Make sure that text lines aren't squeezed together in new Qt versions

In recent Qt 4.6 versions, there is a commit[1] that changes behavior wrt to lineSpacing() and
friends. Since (at least on my box) the font leading (the distance between text lines) seems to be
always -1 (for reasons as of yet unbeknownst to me), using lineSpacing() lets text lines in ChatView
overlap. This workarounds this with using at least height().

[1] http://qt.gitorious.org/qt/qt/commit/04d18b38c38c5ff623b30366ea08d56128b9b7d0

diff --git a/src/qtui/chatitem.cpp b/src/qtui/chatitem.cpp
index b1a071b..c40fd34 100644 (file)
--- a/src/qtui/chatitem.cpp
+++ b/src/qtui/chatitem.cpp
@@ -426,7 +426,8 @@ qreal ContentsChatItem::setGeometryByWidth(qreal w) {
   WrapColumnFinder finder(this);
   while(finder.nextWrapColumn(w) > 0)
     lines++;
-  qreal h = lines * fontMetrics()->lineSpacing();
+  qreal spacing = qMax(fontMetrics()->lineSpacing(), fontMetrics()->height());  // cope with negative leading()
+  qreal h = lines * spacing;
   delete _data;
   _data = 0;
 
@@ -443,6 +444,7 @@ void ContentsChatItem::doLayout(QTextLayout *layout) const {
   if(!wrapList.count()) return; // empty chatitem
 
   qreal h = 0;
+  qreal spacing = qMax(fontMetrics()->lineSpacing(), fontMetrics()->height());  // cope with negative leading()
   WrapColumnFinder finder(this);
   layout->beginLayout();
   forever {
@@ -469,7 +471,7 @@ void ContentsChatItem::doLayout(QTextLayout *layout) const {
     }
 
     line.setPosition(QPointF(0, h));
-    h += fontMetrics()->lineSpacing();
+    h += spacing;
   }
   layout->endLayout();
 }