel Dos Reis.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are