Document wxPrintQuality and wxPRINT_QUALITY_XXX constants.

Closes #14081.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@70865 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/wx/defs.h

@@ -1195,6 +1195,16 @@ enum wxDuplexMode
     wxDUPLEX_VERTICAL
 };
 
+/**
+    Print quality.
+*/
+#define wxPRINT_QUALITY_HIGH    -1
+#define wxPRINT_QUALITY_MEDIUM  -2
+#define wxPRINT_QUALITY_LOW     -3
+#define wxPRINT_QUALITY_DRAFT   -4
+
+typedef int wxPrintQuality;
+
 /**
     Print mode (currently PostScript only).
 */