Theme Editor: Fixed conditional viewport display

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27185 a1c6a512-1295-4272-9138-f99709370657
diff --git a/utils/themeeditor/graphics/rbscreen.h b/utils/themeeditor/graphics/rbscreen.h
index 25f7c07..7b8b830 100644
--- a/utils/themeeditor/graphics/rbscreen.h
+++ b/utils/themeeditor/graphics/rbscreen.h
@@ -49,6 +49,10 @@
 
     void loadViewport(QString name, RBViewport* view);
     void showViewport(QString name);
+    bool viewPortDisplayed(QString name)
+    {
+        return displayedViewports.contains(name);
+    }
 
     void loadImage(QString name, RBImage* image)
     {
@@ -84,6 +88,7 @@
     QMap<QString, RBImage*> images;
     QMap<QString, QString>* settings;
     QMap<int, RBFont*> fonts;
+    QList<QString> displayedViewports;
 
 };