[Plplot-cvs] SF.net SVN: plplot:[11579] trunk/bindings/qt_gui/plqt.cpp

[<ai...@us...>]

Revision: 11579
          http://plplot.svn.sourceforge.net/plplot/?rev=11579&view=rev
Author:   airwin
Date:     2011-02-25 22:36:39 +0000 (Fri, 25 Feb 2011)

Log Message:
-----------
Replace drawConvexPolygon with drawPolygon.  This fixes a -dev qtwidget
bug for example 27 which has complex (i.e., not convex) boundaries for
the filled polygons that are plotted.

Use Qt::WindingFill fill rule rather than the (default)
Qt::OddEvenFill fill rule.  This makes a major difference for the
example 27 fill results. For some reason the former is implemented in
the Qt4 library in a much less buggy way than the latter.

N.B. the Qt::WindingFill fill rule is ignored by the svgqt device.
Instead, the resulting svg file has the incorrect oddeven fill
attribute.  This must be a bug in the Qt4 library implementation (at
least for the 4.6.3 Debian squeeze version of Qt4).

Modified Paths:
--------------
    trunk/bindings/qt_gui/plqt.cpp

Modified: trunk/bindings/qt_gui/plqt.cpp
===================================================================
--- trunk/bindings/qt_gui/plqt.cpp	2011-02-25 12:00:57 UTC (rev 11578)
+++ trunk/bindings/qt_gui/plqt.cpp	2011-02-25 22:36:39 UTC (rev 11579)
@@ -127,7 +127,7 @@
         polygon[i].setX( (PLFLT) x[i] * downscale );
         polygon[i].setY( m_dHeight - (PLFLT) y[i] * downscale );
     }
-    m_painterP->drawPolygon( polygon, npts );
+    m_painterP->drawPolygon( polygon, npts, Qt::WindingFill );
     delete[] polygon;
 }
 
@@ -1295,7 +1295,7 @@
                 p->setPen( NoPen );
                 hasPen = false;
             }
-            p->drawConvexPolygon( *( i->Data.Polyline ) );
+            p->drawPolygon( *( i->Data.Polyline ), Qt::WindingFill );
             p->setRenderHints( QPainter::Antialiasing, (bool) lines_aa );
             break;
 


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